Some smaller changes and code cleanups

CMakeLists.txt

@@ -101,12 +101,7 @@ set(SOURCE_FILES
         #Logger
         src/log/LogUtils.cpp
         src/log/LogSinks.cpp
-
-
         src/qlz/QuickLZ.cpp
-        src/qlz/QuickLZ_L3.cpp
-        src/qlz/QuickLZ_L1.cpp
-
         src/converters/converter.cpp
 
         src/query/command3.cpp
@@ -155,7 +150,6 @@ set(HEADER_FILES
         src/misc/memtracker.h
         src/misc/strobf.h
 
-        src/log/translation.h
         src/log/LogUtils.h
 
         src/PermissionManager.h

src/Error.cpp

@@ -12,7 +12,7 @@ using namespace ts;
 #define define_error_description(type, description) \
 { error::type, str(type), description }
 
-const std::vector<ErrorType> ts::avariableErrors = {
+const std::vector<ErrorType> ts::availableErrors = {
         {0x0000, "ok"                                   , "ok"                                                         },
         {0x0001, "undefined"                            , "undefined error"                                            },
         {0x0002, "not_implemented"                      , "not implemented"                                            },
@@ -201,19 +201,19 @@ const std::vector<ErrorType> ts::avariableErrors = {
 
         {0xFFFF, "custom_error"                         , "costume"                                                    },
 };
-ErrorType ErrorType::Success = avariableErrors[0];
+ErrorType ErrorType::Success = availableErrors[0];
 ErrorType ErrorType::Costume = findError("custom_error");
 ErrorType ErrorType::VSError = findError("vs_critical");
 ErrorType ErrorType::DBEmpty = findError("database_empty_result");
 
 ErrorType ts::findError(uint16_t errorId){
-    for(auto elm : avariableErrors)
+    for(auto elm : availableErrors)
         if(elm.errorId == errorId) return elm;
     return ErrorType{errorId, "undefined", "undefined"};
 }
 
 ErrorType ts::findError(std::string key){
-    for(auto elm : avariableErrors)
+    for(auto elm : availableErrors)
         if(elm.name == key) return elm;
     return ErrorType{1, key, "undefined"};
 }

src/Error.h

@@ -10,10 +10,7 @@
 #include <vector>
 #include <map>
 
-#define _NDEBUG
-
 namespace ts {
-    struct CommandResult;
     namespace permission {
         enum PermissionType : uint16_t;
     }
@@ -365,8 +362,8 @@ namespace ts {
 
         explicit command_result(command_result_bulk&&);
 
-#ifndef _NDEBUG
+#if !defined(_NDEBUG) && false
-        /* if we're not using any debug we dont have to use a deconstructor. A deconstructor prevent a direct uint64_t return as described above */
+        /* if we're not using any debug we dont have to use a destructor. A destructor prevent a direct uint64_t return as described above */
         ~command_result() {
             assert(this->data == 0);
         }
@@ -457,15 +454,15 @@ namespace ts {
             std::string message;
 
             bool operator==(const ErrorType& ref) const {
-                return errorId == ref.errorId;
+                return this->errorId == ref.errorId;
             }
 
             bool operator!=(const ErrorType& ref) const { return !operator==(ref); }
 
             ErrorType& operator=(const ErrorType& ref) {
-                errorId = ref.errorId;
+                this->errorId = ref.errorId;
-                name = ref.name;
+                this->name = ref.name;
-                message = ref.message;
+                this->message = ref.message;
                 return *this;
             }
 
@@ -477,9 +474,7 @@ namespace ts {
             }
     };
 
-    extern const std::vector<ErrorType> avariableErrors;
+    extern const std::vector<ErrorType> availableErrors;
     extern ErrorType findError(uint16_t errorId);
     extern ErrorType findError(std::string key);
-}
+}
-
-#undef _NDEBUG

src/converters/converter.cpp

@@ -34,7 +34,7 @@ CONVERTER_PRIMITIVE_ST(float, std::stof(std::string{str}));
 CONVERTER_PRIMITIVE_ST(double, std::stod(std::string{str}));
 CONVERTER_PRIMITIVE_ST(long_double, std::stold(std::string{str}));
 
-#if __x86_64__
+#if UINTPTR_WIDTH >= 64
 CONVERTER_PRIMITIVE_ST(long_long_unsigned_int_t, std::stoull(std::string{str}));
 #endif
 

src/log/LogSinks.cpp

@@ -98,8 +98,9 @@ namespace logger {
             const auto& mapping = level_mapping;
 #endif
             size_t level = msg.level.value;
-            if(level >= mapping.size())
+            if(level >= mapping.size()) {
                 level = mapping.size() - 1;
+            }
 
             append(mapping[level]);
         }
@@ -122,10 +123,11 @@ namespace logger {
             index = found;
 
             append(spdlog::details::os::default_eol);
-            if(++index)
+            if(++index) {
                 dest.append(prefix_begin, prefix_end);
-            else
+            } else {
                 break;
+            }
         }
     }
 

src/log/translation.cpp

@@ -1,5 +0,0 @@
-//
-// Created by wolverindev on 12.06.18.
-//
-
-#include "translation.h"

src/log/translation.h

@@ -1,13 +0,0 @@
-#pragma once
-
-namespace tr {
-    enum Messages {
-        kick_invalid_badges,
-        kick_invalid_packet,
-        kick_invalid_command,
-
-        crash_instance,
-        shutdown_instance,
-        shutdown_server,
-    };
-}

src/lookup/ip.h

@@ -29,11 +29,13 @@ namespace lookup {
                 bucket_t* bucket = &this->buckets[hash];
 
                 std::lock_guard lock{this->bucket_locks[hash]};
-                while(bucket->entry_count == kBukkitSize && bucket->next)
+                while(bucket->entry_count == kBukkitSize && bucket->next) {
                     bucket = bucket->next;
+                }
 
-                if(bucket->entry_count == kBukkitSize)
+                if(bucket->entry_count == kBukkitSize) {
                     bucket = (bucket->next = new bucket_t{});
+                }
 
                 auto& entry = bucket->entries[bucket->entry_count++];
                 addr_converter{}(entry.address, address);
@@ -55,9 +57,11 @@ namespace lookup {
 
                 size_t entry_index;
                 do {
-                    for(entry_index = 0; entry_index < bucket->entry_count; entry_index++)
+                    for(entry_index = 0; entry_index < bucket->entry_count; entry_index++) {
-                        if(auto& entry{bucket->entries[entry_index]}; cmp(entry.address, addr))
+                        if(auto& entry{bucket->entries[entry_index]}; cmp(entry.address, addr)) {
                             goto entry_found;
+                        }
+                    }
                 } while((bucket = bucket->next));
 
                 /* entry hasn't been found */
@@ -66,8 +70,9 @@ namespace lookup {
                 entry_found:
 
                 next_bucket = bucket;
-                while(next_bucket->next && next_bucket->next->entry_count > 0)
+                while(next_bucket->next && next_bucket->next->entry_count > 0) {
                     next_bucket = next_bucket->next;
+                }
 
                 /* swap the entry with the last entry and just remove the value */
                 next_bucket->entry_count--;
@@ -76,8 +81,9 @@ namespace lookup {
             }
 
             inline void cleanup() {
-                for(size_t bucket_index{0}; bucket_index < kBukkitListSize; bucket_index++)
+                for(size_t bucket_index{0}; bucket_index < kBukkitListSize; bucket_index++) {
                     cleanup_bucket(bucket_index);
+                }
             }
 
             inline void cleanup_bucket(size_t index) {
@@ -87,8 +93,9 @@ namespace lookup {
                     auto& bucket = this->buckets[index];
 
                     bucket_t* prev{nullptr}, curr{&bucket};
-                    while(curr.entry_count > 0 && curr.next)
+                    while(curr.entry_count > 0 && curr.next) {
                         prev = std::exchange(curr, curr.next);
+                    }
 
                     if(curr.entry_count == 0) {
                         prev->next = nullptr;
@@ -119,9 +126,11 @@ namespace lookup {
                 {
                     std::lock_guard lock{this->bucket_locks[hash]};
                     do {
-                        for(size_t index{0}; index < bucket->entry_count; index++)
+                        for(size_t index{0}; index < bucket->entry_count; index++) {
-                            if(auto& entry{bucket->entries[index]}; cmp(entry.address, addr))
+                            if(auto& entry{bucket->entries[index]}; cmp(entry.address, addr)) {
                                 return entry.entry;
+                            }
+                        }
                     } while((bucket = bucket->next));
                 }
 

src/protocol/CompressionHandler.cpp

@@ -3,42 +3,11 @@
 #define QLZ_COMPRESSION_LEVEL 1
 #define QLZ_MEMORY_SAFE
 #include "qlz/QuickLZ.h"
-#include "buffers.h"
 
 using namespace ts;
-using namespace ts::connection;
 using namespace std;
 
 namespace ts::compression {
-    class thread_buffer {
-        public:
-            void* get_buffer(size_t size) {
-                if(size > 1024 * 1024 *5) /* we don't want to keep such big buffers in memory */
-                    return malloc(size);
-
-                if(this->buffer_length < size) {
-                    free(this->buffer_ptr);
-
-                    size = std::max(size, (size_t) 1024);
-                    this->buffer_ptr = malloc(size);
-                    this->buffer_length = size;
-                }
-                return buffer_ptr;
-            }
-
-            void free_buffer(void* ptr) {
-                if(ptr == this->buffer_ptr) return;
-                free(ptr);
-            }
-
-            ~thread_buffer() {
-                free(this->buffer_ptr);
-            }
-        private:
-            void* buffer_ptr{nullptr};
-            size_t buffer_length{0};
-    };
-
     class qlz_states {
         public:
             qlz_states() noexcept {
@@ -53,25 +22,28 @@ namespace ts::compression {
 
             qlz_state_compress* state_compress{nullptr};
             qlz_state_decompress* state_decompress{nullptr};
-        private:
     };
 
-    thread_local thread_buffer qlz_buffer{};
     thread_local qlz_states qlz_states{};
 
     size_t qlz_decompressed_size(const void* payload, size_t payload_length) {
-        if(payload_length < 9) return 0; /* payload too small */
+        if(payload_length < 9) {
+            return 0; /* payload too small */
+        }
 
         return qlz_size_decompressed((char*) payload) + 400;
     }
 
     bool qlz_decompress_payload(const void* payload, void* buffer, size_t* buffer_size) {
-        if(!qlz_states.state_decompress) return false;
+        if(!qlz_states.state_decompress) {
+            return false;
+        }
         assert(payload != buffer);
 
         size_t data_length = qlz_decompress((char*) payload, (char*) buffer, qlz_states.state_decompress);
-        if(data_length <= 0)
+        if(data_length <= 0) {
             return false;
+        }
 
         /* test for overflow */
         if(data_length > *buffer_size) terminate();
@@ -80,76 +52,29 @@ namespace ts::compression {
     }
 
     size_t qlz_compressed_size(const void* payload, size_t payload_length) {
+        (void) payload;
         assert(payload_length >= 9);
         return payload_length + 400; // http://www.quicklz.com/manual.html
     }
 
     bool qlz_compress_payload(const void* payload, size_t payload_length, void* buffer, size_t* buffer_length) {
-        if(!qlz_states.state_compress) return false;
+        if(!qlz_states.state_compress) {
+            return false;
+        }
 
         assert(payload != buffer);
         assert(*buffer_length >= qlz_compressed_size(payload, payload_length));
 
         size_t compressed_length = qlz_compress(payload, (char*) buffer, payload_length, qlz_states.state_compress);
-        if(compressed_length > *buffer_length) terminate();
+        if(compressed_length > *buffer_length) {
+            terminate();
+        }
 
-        if(compressed_length <= 0)
+        if(compressed_length <= 0) {
             return false;
+        }
+
         *buffer_length = compressed_length;
         return true;
     }
-}
+}
-
-bool CompressionHandler::compress(protocol::BasicPacket* packet, std::string &error) {
-    auto packet_payload = packet->data();
-    auto header_length = packet->length() - packet_payload.length();
-
-    size_t max_compressed_payload_size = compression::qlz_compressed_size(packet_payload.data_ptr(), packet_payload.length());
-    auto target_buffer = buffer::allocate_buffer(max_compressed_payload_size + header_length);
-
-    size_t compressed_size{max_compressed_payload_size};
-    if(!compression::qlz_compress_payload(packet_payload.data_ptr(), packet_payload.length(), &target_buffer[header_length], &compressed_size)) return false;
-
-    memcpy(target_buffer.data_ptr(), packet->buffer().data_ptr(), header_length);
-    packet->buffer(target_buffer.range(0, compressed_size + header_length));
-    return true;
-}
-
-bool CompressionHandler::decompress(protocol::BasicPacket* packet, std::string &error) {
-    auto expected_length = compression::qlz_decompressed_size(packet->data().data_ptr(), packet->data().length());
-    if(expected_length > this->max_packet_size){ //Max 16MB. (97% Compression!)
-        error = "Invalid packet size. (Calculated target length of " + to_string(expected_length) + ". Max length: " + to_string(this->max_packet_size) + ")";
-        return false;
-    } else if(expected_length == 0) {
-        error = "Failed to calculate decompressed packet length";
-        return false;
-    }
-    auto header_length = packet->header().length() + packet->mac().length();
-    auto buffer = buffer::allocate_buffer(expected_length + header_length);
-
-    size_t compressed_size{expected_length};
-    if(!compression::qlz_decompress_payload(packet->data().data_ptr(), &buffer[header_length], &compressed_size)) return false;
-    memcpy(buffer.data_ptr(), packet->buffer().data_ptr(), header_length);
-
-    packet->buffer(buffer.range(0, compressed_size + header_length));
-    return true;
-}
-
-bool CompressionHandler::progressPacketIn(protocol::BasicPacket* packet, std::string &error) {
-    if(packet->isCompressed()) {
-        if(!this->decompress(packet, error)) return false;
-        packet->setCompressed(false);
-    }
-    return true;
-}
-
-bool CompressionHandler::progressPacketOut(protocol::BasicPacket* packet, std::string& error) {
-    if(packet->has_flag(protocol::PacketFlag::Compressed) && !packet->isCompressed()) {
-        if(!this->compress(packet, error)) return false;
-        packet->setCompressed(true);
-    }
-    return true;
-}
-
-CompressionHandler::CompressionHandler() { }
-CompressionHandler::~CompressionHandler() { }

src/protocol/CompressionHandler.h

@@ -2,28 +2,11 @@
 
 #include "Packet.h"
 
-namespace ts {
+namespace ts::compression {
-    namespace compression {
+    /* Attention: These methods does not validate the data! */
-        /* Attention: These methods does not validate the data! */
+    size_t qlz_decompressed_size(const void* payload, size_t payload_length);
-        size_t qlz_decompressed_size(const void* payload, size_t payload_length);
+    bool qlz_decompress_payload(const void* payload, void* buffer, size_t* buffer_size); //Attention: payload & buffer must be different!
-        bool qlz_decompress_payload(const void* payload, void* buffer, size_t* buffer_size); //Attention: payload & buffer must be differen!
 
-        size_t qlz_compressed_size(const void* payload, size_t payload_length);
+    size_t qlz_compressed_size(const void* payload, size_t payload_length);
-        bool qlz_compress_payload(const void* payload, size_t payload_length, void* buffer, size_t* buffer_length);
+    bool qlz_compress_payload(const void* payload, size_t payload_length, void* buffer, size_t* buffer_length);
-    }
-    namespace connection {
-        class CompressionHandler {
-            public:
-                CompressionHandler();
-                virtual ~CompressionHandler();
-
-                bool progressPacketOut(protocol::BasicPacket*, std::string&);
-                bool progressPacketIn(protocol::BasicPacket*, std::string&);
-
-                size_t max_packet_size = 16 * 1024;
-            private:
-                bool compress(protocol::BasicPacket*, std::string &error);
-                bool decompress(protocol::BasicPacket*, std::string &error);
-        };
-    }
 }

src/protocol/CryptHandler.cpp

@@ -18,6 +18,8 @@ using namespace ts::protocol;
 
 CryptHandler::CryptHandler() {
     memtrack::allocated<CryptHandler>(this);
+    this->cipher_code = find_cipher("rijndael");
+    assert(this->cipher_code >= 0);
     this->reset();
 }
 
@@ -26,23 +28,26 @@ CryptHandler::~CryptHandler() {
 }
 
 void CryptHandler::reset() {
-    this->useDefaultChipherKeyNonce = true;
+    this->encryption_initialized_ = true;
     this->iv_struct_length = 0;
     memset(this->iv_struct, 0, sizeof(this->iv_struct));
     memcpy(this->current_mac, CryptHandler::default_mac, sizeof(CryptHandler::default_mac));
 
-    for(auto& cache : this->cache_key_client)
+    for(auto& cache : this->cache_key_client) {
         cache.generation = 0xFFEF;
-    for(auto& cache : this->cache_key_server)
+    }
+
+    for(auto& cache : this->cache_key_server) {
         cache.generation = 0xFFEF;
+    }
 }
 
 #define SHARED_KEY_BUFFER_LENGTH (256)
-bool CryptHandler::setupSharedSecret(const std::string& alpha, const std::string& beta, ecc_key *publicKey, ecc_key *ownKey, std::string &error) {
+bool CryptHandler::setupSharedSecret(const std::string& alpha, const std::string& beta, ecc_key *remote_public_key, ecc_key *own_private_key, std::string &error) {
     size_t buffer_length = SHARED_KEY_BUFFER_LENGTH;
     uint8_t buffer[SHARED_KEY_BUFFER_LENGTH];
     int err;
-    if((err = ecc_shared_secret(ownKey, publicKey, buffer, (unsigned long*) &buffer_length)) != CRYPT_OK){
+    if((err = ecc_shared_secret(own_private_key, remote_public_key, buffer, (unsigned long*) &buffer_length)) != CRYPT_OK){
         error = "Could not calculate shared secret. Message: " + string(error_to_string(err));
         return false;
     }
@@ -72,13 +77,13 @@ bool CryptHandler::setupSharedSecret(const std::string& alpha, const std::string
         digest::sha1((const char*) iv_buffer, SHA_DIGEST_LENGTH, mac_buffer);
         memcpy(this->current_mac, mac_buffer, 8);
 
-        this->useDefaultChipherKeyNonce = false;
+        this->encryption_initialized_ = false;
     }
 
     return true;
 }
 
-void _fe_neg(fe h, const fe f) {
+void fe_neg_(fe h, const fe f) {
     int32_t f0 = f[0];
     int32_t f1 = f[1];
     int32_t f2 = f[2];
@@ -118,8 +123,8 @@ inline void keyMul(uint8_t(& target_buffer)[32], const uint8_t* publicKey /* com
 
     ge_frombytes_negate_vartime(&keyA, publicKey);
     if(negate) {
-        _fe_neg(*(fe*) &keyA.X, *(const fe*) &keyA.X); /* undo negate */
+        fe_neg_(*(fe*) &keyA.X, *(const fe*) &keyA.X); /* undo negate */
-        _fe_neg(*(fe*) &keyA.T, *(const fe*) &keyA.T); /* undo negate */
+        fe_neg_(*(fe*) &keyA.T, *(const fe*) &keyA.T); /* undo negate */
     }
     ge_scalarmult_vartime(&result, privateKey, &keyA);
 
@@ -149,7 +154,7 @@ bool CryptHandler::setupSharedSecretNew(const std::string &alpha, const std::str
         uint8_t mac_buffer[SHA_DIGEST_LENGTH];
         digest::sha1((char*) this->iv_struct, 64, mac_buffer);
         memcpy(this->current_mac, mac_buffer, 8);
-        this->useDefaultChipherKeyNonce = false;
+        this->encryption_initialized_ = false;
     }
 
     return true;
@@ -185,7 +190,8 @@ bool CryptHandler::generate_key_nonce(
             }  else {
                 buffer[0] = 0x30;
             }
-            buffer[1] = (char) (type & 0xF);
+
+            buffer[1] = (char) (type & 0xFU);
 
             le2be32(generation, buffer, 2);
             memcpy(&buffer[6], this->iv_struct, this->iv_struct_length);
@@ -199,8 +205,8 @@ bool CryptHandler::generate_key_nonce(
     }
 
     //Xor the key
-    key[0] ^= (uint8_t) ((packet_id >> 8) & 0xFFU);
+    key[0] ^= (uint8_t) (packet_id >> 8U);
-    key[1] ^=(packet_id & 0xFFU);
+    key[1] ^= (uint8_t) packet_id;
 
     return true;
 }
@@ -211,8 +217,9 @@ bool CryptHandler::verify_encryption(const pipes::buffer_view &packet, uint16_t
 
     key_t key{};
     nonce_t nonce{};
-    if(!generate_key_nonce(true, (protocol::PacketType) (packet[12] & 0xF), packet_id, generation, key, nonce))
+    if(!generate_key_nonce(true, (protocol::PacketType) ((uint8_t) packet[12] & 0xFU), packet_id, generation, key, nonce)) {
         return false;
+    }
 
     auto mac = packet.view(0, 8);
     auto header = packet.view(8, 5);
@@ -220,14 +227,13 @@ bool CryptHandler::verify_encryption(const pipes::buffer_view &packet, uint16_t
 
     auto length = data.length();
 
-    /* static shareable void buffer */
+    const static unsigned long void_target_length{2048};
-    const static unsigned long void_target_length = 2048;
+    uint8_t void_target_buffer[2048];
-    static uint8_t void_target_buffer[2048];
+    if(void_target_length < length) {
-    if(void_target_length < length)
         return false;
+    }
 
-    //TODO: Cache find_cipher
+    err = eax_decrypt_verify_memory(this->cipher_code,
-    err = eax_decrypt_verify_memory(find_cipher("rijndael"),
                                     (uint8_t *) key.data(), /* the key */
                                     (size_t)    key.size(), /* key is 16 bytes */
                                     (uint8_t *) nonce.data(), /* the nonce */
@@ -245,18 +251,16 @@ bool CryptHandler::verify_encryption(const pipes::buffer_view &packet, uint16_t
     return err == CRYPT_OK && success;
 }
 
-#define tmp_buffer_size (2048)
+bool CryptHandler::decrypt(const void *header, size_t header_length, void *payload, size_t payload_length, const void *mac, const key_t &key, const nonce_t &nonce, std::string &error) const {
-bool CryptHandler::decrypt(const void *header, size_t header_length, void *payload, size_t payload_length, const void *mac, const key_t &key, const nonce_t &nonce, std::string &error) {
+    const static unsigned long kTempBufferLength{2048};
-    if(tmp_buffer_size < payload_length) {
+    uint8_t tmp_buffer[kTempBufferLength];
-        error = "buffer too large";
+    if(kTempBufferLength < payload_length) {
+        error = "packet too large";
         return false;
     }
 
-    uint8_t tmp_buffer[tmp_buffer_size];
     int success;
-
+    auto err = eax_decrypt_verify_memory(this->cipher_code,
-    //TODO: Cache cipher
-    auto err = eax_decrypt_verify_memory(find_cipher("rijndael"),
                                     (const uint8_t *) key.data(), /* the key */
                                     (unsigned long)    key.size(), /* key is 16 bytes */
                                     (const uint8_t *) nonce.data(), /* the nonce */
@@ -289,17 +293,11 @@ bool CryptHandler::encrypt(
         void *payload, size_t payload_length,
         void *mac,
         const key_t &key, const nonce_t &nonce, std::string &error) {
-    if(tmp_buffer_size < payload_length) {
-        error = "buffer too large";
-        return false;
-    }
-
-    uint8_t tmp_buffer[tmp_buffer_size];
     size_t tag_length{8};
     uint8_t tag_buffer[16];
 
     static_assert(sizeof(unsigned long) <= sizeof(tag_length));
-    auto err = eax_encrypt_authenticate_memory(find_cipher("rijndael"),
+    auto err = eax_encrypt_authenticate_memory(this->cipher_code,
                                           (uint8_t *) key.data(), /* the key */
                                           (unsigned long)    key.size(), /* key is 16 bytes */
                                           (uint8_t *) nonce.data(), /* the nonce */
@@ -308,7 +306,7 @@ bool CryptHandler::encrypt(
                                           (unsigned long) header_length, /* header length */
                                           (uint8_t *) payload, /* The plain text */
                                           (unsigned long) payload_length, /* Plain text length */
-                                          (uint8_t *) tmp_buffer, /* The result buffer */
+                                          (uint8_t *) payload, /* The result buffer */
                                           (uint8_t *) tag_buffer,
                                           (unsigned long *)  &tag_length
     );
@@ -320,6 +318,5 @@ bool CryptHandler::encrypt(
     }
 
     memcpy(mac, tag_buffer, 8);
-    memcpy(payload, tmp_buffer, payload_length);
     return true;
 }

src/protocol/CryptHandler.h

@@ -8,20 +8,6 @@
 
 namespace ts::connection {
     class CryptHandler {
-        enum Methode {
-            TEAMSPEAK_3_1,
-            TEAMSPEAK_3
-        };
-        struct KeyCache {
-            uint16_t generation = 0xFFEF;
-            union {
-                struct {
-                    uint8_t key[16];
-                    uint8_t nonce[16];
-                };
-                uint8_t key_nonce[32];
-            };
-        };
         public:
             typedef std::array<uint8_t, 16> key_t;
             typedef std::array<uint8_t, 16> nonce_t;
@@ -31,58 +17,63 @@ namespace ts::connection {
             void reset();
 
             //TeamSpeak old
-            bool setupSharedSecret(const std::string& alpha, const std::string& beta, ecc_key* publicKey, ecc_key* ownKey, std::string &error);
+            bool setupSharedSecret(const std::string& /* alpha */, const std::string& /* beta */, ecc_key* /* remote_public_key */, ecc_key* /* own_private_key */, std::string &/* error */);
-            bool setupSharedSecret(const std::string& alpha, const std::string& beta, const std::string& sharedKey, std::string &error);
+            bool setupSharedSecret(const std::string& /* alpha */, const std::string& /* beta */, const std::string& /* shared_key */, std::string &/* error */);
 
             //TeamSpeak new
             bool setupSharedSecretNew(const std::string& alpha, const std::string& beta, const char privateKey[32], const char publicKey[32]);
 
-            /* mac must be 8 bytes long! */
             bool encrypt(
                     const void* /* header */, size_t /* header length */,
                     void* /* payload */, size_t /* payload length */,
-                    void* /* mac */,
+                    void* /* mac */, /* mac must be 8 bytes long! */
                     const key_t& /* key */, const nonce_t& /* nonce */,
                     std::string& /* error */);
 
-            /* mac must be 8 bytes long! */
             bool decrypt(
                     const void* /* header */, size_t /* header length */,
                     void* /* payload */, size_t /* payload length */,
-                    const void* /* mac */,
+                    const void* /* mac */, /* mac must be 8 bytes long! */
                     const key_t& /* key */, const nonce_t& /* nonce */,
-                    std::string& /* error */);
+                    std::string& /* error */) const;
 
             bool generate_key_nonce(bool /* to server */, uint8_t /* packet type */, uint16_t /* packet id */, uint16_t /* generation */, key_t& /* key */, nonce_t& /* nonce */);
-            bool verify_encryption(const pipes::buffer_view& data, uint16_t packet_id, uint16_t generation);
+            bool verify_encryption(const pipes::buffer_view& /* data */, uint16_t /* packet id */, uint16_t /* generation */);
 
             inline void write_default_mac(void* buffer) {
                 memcpy(buffer, this->current_mac, 8);
             }
 
-            [[nodiscard]] inline bool encryption_initialized() const { return !this->useDefaultChipherKeyNonce; }
+            [[nodiscard]] inline bool encryption_initialized() const { return !this->encryption_initialized_; }
 
             static constexpr key_t kDefaultKey{'c', ':', '\\', 'w', 'i', 'n', 'd', 'o', 'w', 's', '\\', 's', 'y', 's', 't', 'e'}; //c:\windows\syste
             static constexpr nonce_t kDefaultNonce{'m', '\\', 'f', 'i', 'r', 'e', 'w', 'a', 'l', 'l', '3', '2', '.', 'c', 'p', 'l'}; //m\firewall32.cpl
         private:
             static constexpr char default_mac[8] = {'T', 'S', '3', 'I', 'N', 'I', 'T', '1'}; //TS3INIT1
 
+            struct KeyCache {
+                uint16_t generation = 0xFFEF;
+                union {
+                    struct {
+                        uint8_t key[16];
+                        uint8_t nonce[16];
+                    };
+                    uint8_t key_nonce[32];
+                };
+            };
 
-            bool generate_key_nonce(protocol::BasicPacket* packet, bool use_default, uint8_t(&)[16] /* key */, uint8_t(&)[16] /* nonce */);
+            bool encryption_initialized_{false};
-
+            int cipher_code{-1};
-
-            //The default key and nonce
-            bool useDefaultChipherKeyNonce = true;
 
             /* for the old protocol SHA1 length for the new 64 bytes */
             uint8_t iv_struct[64];
-            uint8_t iv_struct_length = 0;
+            uint8_t iv_struct_length{0};
 
-            uint8_t current_mac[8];
+            uint8_t current_mac[8]{};
 
-            std::mutex cache_key_lock;
+            std::mutex cache_key_lock{};
-            std::array<KeyCache, protocol::PACKET_MAX> cache_key_client;
+            std::array<KeyCache, protocol::PACKET_MAX> cache_key_client{};
-            std::array<KeyCache, protocol::PACKET_MAX> cache_key_server;
+            std::array<KeyCache, protocol::PACKET_MAX> cache_key_server{};
 
             static_assert(sizeof(current_mac) == sizeof(default_mac), "invalid mac");
             static_assert(sizeof(iv_struct) == 64, "invalid iv struct");

src/protocol/Packet.cpp

@@ -3,236 +3,14 @@
 //
 
 #include <cstring>
-#include <iostream>
 #include <bitset>
-#include <src/misc/spin_mutex.h>
+#include "./Packet.h"
-#include "Packet.h"
+#include "../misc/endianness.h"
-#include "buffers.h"
+#include "../misc/spin_mutex.h"
-#include "misc/endianness.h"
 
 using namespace std;
 namespace ts {
     namespace protocol {
-
-        PacketTypeInfo::PacketTypeInfo(const std::string& name, PacketType type, bool ack, int max_length) noexcept {
-            this->data = new PacketTypeProperties{name, type, max_length, ack};
-            this->owns_data = true;
-
-            if(type < 0x0F)
-                types.insert({type, *this});
-        }
-
-        PacketTypeInfo::~PacketTypeInfo() {
-            if(this->owns_data)
-                delete this->data;
-        }
-
-        PacketTypeInfo::PacketTypeInfo(const PacketTypeInfo &red) : data(red.data) { }
-
-        std::map<int, PacketTypeInfo> PacketTypeInfo::types;
-        PacketTypeInfo PacketTypeInfo::fromid(int id) {
-            for(const auto& elm : types)
-                if(elm.first == id) return elm.second;
-            return PacketTypeInfo::Undefined;
-        }
-
-        PacketTypeInfo PacketTypeInfo::Voice = {"Voice", PacketType::VOICE, false, 1024};
-        PacketTypeInfo PacketTypeInfo::VoiceWhisper = {"VoiceWhisper", PacketType::VOICE_WHISPER, false, 1024};
-        PacketTypeInfo PacketTypeInfo::Command = {"Command", PacketType::COMMAND, true, 487};
-        PacketTypeInfo PacketTypeInfo::CommandLow = {"CommandLow", PacketType::COMMAND_LOW, true, 487};
-        PacketTypeInfo PacketTypeInfo::Ping = {"Ping", PacketType::PING, false, 1024};
-        PacketTypeInfo PacketTypeInfo::Pong = {"Pong", PacketType::PONG, false, 1024};
-        PacketTypeInfo PacketTypeInfo::Ack = {"Ack", PacketType::ACK, false, 1024};
-        PacketTypeInfo PacketTypeInfo::AckLow = {"AckLow", PacketType::ACK_LOW, false, 1024};
-        PacketTypeInfo PacketTypeInfo::Init1 = {"Init1", PacketType::INIT1, false, 1024};
-        PacketTypeInfo PacketTypeInfo::Undefined = {"Undefined", PacketType::UNDEFINED, false, 1024};
-
-        namespace PacketFlag {
-            std::string to_string(PacketFlag flag){
-                switch(flag){
-                    case Fragmented:
-                        return "Fragmented";
-                    case NewProtocol:
-                        return "NewProtocol";
-                    case Compressed:
-                        return "Compressed";
-                    case Unencrypted:
-                        return "Unencrypted";
-                    default:
-                        return "None";
-                }
-            }
-        }
-
-        BasicPacket::BasicPacket(size_t header_length, size_t data_length) {
-            this->_header_length = (uint8_t) header_length;
-            this->_buffer = pipes::buffer(MAC_SIZE + this->_header_length + data_length);
-            memset(this->_buffer.data_ptr(), 0, this->_buffer.length());
-        }
-
-        BasicPacket::~BasicPacket() {}
-
-        void BasicPacket::append_data(const std::vector<pipes::buffer> &data) {
-            size_t length = 0;
-            for(const auto& buffer : data)
-                length += buffer.length();
-
-            /* we've to allocate a new buffer because out buffer is fixed in size */
-            size_t index = this->_buffer.length();
-            auto new_buffer = buffer::allocate_buffer(length + index);
-            new_buffer.write(this->_buffer, index);
-
-            for(const auto& buffer : data) {
-                new_buffer.write(buffer, buffer.length(), index);
-                index += buffer.length();
-            }
-
-            this->_buffer = new_buffer;
-        }
-
-        std::string BasicPacket::flags() const {
-            std::string result;
-
-            if(this->has_flag(PacketFlag::Unencrypted))    result += string(result.empty() ? "" : " | ") + "Unencrypted";
-            if(this->has_flag(PacketFlag::Compressed))     result += string(result.empty() ? "" : " | ") + "Compressed";
-            if(this->has_flag(PacketFlag::Fragmented))     result += string(result.empty() ? "" : " | ") + "Fragmented";
-            if(this->has_flag(PacketFlag::NewProtocol))    result += string(result.empty() ? "" : " | ") + "NewProtocol";
-
-            if(result.empty()) result = "none";
-            return result;
-        }
-
-        void BasicPacket::applyPacketId(PacketIdManager& manager) {
-            this->applyPacketId(manager.nextPacketId(this->type()), manager.generationId(this->type()));
-        }
-        void BasicPacket::applyPacketId(uint16_t packetId, uint16_t generationId) {
-            if(this->memory_state.id_branded)
-                throw std::logic_error("Packet already got a packet id!");
-            this->memory_state.id_branded = true;
-            this->setPacketId(packetId, generationId);
-        }
-
-        /**
-         * @param buffer -> [mac][Header [uint16 BE packetId | [uint8](4bit flags | 4bit type)]][Data]
-         * @return
-         */
-        std::unique_ptr<ServerPacket> ServerPacket::from_buffer(const pipes::buffer_view &buffer) {
-            auto result = make_unique<ServerPacket>();
-
-            result->_buffer = buffer.own_buffer();
-            result->_header_length = SERVER_HEADER_SIZE;
-
-            return result;
-        }
-
-        ServerPacket::ServerPacket(uint8_t flagMask, const pipes::buffer_view& data) : BasicPacket(SERVER_HEADER_SIZE, data.length()) {
-            this->header()[2] = flagMask;
-            memcpy(this->data().data_ptr(), data.data_ptr(), data.length());
-        }
-
-        ServerPacket::ServerPacket(const PacketTypeInfo& type, const pipes::buffer_view& data) : BasicPacket(SERVER_HEADER_SIZE, data.length()) {
-            this->header()[2] |= (uint8_t) type.type();
-            memcpy(this->data().data_ptr(), data.data_ptr(), data.length());
-        }
-
-        ServerPacket::ServerPacket(ts::protocol::PacketTypeInfo type, size_t data_length) : BasicPacket(SERVER_HEADER_SIZE, data_length) {
-            this->header()[2] |= type.type();
-        }
-
-        ServerPacket::~ServerPacket() {}
-
-        uint16_t ServerPacket::packetId() const {
-            return be2le16(&this->header()[0]);
-        }
-
-        void ServerPacket::setPacketId(uint16_t pkId, uint16_t gen) {
-            le2be16(pkId, &this->header()[0]);
-            this->genId = gen;
-        }
-
-        uint16_t ServerPacket::generationId() const {
-            return this->genId;
-        }
-
-        PacketTypeInfo ServerPacket::type() const {
-            return PacketTypeInfo::fromid(this->header()[2] & 0xF);
-        }
-
-
-        std::unique_ptr<ClientPacket> ClientPacket::from_buffer(const pipes::buffer_view &buffer) {
-            auto result = make_unique<ClientPacket>();
-
-            result->_buffer = buffer.own_buffer();
-            result->_header_length = CLIENT_HEADER_SIZE;
-
-            return result;
-        }
-
-        ClientPacket::ClientPacket(const PacketTypeInfo &type, const pipes::buffer_view& data) : BasicPacket(CLIENT_HEADER_SIZE, data.length()) {
-            this->header()[4] = type.type() & 0xF;
-            memcpy(this->data().data_ptr(), data.data_ptr(), data.length());
-        }
-
-
-        ClientPacket::ClientPacket(const PacketTypeInfo &type, uint8_t flag_mask, const pipes::buffer_view& data) : ClientPacket(type, data) {
-            this->header()[4] |= flag_mask;
-        }
-
-        ClientPacket::~ClientPacket() {}
-
-        uint16_t ClientPacket::packetId() const {
-            return be2le16(&this->header()[0]);
-        }
-
-        uint16_t ClientPacket::generationId() const {
-            return this->genId;
-        }
-
-        PacketTypeInfo ClientPacket::type() const {
-            return PacketTypeInfo::fromid(this->header()[4] & 0xF);
-        }
-
-        void ClientPacket::type(const ts::protocol::PacketTypeInfo &type) {
-            auto& field = this->header().data_ptr<uint8_t>()[4];
-            field &= (uint8_t) ~0xF;
-            field |= type.type();
-        }
-
-        void ClientPacket::setPacketId(uint16_t pkId, uint16_t gen) {
-            this->header()[0] = (uint8_t) ((pkId >> 8) & 0xFF);
-            this->header()[1] = (uint8_t) ((pkId >> 0) & 0xFF);
-            this->genId = gen;
-        }
-
-        uint16_t ClientPacket::clientId() const {
-            return be2le16(&this->header()[2]);
-        }
-
-        void ClientPacket::clientId(uint16_t clId) {
-            this->header()[2] = clId >> 8;
-            this->header()[3] = clId & 0xFF;
-        }
-
-
-        /* New packet parser API */
-        bool PacketParser::is_encrypted() const {
-            if(this->decrypted) return false;
-
-            return (this->flags() & PacketFlag::Unencrypted) == 0;
-        }
-
-        bool PacketParser::is_compressed() const {
-            if(this->uncompressed) return false;
-
-            return (this->flags() & PacketFlag::Compressed) > 0;
-        }
-
-        bool PacketParser::is_fragmented() const {
-            if(this->defragmented) return false;
-
-            return (this->flags() & PacketFlag::Fragmented) > 0;
-        }
-
         uint16_t ClientPacketParser::packet_id() const { return be2le16(this->_buffer.data_ptr<uint8_t>(), ClientPacketParser::kHeaderOffset + 0); }
         uint16_t ClientPacketParser::client_id() const { return be2le16(this->_buffer.data_ptr<uint8_t>(), ClientPacketParser::kHeaderOffset + 2); }
         uint8_t ClientPacketParser::type() const { return (uint8_t) this->_buffer[ClientPacketParser::kHeaderOffset + 4] & 0xFU; }
@@ -361,7 +139,6 @@ namespace ts {
     }
 #else
     void protocol::OutgoingServerPacket::object_freed() {
-        //TODO: Bukkit list?
         deconstruct_osp(this);
         ::free(this);
     }

src/protocol/Packet.h

@@ -8,459 +8,249 @@
 #include <pipes/buffer.h>
 #include "../query/Command.h"
 
-namespace ts {
+namespace ts::protocol {
-    namespace protocol {
+    enum PacketType : uint8_t {
-        enum PacketType : uint8_t {
+        VOICE = 0x00,
-            VOICE = 0x00,
+        VOICE_WHISPER = 0x01,
-            VOICE_WHISPER = 0x01,
+        COMMAND = 0x02,
-            COMMAND = 0x02,
+        COMMAND_LOW = 0x03,
-            COMMAND_LOW = 0x03,
+        PING = 0x04,
-            PING = 0x04,
+        PONG = 0x05,
-            PONG = 0x05,
+        ACK = 0x06,
-            ACK = 0x06,
+        ACK_LOW = 0x07,
-            ACK_LOW = 0x07,
+        INIT1 = 0x08,
-            INIT1 = 0x08,
 
-            PACKET_MAX = INIT1,
+        PACKET_MAX = INIT1,
-            UNDEFINED = 0xFF
+        UNDEFINED = 0xFF
-        };
+    };
 
-        struct PacketTypeProperties {
+    class PacketIdManager {
-            std::string name;
+        public:
-            PacketType type;
+            PacketIdManager() = default;
-            int max_length;
+            ~PacketIdManager() = default;
-            bool requireAcknowledge;
+            PacketIdManager(const PacketIdManager& ref) = delete;
-        };
+            PacketIdManager(PacketIdManager&& ref) = delete;
 
-        class PacketTypeInfo {
+            [[nodiscard]] uint16_t nextPacketId(const PacketType &type) {
-            public:
+                return (uint16_t) (this->packet_counter[(uint8_t) type & 0xFU]++);
-                static PacketTypeInfo Voice;
+            }
-                static PacketTypeInfo VoiceWhisper;
-                static PacketTypeInfo Command;
-                static PacketTypeInfo CommandLow;
-                static PacketTypeInfo Ping;
-                static PacketTypeInfo Pong;
-                static PacketTypeInfo Ack;
-                static PacketTypeInfo AckLow;
-                static PacketTypeInfo Init1;
-                static PacketTypeInfo Undefined;
 
-                static PacketTypeInfo fromid(int id);
+            [[nodiscard]] uint16_t currentPacketId(const PacketType &type) {
+                return (uint16_t) (this->packet_counter[(uint8_t) type & 0xFU]);
+            }
 
-                std::string name() const { return data->name; }
+            [[nodiscard]] uint16_t generationId(const PacketType &type) {
-                PacketType type() const { return data->type; }
+                return (uint16_t) (this->packet_counter[(uint8_t) type & 0xFU] >> 16U);
+            }
 
-                bool requireAcknowledge(){ return data->requireAcknowledge; }
+            [[nodiscard]] uint32_t generate_full_id(const PacketType& type) {
+                return this->packet_counter[type]++;
+            }
 
-                bool operator==(const PacketTypeInfo& other) const {
+            void reset() {
-                    return other.data->type == this->data->type;
+                memset(&this->packet_counter[0], 0, sizeof(uint32_t) * 16);
-                }
+            }
 
-                bool operator!=(const PacketTypeInfo& other){
+        private:
-                    return other.data->type != this->data->type;
+            std::array<uint32_t, 16> packet_counter{};
-                }
+    };
 
-                int max_length() const { return data->max_length; }
+    enum struct PacketFlag {
-                inline bool fragmentable() { return *this == PacketTypeInfo::Command || *this == PacketTypeInfo::CommandLow; }
+        None = 0x00,
-                inline bool compressable() { return *this == PacketTypeInfo::Command || *this == PacketTypeInfo::CommandLow; }
+        Fragmented = 0x10,  //If packet type voice then its toggle the CELT Mono
+        NewProtocol = 0x20,
+        Compressed = 0x40,  //If packet type voice than its the header
+        Unencrypted = 0x80
+    };
+    typedef uint8_t PacketFlags;
 
-                PacketTypeInfo(const PacketTypeInfo&);
+    constexpr const char* packet_flag_to_string(const PacketFlag& flag) {
-                PacketTypeInfo(PacketTypeInfo&& remote) : data(remote.data) {}
+        switch(flag){
+            case PacketFlag::Fragmented:
+                return "Fragmented";
 
-                ~PacketTypeInfo();
+            case PacketFlag::NewProtocol:
-            private:
+                return "NewProtocol";
-                static std::map<int, PacketTypeInfo> types;
-                PacketTypeInfo(const std::string&, PacketType, bool, int) noexcept;
-                PacketTypeProperties* data;
-                bool owns_data = false;
-        };
 
-        class PacketIdManager {
+            case PacketFlag::Compressed:
-            public:
+                return "Compressed";
-                PacketIdManager() {
-                    this->reset();
-                }
 
-                ~PacketIdManager() = default;
+            case PacketFlag::Unencrypted:
-                PacketIdManager(const PacketIdManager& ref) = delete;
+                return "Unencrypted";
-                PacketIdManager(PacketIdManager&& ref) = delete;
 
-                [[nodiscard]] uint16_t nextPacketId(const PacketTypeInfo &type){
+            case PacketFlag::None:
-                    return static_cast<uint16_t>(this->packetCounter[type.type()]++ & 0xFFFF);
+            default:
-                }
+                return "None";
-
-                [[nodiscard]] uint16_t currentPacketId(const PacketTypeInfo &type){
-                    return static_cast<uint16_t>(this->packetCounter[type.type()] & 0xFFFF);
-                }
-
-                [[nodiscard]] uint16_t generationId(const PacketTypeInfo &type){
-                    return static_cast<uint16_t>((this->packetCounter[type.type()] >> 16) & 0xFFFF);
-                }
-
-                [[nodiscard]] uint32_t generate_full_id(const PacketType& type) {
-                    return this->packetCounter[type]++;
-                }
-
-                void reset() {
-                    memset(&this->packetCounter[0], 0, sizeof(uint32_t) * 16);
-                }
-            private:
-                uint32_t packetCounter[16]{};
-        };
-
-        namespace PacketFlag {
-            enum PacketFlag : uint8_t {
-                None = 0x00,
-                Fragmented = 0x10,  //If packet type voice then its toggle the CELT Mono
-                NewProtocol = 0x20,
-                Compressed = 0x40,  //If packet type voice than its the header
-                Unencrypted = 0x80
-            };
-            typedef uint8_t PacketFlags;
-
-            std::string to_string(PacketFlag flag);
         }
-
+    }
-        #define MAC_SIZE 8
+
-        #define SERVER_HEADER_SIZE 3
+    #define MAC_SIZE 8
-        #define CLIENT_HEADER_SIZE 5
+    #define SERVER_HEADER_SIZE 3
-
+    #define CLIENT_HEADER_SIZE 5
-        class BasicPacket {
+
-            public:
+    class PacketParser {
-                explicit BasicPacket(size_t header_length, size_t data_length);
+        public:
-                virtual ~BasicPacket();
+            PacketParser(const PacketParser&) = delete;
-
+            explicit PacketParser(pipes::buffer_view buffer) : _buffer{std::move(buffer)} {}
-                BasicPacket(const BasicPacket&) = delete;
+
-                BasicPacket(BasicPacket&&) = delete;
+            [[nodiscard]] inline const void* data_ptr() const { return this->_buffer.data_ptr(); }
-
+            [[nodiscard]] inline void* mutable_data_ptr() { return (void*) this->_buffer.data_ptr(); }
-                virtual uint16_t packetId() const = 0;
+
-                virtual uint16_t generationId() const = 0;
+            [[nodiscard]] inline pipes::buffer_view buffer() const { return this->_buffer; }
-                virtual PacketTypeInfo type() const = 0;
+            [[nodiscard]] inline pipes::buffer_view mac() const { return this->_buffer.view(0, 8); }
-
+            [[nodiscard]] virtual pipes::buffer_view payload() const = 0;
-                /* packet flag info */
+            [[nodiscard]] virtual size_t payload_length() const = 0;
-                inline bool has_flag(PacketFlag::PacketFlag flag) const { return this->_flags_type_byte() & flag; }
+
-                inline uint8_t flag_mask() const { return this->_flags_type_byte(); };
+            [[nodiscard]] inline uint32_t full_packet_id() const { return this->packet_id() | (uint32_t) ((uint32_t) this->estimated_generation() << 16U); }
-                [[nodiscard]] std::string flags() const;
+            [[nodiscard]] virtual uint16_t packet_id() const = 0;
-
+            [[nodiscard]] virtual uint8_t type() const = 0;
-                /* manipulate flags */
+            [[nodiscard]] virtual uint8_t flags() const = 0;
-                inline void set_flags(PacketFlag::PacketFlags flags) {
+
-                    uint8_t& byte = this->_flags_type_byte();
+            [[nodiscard]] inline bool has_flag(const PacketFlag& flag) const { return this->flags() & (uint8_t) flag; }
-                    byte &= 0xF; /* clear all flags */
+            [[nodiscard]] inline bool is_encrypted() const {
-                    byte |= (flags & 0xF0);
+                return !this->decrypted && !this->has_flag(PacketFlag::Unencrypted);
-                }
+            }
-                inline void enable_flag(PacketFlag::PacketFlag flag){ this->toggle_flag(flag, true); }
+
-                inline void toggle_flag(PacketFlag::PacketFlag flag, bool state) {
+            [[nodiscard]] inline bool is_compressed() const {
-                    if(state)
+                return !this->uncompressed && this->has_flag(PacketFlag::Compressed);
-                        this->_flags_type_byte() |= flag;
+            }
-                    else
+
-                        this->_flags_type_byte() &= (uint8_t) ~flag;
+            [[nodiscard]] inline bool is_fragmented() const {
-                }
+                return !this->defragmented && this->has_flag(PacketFlag::Fragmented);
-
+            }
-                virtual void applyPacketId(PacketIdManager &);
+
-                virtual void applyPacketId(uint16_t, uint16_t);
+            [[nodiscard]] uint16_t estimated_generation() const { return this->generation; }
-
+            void set_estimated_generation(uint16_t gen) { this->generation = gen; }
-                void setListener(std::unique_ptr<threads::Future<bool>> listener){
+
-                    if(!this->type().requireAcknowledge())
+            inline void set_decrypted() { this->decrypted = true; }
-                        throw std::logic_error("Packet type does not support a acknowledge listener!");
+            inline void set_uncompressed() { this->uncompressed = true; }
-                    this->listener = std::move(listener);
+            inline void set_defragmented() { this->defragmented = true; }
-                }
+
-                inline std::unique_ptr<threads::Future<bool>>& getListener() { return this->listener; }
+        protected:
-
+            uint16_t generation{};
-                inline size_t length() const { return this->_buffer.length(); }
+            bool decrypted{false}, uncompressed{false}, defragmented{false};
-                inline const pipes::buffer_view mac() const { return this->_buffer.view(0, MAC_SIZE); }
+            pipes::buffer_view _buffer{};
-                inline pipes::buffer mac() { return this->_buffer.range(0, MAC_SIZE); }
+    };
-                inline size_t mac_length() const { return MAC_SIZE; }
+
-
+    class ClientPacketParser : public PacketParser {
-                inline const pipes::buffer_view header() const { return this->_buffer.view(MAC_SIZE, this->_header_length); }
+        public:
-                inline pipes::buffer header() { return this->_buffer.range(MAC_SIZE, this->_header_length); }
+            constexpr static auto kHeaderOffset = 8;
-                inline size_t header_length() const { return this->_header_length; }
+            constexpr static auto kHeaderLength = CLIENT_HEADER_SIZE;
-
+
-                inline size_t data_length() const { return this->_buffer.length() - (MAC_SIZE + this->_header_length); }
+            constexpr static auto kPayloadOffset = kHeaderOffset + CLIENT_HEADER_SIZE;
-                inline const pipes::buffer_view data() const { return this->_buffer.view(MAC_SIZE + this->_header_length); }
+            explicit ClientPacketParser(pipes::buffer_view buffer) : PacketParser{std::move(buffer)} {}
-                inline pipes::buffer data() { return this->_buffer.range(MAC_SIZE + this->_header_length); }
+            ClientPacketParser(const ClientPacketParser&) = delete;
-
+
-                void append_data(const std::vector<pipes::buffer> &data);
+            [[nodiscard]] inline bool valid() const {
-
+                if(this->_buffer.length() < kPayloadOffset) return false;
-                inline void data(const pipes::buffer_view &data){
+                return this->type() <= 8;
-                    this->_buffer.resize(MAC_SIZE + this->_header_length + data.length());
+            }
-                    memcpy((char*) this->_buffer.data_ptr() + MAC_SIZE + this->_header_length, data.data_ptr(), data.length());
+
-                }
+            [[nodiscard]] inline pipes::buffer_view payload() const override { return this->_buffer.view(kPayloadOffset); }
-
+            [[nodiscard]] inline size_t payload_length() const override { return this->_buffer.length() - kPayloadOffset; }
-                inline void mac(const pipes::buffer_view  &_new){
+
-                    assert(_new.length() >= MAC_SIZE);
+            [[nodiscard]] uint16_t client_id() const;
-                    memcpy(this->_buffer.data_ptr(), _new.data_ptr(), MAC_SIZE);
+            [[nodiscard]] uint16_t packet_id() const override;
-                }
+            [[nodiscard]] uint8_t type() const override;
-
+            [[nodiscard]] uint8_t flags() const override;
-                [[nodiscard]] inline bool isEncrypted() const { return this->memory_state.encrypted; }
+    };
-                inline void setEncrypted(bool flag){ this->memory_state.encrypted = flag; }
+
-
+    class ServerPacketParser : public PacketParser {
-                [[nodiscard]] inline bool isCompressed() const { return this->memory_state.compressed; }
+        public:
-                inline void setCompressed(bool flag){ this->memory_state.compressed = flag; }
+            constexpr static auto kHeaderOffset = 8;
-
+            constexpr static auto kHeaderLength = SERVER_HEADER_SIZE;
-                [[nodiscard]] inline bool isFragmentEntry() const { return this->memory_state.fragment_entry; }
+
-                inline void setFragmentedEntry(bool flag){ this->memory_state.fragment_entry = flag; }
+            constexpr static auto kPayloadOffset = kHeaderOffset + SERVER_HEADER_SIZE;
-
+
-                Command asCommand();
+            explicit ServerPacketParser(pipes::buffer_view buffer) : PacketParser{std::move(buffer)} {}
-
+            ServerPacketParser(const ServerPacketParser&) = delete;
-                //Has the size of a byte
+
-                union {
+            [[nodiscard]] inline bool valid() const {
-#ifdef WIN32
+                if(this->_buffer.length() < kPayloadOffset) return false;
-                    __pragma(pack(push, 1))
+                return this->type() <= 8;
-#endif
+            }
-                    struct {
+
-                        bool encrypted: 1;
+            [[nodiscard]] inline pipes::buffer_view payload() const override { return this->_buffer.view(kPayloadOffset); }
-                        bool compressed: 1;
+            [[nodiscard]] inline size_t payload_length() const override { return this->_buffer.length() - kPayloadOffset; }
-                        bool fragment_entry: 1;
+
-
+            [[nodiscard]] uint16_t packet_id() const override;
-                        bool id_branded: 1;
+            [[nodiscard]] uint8_t type() const override;
-                    }
+            [[nodiscard]] uint8_t flags() const override;
-#ifdef WIN32
+    };
-                    __pragma(pack(pop));
+
-#else
+    struct OutgoingServerPacket {
-                    __attribute__((packed));
+        public:
-#endif
+            /* general info */
-
+            std::atomic<uint16_t> ref_count;
-                    uint8_t flags = 0;
+            size_t payload_size;
-                } memory_state;
+
-
+            OutgoingServerPacket* next; /* used within the write/process queue */
-                pipes::buffer buffer() { return this->_buffer; }
+            uint16_t generation;
-                void buffer(pipes::buffer buffer) {
+
-                    assert(buffer.length() >= this->_header_length + MAC_SIZE);
+            /* actual packet data */
-                    this->_buffer = std::move(buffer);
+            uint8_t mac[8];
-                }
+            uint8_t packet_id_bytes[2];
-            protected:
+            uint8_t type_and_flags;
-                BasicPacket() = default;
+            uint8_t payload[1]; /* variable size */
-
+
-                virtual const uint8_t& _flags_type_byte() const = 0;
+            [[nodiscard]] inline const void* packet_data() const {
-                virtual uint8_t& _flags_type_byte() = 0;
+                return this->mac;
-
+            }
-                virtual void setPacketId(uint16_t, uint16_t) = 0;
+
-                uint8_t _header_length;
+            [[nodiscard]] inline size_t packet_length() const {
-                pipes::buffer _buffer;
+                return this->payload_size + (8 + 2 + 1);
-
+            }
-                uint16_t genId = 0;
+
-                std::unique_ptr<threads::Future<bool>> listener;
+            inline auto ref() {
-        };
+                auto count = ++ref_count;
-
+                assert(count > 1);
-
+                return count;
-        /**
+            }
-         * Packet from the client
+
-         */
+            inline void unref() {
-        class ClientPacket : public BasicPacket {
+                if(--this->ref_count == 0)
-                friend std::unique_ptr<ClientPacket> std::make_unique<ClientPacket>();
+                    this->object_freed();
-            public:
+            }
-                static constexpr size_t META_MAC_SIZE = 8;
+
-                static constexpr size_t META_HEADER_SIZE = CLIENT_HEADER_SIZE;
+            /* some helper methods */
-                static constexpr size_t META_SIZE = META_MAC_SIZE + META_HEADER_SIZE;
+            inline void set_packet_id(uint16_t id) {
-
+                this->packet_id_bytes[0] = id >> 8U;
-                [[nodiscard]] static std::unique_ptr<ClientPacket> from_buffer(const pipes::buffer_view& buffer);
+                this->packet_id_bytes[1] = id & 0xFFU;
-
+            }
-                ClientPacket(const PacketTypeInfo& type, const pipes::buffer_view& data);
+
-                ClientPacket(const PacketTypeInfo& type, uint8_t flag_mask, const pipes::buffer_view& data);
+            [[nodiscard]] inline uint16_t packet_id() const {
-                ~ClientPacket() override;
+                return (uint16_t) (this->packet_id_bytes[0] << 8U) | this->packet_id_bytes[1];
-                ClientPacket(const ClientPacket&) = delete;
+            }
-                ClientPacket(ClientPacket&&) = delete;
+
-
+            [[nodiscard]] inline auto packet_type() const {
-                uint16_t clientId() const;
+                return (PacketType) (this->type_and_flags & 0xFU);
-                void clientId(uint16_t);
+            }
-
+        private:
-                uint16_t packetId() const override;
+            void object_freed();
-
+    };
-                uint16_t generationId() const override;
+
-                void generationId(uint16_t generation) { this->genId = generation; }
+    /* This will allocate a new outgoing packet. To delete just unref the packet! */
-
+    OutgoingServerPacket* allocate_outgoing_packet(size_t /* payload size */);
-                PacketTypeInfo type() const override;
+
-                void type(const PacketTypeInfo&);
+    inline PacketFlags& operator|=(PacketFlags& flags, const PacketFlag& flag) {
-
+        flags |= (uint8_t) flag;
-            private:
+        return flags;
-                ClientPacket() = default;
+    }
-
+
-                const uint8_t &_flags_type_byte() const override {
+    inline PacketFlags operator|(PacketFlags flags, const PacketFlag& flag) {
-                    return this->header().data_ptr<uint8_t>()[4];
+        return flags |= flag;
-                }
+    }
-
+
-                uint8_t &_flags_type_byte() override {
+    inline PacketFlags& operator&=(PacketFlags& flags, const PacketFlag& flag) {
-                    return this->header().data_ptr<uint8_t>()[4];
+        flags &= (uint8_t) flag;
-                }
+        return flags;
-
+    }
-                void setPacketId(uint16_t, uint16_t) override;
+
-        };
+    inline PacketFlags operator&(PacketFlags flags, const PacketFlag& flag) {
-
+        return flags &= flag;
-        class PacketParser {
+    }
-            public:
+
-                PacketParser(const PacketParser&) = delete;
+    inline PacketFlags operator|(const PacketFlag& flag_a, const PacketFlag& flag_b) {
-                explicit PacketParser(pipes::buffer_view buffer) : _buffer{std::move(buffer)} {}
+        return (uint8_t) flag_a | (uint8_t) flag_b;
-
-                [[nodiscard]] inline const void* data_ptr() const { return this->_buffer.data_ptr(); }
-                [[nodiscard]] inline void* mutable_data_ptr() { return (void*) this->_buffer.data_ptr(); }
-
-                [[nodiscard]] inline pipes::buffer_view buffer() const { return this->_buffer; }
-                [[nodiscard]] inline pipes::buffer_view mac() const { return this->_buffer.view(0, 8); }
-                [[nodiscard]] virtual pipes::buffer_view payload() const = 0;
-                [[nodiscard]] virtual size_t payload_length() const = 0;
-
-                [[nodiscard]] inline uint32_t full_packet_id() const { return this->packet_id() | (this->estimated_generation() << 16U); }
-                [[nodiscard]] virtual uint16_t packet_id() const = 0;
-                [[nodiscard]] virtual uint8_t type() const = 0;
-                [[nodiscard]] virtual uint8_t flags() const = 0;
-
-                [[nodiscard]] bool is_encrypted() const;
-                [[nodiscard]] bool is_compressed() const;
-                [[nodiscard]] bool is_fragmented() const;
-
-                [[nodiscard]] uint16_t estimated_generation() const { return this->generation; }
-                void set_estimated_generation(uint16_t gen) { this->generation = gen; }
-
-                inline void set_decrypted() { this->decrypted = true; }
-                inline void set_uncompressed() { this->uncompressed = true; }
-                inline void set_defragmented() { this->defragmented = true; }
-
-            protected:
-                uint16_t generation{};
-                bool decrypted{false}, uncompressed{false}, defragmented{false};
-                pipes::buffer_view _buffer{};
-        };
-
-        class ClientPacketParser : public PacketParser {
-            public:
-                constexpr static auto kHeaderOffset = 8;
-                constexpr static auto kHeaderLength = CLIENT_HEADER_SIZE;
-
-                constexpr static auto kPayloadOffset = kHeaderOffset + CLIENT_HEADER_SIZE;
-                explicit ClientPacketParser(pipes::buffer_view buffer) : PacketParser{std::move(buffer)} {}
-                ClientPacketParser(const ClientPacketParser&) = delete;
-
-                [[nodiscard]] inline bool valid() const {
-                    if(this->_buffer.length() < kPayloadOffset) return false;
-                    return this->type() <= 8;
-                }
-
-                [[nodiscard]] inline pipes::buffer_view payload() const override { return this->_buffer.view(kPayloadOffset); }
-                [[nodiscard]] inline size_t payload_length() const override { return this->_buffer.length() - kPayloadOffset; }
-
-                [[nodiscard]] uint16_t client_id() const;
-                [[nodiscard]] uint16_t packet_id() const override;
-                [[nodiscard]] uint8_t type() const override;
-                [[nodiscard]] uint8_t flags() const override;
-        };
-
-        /**
-         * Packet from the server
-         */
-        class ServerPacket : public BasicPacket {
-                friend std::unique_ptr<ServerPacket> std::make_unique<ServerPacket>();
-            public:
-                static constexpr size_t META_MAC_SIZE = 8;
-                static constexpr size_t META_HEADER_SIZE = SERVER_HEADER_SIZE;
-                static constexpr size_t META_SIZE = META_MAC_SIZE + META_HEADER_SIZE;
-
-                [[nodiscard]] static std::unique_ptr<ServerPacket> from_buffer(const pipes::buffer_view& buffer);
-
-                ServerPacket(uint8_t flagMask, const pipes::buffer_view& data);
-                ServerPacket(const PacketTypeInfo& type, const pipes::buffer_view& data);
-                ServerPacket(PacketTypeInfo type, size_t /* data length */);
-                ~ServerPacket() override;
-
-                ServerPacket(const ServerPacket&) = delete;
-                ServerPacket(ServerPacket&&) = delete;
-
-                [[nodiscard]] uint16_t packetId() const override;
-                [[nodiscard]] uint16_t generationId() const override;
-                void generationId(uint16_t generation) { this->genId = generation; }
-                [[nodiscard]] PacketTypeInfo type() const override;
-
-            private:
-                ServerPacket() = default;
-
-                [[nodiscard]] const uint8_t &_flags_type_byte() const override {
-                    return this->header().data_ptr<uint8_t>()[2];
-                }
-
-                uint8_t &_flags_type_byte() override {
-                    return this->header().data_ptr<uint8_t>()[2];
-                }
-
-                void setPacketId(uint16_t, uint16_t) override;
-        };
-
-        class ServerPacketP {
-            public:
-                constexpr static auto kHeaderOffset = 8;
-                constexpr static auto kHeaderLength = SERVER_HEADER_SIZE;
-
-                constexpr static auto kPayloadOffset = kHeaderOffset + SERVER_HEADER_SIZE;
-        };
-
-        class ServerPacketParser : public PacketParser, public ServerPacketP {
-            public:
-                explicit ServerPacketParser(pipes::buffer_view buffer) : PacketParser{std::move(buffer)} {}
-                ServerPacketParser(const ServerPacketParser&) = delete;
-
-                [[nodiscard]] inline bool valid() const {
-                    if(this->_buffer.length() < kPayloadOffset) return false;
-                    return this->type() <= 8;
-                }
-
-                [[nodiscard]] inline pipes::buffer_view payload() const override { return this->_buffer.view(kPayloadOffset); }
-                [[nodiscard]] inline size_t payload_length() const override { return this->_buffer.length() - kPayloadOffset; }
-
-                [[nodiscard]] uint16_t packet_id() const override;
-                [[nodiscard]] uint8_t type() const override;
-                [[nodiscard]] uint8_t flags() const override;
-        };
-
-        struct OutgoingServerPacket {
-            public:
-                /* general info */
-                std::atomic<uint16_t> ref_count;
-                size_t payload_size;
-
-                OutgoingServerPacket* next; /* used within the write/process queue */
-                uint16_t generation;
-
-                /* actual packet data */
-                uint8_t mac[8];
-                uint8_t packet_id_bytes[2];
-                uint8_t type_and_flags;
-                uint8_t payload[1]; /* variable size */
-
-                [[nodiscard]] inline const void* packet_data() const {
-                    return this->mac;
-                }
-
-                [[nodiscard]] inline size_t packet_length() const {
-                    return this->payload_size + (8 + 2 + 1);
-                }
-
-                inline auto ref() {
-                    auto count = ++ref_count;
-                    assert(count > 1);
-                    return count;
-                }
-
-                inline void unref() {
-                    if(--this->ref_count == 0)
-                        this->object_freed();
-                }
-
-                /* some helper methods */
-                inline void set_packet_id(uint16_t id) {
-                    this->packet_id_bytes[0] = id >> 8U;
-                    this->packet_id_bytes[1] = id & 0xFFU;
-                }
-
-                [[nodiscard]] inline uint16_t packet_id() const {
-                    return (uint16_t) (this->packet_id_bytes[0] << 8U) | this->packet_id_bytes[1];
-                }
-
-                [[nodiscard]] inline auto packet_type() const {
-                    return (PacketType) (this->type_and_flags & 0xFU);
-                }
-            private:
-                void object_freed();
-        };
-
-        /* This will allocate a new outgoing packet. To delete just unref the packet! */
-        OutgoingServerPacket* allocate_outgoing_packet(size_t /* payload size */);
     }
 }

src/protocol/generation.cpp

@@ -2,22 +2,22 @@
 
 using namespace ts::protocol;
 
-generation_estimator::generation_estimator() {
+GenerationEstimator::GenerationEstimator() {
     this->reset();
 }
 
-void generation_estimator::reset() {
+void GenerationEstimator::reset() {
     this->last_generation = 0;
     this->last_packet_id = 0;
 }
 
-uint16_t generation_estimator::visit_packet(uint16_t packet_id) {
+uint16_t GenerationEstimator::visit_packet(uint16_t packet_id) {
-    if(this->last_packet_id >= generation_estimator::overflow_area_begin) {
+    if(this->last_packet_id >= GenerationEstimator::overflow_area_begin) {
         if(packet_id > this->last_packet_id) {
             /* normal behaviour */
             this->last_packet_id = packet_id;
             return this->last_generation;
-        } else if(packet_id < generation_estimator::overflow_area_end) {
+        } else if(packet_id < GenerationEstimator::overflow_area_end) {
             /* we're within a new generation */
             this->last_packet_id = packet_id;
             return ++this->last_generation;
@@ -25,8 +25,8 @@ uint16_t generation_estimator::visit_packet(uint16_t packet_id) {
             /* old packet */
             return this->last_generation;
         }
-    } else if(this->last_packet_id <= generation_estimator::overflow_area_end) {
+    } else if(this->last_packet_id <= GenerationEstimator::overflow_area_end) {
-        if(packet_id >= generation_estimator::overflow_area_begin) /* old packet */
+        if(packet_id >= GenerationEstimator::overflow_area_begin) /* old packet */
             return this->last_generation - 1;
         if(packet_id > this->last_packet_id)
             this->last_packet_id = packet_id;

src/protocol/generation.h

@@ -3,9 +3,9 @@
 #include <cstdint>
 
 namespace ts::protocol {
-    class generation_estimator {
+    class GenerationEstimator {
         public:
-            generation_estimator();
+            GenerationEstimator();
 
             void reset();
             [[nodiscard]] uint16_t visit_packet(uint16_t /* packet id */);

src/qlz/QuickLZ.cpp

@@ -9,7 +9,7 @@
 
 // 1.5.0 final
 
-#include "QuickLZ.h"
+#include "./QuickLZ.h"
 
 #if QLZ_VERSION_MAJOR != 1 || QLZ_VERSION_MINOR != 5 || QLZ_VERSION_REVISION != 0
 #error quicklz.c and quicklz.h have different versions
@@ -19,8 +19,829 @@
 #define X86X64
 #endif
 
+#define MINOFFSET 2
+#define UNCONDITIONAL_MATCHLEN 6
+#define UNCOMPRESSED_END 4
+#define CWORD_LEN 4
+
+#if QLZ_COMPRESSION_LEVEL == 1 && defined QLZ_PTR_64 && QLZ_STREAMING_BUFFER == 0
+#define OFFSET_BASE source
+#define CAST (ui32)(size_t)
+#else
+#define OFFSET_BASE 0
+	#define CAST
+#endif
+
+int qlz_get_setting(int setting)
+{
+    switch (setting)
+    {
+        case 0: return QLZ_COMPRESSION_LEVEL;
+        case 1: return sizeof(qlz_state_compress);
+        case 2: return sizeof(qlz_state_decompress);
+        case 3: return QLZ_STREAMING_BUFFER;
+#ifdef QLZ_MEMORY_SAFE
+        case 6: return 1;
+#else
+            case 6: return 0;
+#endif
+        case 7: return QLZ_VERSION_MAJOR;
+        case 8: return QLZ_VERSION_MINOR;
+        case 9: return QLZ_VERSION_REVISION;
+    }
+    return -1;
+}
+
+#if QLZ_COMPRESSION_LEVEL == 1
+static int same(const unsigned char *src, size_t n)
+{
+    while(n > 0 && *(src + n) == *src)
+        n--;
+    return n == 0 ? 1 : 0;
+}
+#endif
+
+static void reset_table_compress(qlz_state_compress *state)
+{
+    int i;
+    for(i = 0; i < QLZ_HASH_VALUES; i++)
+    {
+#if QLZ_COMPRESSION_LEVEL == 1
+        state->hash[i].offset = 0;
+#else
+        state->hash_counter[i] = 0;
+#endif
+    }
+}
+
+static void reset_table_decompress(qlz_state_decompress *state)
+{
+    int i;
+    (void)state;
+    (void)i;
+#if QLZ_COMPRESSION_LEVEL == 2
+    for(i = 0; i < QLZ_HASH_VALUES; i++)
+	{
+		state->hash_counter[i] = 0;
+	}
+#endif
+}
+
+static __inline ui32 hash_func(ui32 i)
+{
+#if QLZ_COMPRESSION_LEVEL == 2
+    return ((i >> 9) ^ (i >> 13) ^ i) & (QLZ_HASH_VALUES - 1);
+#else
+    return ((i >> 12) ^ i) & (QLZ_HASH_VALUES - 1);
+#endif
+}
+
+static __inline ui32 fast_read(void const *src, ui32 bytes)
+{
+#ifndef X86X64
+    unsigned char *p = (unsigned char*)src;
+	switch (bytes)
+	{
+		case 4:
+			return(*p | *(p + 1) << 8 | *(p + 2) << 16 | *(p + 3) << 24);
+		case 3:
+			return(*p | *(p + 1) << 8 | *(p + 2) << 16);
+		case 2:
+			return(*p | *(p + 1) << 8);
+		case 1:
+			return(*p);
+	}
+	return 0;
+#else
+    if (bytes >= 1 && bytes <= 4)
+        return *((ui32*)src);
+    else
+        return 0;
+#endif
+}
+
+static __inline ui32 hashat(const unsigned char *src)
+{
+    ui32 fetch, hash;
+    fetch = fast_read(src, 3);
+    hash = hash_func(fetch);
+    return hash;
+}
+
+static __inline void fast_write(ui32 f, void *dst, size_t bytes)
+{
+#ifndef X86X64
+    unsigned char *p = (unsigned char*)dst;
+
+	switch (bytes)
+	{
+		case 4:
+			*p = (unsigned char)f;
+			*(p + 1) = (unsigned char)(f >> 8);
+			*(p + 2) = (unsigned char)(f >> 16);
+			*(p + 3) = (unsigned char)(f >> 24);
+			return;
+		case 3:
+			*p = (unsigned char)f;
+			*(p + 1) = (unsigned char)(f >> 8);
+			*(p + 2) = (unsigned char)(f >> 16);
+			return;
+		case 2:
+			*p = (unsigned char)f;
+			*(p + 1) = (unsigned char)(f >> 8);
+			return;
+		case 1:
+			*p = (unsigned char)f;
+			return;
+	}
+#else
+    switch (bytes)
+    {
+        case 4:
+            *((ui32*)dst) = f;
+            return;
+        case 3:
+            *((ui32*)dst) = f;
+            return;
+        case 2:
+            *((ui16 *)dst) = (ui16)f;
+            return;
+        case 1:
+            *((unsigned char*)dst) = (unsigned char)f;
+            return;
+    }
+#endif
+}
+
+
+size_t qlz_size_decompressed(const char *source)
+{
+    ui32 n, r;
+    n = (((*source) & 2) == 2) ? 4 : 1;
+    r = fast_read(source + 1 + n, n);
+    r = r & (0xffffffff >> ((4 - n)*8));
+    return r;
+}
+
+size_t qlz_size_compressed(const char *source)
+{
+    ui32 n, r;
+    n = (((*source) & 2) == 2) ? 4 : 1;
+    r = fast_read(source + 1, n);
+    r = r & (0xffffffff >> ((4 - n)*8));
+    return r;
+}
+
 size_t qlz_size_header(const char *source)
 {
     size_t n = 2*((((*source) & 2) == 2) ? 4 : 1) + 1;
     return n;
-}
+}
+
+
+static __inline void memcpy_up(unsigned char *dst, const unsigned char *src, ui32 n)
+{
+    // Caution if modifying memcpy_up! Overlap of dst and src must be special handled.
+#ifndef X86X64
+    unsigned char *end = dst + n;
+	while(dst < end)
+	{
+		*dst = *src;
+		dst++;
+		src++;
+	}
+#else
+    ui32 f = 0;
+    do
+    {
+        *(ui32 *)(dst + f) = *(ui32 *)(src + f);
+        f += MINOFFSET + 1;
+    }
+    while (f < n);
+#endif
+}
+
+static __inline void update_hash(qlz_state_decompress *state, const unsigned char *s)
+{
+#if QLZ_COMPRESSION_LEVEL == 1
+    ui32 hash;
+    hash = hashat(s);
+    state->hash[hash].offset = s;
+    state->hash_counter[hash] = 1;
+#elif QLZ_COMPRESSION_LEVEL == 2
+    ui32 hash;
+	unsigned char c;
+	hash = hashat(s);
+	c = state->hash_counter[hash];
+	state->hash[hash].offset[c & (QLZ_POINTERS - 1)] = s;
+	c++;
+	state->hash_counter[hash] = c;
+#endif
+    (void)state;
+    (void)s;
+}
+
+#if QLZ_COMPRESSION_LEVEL <= 2
+static void update_hash_upto(qlz_state_decompress *state, unsigned char **lh, const unsigned char *max)
+{
+    while(*lh < max)
+    {
+        (*lh)++;
+        update_hash(state, *lh);
+    }
+}
+#endif
+
+static size_t qlz_compress_core(const unsigned char *source, unsigned char *destination, size_t size, qlz_state_compress *state)
+{
+    const unsigned char *last_byte = source + size - 1;
+    const unsigned char *src = source;
+    unsigned char *cword_ptr = destination;
+    unsigned char *dst = destination + CWORD_LEN;
+    ui32 cword_val = 1U << 31;
+    const unsigned char *last_matchstart = last_byte - UNCONDITIONAL_MATCHLEN - UNCOMPRESSED_END;
+    ui32 fetch = 0;
+    unsigned int lits = 0;
+
+    (void) lits;
+
+    if(src <= last_matchstart)
+        fetch = fast_read(src, 3);
+
+    while(src <= last_matchstart)
+    {
+        if ((cword_val & 1) == 1)
+        {
+            // store uncompressed if compression ratio is too low
+            if (src > source + (size >> 1) && dst - destination > src - source - ((src - source) >> 5))
+                return 0;
+
+            fast_write((cword_val >> 1) | (1U << 31), cword_ptr, CWORD_LEN);
+
+            cword_ptr = dst;
+            dst += CWORD_LEN;
+            cword_val = 1U << 31;
+            fetch = fast_read(src, 3);
+        }
+#if QLZ_COMPRESSION_LEVEL == 1
+        {
+            const unsigned char *o;
+            ui32 hash, cached;
+
+            hash = hash_func(fetch);
+            cached = fetch ^ state->hash[hash].cache;
+            state->hash[hash].cache = fetch;
+
+            o = state->hash[hash].offset + OFFSET_BASE;
+            state->hash[hash].offset = CAST(src - OFFSET_BASE);
+
+#ifdef X86X64
+            if ((cached & 0xffffff) == 0 && o != OFFSET_BASE && (src - o > MINOFFSET || (src == o + 1 && lits >= 3 && src > source + 3 && same(src - 3, 6))))
+            {
+                if(cached != 0)
+                {
+#else
+                    if (cached == 0 && o != OFFSET_BASE && (src - o > MINOFFSET || (src == o + 1 && lits >= 3 && src > source + 3 && same(src - 3, 6))))
+			{
+				if (*(o + 3) != *(src + 3))
+				{
+#endif
+                    hash <<= 4;
+                    cword_val = (cword_val >> 1) | (1U << 31);
+                    fast_write((3 - 2) | hash, dst, 2);
+                    src += 3;
+                    dst += 2;
+                }
+                else
+                {
+                    const unsigned char *old_src = src;
+                    size_t matchlen;
+                    hash <<= 4;
+
+                    cword_val = (cword_val >> 1) | (1U << 31);
+                    src += 4;
+
+                    if(*(o + (src - old_src)) == *src)
+                    {
+                        src++;
+                        if(*(o + (src - old_src)) == *src)
+                        {
+                            size_t q = last_byte - UNCOMPRESSED_END - (src - 5) + 1;
+                            size_t remaining = q > 255 ? 255 : q;
+                            src++;
+                            while(*(o + (src - old_src)) == *src && (size_t)(src - old_src) < remaining)
+                                src++;
+                        }
+                    }
+
+                    matchlen = src - old_src;
+                    if (matchlen < 18)
+                    {
+                        fast_write((ui32)(matchlen - 2) | hash, dst, 2);
+                        dst += 2;
+                    }
+                    else
+                    {
+                        fast_write((ui32)(matchlen << 16) | hash, dst, 3);
+                        dst += 3;
+                    }
+                }
+                fetch = fast_read(src, 3);
+                lits = 0;
+            }
+            else
+            {
+                lits++;
+                *dst = *src;
+                src++;
+                dst++;
+                cword_val = (cword_val >> 1);
+#ifdef X86X64
+                fetch = fast_read(src, 3);
+#else
+                fetch = (fetch >> 8 & 0xffff) | (*(src + 2) << 16);
+#endif
+            }
+        }
+#elif QLZ_COMPRESSION_LEVEL >= 2
+        {
+			const unsigned char *o, *offset2;
+			ui32 hash, matchlen, k, m, best_k = 0;
+			unsigned char c;
+			size_t remaining = (last_byte - UNCOMPRESSED_END - src + 1) > 255 ? 255 : (last_byte - UNCOMPRESSED_END - src + 1);
+			(void)best_k;
+
+
+			//hash = hashat(src);
+			fetch = fast_read(src, 3);
+			hash = hash_func(fetch);
+
+			c = state->hash_counter[hash];
+
+			offset2 = state->hash[hash].offset[0];
+			if(offset2 < src - MINOFFSET && c > 0 && ((fast_read(offset2, 3) ^ fetch) & 0xffffff) == 0)
+			{
+				matchlen = 3;
+				if(*(offset2 + matchlen) == *(src + matchlen))
+				{
+					matchlen = 4;
+					while(*(offset2 + matchlen) == *(src + matchlen) && matchlen < remaining)
+						matchlen++;
+				}
+			}
+			else
+				matchlen = 0;
+			for(k = 1; k < QLZ_POINTERS && c > k; k++)
+			{
+				o = state->hash[hash].offset[k];
+#if QLZ_COMPRESSION_LEVEL == 3
+				if(((fast_read(o, 3) ^ fetch) & 0xffffff) == 0 && o < src - MINOFFSET)
+#elif QLZ_COMPRESSION_LEVEL == 2
+				if(*(src + matchlen) == *(o + matchlen)	&& ((fast_read(o, 3) ^ fetch) & 0xffffff) == 0 && o < src - MINOFFSET)
+#endif
+				{
+					m = 3;
+					while(*(o + m) == *(src + m) && m < remaining)
+						m++;
+#if QLZ_COMPRESSION_LEVEL == 3
+					if ((m > matchlen) || (m == matchlen && o > offset2))
+#elif QLZ_COMPRESSION_LEVEL == 2
+					if (m > matchlen)
+#endif
+					{
+						offset2 = o;
+						matchlen = m;
+						best_k = k;
+					}
+				}
+			}
+			o = offset2;
+			state->hash[hash].offset[c & (QLZ_POINTERS - 1)] = src;
+			c++;
+			state->hash_counter[hash] = c;
+
+#if QLZ_COMPRESSION_LEVEL == 3
+			if(matchlen > 2 && src - o < 131071)
+			{
+				ui32 u;
+				size_t offset = src - o;
+
+				for(u = 1; u < matchlen; u++)
+				{
+					hash = hashat(src + u);
+					c = state->hash_counter[hash]++;
+					state->hash[hash].offset[c & (QLZ_POINTERS - 1)] = src + u;
+				}
+
+				cword_val = (cword_val >> 1) | (1U << 31);
+				src += matchlen;
+
+				if(matchlen == 3 && offset <= 63)
+				{
+					*dst = (unsigned char)(offset << 2);
+					dst++;
+				}
+				else if (matchlen == 3 && offset <= 16383)
+				{
+					ui32 f = (ui32)((offset << 2) | 1);
+					fast_write(f, dst, 2);
+					dst += 2;
+				}
+				else if (matchlen <= 18 && offset <= 1023)
+				{
+					ui32 f = ((matchlen - 3) << 2) | ((ui32)offset << 6) | 2;
+					fast_write(f, dst, 2);
+					dst += 2;
+				}
+
+				else if(matchlen <= 33)
+				{
+					ui32 f = ((matchlen - 2) << 2) | ((ui32)offset << 7) | 3;
+					fast_write(f, dst, 3);
+					dst += 3;
+				}
+				else
+				{
+					ui32 f = ((matchlen - 3) << 7) | ((ui32)offset << 15) | 3;
+					fast_write(f, dst, 4);
+					dst += 4;
+				}
+			}
+			else
+			{
+				*dst = *src;
+				src++;
+				dst++;
+				cword_val = (cword_val >> 1);
+			}
+#elif QLZ_COMPRESSION_LEVEL == 2
+
+			if(matchlen > 2)
+			{
+				cword_val = (cword_val >> 1) | (1U << 31);
+				src += matchlen;
+
+				if (matchlen < 10)
+				{
+					ui32 f = best_k | ((matchlen - 2) << 2) | (hash << 5);
+					fast_write(f, dst, 2);
+					dst += 2;
+				}
+				else
+				{
+					ui32 f = best_k | (matchlen << 16) | (hash << 5);
+					fast_write(f, dst, 3);
+					dst += 3;
+				}
+			}
+			else
+			{
+				*dst = *src;
+				src++;
+				dst++;
+				cword_val = (cword_val >> 1);
+			}
+#endif
+		}
+#endif
+    }
+    while (src <= last_byte)
+    {
+        if ((cword_val & 1) == 1)
+        {
+            fast_write((cword_val >> 1) | (1U << 31), cword_ptr, CWORD_LEN);
+            cword_ptr = dst;
+            dst += CWORD_LEN;
+            cword_val = 1U << 31;
+        }
+#if QLZ_COMPRESSION_LEVEL < 3
+        if (src <= last_byte - 3)
+        {
+#if QLZ_COMPRESSION_LEVEL == 1
+            ui32 hash, fetch;
+            fetch = fast_read(src, 3);
+            hash = hash_func(fetch);
+            state->hash[hash].offset = CAST(src - OFFSET_BASE);
+            state->hash[hash].cache = fetch;
+#elif QLZ_COMPRESSION_LEVEL == 2
+            ui32 hash;
+			unsigned char c;
+			hash = hashat(src);
+			c = state->hash_counter[hash];
+			state->hash[hash].offset[c & (QLZ_POINTERS - 1)] = src;
+			c++;
+			state->hash_counter[hash] = c;
+#endif
+        }
+#endif
+        *dst = *src;
+        src++;
+        dst++;
+        cword_val = (cword_val >> 1);
+    }
+
+    while((cword_val & 1) != 1)
+        cword_val = (cword_val >> 1);
+
+    fast_write((cword_val >> 1) | (1U << 31), cword_ptr, CWORD_LEN);
+
+    // min. size must be 9 bytes so that the qlz_size functions can take 9 bytes as argument
+    return dst - destination < 9 ? 9 : dst - destination;
+}
+
+static size_t qlz_decompress_core(const unsigned char *source, unsigned char *destination, size_t size, qlz_state_decompress *state, const unsigned char *history)
+{
+    const unsigned char *src = source + qlz_size_header((const char *)source);
+    unsigned char *dst = destination;
+    const unsigned char *last_destination_byte = destination + size - 1;
+    ui32 cword_val = 1;
+    const unsigned char *last_matchstart = last_destination_byte - UNCONDITIONAL_MATCHLEN - UNCOMPRESSED_END;
+    unsigned char *last_hashed = destination - 1;
+    const unsigned char *last_source_byte = source + qlz_size_compressed((const char *)source) - 1;
+    static const ui32 bitlut[16] = {4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0};
+
+    (void) last_source_byte;
+    (void) last_hashed;
+    (void) state;
+    (void) history;
+
+    for(;;)
+    {
+        ui32 fetch;
+
+        if (cword_val == 1)
+        {
+#ifdef QLZ_MEMORY_SAFE
+            if(src + CWORD_LEN - 1 > last_source_byte)
+                return 0;
+#endif
+            cword_val = fast_read(src, CWORD_LEN);
+            src += CWORD_LEN;
+        }
+
+#ifdef QLZ_MEMORY_SAFE
+        if(src + 4 - 1 > last_source_byte)
+            return 0;
+#endif
+
+        fetch = fast_read(src, 4);
+
+        if ((cword_val & 1) == 1)
+        {
+            ui32 matchlen;
+            const unsigned char *offset2;
+
+#if QLZ_COMPRESSION_LEVEL == 1
+            ui32 hash;
+            cword_val = cword_val >> 1;
+            hash = (fetch >> 4) & 0xfff;
+            offset2 = (const unsigned char *)(size_t)state->hash[hash].offset;
+
+            if((fetch & 0xf) != 0)
+            {
+                matchlen = (fetch & 0xf) + 2;
+                src += 2;
+            }
+            else
+            {
+                matchlen = *(src + 2);
+                src += 3;
+            }
+
+#elif QLZ_COMPRESSION_LEVEL == 2
+            ui32 hash;
+			unsigned char c;
+			cword_val = cword_val >> 1;
+			hash = (fetch >> 5) & 0x7ff;
+			c = (unsigned char)(fetch & 0x3);
+			offset2 = state->hash[hash].offset[c];
+
+			if((fetch & (28)) != 0)
+			{
+				matchlen = ((fetch >> 2) & 0x7) + 2;
+				src += 2;
+			}
+			else
+			{
+				matchlen = *(src + 2);
+				src += 3;
+			}
+
+#elif QLZ_COMPRESSION_LEVEL == 3
+			ui32 offset;
+			cword_val = cword_val >> 1;
+			if ((fetch & 3) == 0)
+			{
+				offset = (fetch & 0xff) >> 2;
+				matchlen = 3;
+				src++;
+			}
+			else if ((fetch & 2) == 0)
+			{
+				offset = (fetch & 0xffff) >> 2;
+				matchlen = 3;
+				src += 2;
+			}
+			else if ((fetch & 1) == 0)
+			{
+				offset = (fetch & 0xffff) >> 6;
+				matchlen = ((fetch >> 2) & 15) + 3;
+				src += 2;
+			}
+			else if ((fetch & 127) != 3)
+			{
+				offset = (fetch >> 7) & 0x1ffff;
+				matchlen = ((fetch >> 2) & 0x1f) + 2;
+				src += 3;
+			}
+			else
+			{
+				offset = (fetch >> 15);
+				matchlen = ((fetch >> 7) & 255) + 3;
+				src += 4;
+			}
+
+			offset2 = dst - offset;
+#endif
+
+#ifdef QLZ_MEMORY_SAFE
+            if(offset2 < history || offset2 > dst - MINOFFSET - 1)
+                return 0;
+
+            if(matchlen > (ui32)(last_destination_byte - dst - UNCOMPRESSED_END + 1))
+                return 0;
+#endif
+
+            memcpy_up(dst, offset2, matchlen);
+            dst += matchlen;
+
+#if QLZ_COMPRESSION_LEVEL <= 2
+            update_hash_upto(state, &last_hashed, dst - matchlen);
+            last_hashed = dst - 1;
+#endif
+        }
+        else
+        {
+            if (dst < last_matchstart)
+            {
+                unsigned int n = bitlut[cword_val & 0xf];
+#ifdef X86X64
+                *(ui32 *)dst = *(ui32 *)src;
+#else
+                memcpy_up(dst, src, 4);
+#endif
+                cword_val = cword_val >> n;
+                dst += n;
+                src += n;
+#if QLZ_COMPRESSION_LEVEL <= 2
+                update_hash_upto(state, &last_hashed, dst - 3);
+#endif
+            }
+            else
+            {
+                while(dst <= last_destination_byte)
+                {
+                    if (cword_val == 1)
+                    {
+                        src += CWORD_LEN;
+                        cword_val = 1U << 31;
+                    }
+#ifdef QLZ_MEMORY_SAFE
+                    if(src >= last_source_byte + 1)
+                        return 0;
+#endif
+                    *dst = *src;
+                    dst++;
+                    src++;
+                    cword_val = cword_val >> 1;
+                }
+
+#if QLZ_COMPRESSION_LEVEL <= 2
+                update_hash_upto(state, &last_hashed, last_destination_byte - 3); // todo, use constant
+#endif
+                return size;
+            }
+
+        }
+    }
+}
+
+size_t qlz_compress(const void *source, char *destination, size_t size, qlz_state_compress *state)
+{
+    size_t r;
+    ui32 compressed;
+    size_t base;
+
+    if(size == 0 || size > 0xffffffff - 400)
+        return 0;
+
+    if(size < 216)
+        base = 3;
+    else
+        base = 9;
+
+#if QLZ_STREAMING_BUFFER > 0
+    if (state->stream_counter + size - 1 >= QLZ_STREAMING_BUFFER)
+#endif
+    {
+        reset_table_compress(state);
+        r = base + qlz_compress_core((const unsigned char *)source, (unsigned char*)destination + base, size, state);
+#if QLZ_STREAMING_BUFFER > 0
+        reset_table_compress(state);
+#endif
+        if(r == base)
+        {
+            memcpy(destination + base, source, size);
+            r = size + base;
+            compressed = 0;
+        }
+        else
+        {
+            compressed = 1;
+        }
+        state->stream_counter = 0;
+    }
+#if QLZ_STREAMING_BUFFER > 0
+    else
+	{
+		unsigned char *src = state->stream_buffer + state->stream_counter;
+
+		memcpy(src, source, size);
+		r = base + qlz_compress_core(src, (unsigned char*)destination + base, size, state);
+
+ 		if(r == base)
+		{
+			memcpy(destination + base, src, size);
+			r = size + base;
+			compressed = 0;
+			reset_table_compress(state);
+		}
+		else
+		{
+			compressed = 1;
+		}
+		state->stream_counter += size;
+	}
+#endif
+    if(base == 3)
+    {
+        *destination = (unsigned char)(0 | compressed);
+        *(destination + 1) = (unsigned char)r;
+        *(destination + 2) = (unsigned char)size;
+    }
+    else
+    {
+        *destination = (unsigned char)(2 | compressed);
+        fast_write((ui32)r, destination + 1, 4);
+        fast_write((ui32)size, destination + 5, 4);
+    }
+
+    *destination |= (QLZ_COMPRESSION_LEVEL << 2);
+    *destination |= (1 << 6);
+    *destination |= ((QLZ_STREAMING_BUFFER == 0 ? 0 : (QLZ_STREAMING_BUFFER == 100000 ? 1 : (QLZ_STREAMING_BUFFER == 1000000 ? 2 : 3))) << 4);
+
+// 76543210
+// 01SSLLHC
+
+    return r;
+}
+
+size_t qlz_decompress(const char *source, void *destination, qlz_state_decompress *state)
+{
+    size_t dsiz = qlz_size_decompressed(source);
+
+#if QLZ_STREAMING_BUFFER > 0
+    if (state->stream_counter + qlz_size_decompressed(source) - 1 >= QLZ_STREAMING_BUFFER)
+#endif
+    {
+        if((*source & 1) == 1)
+        {
+            reset_table_decompress(state);
+            dsiz = qlz_decompress_core((const unsigned char *)source, (unsigned char *)destination, dsiz, state, (const unsigned char *)destination);
+        }
+        else
+        {
+            memcpy(destination, source + qlz_size_header(source), dsiz);
+        }
+        state->stream_counter = 0;
+        reset_table_decompress(state);
+    }
+#if QLZ_STREAMING_BUFFER > 0
+    else
+	{
+		unsigned char *dst = state->stream_buffer + state->stream_counter;
+		if((*source & 1) == 1)
+		{
+			dsiz = qlz_decompress_core((const unsigned char *)source, dst, dsiz, state, (const unsigned char *)state->stream_buffer);
+		}
+		else
+		{
+			memcpy(dst, source + qlz_size_header(source), dsiz);
+			reset_table_decompress(state);
+		}
+		memcpy(destination, dst, dsiz);
+		state->stream_counter += dsiz;
+	}
+#endif
+    return dsiz;
+}

src/qlz/QuickLZ.h

@@ -18,25 +18,10 @@
 
 // 1.5.0 final
 
-#ifndef QLZ_COMPRESSION_LEVEL
+/* Fixed definitions for TeaSpeak. */
-// 1 gives fastest compression speed. 3 gives fastest decompression speed and best
+#define QLZ_COMPRESSION_LEVEL 1
-// compression ratio.
-#define QLZ_COMPRESSION_LEVEL 3
-//#define QLZ_COMPRESSION_LEVEL 2
-//#define QLZ_COMPRESSION_LEVEL 3
-#endif
-
-#ifndef QLZ_STREAMING_BUFFER
-// If > 0, zero out both states prior to first call to qlz_compress() or qlz_decompress()
-// and decompress packets in the same order as they were compressed
 #define QLZ_STREAMING_BUFFER 0
-//#define QLZ_STREAMING_BUFFER 100000
+#define QLZ_MEMORY_SAFE
-//#define QLZ_STREAMING_BUFFER 1000000
-
-// Guarantees that decompression of corrupted data cannot crash. Decreases decompression
-// speed 10-20%. Compression speed not affected.
-//#define QLZ_MEMORY_SAFE
-#endif
 
 #define QLZ_VERSION_MAJOR 1
 #define QLZ_VERSION_MINOR 5
@@ -67,64 +52,68 @@ typedef unsigned short int ui16;
 
 // Detect if pointer size is 64-bit. It's not fatal if some 64-bit target is not detected because this is only for adding an optional 64-bit optimization.
 #if defined _LP64 || defined __LP64__ || defined __64BIT__ || _ADDR64 || defined _WIN64 || defined __arch64__ || __WORDSIZE == 64 || (defined __sparc && defined __sparcv9) || defined __x86_64 || defined __amd64 || defined __x86_64__ || defined _M_X64 || defined _M_IA64 || defined __ia64 || defined __IA64__
-#define QLZ_PTR_64
+	#define QLZ_PTR_64
 #endif
 
 // hash entry
-typedef struct {
+typedef struct
+{
 #if QLZ_COMPRESSION_LEVEL == 1
-    ui32 cache;
+	ui32 cache;
 #if defined QLZ_PTR_64 && QLZ_STREAMING_BUFFER == 0
-    unsigned int offset;
+	unsigned int offset;
 #else
-    const unsigned char *offset;
+	const unsigned char *offset;
 #endif
 #else
-    const unsigned char *offset[QLZ_POINTERS];
+	const unsigned char *offset[QLZ_POINTERS];
 #endif
 
 } qlz_hash_compress;
 
-typedef struct {
+typedef struct
+{
 #if QLZ_COMPRESSION_LEVEL == 1
-    const unsigned char *offset;
+	const unsigned char *offset;
 #else
-    const unsigned char *offset[QLZ_POINTERS];
+	const unsigned char *offset[QLZ_POINTERS];
 #endif
 } qlz_hash_decompress;
 
 
 // states
-typedef struct {
+typedef struct
-#if QLZ_STREAMING_BUFFER > 0
+{
-    unsigned char stream_buffer[QLZ_STREAMING_BUFFER];
+	#if QLZ_STREAMING_BUFFER > 0
-#endif
+		unsigned char stream_buffer[QLZ_STREAMING_BUFFER];
-    size_t stream_counter;
+	#endif
-    qlz_hash_compress hash[QLZ_HASH_VALUES];
+	size_t stream_counter;
-    unsigned char hash_counter[QLZ_HASH_VALUES];
+	qlz_hash_compress hash[QLZ_HASH_VALUES];
+	unsigned char hash_counter[QLZ_HASH_VALUES];
 } qlz_state_compress;
 
 
 #if QLZ_COMPRESSION_LEVEL == 1 || QLZ_COMPRESSION_LEVEL == 2
-typedef struct {
+	typedef struct
+	{
 #if QLZ_STREAMING_BUFFER > 0
-    unsigned char stream_buffer[QLZ_STREAMING_BUFFER];
+		unsigned char stream_buffer[QLZ_STREAMING_BUFFER];
 #endif
-    qlz_hash_decompress hash[QLZ_HASH_VALUES];
+		qlz_hash_decompress hash[QLZ_HASH_VALUES];
-    unsigned char hash_counter[QLZ_HASH_VALUES];
+		unsigned char hash_counter[QLZ_HASH_VALUES];
-    size_t stream_counter;
+		size_t stream_counter;
-} qlz_state_decompress;
+	} qlz_state_decompress;
 #elif QLZ_COMPRESSION_LEVEL == 3
-typedef struct
+	typedef struct
-    {
+	{
 #if QLZ_STREAMING_BUFFER > 0
-        unsigned char stream_buffer[QLZ_STREAMING_BUFFER];
+		unsigned char stream_buffer[QLZ_STREAMING_BUFFER];
 #endif
 #if QLZ_COMPRESSION_LEVEL <= 2
-        qlz_hash_decompress hash[QLZ_HASH_VALUES];
+		qlz_hash_decompress hash[QLZ_HASH_VALUES];
 #endif
-        size_t stream_counter;
+		size_t stream_counter;
-    } qlz_state_decompress;
+	} qlz_state_decompress;
 #endif
 
 
@@ -132,22 +121,6 @@ typedef struct
 extern "C" {
 #endif
 
-#if QLZ_COMPRESSION_LEVEL == 1
-    #define qlz_size_decompressed qlz_size_decompressed_level1
-    #define qlz_size_compressed qlz_size_compressed_level1
-    #define qlz_compress qlz_compress_level1
-    #define qlz_decompress qlz_decompress_level1
-    #define qlz_get_setting qlz_get_setting_level1
-#elif QLZ_COMPRESSION_LEVEL == 2
-    #define DEFINE_QLZ_FN(type, name, ...) type name##_level2(#__VA_ARGS__);
-#elif QLZ_COMPRESSION_LEVEL == 3
-    #define qlz_size_decompressed qlz_size_decompressed_level3
-    #define qlz_size_compressed qlz_size_compressed_level3
-    #define qlz_compress qlz_compress_level3
-    #define qlz_decompress qlz_decompress_level3
-    #define qlz_get_setting qlz_get_setting_level3
-#endif
-
 // Public functions of QuickLZ
 size_t qlz_size_decompressed(const char *source);
 size_t qlz_size_compressed(const char *source);

src/qlz/QuickLZ_L1.cpp

@@ -1,843 +0,0 @@
-// Fast data compression library
-// Copyright (C) 2006-2011 Lasse Mikkel Reinhold
-// lar@quicklz.com
-//
-// QuickLZ can be used for free under the GPL 1, 2 or 3 license (where anything
-// released into public must be open source) or under a commercial license if such
-// has been acquired (see http://www.quicklz.com/order.html). The commercial license
-// does not cover derived or ported versions created by third parties under GPL.
-
-// 1.5.0 final
-
-#define QLZ_COMPRESSION_LEVEL 1
-#define QLZ_MEMORY_SAFE
-#include "QuickLZ.h"
-
-#if QLZ_VERSION_MAJOR != 1 || QLZ_VERSION_MINOR != 5 || QLZ_VERSION_REVISION != 0
-#error quicklz.c and quicklz.h have different versions
-#endif
-
-#if (defined(__X86__) || defined(__i386__) || defined(i386) || defined(_M_IX86) || defined(__386__) || defined(__x86_64__) || defined(_M_X64))
-#define X86X64
-#endif
-
-#define MINOFFSET 2
-#define UNCONDITIONAL_MATCHLEN 6
-#define UNCOMPRESSED_END 4
-#define CWORD_LEN 4
-
-#if QLZ_COMPRESSION_LEVEL == 1 && defined QLZ_PTR_64 && QLZ_STREAMING_BUFFER == 0
-#define OFFSET_BASE source
-    #define CAST (ui32)(size_t)
-#else
-#define OFFSET_BASE 0
-#define CAST
-#endif
-
-int qlz_get_setting(int setting)
-{
-    switch (setting)
-    {
-        case 0: return QLZ_COMPRESSION_LEVEL;
-        case 1: return sizeof(qlz_state_compress);
-        case 2: return sizeof(qlz_state_decompress);
-        case 3: return QLZ_STREAMING_BUFFER;
-#ifdef QLZ_MEMORY_SAFE
-            case 6: return 1;
-#else
-        case 6: return 0;
-#endif
-        case 7: return QLZ_VERSION_MAJOR;
-        case 8: return QLZ_VERSION_MINOR;
-        case 9: return QLZ_VERSION_REVISION;
-    }
-    return -1;
-}
-
-#if QLZ_COMPRESSION_LEVEL == 1
-static int same(const unsigned char *src, size_t n)
-{
-    while(n > 0 && *(src + n) == *src)
-        n--;
-    return n == 0 ? 1 : 0;
-}
-#endif
-
-static void reset_table_compress(qlz_state_compress *state)
-{
-    int i;
-    for(i = 0; i < QLZ_HASH_VALUES; i++)
-    {
-#if QLZ_COMPRESSION_LEVEL == 1
-        state->hash[i].offset = 0;
-#else
-        state->hash_counter[i] = 0;
-#endif
-    }
-}
-
-static void reset_table_decompress(qlz_state_decompress *state)
-{
-    int i;
-    (void)state;
-    (void)i;
-#if QLZ_COMPRESSION_LEVEL == 2
-    for(i = 0; i < QLZ_HASH_VALUES; i++)
-    {
-        state->hash_counter[i] = 0;
-    }
-#endif
-}
-
-static __inline ui32 hash_func(ui32 i)
-{
-#if QLZ_COMPRESSION_LEVEL == 2
-    return ((i >> 9) ^ (i >> 13) ^ i) & (QLZ_HASH_VALUES - 1);
-#else
-    return ((i >> 12) ^ i) & (QLZ_HASH_VALUES - 1);
-#endif
-}
-
-static __inline ui32 fast_read(void const *src, ui32 bytes)
-{
-#ifndef X86X64
-    unsigned char *p = (unsigned char*)src;
-    switch (bytes)
-    {
-        case 4:
-            return(*p | *(p + 1) << 8 | *(p + 2) << 16 | *(p + 3) << 24);
-        case 3:
-            return(*p | *(p + 1) << 8 | *(p + 2) << 16);
-        case 2:
-            return(*p | *(p + 1) << 8);
-        case 1:
-            return(*p);
-    }
-    return 0;
-#else
-    if (bytes >= 1 && bytes <= 4)
-        return *((ui32*)src);
-    else
-        return 0;
-#endif
-}
-
-static __inline ui32 hashat(const unsigned char *src)
-{
-    ui32 fetch, hash;
-    fetch = fast_read(src, 3);
-    hash = hash_func(fetch);
-    return hash;
-}
-
-static __inline void fast_write(ui32 f, void *dst, size_t bytes)
-{
-#ifndef X86X64
-    unsigned char *p = (unsigned char*)dst;
-
-    switch (bytes)
-    {
-        case 4:
-            *p = (unsigned char)f;
-            *(p + 1) = (unsigned char)(f >> 8);
-            *(p + 2) = (unsigned char)(f >> 16);
-            *(p + 3) = (unsigned char)(f >> 24);
-            return;
-        case 3:
-            *p = (unsigned char)f;
-            *(p + 1) = (unsigned char)(f >> 8);
-            *(p + 2) = (unsigned char)(f >> 16);
-            return;
-        case 2:
-            *p = (unsigned char)f;
-            *(p + 1) = (unsigned char)(f >> 8);
-            return;
-        case 1:
-            *p = (unsigned char)f;
-            return;
-    }
-#else
-    switch (bytes)
-    {
-        case 4:
-            *((ui32*)dst) = f;
-            return;
-        case 3:
-            *((ui32*)dst) = f;
-            return;
-        case 2:
-            *((ui16 *)dst) = (ui16)f;
-            return;
-        case 1:
-            *((unsigned char*)dst) = (unsigned char)f;
-            return;
-    }
-#endif
-}
-
-
-size_t qlz_size_decompressed(const char *source)
-{
-    ui32 n, r;
-    n = (((*source) & 2) == 2) ? 4 : 1;
-    r = fast_read(source + 1 + n, n);
-    r = r & (0xffffffff >> ((4 - n)*8));
-    return r;
-}
-
-size_t qlz_size_compressed(const char *source)
-{
-    ui32 n, r;
-    n = (((*source) & 2) == 2) ? 4 : 1;
-    r = fast_read(source + 1, n);
-    r = r & (0xffffffff >> ((4 - n)*8));
-    return r;
-}
-
-static __inline void memcpy_up(unsigned char *dst, const unsigned char *src, ui32 n)
-{
-    // Caution if modifying memcpy_up! Overlap of dst and src must be special handled.
-#ifndef X86X64
-    unsigned char *end = dst + n;
-    while(dst < end)
-    {
-        *dst = *src;
-        dst++;
-        src++;
-    }
-#else
-    ui32 f = 0;
-    do
-    {
-        *(ui32 *)(dst + f) = *(ui32 *)(src + f);
-        f += MINOFFSET + 1;
-    }
-    while (f < n);
-#endif
-}
-
-static __inline void update_hash(qlz_state_decompress *state, const unsigned char *s)
-{
-#if QLZ_COMPRESSION_LEVEL == 1
-    ui32 hash;
-    hash = hashat(s);
-    state->hash[hash].offset = s;
-    state->hash_counter[hash] = 1;
-#elif QLZ_COMPRESSION_LEVEL == 2
-    ui32 hash;
-    unsigned char c;
-    hash = hashat(s);
-    c = state->hash_counter[hash];
-    state->hash[hash].offset[c & (QLZ_POINTERS - 1)] = s;
-    c++;
-    state->hash_counter[hash] = c;
-#endif
-    (void)state;
-    (void)s;
-}
-
-#if QLZ_COMPRESSION_LEVEL <= 2
-static void update_hash_upto(qlz_state_decompress *state, unsigned char **lh, const unsigned char *max)
-{
-    while(*lh < max)
-    {
-        (*lh)++;
-        update_hash(state, *lh);
-    }
-}
-#endif
-
-static size_t qlz_compress_core(const unsigned char *source, unsigned char *destination, size_t size, qlz_state_compress *state)
-{
-    const unsigned char *last_byte = source + size - 1;
-    const unsigned char *src = source;
-    unsigned char *cword_ptr = destination;
-    unsigned char *dst = destination + CWORD_LEN;
-    ui32 cword_val = 1U << 31;
-    const unsigned char *last_matchstart = last_byte - UNCONDITIONAL_MATCHLEN - UNCOMPRESSED_END;
-    ui32 fetch = 0;
-    unsigned int lits = 0;
-
-    (void) lits;
-
-    if(src <= last_matchstart)
-        fetch = fast_read(src, 3);
-
-    while(src <= last_matchstart)
-    {
-        if ((cword_val & 1) == 1)
-        {
-            // store uncompressed if compression ratio is too low
-            if (src > source + (size >> 1) && dst - destination > src - source - ((src - source) >> 5))
-                return 0;
-
-            fast_write((cword_val >> 1) | (1U << 31), cword_ptr, CWORD_LEN);
-
-            cword_ptr = dst;
-            dst += CWORD_LEN;
-            cword_val = 1U << 31;
-            fetch = fast_read(src, 3);
-        }
-#if QLZ_COMPRESSION_LEVEL == 1
-        {
-            const unsigned char *o;
-            ui32 hash, cached;
-
-            hash = hash_func(fetch);
-            cached = fetch ^ state->hash[hash].cache;
-            state->hash[hash].cache = fetch;
-
-            o = state->hash[hash].offset + OFFSET_BASE;
-            state->hash[hash].offset = CAST(src - OFFSET_BASE);
-
-#ifdef X86X64
-            if ((cached & 0xffffff) == 0 && o != OFFSET_BASE && (src - o > MINOFFSET || (src == o + 1 && lits >= 3 && src > source + 3 && same(src - 3, 6))))
-            {
-                if(cached != 0)
-                {
-#else
-            if (cached == 0 && o != OFFSET_BASE && (src - o > MINOFFSET || (src == o + 1 && lits >= 3 && src > source + 3 && same(src - 3, 6))))
-            {
-                if (*(o + 3) != *(src + 3))
-                {
-#endif
-                    hash <<= 4;
-                    cword_val = (cword_val >> 1) | (1U << 31);
-                    fast_write((3 - 2) | hash, dst, 2);
-                    src += 3;
-                    dst += 2;
-                }
-                else
-                {
-                    const unsigned char *old_src = src;
-                    size_t matchlen;
-                    hash <<= 4;
-
-                    cword_val = (cword_val >> 1) | (1U << 31);
-                    src += 4;
-
-                    if(*(o + (src - old_src)) == *src)
-                    {
-                        src++;
-                        if(*(o + (src - old_src)) == *src)
-                        {
-                            size_t q = last_byte - UNCOMPRESSED_END - (src - 5) + 1;
-                            size_t remaining = q > 255 ? 255 : q;
-                            src++;
-                            while(*(o + (src - old_src)) == *src && (size_t)(src - old_src) < remaining)
-                                src++;
-                        }
-                    }
-
-                    matchlen = src - old_src;
-                    if (matchlen < 18)
-                    {
-                        fast_write((ui32)(matchlen - 2) | hash, dst, 2);
-                        dst += 2;
-                    }
-                    else
-                    {
-                        fast_write((ui32)(matchlen << 16) | hash, dst, 3);
-                        dst += 3;
-                    }
-                }
-                fetch = fast_read(src, 3);
-                lits = 0;
-            }
-            else
-            {
-                lits++;
-                *dst = *src;
-                src++;
-                dst++;
-                cword_val = (cword_val >> 1);
-#ifdef X86X64
-                fetch = fast_read(src, 3);
-#else
-                fetch = (fetch >> 8 & 0xffff) | (*(src + 2) << 16);
-#endif
-            }
-        }
-#elif QLZ_COMPRESSION_LEVEL >= 2
-        {
-            const unsigned char *o, *offset2;
-            ui32 hash, matchlen, k, m, best_k = 0;
-            unsigned char c;
-            size_t remaining = (last_byte - UNCOMPRESSED_END - src + 1) > 255 ? 255 : (last_byte - UNCOMPRESSED_END - src + 1);
-            (void)best_k;
-
-
-            //hash = hashat(src);
-            fetch = fast_read(src, 3);
-            hash = hash_func(fetch);
-
-            c = state->hash_counter[hash];
-
-            offset2 = state->hash[hash].offset[0];
-            if(offset2 < src - MINOFFSET && c > 0 && ((fast_read(offset2, 3) ^ fetch) & 0xffffff) == 0)
-            {
-                matchlen = 3;
-                if(*(offset2 + matchlen) == *(src + matchlen))
-                {
-                    matchlen = 4;
-                    while(*(offset2 + matchlen) == *(src + matchlen) && matchlen < remaining)
-                        matchlen++;
-                }
-            }
-            else
-                matchlen = 0;
-            for(k = 1; k < QLZ_POINTERS && c > k; k++)
-            {
-                o = state->hash[hash].offset[k];
-#if QLZ_COMPRESSION_LEVEL == 3
-                if(((fast_read(o, 3) ^ fetch) & 0xffffff) == 0 && o < src - MINOFFSET)
-#elif QLZ_COMPRESSION_LEVEL == 2
-                if(*(src + matchlen) == *(o + matchlen)    && ((fast_read(o, 3) ^ fetch) & 0xffffff) == 0 && o < src - MINOFFSET)
-#endif
-                {
-                    m = 3;
-                    while(*(o + m) == *(src + m) && m < remaining)
-                        m++;
-#if QLZ_COMPRESSION_LEVEL == 3
-                    if ((m > matchlen) || (m == matchlen && o > offset2))
-#elif QLZ_COMPRESSION_LEVEL == 2
-                    if (m > matchlen)
-#endif
-                    {
-                        offset2 = o;
-                        matchlen = m;
-                        best_k = k;
-                    }
-                }
-            }
-            o = offset2;
-            state->hash[hash].offset[c & (QLZ_POINTERS - 1)] = src;
-            c++;
-            state->hash_counter[hash] = c;
-
-#if QLZ_COMPRESSION_LEVEL == 3
-            if(matchlen > 2 && src - o < 131071)
-            {
-                ui32 u;
-                size_t offset = src - o;
-
-                for(u = 1; u < matchlen; u++)
-                {
-                    hash = hashat(src + u);
-                    c = state->hash_counter[hash]++;
-                    state->hash[hash].offset[c & (QLZ_POINTERS - 1)] = src + u;
-                }
-
-                cword_val = (cword_val >> 1) | (1U << 31);
-                src += matchlen;
-
-                if(matchlen == 3 && offset <= 63)
-                {
-                    *dst = (unsigned char)(offset << 2);
-                    dst++;
-                }
-                else if (matchlen == 3 && offset <= 16383)
-                {
-                    ui32 f = (ui32)((offset << 2) | 1);
-                    fast_write(f, dst, 2);
-                    dst += 2;
-                }
-                else if (matchlen <= 18 && offset <= 1023)
-                {
-                    ui32 f = ((matchlen - 3) << 2) | ((ui32)offset << 6) | 2;
-                    fast_write(f, dst, 2);
-                    dst += 2;
-                }
-
-                else if(matchlen <= 33)
-                {
-                    ui32 f = ((matchlen - 2) << 2) | ((ui32)offset << 7) | 3;
-                    fast_write(f, dst, 3);
-                    dst += 3;
-                }
-                else
-                {
-                    ui32 f = ((matchlen - 3) << 7) | ((ui32)offset << 15) | 3;
-                    fast_write(f, dst, 4);
-                    dst += 4;
-                }
-            }
-            else
-            {
-                *dst = *src;
-                src++;
-                dst++;
-                cword_val = (cword_val >> 1);
-            }
-#elif QLZ_COMPRESSION_LEVEL == 2
-
-            if(matchlen > 2)
-            {
-                cword_val = (cword_val >> 1) | (1U << 31);
-                src += matchlen;
-
-                if (matchlen < 10)
-                {
-                    ui32 f = best_k | ((matchlen - 2) << 2) | (hash << 5);
-                    fast_write(f, dst, 2);
-                    dst += 2;
-                }
-                else
-                {
-                    ui32 f = best_k | (matchlen << 16) | (hash << 5);
-                    fast_write(f, dst, 3);
-                    dst += 3;
-                }
-            }
-            else
-            {
-                *dst = *src;
-                src++;
-                dst++;
-                cword_val = (cword_val >> 1);
-            }
-#endif
-        }
-#endif
-    }
-    while (src <= last_byte)
-    {
-        if ((cword_val & 1) == 1)
-        {
-            fast_write((cword_val >> 1) | (1U << 31), cword_ptr, CWORD_LEN);
-            cword_ptr = dst;
-            dst += CWORD_LEN;
-            cword_val = 1U << 31;
-        }
-#if QLZ_COMPRESSION_LEVEL < 3
-        if (src <= last_byte - 3)
-        {
-#if QLZ_COMPRESSION_LEVEL == 1
-            ui32 hash, fetch;
-            fetch = fast_read(src, 3);
-            hash = hash_func(fetch);
-            state->hash[hash].offset = CAST(src - OFFSET_BASE);
-            state->hash[hash].cache = fetch;
-#elif QLZ_COMPRESSION_LEVEL == 2
-            ui32 hash;
-            unsigned char c;
-            hash = hashat(src);
-            c = state->hash_counter[hash];
-            state->hash[hash].offset[c & (QLZ_POINTERS - 1)] = src;
-            c++;
-            state->hash_counter[hash] = c;
-#endif
-        }
-#endif
-        *dst = *src;
-        src++;
-        dst++;
-        cword_val = (cword_val >> 1);
-    }
-
-    while((cword_val & 1) != 1)
-        cword_val = (cword_val >> 1);
-
-    fast_write((cword_val >> 1) | (1U << 31), cword_ptr, CWORD_LEN);
-
-    // min. size must be 9 bytes so that the qlz_size functions can take 9 bytes as argument
-    return dst - destination < 9 ? 9 : dst - destination;
-}
-
-extern size_t qlz_size_header(const char *source);
-static size_t qlz_decompress_core(const unsigned char *source, unsigned char *destination, size_t size, qlz_state_decompress *state, const unsigned char *history)
-{
-    const unsigned char *src = source + qlz_size_header((const char *)source);
-    unsigned char *dst = destination;
-    const unsigned char *last_destination_byte = destination + size - 1;
-    ui32 cword_val = 1;
-    const unsigned char *last_matchstart = last_destination_byte - UNCONDITIONAL_MATCHLEN - UNCOMPRESSED_END;
-    unsigned char *last_hashed = destination - 1;
-    const unsigned char *last_source_byte = source + qlz_size_compressed((const char *)source) - 1;
-    static const ui32 bitlut[16] = {4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0};
-
-    (void) last_source_byte;
-    (void) last_hashed;
-    (void) state;
-    (void) history;
-
-    for(;;)
-    {
-        ui32 fetch;
-
-        if (cword_val == 1)
-        {
-#ifdef QLZ_MEMORY_SAFE
-            if(src + CWORD_LEN - 1 > last_source_byte)
-                return 0;
-#endif
-            cword_val = fast_read(src, CWORD_LEN);
-            src += CWORD_LEN;
-        }
-
-#ifdef QLZ_MEMORY_SAFE
-        if(src + 4 - 1 > last_source_byte)
-                return 0;
-#endif
-
-        fetch = fast_read(src, 4);
-
-        if ((cword_val & 1) == 1)
-        {
-            ui32 matchlen;
-            const unsigned char *offset2;
-
-#if QLZ_COMPRESSION_LEVEL == 1
-            ui32 hash;
-            cword_val = cword_val >> 1;
-            hash = (fetch >> 4) & 0xfff;
-            offset2 = (const unsigned char *)(size_t)state->hash[hash].offset;
-
-            if((fetch & 0xf) != 0)
-            {
-                matchlen = (fetch & 0xf) + 2;
-                src += 2;
-            }
-            else
-            {
-                matchlen = *(src + 2);
-                src += 3;
-            }
-
-#elif QLZ_COMPRESSION_LEVEL == 2
-            ui32 hash;
-            unsigned char c;
-            cword_val = cword_val >> 1;
-            hash = (fetch >> 5) & 0x7ff;
-            c = (unsigned char)(fetch & 0x3);
-            offset2 = state->hash[hash].offset[c];
-
-            if((fetch & (28)) != 0)
-            {
-                matchlen = ((fetch >> 2) & 0x7) + 2;
-                src += 2;
-            }
-            else
-            {
-                matchlen = *(src + 2);
-                src += 3;
-            }
-
-#elif QLZ_COMPRESSION_LEVEL == 3
-            ui32 offset;
-            cword_val = cword_val >> 1;
-            if ((fetch & 3) == 0)
-            {
-                offset = (fetch & 0xff) >> 2;
-                matchlen = 3;
-                src++;
-            }
-            else if ((fetch & 2) == 0)
-            {
-                offset = (fetch & 0xffff) >> 2;
-                matchlen = 3;
-                src += 2;
-            }
-            else if ((fetch & 1) == 0)
-            {
-                offset = (fetch & 0xffff) >> 6;
-                matchlen = ((fetch >> 2) & 15) + 3;
-                src += 2;
-            }
-            else if ((fetch & 127) != 3)
-            {
-                offset = (fetch >> 7) & 0x1ffff;
-                matchlen = ((fetch >> 2) & 0x1f) + 2;
-                src += 3;
-            }
-            else
-            {
-                offset = (fetch >> 15);
-                matchlen = ((fetch >> 7) & 255) + 3;
-                src += 4;
-            }
-
-            offset2 = dst - offset;
-#endif
-
-#ifdef QLZ_MEMORY_SAFE
-            if(offset2 < history || offset2 > dst - MINOFFSET - 1)
-                return 0;
-
-            if(matchlen > (ui32)(last_destination_byte - dst - UNCOMPRESSED_END + 1))
-                return 0;
-#endif
-
-            memcpy_up(dst, offset2, matchlen);
-            dst += matchlen;
-
-#if QLZ_COMPRESSION_LEVEL <= 2
-            update_hash_upto(state, &last_hashed, dst - matchlen);
-            last_hashed = dst - 1;
-#endif
-        }
-        else
-        {
-            if (dst < last_matchstart)
-            {
-                unsigned int n = bitlut[cword_val & 0xf];
-#ifdef X86X64
-                *(ui32 *)dst = *(ui32 *)src;
-#else
-                memcpy_up(dst, src, 4);
-#endif
-                cword_val = cword_val >> n;
-                dst += n;
-                src += n;
-#if QLZ_COMPRESSION_LEVEL <= 2
-                update_hash_upto(state, &last_hashed, dst - 3);
-#endif
-            }
-            else
-            {
-                while(dst <= last_destination_byte)
-                {
-                    if (cword_val == 1)
-                    {
-                        src += CWORD_LEN;
-                        cword_val = 1U << 31;
-                    }
-#ifdef QLZ_MEMORY_SAFE
-                    if(src >= last_source_byte + 1)
-                        return 0;
-#endif
-                    *dst = *src;
-                    dst++;
-                    src++;
-                    cword_val = cword_val >> 1;
-                }
-
-#if QLZ_COMPRESSION_LEVEL <= 2
-                update_hash_upto(state, &last_hashed, last_destination_byte - 3); // todo, use constant
-#endif
-                return size;
-            }
-
-        }
-    }
-}
-
-size_t qlz_compress(const void *source, char *destination, size_t size, qlz_state_compress *state)
-{
-    size_t r;
-    ui32 compressed;
-    size_t base;
-
-    if(size == 0 || size > 0xffffffff - 400)
-        return 0;
-
-    if(size < 216)
-        base = 3;
-    else
-        base = 9;
-
-#if QLZ_STREAMING_BUFFER > 0
-    if (state->stream_counter + size - 1 >= QLZ_STREAMING_BUFFER)
-#endif
-    {
-        reset_table_compress(state);
-        r = base + qlz_compress_core((const unsigned char *)source, (unsigned char*)destination + base, size, state);
-#if QLZ_STREAMING_BUFFER > 0
-        reset_table_compress(state);
-#endif
-        if(r == base)
-        {
-            memcpy(destination + base, source, size);
-            r = size + base;
-            compressed = 0;
-        }
-        else
-        {
-            compressed = 1;
-        }
-        state->stream_counter = 0;
-    }
-#if QLZ_STREAMING_BUFFER > 0
-    else
-    {
-        unsigned char *src = state->stream_buffer + state->stream_counter;
-
-        memcpy(src, source, size);
-        r = base + qlz_compress_core(src, (unsigned char*)destination + base, size, state);
-
-         if(r == base)
-        {
-            memcpy(destination + base, src, size);
-            r = size + base;
-            compressed = 0;
-            reset_table_compress(state);
-        }
-        else
-        {
-            compressed = 1;
-        }
-        state->stream_counter += size;
-    }
-#endif
-    if(base == 3)
-    {
-        *destination = (unsigned char)(0 | compressed);
-        *(destination + 1) = (unsigned char)r;
-        *(destination + 2) = (unsigned char)size;
-    }
-    else
-    {
-        *destination = (unsigned char)(2 | compressed);
-        fast_write((ui32)r, destination + 1, 4);
-        fast_write((ui32)size, destination + 5, 4);
-    }
-
-    *destination |= (QLZ_COMPRESSION_LEVEL << 2);
-    *destination |= (1 << 6);
-    *destination |= ((QLZ_STREAMING_BUFFER == 0 ? 0 : (QLZ_STREAMING_BUFFER == 100000 ? 1 : (QLZ_STREAMING_BUFFER == 1000000 ? 2 : 3))) << 4);
-
-// 76543210
-// 01SSLLHC
-
-    return r;
-}
-
-size_t qlz_decompress(const char *source, void *destination, qlz_state_decompress *state)
-{
-    size_t dsiz = qlz_size_decompressed(source);
-
-#if QLZ_STREAMING_BUFFER > 0
-    if (state->stream_counter + qlz_size_decompressed(source) - 1 >= QLZ_STREAMING_BUFFER)
-#endif
-    {
-        if((*source & 1) == 1)
-        {
-            reset_table_decompress(state);
-            dsiz = qlz_decompress_core((const unsigned char *)source, (unsigned char *)destination, dsiz, state, (const unsigned char *)destination);
-        }
-        else
-        {
-            memcpy(destination, source + qlz_size_header(source), dsiz);
-        }
-        state->stream_counter = 0;
-        reset_table_decompress(state);
-    }
-#if QLZ_STREAMING_BUFFER > 0
-    else
-    {
-        unsigned char *dst = state->stream_buffer + state->stream_counter;
-        if((*source & 1) == 1)
-        {
-            dsiz = qlz_decompress_core((const unsigned char *)source, dst, dsiz, state, (const unsigned char *)state->stream_buffer);
-        }
-        else
-        {
-            memcpy(dst, source + qlz_size_header(source), dsiz);
-            reset_table_decompress(state);
-        }
-        memcpy(destination, dst, dsiz);
-        state->stream_counter += dsiz;
-    }
-#endif
-    return dsiz;
-}

src/qlz/QuickLZ_L2.cpp

@@ -1,848 +0,0 @@
-// Fast data compression library
-// Copyright (C) 2006-2011 Lasse Mikkel Reinhold
-// lar@quicklz.com
-//
-// QuickLZ can be used for free under the GPL 1, 2 or 3 license (where anything
-// released into public must be open source) or under a commercial license if such
-// has been acquired (see http://www.quicklz.com/order.html). The commercial license
-// does not cover derived or ported versions created by third parties under GPL.
-
-// 1.5.0 final
-
-#define QLZ_COMPRESSION_LEVEL 2
-#include "QuickLZ.h"
-
-#if QLZ_VERSION_MAJOR != 1 || QLZ_VERSION_MINOR != 5 || QLZ_VERSION_REVISION != 0
-#error quicklz.c and quicklz.h have different versions
-#endif
-
-#if (defined(__X86__) || defined(__i386__) || defined(i386) || defined(_M_IX86) || defined(__386__) || defined(__x86_64__) || defined(_M_X64))
-#define X86X64
-#endif
-
-#define MINOFFSET 2
-#define UNCONDITIONAL_MATCHLEN 6
-#define UNCOMPRESSED_END 4
-#define CWORD_LEN 4
-
-#if QLZ_COMPRESSION_LEVEL == 1 && defined QLZ_PTR_64 && QLZ_STREAMING_BUFFER == 0
-#define OFFSET_BASE source
-    #define CAST (ui32)(size_t)
-#else
-#define OFFSET_BASE 0
-#define CAST
-#endif
-
-int qlz_get_setting(int setting)
-{
-    switch (setting)
-    {
-        case 0: return QLZ_COMPRESSION_LEVEL;
-        case 1: return sizeof(qlz_state_compress);
-        case 2: return sizeof(qlz_state_decompress);
-        case 3: return QLZ_STREAMING_BUFFER;
-#ifdef QLZ_MEMORY_SAFE
-            case 6: return 1;
-#else
-        case 6: return 0;
-#endif
-        case 7: return QLZ_VERSION_MAJOR;
-        case 8: return QLZ_VERSION_MINOR;
-        case 9: return QLZ_VERSION_REVISION;
-    }
-    return -1;
-}
-
-#if QLZ_COMPRESSION_LEVEL == 1
-static int same(const unsigned char *src, size_t n)
-{
-    while(n > 0 && *(src + n) == *src)
-        n--;
-    return n == 0 ? 1 : 0;
-}
-#endif
-
-static void reset_table_compress(qlz_state_compress *state)
-{
-    int i;
-    for(i = 0; i < QLZ_HASH_VALUES; i++)
-    {
-#if QLZ_COMPRESSION_LEVEL == 1
-        state->hash[i].offset = 0;
-#else
-        state->hash_counter[i] = 0;
-#endif
-    }
-}
-
-static void reset_table_decompress(qlz_state_decompress *state)
-{
-    int i;
-    (void)state;
-    (void)i;
-#if QLZ_COMPRESSION_LEVEL == 2
-    for(i = 0; i < QLZ_HASH_VALUES; i++)
-    {
-        state->hash_counter[i] = 0;
-    }
-#endif
-}
-
-static __inline ui32 hash_func(ui32 i)
-{
-#if QLZ_COMPRESSION_LEVEL == 2
-    return ((i >> 9) ^ (i >> 13) ^ i) & (QLZ_HASH_VALUES - 1);
-#else
-    return ((i >> 12) ^ i) & (QLZ_HASH_VALUES - 1);
-#endif
-}
-
-static __inline ui32 fast_read(void const *src, ui32 bytes)
-{
-#ifndef X86X64
-    unsigned char *p = (unsigned char*)src;
-    switch (bytes)
-    {
-        case 4:
-            return(*p | *(p + 1) << 8 | *(p + 2) << 16 | *(p + 3) << 24);
-        case 3:
-            return(*p | *(p + 1) << 8 | *(p + 2) << 16);
-        case 2:
-            return(*p | *(p + 1) << 8);
-        case 1:
-            return(*p);
-    }
-    return 0;
-#else
-    if (bytes >= 1 && bytes <= 4)
-        return *((ui32*)src);
-    else
-        return 0;
-#endif
-}
-
-static __inline ui32 hashat(const unsigned char *src)
-{
-    ui32 fetch, hash;
-    fetch = fast_read(src, 3);
-    hash = hash_func(fetch);
-    return hash;
-}
-
-static __inline void fast_write(ui32 f, void *dst, size_t bytes)
-{
-#ifndef X86X64
-    unsigned char *p = (unsigned char*)dst;
-
-    switch (bytes)
-    {
-        case 4:
-            *p = (unsigned char)f;
-            *(p + 1) = (unsigned char)(f >> 8);
-            *(p + 2) = (unsigned char)(f >> 16);
-            *(p + 3) = (unsigned char)(f >> 24);
-            return;
-        case 3:
-            *p = (unsigned char)f;
-            *(p + 1) = (unsigned char)(f >> 8);
-            *(p + 2) = (unsigned char)(f >> 16);
-            return;
-        case 2:
-            *p = (unsigned char)f;
-            *(p + 1) = (unsigned char)(f >> 8);
-            return;
-        case 1:
-            *p = (unsigned char)f;
-            return;
-    }
-#else
-    switch (bytes)
-    {
-        case 4:
-            *((ui32*)dst) = f;
-            return;
-        case 3:
-            *((ui32*)dst) = f;
-            return;
-        case 2:
-            *((ui16 *)dst) = (ui16)f;
-            return;
-        case 1:
-            *((unsigned char*)dst) = (unsigned char)f;
-            return;
-    }
-#endif
-}
-
-
-size_t qlz_size_decompressed(const char *source)
-{
-    ui32 n, r;
-    n = (((*source) & 2) == 2) ? 4 : 1;
-    r = fast_read(source + 1 + n, n);
-    r = r & (0xffffffff >> ((4 - n)*8));
-    return r;
-}
-
-size_t qlz_size_compressed(const char *source)
-{
-    ui32 n, r;
-    n = (((*source) & 2) == 2) ? 4 : 1;
-    r = fast_read(source + 1, n);
-    r = r & (0xffffffff >> ((4 - n)*8));
-    return r;
-}
-
-size_t qlz_size_header(const char *source)
-{
-    size_t n = 2*((((*source) & 2) == 2) ? 4 : 1) + 1;
-    return n;
-}
-
-
-static __inline void memcpy_up(unsigned char *dst, const unsigned char *src, ui32 n)
-{
-    // Caution if modifying memcpy_up! Overlap of dst and src must be special handled.
-#ifndef X86X64
-    unsigned char *end = dst + n;
-    while(dst < end)
-    {
-        *dst = *src;
-        dst++;
-        src++;
-    }
-#else
-    ui32 f = 0;
-    do
-    {
-        *(ui32 *)(dst + f) = *(ui32 *)(src + f);
-        f += MINOFFSET + 1;
-    }
-    while (f < n);
-#endif
-}
-
-static __inline void update_hash(qlz_state_decompress *state, const unsigned char *s)
-{
-#if QLZ_COMPRESSION_LEVEL == 1
-    ui32 hash;
-    hash = hashat(s);
-    state->hash[hash].offset = s;
-    state->hash_counter[hash] = 1;
-#elif QLZ_COMPRESSION_LEVEL == 2
-    ui32 hash;
-    unsigned char c;
-    hash = hashat(s);
-    c = state->hash_counter[hash];
-    state->hash[hash].offset[c & (QLZ_POINTERS - 1)] = s;
-    c++;
-    state->hash_counter[hash] = c;
-#endif
-    (void)state;
-    (void)s;
-}
-
-#if QLZ_COMPRESSION_LEVEL <= 2
-static void update_hash_upto(qlz_state_decompress *state, unsigned char **lh, const unsigned char *max)
-{
-    while(*lh < max)
-    {
-        (*lh)++;
-        update_hash(state, *lh);
-    }
-}
-#endif
-
-static size_t qlz_compress_core(const unsigned char *source, unsigned char *destination, size_t size, qlz_state_compress *state)
-{
-    const unsigned char *last_byte = source + size - 1;
-    const unsigned char *src = source;
-    unsigned char *cword_ptr = destination;
-    unsigned char *dst = destination + CWORD_LEN;
-    ui32 cword_val = 1U << 31;
-    const unsigned char *last_matchstart = last_byte - UNCONDITIONAL_MATCHLEN - UNCOMPRESSED_END;
-    ui32 fetch = 0;
-    unsigned int lits = 0;
-
-    (void) lits;
-
-    if(src <= last_matchstart)
-        fetch = fast_read(src, 3);
-
-    while(src <= last_matchstart)
-    {
-        if ((cword_val & 1) == 1)
-        {
-            // store uncompressed if compression ratio is too low
-            if (src > source + (size >> 1) && dst - destination > src - source - ((src - source) >> 5))
-                return 0;
-
-            fast_write((cword_val >> 1) | (1U << 31), cword_ptr, CWORD_LEN);
-
-            cword_ptr = dst;
-            dst += CWORD_LEN;
-            cword_val = 1U << 31;
-            fetch = fast_read(src, 3);
-        }
-#if QLZ_COMPRESSION_LEVEL == 1
-        {
-            const unsigned char *o;
-            ui32 hash, cached;
-
-            hash = hash_func(fetch);
-            cached = fetch ^ state->hash[hash].cache;
-            state->hash[hash].cache = fetch;
-
-            o = state->hash[hash].offset + OFFSET_BASE;
-            state->hash[hash].offset = CAST(src - OFFSET_BASE);
-
-#ifdef X86X64
-            if ((cached & 0xffffff) == 0 && o != OFFSET_BASE && (src - o > MINOFFSET || (src == o + 1 && lits >= 3 && src > source + 3 && same(src - 3, 6))))
-            {
-                if(cached != 0)
-                {
-#else
-            if (cached == 0 && o != OFFSET_BASE && (src - o > MINOFFSET || (src == o + 1 && lits >= 3 && src > source + 3 && same(src - 3, 6))))
-            {
-                if (*(o + 3) != *(src + 3))
-                {
-#endif
-                    hash <<= 4;
-                    cword_val = (cword_val >> 1) | (1U << 31);
-                    fast_write((3 - 2) | hash, dst, 2);
-                    src += 3;
-                    dst += 2;
-                }
-                else
-                {
-                    const unsigned char *old_src = src;
-                    size_t matchlen;
-                    hash <<= 4;
-
-                    cword_val = (cword_val >> 1) | (1U << 31);
-                    src += 4;
-
-                    if(*(o + (src - old_src)) == *src)
-                    {
-                        src++;
-                        if(*(o + (src - old_src)) == *src)
-                        {
-                            size_t q = last_byte - UNCOMPRESSED_END - (src - 5) + 1;
-                            size_t remaining = q > 255 ? 255 : q;
-                            src++;
-                            while(*(o + (src - old_src)) == *src && (size_t)(src - old_src) < remaining)
-                                src++;
-                        }
-                    }
-
-                    matchlen = src - old_src;
-                    if (matchlen < 18)
-                    {
-                        fast_write((ui32)(matchlen - 2) | hash, dst, 2);
-                        dst += 2;
-                    }
-                    else
-                    {
-                        fast_write((ui32)(matchlen << 16) | hash, dst, 3);
-                        dst += 3;
-                    }
-                }
-                fetch = fast_read(src, 3);
-                lits = 0;
-            }
-            else
-            {
-                lits++;
-                *dst = *src;
-                src++;
-                dst++;
-                cword_val = (cword_val >> 1);
-#ifdef X86X64
-                fetch = fast_read(src, 3);
-#else
-                fetch = (fetch >> 8 & 0xffff) | (*(src + 2) << 16);
-#endif
-            }
-        }
-#elif QLZ_COMPRESSION_LEVEL >= 2
-        {
-            const unsigned char *o, *offset2;
-            ui32 hash, matchlen, k, m, best_k = 0;
-            unsigned char c;
-            size_t remaining = (last_byte - UNCOMPRESSED_END - src + 1) > 255 ? 255 : (last_byte - UNCOMPRESSED_END - src + 1);
-            (void)best_k;
-
-
-            //hash = hashat(src);
-            fetch = fast_read(src, 3);
-            hash = hash_func(fetch);
-
-            c = state->hash_counter[hash];
-
-            offset2 = state->hash[hash].offset[0];
-            if(offset2 < src - MINOFFSET && c > 0 && ((fast_read(offset2, 3) ^ fetch) & 0xffffff) == 0)
-            {
-                matchlen = 3;
-                if(*(offset2 + matchlen) == *(src + matchlen))
-                {
-                    matchlen = 4;
-                    while(*(offset2 + matchlen) == *(src + matchlen) && matchlen < remaining)
-                        matchlen++;
-                }
-            }
-            else
-                matchlen = 0;
-            for(k = 1; k < QLZ_POINTERS && c > k; k++)
-            {
-                o = state->hash[hash].offset[k];
-#if QLZ_COMPRESSION_LEVEL == 3
-                if(((fast_read(o, 3) ^ fetch) & 0xffffff) == 0 && o < src - MINOFFSET)
-#elif QLZ_COMPRESSION_LEVEL == 2
-                if(*(src + matchlen) == *(o + matchlen)    && ((fast_read(o, 3) ^ fetch) & 0xffffff) == 0 && o < src - MINOFFSET)
-#endif
-                {
-                    m = 3;
-                    while(*(o + m) == *(src + m) && m < remaining)
-                        m++;
-#if QLZ_COMPRESSION_LEVEL == 3
-                    if ((m > matchlen) || (m == matchlen && o > offset2))
-#elif QLZ_COMPRESSION_LEVEL == 2
-                    if (m > matchlen)
-#endif
-                    {
-                        offset2 = o;
-                        matchlen = m;
-                        best_k = k;
-                    }
-                }
-            }
-            o = offset2;
-            state->hash[hash].offset[c & (QLZ_POINTERS - 1)] = src;
-            c++;
-            state->hash_counter[hash] = c;
-
-#if QLZ_COMPRESSION_LEVEL == 3
-            if(matchlen > 2 && src - o < 131071)
-            {
-                ui32 u;
-                size_t offset = src - o;
-
-                for(u = 1; u < matchlen; u++)
-                {
-                    hash = hashat(src + u);
-                    c = state->hash_counter[hash]++;
-                    state->hash[hash].offset[c & (QLZ_POINTERS - 1)] = src + u;
-                }
-
-                cword_val = (cword_val >> 1) | (1U << 31);
-                src += matchlen;
-
-                if(matchlen == 3 && offset <= 63)
-                {
-                    *dst = (unsigned char)(offset << 2);
-                    dst++;
-                }
-                else if (matchlen == 3 && offset <= 16383)
-                {
-                    ui32 f = (ui32)((offset << 2) | 1);
-                    fast_write(f, dst, 2);
-                    dst += 2;
-                }
-                else if (matchlen <= 18 && offset <= 1023)
-                {
-                    ui32 f = ((matchlen - 3) << 2) | ((ui32)offset << 6) | 2;
-                    fast_write(f, dst, 2);
-                    dst += 2;
-                }
-
-                else if(matchlen <= 33)
-                {
-                    ui32 f = ((matchlen - 2) << 2) | ((ui32)offset << 7) | 3;
-                    fast_write(f, dst, 3);
-                    dst += 3;
-                }
-                else
-                {
-                    ui32 f = ((matchlen - 3) << 7) | ((ui32)offset << 15) | 3;
-                    fast_write(f, dst, 4);
-                    dst += 4;
-                }
-            }
-            else
-            {
-                *dst = *src;
-                src++;
-                dst++;
-                cword_val = (cword_val >> 1);
-            }
-#elif QLZ_COMPRESSION_LEVEL == 2
-
-            if(matchlen > 2)
-            {
-                cword_val = (cword_val >> 1) | (1U << 31);
-                src += matchlen;
-
-                if (matchlen < 10)
-                {
-                    ui32 f = best_k | ((matchlen - 2) << 2) | (hash << 5);
-                    fast_write(f, dst, 2);
-                    dst += 2;
-                }
-                else
-                {
-                    ui32 f = best_k | (matchlen << 16) | (hash << 5);
-                    fast_write(f, dst, 3);
-                    dst += 3;
-                }
-            }
-            else
-            {
-                *dst = *src;
-                src++;
-                dst++;
-                cword_val = (cword_val >> 1);
-            }
-#endif
-        }
-#endif
-    }
-    while (src <= last_byte)
-    {
-        if ((cword_val & 1) == 1)
-        {
-            fast_write((cword_val >> 1) | (1U << 31), cword_ptr, CWORD_LEN);
-            cword_ptr = dst;
-            dst += CWORD_LEN;
-            cword_val = 1U << 31;
-        }
-#if QLZ_COMPRESSION_LEVEL < 3
-        if (src <= last_byte - 3)
-        {
-#if QLZ_COMPRESSION_LEVEL == 1
-            ui32 hash, fetch;
-            fetch = fast_read(src, 3);
-            hash = hash_func(fetch);
-            state->hash[hash].offset = CAST(src - OFFSET_BASE);
-            state->hash[hash].cache = fetch;
-#elif QLZ_COMPRESSION_LEVEL == 2
-            ui32 hash;
-            unsigned char c;
-            hash = hashat(src);
-            c = state->hash_counter[hash];
-            state->hash[hash].offset[c & (QLZ_POINTERS - 1)] = src;
-            c++;
-            state->hash_counter[hash] = c;
-#endif
-        }
-#endif
-        *dst = *src;
-        src++;
-        dst++;
-        cword_val = (cword_val >> 1);
-    }
-
-    while((cword_val & 1) != 1)
-        cword_val = (cword_val >> 1);
-
-    fast_write((cword_val >> 1) | (1U << 31), cword_ptr, CWORD_LEN);
-
-    // min. size must be 9 bytes so that the qlz_size functions can take 9 bytes as argument
-    return dst - destination < 9 ? 9 : dst - destination;
-}
-
-static size_t qlz_decompress_core(const unsigned char *source, unsigned char *destination, size_t size, qlz_state_decompress *state, const unsigned char *history)
-{
-    const unsigned char *src = source + qlz_size_header((const char *)source);
-    unsigned char *dst = destination;
-    const unsigned char *last_destination_byte = destination + size - 1;
-    ui32 cword_val = 1;
-    const unsigned char *last_matchstart = last_destination_byte - UNCONDITIONAL_MATCHLEN - UNCOMPRESSED_END;
-    unsigned char *last_hashed = destination - 1;
-    const unsigned char *last_source_byte = source + qlz_size_compressed((const char *)source) - 1;
-    static const ui32 bitlut[16] = {4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0};
-
-    (void) last_source_byte;
-    (void) last_hashed;
-    (void) state;
-    (void) history;
-
-    for(;;)
-    {
-        ui32 fetch;
-
-        if (cword_val == 1)
-        {
-#ifdef QLZ_MEMORY_SAFE
-            if(src + CWORD_LEN - 1 > last_source_byte)
-                return 0;
-#endif
-            cword_val = fast_read(src, CWORD_LEN);
-            src += CWORD_LEN;
-        }
-
-#ifdef QLZ_MEMORY_SAFE
-        if(src + 4 - 1 > last_source_byte)
-                return 0;
-#endif
-
-        fetch = fast_read(src, 4);
-
-        if ((cword_val & 1) == 1)
-        {
-            ui32 matchlen;
-            const unsigned char *offset2;
-
-#if QLZ_COMPRESSION_LEVEL == 1
-            ui32 hash;
-            cword_val = cword_val >> 1;
-            hash = (fetch >> 4) & 0xfff;
-            offset2 = (const unsigned char *)(size_t)state->hash[hash].offset;
-
-            if((fetch & 0xf) != 0)
-            {
-                matchlen = (fetch & 0xf) + 2;
-                src += 2;
-            }
-            else
-            {
-                matchlen = *(src + 2);
-                src += 3;
-            }
-
-#elif QLZ_COMPRESSION_LEVEL == 2
-            ui32 hash;
-            unsigned char c;
-            cword_val = cword_val >> 1;
-            hash = (fetch >> 5) & 0x7ff;
-            c = (unsigned char)(fetch & 0x3);
-            offset2 = state->hash[hash].offset[c];
-
-            if((fetch & (28)) != 0)
-            {
-                matchlen = ((fetch >> 2) & 0x7) + 2;
-                src += 2;
-            }
-            else
-            {
-                matchlen = *(src + 2);
-                src += 3;
-            }
-
-#elif QLZ_COMPRESSION_LEVEL == 3
-            ui32 offset;
-            cword_val = cword_val >> 1;
-            if ((fetch & 3) == 0)
-            {
-                offset = (fetch & 0xff) >> 2;
-                matchlen = 3;
-                src++;
-            }
-            else if ((fetch & 2) == 0)
-            {
-                offset = (fetch & 0xffff) >> 2;
-                matchlen = 3;
-                src += 2;
-            }
-            else if ((fetch & 1) == 0)
-            {
-                offset = (fetch & 0xffff) >> 6;
-                matchlen = ((fetch >> 2) & 15) + 3;
-                src += 2;
-            }
-            else if ((fetch & 127) != 3)
-            {
-                offset = (fetch >> 7) & 0x1ffff;
-                matchlen = ((fetch >> 2) & 0x1f) + 2;
-                src += 3;
-            }
-            else
-            {
-                offset = (fetch >> 15);
-                matchlen = ((fetch >> 7) & 255) + 3;
-                src += 4;
-            }
-
-            offset2 = dst - offset;
-#endif
-
-#ifdef QLZ_MEMORY_SAFE
-            if(offset2 < history || offset2 > dst - MINOFFSET - 1)
-                return 0;
-
-            if(matchlen > (ui32)(last_destination_byte - dst - UNCOMPRESSED_END + 1))
-                return 0;
-#endif
-
-            memcpy_up(dst, offset2, matchlen);
-            dst += matchlen;
-
-#if QLZ_COMPRESSION_LEVEL <= 2
-            update_hash_upto(state, &last_hashed, dst - matchlen);
-            last_hashed = dst - 1;
-#endif
-        }
-        else
-        {
-            if (dst < last_matchstart)
-            {
-                unsigned int n = bitlut[cword_val & 0xf];
-#ifdef X86X64
-                *(ui32 *)dst = *(ui32 *)src;
-#else
-                memcpy_up(dst, src, 4);
-#endif
-                cword_val = cword_val >> n;
-                dst += n;
-                src += n;
-#if QLZ_COMPRESSION_LEVEL <= 2
-                update_hash_upto(state, &last_hashed, dst - 3);
-#endif
-            }
-            else
-            {
-                while(dst <= last_destination_byte)
-                {
-                    if (cword_val == 1)
-                    {
-                        src += CWORD_LEN;
-                        cword_val = 1U << 31;
-                    }
-#ifdef QLZ_MEMORY_SAFE
-                    if(src >= last_source_byte + 1)
-                        return 0;
-#endif
-                    *dst = *src;
-                    dst++;
-                    src++;
-                    cword_val = cword_val >> 1;
-                }
-
-#if QLZ_COMPRESSION_LEVEL <= 2
-                update_hash_upto(state, &last_hashed, last_destination_byte - 3); // todo, use constant
-#endif
-                return size;
-            }
-
-        }
-    }
-}
-
-size_t qlz_compress(const void *source, char *destination, size_t size, qlz_state_compress *state)
-{
-    size_t r;
-    ui32 compressed;
-    size_t base;
-
-    if(size == 0 || size > 0xffffffff - 400)
-        return 0;
-
-    if(size < 216)
-        base = 3;
-    else
-        base = 9;
-
-#if QLZ_STREAMING_BUFFER > 0
-    if (state->stream_counter + size - 1 >= QLZ_STREAMING_BUFFER)
-#endif
-    {
-        reset_table_compress(state);
-        r = base + qlz_compress_core((const unsigned char *)source, (unsigned char*)destination + base, size, state);
-#if QLZ_STREAMING_BUFFER > 0
-        reset_table_compress(state);
-#endif
-        if(r == base)
-        {
-            memcpy(destination + base, source, size);
-            r = size + base;
-            compressed = 0;
-        }
-        else
-        {
-            compressed = 1;
-        }
-        state->stream_counter = 0;
-    }
-#if QLZ_STREAMING_BUFFER > 0
-    else
-    {
-        unsigned char *src = state->stream_buffer + state->stream_counter;
-
-        memcpy(src, source, size);
-        r = base + qlz_compress_core(src, (unsigned char*)destination + base, size, state);
-
-         if(r == base)
-        {
-            memcpy(destination + base, src, size);
-            r = size + base;
-            compressed = 0;
-            reset_table_compress(state);
-        }
-        else
-        {
-            compressed = 1;
-        }
-        state->stream_counter += size;
-    }
-#endif
-    if(base == 3)
-    {
-        *destination = (unsigned char)(0 | compressed);
-        *(destination + 1) = (unsigned char)r;
-        *(destination + 2) = (unsigned char)size;
-    }
-    else
-    {
-        *destination = (unsigned char)(2 | compressed);
-        fast_write((ui32)r, destination + 1, 4);
-        fast_write((ui32)size, destination + 5, 4);
-    }
-
-    *destination |= (QLZ_COMPRESSION_LEVEL << 2);
-    *destination |= (1 << 6);
-    *destination |= ((QLZ_STREAMING_BUFFER == 0 ? 0 : (QLZ_STREAMING_BUFFER == 100000 ? 1 : (QLZ_STREAMING_BUFFER == 1000000 ? 2 : 3))) << 4);
-
-// 76543210
-// 01SSLLHC
-
-    return r;
-}
-
-size_t qlz_decompress(const char *source, void *destination, qlz_state_decompress *state)
-{
-    size_t dsiz = qlz_size_decompressed(source);
-
-#if QLZ_STREAMING_BUFFER > 0
-    if (state->stream_counter + qlz_size_decompressed(source) - 1 >= QLZ_STREAMING_BUFFER)
-#endif
-    {
-        if((*source & 1) == 1)
-        {
-            reset_table_decompress(state);
-            dsiz = qlz_decompress_core((const unsigned char *)source, (unsigned char *)destination, dsiz, state, (const unsigned char *)destination);
-        }
-        else
-        {
-            memcpy(destination, source + qlz_size_header(source), dsiz);
-        }
-        state->stream_counter = 0;
-        reset_table_decompress(state);
-    }
-#if QLZ_STREAMING_BUFFER > 0
-    else
-    {
-        unsigned char *dst = state->stream_buffer + state->stream_counter;
-        if((*source & 1) == 1)
-        {
-            dsiz = qlz_decompress_core((const unsigned char *)source, dst, dsiz, state, (const unsigned char *)state->stream_buffer);
-        }
-        else
-        {
-            memcpy(dst, source + qlz_size_header(source), dsiz);
-            reset_table_decompress(state);
-        }
-        memcpy(destination, dst, dsiz);
-        state->stream_counter += dsiz;
-    }
-#endif
-    return dsiz;
-}

src/qlz/QuickLZ_L3.cpp

@@ -1,843 +0,0 @@
-// Fast data compression library
-// Copyright (C) 2006-2011 Lasse Mikkel Reinhold
-// lar@quicklz.com
-//
-// QuickLZ can be used for free under the GPL 1, 2 or 3 license (where anything
-// released into public must be open source) or under a commercial license if such
-// has been acquired (see http://www.quicklz.com/order.html). The commercial license
-// does not cover derived or ported versions created by third parties under GPL.
-
-// 1.5.0 final
-
-#define QLZ_COMPRESSION_LEVEL 3
-#include "QuickLZ.h"
-
-#if QLZ_VERSION_MAJOR != 1 || QLZ_VERSION_MINOR != 5 || QLZ_VERSION_REVISION != 0
-#error quicklz.c and quicklz.h have different versions
-#endif
-
-#if (defined(__X86__) || defined(__i386__) || defined(i386) || defined(_M_IX86) || defined(__386__) || defined(__x86_64__) || defined(_M_X64))
-#define X86X64
-#endif
-
-#define MINOFFSET 2
-#define UNCONDITIONAL_MATCHLEN 6
-#define UNCOMPRESSED_END 4
-#define CWORD_LEN 4
-
-#if QLZ_COMPRESSION_LEVEL == 1 && defined QLZ_PTR_64 && QLZ_STREAMING_BUFFER == 0
-#define OFFSET_BASE source
-    #define CAST (ui32)(size_t)
-#else
-#define OFFSET_BASE 0
-#define CAST
-#endif
-
-int qlz_get_setting(int setting)
-{
-    switch (setting)
-    {
-        case 0: return QLZ_COMPRESSION_LEVEL;
-        case 1: return sizeof(qlz_state_compress);
-        case 2: return sizeof(qlz_state_decompress);
-        case 3: return QLZ_STREAMING_BUFFER;
-#ifdef QLZ_MEMORY_SAFE
-            case 6: return 1;
-#else
-        case 6: return 0;
-#endif
-        case 7: return QLZ_VERSION_MAJOR;
-        case 8: return QLZ_VERSION_MINOR;
-        case 9: return QLZ_VERSION_REVISION;
-    }
-    return -1;
-}
-
-#if QLZ_COMPRESSION_LEVEL == 1
-static int same(const unsigned char *src, size_t n)
-{
-    while(n > 0 && *(src + n) == *src)
-        n--;
-    return n == 0 ? 1 : 0;
-}
-#endif
-
-static void reset_table_compress(qlz_state_compress *state)
-{
-    int i;
-    for(i = 0; i < QLZ_HASH_VALUES; i++)
-    {
-#if QLZ_COMPRESSION_LEVEL == 1
-        state->hash[i].offset = 0;
-#else
-        state->hash_counter[i] = 0;
-#endif
-    }
-}
-
-static void reset_table_decompress(qlz_state_decompress *state)
-{
-    int i;
-    (void)state;
-    (void)i;
-#if QLZ_COMPRESSION_LEVEL == 2
-    for(i = 0; i < QLZ_HASH_VALUES; i++)
-    {
-        state->hash_counter[i] = 0;
-    }
-#endif
-}
-
-static __inline ui32 hash_func(ui32 i)
-{
-#if QLZ_COMPRESSION_LEVEL == 2
-    return ((i >> 9) ^ (i >> 13) ^ i) & (QLZ_HASH_VALUES - 1);
-#else
-    return ((i >> 12) ^ i) & (QLZ_HASH_VALUES - 1);
-#endif
-}
-
-static __inline ui32 fast_read(void const *src, ui32 bytes)
-{
-#ifndef X86X64
-    unsigned char *p = (unsigned char*)src;
-    switch (bytes)
-    {
-        case 4:
-            return(*p | *(p + 1) << 8 | *(p + 2) << 16 | *(p + 3) << 24);
-        case 3:
-            return(*p | *(p + 1) << 8 | *(p + 2) << 16);
-        case 2:
-            return(*p | *(p + 1) << 8);
-        case 1:
-            return(*p);
-    }
-    return 0;
-#else
-    if (bytes >= 1 && bytes <= 4)
-        return *((ui32*)src);
-    else
-        return 0;
-#endif
-}
-
-static __inline ui32 hashat(const unsigned char *src)
-{
-    ui32 fetch, hash;
-    fetch = fast_read(src, 3);
-    hash = hash_func(fetch);
-    return hash;
-}
-
-static __inline void fast_write(ui32 f, void *dst, size_t bytes)
-{
-#ifndef X86X64
-    unsigned char *p = (unsigned char*)dst;
-
-    switch (bytes)
-    {
-        case 4:
-            *p = (unsigned char)f;
-            *(p + 1) = (unsigned char)(f >> 8);
-            *(p + 2) = (unsigned char)(f >> 16);
-            *(p + 3) = (unsigned char)(f >> 24);
-            return;
-        case 3:
-            *p = (unsigned char)f;
-            *(p + 1) = (unsigned char)(f >> 8);
-            *(p + 2) = (unsigned char)(f >> 16);
-            return;
-        case 2:
-            *p = (unsigned char)f;
-            *(p + 1) = (unsigned char)(f >> 8);
-            return;
-        case 1:
-            *p = (unsigned char)f;
-            return;
-    }
-#else
-    switch (bytes)
-    {
-        case 4:
-            *((ui32*)dst) = f;
-            return;
-        case 3:
-            *((ui32*)dst) = f;
-            return;
-        case 2:
-            *((ui16 *)dst) = (ui16)f;
-            return;
-        case 1:
-            *((unsigned char*)dst) = (unsigned char)f;
-            return;
-    }
-#endif
-}
-
-
-size_t qlz_size_decompressed(const char *source)
-{
-    ui32 n, r;
-    n = (((*source) & 2) == 2) ? 4 : 1;
-    r = fast_read(source + 1 + n, n);
-    r = r & (0xffffffff >> ((4 - n)*8));
-    return r;
-}
-
-size_t qlz_size_compressed(const char *source)
-{
-    ui32 n, r;
-    n = (((*source) & 2) == 2) ? 4 : 1;
-    r = fast_read(source + 1, n);
-    r = r & (0xffffffff >> ((4 - n)*8));
-    return r;
-}
-
-
-static __inline void memcpy_up(unsigned char *dst, const unsigned char *src, ui32 n)
-{
-    // Caution if modifying memcpy_up! Overlap of dst and src must be special handled.
-#ifndef X86X64
-    unsigned char *end = dst + n;
-    while(dst < end)
-    {
-        *dst = *src;
-        dst++;
-        src++;
-    }
-#else
-    ui32 f = 0;
-    do
-    {
-        *(ui32 *)(dst + f) = *(ui32 *)(src + f);
-        f += MINOFFSET + 1;
-    }
-    while (f < n);
-#endif
-}
-
-static __inline void update_hash(qlz_state_decompress *state, const unsigned char *s)
-{
-#if QLZ_COMPRESSION_LEVEL == 1
-    ui32 hash;
-    hash = hashat(s);
-    state->hash[hash].offset = s;
-    state->hash_counter[hash] = 1;
-#elif QLZ_COMPRESSION_LEVEL == 2
-    ui32 hash;
-    unsigned char c;
-    hash = hashat(s);
-    c = state->hash_counter[hash];
-    state->hash[hash].offset[c & (QLZ_POINTERS - 1)] = s;
-    c++;
-    state->hash_counter[hash] = c;
-#endif
-    (void)state;
-    (void)s;
-}
-
-#if QLZ_COMPRESSION_LEVEL <= 2
-static void update_hash_upto(qlz_state_decompress *state, unsigned char **lh, const unsigned char *max)
-{
-    while(*lh < max)
-    {
-        (*lh)++;
-        update_hash(state, *lh);
-    }
-}
-#endif
-
-static size_t qlz_compress_core(const unsigned char *source, unsigned char *destination, size_t size, qlz_state_compress *state)
-{
-    const unsigned char *last_byte = source + size - 1;
-    const unsigned char *src = source;
-    unsigned char *cword_ptr = destination;
-    unsigned char *dst = destination + CWORD_LEN;
-    ui32 cword_val = 1U << 31;
-    const unsigned char *last_matchstart = last_byte - UNCONDITIONAL_MATCHLEN - UNCOMPRESSED_END;
-    ui32 fetch = 0;
-    unsigned int lits = 0;
-
-    (void) lits;
-
-    if(src <= last_matchstart)
-        fetch = fast_read(src, 3);
-
-    while(src <= last_matchstart)
-    {
-        if ((cword_val & 1) == 1)
-        {
-            // store uncompressed if compression ratio is too low
-            if (src > source + (size >> 1) && dst - destination > src - source - ((src - source) >> 5))
-                return 0;
-
-            fast_write((cword_val >> 1) | (1U << 31), cword_ptr, CWORD_LEN);
-
-            cword_ptr = dst;
-            dst += CWORD_LEN;
-            cword_val = 1U << 31;
-            fetch = fast_read(src, 3);
-        }
-#if QLZ_COMPRESSION_LEVEL == 1
-        {
-            const unsigned char *o;
-            ui32 hash, cached;
-
-            hash = hash_func(fetch);
-            cached = fetch ^ state->hash[hash].cache;
-            state->hash[hash].cache = fetch;
-
-            o = state->hash[hash].offset + OFFSET_BASE;
-            state->hash[hash].offset = CAST(src - OFFSET_BASE);
-
-#ifdef X86X64
-            if ((cached & 0xffffff) == 0 && o != OFFSET_BASE && (src - o > MINOFFSET || (src == o + 1 && lits >= 3 && src > source + 3 && same(src - 3, 6))))
-            {
-                if(cached != 0)
-                {
-#else
-            if (cached == 0 && o != OFFSET_BASE && (src - o > MINOFFSET || (src == o + 1 && lits >= 3 && src > source + 3 && same(src - 3, 6))))
-            {
-                if (*(o + 3) != *(src + 3))
-                {
-#endif
-                    hash <<= 4;
-                    cword_val = (cword_val >> 1) | (1U << 31);
-                    fast_write((3 - 2) | hash, dst, 2);
-                    src += 3;
-                    dst += 2;
-                }
-                else
-                {
-                    const unsigned char *old_src = src;
-                    size_t matchlen;
-                    hash <<= 4;
-
-                    cword_val = (cword_val >> 1) | (1U << 31);
-                    src += 4;
-
-                    if(*(o + (src - old_src)) == *src)
-                    {
-                        src++;
-                        if(*(o + (src - old_src)) == *src)
-                        {
-                            size_t q = last_byte - UNCOMPRESSED_END - (src - 5) + 1;
-                            size_t remaining = q > 255 ? 255 : q;
-                            src++;
-                            while(*(o + (src - old_src)) == *src && (size_t)(src - old_src) < remaining)
-                                src++;
-                        }
-                    }
-
-                    matchlen = src - old_src;
-                    if (matchlen < 18)
-                    {
-                        fast_write((ui32)(matchlen - 2) | hash, dst, 2);
-                        dst += 2;
-                    }
-                    else
-                    {
-                        fast_write((ui32)(matchlen << 16) | hash, dst, 3);
-                        dst += 3;
-                    }
-                }
-                fetch = fast_read(src, 3);
-                lits = 0;
-            }
-            else
-            {
-                lits++;
-                *dst = *src;
-                src++;
-                dst++;
-                cword_val = (cword_val >> 1);
-#ifdef X86X64
-                fetch = fast_read(src, 3);
-#else
-                fetch = (fetch >> 8 & 0xffff) | (*(src + 2) << 16);
-#endif
-            }
-        }
-#elif QLZ_COMPRESSION_LEVEL >= 2
-        {
-            const unsigned char *o, *offset2;
-            ui32 hash, matchlen, k, m, best_k = 0;
-            unsigned char c;
-            size_t remaining = (last_byte - UNCOMPRESSED_END - src + 1) > 255 ? 255 : (last_byte - UNCOMPRESSED_END - src + 1);
-            (void)best_k;
-
-
-            //hash = hashat(src);
-            fetch = fast_read(src, 3);
-            hash = hash_func(fetch);
-
-            c = state->hash_counter[hash];
-
-            offset2 = state->hash[hash].offset[0];
-            if(offset2 < src - MINOFFSET && c > 0 && ((fast_read(offset2, 3) ^ fetch) & 0xffffff) == 0)
-            {
-                matchlen = 3;
-                if(*(offset2 + matchlen) == *(src + matchlen))
-                {
-                    matchlen = 4;
-                    while(*(offset2 + matchlen) == *(src + matchlen) && matchlen < remaining)
-                        matchlen++;
-                }
-            }
-            else
-                matchlen = 0;
-            for(k = 1; k < QLZ_POINTERS && c > k; k++)
-            {
-                o = state->hash[hash].offset[k];
-#if QLZ_COMPRESSION_LEVEL == 3
-                if(((fast_read(o, 3) ^ fetch) & 0xffffff) == 0 && o < src - MINOFFSET)
-#elif QLZ_COMPRESSION_LEVEL == 2
-                if(*(src + matchlen) == *(o + matchlen)    && ((fast_read(o, 3) ^ fetch) & 0xffffff) == 0 && o < src - MINOFFSET)
-#endif
-                {
-                    m = 3;
-                    while(*(o + m) == *(src + m) && m < remaining)
-                        m++;
-#if QLZ_COMPRESSION_LEVEL == 3
-                    if ((m > matchlen) || (m == matchlen && o > offset2))
-#elif QLZ_COMPRESSION_LEVEL == 2
-                    if (m > matchlen)
-#endif
-                    {
-                        offset2 = o;
-                        matchlen = m;
-                        best_k = k;
-                    }
-                }
-            }
-            o = offset2;
-            state->hash[hash].offset[c & (QLZ_POINTERS - 1)] = src;
-            c++;
-            state->hash_counter[hash] = c;
-
-#if QLZ_COMPRESSION_LEVEL == 3
-            if(matchlen > 2 && src - o < 131071)
-            {
-                ui32 u;
-                size_t offset = src - o;
-
-                for(u = 1; u < matchlen; u++)
-                {
-                    hash = hashat(src + u);
-                    c = state->hash_counter[hash]++;
-                    state->hash[hash].offset[c & (QLZ_POINTERS - 1)] = src + u;
-                }
-
-                cword_val = (cword_val >> 1) | (1U << 31);
-                src += matchlen;
-
-                if(matchlen == 3 && offset <= 63)
-                {
-                    *dst = (unsigned char)(offset << 2);
-                    dst++;
-                }
-                else if (matchlen == 3 && offset <= 16383)
-                {
-                    ui32 f = (ui32)((offset << 2) | 1);
-                    fast_write(f, dst, 2);
-                    dst += 2;
-                }
-                else if (matchlen <= 18 && offset <= 1023)
-                {
-                    ui32 f = ((matchlen - 3) << 2) | ((ui32)offset << 6) | 2;
-                    fast_write(f, dst, 2);
-                    dst += 2;
-                }
-
-                else if(matchlen <= 33)
-                {
-                    ui32 f = ((matchlen - 2) << 2) | ((ui32)offset << 7) | 3;
-                    fast_write(f, dst, 3);
-                    dst += 3;
-                }
-                else
-                {
-                    ui32 f = ((matchlen - 3) << 7) | ((ui32)offset << 15) | 3;
-                    fast_write(f, dst, 4);
-                    dst += 4;
-                }
-            }
-            else
-            {
-                *dst = *src;
-                src++;
-                dst++;
-                cword_val = (cword_val >> 1);
-            }
-#elif QLZ_COMPRESSION_LEVEL == 2
-
-            if(matchlen > 2)
-            {
-                cword_val = (cword_val >> 1) | (1U << 31);
-                src += matchlen;
-
-                if (matchlen < 10)
-                {
-                    ui32 f = best_k | ((matchlen - 2) << 2) | (hash << 5);
-                    fast_write(f, dst, 2);
-                    dst += 2;
-                }
-                else
-                {
-                    ui32 f = best_k | (matchlen << 16) | (hash << 5);
-                    fast_write(f, dst, 3);
-                    dst += 3;
-                }
-            }
-            else
-            {
-                *dst = *src;
-                src++;
-                dst++;
-                cword_val = (cword_val >> 1);
-            }
-#endif
-        }
-#endif
-    }
-    while (src <= last_byte)
-    {
-        if ((cword_val & 1) == 1)
-        {
-            fast_write((cword_val >> 1) | (1U << 31), cword_ptr, CWORD_LEN);
-            cword_ptr = dst;
-            dst += CWORD_LEN;
-            cword_val = 1U << 31;
-        }
-#if QLZ_COMPRESSION_LEVEL < 3
-        if (src <= last_byte - 3)
-        {
-#if QLZ_COMPRESSION_LEVEL == 1
-            ui32 hash, fetch;
-            fetch = fast_read(src, 3);
-            hash = hash_func(fetch);
-            state->hash[hash].offset = CAST(src - OFFSET_BASE);
-            state->hash[hash].cache = fetch;
-#elif QLZ_COMPRESSION_LEVEL == 2
-            ui32 hash;
-            unsigned char c;
-            hash = hashat(src);
-            c = state->hash_counter[hash];
-            state->hash[hash].offset[c & (QLZ_POINTERS - 1)] = src;
-            c++;
-            state->hash_counter[hash] = c;
-#endif
-        }
-#endif
-        *dst = *src;
-        src++;
-        dst++;
-        cword_val = (cword_val >> 1);
-    }
-
-    while((cword_val & 1) != 1)
-        cword_val = (cword_val >> 1);
-
-    fast_write((cword_val >> 1) | (1U << 31), cword_ptr, CWORD_LEN);
-
-    // min. size must be 9 bytes so that the qlz_size functions can take 9 bytes as argument
-    return dst - destination < 9 ? 9 : dst - destination;
-}
-
-extern size_t qlz_size_header(const char *source);
-static size_t qlz_decompress_core(const unsigned char *source, unsigned char *destination, size_t size, qlz_state_decompress *state, const unsigned char *history)
-{
-    const unsigned char *src = source + qlz_size_header((const char *)source);
-    unsigned char *dst = destination;
-    const unsigned char *last_destination_byte = destination + size - 1;
-    ui32 cword_val = 1;
-    const unsigned char *last_matchstart = last_destination_byte - UNCONDITIONAL_MATCHLEN - UNCOMPRESSED_END;
-    unsigned char *last_hashed = destination - 1;
-    const unsigned char *last_source_byte = source + qlz_size_compressed((const char *)source) - 1;
-    static const ui32 bitlut[16] = {4, 0, 1, 0, 2, 0, 1, 0, 3, 0, 1, 0, 2, 0, 1, 0};
-
-    (void) last_source_byte;
-    (void) last_hashed;
-    (void) state;
-    (void) history;
-
-    for(;;)
-    {
-        ui32 fetch;
-
-        if (cword_val == 1)
-        {
-#ifdef QLZ_MEMORY_SAFE
-            if(src + CWORD_LEN - 1 > last_source_byte)
-                return 0;
-#endif
-            cword_val = fast_read(src, CWORD_LEN);
-            src += CWORD_LEN;
-        }
-
-#ifdef QLZ_MEMORY_SAFE
-        if(src + 4 - 1 > last_source_byte)
-                return 0;
-#endif
-
-        fetch = fast_read(src, 4);
-
-        if ((cword_val & 1) == 1)
-        {
-            ui32 matchlen;
-            const unsigned char *offset2;
-
-#if QLZ_COMPRESSION_LEVEL == 1
-            ui32 hash;
-            cword_val = cword_val >> 1;
-            hash = (fetch >> 4) & 0xfff;
-            offset2 = (const unsigned char *)(size_t)state->hash[hash].offset;
-
-            if((fetch & 0xf) != 0)
-            {
-                matchlen = (fetch & 0xf) + 2;
-                src += 2;
-            }
-            else
-            {
-                matchlen = *(src + 2);
-                src += 3;
-            }
-
-#elif QLZ_COMPRESSION_LEVEL == 2
-            ui32 hash;
-            unsigned char c;
-            cword_val = cword_val >> 1;
-            hash = (fetch >> 5) & 0x7ff;
-            c = (unsigned char)(fetch & 0x3);
-            offset2 = state->hash[hash].offset[c];
-
-            if((fetch & (28)) != 0)
-            {
-                matchlen = ((fetch >> 2) & 0x7) + 2;
-                src += 2;
-            }
-            else
-            {
-                matchlen = *(src + 2);
-                src += 3;
-            }
-
-#elif QLZ_COMPRESSION_LEVEL == 3
-            ui32 offset;
-            cword_val = cword_val >> 1;
-            if ((fetch & 3) == 0)
-            {
-                offset = (fetch & 0xff) >> 2;
-                matchlen = 3;
-                src++;
-            }
-            else if ((fetch & 2) == 0)
-            {
-                offset = (fetch & 0xffff) >> 2;
-                matchlen = 3;
-                src += 2;
-            }
-            else if ((fetch & 1) == 0)
-            {
-                offset = (fetch & 0xffff) >> 6;
-                matchlen = ((fetch >> 2) & 15) + 3;
-                src += 2;
-            }
-            else if ((fetch & 127) != 3)
-            {
-                offset = (fetch >> 7) & 0x1ffff;
-                matchlen = ((fetch >> 2) & 0x1f) + 2;
-                src += 3;
-            }
-            else
-            {
-                offset = (fetch >> 15);
-                matchlen = ((fetch >> 7) & 255) + 3;
-                src += 4;
-            }
-
-            offset2 = dst - offset;
-#endif
-
-#ifdef QLZ_MEMORY_SAFE
-            if(offset2 < history || offset2 > dst - MINOFFSET - 1)
-                return 0;
-
-            if(matchlen > (ui32)(last_destination_byte - dst - UNCOMPRESSED_END + 1))
-                return 0;
-#endif
-
-            memcpy_up(dst, offset2, matchlen);
-            dst += matchlen;
-
-#if QLZ_COMPRESSION_LEVEL <= 2
-            update_hash_upto(state, &last_hashed, dst - matchlen);
-            last_hashed = dst - 1;
-#endif
-        }
-        else
-        {
-            if (dst < last_matchstart)
-            {
-                unsigned int n = bitlut[cword_val & 0xf];
-#ifdef X86X64
-                *(ui32 *)dst = *(ui32 *)src;
-#else
-                memcpy_up(dst, src, 4);
-#endif
-                cword_val = cword_val >> n;
-                dst += n;
-                src += n;
-#if QLZ_COMPRESSION_LEVEL <= 2
-                update_hash_upto(state, &last_hashed, dst - 3);
-#endif
-            }
-            else
-            {
-                while(dst <= last_destination_byte)
-                {
-                    if (cword_val == 1)
-                    {
-                        src += CWORD_LEN;
-                        cword_val = 1U << 31;
-                    }
-#ifdef QLZ_MEMORY_SAFE
-                    if(src >= last_source_byte + 1)
-                        return 0;
-#endif
-                    *dst = *src;
-                    dst++;
-                    src++;
-                    cword_val = cword_val >> 1;
-                }
-
-#if QLZ_COMPRESSION_LEVEL <= 2
-                update_hash_upto(state, &last_hashed, last_destination_byte - 3); // todo, use constant
-#endif
-                return size;
-            }
-
-        }
-    }
-}
-
-size_t qlz_compress(const void *source, char *destination, size_t size, qlz_state_compress *state)
-{
-    size_t r;
-    ui32 compressed;
-    size_t base;
-
-    if(size == 0 || size > 0xffffffff - 400)
-        return 0;
-
-    if(size < 216)
-        base = 3;
-    else
-        base = 9;
-
-#if QLZ_STREAMING_BUFFER > 0
-    if (state->stream_counter + size - 1 >= QLZ_STREAMING_BUFFER)
-#endif
-    {
-        reset_table_compress(state);
-        r = base + qlz_compress_core((const unsigned char *)source, (unsigned char*)destination + base, size, state);
-#if QLZ_STREAMING_BUFFER > 0
-        reset_table_compress(state);
-#endif
-        if(r == base)
-        {
-            memcpy(destination + base, source, size);
-            r = size + base;
-            compressed = 0;
-        }
-        else
-        {
-            compressed = 1;
-        }
-        state->stream_counter = 0;
-    }
-#if QLZ_STREAMING_BUFFER > 0
-    else
-    {
-        unsigned char *src = state->stream_buffer + state->stream_counter;
-
-        memcpy(src, source, size);
-        r = base + qlz_compress_core(src, (unsigned char*)destination + base, size, state);
-
-         if(r == base)
-        {
-            memcpy(destination + base, src, size);
-            r = size + base;
-            compressed = 0;
-            reset_table_compress(state);
-        }
-        else
-        {
-            compressed = 1;
-        }
-        state->stream_counter += size;
-    }
-#endif
-    if(base == 3)
-    {
-        *destination = (unsigned char)(0 | compressed);
-        *(destination + 1) = (unsigned char)r;
-        *(destination + 2) = (unsigned char)size;
-    }
-    else
-    {
-        *destination = (unsigned char)(2 | compressed);
-        fast_write((ui32)r, destination + 1, 4);
-        fast_write((ui32)size, destination + 5, 4);
-    }
-
-    *destination |= (QLZ_COMPRESSION_LEVEL << 2);
-    *destination |= (1 << 6);
-    *destination |= ((QLZ_STREAMING_BUFFER == 0 ? 0 : (QLZ_STREAMING_BUFFER == 100000 ? 1 : (QLZ_STREAMING_BUFFER == 1000000 ? 2 : 3))) << 4);
-
-// 76543210
-// 01SSLLHC
-
-    return r;
-}
-
-size_t qlz_decompress(const char *source, void *destination, qlz_state_decompress *state)
-{
-    size_t dsiz = qlz_size_decompressed(source);
-
-#if QLZ_STREAMING_BUFFER > 0
-    if (state->stream_counter + qlz_size_decompressed(source) - 1 >= QLZ_STREAMING_BUFFER)
-#endif
-    {
-        if((*source & 1) == 1)
-        {
-            reset_table_decompress(state);
-            dsiz = qlz_decompress_core((const unsigned char *)source, (unsigned char *)destination, dsiz, state, (const unsigned char *)destination);
-        }
-        else
-        {
-            memcpy(destination, source + qlz_size_header(source), dsiz);
-        }
-        state->stream_counter = 0;
-        reset_table_decompress(state);
-    }
-#if QLZ_STREAMING_BUFFER > 0
-    else
-    {
-        unsigned char *dst = state->stream_buffer + state->stream_counter;
-        if((*source & 1) == 1)
-        {
-            dsiz = qlz_decompress_core((const unsigned char *)source, dst, dsiz, state, (const unsigned char *)state->stream_buffer);
-        }
-        else
-        {
-            memcpy(dst, source + qlz_size_header(source), dsiz);
-            reset_table_decompress(state);
-        }
-        memcpy(destination, dst, dsiz);
-        state->stream_counter += dsiz;
-    }
-#endif
-    return dsiz;
-}

test/generationTest.cpp

@@ -34,7 +34,7 @@ test_vector_t swap_elements(test_vector_t vector, int per, int max_distance) {
 }
 
 bool test_vector(const std::string_view& name, const test_vector_t& vector) {
-    generation_estimator gen{};
+    GenerationEstimator gen{};
 
     size_t last_value{0}, last_gen{0}, index{0};
     for(auto [id, exp] : vector) {
@@ -50,7 +50,7 @@ bool test_vector(const std::string_view& name, const test_vector_t& vector) {
 }
 
 template <size_t N>
-bool test_vector(generation_estimator& generator, const std::array<uint16_t, N>& packet_ids, const std::array<uint16_t, N>& expected) {
+bool test_vector(GenerationEstimator& generator, const std::array<uint16_t, N>& packet_ids, const std::array<uint16_t, N>& expected) {
     for(size_t index = 0; index < N; index++) {
         auto result = generator.visit_packet(packet_ids[index]);
         if(result != expected[index]) {
@@ -67,7 +67,7 @@ bool test_vector(generation_estimator& generator, const std::array<uint16_t, N>&
 }
 
 int main() {
-    generation_estimator gen{};
+    GenerationEstimator gen{};
 
     {
         test_vector("00 loss", generate_test_vector(0x30000, 0));