mirror of
https://github.com/dj0abr/SSB_HighSpeed_Modem.git
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228 lines
7.5 KiB
C++
228 lines
7.5 KiB
C++
/*
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(**************************************************************************)
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(* *)
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(* Schifra *)
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(* Reed-Solomon Error Correcting Code Library *)
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(* *)
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(* Release Version 0.0.1 *)
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(* http://www.schifra.com *)
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(* Copyright (c) 2000-2020 Arash Partow, All Rights Reserved. *)
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(* *)
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(* The Schifra Reed-Solomon error correcting code library and all its *)
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(* components are supplied under the terms of the General Schifra License *)
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(* agreement. The contents of the Schifra Reed-Solomon error correcting *)
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(* code library and all its components may not be copied or disclosed *)
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(* except in accordance with the terms of that agreement. *)
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(* *)
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(* URL: http://www.schifra.com/license.html *)
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(* *)
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(**************************************************************************)
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*/
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#ifndef INCLUDE_SCHIFRA_FILEIO_HPP
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#define INCLUDE_SCHIFRA_FILEIO_HPP
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#include <iostream>
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#include <iterator>
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#include <fstream>
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#include <string>
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#include <vector>
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#include "schifra_crc.hpp"
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namespace schifra
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{
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namespace fileio
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{
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inline void read_into_vector(const std::string& file_name, std::vector<std::string>& buffer)
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{
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std::ifstream file(file_name.c_str());
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if (!file) return;
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std::string line;
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while (std::getline(file,line))
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{
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buffer.push_back(line);
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}
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file.close();
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}
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inline void write_from_vector(const std::string& file_name, const std::vector<std::string>& buffer)
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{
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std::ofstream file(file_name.c_str());
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if (!file) return;
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std::ostream_iterator <std::string> os(file,"\n");
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std::copy(buffer.begin(),buffer.end(), os);
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file.close();
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}
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inline bool file_exists(const std::string& file_name)
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{
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std::ifstream file(file_name.c_str(), std::ios::binary);
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return ((!file) ? false : true);
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}
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inline std::size_t file_size(const std::string& file_name)
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{
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std::ifstream file(file_name.c_str(),std::ios::binary);
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if (!file) return 0;
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file.seekg (0, std::ios::end);
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return static_cast<std::size_t>(file.tellg());
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}
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inline void load_file(const std::string& file_name, std::string& buffer)
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{
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std::ifstream file(file_name.c_str(), std::ios::binary);
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if (!file) return;
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buffer.assign(std::istreambuf_iterator<char>(file),std::istreambuf_iterator<char>());
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file.close();
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}
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inline void load_file(const std::string& file_name, char** buffer, std::size_t& buffer_size)
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{
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std::ifstream in_stream(file_name.c_str(),std::ios::binary);
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if (!in_stream) return;
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buffer_size = file_size(file_name);
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*buffer = new char[buffer_size];
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in_stream.read(*buffer,static_cast<std::streamsize>(buffer_size));
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in_stream.close();
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}
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inline void write_file(const std::string& file_name, const std::string& buffer)
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{
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std::ofstream file(file_name.c_str(),std::ios::binary);
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file << buffer;
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file.close();
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}
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inline void write_file(const std::string& file_name, char* buffer, const std::size_t& buffer_size)
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{
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std::ofstream out_stream(file_name.c_str(),std::ios::binary);
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if (!out_stream) return;
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out_stream.write(buffer,static_cast<std::streamsize>(buffer_size));
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out_stream.close();
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}
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inline bool copy_file(const std::string& src_file_name, const std::string& dest_file_name)
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{
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std::ifstream src_file(src_file_name.c_str(),std::ios::binary);
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std::ofstream dest_file(dest_file_name.c_str(),std::ios::binary);
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if (!src_file) return false;
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if (!dest_file) return false;
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const std::size_t block_size = 1024;
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char buffer[block_size];
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std::size_t remaining_bytes = file_size(src_file_name);
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while (remaining_bytes >= block_size)
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{
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src_file.read(&buffer[0],static_cast<std::streamsize>(block_size));
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dest_file.write(&buffer[0],static_cast<std::streamsize>(block_size));
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remaining_bytes -= block_size;
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}
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if (remaining_bytes > 0)
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{
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src_file.read(&buffer[0],static_cast<std::streamsize>(remaining_bytes));
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dest_file.write(&buffer[0],static_cast<std::streamsize>(remaining_bytes));
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remaining_bytes = 0;
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}
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src_file.close();
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dest_file.close();
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return true;
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}
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inline bool files_identical(const std::string& file_name1, const std::string& file_name2)
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{
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std::ifstream file1(file_name1.c_str(),std::ios::binary);
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std::ifstream file2(file_name2.c_str(),std::ios::binary);
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if (!file1) return false;
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if (!file2) return false;
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if (file_size(file_name1) != file_size(file_name2)) return false;
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const std::size_t block_size = 1024;
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char buffer1[block_size];
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char buffer2[block_size];
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std::size_t remaining_bytes = file_size(file_name1);
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while (remaining_bytes >= block_size)
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{
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file1.read(&buffer1[0],static_cast<std::streamsize>(block_size));
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file2.read(&buffer2[0],static_cast<std::streamsize>(block_size));
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for (std::size_t i = 0; i < block_size; ++i)
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{
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if (buffer1[i] != buffer2[i])
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{
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return false;
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}
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}
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remaining_bytes -= block_size;
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}
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if (remaining_bytes > 0)
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{
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file1.read(&buffer1[0],static_cast<std::streamsize>(remaining_bytes));
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file2.read(&buffer2[0],static_cast<std::streamsize>(remaining_bytes));
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for (std::size_t i = 0; i < remaining_bytes; ++i)
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{
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if (buffer1[i] != buffer2[i])
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{
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return false;
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}
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}
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remaining_bytes = 0;
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}
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file1.close();
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file2.close();
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return true;
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}
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inline std::size_t file_crc(crc32& crc_module, const std::string& file_name)
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{
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std::ifstream file(file_name.c_str(),std::ios::binary);
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if (!file) return 0;
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const std::size_t block_size = 1024;
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char buffer[block_size];
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std::size_t remaining_bytes = file_size(file_name);
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crc_module.reset();
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while (remaining_bytes >= block_size)
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{
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file.read(&buffer[0],static_cast<std::streamsize>(block_size));
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crc_module.update(buffer,block_size);
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remaining_bytes -= block_size;
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}
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if (remaining_bytes > 0)
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{
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file.read(&buffer[0],static_cast<std::streamsize>(remaining_bytes));
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crc_module.update(buffer,remaining_bytes);
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remaining_bytes = 0;
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}
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return crc_module.crc();
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}
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} // namespace fileio
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} // namespace schifra
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#endif
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