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Properly counting group name lengths and fixed a crash on server create when the group creation process failed

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WolverinDEV 2021-04-28 18:31:59 +02:00
parent bc8f314623
commit 6ad9f7d3f0
1 changed files with 53 additions and 0 deletions
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53
src/misc/utf8.h Normal file
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#pragma once
#include <cstddef>
#include <string_view>
namespace utf8 {
[[nodiscard]] inline ssize_t count_characters(const std::string_view& message) {
ssize_t index{0};
ssize_t count{0};
while(index < message.length()){
count++;
auto current = (uint8_t) message[index];
if(current >= 128) { //UTF8 check
if(current >= 192 && (current <= 193 || current >= 245)) {
return -1;
} else if(current >= 194 && current <= 223) {
if(message.length() - index <= 1) {
return -1;
} else if((uint8_t) message[index + 1] >= 128 && (uint8_t) message[index + 1] <= 191) {
index += 1; //Valid
} else {
return -1;
}
} else if(current >= 224 && current <= 239) {
if(message.length() - index <= 2) {
return -1;
} else if((uint8_t) message[index + 1] >= 128 && (uint8_t) message[index + 1] <= 191 &&
(uint8_t) message[index + 2] >= 128 && (uint8_t) message[index + 2] <= 191) {
index += 2; //Valid
} else {
return -1;
}
} else if(current >= 240 && current <= 244) {
if(message.length() - index <= 3) {
return -1;
} else if((uint8_t) message[index + 1] >= 128 && (uint8_t) message[index + 1] <= 191 &&
(uint8_t) message[index + 2] >= 128 && (uint8_t) message[index + 2] <= 191 &&
(uint8_t) message[index + 3] >= 128 && (uint8_t) message[index + 3] <= 191) {
index += 3; //Valid
} else {
return -1;
}
} else {
return -1;
}
}
index++;
}
return count;
}
}