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GeezerVison is showing github.com — ByteConvert_cpp/ByteConvert/ByteConvert.cpp at master · SloCompTech/ByteConvert_cpp

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ByteConvert.cpp

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/**
* @file ByteConvert.cpp
*
* @authors Martin Dagarin
* @date 22/07/2018
*
* @brief Source file of ByteConvert module
*/
#include "ByteConvert.hpp"
namespace ByteConvert
{
std::string byte_to_hex(const uint8_t& byte)
{
std::string buffer("");
uint8_t val;
for (uint8_t i = 0; i < 2; i++) {
if (i == 0)
val = (byte >> 4);
else
val = byte & 0x0f;
if (val >= 16)
buffer += '?';
else if (val < 10)
buffer += ('0' + val);
else
buffer += ('W' + val);
}
return buffer;
}
uint8_t hex_to_byte(const std::string& hex)
{
uint8_t val = 0x00;
uint8_t pos = (hex.size() > 1) ? hex.size() - 2 : hex.size() - 1;
char c;
for (; pos < hex.size(); pos++) {
c = hex[pos];
if (c >= 'A' && c <= 'F')
val += (c - '7');
else if (c >= 'a' && c <= 'f')
val += (c - 'W');
else if (c >= '0' && c <= '9')
val += (c - '0');
else
val += '?';
if (pos == 0 && hex.size() > 1)
val = (val << 4);
}
return val;
}
std::string block_to_hex_string(const uint8_t* const block, const size_t& size)
{
std::string buffer("");
for (size_t i = 0; i < size; i++) {
buffer += byte_to_hex(block[i]);
}
return buffer;
}
uint8_t* hex_string_to_block(const std::string& hex_string, size_t* const size)
{
size_t block_size = hex_string.size()/2 + ((hex_string.size() % 2 == 1) ? 1 : 0);
uint8_t* block = new uint8_t[block_size];
int offset = 0;
for (size_t i = 0;i < block_size; i++) {
if (i == 0 && hex_string.size() % 2 == 1) {
offset = -1;
block[i] = hex_to_byte(std::string("0") + hex_string[0]);
continue;
}
block[i] = hex_to_byte(std::string(1,hex_string[i*2 + offset]) + hex_string[i*2 + 1 + offset]);
}
if (size != nullptr)
*size = block_size;
return block;
}
}
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