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add methods for converting from hex string to bytes

add to convert/text.h:
template<typename HexStringPointerType, typename BytesStringType>
bool hex_string_pointer_to_bytes(const HexStringPointerType * hex_string, BytesStringType & bytes, bool clear_bytes = true);

template<typename HexStringType, typename BytesStringType>
bool hex_string_to_bytes(const HexStringType & hex_string, BytesStringType & bytes, bool clear_bytes = true);
master
Tomasz Sowa 4 months ago
parent
commit
d13c10c604
  1. 45
      src/convert/text.h

45
src/convert/text.h

@ -5,7 +5,7 @@
*/
/*
* Copyright (c) 2017-2021, Tomasz Sowa
* Copyright (c) 2017-2022, Tomasz Sowa
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
@ -44,6 +44,49 @@ namespace pt
bool is_white(wchar_t c, bool check_additional_chars = true, bool treat_new_line_as_white = true);
bool is_digit(wchar_t c, int base = 10, int * digit = 0);
// IMPROVEME add tests
template<typename HexStringPointerType, typename BytesStringType>
bool hex_string_pointer_to_bytes(const HexStringPointerType * hex_string, BytesStringType & bytes, bool clear_bytes = true)
{
bool converted_correctly = true;
size_t i = 0;
if( clear_bytes )
bytes.clear();
for( ; converted_correctly && hex_string[i] != 0 && hex_string[i+1] != 0 ; i += 2)
{
int c1, c2;
converted_correctly = converted_correctly && is_digit(hex_string[i], 16, &c1);
converted_correctly = converted_correctly && is_digit(hex_string[i+1], 16, &c2);
if( converted_correctly )
{
bytes += (char)(unsigned char)(((c1 << 4) | c2));
}
}
if( hex_string[i] != 0 )
{
// one digit has left
converted_correctly = false;
}
return converted_correctly;
}
// IMPROVEME add tests
template<typename HexStringType, typename BytesStringType>
bool hex_string_to_bytes(const HexStringType & hex_string, BytesStringType & bytes, bool clear_bytes = true)
{
return hex_string_pointer_to_bytes(hex_string.c_str(), bytes, clear_bytes);
}
const char * skip_white(const char * str, bool check_additional_chars = true, bool treat_new_line_as_white = true);
const wchar_t * skip_white(const wchar_t * str, bool check_additional_chars = true, bool treat_new_line_as_white = true);

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