Function UTIL_DecodeHexString

tools/gdc-psyfork/gdc.cpp:733–764

}

size_t UTIL_DecodeHexString(unsigned char *buffer, size_t maxlength, const char *hexstr)
{
	size_t written = 0;
	size_t length = strlen(hexstr);

	for (size_t i = 0; i < length; i++)
	{
		if (written >= maxlength)
			break;
		
		buffer[written++] = hexstr[i];
		if (hexstr[i] == '\\' && hexstr[i + 1] == 'x')
		{
			if (i + 3 >= length)
				continue;
			/* Get the hex part. */
			char s_byte[3];
			int r_byte;
			s_byte[0] = hexstr[i + 2];
			s_byte[1] = hexstr[i + 3];
			s_byte[2] = '\0';
			/* Read it as an integer */
			sscanf(s_byte, "%x", &r_byte);
			/* Save the value */
			buffer[written - 1] = r_byte;
			/* Adjust index */
			i += 3;
		}
	}

	return written;
}