Method hex_encode

lib_acl_cpp/src/stdlib/md5.cpp:337–356

#define UCHAR_PTR(x) ((const unsigned char *)(x))

const char* md5::hex_encode(const void* in, size_t len, char* out, size_t size)
{
	// size ��������Ӧ��Ϊ: len * 2 + 1
	if (size < 2 * len + 1) {
		abort();
	}

	const unsigned char *cp;
	int     ch;
	size_t  count, i = 0;

	for (cp = UCHAR_PTR(in), count = len; count > 0; count--, cp++) {
		ch = *cp;
		out[i++] = hex_chars[(ch >> 4) & 0xf];
		out[i++] = hex_chars[ch & 0xf];
	}

	out[i] = 0;
	return out;
}

} // namespace acl