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/* Copyright © 2023 Valve Corporation
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice (including the next
* paragraph) shall be included in all copies or substantial portions of the
* Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
*/
#ifndef UTIL_HEX_H
#define UTIL_HEX_H
#include <stdlib.h>
#ifdef __cplusplus
extern "C" {
#endif
/*
* Convert a binary buffer of length `len` to a hexadecimal string of length
* `len * 2 + 1` (including NUL terminator).
*/
static inline char *mesa_bytes_to_hex(char *buf, const unsigned char *binary,
unsigned len) {
static const char hex_digits[] = "0123456789abcdef";
unsigned i;
for (i = 0; i < len * 2; i += 2) {
buf[i] = hex_digits[binary[i >> 1] >> 4];
buf[i + 1] = hex_digits[binary[i >> 1] & 0x0f];
}
buf[i] = '\0';
return buf;
}
/*
* Read `len` pairs of hexadecimal digits from `hex` and write the values to
* `binary` as `len` bytes.
*/
static inline void mesa_hex_to_bytes(unsigned char *buf, const char *hex,
unsigned len) {
for (unsigned i = 0; i < len; i++) {
char tmp[3];
tmp[0] = hex[i * 2];
tmp[1] = hex[(i * 2) + 1];
tmp[2] = '\0';
buf[i] = strtol(tmp, NULL, 16);
}
}
#ifdef __cplusplus
}
#endif
#endif
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