mirror of https://gitlab.freedesktop.org/mesa/mesa
74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
/* Copyright © 2023 Valve Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice (including the next
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* paragraph) shall be included in all copies or substantial portions of the
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* Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
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* DEALINGS IN THE SOFTWARE.
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*/
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#ifndef UTIL_HEX_H
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#define UTIL_HEX_H
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#ifdef __cplusplus
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extern "C" {
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#endif
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/*
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* Convert a binary buffer of length `len` to a hexadecimal string of length
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* `len * 2 + 1` (including NUL terminator).
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*/
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static inline char *mesa_bytes_to_hex(char *buf, const unsigned char *binary,
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unsigned len) {
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static const char hex_digits[] = "0123456789abcdef";
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unsigned i;
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for (i = 0; i < len * 2; i += 2) {
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buf[i] = hex_digits[binary[i >> 1] >> 4];
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buf[i + 1] = hex_digits[binary[i >> 1] & 0x0f];
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}
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buf[i] = '\0';
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return buf;
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}
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static inline int _mesa_hex_to_int(unsigned char c)
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{
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return c - (c >= 'a' ? 'a' - 10 : '0');
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}
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/*
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* Read `len` pairs of hexadecimal digits from `hex` and write the values to
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* `binary` as `len` bytes.
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* Hexadecimals must be lower case.
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*/
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static inline void mesa_hex_to_bytes(unsigned char *buf, const char *hex,
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unsigned len)
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{
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for (unsigned i = 0; i < len; i++) {
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int hi = _mesa_hex_to_int(hex[i * 2]);
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int lo = _mesa_hex_to_int(hex[i * 2 + 1]);
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buf[i] = (hi << 4) | lo;
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}
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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