37 lines
2.3 KiB
C
37 lines
2.3 KiB
C
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ This program is free software; you can redistribute it and/or modify │
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│ it under the terms of the GNU General Public License as published by │
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│ the Free Software Foundation; version 2 of the License. │
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│ │
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│ This program is distributed in the hope that it will be useful, but │
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│ WITHOUT ANY WARRANTY; without even the implied warranty of │
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│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
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│ General Public License for more details. │
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│ │
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│ You should have received a copy of the GNU General Public License │
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│ along with this program; if not, write to the Free Software │
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│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
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│ 02110-1301 USA │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/assert.h"
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#include "libc/fmt/bing.h"
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#include "libc/str/str.h"
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void *unhexbuf(void *buf, size_t size, const char *hexdigs) {
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size_t i;
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unsigned char *p;
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assert(size * 2 == strlen(hexdigs));
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p = buf;
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for (i = 0; i < size; ++i) {
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assert(isxdigit(hexdigs[i / 2 + 0]) && isxdigit(hexdigs[i / 2 + 1]));
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}
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for (i = 0; i < size; ++i) {
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p[i] = hextoint(hexdigs[i * 2 + 0]) * 16 + hextoint(hexdigs[i * 2 + 1]);
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}
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return buf;
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}
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