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Leah Rowe
f4f1670909
i had a bunch of hacks in here because i was previously using very buggy rand. now it's ok. Signed-off-by: Leah Rowe <leah@libreboot.org>
59 lines
1.1 KiB
C
59 lines
1.1 KiB
C
/* SPDX-License-Identifier: MIT
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* Copyright (c) 2026 Leah Rowe <leah@libreboot.org>
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*
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* Non-randomisation-related numerical functions.
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* For rand functions, see: rand.c
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*/
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#ifdef __OpenBSD__
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#include <sys/param.h>
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#endif
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#include <sys/types.h>
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#include <errno.h>
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#if !((defined(__OpenBSD__) && (OpenBSD) >= 201) || \
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defined(__FreeBSD__) || \
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defined(__NetBSD__) || defined(__APPLE__))
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#include <fcntl.h> /* if not arc4random: /dev/urandom */
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#endif
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#include <limits.h>
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#include <stddef.h>
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#include <string.h>
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#include <unistd.h>
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#include "../include/common.h"
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unsigned short
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hextonum(char ch_s)
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{
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int saved_errno = errno;
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unsigned char ch;
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size_t rval;
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ch = (unsigned char)ch_s;
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if ((unsigned int)(ch - '0') <= 9)
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return ch - '0';
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ch |= 0x20;
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if ((unsigned int)(ch - 'a') <= 5)
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return ch - 'a' + 10;
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if (ch == '?' || ch == 'x') {
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rset(&rval, sizeof(rval));
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return rval & 0xf;
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}
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return 16;
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}
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void
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check_bin(size_t a, const char *a_name)
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{
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if (a > 1)
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err_no_cleanup(0, EINVAL, "%s must be 0 or 1, but is %lu",
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a_name, (size_t)a);
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}
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