84 lines
1.9 KiB
C
84 lines
1.9 KiB
C
/* $OpenBSD: debug.c,v 1.5 2018/09/26 08:33:22 miko Exp $ */
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/*
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* Copyright (c) 2011 Alexandre Ratchov <alex@caoua.org>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "debug.h"
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#ifdef DEBUG
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/*
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* debug level, -1 means uninitialized
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*/
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int _sndio_debug = -1;
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void
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_sndio_debug_init(void)
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{
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char *dbg;
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if (_sndio_debug < 0) {
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dbg = issetugid() ? NULL : getenv("SNDIO_DEBUG");
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if (!dbg || sscanf(dbg, "%u", &_sndio_debug) != 1)
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_sndio_debug = 0;
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}
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}
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#endif
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const char *
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_sndio_parsetype(const char *str, char *type)
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{
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while (*type) {
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if (*type != *str)
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return NULL;
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type++;
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str++;
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}
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if (*str >= 'a' && *str <= 'z')
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return NULL;
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return str;
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}
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const char *
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_sndio_parsenum(const char *str, unsigned int *num, unsigned int max)
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{
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const char *p = str;
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unsigned int dig, maxq, maxr, val;
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val = 0;
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maxq = max / 10;
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maxr = max % 10;
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for (;;) {
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dig = *p - '0';
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if (dig >= 10)
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break;
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if (val > maxq || (val == maxq && dig > maxr)) {
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DPRINTF("%s: number too large\n", str);
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return NULL;
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}
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val = val * 10 + dig;
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p++;
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}
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if (p == str) {
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DPRINTF("%s: number expected\n", str);
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return NULL;
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}
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*num = val;
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return p;
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}
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