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/* $OpenBSD: debug.c,v 1.4 2015/10/02 09:48:22 ratchov 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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return NULL; |
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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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return NULL; |
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*num = val; |
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return p; |
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} |