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