netsurf/utils/log.c

126 lines
3.1 KiB
C

/*
* Copyright 2007 Rob Kendrick <rjek@netsurf-browser.org>
* Copyright 2004-2007 James Bursa <bursa@users.sourceforge.net>
* Copyright 2003 Phil Mellor <monkeyson@users.sourceforge.net>
* Copyright 2003 John M Bell <jmb202@ecs.soton.ac.uk>
* Copyright 2004 John Tytgat <joty@netsurf-browser.org>
*
* This file is part of NetSurf, http://www.netsurf-browser.org/
*
* NetSurf is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; version 2 of the License.
*
* NetSurf is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include <stdarg.h>
#include <stdio.h>
#include <sys/time.h>
#include "utils/log.h"
bool verbose_log = false;
nserror nslog_init(nslog_ensure_t *ensure, int *pargc, char **argv)
{
nserror ret = NSERROR_OK;
if (((*pargc) > 1) &&
(argv[1][0] == '-') &&
(argv[1][1] == 'v') &&
(argv[1][2] == 0)) {
int argcmv;
for (argcmv = 2; argcmv < (*pargc); argcmv++) {
argv[argcmv - 1] = argv[argcmv];
}
(*pargc)--;
/* ensure we actually show logging */
verbose_log = true;
}
/* ensure output file handle is correctly configured */
if ((verbose_log == true) &&
(ensure != NULL) &&
(ensure(stderr) == false)) {
/* failed to ensure output configuration */
ret = NSERROR_INIT_FAILED;
verbose_log = false;
}
return ret;
}
#ifndef NDEBUG
/* Subtract the `struct timeval' values X and Y,
storing the result in RESULT.
Return 1 if the difference is negative, otherwise 0.
*/
static int
timeval_subtract(struct timeval *result, struct timeval *x, struct timeval *y)
{
/* Perform the carry for the later subtraction by updating y. */
if (x->tv_usec < y->tv_usec) {
int nsec = (int)(y->tv_usec - x->tv_usec) / 1000000 + 1;
y->tv_usec -= 1000000 * nsec;
y->tv_sec += nsec;
}
if ((int)(x->tv_usec - y->tv_usec) > 1000000) {
int nsec = (int)(x->tv_usec - y->tv_usec) / 1000000;
y->tv_usec += 1000000 * nsec;
y->tv_sec -= nsec;
}
/* Compute the time remaining to wait.
tv_usec is certainly positive. */
result->tv_sec = x->tv_sec - y->tv_sec;
result->tv_usec = x->tv_usec - y->tv_usec;
/* Return 1 if result is negative. */
return x->tv_sec < y->tv_sec;
}
const char *nslog_gettime(void)
{
static struct timeval start_tv;
static char buff[32];
struct timeval tv;
struct timeval now_tv;
if (!timerisset(&start_tv)) {
gettimeofday(&start_tv, NULL);
}
gettimeofday(&now_tv, NULL);
timeval_subtract(&tv, &now_tv, &start_tv);
snprintf(buff, sizeof(buff),"(%ld.%06ld)",
(long)tv.tv_sec, (long)tv.tv_usec);
return buff;
}
void nslog_log(const char *format, ...)
{
va_list ap;
va_start(ap, format);
vfprintf(stderr, format, ap);
va_end(ap);
}
#endif