Aegisub/subprojects/csri/subhelp/logging.c

103 lines
2.7 KiB
C

/*****************************************************************************
* asa: portable digital subtitle renderer
*****************************************************************************
* Copyright (C) 2007 David Lamparter
*
* This program 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; either version 2 of the License, or
* (at your option) any later version.
*
* This program 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, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
****************************************************************************/
#ifdef HAVE_CONFIG_H
#include "acconf.h"
#endif
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include "visibility.h"
#include "subhelp.h"
#include <csri/logging.h>
static void *appdata = NULL;
static csri_logging_func *logfunc = NULL;
void setlogcallback(csri_logging_func *_logfunc, void *_appdata) hidden;
void setlogcallback(csri_logging_func *_logfunc, void *_appdata)
{
logfunc = _logfunc;
appdata = _appdata;
}
static struct csri_logging_ext logext = {
setlogcallback
};
void subhelp_logging_pass(struct csri_logging_ext *nlogext)
{
if (!nlogext || !nlogext->set_logcallback)
return;
nlogext->set_logcallback(logfunc, appdata);
}
void *subhelp_query_ext_logging(csri_ext_id extname)
{
if (strcmp(extname, CSRI_EXT_LOGGING))
return NULL;
return &logext;
}
void subhelp_log(enum csri_logging_severity severity, const char *msg, ...)
{
va_list args;
va_start(args, msg);
subhelp_vlog(severity, msg, args);
va_end(args);
}
void subhelp_vlog(enum csri_logging_severity severity,
const char *msg, va_list args)
{
char *buffer;
const char *final;
size_t size = 256;
int n;
buffer = (char *)malloc(256);
while (buffer) {
n = vsnprintf(buffer, size, msg, args);
if (n >= 0 && (unsigned)n < size)
break;
size = n > 0 ? (unsigned)n + 1 : size * 2;
buffer = (char *)realloc(buffer, size);
}
final = buffer ? buffer : "<out of memory in logging function>";
subhelp_slog(severity, final);
if (buffer)
free(buffer);
}
void subhelp_slog(enum csri_logging_severity severity, const char *msg)
{
if (logfunc)
logfunc(appdata, severity, msg);
else {
fprintf(stderr, msg);
fprintf(stderr, "\n");
}
}