103 lines
2.4 KiB
C
103 lines
2.4 KiB
C
/*
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* debug.c - Debugging utilities
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*
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* nspluginwrapper (C) 2005-2006 Gwenole Beauchesne
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include "sysdeps.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <limits.h>
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#include <errno.h>
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#include "debug.h"
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static int g_debug_level = -1;
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void npw_dprintf(const char *format, ...)
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{
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if (g_debug_level < 0) {
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g_debug_level = 0;
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const char *debug_str = getenv("NPW_DEBUG");
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if (debug_str) {
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errno = 0;
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long v = strtol(debug_str, NULL, 10);
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if ((v != LONG_MIN && v != LONG_MAX) || errno != ERANGE)
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g_debug_level = v;
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}
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}
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if (g_debug_level > 0) {
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va_list args;
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va_start(args, format);
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npw_vprintf(format, args);
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va_end(args);
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}
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}
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static FILE *g_log_file = NULL;
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static FILE *npw_log_file(void)
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{
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if (g_log_file == NULL) {
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const char *log_file = getenv("NPW_LOG");
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if (log_file) {
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const char *mode = "w";
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#ifdef BUILD_VIEWER
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/* the wrapper plugin has the responsability to create the file,
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thus the viewer is only opening it for appending data. */
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mode = "a";
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#endif
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g_log_file = fopen(log_file, mode);
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}
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if (log_file == NULL)
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g_log_file = stderr;
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}
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if (g_log_file != stderr)
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fseek(g_log_file, 0, SEEK_END);
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return g_log_file;
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}
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static void __attribute__((destructor)) log_file_sentinel(void)
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{
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if (g_log_file && g_log_file != stderr) {
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fclose(g_log_file);
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g_log_file = stderr;
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}
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}
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void npw_vprintf(const char *format, va_list args)
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{
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FILE *log_file = npw_log_file();
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fprintf(log_file, "*** NSPlugin %s *** ", NPW_COMPONENT_NAME);
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vfprintf(log_file, format, args);
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fflush(log_file);
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}
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void npw_printf(const char *format, ...)
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{
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va_list args;
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va_start(args, format);
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npw_vprintf(format, args);
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va_end(args);
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}
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