1 /**************************************************************************
2 * fg_debug.c -- Flight Gear debug utility functions
4 * Written by Paul Bleisch, started January 1998.
6 * Copyright (C) 1998 Paul Bleisch, pbleisch@acm.org
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of the
11 * License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 * (Log is kept at end of this file)
23 **************************************************************************/
26 #include <Main/fg_debug.h>
31 static int fg_DebugSem = 1;
32 static fgDebugClass fg_DebugClass = FG_ALL;
33 static fgDebugPriority fg_DebugPriority = FG_INFO;
34 static fgDebugCallback fg_DebugCallback = NULL;
37 static FILE *fg_DebugOutput = stderr;
38 #else /* __CYGWIN32__ */
39 static FILE *fg_DebugOutput = NULL;
40 #endif /* __CYGWIN32 */
42 /* TODO: Actually make this thing thread safe */
44 #define FG_GRABDEBUGSEM while( --fg_DebugSem < 0 ) { fg_DebugSem++; }
45 #define FG_RELEASEDEBUGSEM fg_DebugSem++;
47 #define FG_GRABDEBUGSEM
48 #define FG_RELEASEDEBUGSEM
51 /* Used for convienence initialization from env variables.
55 fgDebugClass dbg_class;
56 } fg_DebugClasses[] = {
57 { "FG_NONE", 0x00000000 },
58 { "FG_TERRAIN", 0x00000001 },
59 { "FG_ASTRO", 0x00000002 },
60 { "FG_FLIGHT", 0x00000004 },
61 { "FG_INPUT", 0x00000008 },
62 { "FG_GL", 0x00000010 },
63 { "FG_VIEW", 0x00000020 },
64 { "FG_COCKPIT", 0x00000040 },
65 { "FG_GENERAL", 0x00000080 },
66 { "FG_MATH", 0x00000100 },
67 { "FG_EVENT", 0x00000200 },
69 /* Do not edit below here, last entry should be null */
70 { "FG_ALL", 0xFFFFFFFF },
73 static fgDebugClass fgDebugStrToClass( char *str );
76 /* fgInitDebug =============================================================*/
77 void fgInitDebug( void )
79 char *pszClass, *pszPrio;
82 fg_DebugOutput = stderr;
83 #endif /* __CYGWIN32 */
86 fg_DebugSem=fg_DebugSem; /* shut up GCC */
88 pszPrio = getenv( "FG_DEBUGPRIORITY" );
90 fg_DebugPriority = atoi( pszPrio );
91 fprintf( stderr, "fg_debug.c: Environment overrides default debug priority (%d)\n",
95 pszClass = getenv( "FG_DEBUGCLASS" );
97 fg_DebugClass = fgDebugStrToClass( pszClass );
98 fprintf( stderr, "fg_debug.c: Environment overrides default debug class (0x%08X)\n",
105 /* fgDebugStrToClass ======================================================*/
106 fgDebugClass fgDebugStrToClass( char *str )
108 char *hex = "0123456789ABCDEF";
109 char *hexl = "0123456789abcdef";
110 char *pt, *p, *ph, ps=1;
111 unsigned int val = 0, i;
117 /* Check for 0xXXXXXX notation */
118 if( (p = strstr( str, "0x")) ) {
121 if( (ph = strchr(hex,*p)) || (ph = strchr(hexl,*p)) ){
127 /* fprintf( stderr, "Error in hex string '%s'\n", str );
134 /* Must be in string format */
138 while( *p && (*p==' ' || *p=='\t') ) p++; /* remove whitespace */
139 pt = p; /* mark token */
140 while( *p && (*p!='|') ) p++; /* find OR or EOS */
141 ps = *p; /* save value at p so we can attempt to be bounds safe */
142 *p++ = 0; /* terminate token */
143 /* determine value for token */
145 while( fg_DebugClasses[i].str &&
146 strncmp( fg_DebugClasses[i].str, pt, strlen(fg_DebugClasses[i].str)) ) i++;
147 if( fg_DebugClasses[i].str == NULL ) {
148 fprintf( stderr, "fg_debug.c: Could not find message class '%s'\n", pt );
150 val |= fg_DebugClasses[i].dbg_class;
154 return (fgDebugClass)val;
158 /* fgSetDebugOutput =======================================================*/
159 void fgSetDebugOutput( FILE *out )
162 fflush( fg_DebugOutput );
163 fg_DebugOutput = out;
168 /* fgSetDebugLevels =======================================================*/
169 void fgSetDebugLevels( fgDebugClass dbg_class, fgDebugPriority prio )
172 fg_DebugClass = dbg_class;
173 fg_DebugPriority = prio;
178 /* fgRegisterDebugCallback ================================================*/
179 fgDebugCallback fgRegisterDebugCallback( fgDebugCallback callback )
183 old = fg_DebugCallback;
184 fg_DebugCallback = callback;
190 /* fgPrintf ===============================================================*/
191 int fgPrintf( fgDebugClass dbg_class, fgDebugPriority prio, char *fmt, ... )
199 if( !(dbg_class & fg_DebugClass) || (prio < fg_DebugPriority) ) {
204 /* ret = vsprintf( szOut, fmt, (&fmt+1)); (but it didn't work, thus ... */
206 ret = vsprintf( szOut, fmt, ap);
209 if( fg_DebugCallback!=NULL && fg_DebugCallback(dbg_class, prio, szOut) ) {
214 fprintf( fg_DebugOutput, szOut );
216 if( prio == FG_EXIT ) {
219 else if( prio == FG_ABORT ) {