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.
23 * (Log is kept at end of this file)
24 **************************************************************************/
31 #include <Include/cmdargs.h> // Line to command line arguments
32 #include <Main/fg_debug.h>
34 static int fg_DebugSem = 1;
35 fgDebugClass fg_DebugClass = FG_ALL; // Need visibility for
36 fgDebugPriority fg_DebugPriority = FG_INFO; // command line processing.
37 static fgDebugCallback fg_DebugCallback = NULL;
39 FILE *fg_DebugOutput = NULL; // Visibility needed for command line processor.
40 // This can be set to a FILE from the command
41 // line. If not, it will be set to stderr.
43 /* TODO: Actually make this thing thread safe */
45 #define FG_GRABDEBUGSEM while( --fg_DebugSem < 0 ) { fg_DebugSem++; }
46 #define FG_RELEASEDEBUGSEM fg_DebugSem++;
48 #define FG_GRABDEBUGSEM
49 #define FG_RELEASEDEBUGSEM
52 /* Used for convienence initialization from env variables.
56 fgDebugClass dbg_class;
57 } fg_DebugClasses[] = {
58 { "FG_NONE", 0x00000000 },
59 { "FG_TERRAIN", 0x00000001 },
60 { "FG_ASTRO", 0x00000002 },
61 { "FG_FLIGHT", 0x00000004 },
62 { "FG_INPUT", 0x00000008 },
63 { "FG_GL", 0x00000010 },
64 { "FG_VIEW", 0x00000020 },
65 { "FG_COCKPIT", 0x00000040 },
66 { "FG_GENERAL", 0x00000080 },
67 { "FG_MATH", 0x00000100 },
68 { "FG_EVENT", 0x00000200 },
69 { "FG_AIRCRAFT",0x00000400 },
71 /* Do not edit below here, last entry should be null */
72 { "FG_ALL", 0xFFFFFFFF },
75 static fgDebugClass fgDebugStrToClass( char *str );
78 /* fgInitDebug =============================================================*/
79 void fgInitDebug( void )
81 char *pszClass, *pszPrio, *pszFile;
83 // Support for log file/alt debug output via command line, environment or
84 // reasonable default.
86 if( strlen( logArgbuf ) > 3) { // First check for command line option
87 fg_DebugOutput = fopen(logArgbuf, "a+" ); // Assumed that we will append.
90 if( !fg_DebugOutput ) { // If not set on command line, environment?
91 pszFile = getenv( "FG_DEBUGFILE" );
92 if( pszFile ) { // There is such an environmental variable.
93 fg_DebugOutput = fopen( pszFile, "a+" );
97 if( !fg_DebugOutput ) { // If neither command line nor environment
98 fg_DebugOutput = stderr; // then we use the fallback position
102 fg_DebugSem = fg_DebugSem; /* shut up GCC */
104 // Test command line option overridge of debug priority. If the value
105 // is in range (properly optioned) the we will override both defaults
106 // and the environmental value.
108 if ((priorityArgValue >= FG_BULK) && (priorityArgValue <= FG_ABORT)) {
109 fg_DebugPriority = priorityArgValue;
111 else { // Either not set or out of range. We will not warn the user.
112 pszPrio = getenv( "FG_DEBUGPRIORITY" );
114 fg_DebugPriority = atoi( pszPrio );
116 "fg_debug.c: Environment overrides default debug priority (%d)\n",
122 if ((debugArgValue >= FG_ALL) && (debugArgValue < FG_UNDEFD)) {
123 fg_DebugPriority = priorityArgValue;
125 else { // Either not set or out of range. We will not warn the user.
126 pszClass = getenv( "FG_DEBUGCLASS" );
128 fg_DebugClass = fgDebugStrToClass( pszClass );
130 "fg_debug.c: Environment overrides default debug class (0x%08X)\n",
138 /* fgDebugStrToClass ======================================================*/
139 fgDebugClass fgDebugStrToClass( char *str )
141 char *hex = "0123456789ABCDEF";
142 char *hexl = "0123456789abcdef";
143 char *pt, *p, *ph, ps = 1;
144 unsigned int val = 0, i;
150 /* Check for 0xXXXXXX notation */
151 if( (p = strstr( str, "0x")) ) {
154 if( (ph = strchr(hex,*p)) || (ph = strchr(hexl,*p)) ){
160 /* fprintf( stderr, "Error in hex string '%s'\n", str );
167 /* Must be in string format */
171 while( *p && (*p==' ' || *p=='\t') ) p++; /* remove whitespace */
172 pt = p; /* mark token */
173 while( *p && (*p!='|') ) p++; /* find OR or EOS */
174 ps = *p; /* save value at p so we can attempt to be bounds safe */
175 *p++ = 0; /* terminate token */
176 /* determine value for token */
178 while( fg_DebugClasses[i].str &&
179 strncmp( fg_DebugClasses[i].str, pt, strlen(fg_DebugClasses[i].str)) ) i++;
180 if( fg_DebugClasses[i].str == NULL ) {
181 fprintf( stderr, "fg_debug.c: Could not find message class '%s'\n", pt );
183 val |= fg_DebugClasses[i].dbg_class;
187 return (fgDebugClass)val;
191 /* fgSetDebugOutput =======================================================*/
192 void fgSetDebugOutput( FILE *out )
195 fflush( fg_DebugOutput );
196 fg_DebugOutput = out;
201 /* fgSetDebugLevels =======================================================*/
202 void fgSetDebugLevels( fgDebugClass dbg_class, fgDebugPriority prio )
205 fg_DebugClass = dbg_class;
206 fg_DebugPriority = prio;
211 /* fgRegisterDebugCallback ================================================*/
212 fgDebugCallback fgRegisterDebugCallback( fgDebugCallback callback )
216 old = fg_DebugCallback;
217 fg_DebugCallback = callback;
223 /* fgPrintf ===============================================================*/
224 int fgPrintf( fgDebugClass dbg_class, fgDebugPriority prio, char *fmt, ... )
230 // If no action to take, then don't bother with the semaphore activity
231 // Slight speed benefit.
233 if( !(dbg_class & fg_DebugClass) || (prio < fg_DebugPriority) ) {
234 return ret; // Its zero anyway. But we might think about changing
235 // it upon some error condition?
240 /* ret = vsprintf( szOut, fmt, (&fmt+1)); (but it didn't work, thus ... */
242 ret = vsprintf( szOut, fmt, ap);
245 if( fg_DebugCallback!=NULL && fg_DebugCallback(dbg_class, prio, szOut) ) {
250 fprintf( fg_DebugOutput, szOut );
252 if( prio == FG_EXIT ) {
255 else if( prio == FG_ABORT ) {
264 /* Revision 1.7 1998/02/16 13:39:43 curt
265 /* Miscellaneous weekend tweaks. Fixed? a cache problem that caused whole
266 /* tiles to occasionally be missing.