1 /***************************************************************************/
5 /* Debugging and logging component (body). */
7 /* Copyright 1996-2001 by */
8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
10 /* This file is part of the FreeType project, and may only be used, */
11 /* modified, and distributed under the terms of the FreeType project */
12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
13 /* this file you indicate that you have read the license and */
14 /* understand and accept it fully. */
16 /***************************************************************************/
19 /*************************************************************************/
21 /* This component contains various macros and functions used to ease the */
22 /* debugging of the FreeType engine. Its main purpose is in assertion */
23 /* checking, tracing, and error detection. */
25 /* There are now three debugging modes: */
29 /* Error and trace messages are sent to the log file (which can be the */
30 /* standard error output). */
34 /* Only error messages are generated. */
38 /* No error message is sent or generated. The code is free from any */
39 /* debugging parts. */
41 /*************************************************************************/
45 #include FT_FREETYPE_H
46 #include FT_INTERNAL_DEBUG_H
49 #if defined( FT_DEBUG_LEVEL_ERROR )
52 FT_Message( const char* fmt, ... )
64 FT_Panic( const char* fmt, ... )
76 #endif /* FT_DEBUG_LEVEL_ERROR */
80 #ifdef FT_DEBUG_LEVEL_TRACE
82 /* array of trace levels, initialized to 0 */
83 int ft_trace_levels[trace_count];
85 /* define array of trace toggle names */
86 #define FT_TRACE_DEF(x) #x ,
88 static const char* ft_trace_toggles[trace_count + 1] =
90 #include FT_INTERNAL_TRACE_H
97 /*************************************************************************/
99 /* Initialize the tracing sub-system. This is done by retrieving the */
100 /* value of the "FT2_DEBUG" environment variable. It must be a list of */
101 /* toggles, separated by spaces, `;' or `,'. Example: */
103 /* "any:3 memory:6 stream:5" */
105 /* This will request that all levels be set to 3, except the trace level */
106 /* for the memory and stream components which are set to 6 and 5, */
109 /* See the file <freetype/internal/fttrace.h> for details of the */
110 /* available toggle names. */
112 /* The level must be between 0 and 6; 0 means quiet (except for serious */
113 /* runtime errors), and 6 means _very_ verbose. */
116 ft_debug_init( void )
118 const char* ft2_debug = getenv( "FT2_DEBUG" );
122 const char* p = ft2_debug;
128 /* skip leading whitespace and separators */
129 if ( *p == ' ' || *p == '\t' || *p == ',' || *p == ';' || *p == '=' )
132 /* read toggle name, followed by ':' */
134 while ( *p && *p != ':' )
137 if ( *p == ':' && p > q )
139 FT_Int n, i, len = (FT_Int)(p - q);
140 FT_Int level = -1, found = -1;
143 for ( n = 0; n < trace_count; n++ )
145 const char* toggle = ft_trace_toggles[n];
148 for ( i = 0; i < len; i++ )
150 if ( toggle[i] != q[i] )
154 if ( i == len && toggle[i] == 0 )
166 if ( level < 0 || level > 6 )
170 if ( found >= 0 && level >= 0 )
172 if ( found == trace_any )
174 /* special case for "any" */
175 for ( n = 0; n < trace_count; n++ )
176 ft_trace_levels[n] = level;
179 ft_trace_levels[found] = level;
186 #else /* !FT_DEBUG_LEVEL_TRACE */
189 ft_debug_init( void )
194 #endif /* !FT_DEBUG_LEVEL_TRACE */