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- /***************************************************************************/
- /* */
- /* ftdebug.c */
- /* */
- /* Debugging and logging component (body). */
- /* */
- /* Copyright 1996-2001 by */
- /* David Turner, Robert Wilhelm, and Werner Lemberg. */
- /* */
- /* This file is part of the FreeType project, and may only be used, */
- /* modified, and distributed under the terms of the FreeType project */
- /* license, LICENSE.TXT. By continuing to use, modify, or distribute */
- /* this file you indicate that you have read the license and */
- /* understand and accept it fully. */
- /* */
- /***************************************************************************/
- /*************************************************************************/
- /* */
- /* This component contains various macros and functions used to ease the */
- /* debugging of the FreeType engine. Its main purpose is in assertion */
- /* checking, tracing, and error detection. */
- /* */
- /* There are now three debugging modes: */
- /* */
- /* - trace mode */
- /* */
- /* Error and trace messages are sent to the log file (which can be the */
- /* standard error output). */
- /* */
- /* - error mode */
- /* */
- /* Only error messages are generated. */
- /* */
- /* - release mode: */
- /* */
- /* No error message is sent or generated. The code is free from any */
- /* debugging parts. */
- /* */
- /*************************************************************************/
- #include <ft2build.h>
- #include FT_FREETYPE_H
- #include FT_INTERNAL_DEBUG_H
- #if defined( FT_DEBUG_LEVEL_ERROR )
- FT_EXPORT_DEF( void )
- FT_Message( const char* fmt, ... )
- {
- va_list ap;
- va_start( ap, fmt );
- vprintf( fmt, ap );
- va_end( ap );
- }
- FT_EXPORT_DEF( void )
- FT_Panic( const char* fmt, ... )
- {
- va_list ap;
- va_start( ap, fmt );
- vprintf( fmt, ap );
- va_end( ap );
- exit( EXIT_FAILURE );
- }
- #endif /* FT_DEBUG_LEVEL_ERROR */
- #ifdef FT_DEBUG_LEVEL_TRACE
- /* array of trace levels, initialized to 0 */
- int ft_trace_levels[trace_count];
- /* define array of trace toggle names */
- #define FT_TRACE_DEF(x) #x ,
- static const char* ft_trace_toggles[trace_count + 1] =
- {
- #include FT_INTERNAL_TRACE_H
- NULL
- };
- #undef FT_TRACE_DEF
- /*************************************************************************/
- /* */
- /* Initialize the tracing sub-system. This is done by retrieving the */
- /* value of the "FT2_DEBUG" environment variable. It must be a list of */
- /* toggles, separated by spaces, `;' or `,'. Example: */
- /* */
- /* "any:3 memory:6 stream:5" */
- /* */
- /* This will request that all levels be set to 3, except the trace level */
- /* for the memory and stream components which are set to 6 and 5, */
- /* respectively. */
- /* */
- /* See the file <freetype/internal/fttrace.h> for details of the */
- /* available toggle names. */
- /* */
- /* The level must be between 0 and 6; 0 means quiet (except for serious */
- /* runtime errors), and 6 means _very_ verbose. */
- /* */
- FT_BASE_DEF( void )
- ft_debug_init( void )
- {
- const char* ft2_debug = getenv( "FT2_DEBUG" );
- if ( ft2_debug )
- {
- const char* p = ft2_debug;
- const char* q;
- for ( ; *p; p++ )
- {
- /* skip leading whitespace and separators */
- if ( *p == ' ' || *p == '\t' || *p == ',' || *p == ';' || *p == '=' )
- continue;
- /* read toggle name, followed by ':' */
- q = p;
- while ( *p && *p != ':' )
- p++;
-
- if ( *p == ':' && p > q )
- {
- FT_Int n, i, len = (FT_Int)(p - q);
- FT_Int level = -1, found = -1;
- for ( n = 0; n < trace_count; n++ )
- {
- const char* toggle = ft_trace_toggles[n];
- for ( i = 0; i < len; i++ )
- {
- if ( toggle[i] != q[i] )
- break;
- }
- if ( i == len && toggle[i] == 0 )
- {
- found = n;
- break;
- }
- }
- /* read level */
- p++;
- if ( *p )
- {
- level = *p++ - '0';
- if ( level < 0 || level > 6 )
- level = -1;
- }
- if ( found >= 0 && level >= 0 )
- {
- if ( found == trace_any )
- {
- /* special case for "any" */
- for ( n = 0; n < trace_count; n++ )
- ft_trace_levels[n] = level;
- }
- else
- ft_trace_levels[found] = level;
- }
- }
- }
- }
- }
- #else /* !FT_DEBUG_LEVEL_TRACE */
- FT_BASE_DEF( void )
- ft_debug_init( void )
- {
- /* nothing */
- }
- #endif /* !FT_DEBUG_LEVEL_TRACE */
- /* END */
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