| /***************************************************************************/ |
| /* */ |
| /* ftdebug.c */ |
| /* */ |
| /* Debugging and logging component (body). */ |
| /* */ |
| /* Copyright 1996-2001, 2002, 2004 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 |
| |
| |
| /* documentation is in ftdebug.h */ |
| |
| FT_EXPORT_DEF( FT_Int ) |
| FT_Trace_Get_Count( void ) |
| { |
| return trace_count; |
| } |
| |
| |
| /* documentation is in ftdebug.h */ |
| |
| FT_EXPORT_DEF( const char * ) |
| FT_Trace_Get_Name( FT_Int idx ) |
| { |
| int max = FT_Trace_Get_Count(); |
| |
| |
| if ( idx < max ) |
| return ft_trace_toggles[idx]; |
| else |
| return NULL; |
| } |
| |
| |
| /*************************************************************************/ |
| /* */ |
| /* 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: */ |
| /* */ |
| /* export FT2_DEBUG="any:3 memory:6 stream:5" */ |
| /* */ |
| /* This requests 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 <include/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 */ |
| } |
| |
| |
| FT_EXPORT_DEF( FT_Int ) |
| FT_Trace_Get_Count( void ) |
| { |
| return 0; |
| } |
| |
| |
| FT_EXPORT_DEF( const char * ) |
| FT_Trace_Get_Name( FT_Int idx ) |
| { |
| return NULL; |
| } |
| |
| |
| #endif /* !FT_DEBUG_LEVEL_TRACE */ |
| |
| |
| /* END */ |