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ftdebug.h
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1 /***************************************************************************/
2 /* */
3 /* ftdebug.h */
4 /* */
5 /* Debugging and logging component (specification). */
6 /* */
7 /* Copyright 1996-2001, 2002, 2004, 2006, 2007, 2008, 2009 by */
8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */
9 /* */
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. */
15 /* */
16 /* */
17 /* IMPORTANT: A description of FreeType's debugging support can be */
18 /* found in `docs/DEBUG.TXT'. Read it if you need to use or */
19 /* understand this code. */
20 /* */
21 /***************************************************************************/
22 
23 
24 #ifndef __FTDEBUG_H__
25 #define __FTDEBUG_H__
26 
27 
28 #include <ft2build.h>
29 #include FT_CONFIG_CONFIG_H
30 #include FT_FREETYPE_H
31 
32 
33 FT_BEGIN_HEADER
34 
35 
36  /* force the definition of FT_DEBUG_LEVEL_ERROR if FT_DEBUG_LEVEL_TRACE */
37  /* is already defined; this simplifies the following #ifdefs */
38  /* */
39 #ifdef FT_DEBUG_LEVEL_TRACE
40 #undef FT_DEBUG_LEVEL_ERROR
41 #define FT_DEBUG_LEVEL_ERROR
42 #endif
43 
44 
45  /*************************************************************************/
46  /* */
47  /* Define the trace enums as well as the trace levels array when they */
48  /* are needed. */
49  /* */
50  /*************************************************************************/
51 
52 #ifdef FT_DEBUG_LEVEL_TRACE
53 
54 #define FT_TRACE_DEF( x ) trace_ ## x ,
55 
56  /* defining the enumeration */
57  typedef enum FT_Trace_
58  {
59 #include FT_INTERNAL_TRACE_H
60  trace_count
61 
62  } FT_Trace;
63 
64 
65  /* defining the array of trace levels, provided by `src/base/ftdebug.c' */
66  extern int ft_trace_levels[trace_count];
67 
68 #undef FT_TRACE_DEF
69 
70 #endif /* FT_DEBUG_LEVEL_TRACE */
71 
72 
73  /*************************************************************************/
74  /* */
75  /* Define the FT_TRACE macro */
76  /* */
77  /* IMPORTANT! */
78  /* */
79  /* Each component must define the macro FT_COMPONENT to a valid FT_Trace */
80  /* value before using any TRACE macro. */
81  /* */
82  /*************************************************************************/
83 
84 #ifdef FT_DEBUG_LEVEL_TRACE
85 
86 #define FT_TRACE( level, varformat ) \
87  do \
88  { \
89  if ( ft_trace_levels[FT_COMPONENT] >= level ) \
90  FT_Message varformat; \
91  } while ( 0 )
92 
93 #else /* !FT_DEBUG_LEVEL_TRACE */
94 
95 #define FT_TRACE( level, varformat ) do { } while ( 0 ) /* nothing */
96 
97 #endif /* !FT_DEBUG_LEVEL_TRACE */
98 
99 
100  /*************************************************************************/
101  /* */
102  /* <Function> */
103  /* FT_Trace_Get_Count */
104  /* */
105  /* <Description> */
106  /* Return the number of available trace components. */
107  /* */
108  /* <Return> */
109  /* The number of trace components. 0 if FreeType 2 is not built with */
110  /* FT_DEBUG_LEVEL_TRACE definition. */
111  /* */
112  /* <Note> */
113  /* This function may be useful if you want to access elements of */
114  /* the internal `ft_trace_levels' array by an index. */
115  /* */
116  FT_BASE( FT_Int )
117  FT_Trace_Get_Count( void );
118 
119 
120  /*************************************************************************/
121  /* */
122  /* <Function> */
123  /* FT_Trace_Get_Name */
124  /* */
125  /* <Description> */
126  /* Return the name of a trace component. */
127  /* */
128  /* <Input> */
129  /* The index of the trace component. */
130  /* */
131  /* <Return> */
132  /* The name of the trace component. This is a statically allocated */
133  /* C string, so do not free it after use. NULL if FreeType 2 is not */
134  /* built with FT_DEBUG_LEVEL_TRACE definition. */
135  /* */
136  /* <Note> */
137  /* Use @FT_Trace_Get_Count to get the number of available trace */
138  /* components. */
139  /* */
140  /* This function may be useful if you want to control FreeType 2's */
141  /* debug level in your application. */
142  /* */
143  FT_BASE( const char * )
144  FT_Trace_Get_Name( FT_Int idx );
145 
146 
147  /*************************************************************************/
148  /* */
149  /* You need two opening and closing parentheses! */
150  /* */
151  /* Example: FT_TRACE0(( "Value is %i", foo )) */
152  /* */
153  /* Output of the FT_TRACEX macros is sent to stderr. */
154  /* */
155  /*************************************************************************/
156 
157 #define FT_TRACE0( varformat ) FT_TRACE( 0, varformat )
158 #define FT_TRACE1( varformat ) FT_TRACE( 1, varformat )
159 #define FT_TRACE2( varformat ) FT_TRACE( 2, varformat )
160 #define FT_TRACE3( varformat ) FT_TRACE( 3, varformat )
161 #define FT_TRACE4( varformat ) FT_TRACE( 4, varformat )
162 #define FT_TRACE5( varformat ) FT_TRACE( 5, varformat )
163 #define FT_TRACE6( varformat ) FT_TRACE( 6, varformat )
164 #define FT_TRACE7( varformat ) FT_TRACE( 7, varformat )
165 
166 
167  /*************************************************************************/
168  /* */
169  /* Define the FT_ERROR macro. */
170  /* */
171  /* Output of this macro is sent to stderr. */
172  /* */
173  /*************************************************************************/
174 
175 #ifdef FT_DEBUG_LEVEL_ERROR
176 
177 #define FT_ERROR( varformat ) FT_Message varformat
178 
179 #else /* !FT_DEBUG_LEVEL_ERROR */
180 
181 #define FT_ERROR( varformat ) do { } while ( 0 ) /* nothing */
182 
183 #endif /* !FT_DEBUG_LEVEL_ERROR */
184 
185 
186  /*************************************************************************/
187  /* */
188  /* Define the FT_ASSERT macro. */
189  /* */
190  /*************************************************************************/
191 
192 #ifdef FT_DEBUG_LEVEL_ERROR
193 
194 #define FT_ASSERT( condition ) \
195  do \
196  { \
197  if ( !( condition ) ) \
198  FT_Panic( "assertion failed on line %d of file %s\n", \
199  __LINE__, __FILE__ ); \
200  } while ( 0 )
201 
202 #else /* !FT_DEBUG_LEVEL_ERROR */
203 
204 #define FT_ASSERT( condition ) do { } while ( 0 )
205 
206 #endif /* !FT_DEBUG_LEVEL_ERROR */
207 
208 
209  /*************************************************************************/
210  /* */
211  /* Define `FT_Message' and `FT_Panic' when needed. */
212  /* */
213  /*************************************************************************/
214 
215 #ifdef FT_DEBUG_LEVEL_ERROR
216 
217 #include "stdio.h" /* for vfprintf() */
218 
219  /* print a message */
220  FT_BASE( void )
221  FT_Message( const char* fmt,
222  ... );
223 
224  /* print a message and exit */
225  FT_BASE( void )
226  FT_Panic( const char* fmt,
227  ... );
228 
229 #endif /* FT_DEBUG_LEVEL_ERROR */
230 
231 
232  FT_BASE( void )
233  ft_debug_init( void );
234 
235 
236 #if defined( _MSC_VER ) /* Visual C++ (and Intel C++) */
237 
238  /* We disable the warning `conditional expression is constant' here */
239  /* in order to compile cleanly with the maximum level of warnings. */
240 #pragma warning( disable : 4127 )
241 
242 #endif /* _MSC_VER */
243 
244 
245 FT_END_HEADER
246 
247 #endif /* __FTDEBUG_H__ */
248 
249 
250 /* END */
FT_END_HEADER
#define FT_END_HEADER
Definition: ftheader.h:54
FT_Int
signed int FT_Int
Definition: fttypes.h:216
FT_Trace_Get_Name
FT_Trace_Get_Name(FT_Int idx)
Definition: ftdebug.c:235
FT_BEGIN_HEADER
#define FT_BEGIN_HEADER
Definition: ftheader.h:36
idx
FT_UInt idx
Definition: cffcmap.c:125
FT_Trace_Get_Count
FT_Trace_Get_Count(void)
Definition: ftdebug.c:228
const
#define const
Definition: zconf.h:91
ft_debug_init
ft_debug_init(void)
Definition: ftdebug.c:221
FT_BASE
#define FT_BASE(x)
Definition: ftconfig.h:478