1 /***************************************************************************/
2 /* */
3 /* ftsystem.c */
4 /* */
5 /* VMS-specific FreeType low-level system interface (body). */
6 /* */
7 /* Copyright (C) 1996-2023 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
18
19 #include <ft2build.h>
20 /* we use our special ftconfig.h file, not the standard one */
21 #include <ftconfig.h>
22 #include <freetype/internal/ftdebug.h>
23 #include <freetype/ftsystem.h>
24 #include <freetype/fterrors.h>
25 #include <freetype/fttypes.h>
26 #include <freetype/internal/ftobjs.h>
27
28 /* memory-mapping includes and definitions */
29 #ifdef HAVE_UNISTD_H
30 #include <unistd.h>
31 #endif
32
33 #include <sys/mman.h>
34 #ifndef MAP_FILE
35 #define MAP_FILE 0x00
36 #endif
37
38 #ifdef MUNMAP_USES_VOIDP
39 #define MUNMAP_ARG_CAST void *
40 #else
41 #define MUNMAP_ARG_CAST char *
42 #endif
43
44 #ifdef NEED_MUNMAP_DECL
45
46 #ifdef __cplusplus
47 extern "C"
48 #else
49 extern
50 #endif
51 int
52 munmap( char* addr,
53 int len );
54
55 #define MUNMAP_ARG_CAST char *
56
57 #endif /* NEED_DECLARATION_MUNMAP */
58
59
60 #include <sys/types.h>
61 #include <sys/stat.h>
62
63 #ifdef HAVE_FCNTL_H
64 #include <fcntl.h>
65 #endif
66
67 #include <stdio.h>
68 #include <stdlib.h>
69 #include <string.h>
70
71
72 /*************************************************************************/
73 /* */
74 /* MEMORY MANAGEMENT INTERFACE */
75 /* */
76 /*************************************************************************/
77
78
79 /*************************************************************************/
80 /* */
81 /* <Function> */
82 /* ft_alloc */
83 /* */
84 /* <Description> */
85 /* The memory allocation function. */
86 /* */
87 /* <Input> */
88 /* memory :: A pointer to the memory object. */
89 /* */
90 /* size :: The requested size in bytes. */
91 /* */
92 /* <Return> */
93 /* The address of newly allocated block. */
94 /* */
95 FT_CALLBACK_DEF( void* )
96 ft_alloc( FT_Memory memory,
97 long size )
98 {
99 FT_UNUSED( memory );
100
101 return malloc( size );
102 }
103
104
105 /*************************************************************************/
106 /* */
107 /* <Function> */
108 /* ft_realloc */
109 /* */
110 /* <Description> */
111 /* The memory reallocation function. */
112 /* */
113 /* <Input> */
114 /* memory :: A pointer to the memory object. */
115 /* */
116 /* cur_size :: The current size of the allocated memory block. */
117 /* */
118 /* new_size :: The newly requested size in bytes. */
119 /* */
120 /* block :: The current address of the block in memory. */
121 /* */
122 /* <Return> */
123 /* The address of the reallocated memory block. */
124 /* */
125 FT_CALLBACK_DEF( void* )
126 ft_realloc( FT_Memory memory,
127 long cur_size,
128 long new_size,
129 void* block )
130 {
131 FT_UNUSED( memory );
132 FT_UNUSED( cur_size );
133
134 return realloc( block, new_size );
135 }
136
137
138 /*************************************************************************/
139 /* */
140 /* <Function> */
141 /* ft_free */
142 /* */
143 /* <Description> */
144 /* The memory release function. */
145 /* */
146 /* <Input> */
147 /* memory :: A pointer to the memory object. */
148 /* */
149 /* block :: The address of block in memory to be freed. */
150 /* */
151 FT_CALLBACK_DEF( void )
152 ft_free( FT_Memory memory,
153 void* block )
154 {
155 FT_UNUSED( memory );
156
157 free( block );
158 }
159
160
161 /*************************************************************************/
162 /* */
163 /* RESOURCE MANAGEMENT INTERFACE */
164 /* */
165 /*************************************************************************/
166
167
168 /*************************************************************************/
169 /* */
170 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */
171 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
172 /* messages during execution. */
173 /* */
174 #undef FT_COMPONENT
175 #define FT_COMPONENT io
176
177 /* We use the macro STREAM_FILE for convenience to extract the */
178 /* system-specific stream handle from a given FreeType stream object */
179 #define STREAM_FILE( stream ) ( (FILE*)stream->descriptor.pointer )
180
181
182 /*************************************************************************/
183 /* */
184 /* <Function> */
185 /* ft_close_stream */
186 /* */
187 /* <Description> */
188 /* The function to close a stream. */
189 /* */
190 /* <Input> */
191 /* stream :: A pointer to the stream object. */
192 /* */
193 FT_CALLBACK_DEF( void )
194 ft_close_stream( FT_Stream stream )
195 {
196 munmap( (MUNMAP_ARG_CAST)stream->descriptor.pointer, stream->size );
197
198 stream->descriptor.pointer = NULL;
199 stream->size = 0;
200 stream->base = NULL;
201 }
202
203
204 /* documentation is in ftobjs.h */
205
206 FT_BASE_DEF( FT_Error )
207 FT_Stream_Open( FT_Stream stream,
208 const char* filepathname )
209 {
210 int file;
211 struct stat stat_buf;
212
213
214 if ( !stream )
215 return FT_THROW( Invalid_Stream_Handle );
216
217 /* open the file */
218 file = open( filepathname, O_RDONLY );
219 if ( file < 0 )
220 {
221 FT_ERROR(( "FT_Stream_Open:" ));
222 FT_ERROR(( " could not open `%s'\n", filepathname ));
223 return FT_THROW( Cannot_Open_Resource );
224 }
225
226 if ( fstat( file, &stat_buf ) < 0 )
227 {
228 FT_ERROR(( "FT_Stream_Open:" ));
229 FT_ERROR(( " could not `fstat' file `%s'\n", filepathname ));
230 goto Fail_Map;
231 }
232
233 stream->size = stat_buf.st_size;
234 if ( !stream->size )
235 {
236 FT_ERROR(( "FT_Stream_Open:" ));
237 FT_ERROR(( " opened `%s' but zero-sized\n", filepathname ));
238 goto Fail_Map;
239 }
240
241 stream->pos = 0;
242 stream->base = (unsigned char *)mmap( NULL,
243 stream->size,
244 PROT_READ,
245 MAP_FILE | MAP_PRIVATE,
246 file,
247 0 );
248
249 if ( stream->base == MAP_FAILED )
250 {
251 FT_ERROR(( "FT_Stream_Open:" ));
252 FT_ERROR(( " could not `mmap' file `%s'\n", filepathname ));
253 goto Fail_Map;
254 }
255
256 close( file );
257
258 stream->descriptor.pointer = stream->base;
259 stream->pathname.pointer = (char*)filepathname;
260
261 stream->close = ft_close_stream;
262 stream->read = NULL;
263
264 FT_TRACE1(( "FT_Stream_Open:" ));
265 FT_TRACE1(( " opened `%s' (%d bytes) successfully\n",
266 filepathname, stream->size ));
267
268 return FT_Err_Ok;
269
270 Fail_Map:
271 close( file );
272
273 stream->base = NULL;
274 stream->size = 0;
275 stream->pos = 0;
276
277 return FT_THROW( Cannot_Open_Stream );
278 }
279
280
281 #ifdef FT_DEBUG_MEMORY
282
283 extern FT_Int
284 ft_mem_debug_init( FT_Memory memory );
285
286 extern void
287 ft_mem_debug_done( FT_Memory memory );
288
289 #endif
290
291
292 /* documentation is in ftobjs.h */
293
294 FT_BASE_DEF( FT_Memory )
295 FT_New_Memory( void )
296 {
297 FT_Memory memory;
298
299
300 memory = (FT_Memory)malloc( sizeof ( *memory ) );
301 if ( memory )
302 {
303 memory->user = NULL;
304 memory->alloc = ft_alloc;
305 memory->realloc = ft_realloc;
306 memory->free = ft_free;
307 #ifdef FT_DEBUG_MEMORY
308 ft_mem_debug_init( memory );
309 #endif
310 }
311
312 return memory;
313 }
314
315
316 /* documentation is in ftobjs.h */
317
318 FT_BASE_DEF( void )
319 FT_Done_Memory( FT_Memory memory )
320 {
321 #ifdef FT_DEBUG_MEMORY
322 ft_mem_debug_done( memory );
323 #endif
324 memory->free( memory, memory );
325 }
326
327
328 /* END */