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author | David Walter Seikel | 2013-01-13 17:24:39 +1000 |
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committer | David Walter Seikel | 2013-01-13 17:24:39 +1000 |
commit | 393b5cd1dc438872af89d334ef6e5fcc59f27d47 (patch) | |
tree | 6a14521219942a08a1b95cb2f5a923a9edd60f63 /libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jmemname.c | |
parent | Add a note about rasters suggested start up code. (diff) | |
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Added Irrlicht 1.8, but without all the Windows binaries.
Diffstat (limited to 'libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jmemname.c')
-rw-r--r-- | libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jmemname.c | 276 |
1 files changed, 276 insertions, 0 deletions
diff --git a/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jmemname.c b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jmemname.c new file mode 100644 index 0000000..e28b212 --- /dev/null +++ b/libraries/irrlicht-1.8/source/Irrlicht/jpeglib/jmemname.c | |||
@@ -0,0 +1,276 @@ | |||
1 | /* | ||
2 | * jmemname.c | ||
3 | * | ||
4 | * Copyright (C) 1992-1997, Thomas G. Lane. | ||
5 | * This file is part of the Independent JPEG Group's software. | ||
6 | * For conditions of distribution and use, see the accompanying README file. | ||
7 | * | ||
8 | * This file provides a generic implementation of the system-dependent | ||
9 | * portion of the JPEG memory manager. This implementation assumes that | ||
10 | * you must explicitly construct a name for each temp file. | ||
11 | * Also, the problem of determining the amount of memory available | ||
12 | * is shoved onto the user. | ||
13 | */ | ||
14 | |||
15 | #define JPEG_INTERNALS | ||
16 | #include "jinclude.h" | ||
17 | #include "jpeglib.h" | ||
18 | #include "jmemsys.h" /* import the system-dependent declarations */ | ||
19 | |||
20 | #ifndef HAVE_STDLIB_H /* <stdlib.h> should declare malloc(),free() */ | ||
21 | extern void * malloc JPP((size_t size)); | ||
22 | extern void free JPP((void *ptr)); | ||
23 | #endif | ||
24 | |||
25 | #ifndef SEEK_SET /* pre-ANSI systems may not define this; */ | ||
26 | #define SEEK_SET 0 /* if not, assume 0 is correct */ | ||
27 | #endif | ||
28 | |||
29 | #ifdef DONT_USE_B_MODE /* define mode parameters for fopen() */ | ||
30 | #define READ_BINARY "r" | ||
31 | #define RW_BINARY "w+" | ||
32 | #else | ||
33 | #ifdef VMS /* VMS is very nonstandard */ | ||
34 | #define READ_BINARY "rb", "ctx=stm" | ||
35 | #define RW_BINARY "w+b", "ctx=stm" | ||
36 | #else /* standard ANSI-compliant case */ | ||
37 | #define READ_BINARY "rb" | ||
38 | #define RW_BINARY "w+b" | ||
39 | #endif | ||
40 | #endif | ||
41 | |||
42 | |||
43 | /* | ||
44 | * Selection of a file name for a temporary file. | ||
45 | * This is system-dependent! | ||
46 | * | ||
47 | * The code as given is suitable for most Unix systems, and it is easily | ||
48 | * modified for most non-Unix systems. Some notes: | ||
49 | * 1. The temp file is created in the directory named by TEMP_DIRECTORY. | ||
50 | * The default value is /usr/tmp, which is the conventional place for | ||
51 | * creating large temp files on Unix. On other systems you'll probably | ||
52 | * want to change the file location. You can do this by editing the | ||
53 | * #define, or (preferred) by defining TEMP_DIRECTORY in jconfig.h. | ||
54 | * | ||
55 | * 2. If you need to change the file name as well as its location, | ||
56 | * you can override the TEMP_FILE_NAME macro. (Note that this is | ||
57 | * actually a printf format string; it must contain %s and %d.) | ||
58 | * Few people should need to do this. | ||
59 | * | ||
60 | * 3. mktemp() is used to ensure that multiple processes running | ||
61 | * simultaneously won't select the same file names. If your system | ||
62 | * doesn't have mktemp(), define NO_MKTEMP to do it the hard way. | ||
63 | * (If you don't have <errno.h>, also define NO_ERRNO_H.) | ||
64 | * | ||
65 | * 4. You probably want to define NEED_SIGNAL_CATCHER so that cjpeg.c/djpeg.c | ||
66 | * will cause the temp files to be removed if you stop the program early. | ||
67 | */ | ||
68 | |||
69 | #ifndef TEMP_DIRECTORY /* can override from jconfig.h or Makefile */ | ||
70 | #define TEMP_DIRECTORY "/usr/tmp/" /* recommended setting for Unix */ | ||
71 | #endif | ||
72 | |||
73 | static int next_file_num; /* to distinguish among several temp files */ | ||
74 | |||
75 | #ifdef NO_MKTEMP | ||
76 | |||
77 | #ifndef TEMP_FILE_NAME /* can override from jconfig.h or Makefile */ | ||
78 | #define TEMP_FILE_NAME "%sJPG%03d.TMP" | ||
79 | #endif | ||
80 | |||
81 | #ifndef NO_ERRNO_H | ||
82 | #include <errno.h> /* to define ENOENT */ | ||
83 | #endif | ||
84 | |||
85 | /* ANSI C specifies that errno is a macro, but on older systems it's more | ||
86 | * likely to be a plain int variable. And not all versions of errno.h | ||
87 | * bother to declare it, so we have to in order to be most portable. Thus: | ||
88 | */ | ||
89 | #ifndef errno | ||
90 | extern int errno; | ||
91 | #endif | ||
92 | |||
93 | |||
94 | LOCAL(void) | ||
95 | select_file_name (char * fname) | ||
96 | { | ||
97 | FILE * tfile; | ||
98 | |||
99 | /* Keep generating file names till we find one that's not in use */ | ||
100 | for (;;) { | ||
101 | next_file_num++; /* advance counter */ | ||
102 | sprintf(fname, TEMP_FILE_NAME, TEMP_DIRECTORY, next_file_num); | ||
103 | if ((tfile = fopen(fname, READ_BINARY)) == NULL) { | ||
104 | /* fopen could have failed for a reason other than the file not | ||
105 | * being there; for example, file there but unreadable. | ||
106 | * If <errno.h> isn't available, then we cannot test the cause. | ||
107 | */ | ||
108 | #ifdef ENOENT | ||
109 | if (errno != ENOENT) | ||
110 | continue; | ||
111 | #endif | ||
112 | break; | ||
113 | } | ||
114 | fclose(tfile); /* oops, it's there; close tfile & try again */ | ||
115 | } | ||
116 | } | ||
117 | |||
118 | #else /* ! NO_MKTEMP */ | ||
119 | |||
120 | /* Note that mktemp() requires the initial filename to end in six X's */ | ||
121 | #ifndef TEMP_FILE_NAME /* can override from jconfig.h or Makefile */ | ||
122 | #define TEMP_FILE_NAME "%sJPG%dXXXXXX" | ||
123 | #endif | ||
124 | |||
125 | LOCAL(void) | ||
126 | select_file_name (char * fname) | ||
127 | { | ||
128 | next_file_num++; /* advance counter */ | ||
129 | sprintf(fname, TEMP_FILE_NAME, TEMP_DIRECTORY, next_file_num); | ||
130 | mktemp(fname); /* make sure file name is unique */ | ||
131 | /* mktemp replaces the trailing XXXXXX with a unique string of characters */ | ||
132 | } | ||
133 | |||
134 | #endif /* NO_MKTEMP */ | ||
135 | |||
136 | |||
137 | /* | ||
138 | * Memory allocation and freeing are controlled by the regular library | ||
139 | * routines malloc() and free(). | ||
140 | */ | ||
141 | |||
142 | GLOBAL(void *) | ||
143 | jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject) | ||
144 | { | ||
145 | return (void *) malloc(sizeofobject); | ||
146 | } | ||
147 | |||
148 | GLOBAL(void) | ||
149 | jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject) | ||
150 | { | ||
151 | free(object); | ||
152 | } | ||
153 | |||
154 | |||
155 | /* | ||
156 | * "Large" objects are treated the same as "small" ones. | ||
157 | * NB: although we include FAR keywords in the routine declarations, | ||
158 | * this file won't actually work in 80x86 small/medium model; at least, | ||
159 | * you probably won't be able to process useful-size images in only 64KB. | ||
160 | */ | ||
161 | |||
162 | GLOBAL(void FAR *) | ||
163 | jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject) | ||
164 | { | ||
165 | return (void FAR *) malloc(sizeofobject); | ||
166 | } | ||
167 | |||
168 | GLOBAL(void) | ||
169 | jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject) | ||
170 | { | ||
171 | free(object); | ||
172 | } | ||
173 | |||
174 | |||
175 | /* | ||
176 | * This routine computes the total memory space available for allocation. | ||
177 | * It's impossible to do this in a portable way; our current solution is | ||
178 | * to make the user tell us (with a default value set at compile time). | ||
179 | * If you can actually get the available space, it's a good idea to subtract | ||
180 | * a slop factor of 5% or so. | ||
181 | */ | ||
182 | |||
183 | #ifndef DEFAULT_MAX_MEM /* so can override from makefile */ | ||
184 | #define DEFAULT_MAX_MEM 1000000L /* default: one megabyte */ | ||
185 | #endif | ||
186 | |||
187 | GLOBAL(long) | ||
188 | jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed, | ||
189 | long max_bytes_needed, long already_allocated) | ||
190 | { | ||
191 | return cinfo->mem->max_memory_to_use - already_allocated; | ||
192 | } | ||
193 | |||
194 | |||
195 | /* | ||
196 | * Backing store (temporary file) management. | ||
197 | * Backing store objects are only used when the value returned by | ||
198 | * jpeg_mem_available is less than the total space needed. You can dispense | ||
199 | * with these routines if you have plenty of virtual memory; see jmemnobs.c. | ||
200 | */ | ||
201 | |||
202 | |||
203 | METHODDEF(void) | ||
204 | read_backing_store (j_common_ptr cinfo, backing_store_ptr info, | ||
205 | void FAR * buffer_address, | ||
206 | long file_offset, long byte_count) | ||
207 | { | ||
208 | if (fseek(info->temp_file, file_offset, SEEK_SET)) | ||
209 | ERREXIT(cinfo, JERR_TFILE_SEEK); | ||
210 | if (JFREAD(info->temp_file, buffer_address, byte_count) | ||
211 | != (size_t) byte_count) | ||
212 | ERREXIT(cinfo, JERR_TFILE_READ); | ||
213 | } | ||
214 | |||
215 | |||
216 | METHODDEF(void) | ||
217 | write_backing_store (j_common_ptr cinfo, backing_store_ptr info, | ||
218 | void FAR * buffer_address, | ||
219 | long file_offset, long byte_count) | ||
220 | { | ||
221 | if (fseek(info->temp_file, file_offset, SEEK_SET)) | ||
222 | ERREXIT(cinfo, JERR_TFILE_SEEK); | ||
223 | if (JFWRITE(info->temp_file, buffer_address, byte_count) | ||
224 | != (size_t) byte_count) | ||
225 | ERREXIT(cinfo, JERR_TFILE_WRITE); | ||
226 | } | ||
227 | |||
228 | |||
229 | METHODDEF(void) | ||
230 | close_backing_store (j_common_ptr cinfo, backing_store_ptr info) | ||
231 | { | ||
232 | fclose(info->temp_file); /* close the file */ | ||
233 | unlink(info->temp_name); /* delete the file */ | ||
234 | /* If your system doesn't have unlink(), use remove() instead. | ||
235 | * remove() is the ANSI-standard name for this function, but if | ||
236 | * your system was ANSI you'd be using jmemansi.c, right? | ||
237 | */ | ||
238 | TRACEMSS(cinfo, 1, JTRC_TFILE_CLOSE, info->temp_name); | ||
239 | } | ||
240 | |||
241 | |||
242 | /* | ||
243 | * Initial opening of a backing-store object. | ||
244 | */ | ||
245 | |||
246 | GLOBAL(void) | ||
247 | jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info, | ||
248 | long total_bytes_needed) | ||
249 | { | ||
250 | select_file_name(info->temp_name); | ||
251 | if ((info->temp_file = fopen(info->temp_name, RW_BINARY)) == NULL) | ||
252 | ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name); | ||
253 | info->read_backing_store = read_backing_store; | ||
254 | info->write_backing_store = write_backing_store; | ||
255 | info->close_backing_store = close_backing_store; | ||
256 | TRACEMSS(cinfo, 1, JTRC_TFILE_OPEN, info->temp_name); | ||
257 | } | ||
258 | |||
259 | |||
260 | /* | ||
261 | * These routines take care of any system-dependent initialization and | ||
262 | * cleanup required. | ||
263 | */ | ||
264 | |||
265 | GLOBAL(long) | ||
266 | jpeg_mem_init (j_common_ptr cinfo) | ||
267 | { | ||
268 | next_file_num = 0; /* initialize temp file name generator */ | ||
269 | return DEFAULT_MAX_MEM; /* default for max_memory_to_use */ | ||
270 | } | ||
271 | |||
272 | GLOBAL(void) | ||
273 | jpeg_mem_term (j_common_ptr cinfo) | ||
274 | { | ||
275 | /* no work */ | ||
276 | } | ||