/src/dcmtk/dcmjpeg/libijg8/jmemnobs.c
Line | Count | Source |
1 | | /* |
2 | | * jmemnobs.c |
3 | | * |
4 | | * Copyright (C) 1992-1996, 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 really simple implementation of the system- |
9 | | * dependent portion of the JPEG memory manager. This implementation |
10 | | * assumes that no backing-store files are needed: all required space |
11 | | * can be obtained from malloc(). |
12 | | * This is very portable in the sense that it'll compile on almost anything, |
13 | | * but you'd better have lots of main memory (or virtual memory) if you want |
14 | | * to process big images. |
15 | | * Note that the max_memory_to_use option is ignored by this implementation. |
16 | | */ |
17 | | |
18 | | #define JPEG_INTERNALS |
19 | | #include "jinclude8.h" |
20 | | #include "jpeglib8.h" |
21 | | #include "jmemsys8.h" /* import the system-dependent declarations */ |
22 | | |
23 | | |
24 | | /* |
25 | | * Memory allocation and freeing are controlled by the regular library |
26 | | * routines malloc() and free(). |
27 | | */ |
28 | | |
29 | | GLOBAL(void *) |
30 | | jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject) |
31 | 0 | { |
32 | 0 | (void) cinfo; |
33 | 0 | return (void *) malloc(sizeofobject); |
34 | 0 | } |
35 | | |
36 | | GLOBAL(void) |
37 | | jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject) |
38 | 0 | { |
39 | 0 | (void) cinfo; |
40 | 0 | (void) sizeofobject; |
41 | 0 | free(object); |
42 | 0 | } |
43 | | |
44 | | |
45 | | /* |
46 | | * "Large" objects are treated the same as "small" ones. |
47 | | * NB: although we include FAR keywords in the routine declarations, |
48 | | * this file won't actually work in 80x86 small/medium model; at least, |
49 | | * you probably won't be able to process useful-size images in only 64KB. |
50 | | */ |
51 | | |
52 | | GLOBAL(void FAR *) |
53 | | jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject) |
54 | 0 | { |
55 | 0 | (void) cinfo; |
56 | 0 | return (void FAR *) malloc(sizeofobject); |
57 | 0 | } |
58 | | |
59 | | GLOBAL(void) |
60 | | jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject) |
61 | 0 | { |
62 | 0 | (void) cinfo; |
63 | 0 | (void) sizeofobject; |
64 | 0 | free(object); |
65 | 0 | } |
66 | | |
67 | | |
68 | | /* |
69 | | * This routine computes the total memory space available for allocation. |
70 | | * Here we always say, "we got all you want bud!" |
71 | | */ |
72 | | |
73 | | GLOBAL(long) |
74 | | jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed, |
75 | | long max_bytes_needed, long already_allocated) |
76 | 0 | { |
77 | 0 | (void) cinfo; |
78 | 0 | (void) min_bytes_needed; |
79 | 0 | (void) already_allocated; |
80 | 0 | return max_bytes_needed; |
81 | 0 | } |
82 | | |
83 | | |
84 | | /* |
85 | | * Backing store (temporary file) management. |
86 | | * Since jpeg_mem_available always promised the moon, |
87 | | * this should never be called and we can just error out. |
88 | | */ |
89 | | |
90 | | GLOBAL(void) |
91 | | jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info, |
92 | | long total_bytes_needed) |
93 | 0 | { |
94 | 0 | (void) info; |
95 | 0 | (void) total_bytes_needed; |
96 | 0 | ERREXIT(cinfo, JERR_NO_BACKING_STORE); |
97 | 0 | } |
98 | | |
99 | | |
100 | | /* |
101 | | * These routines take care of any system-dependent initialization and |
102 | | * cleanup required. Here, there isn't any. |
103 | | */ |
104 | | |
105 | | GLOBAL(long) |
106 | | jpeg_mem_init (j_common_ptr cinfo) |
107 | 0 | { |
108 | 0 | (void) cinfo; |
109 | 0 | return 0; /* just set max_memory_to_use to 0 */ |
110 | 0 | } |
111 | | |
112 | | GLOBAL(void) |
113 | | jpeg_mem_term (j_common_ptr cinfo) |
114 | 0 | { |
115 | 0 | (void) cinfo; |
116 | | /* no work */ |
117 | 0 | } |