annotate mupdf-source/thirdparty/libjpeg/jmemmac.c @ 46:7ee69f120f19 default tip

>>>>> tag v1.26.5+1 for changeset b74429b0f5c4
author Franz Glasner <fzglas.hg@dom66.de>
date Sat, 11 Oct 2025 17:17:30 +0200
parents b50eed0cc0ef
children
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1 /*
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2 * jmemmac.c
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3 *
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4 * Copyright (C) 1992-1997, Thomas G. Lane.
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5 * This file is part of the Independent JPEG Group's software.
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6 * For conditions of distribution and use, see the accompanying README file.
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7 *
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8 * jmemmac.c provides an Apple Macintosh implementation of the system-
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9 * dependent portion of the JPEG memory manager.
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10 *
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11 * If you use jmemmac.c, then you must define USE_MAC_MEMMGR in the
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12 * JPEG_INTERNALS part of jconfig.h.
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13 *
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14 * jmemmac.c uses the Macintosh toolbox routines NewPtr and DisposePtr
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15 * instead of malloc and free. It accurately determines the amount of
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16 * memory available by using CompactMem. Notice that if left to its
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17 * own devices, this code can chew up all available space in the
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18 * application's zone, with the exception of the rather small "slop"
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19 * factor computed in jpeg_mem_available(). The application can ensure
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20 * that more space is left over by reducing max_memory_to_use.
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21 *
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22 * Large images are swapped to disk using temporary files and System 7.0+'s
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23 * temporary folder functionality.
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24 *
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25 * Note that jmemmac.c depends on two features of MacOS that were first
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26 * introduced in System 7: FindFolder and the FSSpec-based calls.
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27 * If your application uses jmemmac.c and is run under System 6 or earlier,
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28 * and the jpeg library decides it needs a temporary file, it will abort,
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29 * printing error messages about requiring System 7. (If no temporary files
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30 * are created, it will run fine.)
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31 *
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32 * If you want to use jmemmac.c in an application that might be used with
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33 * System 6 or earlier, then you should remove dependencies on FindFolder
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34 * and the FSSpec calls. You will need to replace FindFolder with some
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35 * other mechanism for finding a place to put temporary files, and you
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36 * should replace the FSSpec calls with their HFS equivalents:
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37 *
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38 * FSpDelete -> HDelete
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39 * FSpGetFInfo -> HGetFInfo
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40 * FSpCreate -> HCreate
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41 * FSpOpenDF -> HOpen *** Note: not HOpenDF ***
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42 * FSMakeFSSpec -> (fill in spec by hand.)
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43 *
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44 * (Use HOpen instead of HOpenDF. HOpen is just a glue-interface to PBHOpen,
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45 * which is on all HFS macs. HOpenDF is a System 7 addition which avoids the
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46 * ages-old problem of names starting with a period.)
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47 *
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48 * Contributed by Sam Bushell (jsam@iagu.on.net) and
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49 * Dan Gildor (gyld@in-touch.com).
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50 */
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51
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52 #define JPEG_INTERNALS
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53 #include "jinclude.h"
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54 #include "jpeglib.h"
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55 #include "jmemsys.h" /* import the system-dependent declarations */
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56
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57 #ifndef USE_MAC_MEMMGR /* make sure user got configuration right */
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58 You forgot to define USE_MAC_MEMMGR in jconfig.h. /* deliberate syntax error */
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59 #endif
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60
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61 #include <Memory.h> /* we use the MacOS memory manager */
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62 #include <Files.h> /* we use the MacOS File stuff */
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63 #include <Folders.h> /* we use the MacOS HFS stuff */
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64 #include <Script.h> /* for smSystemScript */
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65 #include <Gestalt.h> /* we use Gestalt to test for specific functionality */
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66
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67 #ifndef TEMP_FILE_NAME /* can override from jconfig.h or Makefile */
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68 #define TEMP_FILE_NAME "JPG%03d.TMP"
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69 #endif
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70
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71 static int next_file_num; /* to distinguish among several temp files */
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72
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73
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74 /*
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75 * Memory allocation and freeing are controlled by the MacOS library
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76 * routines NewPtr() and DisposePtr(), which allocate fixed-address
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77 * storage. Unfortunately, the IJG library isn't smart enough to cope
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78 * with relocatable storage.
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79 */
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80
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81 GLOBAL(void *)
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82 jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
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83 {
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84 return (void *) NewPtr(sizeofobject);
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85 }
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86
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87 GLOBAL(void)
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88 jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
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89 {
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90 DisposePtr((Ptr) object);
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91 }
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92
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93
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94 /*
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95 * "Large" objects are treated the same as "small" ones.
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96 * NB: we include FAR keywords in the routine declarations simply for
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97 * consistency with the rest of the IJG code; FAR should expand to empty
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98 * on rational architectures like the Mac.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
99 */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
100
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parents:
diff changeset
101 GLOBAL(void FAR *)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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diff changeset
102 jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
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parents:
diff changeset
103 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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diff changeset
104 return (void FAR *) NewPtr(sizeofobject);
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parents:
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105 }
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diff changeset
106
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parents:
diff changeset
107 GLOBAL(void)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
108 jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
109 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
110 DisposePtr((Ptr) object);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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111 }
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parents:
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112
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113
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parents:
diff changeset
114 /*
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115 * This routine computes the total memory space available for allocation.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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116 */
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117
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diff changeset
118 GLOBAL(long)
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diff changeset
119 jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
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diff changeset
120 long max_bytes_needed, long already_allocated)
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parents:
diff changeset
121 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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diff changeset
122 long limit = cinfo->mem->max_memory_to_use - already_allocated;
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Franz Glasner <fzglas.hg@dom66.de>
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123 long slop, mem;
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124
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diff changeset
125 /* Don't ask for more than what application has told us we may use */
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126 if (max_bytes_needed > limit && limit > 0)
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127 max_bytes_needed = limit;
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parents:
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128 /* Find whether there's a big enough free block in the heap.
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129 * CompactMem tries to create a contiguous block of the requested size,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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130 * and then returns the size of the largest free block (which could be
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
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131 * much more or much less than we asked for).
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132 * We add some slop to ensure we don't use up all available memory.
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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133 */
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134 slop = max_bytes_needed / 16 + 32768L;
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parents:
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135 mem = CompactMem(max_bytes_needed + slop) - slop;
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parents:
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136 if (mem < 0)
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137 mem = 0; /* sigh, couldn't even get the slop */
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parents:
diff changeset
138 /* Don't take more than the application says we can have */
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parents:
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139 if (mem > limit && limit > 0)
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140 mem = limit;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
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141 return mem;
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142 }
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143
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144
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145 /*
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146 * Backing store (temporary file) management.
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Franz Glasner <fzglas.hg@dom66.de>
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147 * Backing store objects are only used when the value returned by
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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148 * jpeg_mem_available is less than the total space needed. You can dispense
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
149 * with these routines if you have plenty of virtual memory; see jmemnobs.c.
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150 */
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diff changeset
151
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152
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diff changeset
153 METHODDEF(void)
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diff changeset
154 read_backing_store (j_common_ptr cinfo, backing_store_ptr info,
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parents:
diff changeset
155 void FAR * buffer_address,
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parents:
diff changeset
156 long file_offset, long byte_count)
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parents:
diff changeset
157 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
158 long bytes = byte_count;
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parents:
diff changeset
159 long retVal;
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parents:
diff changeset
160
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parents:
diff changeset
161 if ( SetFPos ( info->temp_file, fsFromStart, file_offset ) != noErr )
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
162 ERREXIT(cinfo, JERR_TFILE_SEEK);
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163
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diff changeset
164 retVal = FSRead ( info->temp_file, &bytes,
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diff changeset
165 (unsigned char *) buffer_address );
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parents:
diff changeset
166 if ( retVal != noErr || bytes != byte_count )
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parents:
diff changeset
167 ERREXIT(cinfo, JERR_TFILE_READ);
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parents:
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168 }
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parents:
diff changeset
169
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170
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parents:
diff changeset
171 METHODDEF(void)
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diff changeset
172 write_backing_store (j_common_ptr cinfo, backing_store_ptr info,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
173 void FAR * buffer_address,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
174 long file_offset, long byte_count)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
175 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
176 long bytes = byte_count;
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parents:
diff changeset
177 long retVal;
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diff changeset
178
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parents:
diff changeset
179 if ( SetFPos ( info->temp_file, fsFromStart, file_offset ) != noErr )
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
180 ERREXIT(cinfo, JERR_TFILE_SEEK);
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parents:
diff changeset
181
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parents:
diff changeset
182 retVal = FSWrite ( info->temp_file, &bytes,
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parents:
diff changeset
183 (unsigned char *) buffer_address );
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
184 if ( retVal != noErr || bytes != byte_count )
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
185 ERREXIT(cinfo, JERR_TFILE_WRITE);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
186 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
187
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parents:
diff changeset
188
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parents:
diff changeset
189 METHODDEF(void)
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
190 close_backing_store (j_common_ptr cinfo, backing_store_ptr info)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
191 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
192 FSClose ( info->temp_file );
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
193 FSpDelete ( &(info->tempSpec) );
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
194 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
195
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
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parents:
diff changeset
196
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
197 /*
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
198 * Initial opening of a backing-store object.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
199 *
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
200 * This version uses FindFolder to find the Temporary Items folder,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
201 * and puts the temporary file in there.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
202 */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
203
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
204 GLOBAL(void)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
205 jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
206 long total_bytes_needed)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
207 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
208 short tmpRef, vRefNum;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
209 long dirID;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
210 FInfo finderInfo;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
211 FSSpec theSpec;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
212 Str255 fName;
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
213 OSErr osErr;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
214 long gestaltResponse = 0;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
215
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
216 /* Check that FSSpec calls are available. */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
217 osErr = Gestalt( gestaltFSAttr, &gestaltResponse );
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
218 if ( ( osErr != noErr )
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219 || !( gestaltResponse & (1<<gestaltHasFSSpecCalls) ) )
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
220 ERREXITS(cinfo, JERR_TFILE_CREATE, "- System 7.0 or later required");
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
221 /* TO DO: add a proper error message to jerror.h. */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
222
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
223 /* Check that FindFolder is available. */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
224 osErr = Gestalt( gestaltFindFolderAttr, &gestaltResponse );
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
225 if ( ( osErr != noErr )
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
226 || !( gestaltResponse & (1<<gestaltFindFolderPresent) ) )
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
227 ERREXITS(cinfo, JERR_TFILE_CREATE, "- System 7.0 or later required.");
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
228 /* TO DO: add a proper error message to jerror.h. */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
229
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
230 osErr = FindFolder ( kOnSystemDisk, kTemporaryFolderType, kCreateFolder,
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
231 &vRefNum, &dirID );
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
232 if ( osErr != noErr )
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
233 ERREXITS(cinfo, JERR_TFILE_CREATE, "- temporary items folder unavailable");
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
234 /* TO DO: Try putting the temp files somewhere else. */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
235
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
236 /* Keep generating file names till we find one that's not in use */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
237 for (;;) {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
238 next_file_num++; /* advance counter */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
239
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
240 sprintf(info->temp_name, TEMP_FILE_NAME, next_file_num);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
241 strcpy ( (Ptr)fName+1, info->temp_name );
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
242 *fName = strlen (info->temp_name);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
243 osErr = FSMakeFSSpec ( vRefNum, dirID, fName, &theSpec );
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
244
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Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
245 if ( (osErr = FSpGetFInfo ( &theSpec, &finderInfo ) ) != noErr )
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
246 break;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
247 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
248
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
249 osErr = FSpCreate ( &theSpec, '????', '????', smSystemScript );
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
250 if ( osErr != noErr )
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
251 ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
252
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
253 osErr = FSpOpenDF ( &theSpec, fsRdWrPerm, &(info->temp_file) );
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
254 if ( osErr != noErr )
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
255 ERREXITS(cinfo, JERR_TFILE_CREATE, info->temp_name);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
256
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
257 info->tempSpec = theSpec;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
258
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
259 info->read_backing_store = read_backing_store;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
260 info->write_backing_store = write_backing_store;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
261 info->close_backing_store = close_backing_store;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
262 TRACEMSS(cinfo, 1, JTRC_TFILE_OPEN, info->temp_name);
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
263 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
264
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
265
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
266 /*
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
267 * These routines take care of any system-dependent initialization and
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
268 * cleanup required.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
269 */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
270
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
271 GLOBAL(long)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
272 jpeg_mem_init (j_common_ptr cinfo)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
273 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
274 next_file_num = 0;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
275
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
276 /* max_memory_to_use will be initialized to FreeMem()'s result;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
277 * the calling application might later reduce it, for example
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
278 * to leave room to invoke multiple JPEG objects.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
279 * Note that FreeMem returns the total number of free bytes;
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
280 * it may not be possible to allocate a single block of this size.
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
281 */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
282 return FreeMem();
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
283 }
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
284
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
285 GLOBAL(void)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
286 jpeg_mem_term (j_common_ptr cinfo)
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
287 {
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
288 /* no work */
b50eed0cc0ef ADD: MuPDF v1.26.7: the MuPDF source as downloaded by a default build of PyMuPDF 1.26.4.
Franz Glasner <fzglas.hg@dom66.de>
parents:
diff changeset
289 }