Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/jbig2dec/jbig2_priv.h @ 21:2f43e400f144

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Provide an "all" target to build both the sdist and the wheel
author Franz Glasner <fzglas.hg@dom66.de>
date Fri, 19 Sep 2025 10:28:53 +0200
parents b50eed0cc0ef
children
Ignore whitespace changes - Everywhere: Within whitespace: At end of lines:
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1 /* Copyright (C) 2001-2023 Artifex Software, Inc.
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2 All Rights Reserved.
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3
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4 This software is provided AS-IS with no warranty, either express or
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5 implied.
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6
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7 This software is distributed under license and may not be copied,
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8 modified or distributed except as expressly authorized under the terms
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9 of the license contained in the file LICENSE in this distribution.
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11 Refer to licensing information at http://www.artifex.com or contact
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12 Artifex Software, Inc., 39 Mesa Street, Suite 108A, San Francisco,
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13 CA 94129, USA, for further information.
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14 */
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16 /*
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17 jbig2dec
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18 */
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20 #ifndef _JBIG2_PRIV_H
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21 #define _JBIG2_PRIV_H
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23 /* To enable Memento predefine MEMENTO while building by setting
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24 CFLAGS=-DMEMENTO. */
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26 /* If we are being compiled as part of a larger project that includes
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27 * Memento, that project should define JBIG_EXTERNAL_MEMENTO_H to point
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28 * to the include file to use.
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29 */
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30 #ifdef JBIG_EXTERNAL_MEMENTO_H
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31 #include JBIG_EXTERNAL_MEMENTO_H
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32 #else
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33 #include "memento.h"
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34 #endif
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36 /* library internals */
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38 /* If we don't have a definition for inline, make it nothing so the code will compile */
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39 #ifndef inline
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40 #define inline
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41 #endif
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43 typedef uint8_t byte;
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45 #define bool int
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47 #ifdef __cplusplus
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48 #define template template_C
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49 #define new new_C
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50 #endif
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52 #ifndef TRUE
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53 #define TRUE 1
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54 #endif
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55 #ifndef FALSE
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56 #define FALSE 0
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57 #endif
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59 #ifndef NULL
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60 #define NULL ((void*)0)
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61 #endif
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63 #if !defined (INT32_MIN)
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64 #define INT32_MIN (-0x7fffffff - 1)
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65 #endif
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66 #if !defined (INT32_MAX)
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67 #define INT32_MAX 0x7fffffff
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68 #endif
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69 #if !defined (UINT32_MAX)
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70 #define UINT32_MAX 0xffffffffu
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71 #endif
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73 typedef struct _Jbig2Page Jbig2Page;
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74 typedef struct _Jbig2Segment Jbig2Segment;
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75
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76 typedef enum {
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77 JBIG2_FILE_HEADER,
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78 JBIG2_FILE_SEQUENTIAL_HEADER,
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79 JBIG2_FILE_SEQUENTIAL_BODY,
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80 JBIG2_FILE_RANDOM_HEADERS,
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81 JBIG2_FILE_RANDOM_BODIES,
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82 JBIG2_FILE_EOF
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83 } Jbig2FileState;
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84
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85 struct _Jbig2Ctx {
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86 Jbig2Allocator *allocator;
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87 Jbig2Options options;
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88 const Jbig2Ctx *global_ctx;
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89 Jbig2ErrorCallback error_callback;
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90 void *error_callback_data;
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91
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92 byte *buf;
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93 size_t buf_size;
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94 size_t buf_rd_ix;
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95 size_t buf_wr_ix;
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97 Jbig2FileState state;
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99 uint8_t file_header_flags;
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100 uint32_t n_pages;
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101
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102 uint32_t n_segments_max;
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103 Jbig2Segment **segments;
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104 uint32_t n_segments; /* index of last segment header parsed */
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105 uint32_t segment_index; /* index of last segment body parsed */
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106
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107 /* list of decoded pages, including the one in progress,
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108 currently stored as a contiguous, 0-indexed array. */
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109 uint32_t current_page;
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110 uint32_t max_page_index;
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111 Jbig2Page *pages;
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112 };
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113
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114 uint32_t jbig2_get_uint32(const byte *bptr);
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115
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116 int32_t jbig2_get_int32(const byte *buf);
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117
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118 uint16_t jbig2_get_uint16(const byte *bptr);
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119
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120 int16_t jbig2_get_int16(const byte *buf);
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121
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122 /* dynamic memory management */
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123 void *jbig2_alloc(Jbig2Allocator *allocator, size_t size, size_t num);
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124
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125 void jbig2_free(Jbig2Allocator *allocator, void *p);
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126
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127 void *jbig2_realloc(Jbig2Allocator *allocator, void *p, size_t size, size_t num);
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128
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129 #define jbig2_new(ctx, t, size) ((t *)jbig2_alloc(ctx->allocator, size, sizeof(t)))
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130
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131 #define jbig2_renew(ctx, p, t, size) ((t *)jbig2_realloc(ctx->allocator, (p), size, sizeof(t)))
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132
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133 int jbig2_error(Jbig2Ctx *ctx, Jbig2Severity severity, uint32_t seg_idx, const char *fmt, ...)
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134 #ifdef __GNUC__
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135 __attribute__ ((format (__printf__, 4, 5)))
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136 #endif
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137 ;
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138
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139 /* The word stream design is a compromise between simplicity and
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140 trying to amortize the number of method calls. Each ::get_next_word
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141 invocation pulls 4 bytes from the stream, packed big-endian into a
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142 32 bit word. The offset argument is provided as a convenience. It
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143 begins at 0 and increments by 4 for each successive invocation. */
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144 typedef struct _Jbig2WordStream Jbig2WordStream;
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145
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146 struct _Jbig2WordStream {
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147 int (*get_next_word)(Jbig2Ctx *ctx, Jbig2WordStream *self, size_t offset, uint32_t *word);
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148 };
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149
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150 Jbig2WordStream *jbig2_word_stream_buf_new(Jbig2Ctx *ctx, const byte *data, size_t size);
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151
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152 void jbig2_word_stream_buf_free(Jbig2Ctx *ctx, Jbig2WordStream *ws);
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153
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154 /* restrict is standard in C99, but not in all C++ compilers. */
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155 #if defined (__STDC_VERSION_) && (__STDC_VERSION__ >= 199901L) /* C99 */
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156 #define JBIG2_RESTRICT restrict
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157 #elif defined(_MSC_VER) && (_MSC_VER >= 1600) /* MSVC 10 or newer */
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158 #define JBIG2_RESTRICT __restrict
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159 #elif defined(__GNUC__) && (__GNUC__ >= 3) /* GCC 3 or newer */
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160 #define JBIG2_RESTRICT __restrict
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161 #else /* Unknown or ancient */
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162 #define JBIG2_RESTRICT
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163 #endif
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164
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165 #endif /* _JBIG2_PRIV_H */