Mercurial > hgrepos > Python2 > PyMuPDF

annotate mupdf-source/thirdparty/brotli/c/enc/memory.h @ 46:7ee69f120f19 default tip

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>>>>> 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 /* Copyright 2016 Google Inc. All Rights Reserved.
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3 Distributed under MIT license.
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4 See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
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5 */
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7 /* Macros for memory management. */
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9 #ifndef BROTLI_ENC_MEMORY_H_
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10 #define BROTLI_ENC_MEMORY_H_
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12 #include <string.h> /* memcpy */
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14 #include <brotli/types.h>
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16 #include "../common/platform.h"
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18 #if defined(__cplusplus) || defined(c_plusplus)
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19 extern "C" {
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20 #endif
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22 #if !defined(BROTLI_ENCODER_CLEANUP_ON_OOM) && \
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23 !defined(BROTLI_ENCODER_EXIT_ON_OOM)
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24 #define BROTLI_ENCODER_EXIT_ON_OOM
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25 #endif
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27 #if !defined(BROTLI_ENCODER_EXIT_ON_OOM)
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28 #if defined(BROTLI_EXPERIMENTAL)
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29 #define BROTLI_ENCODER_MEMORY_MANAGER_SLOTS (48*1024)
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30 #else /* BROTLI_EXPERIMENTAL */
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31 #define BROTLI_ENCODER_MEMORY_MANAGER_SLOTS 256
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32 #endif /* BROTLI_EXPERIMENTAL */
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33 #else /* BROTLI_ENCODER_EXIT_ON_OOM */
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34 #define BROTLI_ENCODER_MEMORY_MANAGER_SLOTS 0
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35 #endif /* BROTLI_ENCODER_EXIT_ON_OOM */
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37 typedef struct MemoryManager {
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38 brotli_alloc_func alloc_func;
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39 brotli_free_func free_func;
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40 void* opaque;
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41 #if !defined(BROTLI_ENCODER_EXIT_ON_OOM)
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42 BROTLI_BOOL is_oom;
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43 size_t perm_allocated;
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44 size_t new_allocated;
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45 size_t new_freed;
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46 void* pointers[BROTLI_ENCODER_MEMORY_MANAGER_SLOTS];
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47 #endif /* BROTLI_ENCODER_EXIT_ON_OOM */
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48 } MemoryManager;
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49
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50 BROTLI_INTERNAL void BrotliInitMemoryManager(
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51 MemoryManager* m, brotli_alloc_func alloc_func, brotli_free_func free_func,
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52 void* opaque);
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53
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54 BROTLI_INTERNAL void* BrotliAllocate(MemoryManager* m, size_t n);
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55 #define BROTLI_ALLOC(M, T, N) \
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56 ((N) > 0 ? ((T*)BrotliAllocate((M), (N) * sizeof(T))) : NULL)
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57
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58 BROTLI_INTERNAL void BrotliFree(MemoryManager* m, void* p);
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59 #define BROTLI_FREE(M, P) { \
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60 BrotliFree((M), (P)); \
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61 P = NULL; \
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62 }
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64 #if defined(BROTLI_ENCODER_EXIT_ON_OOM)
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65 #define BROTLI_IS_OOM(M) (!!0)
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66 #else /* BROTLI_ENCODER_EXIT_ON_OOM */
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67 #define BROTLI_IS_OOM(M) (!!(M)->is_oom)
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68 #endif /* BROTLI_ENCODER_EXIT_ON_OOM */
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69
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70 /*
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71 BROTLI_IS_NULL is a fake check, BROTLI_IS_OOM does the heavy lifting.
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72 The only purpose of it is to explain static analyzers the state of things.
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73 NB: use ONLY together with BROTLI_IS_OOM
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74 AND ONLY for allocations in the current scope.
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75 */
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76 #if defined(__clang_analyzer__) && !defined(BROTLI_ENCODER_EXIT_ON_OOM)
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77 #define BROTLI_IS_NULL(A) ((A) == nullptr)
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78 #else /* defined(__clang_analyzer__) */
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79 #define BROTLI_IS_NULL(A) (!!0)
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80 #endif /* defined(__clang_analyzer__) */
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81
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82 BROTLI_INTERNAL void BrotliWipeOutMemoryManager(MemoryManager* m);
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83
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84 /*
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85 Dynamically grows array capacity to at least the requested size
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86 M: MemoryManager
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87 T: data type
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88 A: array
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89 C: capacity
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90 R: requested size
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91 */
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92 #define BROTLI_ENSURE_CAPACITY(M, T, A, C, R) { \
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93 if (C < (R)) { \
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94 size_t _new_size = (C == 0) ? (R) : C; \
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95 T* new_array; \
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96 while (_new_size < (R)) _new_size *= 2; \
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97 new_array = BROTLI_ALLOC((M), T, _new_size); \
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98 if (!BROTLI_IS_OOM(M) && !BROTLI_IS_NULL(new_array) && C != 0) \
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99 memcpy(new_array, A, C * sizeof(T)); \
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100 BROTLI_FREE((M), A); \
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101 A = new_array; \
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102 C = _new_size; \
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103 } \
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104 }
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105
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106 /*
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107 Appends value and dynamically grows array capacity when needed
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108 M: MemoryManager
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109 T: data type
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110 A: array
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111 C: array capacity
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112 S: array size
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113 V: value to append
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114 */
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115 #define BROTLI_ENSURE_CAPACITY_APPEND(M, T, A, C, S, V) { \
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116 (S)++; \
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117 BROTLI_ENSURE_CAPACITY(M, T, A, C, S); \
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118 A[(S) - 1] = (V); \
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119 }
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120
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121 /* "Bootstrap" allocations are not tracked by memory manager; should be used
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122 only to allocate MemoryManager itself (or structure containing it). */
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123 BROTLI_INTERNAL void* BrotliBootstrapAlloc(size_t size,
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124 brotli_alloc_func alloc_func, brotli_free_func free_func, void* opaque);
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125 BROTLI_INTERNAL void BrotliBootstrapFree(void* address, MemoryManager* m);
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126
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127 #if defined(__cplusplus) || defined(c_plusplus)
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128 } /* extern "C" */
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129 #endif
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130
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131 #endif /* BROTLI_ENC_MEMORY_H_ */