1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
|
#pragma once
/*
Low level interface to Meta's zstd library for use in the compression.zstd
Python module.
*/
/* Declarations shared between different parts of the _zstd module*/
#include "Python.h"
#include "zstd.h"
#include "zdict.h"
/* Forward declaration of module state */
typedef struct _zstd_state _zstd_state;
/* Forward reference of module def */
extern PyModuleDef _zstdmodule;
/* For clinic type calculations */
static inline _zstd_state *
get_zstd_state_from_type(PyTypeObject *type)
{
PyObject *module = PyType_GetModuleByDef(type, &_zstdmodule);
if (module == NULL) {
return NULL;
}
void *state = PyModule_GetState(module);
assert(state != NULL);
return (_zstd_state *)state;
}
extern PyType_Spec zstd_dict_type_spec;
extern PyType_Spec zstd_compressor_type_spec;
extern PyType_Spec zstd_decompressor_type_spec;
struct _zstd_state {
PyTypeObject *ZstdDict_type;
PyTypeObject *ZstdCompressor_type;
PyTypeObject *ZstdDecompressor_type;
PyObject *ZstdError;
PyTypeObject *CParameter_type;
PyTypeObject *DParameter_type;
};
typedef struct {
PyObject_HEAD
/* Reusable compress/decompress dictionary, they are created once and
can be shared by multiple threads concurrently, since its usage is
read-only.
c_dicts is a dict, int(compressionLevel):PyCapsule(ZSTD_CDict*) */
ZSTD_DDict *d_dict;
PyObject *c_dicts;
/* Content of the dictionary, bytes object. */
PyObject *dict_content;
/* Dictionary id */
uint32_t dict_id;
/* __init__ has been called, 0 or 1. */
int inited;
} ZstdDict;
typedef struct {
PyObject_HEAD
/* Compression context */
ZSTD_CCtx *cctx;
/* ZstdDict object in use */
PyObject *dict;
/* Last mode, initialized to ZSTD_e_end */
int last_mode;
/* (nbWorker >= 1) ? 1 : 0 */
int use_multithread;
/* Compression level */
int compression_level;
/* __init__ has been called, 0 or 1. */
int inited;
} ZstdCompressor;
typedef struct {
PyObject_HEAD
/* Decompression context */
ZSTD_DCtx *dctx;
/* ZstdDict object in use */
PyObject *dict;
/* Unconsumed input data */
char *input_buffer;
size_t input_buffer_size;
size_t in_begin, in_end;
/* Unused data */
PyObject *unused_data;
/* 0 if decompressor has (or may has) unconsumed input data, 0 or 1. */
char needs_input;
/* For decompress(), 0 or 1.
1 when both input and output streams are at a frame edge, means a
frame is completely decoded and fully flushed, or the decompressor
just be initialized. */
char at_frame_edge;
/* For ZstdDecompressor, 0 or 1.
1 means the end of the first frame has been reached. */
char eof;
/* Used for fast reset above three variables */
char _unused_char_for_align;
/* __init__ has been called, 0 or 1. */
int inited;
} ZstdDecompressor;
typedef enum {
TYPE_DECOMPRESSOR, // <D>, ZstdDecompressor class
TYPE_ENDLESS_DECOMPRESSOR, // <E>, decompress() function
} decompress_type;
typedef enum {
ERR_DECOMPRESS,
ERR_COMPRESS,
ERR_LOAD_D_DICT,
ERR_LOAD_C_DICT,
ERR_GET_C_BOUNDS,
ERR_GET_D_BOUNDS,
ERR_SET_C_LEVEL,
ERR_TRAIN_DICT,
ERR_FINALIZE_DICT,
} error_type;
typedef enum {
DICT_TYPE_DIGESTED = 0,
DICT_TYPE_UNDIGESTED = 1,
DICT_TYPE_PREFIX = 2
} dictionary_type;
static inline int
mt_continue_should_break(ZSTD_inBuffer *in, ZSTD_outBuffer *out)
{
return in->size == in->pos && out->size != out->pos;
}
/* Format error message and set ZstdError. */
extern void
set_zstd_error(const _zstd_state* const state,
const error_type type, size_t zstd_ret);
extern void
set_parameter_error(const _zstd_state* const state, int is_compress,
int key_v, int value_v);
static const char init_twice_msg[] = "__init__ method is called twice.";
|
