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
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
|
/*
* This file is part of the MicroPython project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2014-2016 Paul Sokolovsky
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <stdio.h>
#include <string.h>
#include "py/runtime.h"
#include "py/stream.h"
#include "py/mperrno.h"
#if MICROPY_PY_UZLIB
#include "lib/uzlib/tinf.h"
#if 0 // print debugging info
#define DEBUG_printf DEBUG_printf
#else // don't print debugging info
#define DEBUG_printf(...) (void)0
#endif
typedef struct _mp_obj_decompio_t {
mp_obj_base_t base;
mp_obj_t src_stream;
TINF_DATA decomp;
bool eof;
} mp_obj_decompio_t;
STATIC int read_src_stream(TINF_DATA *data) {
byte *p = (void *)data;
p -= offsetof(mp_obj_decompio_t, decomp);
mp_obj_decompio_t *self = (mp_obj_decompio_t *)p;
const mp_stream_p_t *stream = mp_get_stream(self->src_stream);
int err;
byte c;
mp_uint_t out_sz = stream->read(self->src_stream, &c, 1, &err);
if (out_sz == MP_STREAM_ERROR) {
mp_raise_OSError(err);
}
if (out_sz == 0) {
mp_raise_type(&mp_type_EOFError);
}
return c;
}
STATIC mp_obj_t decompio_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 1, 2, false);
mp_get_stream_raise(args[0], MP_STREAM_OP_READ);
mp_obj_decompio_t *o = mp_obj_malloc(mp_obj_decompio_t, type);
memset(&o->decomp, 0, sizeof(o->decomp));
o->decomp.readSource = read_src_stream;
o->src_stream = args[0];
o->eof = false;
mp_int_t dict_opt = 0;
uint dict_sz;
if (n_args > 1) {
dict_opt = mp_obj_get_int(args[1]);
}
if (dict_opt >= 16) {
int st = uzlib_gzip_parse_header(&o->decomp);
if (st != TINF_OK) {
goto header_error;
}
dict_sz = 1 << (dict_opt - 16);
} else if (dict_opt >= 0) {
dict_opt = uzlib_zlib_parse_header(&o->decomp);
if (dict_opt < 0) {
header_error:
mp_raise_ValueError(MP_ERROR_TEXT("compression header"));
}
// RFC 1950 section 2.2:
// CINFO is the base-2 logarithm of the LZ77 window size,
// minus eight (CINFO=7 indicates a 32K window size)
dict_sz = 1 << (dict_opt + 8);
} else {
dict_sz = 1 << -dict_opt;
}
uzlib_uncompress_init(&o->decomp, m_new(byte, dict_sz), dict_sz);
return MP_OBJ_FROM_PTR(o);
}
STATIC mp_uint_t decompio_read(mp_obj_t o_in, void *buf, mp_uint_t size, int *errcode) {
mp_obj_decompio_t *o = MP_OBJ_TO_PTR(o_in);
if (o->eof) {
return 0;
}
o->decomp.dest = buf;
o->decomp.dest_limit = (byte *)buf + size;
int st = uzlib_uncompress_chksum(&o->decomp);
if (st == TINF_DONE) {
o->eof = true;
}
if (st < 0) {
DEBUG_printf("uncompress error=" INT_FMT "\n", st);
*errcode = MP_EINVAL;
return MP_STREAM_ERROR;
}
return o->decomp.dest - (byte *)buf;
}
#if !MICROPY_ENABLE_DYNRUNTIME
STATIC const mp_rom_map_elem_t decompio_locals_dict_table[] = {
{ MP_ROM_QSTR(MP_QSTR_read), MP_ROM_PTR(&mp_stream_read_obj) },
{ MP_ROM_QSTR(MP_QSTR_readinto), MP_ROM_PTR(&mp_stream_readinto_obj) },
{ MP_ROM_QSTR(MP_QSTR_readline), MP_ROM_PTR(&mp_stream_unbuffered_readline_obj) },
};
STATIC MP_DEFINE_CONST_DICT(decompio_locals_dict, decompio_locals_dict_table);
#endif
STATIC const mp_stream_p_t decompio_stream_p = {
.read = decompio_read,
};
#if !MICROPY_ENABLE_DYNRUNTIME
STATIC const mp_obj_type_t decompio_type = {
{ &mp_type_type },
.name = MP_QSTR_DecompIO,
.make_new = decompio_make_new,
.protocol = &decompio_stream_p,
.locals_dict = (void *)&decompio_locals_dict,
};
#endif
STATIC mp_obj_t mod_uzlib_decompress(size_t n_args, const mp_obj_t *args) {
mp_obj_t data = args[0];
mp_buffer_info_t bufinfo;
mp_get_buffer_raise(data, &bufinfo, MP_BUFFER_READ);
TINF_DATA *decomp = m_new_obj(TINF_DATA);
memset(decomp, 0, sizeof(*decomp));
DEBUG_printf("sizeof(TINF_DATA)=" UINT_FMT "\n", sizeof(*decomp));
uzlib_uncompress_init(decomp, NULL, 0);
mp_uint_t dest_buf_size = (bufinfo.len + 15) & ~15;
byte *dest_buf = m_new(byte, dest_buf_size);
decomp->dest = dest_buf;
decomp->dest_limit = dest_buf + dest_buf_size;
DEBUG_printf("uzlib: Initial out buffer: " UINT_FMT " bytes\n", dest_buf_size);
decomp->source = bufinfo.buf;
decomp->source_limit = (byte *)bufinfo.buf + bufinfo.len;
int st;
bool is_zlib = true;
if (n_args > 1 && MP_OBJ_SMALL_INT_VALUE(args[1]) < 0) {
is_zlib = false;
}
if (is_zlib) {
st = uzlib_zlib_parse_header(decomp);
if (st < 0) {
goto error;
}
}
while (1) {
st = uzlib_uncompress_chksum(decomp);
if (st < 0) {
goto error;
}
if (st == TINF_DONE) {
break;
}
size_t offset = decomp->dest - dest_buf;
dest_buf = m_renew(byte, dest_buf, dest_buf_size, dest_buf_size + 256);
dest_buf_size += 256;
decomp->dest = dest_buf + offset;
decomp->dest_limit = decomp->dest + 256;
}
mp_uint_t final_sz = decomp->dest - dest_buf;
DEBUG_printf("uzlib: Resizing from " UINT_FMT " to final size: " UINT_FMT " bytes\n", dest_buf_size, final_sz);
dest_buf = (byte *)m_renew(byte, dest_buf, dest_buf_size, final_sz);
mp_obj_t res = mp_obj_new_bytearray_by_ref(final_sz, dest_buf);
m_del_obj(TINF_DATA, decomp);
return res;
error:
mp_raise_type_arg(&mp_type_ValueError, MP_OBJ_NEW_SMALL_INT(st));
}
STATIC MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mod_uzlib_decompress_obj, 1, 3, mod_uzlib_decompress);
#if !MICROPY_ENABLE_DYNRUNTIME
STATIC const mp_rom_map_elem_t mp_module_uzlib_globals_table[] = {
{ MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_uzlib) },
{ MP_ROM_QSTR(MP_QSTR_decompress), MP_ROM_PTR(&mod_uzlib_decompress_obj) },
{ MP_ROM_QSTR(MP_QSTR_DecompIO), MP_ROM_PTR(&decompio_type) },
};
STATIC MP_DEFINE_CONST_DICT(mp_module_uzlib_globals, mp_module_uzlib_globals_table);
const mp_obj_module_t mp_module_uzlib = {
.base = { &mp_type_module },
.globals = (mp_obj_dict_t *)&mp_module_uzlib_globals,
};
MP_REGISTER_MODULE(MP_QSTR_uzlib, mp_module_uzlib);
#endif
// Source files #include'd here to make sure they're compiled in
// only if module is enabled by config setting.
#include "lib/uzlib/tinflate.c"
#include "lib/uzlib/tinfzlib.c"
#include "lib/uzlib/tinfgzip.c"
#include "lib/uzlib/adler32.c"
#include "lib/uzlib/crc32.c"
#endif // MICROPY_PY_UZLIB
|
