FilesExpand file tree

 main

/

moduzlib.c

Copy path

Blame

More file actions

Blame

More file actions

Latest commit

 

History

History

History

218 lines (185 loc) · 6.56 KB

 main

/

moduzlib.c

Copy path

Top

File metadata and controls

• Code
• Blame

218 lines (185 loc) · 6.56 KB

Raw

Copy raw file

Download raw file

Open symbols panel

Edit and raw actions

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

// Copyright (c) 2014-2016 Paul Sokolovsky

// SPDX-FileCopyrightText: 2014 MicroPython & CircuitPython contributors (https://github.com/adafruit/circuitpython/graphs/contributors)

//

// SPDX-License-Identifier: MIT

#include <stdio.h>

#include <string.h>

#include "py/runtime.h"

#include "py/stream.h"

#include "py/mperrno.h"

#include "supervisor/shared/translate/translate.h"

#if MICROPY_PY_UZLIB

#define UZLIB_CONF_PARANOID_CHECKS (1)

#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_raise(self->src_stream, MP_STREAM_OP_READ);

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 = m_new_obj(mp_obj_decompio_t);

o->base.type = 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;

int 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"));

}

dict_sz = 1 << dict_opt;

} 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 = (unsigned char *)buf + size;

int st = uzlib_uncompress_chksum(&o->decomp);

if (st == TINF_DONE) {

o->eof = true;

}

if (st < 0) {

*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

#if !MICROPY_ENABLE_DYNRUNTIME

STATIC const mp_stream_p_t decompio_stream_p = {

MP_PROTO_IMPLEMENT(MP_QSTR_protocol_stream)

.read = decompio_read,

};

STATIC const mp_obj_type_t decompio_type = {

{ &mp_type_type },

.flags = MP_TYPE_FLAG_EXTENDED,

.name = MP_QSTR_DecompIO,

.make_new = decompio_make_new,

.locals_dict = (void *)&decompio_locals_dict,

MP_TYPE_EXTENDED_FIELDS(

.protocol = &decompio_stream_p,

),

};

#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", decomp->destSize);

decomp->source = bufinfo.buf;

decomp->source_limit = (unsigned char *)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 = dest_buf + offset + 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,

};

#endif

// Source files #include'd here to make sure they're compiled in

// only if module is enabled by config setting.

#pragma GCC diagnostic ignored "-Wsign-compare"

#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