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
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
|
/* xdelta3 - delta compression tools and library
Copyright 2016 Joshua MacDonald
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at
http://www.apache.org/licenses/LICENSE-2.0
Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/
#ifndef XDELTA3_INTERNAL_H__
#define XDELTA3_INTERNAL_H__
#include "xdelta3.h"
typedef struct _main_file main_file;
typedef struct _main_extcomp main_extcomp;
void main_buffree (void *ptr);
void* main_bufalloc (size_t size);
void main_file_init (main_file *xfile);
int main_file_close (main_file *xfile);
void main_file_cleanup (main_file *xfile);
int main_file_isopen (main_file *xfile);
int main_file_open (main_file *xfile, const char* name, int mode);
int main_file_exists (main_file *xfile);
int main_file_stat (main_file *xfile, xoff_t *size);
int xd3_whole_append_window (xd3_stream *stream);
int xd3_main_cmdline (int argc, char **argv);
int main_file_read (main_file *ifile,
uint8_t *buf,
size_t size,
size_t *nread,
const char *msg);
int main_file_write (main_file *ofile, uint8_t *buf,
usize_t size, const char *msg);
void* main_malloc (size_t size);
void main_free (void *ptr);
int test_compare_files (const char* f0, const char* f1);
usize_t xd3_bytes_on_srcblk (xd3_source *src, xoff_t blkno);
xoff_t xd3_source_eof(const xd3_source *src);
uint32_t xd3_large_cksum_update (uint32_t cksum,
const uint8_t *base,
usize_t look);
int xd3_emit_byte (xd3_stream *stream,
xd3_output **outputp,
uint8_t code);
int xd3_emit_bytes (xd3_stream *stream,
xd3_output **outputp,
const uint8_t *base,
usize_t size);
xd3_output* xd3_alloc_output (xd3_stream *stream,
xd3_output *old_output);
int xd3_encode_init_full (xd3_stream *stream);
usize_t xd3_pow2_roundup (usize_t x);
long get_millisecs_now (void);
int xd3_process_stream (int is_encode,
xd3_stream *stream,
int (*func) (xd3_stream *),
int close_stream,
const uint8_t *input,
usize_t input_size,
uint8_t *output,
usize_t *output_size,
usize_t output_size_max);
#if PYTHON_MODULE || SWIG_MODULE || NOT_MAIN
int xd3_main_cmdline (int argc, char **argv);
#endif
#if REGRESSION_TEST
int xd3_selftest (void);
#endif
/* main_file->mode values */
typedef enum
{
XO_READ = 0,
XO_WRITE = 1
} main_file_modes;
#ifndef XD3_POSIX
#define XD3_POSIX 0
#endif
#ifndef XD3_STDIO
#define XD3_STDIO 0
#endif
#ifndef XD3_WIN32
#define XD3_WIN32 0
#endif
#ifndef NOT_MAIN
#define NOT_MAIN 0
#endif
/* If none are set, default to posix. */
#if (XD3_POSIX + XD3_STDIO + XD3_WIN32) == 0
#undef XD3_POSIX
#define XD3_POSIX 1
#endif
struct _main_file
{
#if XD3_WIN32
HANDLE file;
#elif XD3_STDIO
FILE *file;
#elif XD3_POSIX
int file;
#endif
int mode; /* XO_READ and XO_WRITE */
const char *filename; /* File name or /dev/stdin,
* /dev/stdout, /dev/stderr. */
char *filename_copy; /* File name or /dev/stdin,
* /dev/stdout, /dev/stderr. */
const char *realname; /* File name or /dev/stdin,
* /dev/stdout, /dev/stderr. */
const main_extcomp *compressor; /* External compression struct. */
int flags; /* RD_FIRST, RD_NONEXTERNAL, ... */
xoff_t nread; /* for input position */
xoff_t nwrite; /* for output position */
uint8_t *snprintf_buf; /* internal snprintf() use */
int size_known; /* Set by main_set_souze */
xoff_t source_position; /* for avoiding seek in getblk_func */
int seek_failed; /* after seek fails once, try FIFO */
};
#ifndef UINT32_MAX
#define UINT32_MAX 4294967295U
#endif
#ifndef UINT64_MAX
#define UINT64_MAX 18446744073709551615ULL
#endif
#define UINT32_OFLOW_MASK 0xfe000000U
#define UINT64_OFLOW_MASK 0xfe00000000000000ULL
/*********************************************************************
Integer encoder/decoder functions
**********************************************************************/
/* Consume N bytes of input, only used by the decoder. */
#define DECODE_INPUT(n) \
do { \
stream->total_in += (xoff_t) (n); \
stream->avail_in -= (n); \
stream->next_in += (n); \
} while (0)
#define DECODE_INTEGER_TYPE(PART,OFLOW) \
while (stream->avail_in != 0) \
{ \
usize_t next = stream->next_in[0]; \
\
DECODE_INPUT(1); \
\
if (PART & OFLOW) \
{ \
stream->msg = "overflow in decode_integer"; \
return XD3_INVALID_INPUT; \
} \
\
PART = (PART << 7) | (next & 127); \
\
if ((next & 128) == 0) \
{ \
(*val) = PART; \
PART = 0; \
return 0; \
} \
} \
\
stream->msg = "further input required"; \
return XD3_INPUT
#define READ_INTEGER_TYPE(TYPE, OFLOW) \
TYPE val = 0; \
const uint8_t *inp = (*inpp); \
usize_t next; \
\
do \
{ \
if (inp == maxp) \
{ \
stream->msg = "end-of-input in read_integer"; \
return XD3_INVALID_INPUT; \
} \
\
if (val & OFLOW) \
{ \
stream->msg = "overflow in read_intger"; \
return XD3_INVALID_INPUT; \
} \
\
next = (*inp++); \
val = (val << 7) | (next & 127); \
} \
while (next & 128); \
\
(*valp) = val; \
(*inpp) = inp; \
\
return 0
#define EMIT_INTEGER_TYPE() \
/* max 64-bit value in base-7 encoding is 9.1 bytes */ \
uint8_t buf[10]; \
usize_t bufi = 10; \
\
/* This loop performs division and turns on all MSBs. */ \
do \
{ \
buf[--bufi] = (num & 127) | 128; \
num >>= 7U; \
} \
while (num != 0); \
\
/* Turn off MSB of the last byte. */ \
buf[9] &= 127; \
\
return xd3_emit_bytes (stream, output, buf + bufi, 10 - bufi)
#define IF_SIZEOF32(x) if (num < (1U << (7 * (x)))) return (x);
#define IF_SIZEOF64(x) if (num < (1ULL << (7 * (x)))) return (x);
#if USE_UINT32
static inline uint32_t
xd3_sizeof_uint32_t (uint32_t num)
{
IF_SIZEOF32(1);
IF_SIZEOF32(2);
IF_SIZEOF32(3);
IF_SIZEOF32(4);
return 5;
}
static inline int
xd3_decode_uint32_t (xd3_stream *stream, uint32_t *val)
{ DECODE_INTEGER_TYPE (stream->dec_32part, UINT32_OFLOW_MASK); }
static inline int
xd3_read_uint32_t (xd3_stream *stream, const uint8_t **inpp,
const uint8_t *maxp, uint32_t *valp)
{ READ_INTEGER_TYPE (uint32_t, UINT32_OFLOW_MASK); }
#if XD3_ENCODER
static inline int
xd3_emit_uint32_t (xd3_stream *stream, xd3_output **output, uint32_t num)
{ EMIT_INTEGER_TYPE (); }
#endif /* XD3_ENCODER */
#endif /* USE_UINT32 */
#if USE_UINT64
static inline uint32_t
xd3_sizeof_uint64_t (uint64_t num)
{
IF_SIZEOF64(1);
IF_SIZEOF64(2);
IF_SIZEOF64(3);
IF_SIZEOF64(4);
IF_SIZEOF64(5);
IF_SIZEOF64(6);
IF_SIZEOF64(7);
IF_SIZEOF64(8);
IF_SIZEOF64(9);
return 10;
}
static inline int
xd3_decode_uint64_t (xd3_stream *stream, uint64_t *val)
{ DECODE_INTEGER_TYPE (stream->dec_64part, UINT64_OFLOW_MASK); }
static inline int
xd3_read_uint64_t (xd3_stream *stream, const uint8_t **inpp,
const uint8_t *maxp, uint64_t *valp)
{ READ_INTEGER_TYPE (uint64_t, UINT64_OFLOW_MASK); }
#if XD3_ENCODER
static inline int
xd3_emit_uint64_t (xd3_stream *stream, xd3_output **output, uint64_t num)
{ EMIT_INTEGER_TYPE (); }
#endif /* XD3_ENCODER */
#endif /* USE_UINT64 */
#if SIZEOF_USIZE_T == 4
#define USIZE_T_MAX UINT32_MAX
#define USIZE_T_MAXBLKSZ 0x80000000U
#define XD3_MAXSRCWINSZ (1ULL << 31)
#define xd3_large_cksum xd3_large32_cksum
#define xd3_large_cksum_update xd3_large32_cksum_update
#define xd3_hash_multiplier xd3_hash_multiplier32
static inline uint32_t xd3_sizeof_size (usize_t num)
{ return xd3_sizeof_uint32_t (num); }
static inline int xd3_decode_size (xd3_stream *stream, usize_t *valp)
{ return xd3_decode_uint32_t (stream, (uint32_t*) valp); }
static inline int xd3_read_size (xd3_stream *stream, const uint8_t **inpp,
const uint8_t *maxp, usize_t *valp)
{ return xd3_read_uint32_t (stream, inpp, maxp, (uint32_t*) valp); }
#if XD3_ENCODER
static inline int xd3_emit_size (xd3_stream *stream, xd3_output **output, usize_t num)
{ return xd3_emit_uint32_t (stream, output, num); }
#endif
#elif SIZEOF_USIZE_T == 8
#define USIZE_T_MAX UINT64_MAX
#define USIZE_T_MAXBLKSZ 0x8000000000000000ULL
#define XD3_MAXSRCWINSZ (1ULL << 61)
#define xd3_large_cksum xd3_large64_cksum
#define xd3_large_cksum_update xd3_large64_cksum_update
#define xd3_hash_multiplier xd3_hash_multiplier64
static inline uint32_t xd3_sizeof_size (usize_t num)
{ return xd3_sizeof_uint64_t (num); }
static inline int xd3_decode_size (xd3_stream *stream, usize_t *valp)
{ return xd3_decode_uint64_t (stream, (uint64_t*) valp); }
static inline int xd3_read_size (xd3_stream *stream, const uint8_t **inpp,
const uint8_t *maxp, usize_t *valp)
{ return xd3_read_uint64_t (stream, inpp, maxp, (uint64_t*) valp); }
#if XD3_ENCODER
static inline int xd3_emit_size (xd3_stream *stream, xd3_output **output, usize_t num)
{ return xd3_emit_uint64_t (stream, output, num); }
#endif
#endif /* SIZEOF_USIZE_T */
#if SIZEOF_XOFF_T == 4
#define XOFF_T_MAX UINT32_MAX
static inline int xd3_decode_offset (xd3_stream *stream, xoff_t *valp)
{ return xd3_decode_uint32_t (stream, (uint32_t*) valp); }
#if XD3_ENCODER
static inline int xd3_emit_offset (xd3_stream *stream, xd3_output **output, xoff_t num)
{ return xd3_emit_uint32_t (stream, output, num); }
#endif
#elif SIZEOF_XOFF_T == 8
#define XOFF_T_MAX UINT64_MAX
static inline int xd3_decode_offset (xd3_stream *stream, xoff_t *valp)
{ return xd3_decode_uint64_t (stream, (uint64_t*) valp); }
#if XD3_ENCODER
static inline int xd3_emit_offset (xd3_stream *stream, xd3_output **output, xoff_t num)
{ return xd3_emit_uint64_t (stream, output, num); }
#endif
#endif
#define USIZE_T_OVERFLOW(a,b) ((USIZE_T_MAX - (usize_t) (a)) < (usize_t) (b))
#define XOFF_T_OVERFLOW(a,b) ((XOFF_T_MAX - (xoff_t) (a)) < (xoff_t) (b))
int xd3_size_hashtable (xd3_stream *stream,
usize_t slots,
usize_t look,
xd3_hash_cfg *cfg);
usize_t xd3_checksum_hash (const xd3_hash_cfg *cfg, const usize_t cksum);
#if USE_UINT32
uint32_t xd3_large32_cksum (xd3_hash_cfg *cfg, const uint8_t *base, const usize_t look);
uint32_t xd3_large32_cksum_update (xd3_hash_cfg *cfg, const uint32_t cksum,
const uint8_t *base, const usize_t look);
#endif /* USE_UINT32 */
#if USE_UINT64
uint64_t xd3_large64_cksum (xd3_hash_cfg *cfg, const uint8_t *base, const usize_t look);
uint64_t xd3_large64_cksum_update (xd3_hash_cfg *cfg, const uint64_t cksum,
const uint8_t *base, const usize_t look);
#endif /* USE_UINT64 */
#define MAX_LRU_SIZE 32U
#define XD3_MINSRCWINSZ (XD3_ALLOCSIZE * MAX_LRU_SIZE)
#endif // XDELTA3_INTERNAL_H__
|
