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
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
|
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "https://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" lang="en-US">
<head>
<meta http-equiv="Content-Type" content="text/xhtml;charset=UTF-8"/>
<meta http-equiv="X-UA-Compatible" content="IE=11"/>
<meta name="generator" content="Doxygen 1.9.7"/>
<meta name="viewport" content="width=device-width, initial-scale=1"/>
<title>liblzma (XZ Utils): lzma/lzma12.h File Reference</title>
<link href="tabs.css" rel="stylesheet" type="text/css"/>
<link href="doxygen.css" rel="stylesheet" type="text/css" />
</head>
<body>
<div id="top"><!-- do not remove this div, it is closed by doxygen! -->
<div id="titlearea">
<table cellspacing="0" cellpadding="0">
<tbody>
<tr id="projectrow">
<td id="projectlogo"><img alt="Logo" src="xz-logo.png"/></td>
<td id="projectalign">
<div id="projectname">liblzma (XZ Utils)<span id="projectnumber"> 5.6.0</span>
</div>
</td>
</tr>
</tbody>
</table>
</div>
<!-- end header part -->
<!-- Generated by Doxygen 1.9.7 -->
<div id="navrow1" class="tabs">
<ul class="tablist">
<li><a href="index.html"><span>Main Page</span></a></li>
<li><a href="annotated.html"><span>Data Structures</span></a></li>
<li class="current"><a href="files.html"><span>Files</span></a></li>
</ul>
</div>
<div id="navrow2" class="tabs2">
<ul class="tablist">
<li><a href="files.html"><span>File List</span></a></li>
<li><a href="globals.html"><span>Globals</span></a></li>
</ul>
</div>
<div id="nav-path" class="navpath">
<ul>
<li class="navelem"><a class="el" href="dir_b17a1d403082bd69a703ed987cf158fb.html">lzma</a></li> </ul>
</div>
</div><!-- top -->
<div class="header">
<div class="summary">
<a href="#nested-classes">Data Structures</a> |
<a href="#define-members">Macros</a> |
<a href="#enum-members">Enumerations</a> |
<a href="#func-members">Functions</a> </div>
<div class="headertitle"><div class="title">lzma12.h File Reference</div></div>
</div><!--header-->
<div class="contents">
<p>LZMA1 and LZMA2 filters.
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="nested-classes" name="nested-classes"></a>
Data Structures</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">struct  </td><td class="memItemRight" valign="bottom"><a class="el" href="structlzma__options__lzma.html">lzma_options_lzma</a></td></tr>
<tr class="memdesc:"><td class="mdescLeft"> </td><td class="mdescRight">Options specific to the LZMA1 and LZMA2 filters. <a href="structlzma__options__lzma.html#details">More...</a><br /></td></tr>
<tr class="separator:"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="define-members" name="define-members"></a>
Macros</h2></td></tr>
<tr class="memitem:accedd16abcb758e7f748bac1102abda9"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="lzma12_8h.html#accedd16abcb758e7f748bac1102abda9">LZMA_FILTER_LZMA1</a>   <a class="el" href="vli_8h.html#a2d8bf5322898bfa11945848420585881">LZMA_VLI_C</a>(0x4000000000000001)</td></tr>
<tr class="memdesc:accedd16abcb758e7f748bac1102abda9"><td class="mdescLeft"> </td><td class="mdescRight">LZMA1 Filter ID (for raw encoder/decoder only, not in .xz) <br /></td></tr>
<tr class="separator:accedd16abcb758e7f748bac1102abda9"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a98a7fd42aa78a273a6b138629e46772d"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="lzma12_8h.html#a98a7fd42aa78a273a6b138629e46772d">LZMA_FILTER_LZMA1EXT</a>   <a class="el" href="vli_8h.html#a2d8bf5322898bfa11945848420585881">LZMA_VLI_C</a>(0x4000000000000002)</td></tr>
<tr class="memdesc:a98a7fd42aa78a273a6b138629e46772d"><td class="mdescLeft"> </td><td class="mdescRight">LZMA1 Filter ID with extended options (for raw encoder/decoder) <br /></td></tr>
<tr class="separator:a98a7fd42aa78a273a6b138629e46772d"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a04f9d9a018a47cc99491e6e94e92f96b"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="lzma12_8h.html#a04f9d9a018a47cc99491e6e94e92f96b">LZMA_FILTER_LZMA2</a>   <a class="el" href="vli_8h.html#a2d8bf5322898bfa11945848420585881">LZMA_VLI_C</a>(0x21)</td></tr>
<tr class="memdesc:a04f9d9a018a47cc99491e6e94e92f96b"><td class="mdescLeft"> </td><td class="mdescRight">LZMA2 Filter ID. <br /></td></tr>
<tr class="separator:a04f9d9a018a47cc99491e6e94e92f96b"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a221f69f8a1f604c1aa5d79ae8afec1e0"><td class="memItemLeft" align="right" valign="top"><a id="a221f69f8a1f604c1aa5d79ae8afec1e0" name="a221f69f8a1f604c1aa5d79ae8afec1e0"></a>
#define </td><td class="memItemRight" valign="bottom"><b>LZMA_DICT_SIZE_MIN</b>   UINT32_C(4096)</td></tr>
<tr class="separator:a221f69f8a1f604c1aa5d79ae8afec1e0"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:abadf9a9599c106a1381756219c16f8ee"><td class="memItemLeft" align="right" valign="top"><a id="abadf9a9599c106a1381756219c16f8ee" name="abadf9a9599c106a1381756219c16f8ee"></a>
#define </td><td class="memItemRight" valign="bottom"><b>LZMA_DICT_SIZE_DEFAULT</b>   (UINT32_C(1) << 23)</td></tr>
<tr class="separator:abadf9a9599c106a1381756219c16f8ee"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a36552f4d49390d060692424817222d9c"><td class="memItemLeft" align="right" valign="top"><a id="a36552f4d49390d060692424817222d9c" name="a36552f4d49390d060692424817222d9c"></a>
#define </td><td class="memItemRight" valign="bottom"><b>LZMA_LCLP_MIN</b>   0</td></tr>
<tr class="separator:a36552f4d49390d060692424817222d9c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a6890226055b5069e83835af1fb804654"><td class="memItemLeft" align="right" valign="top"><a id="a6890226055b5069e83835af1fb804654" name="a6890226055b5069e83835af1fb804654"></a>
#define </td><td class="memItemRight" valign="bottom"><b>LZMA_LCLP_MAX</b>   4</td></tr>
<tr class="separator:a6890226055b5069e83835af1fb804654"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:af3769f40103ec40516e1235c4b912d05"><td class="memItemLeft" align="right" valign="top"><a id="af3769f40103ec40516e1235c4b912d05" name="af3769f40103ec40516e1235c4b912d05"></a>
#define </td><td class="memItemRight" valign="bottom"><b>LZMA_LC_DEFAULT</b>   3</td></tr>
<tr class="separator:af3769f40103ec40516e1235c4b912d05"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:afa8ed908b2c1a88f3a76c47610036e68"><td class="memItemLeft" align="right" valign="top"><a id="afa8ed908b2c1a88f3a76c47610036e68" name="afa8ed908b2c1a88f3a76c47610036e68"></a>
#define </td><td class="memItemRight" valign="bottom"><b>LZMA_LP_DEFAULT</b>   0</td></tr>
<tr class="separator:afa8ed908b2c1a88f3a76c47610036e68"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a11ed595416a499021cd571f08bbd38bc"><td class="memItemLeft" align="right" valign="top"><a id="a11ed595416a499021cd571f08bbd38bc" name="a11ed595416a499021cd571f08bbd38bc"></a>
#define </td><td class="memItemRight" valign="bottom"><b>LZMA_PB_MIN</b>   0</td></tr>
<tr class="separator:a11ed595416a499021cd571f08bbd38bc"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5e2661cef9dbcbb309239ec243a7c034"><td class="memItemLeft" align="right" valign="top"><a id="a5e2661cef9dbcbb309239ec243a7c034" name="a5e2661cef9dbcbb309239ec243a7c034"></a>
#define </td><td class="memItemRight" valign="bottom"><b>LZMA_PB_MAX</b>   4</td></tr>
<tr class="separator:a5e2661cef9dbcbb309239ec243a7c034"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a5072e13ce7b6abcdffdf6456da5959a1"><td class="memItemLeft" align="right" valign="top"><a id="a5072e13ce7b6abcdffdf6456da5959a1" name="a5072e13ce7b6abcdffdf6456da5959a1"></a>
#define </td><td class="memItemRight" valign="bottom"><b>LZMA_PB_DEFAULT</b>   2</td></tr>
<tr class="separator:a5072e13ce7b6abcdffdf6456da5959a1"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad088307349f27b38fda0d1f21588adc9"><td class="memItemLeft" align="right" valign="top"><a id="ad088307349f27b38fda0d1f21588adc9" name="ad088307349f27b38fda0d1f21588adc9"></a>
#define </td><td class="memItemRight" valign="bottom"><b>LZMA_LZMA1EXT_ALLOW_EOPM</b>   UINT32_C(0x01)</td></tr>
<tr class="separator:ad088307349f27b38fda0d1f21588adc9"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a73ed0293db4e59d73a702d66fef537c3"><td class="memItemLeft" align="right" valign="top">#define </td><td class="memItemRight" valign="bottom"><a class="el" href="lzma12_8h.html#a73ed0293db4e59d73a702d66fef537c3">lzma_set_ext_size</a>(opt_lzma2, u64size)</td></tr>
<tr class="memdesc:a73ed0293db4e59d73a702d66fef537c3"><td class="mdescLeft"> </td><td class="mdescRight">Macro to set the 64-bit uncompressed size in ext_size_*. <br /></td></tr>
<tr class="separator:a73ed0293db4e59d73a702d66fef537c3"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="enum-members" name="enum-members"></a>
Enumerations</h2></td></tr>
<tr class="memitem:acf740075f86fa61dc408d6d0dbf8fa80"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="lzma12_8h.html#acf740075f86fa61dc408d6d0dbf8fa80">lzma_match_finder</a> { <br />
  <a class="el" href="lzma12_8h.html#acf740075f86fa61dc408d6d0dbf8fa80a6eb38f634021a192cada8a978b5de93b">LZMA_MF_HC3</a> = 0x03
, <a class="el" href="lzma12_8h.html#acf740075f86fa61dc408d6d0dbf8fa80a0944620f4949289c2ebde613cae12b04">LZMA_MF_HC4</a> = 0x04
, <a class="el" href="lzma12_8h.html#acf740075f86fa61dc408d6d0dbf8fa80a7ab212446c3f6520f5c33ccfa4b3386a">LZMA_MF_BT2</a> = 0x12
, <a class="el" href="lzma12_8h.html#acf740075f86fa61dc408d6d0dbf8fa80a983ecc59bf3e07a7c43fea551ea11865">LZMA_MF_BT3</a> = 0x13
, <br />
  <a class="el" href="lzma12_8h.html#acf740075f86fa61dc408d6d0dbf8fa80a468c32cdea9861d1ff98478364e6c547">LZMA_MF_BT4</a> = 0x14
<br />
}</td></tr>
<tr class="memdesc:acf740075f86fa61dc408d6d0dbf8fa80"><td class="mdescLeft"> </td><td class="mdescRight">Match finders. <a href="lzma12_8h.html#acf740075f86fa61dc408d6d0dbf8fa80">More...</a><br /></td></tr>
<tr class="separator:acf740075f86fa61dc408d6d0dbf8fa80"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a1032316e3075c2c8086fb17104b91866"><td class="memItemLeft" align="right" valign="top">enum  </td><td class="memItemRight" valign="bottom"><a class="el" href="lzma12_8h.html#a1032316e3075c2c8086fb17104b91866">lzma_mode</a> { <a class="el" href="lzma12_8h.html#a1032316e3075c2c8086fb17104b91866ac8c0926a91b4f756e11121efd30648cc">LZMA_MODE_FAST</a> = 1
, <a class="el" href="lzma12_8h.html#a1032316e3075c2c8086fb17104b91866ad37225f30d5cd21fc8bb3eaba283bbf9">LZMA_MODE_NORMAL</a> = 2
}</td></tr>
<tr class="memdesc:a1032316e3075c2c8086fb17104b91866"><td class="mdescLeft"> </td><td class="mdescRight">Compression modes. <a href="lzma12_8h.html#a1032316e3075c2c8086fb17104b91866">More...</a><br /></td></tr>
<tr class="separator:a1032316e3075c2c8086fb17104b91866"><td class="memSeparator" colspan="2"> </td></tr>
</table><table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="func-members" name="func-members"></a>
Functions</h2></td></tr>
<tr class="memitem:aefba1f7214ddcf8cd408a0702e8642b5"><td class="memItemLeft" align="right" valign="top"><a class="el" href="base_8h.html#abbc819c74b484c846825ae1388a50a59">lzma_bool</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="lzma12_8h.html#aefba1f7214ddcf8cd408a0702e8642b5">lzma_mf_is_supported</a> (<a class="el" href="lzma12_8h.html#acf740075f86fa61dc408d6d0dbf8fa80">lzma_match_finder</a> match_finder) lzma_nothrow lzma_attr_const</td></tr>
<tr class="memdesc:aefba1f7214ddcf8cd408a0702e8642b5"><td class="mdescLeft"> </td><td class="mdescRight">Test if given match finder is supported. <br /></td></tr>
<tr class="separator:aefba1f7214ddcf8cd408a0702e8642b5"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad1add1c2600fdbb3d737e4fb3465dfcb"><td class="memItemLeft" align="right" valign="top"><a class="el" href="base_8h.html#abbc819c74b484c846825ae1388a50a59">lzma_bool</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="lzma12_8h.html#ad1add1c2600fdbb3d737e4fb3465dfcb">lzma_mode_is_supported</a> (<a class="el" href="lzma12_8h.html#a1032316e3075c2c8086fb17104b91866">lzma_mode</a> mode) lzma_nothrow lzma_attr_const</td></tr>
<tr class="memdesc:ad1add1c2600fdbb3d737e4fb3465dfcb"><td class="mdescLeft"> </td><td class="mdescRight">Test if given compression mode is supported. <br /></td></tr>
<tr class="separator:ad1add1c2600fdbb3d737e4fb3465dfcb"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:aa62c28944fe3575653a4c25780400d77"><td class="memItemLeft" align="right" valign="top"><a class="el" href="base_8h.html#abbc819c74b484c846825ae1388a50a59">lzma_bool</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="lzma12_8h.html#aa62c28944fe3575653a4c25780400d77">lzma_lzma_preset</a> (<a class="el" href="structlzma__options__lzma.html">lzma_options_lzma</a> *options, uint32_t preset) lzma_nothrow</td></tr>
<tr class="memdesc:aa62c28944fe3575653a4c25780400d77"><td class="mdescLeft"> </td><td class="mdescRight">Set a compression preset to <a class="el" href="structlzma__options__lzma.html" title="Options specific to the LZMA1 and LZMA2 filters.">lzma_options_lzma</a> structure. <br /></td></tr>
<tr class="separator:aa62c28944fe3575653a4c25780400d77"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>LZMA1 and LZMA2 filters. </p>
<dl class="section note"><dt>Note</dt><dd>Never include this file directly. Use <<a class="el" href="lzma_8h.html" title="The public API of liblzma data compression library.">lzma.h</a>> instead. </dd></dl>
</div><h2 class="groupheader">Macro Definition Documentation</h2>
<a id="accedd16abcb758e7f748bac1102abda9" name="accedd16abcb758e7f748bac1102abda9"></a>
<h2 class="memtitle"><span class="permalink"><a href="#accedd16abcb758e7f748bac1102abda9">◆ </a></span>LZMA_FILTER_LZMA1</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">#define LZMA_FILTER_LZMA1   <a class="el" href="vli_8h.html#a2d8bf5322898bfa11945848420585881">LZMA_VLI_C</a>(0x4000000000000001)</td>
</tr>
</table>
</div><div class="memdoc">
<p>LZMA1 Filter ID (for raw encoder/decoder only, not in .xz) </p>
<p>LZMA1 is the very same thing as what was called just LZMA in LZMA Utils, 7-Zip, and LZMA SDK. It's called LZMA1 here to prevent developers from accidentally using LZMA when they actually want LZMA2. </p>
</div>
</div>
<a id="a98a7fd42aa78a273a6b138629e46772d" name="a98a7fd42aa78a273a6b138629e46772d"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a98a7fd42aa78a273a6b138629e46772d">◆ </a></span>LZMA_FILTER_LZMA1EXT</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">#define LZMA_FILTER_LZMA1EXT   <a class="el" href="vli_8h.html#a2d8bf5322898bfa11945848420585881">LZMA_VLI_C</a>(0x4000000000000002)</td>
</tr>
</table>
</div><div class="memdoc">
<p>LZMA1 Filter ID with extended options (for raw encoder/decoder) </p>
<p>This is like LZMA_FILTER_LZMA1 but with this ID a few extra options are supported in the <a class="el" href="structlzma__options__lzma.html" title="Options specific to the LZMA1 and LZMA2 filters.">lzma_options_lzma</a> structure:</p>
<ul>
<li>A flag to tell the encoder if the end of payload marker (EOPM) alias end of stream (EOS) marker must be written at the end of the stream. In contrast, LZMA_FILTER_LZMA1 always writes the end marker.</li>
<li>Decoder needs to be told the uncompressed size of the stream or that it is unknown (using the special value UINT64_MAX). If the size is known, a flag can be set to allow the presence of the end marker anyway. In contrast, LZMA_FILTER_LZMA1 always behaves as if the uncompressed size was unknown.</li>
</ul>
<p>This allows handling file formats where LZMA1 streams are used but where the end marker isn't allowed or where it might not (always) be present. This extended LZMA1 functionality is provided as a Filter ID for raw encoder and decoder instead of adding new encoder and decoder initialization functions because this way it is possible to also use extra filters, for example, LZMA_FILTER_X86 in a filter chain with LZMA_FILTER_LZMA1EXT, which might be needed to handle some file formats. </p>
</div>
</div>
<a id="a04f9d9a018a47cc99491e6e94e92f96b" name="a04f9d9a018a47cc99491e6e94e92f96b"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a04f9d9a018a47cc99491e6e94e92f96b">◆ </a></span>LZMA_FILTER_LZMA2</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">#define LZMA_FILTER_LZMA2   <a class="el" href="vli_8h.html#a2d8bf5322898bfa11945848420585881">LZMA_VLI_C</a>(0x21)</td>
</tr>
</table>
</div><div class="memdoc">
<p>LZMA2 Filter ID. </p>
<p>Usually you want this instead of LZMA1. Compared to LZMA1, LZMA2 adds support for LZMA_SYNC_FLUSH, uncompressed chunks (smaller expansion when trying to compress incompressible data), possibility to change lc/lp/pb in the middle of encoding, and some other internal improvements. </p>
</div>
</div>
<a id="a73ed0293db4e59d73a702d66fef537c3" name="a73ed0293db4e59d73a702d66fef537c3"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a73ed0293db4e59d73a702d66fef537c3">◆ </a></span>lzma_set_ext_size</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">#define lzma_set_ext_size</td>
<td>(</td>
<td class="paramtype"> </td>
<td class="paramname">opt_lzma2, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"> </td>
<td class="paramname">u64size </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<b>Value:</b><div class="fragment"><div class="line"><span class="keywordflow">do</span> { \</div>
<div class="line"> (opt_lzma2).ext_size_low = (uint32_t)(u64size); \</div>
<div class="line"> (opt_lzma2).ext_size_high = (uint32_t)((uint64_t)(u64size) >> 32); \</div>
<div class="line">} <span class="keywordflow">while</span> (0)</div>
</div><!-- fragment -->
<p>Macro to set the 64-bit uncompressed size in ext_size_*. </p>
<p>This might be convenient when decoding using LZMA_FILTER_LZMA1EXT. This isn't used with LZMA_FILTER_LZMA1 or LZMA_FILTER_LZMA2. </p>
</div>
</div>
<h2 class="groupheader">Enumeration Type Documentation</h2>
<a id="acf740075f86fa61dc408d6d0dbf8fa80" name="acf740075f86fa61dc408d6d0dbf8fa80"></a>
<h2 class="memtitle"><span class="permalink"><a href="#acf740075f86fa61dc408d6d0dbf8fa80">◆ </a></span>lzma_match_finder</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">enum <a class="el" href="lzma12_8h.html#acf740075f86fa61dc408d6d0dbf8fa80">lzma_match_finder</a></td>
</tr>
</table>
</div><div class="memdoc">
<p>Match finders. </p>
<p>Match finder has major effect on both speed and compression ratio. Usually hash chains are faster than binary trees.</p>
<p>If you will use LZMA_SYNC_FLUSH often, the hash chains may be a better choice, because binary trees get much higher compression ratio penalty with LZMA_SYNC_FLUSH.</p>
<p>The memory usage formulas are only rough estimates, which are closest to reality when dict_size is a power of two. The formulas are more complex in reality, and can also change a little between liblzma versions. Use <a class="el" href="filter_8h.html#a730f9391e85a5979bcd1b32643ae7176" title="Calculate approximate memory requirements for raw encoder.">lzma_raw_encoder_memusage()</a> to get more accurate estimate of memory usage. </p>
<table class="fieldtable">
<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="acf740075f86fa61dc408d6d0dbf8fa80a6eb38f634021a192cada8a978b5de93b" name="acf740075f86fa61dc408d6d0dbf8fa80a6eb38f634021a192cada8a978b5de93b"></a>LZMA_MF_HC3 </td><td class="fielddoc"><p>Hash Chain with 2- and 3-byte hashing. </p>
<p>Minimum nice_len: 3</p>
<p>Memory usage:</p><ul>
<li>dict_size <= 16 MiB: dict_size * 7.5</li>
<li>dict_size > 16 MiB: dict_size * 5.5 + 64 MiB </li>
</ul>
</td></tr>
<tr><td class="fieldname"><a id="acf740075f86fa61dc408d6d0dbf8fa80a0944620f4949289c2ebde613cae12b04" name="acf740075f86fa61dc408d6d0dbf8fa80a0944620f4949289c2ebde613cae12b04"></a>LZMA_MF_HC4 </td><td class="fielddoc"><p>Hash Chain with 2-, 3-, and 4-byte hashing. </p>
<p>Minimum nice_len: 4</p>
<p>Memory usage:</p><ul>
<li>dict_size <= 32 MiB: dict_size * 7.5</li>
<li>dict_size > 32 MiB: dict_size * 6.5 </li>
</ul>
</td></tr>
<tr><td class="fieldname"><a id="acf740075f86fa61dc408d6d0dbf8fa80a7ab212446c3f6520f5c33ccfa4b3386a" name="acf740075f86fa61dc408d6d0dbf8fa80a7ab212446c3f6520f5c33ccfa4b3386a"></a>LZMA_MF_BT2 </td><td class="fielddoc"><p>Binary Tree with 2-byte hashing. </p>
<p>Minimum nice_len: 2</p>
<p>Memory usage: dict_size * 9.5 </p>
</td></tr>
<tr><td class="fieldname"><a id="acf740075f86fa61dc408d6d0dbf8fa80a983ecc59bf3e07a7c43fea551ea11865" name="acf740075f86fa61dc408d6d0dbf8fa80a983ecc59bf3e07a7c43fea551ea11865"></a>LZMA_MF_BT3 </td><td class="fielddoc"><p>Binary Tree with 2- and 3-byte hashing. </p>
<p>Minimum nice_len: 3</p>
<p>Memory usage:</p><ul>
<li>dict_size <= 16 MiB: dict_size * 11.5</li>
<li>dict_size > 16 MiB: dict_size * 9.5 + 64 MiB </li>
</ul>
</td></tr>
<tr><td class="fieldname"><a id="acf740075f86fa61dc408d6d0dbf8fa80a468c32cdea9861d1ff98478364e6c547" name="acf740075f86fa61dc408d6d0dbf8fa80a468c32cdea9861d1ff98478364e6c547"></a>LZMA_MF_BT4 </td><td class="fielddoc"><p>Binary Tree with 2-, 3-, and 4-byte hashing. </p>
<p>Minimum nice_len: 4</p>
<p>Memory usage:</p><ul>
<li>dict_size <= 32 MiB: dict_size * 11.5</li>
<li>dict_size > 32 MiB: dict_size * 10.5 </li>
</ul>
</td></tr>
</table>
</div>
</div>
<a id="a1032316e3075c2c8086fb17104b91866" name="a1032316e3075c2c8086fb17104b91866"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a1032316e3075c2c8086fb17104b91866">◆ </a></span>lzma_mode</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">enum <a class="el" href="lzma12_8h.html#a1032316e3075c2c8086fb17104b91866">lzma_mode</a></td>
</tr>
</table>
</div><div class="memdoc">
<p>Compression modes. </p>
<p>This selects the function used to analyze the data produced by the match finder. </p>
<table class="fieldtable">
<tr><th colspan="2">Enumerator</th></tr><tr><td class="fieldname"><a id="a1032316e3075c2c8086fb17104b91866ac8c0926a91b4f756e11121efd30648cc" name="a1032316e3075c2c8086fb17104b91866ac8c0926a91b4f756e11121efd30648cc"></a>LZMA_MODE_FAST </td><td class="fielddoc"><p>Fast compression. </p>
<p>Fast mode is usually at its best when combined with a hash chain match finder. </p>
</td></tr>
<tr><td class="fieldname"><a id="a1032316e3075c2c8086fb17104b91866ad37225f30d5cd21fc8bb3eaba283bbf9" name="a1032316e3075c2c8086fb17104b91866ad37225f30d5cd21fc8bb3eaba283bbf9"></a>LZMA_MODE_NORMAL </td><td class="fielddoc"><p>Normal compression. </p>
<p>This is usually notably slower than fast mode. Use this together with binary tree match finders to expose the full potential of the LZMA1 or LZMA2 encoder. </p>
</td></tr>
</table>
</div>
</div>
<h2 class="groupheader">Function Documentation</h2>
<a id="aefba1f7214ddcf8cd408a0702e8642b5" name="aefba1f7214ddcf8cd408a0702e8642b5"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aefba1f7214ddcf8cd408a0702e8642b5">◆ </a></span>lzma_mf_is_supported()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="base_8h.html#abbc819c74b484c846825ae1388a50a59">lzma_bool</a> lzma_mf_is_supported </td>
<td>(</td>
<td class="paramtype"><a class="el" href="lzma12_8h.html#acf740075f86fa61dc408d6d0dbf8fa80">lzma_match_finder</a> </td>
<td class="paramname"><em>match_finder</em></td><td>)</td>
<td> const</td>
</tr>
</table>
</div><div class="memdoc">
<p>Test if given match finder is supported. </p>
<p>It is safe to call this with a value that isn't listed in lzma_match_finder enumeration; the return value will be false.</p>
<p>There is no way to list which match finders are available in this particular liblzma version and build. It would be useless, because a new match finder, which the application developer wasn't aware, could require giving additional options to the encoder that the older match finders don't need.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">match_finder</td><td>Match finder ID</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>lzma_bool:<ul>
<li>true if the match finder is supported by this liblzma build.</li>
<li>false otherwise. </li>
</ul>
</dd></dl>
</div>
</div>
<a id="ad1add1c2600fdbb3d737e4fb3465dfcb" name="ad1add1c2600fdbb3d737e4fb3465dfcb"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ad1add1c2600fdbb3d737e4fb3465dfcb">◆ </a></span>lzma_mode_is_supported()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="base_8h.html#abbc819c74b484c846825ae1388a50a59">lzma_bool</a> lzma_mode_is_supported </td>
<td>(</td>
<td class="paramtype"><a class="el" href="lzma12_8h.html#a1032316e3075c2c8086fb17104b91866">lzma_mode</a> </td>
<td class="paramname"><em>mode</em></td><td>)</td>
<td> const</td>
</tr>
</table>
</div><div class="memdoc">
<p>Test if given compression mode is supported. </p>
<p>It is safe to call this with a value that isn't listed in lzma_mode enumeration; the return value will be false.</p>
<p>There is no way to list which modes are available in this particular liblzma version and build. It would be useless, because a new compression mode, which the application developer wasn't aware, could require giving additional options to the encoder that the older modes don't need.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">mode</td><td>Mode ID.</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>lzma_bool:<ul>
<li>true if the compression mode is supported by this liblzma build.</li>
<li>false otherwise. </li>
</ul>
</dd></dl>
</div>
</div>
<a id="aa62c28944fe3575653a4c25780400d77" name="aa62c28944fe3575653a4c25780400d77"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aa62c28944fe3575653a4c25780400d77">◆ </a></span>lzma_lzma_preset()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="base_8h.html#abbc819c74b484c846825ae1388a50a59">lzma_bool</a> lzma_lzma_preset </td>
<td>(</td>
<td class="paramtype"><a class="el" href="structlzma__options__lzma.html">lzma_options_lzma</a> * </td>
<td class="paramname"><em>options</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">uint32_t </td>
<td class="paramname"><em>preset</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Set a compression preset to <a class="el" href="structlzma__options__lzma.html" title="Options specific to the LZMA1 and LZMA2 filters.">lzma_options_lzma</a> structure. </p>
<p>0 is the fastest and 9 is the slowest. These match the switches -0 .. -9 of the xz command line tool. In addition, it is possible to bitwise-or flags to the preset. Currently only LZMA_PRESET_EXTREME is supported. The flags are defined in <a class="el" href="container_8h.html" title="File formats.">container.h</a>, because the flags are used also with <a class="el" href="container_8h.html#acbdad999c544872f0f5d242f0d1a4ed4" title="Initialize .xz Stream encoder using a preset number.">lzma_easy_encoder()</a>.</p>
<p>The preset levels are subject to changes between liblzma versions.</p>
<p>This function is available only if LZMA1 or LZMA2 encoder has been enabled when building liblzma.</p>
<p>If features (like certain match finders) have been disabled at build time, then the function may return success (false) even though the resulting LZMA1/LZMA2 options may not be usable for encoder initialization (LZMA_OPTIONS_ERROR).</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir">[out]</td><td class="paramname">options</td><td>Pointer to LZMA1 or LZMA2 options to be filled </td></tr>
<tr><td class="paramdir"></td><td class="paramname">preset</td><td>Preset level bitwse-ORed with preset flags</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>lzma_bool:<ul>
<li>true if the preset is not supported (failure).</li>
<li>false otherwise (success). </li>
</ul>
</dd></dl>
</div>
</div>
</div><!-- contents -->
<hr class="footer"/>
<p style="text-align: right;padding-right: 12px;">
XZ logo © 2023 by Jia Tan is licensed under
<a href="COPYING.CC-BY-SA-4.0"
rel="license"
style="display:inline-block;">
CC BY-SA 4.0
</a>
</p>
</body>
</html>
|
