File size: 18,778 Bytes
288007d |
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 |
<!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/index_hash.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="projectalign">
<div id="projectname">liblzma (XZ Utils)<span id="projectnumber"> 5.4.6</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="#typedef-members">Typedefs</a> |
<a href="#func-members">Functions</a> </div>
<div class="headertitle"><div class="title">index_hash.h File Reference</div></div>
</div><!--header-->
<div class="contents">
<p>Validate Index by using a hash function.
<a href="#details">More...</a></p>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="typedef-members" name="typedef-members"></a>
Typedefs</h2></td></tr>
<tr class="memitem:a2db9f438838c8ff72a8a6fd3fc856f8c"><td class="memItemLeft" align="right" valign="top"><a id="a2db9f438838c8ff72a8a6fd3fc856f8c" name="a2db9f438838c8ff72a8a6fd3fc856f8c"></a>
typedef struct lzma_index_hash_s </td><td class="memItemRight" valign="bottom"><b>lzma_index_hash</b></td></tr>
<tr class="memdesc:a2db9f438838c8ff72a8a6fd3fc856f8c"><td class="mdescLeft"> </td><td class="mdescRight">Opaque data type to hold the Index hash. <br /></td></tr>
<tr class="separator:a2db9f438838c8ff72a8a6fd3fc856f8c"><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:aaafae4967a4a266d97dc34a98bfcabfb"><td class="memItemLeft" align="right" valign="top"><a class="el" href="index__hash_8h.html#a2db9f438838c8ff72a8a6fd3fc856f8c">lzma_index_hash</a> * </td><td class="memItemRight" valign="bottom"><a class="el" href="index__hash_8h.html#aaafae4967a4a266d97dc34a98bfcabfb">lzma_index_hash_init</a> (<a class="el" href="index__hash_8h.html#a2db9f438838c8ff72a8a6fd3fc856f8c">lzma_index_hash</a> *index_hash, const <a class="el" href="structlzma__allocator.html">lzma_allocator</a> *allocator) lzma_nothrow lzma_attr_warn_unused_result</td></tr>
<tr class="memdesc:aaafae4967a4a266d97dc34a98bfcabfb"><td class="mdescLeft"> </td><td class="mdescRight">Allocate and initialize a new lzma_index_hash structure. <br /></td></tr>
<tr class="separator:aaafae4967a4a266d97dc34a98bfcabfb"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a7dacb41b9ec1c8df5d33dfdae97743b3"><td class="memItemLeft" align="right" valign="top">void </td><td class="memItemRight" valign="bottom"><a class="el" href="index__hash_8h.html#a7dacb41b9ec1c8df5d33dfdae97743b3">lzma_index_hash_end</a> (<a class="el" href="index__hash_8h.html#a2db9f438838c8ff72a8a6fd3fc856f8c">lzma_index_hash</a> *index_hash, const <a class="el" href="structlzma__allocator.html">lzma_allocator</a> *allocator) lzma_nothrow</td></tr>
<tr class="memdesc:a7dacb41b9ec1c8df5d33dfdae97743b3"><td class="mdescLeft"> </td><td class="mdescRight">Deallocate lzma_index_hash structure. <br /></td></tr>
<tr class="separator:a7dacb41b9ec1c8df5d33dfdae97743b3"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a2bdbe4f0b5fa2fadb7528447feaaa97f"><td class="memItemLeft" align="right" valign="top"><a class="el" href="base_8h.html#a8494e0457e1463d6d2b6836018d87b6e">lzma_ret</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="index__hash_8h.html#a2bdbe4f0b5fa2fadb7528447feaaa97f">lzma_index_hash_append</a> (<a class="el" href="index__hash_8h.html#a2db9f438838c8ff72a8a6fd3fc856f8c">lzma_index_hash</a> *index_hash, <a class="el" href="vli_8h.html#a1dbc0ffc3e72748f64df8f7f71898272">lzma_vli</a> unpadded_size, <a class="el" href="vli_8h.html#a1dbc0ffc3e72748f64df8f7f71898272">lzma_vli</a> uncompressed_size) lzma_nothrow lzma_attr_warn_unused_result</td></tr>
<tr class="memdesc:a2bdbe4f0b5fa2fadb7528447feaaa97f"><td class="mdescLeft"> </td><td class="mdescRight">Add a new Record to an Index hash. <br /></td></tr>
<tr class="separator:a2bdbe4f0b5fa2fadb7528447feaaa97f"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a891eb955284c9117155f92eb0ddba44c"><td class="memItemLeft" align="right" valign="top"><a class="el" href="base_8h.html#a8494e0457e1463d6d2b6836018d87b6e">lzma_ret</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="index__hash_8h.html#a891eb955284c9117155f92eb0ddba44c">lzma_index_hash_decode</a> (<a class="el" href="index__hash_8h.html#a2db9f438838c8ff72a8a6fd3fc856f8c">lzma_index_hash</a> *index_hash, const uint8_t *in, size_t *in_pos, size_t in_size) lzma_nothrow lzma_attr_warn_unused_result</td></tr>
<tr class="memdesc:a891eb955284c9117155f92eb0ddba44c"><td class="mdescLeft"> </td><td class="mdescRight">Decode and validate the Index field. <br /></td></tr>
<tr class="separator:a891eb955284c9117155f92eb0ddba44c"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a0f8ab3b57b117f9547866156755c917f"><td class="memItemLeft" align="right" valign="top"><a class="el" href="vli_8h.html#a1dbc0ffc3e72748f64df8f7f71898272">lzma_vli</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="index__hash_8h.html#a0f8ab3b57b117f9547866156755c917f">lzma_index_hash_size</a> (const <a class="el" href="index__hash_8h.html#a2db9f438838c8ff72a8a6fd3fc856f8c">lzma_index_hash</a> *index_hash) lzma_nothrow lzma_attr_pure</td></tr>
<tr class="memdesc:a0f8ab3b57b117f9547866156755c917f"><td class="mdescLeft"> </td><td class="mdescRight">Get the size of the Index field as bytes. <br /></td></tr>
<tr class="separator:a0f8ab3b57b117f9547866156755c917f"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Validate Index by using a hash function. </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>
<p>Hashing makes it possible to use constant amount of memory to validate Index of arbitrary size. </p>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="aaafae4967a4a266d97dc34a98bfcabfb" name="aaafae4967a4a266d97dc34a98bfcabfb"></a>
<h2 class="memtitle"><span class="permalink"><a href="#aaafae4967a4a266d97dc34a98bfcabfb">◆ </a></span>lzma_index_hash_init()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="index__hash_8h.html#a2db9f438838c8ff72a8a6fd3fc856f8c">lzma_index_hash</a> * lzma_index_hash_init </td>
<td>(</td>
<td class="paramtype"><a class="el" href="index__hash_8h.html#a2db9f438838c8ff72a8a6fd3fc856f8c">lzma_index_hash</a> * </td>
<td class="paramname"><em>index_hash</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="structlzma__allocator.html">lzma_allocator</a> * </td>
<td class="paramname"><em>allocator</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Allocate and initialize a new lzma_index_hash structure. </p>
<p>If index_hash is NULL, this function allocates and initializes a new lzma_index_hash structure and returns a pointer to it. If allocation fails, NULL is returned.</p>
<p>If index_hash is non-NULL, this function reinitializes the lzma_index_hash structure and returns the same pointer. In this case, return value cannot be NULL or a different pointer than the index_hash that was given as an argument.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">index_hash</td><td>Pointer to a lzma_index_hash structure or NULL. </td></tr>
<tr><td class="paramname">allocator</td><td><a class="el" href="structlzma__allocator.html" title="Custom functions for memory handling.">lzma_allocator</a> for custom allocator functions. Set to NULL to use malloc() and free().</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Initialized lzma_index_hash structure on success or NULL on failure. </dd></dl>
</div>
</div>
<a id="a7dacb41b9ec1c8df5d33dfdae97743b3" name="a7dacb41b9ec1c8df5d33dfdae97743b3"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a7dacb41b9ec1c8df5d33dfdae97743b3">◆ </a></span>lzma_index_hash_end()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname">void lzma_index_hash_end </td>
<td>(</td>
<td class="paramtype"><a class="el" href="index__hash_8h.html#a2db9f438838c8ff72a8a6fd3fc856f8c">lzma_index_hash</a> * </td>
<td class="paramname"><em>index_hash</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const <a class="el" href="structlzma__allocator.html">lzma_allocator</a> * </td>
<td class="paramname"><em>allocator</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Deallocate lzma_index_hash structure. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">index_hash</td><td>Pointer to a lzma_index_hash structure to free. </td></tr>
<tr><td class="paramname">allocator</td><td><a class="el" href="structlzma__allocator.html" title="Custom functions for memory handling.">lzma_allocator</a> for custom allocator functions. Set to NULL to use malloc() and free(). </td></tr>
</table>
</dd>
</dl>
</div>
</div>
<a id="a2bdbe4f0b5fa2fadb7528447feaaa97f" name="a2bdbe4f0b5fa2fadb7528447feaaa97f"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a2bdbe4f0b5fa2fadb7528447feaaa97f">◆ </a></span>lzma_index_hash_append()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="base_8h.html#a8494e0457e1463d6d2b6836018d87b6e">lzma_ret</a> lzma_index_hash_append </td>
<td>(</td>
<td class="paramtype"><a class="el" href="index__hash_8h.html#a2db9f438838c8ff72a8a6fd3fc856f8c">lzma_index_hash</a> * </td>
<td class="paramname"><em>index_hash</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="vli_8h.html#a1dbc0ffc3e72748f64df8f7f71898272">lzma_vli</a> </td>
<td class="paramname"><em>unpadded_size</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype"><a class="el" href="vli_8h.html#a1dbc0ffc3e72748f64df8f7f71898272">lzma_vli</a> </td>
<td class="paramname"><em>uncompressed_size</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Add a new Record to an Index hash. </p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">index_hash</td><td>Pointer to a lzma_index_hash structure </td></tr>
<tr><td class="paramname">unpadded_size</td><td>Unpadded Size of a Block </td></tr>
<tr><td class="paramname">uncompressed_size</td><td>Uncompressed Size of a Block</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Possible lzma_ret values:<ul>
<li>LZMA_OK</li>
<li>LZMA_DATA_ERROR: Compressed or uncompressed size of the Stream or size of the Index field would grow too big.</li>
<li>LZMA_PROG_ERROR: Invalid arguments or this function is being used when <a class="el" href="index__hash_8h.html#a891eb955284c9117155f92eb0ddba44c" title="Decode and validate the Index field.">lzma_index_hash_decode()</a> has already been used. </li>
</ul>
</dd></dl>
</div>
</div>
<a id="a891eb955284c9117155f92eb0ddba44c" name="a891eb955284c9117155f92eb0ddba44c"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a891eb955284c9117155f92eb0ddba44c">◆ </a></span>lzma_index_hash_decode()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="base_8h.html#a8494e0457e1463d6d2b6836018d87b6e">lzma_ret</a> lzma_index_hash_decode </td>
<td>(</td>
<td class="paramtype"><a class="el" href="index__hash_8h.html#a2db9f438838c8ff72a8a6fd3fc856f8c">lzma_index_hash</a> * </td>
<td class="paramname"><em>index_hash</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">const uint8_t * </td>
<td class="paramname"><em>in</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t * </td>
<td class="paramname"><em>in_pos</em>, </td>
</tr>
<tr>
<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>in_size</em> </td>
</tr>
<tr>
<td></td>
<td>)</td>
<td></td><td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Decode and validate the Index field. </p>
<p>After telling the sizes of all Blocks with <a class="el" href="index__hash_8h.html#a2bdbe4f0b5fa2fadb7528447feaaa97f" title="Add a new Record to an Index hash.">lzma_index_hash_append()</a>, the actual Index field is decoded with this function. Specifically, once decoding of the Index field has been started, no more Records can be added using <a class="el" href="index__hash_8h.html#a2bdbe4f0b5fa2fadb7528447feaaa97f" title="Add a new Record to an Index hash.">lzma_index_hash_append()</a>.</p>
<p>This function doesn't use <a class="el" href="structlzma__stream.html" title="Passing data to and from liblzma.">lzma_stream</a> structure to pass the input data. Instead, the input buffer is specified using three arguments. This is because it matches better the internal APIs of liblzma.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramdir"></td><td class="paramname">index_hash</td><td>Pointer to a lzma_index_hash structure </td></tr>
<tr><td class="paramdir"></td><td class="paramname">in</td><td>Pointer to the beginning of the input buffer </td></tr>
<tr><td class="paramdir">[out]</td><td class="paramname">in_pos</td><td>in[*in_pos] is the next byte to process </td></tr>
<tr><td class="paramdir"></td><td class="paramname">in_size</td><td>in[in_size] is the first byte not to process</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Possible lzma_ret values:<ul>
<li>LZMA_OK: So far good, but more input is needed.</li>
<li>LZMA_STREAM_END: Index decoded successfully and it matches the Records given with <a class="el" href="index__hash_8h.html#a2bdbe4f0b5fa2fadb7528447feaaa97f" title="Add a new Record to an Index hash.">lzma_index_hash_append()</a>.</li>
<li>LZMA_DATA_ERROR: Index is corrupt or doesn't match the information given with <a class="el" href="index__hash_8h.html#a2bdbe4f0b5fa2fadb7528447feaaa97f" title="Add a new Record to an Index hash.">lzma_index_hash_append()</a>.</li>
<li>LZMA_BUF_ERROR: Cannot progress because *in_pos >= in_size.</li>
<li>LZMA_PROG_ERROR </li>
</ul>
</dd></dl>
</div>
</div>
<a id="a0f8ab3b57b117f9547866156755c917f" name="a0f8ab3b57b117f9547866156755c917f"></a>
<h2 class="memtitle"><span class="permalink"><a href="#a0f8ab3b57b117f9547866156755c917f">◆ </a></span>lzma_index_hash_size()</h2>
<div class="memitem">
<div class="memproto">
<table class="memname">
<tr>
<td class="memname"><a class="el" href="vli_8h.html#a1dbc0ffc3e72748f64df8f7f71898272">lzma_vli</a> lzma_index_hash_size </td>
<td>(</td>
<td class="paramtype">const <a class="el" href="index__hash_8h.html#a2db9f438838c8ff72a8a6fd3fc856f8c">lzma_index_hash</a> * </td>
<td class="paramname"><em>index_hash</em></td><td>)</td>
<td></td>
</tr>
</table>
</div><div class="memdoc">
<p>Get the size of the Index field as bytes. </p>
<p>This is needed to verify the Backward Size field in the Stream Footer.</p>
<dl class="params"><dt>Parameters</dt><dd>
<table class="params">
<tr><td class="paramname">index_hash</td><td>Pointer to a lzma_index_hash structure</td></tr>
</table>
</dd>
</dl>
<dl class="section return"><dt>Returns</dt><dd>Size of the Index field in bytes. </dd></dl>
</div>
</div>
</div><!-- contents -->
<!-- start footer part -->
<hr class="footer"/><address class="footer"><small>
Generated by <a href="https://www.doxygen.org/index.html"><img class="footer" src="doxygen.svg" width="104" height="31" alt="doxygen"/></a> 1.9.7
</small></address>
</body>
</html>
|