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<title>Crashpad: crashpad::FileReaderInterface Class Reference</title>
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<li class="navelem"><a class="el" href="namespacecrashpad.html">crashpad</a></li><li class="navelem"><a class="el" href="classcrashpad_1_1FileReaderInterface.html">FileReaderInterface</a></li> </ul>
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<div class="header">
<div class="summary">
<a href="#pub-methods">Public Member Functions</a> |
<a href="classcrashpad_1_1FileReaderInterface-members.html">List of all members</a> </div>
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<div class="title">crashpad::FileReaderInterface Class Reference<span class="mlabels"><span class="mlabel">abstract</span></span></div> </div>
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<p>An interface to read to files and other file-like objects with semantics matching the underlying platform (POSIX or Windows).
<a href="classcrashpad_1_1FileReaderInterface.html#details">More...</a></p>
<p><code>#include "util/file/file_reader.h"</code></p>
<div class="dynheader">
Inheritance diagram for crashpad::FileReaderInterface:</div>
<div class="dyncontent">
<div class="center">
<img src="classcrashpad_1_1FileReaderInterface.png" usemap="#crashpad::FileReaderInterface_map" alt=""/>
<map id="crashpad::FileReaderInterface_map" name="crashpad::FileReaderInterface_map">
<area href="classcrashpad_1_1FileSeekerInterface.html" title="An interface to seek in files and other file-like objects with semantics matching the underlying plat..." alt="crashpad::FileSeekerInterface" shape="rect" coords="352,0,577,24"/>
<area href="classcrashpad_1_1FileReader.html" title="A file reader implementation that wraps traditional system file operations on files accessed through ..." alt="crashpad::FileReader" shape="rect" coords="0,112,225,136"/>
<area href="classcrashpad_1_1StringFile.html" title="A file reader and writer backed by a virtual file, as opposed to a file on disk or other operating sy..." alt="crashpad::StringFile" shape="rect" coords="235,112,460,136"/>
<area href="classcrashpad_1_1WeakFileHandleFileReader.html" title="A file reader backed by a FileHandle. " alt="crashpad::WeakFileHandleFileReader" shape="rect" coords="470,112,695,136"/>
<area href="classcrashpad_1_1WeakStdioFileReader.html" title="A file reader backed by a standard input/output FILE*. " alt="crashpad::WeakStdioFileReader" shape="rect" coords="705,112,930,136"/>
</map>
</div></div>
<table class="memberdecls">
<tr class="heading"><td colspan="2"><h2 class="groupheader"><a name="pub-methods"></a>
Public Member Functions</h2></td></tr>
<tr class="memitem:ad9035ff345274f33cef248712d53d9e1"><td class="memItemLeft" align="right" valign="top">virtual FileOperationResult </td><td class="memItemRight" valign="bottom"><a class="el" href="classcrashpad_1_1FileReaderInterface.html#ad9035ff345274f33cef248712d53d9e1">Read</a> (void *data, size_t size)=0</td></tr>
<tr class="memdesc:ad9035ff345274f33cef248712d53d9e1"><td class="mdescLeft"> </td><td class="mdescRight">Wraps <a class="el" href="namespacecrashpad.html#a8599600814a17d622766decd5f122a96" title="Reads from a file, retrying when interrupted on POSIX or following a short read. ">ReadFile()</a>, or provides an implementation with identical semantics. <a href="#ad9035ff345274f33cef248712d53d9e1">More...</a><br /></td></tr>
<tr class="separator:ad9035ff345274f33cef248712d53d9e1"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:ad046f1ebf1071eb6b92a2a8d06c14a56"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classcrashpad_1_1FileReaderInterface.html#ad046f1ebf1071eb6b92a2a8d06c14a56">ReadExactly</a> (void *data, size_t size)</td></tr>
<tr class="memdesc:ad046f1ebf1071eb6b92a2a8d06c14a56"><td class="mdescLeft"> </td><td class="mdescRight">Wraps <a class="el" href="classcrashpad_1_1FileReaderInterface.html#ad9035ff345274f33cef248712d53d9e1" title="Wraps ReadFile(), or provides an implementation with identical semantics. ">Read()</a>, ensuring that the read succeeded and exactly <em>size</em> bytes were read. <a href="#ad046f1ebf1071eb6b92a2a8d06c14a56">More...</a><br /></td></tr>
<tr class="separator:ad046f1ebf1071eb6b92a2a8d06c14a56"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="inherit_header pub_methods_classcrashpad_1_1FileSeekerInterface"><td colspan="2" onclick="javascript:toggleInherit('pub_methods_classcrashpad_1_1FileSeekerInterface')"><img src="closed.png" alt="-"/> Public Member Functions inherited from <a class="el" href="classcrashpad_1_1FileSeekerInterface.html">crashpad::FileSeekerInterface</a></td></tr>
<tr class="memitem:a8d56f7d12dfcce3e4a39ad1524302aa1 inherit pub_methods_classcrashpad_1_1FileSeekerInterface"><td class="memItemLeft" align="right" valign="top">virtual <a class="el" href="namespacecrashpad.html#a1e53a1957d9edcba8b406ea632b6daf2">FileOffset</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classcrashpad_1_1FileSeekerInterface.html#a8d56f7d12dfcce3e4a39ad1524302aa1">Seek</a> (<a class="el" href="namespacecrashpad.html#a1e53a1957d9edcba8b406ea632b6daf2">FileOffset</a> offset, int whence)=0</td></tr>
<tr class="memdesc:a8d56f7d12dfcce3e4a39ad1524302aa1 inherit pub_methods_classcrashpad_1_1FileSeekerInterface"><td class="mdescLeft"> </td><td class="mdescRight">Wraps <a class="el" href="namespacecrashpad.html#a3d6cedc10e24145d4a0c1000c33f8a10" title="Wraps lseek() or SetFilePointerEx(). Logs an error if the operation fails. ">LoggingSeekFile()</a> or provides an alternate implementation with identical semantics. <a href="classcrashpad_1_1FileSeekerInterface.html#a8d56f7d12dfcce3e4a39ad1524302aa1">More...</a><br /></td></tr>
<tr class="separator:a8d56f7d12dfcce3e4a39ad1524302aa1 inherit pub_methods_classcrashpad_1_1FileSeekerInterface"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:a49a884bfb0a61461b0291c975aa15382 inherit pub_methods_classcrashpad_1_1FileSeekerInterface"><td class="memItemLeft" align="right" valign="top"><a class="el" href="namespacecrashpad.html#a1e53a1957d9edcba8b406ea632b6daf2">FileOffset</a> </td><td class="memItemRight" valign="bottom"><a class="el" href="classcrashpad_1_1FileSeekerInterface.html#a49a884bfb0a61461b0291c975aa15382">SeekGet</a> ()</td></tr>
<tr class="memdesc:a49a884bfb0a61461b0291c975aa15382 inherit pub_methods_classcrashpad_1_1FileSeekerInterface"><td class="mdescLeft"> </td><td class="mdescRight">Wraps <a class="el" href="classcrashpad_1_1FileSeekerInterface.html#a8d56f7d12dfcce3e4a39ad1524302aa1" title="Wraps LoggingSeekFile() or provides an alternate implementation with identical semantics. ">Seek()</a>, using <code>SEEK_CUR</code> to obtain the file’s current position. <a href="classcrashpad_1_1FileSeekerInterface.html#a49a884bfb0a61461b0291c975aa15382">More...</a><br /></td></tr>
<tr class="separator:a49a884bfb0a61461b0291c975aa15382 inherit pub_methods_classcrashpad_1_1FileSeekerInterface"><td class="memSeparator" colspan="2"> </td></tr>
<tr class="memitem:add2e1ee642d94c91ef722911e9aee250 inherit pub_methods_classcrashpad_1_1FileSeekerInterface"><td class="memItemLeft" align="right" valign="top">bool </td><td class="memItemRight" valign="bottom"><a class="el" href="classcrashpad_1_1FileSeekerInterface.html#add2e1ee642d94c91ef722911e9aee250">SeekSet</a> (<a class="el" href="namespacecrashpad.html#a1e53a1957d9edcba8b406ea632b6daf2">FileOffset</a> offset)</td></tr>
<tr class="memdesc:add2e1ee642d94c91ef722911e9aee250 inherit pub_methods_classcrashpad_1_1FileSeekerInterface"><td class="mdescLeft"> </td><td class="mdescRight">Wraps <a class="el" href="classcrashpad_1_1FileSeekerInterface.html#a8d56f7d12dfcce3e4a39ad1524302aa1" title="Wraps LoggingSeekFile() or provides an alternate implementation with identical semantics. ">Seek()</a>, using <code>SEEK_SET</code>, ensuring that the seek succeeded and the file is positioned as desired. <a href="classcrashpad_1_1FileSeekerInterface.html#add2e1ee642d94c91ef722911e9aee250">More...</a><br /></td></tr>
<tr class="separator:add2e1ee642d94c91ef722911e9aee250 inherit pub_methods_classcrashpad_1_1FileSeekerInterface"><td class="memSeparator" colspan="2"> </td></tr>
</table>
<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>An interface to read to files and other file-like objects with semantics matching the underlying platform (POSIX or Windows). </p>
</div><h2 class="groupheader">Member Function Documentation</h2>
<a id="ad9035ff345274f33cef248712d53d9e1"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ad9035ff345274f33cef248712d53d9e1">§ </a></span>Read()</h2>
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<td class="memname">virtual FileOperationResult crashpad::FileReaderInterface::Read </td>
<td>(</td>
<td class="paramtype">void * </td>
<td class="paramname"><em>data</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>size</em> </td>
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<td>)</td>
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<span class="mlabels"><span class="mlabel">pure virtual</span></span> </td>
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<p>Wraps <a class="el" href="namespacecrashpad.html#a8599600814a17d622766decd5f122a96" title="Reads from a file, retrying when interrupted on POSIX or following a short read. ">ReadFile()</a>, or provides an implementation with identical semantics. </p>
<dl class="section return"><dt>Returns</dt><dd>The number of bytes actually read if the operation succeeded, which may be <code>0</code> or any positive value less than or equal to <em>size</em>. <code>-1</code> if the operation failed, with an error message logged. </dd></dl>
<p>Implemented in <a class="el" href="classcrashpad_1_1WeakStdioFileReader.html#adcedaed4a1465abddb7ac3c1f3643ff8">crashpad::WeakStdioFileReader</a>, <a class="el" href="classcrashpad_1_1FileReader.html#a71bb3e12f135a0e84b1385ab89e46611">crashpad::FileReader</a>, <a class="el" href="classcrashpad_1_1WeakFileHandleFileReader.html#adabfaf3549ac5a3269475a567645e095">crashpad::WeakFileHandleFileReader</a>, and <a class="el" href="classcrashpad_1_1StringFile.html#a05de4b2d8ef91a974181d7340c61b346">crashpad::StringFile</a>.</p>
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<a id="ad046f1ebf1071eb6b92a2a8d06c14a56"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ad046f1ebf1071eb6b92a2a8d06c14a56">§ </a></span>ReadExactly()</h2>
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<td class="memname">bool crashpad::FileReaderInterface::ReadExactly </td>
<td>(</td>
<td class="paramtype">void * </td>
<td class="paramname"><em>data</em>, </td>
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<td class="paramkey"></td>
<td></td>
<td class="paramtype">size_t </td>
<td class="paramname"><em>size</em> </td>
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<td>)</td>
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<p>Wraps <a class="el" href="classcrashpad_1_1FileReaderInterface.html#ad9035ff345274f33cef248712d53d9e1" title="Wraps ReadFile(), or provides an implementation with identical semantics. ">Read()</a>, ensuring that the read succeeded and exactly <em>size</em> bytes were read. </p>
<p>Semantically, this behaves as <a class="el" href="namespacecrashpad.html#abd2a51526c1f15e3f21a962457cbc53a" title="Wraps ReadFile(), ensuring that exactly size bytes are read. ">LoggingReadFile()</a>.</p>
<dl class="section return"><dt>Returns</dt><dd><code>true</code> if the operation succeeded, <code>false</code> if it failed, with an error message logged. Short reads are treated as failures. </dd></dl>
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<hr/>The documentation for this class was generated from the following files:<ul>
<li>util/file/file_reader.h</li>
<li>util/file/file_reader.cc</li>
</ul>
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