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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd">
<html lang="ja">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=Shift_JIS">
<meta http-equiv="Content-Style-Type" content="text/css">
<link rel="up" title="FatFs" href="../00index_j.html">
<link rel="stylesheet" href="../css_j.css" type="text/css" media="screen" title="ELM Default">
<title>FatFs - f_lseek</title>
</head>
<body>
<div class="para">
<h2>f_lseek</h2>
<p>t@CR/W|C^ړ܂B</p>
<pre>
FRESULT f_lseek (
FIL* <em>FileObject</em>, /* t@CEIuWFNg\̂ւ̃|C^ */
DWORD <em>Offset</em> /* ړItZbg */
);
</pre>
</div>
<div class="para">
<h4></h4>
<dl class="par">
<dt>FileObject</dt>
<dd>ΏۂƂȂt@CEIuWFNg\̂ւ̃|C^w肵܂B</dd>
<dt>Offset</dt>
<dd>ړ̃ItZbgiR/W|C^jlBt@C擪̃ItZbgoCgPʂŎw肵܂B</dd>
</dl>
</div>
<div class="para">
<h4>߂l</h4>
<dl class="ret">
<dt>FR_OK (0)</dt>
<dd>IB</dd>
<dt>FR_DISK_ERR</dt>
<dd>fBXNEG[ɂ鎸sB</dd>
<dt>FR_INT_ERR</dt>
<dd>sFAT\܂͓G[ɂ鎸sB</dd>
<dt>FR_NOT_READY</dt>
<dd>fBAZbgĂȂȂǁAhCus\ԁB</dd>
<dt>FR_INVALID_OBJECT</dt>
<dd>ȃt@CEIuWFNgB</dd>
</dl>
</div>
<div class="para">
<h4></h4>
<p>t@CR/W|C^(t@CEIuWFNgfptroŁAɓǂݏoE݂oCg̃ItZbg)ړ܂BItZbǧ_̓t@C擪łB݃[hŃt@CETCY傫Ȓlw肷ƁA܂Ńt@CgAgꂽ̃f[^͖`ƂȂ܂Bf[^xɏ݂Ƃ́A\߂̊ŕKvȃTCY܂Ńt@CETCYgĂƗǂł傤Bf_lseekIƂ́At@CR/W|C^ړfptr`FbNׂłBt@CR/W|C^w菬Ƃ́Ǎl܂B</p>
<ul>
<li>݃[ĥ߁At@CETCYŃNbvꂽB</li>
<li>t@CgɃfBXNtɂȂB</li>
</ul>
</div>
<div class="para">
<h4>Ή</h4>
<p><tt>_FS_MINIMIZE < 3</tt>̂Ƃgp\łB</p>
</div>
<div class="para">
<h4>gp</h4>
<pre>
/* ItZbg5000ֈړ */
res = f_lseek(&file, 5000);
/* t@CNjL̏ (t@CI[ֈړ) */
res = f_lseek(&file, file.fsize);
/* 3000oCgi߂ */
res = f_lseek(&file, file.fptr + 3000);
/* 2000oCg߂ (I[o[t[ɒ) */
res = f_lseek(&file, file.fptr - 2000);
</pre>
<pre>
/* NX^s蓖 (Xg[~OECg̃obt@EI[o[h~) */
res = f_open(&file, "record.wav", FA_CREATE_NEW | FA_WRITE); /* t@C쐬 */
res = f_lseek(&file, MAX_SIZE); /* \ȃNX^̐s蓖 */
if (res || file.fptr != PRE_SIZE) .... /* t@Cgꂽ`FbN */
res = f_lseek(&file, DATA_START); /* f[^EXg[̋L^(AP[VfBC) */
...
res = f_truncate(&file); /* sv̈̐̂ */
res = f_lseek(&file, 0); /* wb_̋L^ */
...
res = f_close(&file);
</pre>
</div>
<div class="para">
<h4>Q</h4>
<p><tt><a href="open.html">f_open</a>, <a href="sfile.html">FIL</a></tt></p>
</div>
<p class="foot"><a href="../00index_j.html">߂</a></p>
</body>
</html>
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