FreeRTOS/Common/FileSystem/FatFs-0.7e/doc/ja/forward.html

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   8 <title>FatFs - f_forward</title>
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  10
  11 <body>
  12
  13 <div class="para">
  14 <h2>f_forward</h2>
  15 <p>ƒtƒ@ƒCƒ‹‚©‚çƒf�[ƒ^‚ð“Ç‚Ý�o‚µ�A‘—�MƒXƒgƒŠ�[ƒ€‚É’¼�Ú“]‘—‚µ‚Ü‚·�B</p>
  16 <pre>
  17 FRESULT f_forward (
  18   FIL* <em>FileObject</em>,                 /* ƒtƒ@ƒCƒ‹�EƒIƒuƒWƒFƒNƒg�\‘¢‘Ì */
  19   UINT (*<em>Func</em>)(const BYTE*,UINT),  /* ƒf�[ƒ^“]‘—ŠÖ�” */
  20   UINT <em>ByteToFwd</em>,                  /* “]‘—‚·‚éƒoƒCƒg�” */
  21   UINT* <em>ByteFwd</em>                    /* “]‘—‚³‚ê‚½ƒoƒCƒg�” */
  22 );
  23 </pre>
  24 </div>
  25
  26 <div class="para">
  27 <h4>ˆø�”</h4>
  28 <dl class="par">
  29 <dt>FileObject</dt>
  30 <dd>ƒtƒ@ƒCƒ‹�EƒIƒuƒWƒFƒNƒg�\‘¢‘Ì‚Ö‚Ìƒ|ƒCƒ“ƒ^‚ðŽw’è‚µ‚Ü‚·�B</dd>
  31 <dt>Func</dt>
  32 <dd>ƒf�[ƒ^‚ð“n‚·ƒ†�[ƒU’è‹`ŠÖ�”‚Ö‚Ìƒ|ƒCƒ“ƒ^‚ðŽw’è‚µ‚Ü‚·�B‚±‚ÌŠÖ�”‚ÌŽd—l‚ÍƒTƒ“ƒvƒ‹‚ðŽQ�Æ‚µ‚Ä‚‚¾‚³‚¢�B</dd>
  33 <dt>ByteToRead</dt>
  34 <dd>“]‘—‚·‚éƒoƒCƒg�”(0�`UINT‚Ì�Å‘å’l)‚ðŽw’è‚µ‚Ü‚·�B</dd>
  35 <dt>ByteRead</dt>
  36 <dd>ŽÀ�Û‚É“]‘—‚³‚ê‚½ƒoƒCƒg�”‚ðŠi”[‚·‚é•Ï�”‚ðŽw‚·ƒ|ƒCƒ“ƒ^‚ðŽw’è‚µ‚Ü‚·�B</dd>
  37 </dl>
  38 </div>
  39
  40
  41 <div class="para">
  42 <h4>–ß‚è’l</h4>
  43 <dl class="ret">
  44 <dt>FR_OK (0)</dt>
  45 <dd>�³�í�I—¹�B</dd>
  46 <dt>FR_DENIED</dt>
  47 <dd>”ñ“Ç‚Ý�ž‚Ýƒ‚�[ƒh‚ÅŠJ‚¢‚½ƒtƒ@ƒCƒ‹‚©‚ç“Ç‚Ý�ž‚à‚¤‚Æ‚µ‚½�B</dd>
  48 <dt>FR_DISK_ERR</dt>
  49 <dd>ƒfƒBƒXƒN�EƒGƒ‰�[‚É‚æ‚éŽ¸”s�B</dd>
  50 <dt>FR_INT_ERR</dt>
  51 <dd>•s�³‚ÈFAT�\‘¢‚Ü‚½‚Í“à•”ƒGƒ‰�[‚É‚æ‚éŽ¸”s�B</dd>
  52 <dt>FR_NOT_READY</dt>
  53 <dd>ƒ�ƒfƒBƒA‚ªƒZƒbƒg‚³‚ê‚Ä‚¢‚È‚¢‚È‚Ç�A•¨—�ƒhƒ‰ƒCƒu‚ª“®�ì•s”\�ó‘Ô�B</dd>
  54 <dt>FR_INVALID_OBJECT</dt>
  55 <dd>–³Œø‚Èƒtƒ@ƒCƒ‹�EƒIƒuƒWƒFƒNƒg�B</dd>
  56 </dl>
  57 </div>
  58
  59
  60 <div class="para">
  61 <h4>‰ð�à</h4>
  62 <p>ƒtƒ@ƒCƒ‹‚Ìƒf�[ƒ^‚ðƒoƒbƒtƒ@‚É“Ç‚Ý�o‚³‚¸‚É‘—�MƒXƒgƒŠ�[ƒ€‚É’¼�Ú“]‘—‚µ‚Ü‚·�BƒAƒvƒŠƒP�[ƒVƒ‡ƒ“‘¤‚Åƒf�[ƒ^�Eƒoƒbƒtƒ@‚ð•K—v‚Æ‚µ‚È‚¢‚Ì‚Å�Aƒ�ƒ‚ƒŠ‚ÌŒÀ‚ç‚ê‚½ŠÂ‹«‚Å—LŒø‚Å‚·�B“]‘—ŠJŽnˆÊ’u‚Í�AŒ»�Ý‚Ìƒtƒ@ƒCƒ‹R/Wƒ|ƒCƒ“ƒ^‚©‚ç‚É‚È‚è‚Ü‚·�Bƒtƒ@ƒCƒ‹R/Wƒ|ƒCƒ“ƒ^‚Í“]‘—‚³‚ê‚½ƒoƒCƒg�”‚¾‚¯�i‚Ý‚Ü‚·�BŽw’è‚³‚ê‚½ƒoƒCƒg�”‚Ì“]‘—’†‚Éƒtƒ@ƒCƒ‹‚Ì�I’[‚É’B‚µ‚½�ê�‡‚â‘—�MƒXƒgƒŠ�[ƒ€‚ªƒrƒW�[‚É‚È‚Á‚½�ê�‡�A<tt>*ByteFwd</tt>‚Í<tt>ByteToFwd</tt>‚æ‚è‚à�¬‚³‚‚È‚è‚Ü‚·�B</p>
  63 </div>
  64
  65
  66 <div class="para">
  67 <h4>‘Î‰ž�î•ñ</h4>
  68 <p><tt>_USE_FORWARD == 1</tt>‚Å�AŠŽ‚Â<tt>_FS_TINY == 1</tt>‚Ì‚Æ‚«‚ÉŽg—p‰Â”\‚Å‚·�B</p>
  69 </div>
  70
  71
  72 <div class="para">
  73 <h4>Žg—p—á�iƒI�[ƒfƒBƒI�Ä�¶�j</h4>
  74 <pre>
  75 /*-----------------------------------------------------------------------*/
  76 /* f_forwardŠÖ�”‚©‚çŒÄ‚Î‚ê‚éƒf�[ƒ^‘—�MŠÖ�”‚Ì—á                           */
  77 /*-----------------------------------------------------------------------*/
  78
  79 UINT out_stream (   /* –ß‚è’l: “]‘—‚³‚ê‚½ƒoƒCƒg�”‚Ü‚½‚ÍƒXƒgƒŠ�[ƒ€‚Ì�ó‘Ô */
  80     const BYTE *p,  /* “]‘—‚·‚éƒf�[ƒ^‚ðŽw‚·ƒ|ƒCƒ“ƒ^ */
  81     UINT btf        /* &gt;0: “]‘—‚ð�s‚¤(ƒoƒCƒg�”). 0: ƒXƒgƒŠ�[ƒ€‚Ì�ó‘Ô‚ð’²‚×‚é */
  82 )
  83 {
  84     UINT cnt = 0;
  85
  86
  87     if (btf == 0) {     /* ƒZƒ“ƒX—v‹� */
  88         /* ƒXƒgƒŠ�[ƒ€‚Ì�ó‘Ô‚ð•Ô‚· (0: ƒrƒW�[, 1: ƒŒƒfƒB) */
  89         /* ˆê’U�AƒŒƒfƒB‚ð•Ô‚µ‚½‚ç�A‘±‚“]‘——v‹�‚Å�‚È‚‚Æ‚à1ƒoƒCƒg‚Í */
  90         /* “]‘—‚³‚ê‚È‚¢‚Æ f_forwardŠÖ�”‚Í FR_RW_ERROR ‚Æ‚È‚é�B */
  91         if (FIFO_READY) cnt = 1;
  92     }
  93     else {              /* “]‘——v‹� */
  94         do {    /* ‘S‚Ä‚ÌƒoƒCƒg‚ð“]‘—‚·‚é‚©�AƒXƒgƒŠ�[ƒ€‚ªƒrƒW�[‚É‚È‚é‚Ü‚ÅŒJ‚è•Ô‚· */
  95             FIFO_PORT = *p++;
  96             cnt++;
  97         } while (cnt &lt; btf &amp;&amp; FIFO_READY);
  98     }
  99
 100     return cnt;
 101 }
 102
 103
 104 /*-----------------------------------------------------------------------*/
 105 /* f_forwardŠÖ�”‚ÌŽg—p—á                                                 */
 106 /*-----------------------------------------------------------------------*/
 107
 108 FRESULT play_file (
 109     char *fn        /* �Ä�¶‚·‚éƒI�[ƒfƒBƒI�Eƒtƒ@ƒCƒ‹–¼‚ðŽw‚·ƒ|ƒCƒ“ƒ^ */
 110 )
 111 {
 112     FRESULT rc;
 113     FIL fil;
 114     UINT dmy;
 115
 116     /* ƒtƒ@ƒCƒ‹‚ð“Ç‚Ý�o‚µƒ‚�[ƒh‚ÅŠJ‚ */
 117     rc = f_open(&amp;fil, fn, FA_READ);
 118
 119     /* ‘S‚Ä‚Ìƒf�[ƒ^‚ª“]‘—‚³‚ê‚é‚©ƒGƒ‰�[‚ª”�¶‚·‚é‚Ü‚Å‘±‚¯‚é */
 120     while (rc == FR_OK &amp;&amp; fil.fptr &lt; fil.fsize) {
 121
 122         /* ‚Ù‚©‚Ì�ˆ—�... */
 123
 124         /* ’èŠú“I‚Ü‚½‚Í—v‹�‚É‰ž‚¶‚Äƒf�[ƒ^‚ðƒXƒgƒŠ�[ƒ€‚É‘—�o‚·‚é */
 125         rc = f_forward(&amp;fil, out_stream, 1000, &amp;dmy);
 126     }
 127
 128     return rc;  /* FR_OK: �³�í�I—¹, ‚Ù‚©:ˆÙ�í�I—¹ */
 129 }
 130 </pre>
 131 </div>
 132
 133
 134 <div class="para">
 135 <h4>ŽQ�Æ</h4>
 136 <p><tt><a href="open.html">f_open</a>, <a href="gets.html">fgets</a>, <a href="write.html">f_write</a>, <a href="close.html">f_close</a>, <a href="sfile.html">FIL</a></tt></p>
 137 </div>
 138
 139 <p class="foot"><a href="../00index_j.html">–ß‚é</a></p>
 140 </body>
 141 </html>