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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="alternate" hreflang="en" title="English" href="../en/open.html">
<link rel="stylesheet" href="../css_j.css" type="text/css" media="screen" title="ELM Default">
<title>FatFs - f_open</title>
</head>

<body>

<div class="para func">
<h2>f_open</h2>
<p>�t�@�C�����I�[�v���܂��͍쐬���܂��B</p>
<pre>
FRESULT f_open (
  FIL* <span class="arg">fp</span>,           <span class="c">/* [OUT] ��̃t�@�C���E�I�u�W�F�N�g�\���̂ւ̃|�C���^ */</span>
  const TCHAR* <span class="arg">path</span>, <span class="c">/* [IN] �t�@�C�����ւ̃|�C���^ */</span>
  BYTE <span class="arg">mode</span>          <span class="c">/* [IN] ���[�h�t���O */</span>
);
</pre>
</div>

<div class="para arg">
<h4>����</h4>
<dl class="par">
<dt>fp</dt>
<dd>�V�����쐬����t�@�C���E�I�u�W�F�N�g�\���̂ւ̃|�C���^���w�肵�܂��B�ȍ~�A���̃t�@�C����‚���܂ł��̃t�@�C���E�I�u�W�F�N�g���g�p���ăt�@�C����������܂��B</dd>
<dt>path</dt>
<dd>�J���t�@�C����<a href="filename.html">�t�@�C����</a>�������k������<tt>'\0'</tt>�I�[�̕�����ւ̃|�C���^���w�肵�܂��B</dd>
<dt>mode</dt>
<dd>�t�@�C���̃A�N�Z�X���@��I�[�v�����@�����߂�t���O�ł��B���̃p�����[�^�ɂ͎��̑g�ݍ��킹���w�肵�܂��B<br>
<table class="lst">
<tr><th>�l</th><th>�Ӗ�</th></tr>
<tr><td>FA_READ</td><td>�ǂݏo�����[�h�ŊJ���܂��B�ǂݏ�������ꍇ��<tt>FA_WRITE</tt>�Ƌ��Ɏw�肵�܂��B</td></tr>
<tr><td>FA_WRITE</td><td>�������݃��[�h�ŊJ���܂��B�ǂݏ�������ꍇ��<tt>FA_READ</tt>�Ƌ��Ɏw�肵�܂��B</td></tr>
<tr><td>FA_OPEN_EXISTING</td><td>�����̃t�@�C�����J���܂��B�t�@�C���������Ƃ��̓G���[�ɂȂ�܂��B(�f�t�H���g)</td></tr>
<tr><td>FA_OPEN_ALWAYS</td><td>�����̃t�@�C�����J���܂��B�t�@�C���������Ƃ��̓t�@�C�����쐬���܂��B�NjL�̏ꍇ�́A���̕��@�ŃI�[�v��������A<a href="lseek.html"><tt>f_lseek()</tt></a>�Ńt�@�C���̍Ō���Ɉړ����Ă��������B</td></tr>
<tr><td>FA_CREATE_NEW</td><td>�t�@�C�����쐬���܂��B�����̃t�@�C��������ꍇ�́A<tt>FR_EXIST</tt>�Ŏ��s���܂��B</td></tr>
<tr><td>FA_CREATE_ALWAYS</td><td>�t�@�C�����쐬���܂��B�����̃t�@�C��������ꍇ�́A�T�C�Y��0�ɂ��Ă���J���܂��B</td></tr>
</table>
</dd>
</dl>
</div>


<div class="para ret">
<h4>�߂�l</h4>
<p>
<a href="rc.html#ok">FR_OK</a>,
<a href="rc.html#de">FR_DISK_ERR</a>,
<a href="rc.html#ie">FR_INT_ERR</a>,
<a href="rc.html#nr">FR_NOT_READY</a>,
<a href="rc.html#ok">FR_NO_FILE</a>,
<a href="rc.html#np">FR_NO_PATH</a>,
<a href="rc.html#in">FR_INVALID_NAME</a>,
<a href="rc.html#de">FR_DENIED</a>,
<a href="rc.html#ex">FR_EXIST</a>,
<a href="rc.html#io">FR_INVALID_OBJECT</a>,
<a href="rc.html#wp">FR_WRITE_PROTECTED</a>,
<a href="rc.html#id">FR_INVALID_DRIVE</a>,
<a href="rc.html#ne">FR_NOT_ENABLED</a>,
<a href="rc.html#ns">FR_NO_FILESYSTEM</a>,
<a href="rc.html#tm">FR_TIMEOUT</a>,
<a href="rc.html#lo">FR_LOCKED</a>,
<a href="rc.html#nc">FR_NOT_ENOUGH_CORE</a>,
<a href="rc.html#tf">FR_TOO_MANY_OPEN_FILES</a>
</p>
</div>


<div class="para desc">
<h4>���</h4>
<p>�����̃t�@�C�����J������A�V�����t�@�C�����쐬���܂��B�֐�����������ƃt�@�C���E�I�u�W�F�N�g���쐬����A�ȍ~���̃t�@�C���ɑ΂���A�N�Z�X�Ɏg�p���܂��B�t�@�C����‚���Ƃ��́A<a href="close.html"><tt>f_close()</tt></a>���g�p���܂��B���炩�̕ύX���s��ꂽ�t�@�C�������̌㐳�����‚����Ȃ������ꍇ�A���̃t�@�C�����j������ꍇ������܂��B</p>
<p>���ɊJ����Ă���t�@�C�����J���K�v������ꍇ�́A<a href="appnote.html#dup">���d�A�N�Z�X����</a>���Q�Ƃ��Ă��������B�������A��‚̃t�@�C���ɑ΂��鏑�����݃��[�h���܂ޏd���I�[�v���͏�ɋ֎~�ł��B</p>
<p>�t�@�C���E�A�N�Z�X���J�n����O�ɁA<a href="mount.html"><tt>f_mount()</tt></a>���g���Ă��ꂼ��̘_���h���C�u�Ƀ��[�N�E�G���A(�t�@�C���E�V�X�e���E�I�u�W�F�N�g)��^����K�v������܂��B���̏������̌�A���̘_���h���C�u�ɑ΂��đS�Ẵt�@�C���֐����g����悤�ɂȂ�܂��B</p>
</div>


<div class="para comp">
<h4>�Ή����</h4>
<p>�S�Ă̍\���Ŏg�p�”\�ł��B<tt>_FS_READONLY == 1</tt>�̂Ƃ��́A<tt>FA_WRITE, FA_CREATE_ALWAYS, FA_CREATE_NEW, FA_OPEN_ALWAYS</tt>�̊e�t���O�̓T�|�[�g����܂���B</p>
</div>


<div class="para use">
<h4>�g�p��</h4>
<pre>
<span class="c">/* �e�L�X�g�t�@�C����ǂݏo���ĕ\�� */</span>

FATFS FatFs;   <span class="c">/* �_���h���C�u�̃��[�N�E�G���A(�t�@�C���E�V�X�e���E�I�u�W�F�N�g) */</span>

int main (void)
{
    FIL fil;       <span class="c">/* �t�@�C���E�I�u�W�F�N�g */</span>
    char line[82]; <span class="c">/* �s�o�b�t�@ */</span>
    FRESULT fr;    <span class="c">/* �߂�l */</span>


    <span class="c">/* �f�t�H���g�E�h���C�u�Ƀ��[�N�G���A��^���� */</span>
    f_mount(&amp;FatFs, "", 0);

    <span class="c">/* �e�L�X�g�E�t�@�C�����J�� */</span>
    fr = f_open(&amp;fil, "message.txt", FA_READ);
    if (fr) return (int)fr;

    <span class="c">/* 1�s���“ǂݏo���ĕ\�� */</span>
    while (f_gets(line, sizeof line, &amp;fil))
        printf(line);

    <span class="c">/* �t�@�C����‚��� */</span>
    f_close(&amp;fil);

    return 0;
}
</pre>
<pre>
<span class="c">/* �h���C�u1�̃t�@�C�� "file.bin" ���h���C�u0�փR�s�[ */</span>

int main (void)
{
    FATFS fs[2];         <span class="c">/* �_���h���C�u�̃��[�N�G���A(�t�@�C���E�V�X�e���E�I�u�W�F�N�g) */</span>
    FIL fsrc, fdst;      <span class="c">/* �t�@�C���E�I�u�W�F�N�g */</span>
    BYTE buffer[4096];   <span class="c">/* File copy buffer */</span>
    FRESULT fr;          <span class="c">/* FatFs function common result code */</span>
    UINT br, bw;         <span class="c">/* File R/W count */</span>

    <span class="c">/* �h���C�u0,1�Ƀ��[�N�E�G���A��^���� */</span>
    f_mount(&amp;fs[0], "0:", 0);
    f_mount(&amp;fs[1], "1:", 0);

    <span class="c">/* �h���C�u1�̃R�s�[���t�@�C�����J�� */</span>
    res = f_open(&amp;fsrc, "1:file.dat", FA_OPEN_EXISTING | FA_READ);
    if (fr) return (int)fr;

    <span class="c">/* �h���C�u0�ɃR�s�[��t�@�C�����쐬���� */</span>
    res = f_open(&amp;fdst, "0:file.dat", FA_CREATE_ALWAYS | FA_WRITE);
    if (fr) return (int)fr;

    <span class="c">/* �R�s�[������R�s�[��Ƀf�[�^�]������ */</span>
    for (;;) {
        res = f_read(&amp;fsrc, buffer, sizeof buffer, &amp;br); <span class="c">/* �R�s�[�����炩��ǂݏo�� */</span>
        if (res || br == 0) break;   <span class="c">/* �G���[���t�@�C���I�[ */</span>
        res = f_write(&amp;fdst, buffer, br, &amp;bw);           <span class="c">/* ������R�s�[��ɏ������� */</span>
        if (res || bw &lt; br) break;   <span class="c">/* �G���[���f�B�X�N���t */</span>
    }

    <span class="c">/* �S�Ẵt�@�C����‚��� */</span>
    f_close(&amp;fsrc);
    f_close(&amp;fdst);

    <span class="c">/* ���[�N�E�G���A���J������ */</span>
    f_mount(NULL, "0:", 0);
    f_mount(NULL, "1:", 0);

    return (int)fr;
}
</pre>
</div>


<div class="para ref">
<h4>�Q��</h4>
<p><tt><a href="read.html">f_read</a>, <a href="write.html">f_write</a>, <a href="close.html">f_close</a>, <a href="sfile.html">FIL</a>, <a href="sfatfs.html">FATFS</a></tt></p>
</div>

<p class="foot"><a href="../00index_j.html">�߂�</a></p>
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