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| <title>FatFs - f_printf</title> | |
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| <div class="para"> | |
| <h2>f_printf</h2> | |
| <p>The f_printf function writes formatted string to the file.</p> | |
| <pre> | |
| int f_printf ( | |
| FIL* <em>FileObject</em>, /* File object */ | |
| const char* <em>Foramt</em>, /* Format stirng */ | |
| ... | |
| ); | |
| </pre> | |
| </div> | |
| <div class="para"> | |
| <h4>Parameters</h4> | |
| <dl class="par"> | |
| <dt>FileObject</dt> | |
| <dd>Pointer to the open file object structure.</dd> | |
| <dt>Format</dt> | |
| <dd>Pointer to the null-terminated format string.</dd> | |
| <dt>...</dt> | |
| <dd>Optional arguments.</dd> | |
| </dl> | |
| </div> | |
| <div class="para"> | |
| <h4>Return Values</h4> | |
| <p>When the function succeeded, number of characters written is returned. When the function failed due to disk full or any error, an <tt>EOF</tt> will be returned.</p> | |
| </div> | |
| <div class="para"> | |
| <h4>Description</h4> | |
| <p>The f_printf() is a wrapper function of <a href="putc.html">f_putc()</a> and <a href="puts.html">f_puts()</a>. The format control directive is a sub-set of standard library shown as follos:</p> | |
| <ul> | |
| <li>Type: <tt>c s d u X</tt></li> | |
| <li>Size: <tt>l</tt></li> | |
| <li>Flag: <tt>0</tt></li> | |
| </ul> | |
| </div> | |
| <div class="para"> | |
| <h4>QuickInfo</h4> | |
| <p>Available when <tt>_FS_READONLY == 0</tt> and <tt>_USE_STRFUNC</tt> is 1 or 2. When it is set to 2, <tt>'\n'</tt>s contained in the output are converted to <tt>"\r\n"</tt>.</p> | |
| </div> | |
| <div class="para"> | |
| <h4>Example</h4> | |
| <pre> | |
| f_printf(&fil, "%6d", -200); /* " -200" */ | |
| f_printf(&fil, "%02u", 5); /* "05" */ | |
| f_printf(&fil, "%ld", 12345678L); /* "12345678" */ | |
| f_printf(&fil, "%08lX", 1194684UL); /* "00123ABC" */ | |
| f_printf(&fil, "%s", "String"); /* "String" */ | |
| f_printf(&fil, "%c", 'a'); /* "a" */ | |
| </pre> | |
| </div> | |
| <div class="para"> | |
| <h4>See Also</h4> | |
| <p><tt><a href="open.html">f_open</a>, <a href="putc.html">f_putc</a>, <a href="puts.html">f_puts</a>, <a href="gets.html">f_gets</a>, <a href="close.html">f_close</a>, <a href="sfile.html">FIL</a></tt></p> | |
| </div> | |
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