1<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN" "http://www.w3.org/TR/html4/strict.dtd"> 2<html lang="en"> 3<head> 4<meta http-equiv="Content-Type" content="text/html; charset=utf-8"> 5<meta http-equiv="Content-Style-Type" content="text/css"> 6<link rel="stylesheet" href="../css_e.css" type="text/css" media="screen" title="ELM Default"> 7<title>FatFs - f_putc</title> 8</head> 9 10<body> 11 12<div class="para func"> 13<h2>f_putc</h2> 14<p>The f_putc funciton puts a character to the file.</p> 15<pre> 16int f_putc ( 17 TCHAR <span class="arg">chr</span>, <span class="c">/* [IN] A character to write */</span> 18 FIL* <span class="arg">fp</span> <span class="c">/* [IN] File object */</span> 19); 20</pre> 21</div> 22 23<div class="para arg"> 24<h4>Parameters</h4> 25<dl class="par"> 26<dt>chr</dt> 27<dd>A character to write.</dd> 28<dt>fp</dt> 29<dd>Pointer to the open file object structuer.</dd> 30</dl> 31</div> 32 33 34<div class="para ret"> 35<h4>Return Values</h4> 36<p>When the character was written successfuly, it returns number of character encoding units written to the file. When the function failed due to disk full or any error, a negative value will be returned.</p> 37</div> 38 39 40<div class="para desc"> 41<h4>Description</h4> 42<p>When FatFs is configured for Unicode API (<tt><a href="config.html#lfn_unicode">FF_LFN_UNICODE</a> >= 1</tt>), character encoding on the string fuctions, <tt>f_putc</tt>, <tt>f_puts</tt>, <tt>f_printf</tt> and <tt>f_gets</tt> function, is also switched to Unicode. The character encoding <em>on the file</em> to be read/written via those functions is selected by <tt><a href="config.html#strf_encode">FF_STRF_ENCODE</a></tt>. The Unicode characters in multiple encoding unit, such as surrogate pair and multi-byte sequence, cannot be written with this function.</p> 43</div> 44 45<div class="para comp"> 46<h4>QuickInfo</h4> 47<p>This is a wrapper function of <a href="write.html"><tt>f_write</tt></a> function. Available when <tt><a href="config.html#fs_readonly">FF_FS_READONLY</a> == 0</tt> and <tt><a href="config.html#use_strfunc">FF_USE_STRFUNC</a> >= 1</tt>. When <tt>FF_USE_STRFUNC == 2</tt>, a <tt>'\n'</tt> is output as <tt>'\r'+'\n'</tt>.</p> 48</div> 49 50 51<div class="para ref"> 52<h4>See Also</h4> 53<p><tt><a href="open.html">f_open</a>, <a href="puts.html">f_puts</a>, <a href="printf.html">f_printf</a>, <a href="gets.html">f_gets</a>, <a href="close.html">f_close</a>, <a href="sfile.html">FIL</a></tt></p> 54</div> 55 56 57<p class="foot"><a href="../00index_e.html">Return</a></p> 58</body> 59</html> 60