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Implemented line-oriented buffering for std output

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git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@3606 42af7a65-404d-4744-a932-0658087f49c3
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patacongo 2011-05-14 15:21:04 +00:00
parent fde6683752
commit f70900a811
1 changed files with 7 additions and 0 deletions
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7
Documentation/NuttxPortingGuide.html
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@ -3413,6 +3413,13 @@ build
<code>CONFIG_STDIO_BUFFER_SIZE</code>: Size of the buffer to allocate
on fopen. (Only if CONFIG_NFILE_STREAMS > 0)
</li>
<li>
<code>CONFIG_STDIO_LINEBUFFER</code>:
If standard C buffered I/O is enabled (<code>CONFIG_STDIO_BUFFER_SIZE</code> > 0),
then this option may be added to force automatic, line-oriented flushing the output buffer
for <code>printf()</code> >, <code>fprintf()</code> >, and <code>vfprintf()</code> >.
When a newline character is encountered in the format string, the output buffer will be flushed.
This (slightly) increases the NuttX footprint but supports the kind of behavior that people expect for printf.
<li>
<code>CONFIG_NUNGET_CHARS</code>: Number of characters that can be
buffered by ungetc() (Only if CONFIG_NFILE_STREAMS > 0)