9os

Experimental kernel using plan9 ideas for embedded device
git clone git://git.simple-cc.org/9os
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putc.c (126B)

      1 #include <stdio.h>
      2 #undef putc
      3 
      4 int
      5 putc(int ch, FILE *fp)
      6 {
      7 	return (fp->wp >= fp->rp) ? __putc(ch,fp) : (*fp->wp++ = ch);
      8 }