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       _flsbuf.c - scc - simple c99 compiler
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       ---
       _flsbuf.c (313B)
       ---
            1 #include <errno.h>
            2 #include <stdio.h>
            3 
            4 #include "../libc.h"
            5 #include "../syscall.h"
            6 
            7 int
            8 _flsbuf(FILE *fp)
            9 {
           10         size_t cnt;
           11 
           12         if (fp->flags&_IOREAD)
           13                 return 0;
           14 
           15         cnt = fp->wp - fp->buf;
           16         if (cnt > 0 && _write(fp->fd, fp->buf, cnt) != cnt) {
           17                 fp->flags |= _IOERR;
           18                 return EOF;
           19         }
           20         fp->wp = fp->buf;
           21 
           22         return 0;
           23 }