fseek.c - scc - simple c99 compiler
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       ---
       fseek.c (455B)
       ---
            1 #include <stdio.h>
            2 
            3 #include "../syscall.h"
            4 #include "../libc.h"
            5 
            6 #undef fseek
            7 
            8 int
            9 fseek(FILE *fp, long off, int whence)
           10 {
           11         if (fp->flags & _IOERR)
           12                 return EOF;
           13 
           14         if ((fp->flags & _IOWRITE) && _flsbuf(fp))
           15                 return -1;
           16         else if (whence == SEEK_CUR && (fp->flags & _IOREAD))
           17                 off -= fp->wp - fp->rp;
           18 
           19         if (_lseek(fp->fd, off, whence) < 0)
           20                 return EOF;
           21 
           22         if (fp->flags & _IORW)
           23                 fp->flags &= ~(_IOREAD | _IOWRITE);
           24         fp->flags &= ~_IOEOF;
           25 
           26         return 0;
           27 }