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[smlnj] View of /sml/trunk/src/runtime/c-libs/posix-io/writebuf.c
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View of /sml/trunk/src/runtime/c-libs/posix-io/writebuf.c

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Revision 224 - (download) (as text) (annotate)
Sat Apr 17 16:27:01 1999 UTC (21 years, 3 months ago) by monnier
File size: 836 byte(s)
This commit was generated by cvs2svn to compensate for changes in r223,
which included commits to RCS files with non-trunk default branches.
/* writebuf.c
 *
 * COPYRIGHT (c) 1995 by AT&T Bell Laboratories.
 */

#include "ml-unixdep.h"
#include <unistd.h>
#include "ml-base.h"
#include "ml-objects.h"
#include "ml-c.h"
#include "cfun-proto-list.h"

/* _ml_P_IO_writebuf : (int * Word8Array.array * int * int) -> int
 *                      fd     data              nbytes start              
 *
 * Write nbytes of data from the given array to the specified file, 
 * starting at the given offset. Assume bounds have been checked.
 */
ml_val_t _ml_P_IO_writebuf (ml_state_t *msp, ml_val_t arg)
{
    int		fd = REC_SELINT(arg, 0);
    ml_val_t	start = REC_SEL(arg, 1);
    size_t	nbytes = REC_SELINT(arg, 2);
    char	*data = STR_MLtoC(start) + REC_SELINT(arg, 3);
    ssize_t    	n;

    n = write (fd, data, nbytes);

    CHK_RETURN (msp, n)

} /* end of _ml_P_IO_writebuf */


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