mirror of
https://github.com/autc04/Retro68.git
synced 2024-12-02 18:53:22 +00:00
144 lines
3.7 KiB
C
144 lines
3.7 KiB
C
/*
|
|
* Copyright (c) 1990 The Regents of the University of California.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms are permitted
|
|
* provided that the above copyright notice and this paragraph are
|
|
* duplicated in all such forms and that any documentation,
|
|
* advertising materials, and other materials related to such
|
|
* distribution and use acknowledge that the software was developed
|
|
* by the University of California, Berkeley. The name of the
|
|
* University may not be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
|
|
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
|
|
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
|
|
*/
|
|
|
|
/*
|
|
FUNCTION
|
|
<<fwrite>>---write array elements
|
|
|
|
INDEX
|
|
fwrite
|
|
INDEX
|
|
_fwrite_r
|
|
|
|
ANSI_SYNOPSIS
|
|
#include <stdio.h>
|
|
size_t fwrite(const void *<[buf]>, size_t <[size]>,
|
|
size_t <[count]>, FILE *<[fp]>);
|
|
|
|
#include <stdio.h>
|
|
size_t _fwrite_r(struct _reent *<[ptr]>, const void *<[buf]>, size_t <[size]>,
|
|
size_t <[count]>, FILE *<[fp]>);
|
|
|
|
TRAD_SYNOPSIS
|
|
#include <stdio.h>
|
|
size_t fwrite(<[buf]>, <[size]>, <[count]>, <[fp]>)
|
|
char *<[buf]>;
|
|
size_t <[size]>;
|
|
size_t <[count]>;
|
|
FILE *<[fp]>;
|
|
|
|
#include <stdio.h>
|
|
size_t _fwrite_r(<[ptr]>, <[buf]>, <[size]>, <[count]>, <[fp]>)
|
|
struct _reent *<[ptr]>;
|
|
char *<[buf]>;
|
|
size_t <[size]>;
|
|
size_t <[count]>;
|
|
FILE *<[fp]>;
|
|
|
|
DESCRIPTION
|
|
<<fwrite>> attempts to copy, starting from the memory location
|
|
<[buf]>, <[count]> elements (each of size <[size]>) into the file or
|
|
stream identified by <[fp]>. <<fwrite>> may copy fewer elements than
|
|
<[count]> if an error intervenes.
|
|
|
|
<<fwrite>> also advances the file position indicator (if any) for
|
|
<[fp]> by the number of @emph{characters} actually written.
|
|
|
|
<<_fwrite_r>> is simply the reentrant version of <<fwrite>> that
|
|
takes an additional reentrant structure argument: <[ptr]>.
|
|
|
|
RETURNS
|
|
If <<fwrite>> succeeds in writing all the elements you specify, the
|
|
result is the same as the argument <[count]>. In any event, the
|
|
result is the number of complete elements that <<fwrite>> copied to
|
|
the file.
|
|
|
|
PORTABILITY
|
|
ANSI C requires <<fwrite>>.
|
|
|
|
Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
|
|
<<lseek>>, <<read>>, <<sbrk>>, <<write>>.
|
|
*/
|
|
|
|
#if defined(LIBC_SCCS) && !defined(lint)
|
|
static char sccsid[] = "%W% (Berkeley) %G%";
|
|
#endif /* LIBC_SCCS and not lint */
|
|
|
|
#include <_ansi.h>
|
|
#include <stdio.h>
|
|
#include <string.h>
|
|
#if 0
|
|
#include <sys/stdc.h>
|
|
#endif
|
|
#include "local.h"
|
|
#if 1
|
|
#include "fvwrite.h"
|
|
#endif
|
|
|
|
/*
|
|
* Write `count' objects (each size `size') from memory to the given file.
|
|
* Return the number of whole objects written.
|
|
*/
|
|
|
|
size_t
|
|
_DEFUN(_fwrite_r, (ptr, buf, size, count, fp),
|
|
struct _reent * ptr _AND
|
|
_CONST _PTR buf _AND
|
|
size_t size _AND
|
|
size_t count _AND
|
|
FILE * fp)
|
|
{
|
|
size_t n;
|
|
struct __suio uio;
|
|
struct __siov iov;
|
|
|
|
iov.iov_base = buf;
|
|
uio.uio_resid = iov.iov_len = n = count * size;
|
|
uio.uio_iov = &iov;
|
|
uio.uio_iovcnt = 1;
|
|
|
|
/*
|
|
* The usual case is success (__sfvwrite_r returns 0);
|
|
* skip the divide if this happens, since divides are
|
|
* generally slow and since this occurs whenever size==0.
|
|
*/
|
|
|
|
CHECK_INIT(ptr, fp);
|
|
|
|
_flockfile (fp);
|
|
ORIENT (fp, -1);
|
|
if (__sfvwrite_r (ptr, fp, &uio) == 0)
|
|
{
|
|
_funlockfile (fp);
|
|
return count;
|
|
}
|
|
_funlockfile (fp);
|
|
return (n - uio.uio_resid) / size;
|
|
}
|
|
|
|
#ifndef _REENT_ONLY
|
|
size_t
|
|
_DEFUN(fwrite, (buf, size, count, fp),
|
|
_CONST _PTR buf _AND
|
|
size_t size _AND
|
|
size_t count _AND
|
|
FILE * fp)
|
|
{
|
|
return _fwrite_r (_REENT, buf, size, count, fp);
|
|
}
|
|
#endif
|