| 0,0 → 1,143 |
|---|
| /* |
| * 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 |