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| /**************************************************************************** |
| * |
| * Open Watcom Project |
| * |
| * Portions Copyright (c) 1983-2002 Sybase, Inc. All Rights Reserved. |
| * |
| * ======================================================================== |
| * |
| * This file contains Original Code and/or Modifications of Original |
| * Code as defined in and that are subject to the Sybase Open Watcom |
| * Public License version 1.0 (the 'License'). You may not use this file |
| * except in compliance with the License. BY USING THIS FILE YOU AGREE TO |
| * ALL TERMS AND CONDITIONS OF THE LICENSE. A copy of the License is |
| * provided with the Original Code and Modifications, and is also |
| * available at www.sybase.com/developer/opensource. |
| * |
| * The Original Code and all software distributed under the License are |
| * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER |
| * EXPRESS OR IMPLIED, AND SYBASE AND ALL CONTRIBUTORS HEREBY DISCLAIM |
| * ALL SUCH WARRANTIES, INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF |
| * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR |
| * NON-INFRINGEMENT. Please see the License for the specific language |
| * governing rights and limitations under the License. |
| * |
| * ======================================================================== |
| * |
| * Description: Platform independent fwrite() implementation. |
| * |
| ****************************************************************************/ |
| |
| |
| #include "variety.h" |
| #include <stdio.h> |
| #include <unistd.h> |
| #include <errno.h> |
| #include <string.h> |
| #include "fileacc.h" |
| #include "rtdata.h" |
| #include "seterrno.h" |
| #include "qwrite.h" |
| #include "flush.h" |
| #include "streamio.h" |
| |
| |
| _WCRTLINK size_t fwrite( const void *buf, size_t size, size_t n, FILE *fp ) |
| { |
| size_t count; |
| unsigned oflag; |
| |
| _ValidFile( fp, 0 ); |
| _AccessFile( fp ); |
| if( (fp->_flag & _WRITE) == 0 ) { |
| __set_errno( EBADF ); |
| fp->_flag |= _SFERR; |
| _ReleaseFile( fp ); |
| return( 0 ); /* POSIX says return 0 */ |
| } |
| n *= size; |
| if( n == 0 ) { |
| _ReleaseFile( fp ); |
| return( n ); |
| } |
| if( _FP_BASE(fp) == NULL ) { |
| __ioalloc( fp ); /* allocate buffer */ |
| } |
| oflag = fp->_flag & (_SFERR | _EOF); /* JBS 27-jan-92 */ |
| fp->_flag &= ~(_SFERR | _EOF); /* JBS 27-jan-92 */ |
| count = 0; |
| #if !defined( __UNIX__ ) |
| if( fp->_flag & _BINARY ) { /* binary I/O */ |
| #else |
| { |
| #endif |
| size_t bytes_left = n, bytes; |
| |
| do { |
| /* if our buffer is empty, and user's buffer is larger, |
| then write directly from user's buffer. 28-apr-90 */ |
| |
| if( fp->_cnt == 0 && bytes_left >= fp->_bufsize ) { |
| bytes = bytes_left & -512; /* multiple of 512 */ |
| if( bytes == 0 ) { |
| bytes = bytes_left; /* bufsize < 512 */ |
| } |
| n = __qwrite( fileno( fp ), buf, bytes ); |
| if( n == -1 ) { |
| fp->_flag |= _SFERR; |
| } |
| #if !defined( __UNIX__ ) |
| else if( n == 0 ) { |
| _RWD_errno = ENOSPC; |
| fp->_flag |= _SFERR; |
| } |
| #endif |
| bytes = n; |
| } else { |
| bytes = fp->_bufsize - fp->_cnt; |
| if( bytes > bytes_left ) { |
| bytes = bytes_left; |
| } |
| memcpy( fp->_ptr, buf, bytes ); |
| fp->_ptr += bytes; |
| fp->_cnt += bytes; |
| fp->_flag |= _DIRTY; |
| if( (fp->_cnt == fp->_bufsize) || (fp->_flag & _IONBF) ) { |
| __flush(fp); |
| } |
| } |
| buf = ((const char *)buf) + bytes; |
| count += bytes; |
| bytes_left -= bytes; |
| } while( bytes_left && !ferror( fp ) ); |
| #if !defined( __UNIX__ ) |
| } else { /* text I/O */ |
| const char *bufptr; |
| int not_buffered; |
| #ifndef __NETWARE__ |
| int old_orientation; |
| #endif |
| /* temporarily enable buffering saving the previous setting */ |
| not_buffered = 0; |
| if( fp->_flag & _IONBF ) { |
| not_buffered = 1; |
| fp->_flag &= ~_IONBF; |
| fp->_flag |= _IOFBF; |
| } |
| |
| /*** Use fputc, and make it think the stream is byte-oriented ***/ |
| #ifndef __NETWARE__ |
| old_orientation = _FP_ORIENTATION(fp); |
| _FP_ORIENTATION(fp) = _BYTE_ORIENTED; |
| #endif |
| bufptr = (const char *)buf; |
| do { |
| fputc( *(bufptr++), fp ); |
| if( fp->_flag & (_EOF | _SFERR) ) break; |
| ++count; |
| } while( count != n ); |
| #ifndef __NETWARE__ |
| _FP_ORIENTATION(fp) = old_orientation; |
| #endif |
| |
| if( not_buffered ) { /* if wasn't buffered, then reset */ |
| fp->_flag &= ~_IOFBF; |
| fp->_flag |= _IONBF; |
| __flush( fp ); |
| } |
| #endif |
| } |
| if( fp->_flag & _SFERR ) { |
| /* |
| * Quantum 11-17-92 Temporary buffering confuses the return |
| * value if the call is interrupted. |
| * kludge: return 0 on error |
| */ |
| count = 0; |
| } |
| fp->_flag |= oflag; /* JBS 27-jan-92 */ |
| _ReleaseFile( fp ); |
| return( count / size ); |
| } |