168 lines
3.2 KiB
C
168 lines
3.2 KiB
C
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/* f4flush.c (c)Copyright Sequiter Software Inc., 1990-1994. All rights reserved. */
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#include "d4all.h"
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#ifdef S4WIN32
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#include <windows.h>
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#endif
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#ifndef S4UNIX
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#ifdef __TURBOC__
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#pragma hdrstop
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#endif
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#endif
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#ifdef __WATCOMC__
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#ifdef M_I386
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#define S4USE_EBX
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#endif
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#endif
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#ifdef S4OS2
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#define S4USE_DUP
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#else
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#ifdef S4UNIX
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#ifndef S4MACINTOSH
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#define S4USE_DUP
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#endif
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#else
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#ifndef S4WIN32
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#include <dos.h>
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#endif
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#endif
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#endif
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/* returns 1 if no handles available */
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int S4FUNCTION file4low_flush( FILE4 *file, int do_free )
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{
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int rc ;
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#ifndef S4OPTIMIZE_OFF
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long real_len ;
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#endif
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#ifdef S4USE_DUP
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int handle ;
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#else
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#ifndef S4MACINTOSH
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#ifndef S4WIN32
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union REGS dos_flush ;
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#endif
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#endif
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#endif
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#ifdef S4MACINTOSH
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short vRefNum ;
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#endif
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#ifdef S4DEBUG
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if ( file == 0 || do_free < 0 || do_free > 1 )
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e4severe( e4parm, E4_F4LOW_FLUSH ) ;
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#endif
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#ifndef S4OPTIMIZE_OFF
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if ( file->do_buffer == 1 )
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{
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rc = opt4file_flush_list( file, opt4file_find_list( file ), do_free ) ;
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if ( file->code_base->opt.write_file == file ) /* flush out the final file changes */
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if ( opt4flush_write_buffer( &file->code_base->opt ) < 0 )
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rc = -1 ;
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if ( file->len != -1 )
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{
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file->do_buffer = 0 ;
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real_len = file->len ;
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if ( file->file_created == 0 )
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{
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#ifdef S4DEBUG
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if ( real_len != 0 )
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e4severe( e4opt, "file4low_flush() uncreate file attempted flush" ) ;
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#endif
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}
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else
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if ( file4len( file ) != real_len ) /* make sure the length is updated */
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file4len_set( file, real_len ) ;
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file->do_buffer = 1 ;
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}
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if ( rc )
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return rc ;
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}
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#endif
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if ( file->hand < 0 ) /* file not open */
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return 0 ;
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#ifdef S4USE_DUP
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#ifndef S4NO_DUP
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handle = dup( file->hand ) ;
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if ( handle < 0 ) /* means that there are no available handles */
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return e4( file->code_base, e4opt_flush, 0 ) ;
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if ( close( handle ) < 0 )
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return e4( file->code_base, e4opt_flush, 0 ) ;
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#endif
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#else
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#ifdef S4MACINTOSH
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if (GetVRefNum( file->hand, &vRefNum ) != 0 )
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return e4( file->code_base, e4opt_flush, 0 ) ;
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if (FlushVol( 0, vRefNum ) != 0 )
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return e4( file->code_base, e4opt_flush, 0 ) ;
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#else
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#ifdef S4WIN32
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if ( !FlushFileBuffers( (HANDLE) file->hand ) )
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return e4( file->code_base, e4opt_flush, 0 ) ;
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#else
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dos_flush.h.ah = 0x68 ;
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#ifdef S4USE_EBX
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dos_flush.x.ebx = file->hand ;
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#else
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dos_flush.x.bx = file->hand ;
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#endif
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intdos( &dos_flush, &dos_flush ) ;
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if ( dos_flush.x.cflag != 0 )
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return e4( file->code_base, e4opt_flush, 0 ) ;
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#endif
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#endif
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#endif
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return 0 ;
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}
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int S4FUNCTION file4flush( FILE4 *file )
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{
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int rc, err ;
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err = e4set( file->code_base, 0 ) ;
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#ifdef S4DEBUG
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if ( file == 0 )
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e4severe( e4parm, E4_F4FLUSH ) ;
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#endif
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rc = file4low_flush( file, 0 ) ;
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if ( err != 0 )
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e4set( file->code_base, err ) ;
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return rc ;
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}
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int S4FUNCTION file4refresh( FILE4 *file )
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{
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#ifndef S4OPTIMIZE_OFF
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#ifndef S4SINGLE
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int rc ;
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#ifdef S4DEBUG
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if ( file == 0 )
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e4severe( e4parm, E4_F4REFRESH ) ;
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#endif
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if ( file->do_buffer == 0 || file->is_exclusive == 1 || file->is_read_only == 1 )
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return 0 ;
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rc = file4low_flush( file, 1 ) ;
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if ( rc < 0 )
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return rc ;
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file->len = -1 ;
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#endif
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#endif
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return 0 ;
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}
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