141 lines
4.2 KiB
C
141 lines
4.2 KiB
C
/* Implement Input/Output runtime actions for CHILL.
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Copyright (C) 1992,1993 Free Software Foundation, Inc.
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Author: Wilfried Moser, et al
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This file is part of GNU CC.
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GNU CC is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU CC is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU CC; see the file COPYING. If not, write to
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the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* As a special exception, if you link this library with other files,
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some of which are compiled with GCC, to produce an executable,
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this library does not by itself cause the resulting executable
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to be covered by the GNU General Public License.
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This exception does not however invalidate any other reasons why
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the executable file might be covered by the GNU General Public License. */
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#include <setjmp.h>
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#include <errno.h>
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#include <string.h>
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#include <unistd.h>
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#include <sys/types.h>
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#include "fileio.h"
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static
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void
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doWrite( Access_Mode* the_access, void* buf, size_t nbyte )
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{
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size_t nwrit;
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nwrit = write( the_access->association->handle, buf, nbyte );
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if( nwrit < nbyte )
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{
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the_access->association->syserrno = errno;
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RWEXCEPTION( WRITEFAIL, OS_IO_ERROR );
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}
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}
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void
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__writerecord( Access_Mode* the_access,
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signed long the_index,
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char* the_val_addr,
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unsigned long the_val_len,
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char* file,
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int line )
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{
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Association_Mode* the_assoc;
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unsigned long info;
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char* actaddr;
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unsigned short actlen;
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off_t filepos;
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if( !the_access )
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CHILLEXCEPTION( file, line, EMPTY, NULL_ACCESS );
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if( !(the_assoc = the_access->association) )
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CHILLEXCEPTION( file, line, NOTCONNECTED, IS_NOT_CONNECTED );
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/* Usage must no be ReadOnly */
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if( the_assoc->usage == ReadOnly )
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CHILLEXCEPTION( file, line, WRITEFAIL, BAD_USAGE );
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/*
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* Positioning
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*/
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if( TEST_FLAG( the_access, IO_INDEXED ) )
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{
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/* index expression must be within bounds of index mode */
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if( the_index < the_access->lowindex
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|| the_access->highindex < the_index )
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CHILLEXCEPTION( file, line, RANGEFAIL, BAD_INDEX );
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filepos = the_access->base +
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(the_index - the_access->lowindex) * the_access->reclength;
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if( lseek( the_assoc->handle, filepos, SEEK_SET ) == -1L )
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CHILLEXCEPTION( file, line, WRITEFAIL, LSEEK_FAILS );
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}
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if( (info = setjmp( __rw_exception )) )
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CHILLEXCEPTION( file, line, info>>16, info & 0xffff );
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if( TEST_FLAG( the_access, IO_TEXTIO ) )
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{
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if( TEST_FLAG( the_access, IO_INDEXED ) )
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{
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int nspace = the_access->reclength - the_val_len;
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memset( the_val_addr + 2 + the_val_len, ' ', nspace );
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actlen = the_access->reclength - 2;
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MOV2(the_val_addr,&actlen);
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doWrite( the_access, the_val_addr, the_access->reclength );
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}
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else
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{
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if( the_assoc->ctl_pre )
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write( the_assoc->handle, &the_assoc->ctl_pre, 1 );
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MOV2(&actlen,the_val_addr);
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write( the_assoc->handle, the_val_addr + 2, actlen );
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if( the_assoc->ctl_post )
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write( the_assoc->handle, &the_assoc->ctl_post, 1 );
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the_assoc->ctl_pre = '\0';
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the_assoc->ctl_post = '\n';
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}
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}
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else
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{
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switch( the_access->rectype )
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{
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case Fixed:
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if( TEST_FLAG( the_assoc, IO_VARIABLE ) )
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{
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actlen = the_access->reclength;
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doWrite( the_access, &actlen, sizeof(actlen) );
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}
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doWrite( the_access, the_val_addr, the_val_len );
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break;
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case VaryingChars:
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MOV2(&actlen,the_val_addr);
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if( actlen > the_access->reclength - 2 )
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CHILLEXCEPTION( file, line, RANGEFAIL, RECORD_TOO_LONG );
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actlen = TEST_FLAG( the_access, IO_INDEXED )
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? the_access->reclength : actlen + 2;
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doWrite( the_access, the_val_addr, actlen );
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break;
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}
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}
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}
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