1/* Implement Input/Output runtime actions for CHILL.
2   Copyright (C) 1992,1993 Free Software Foundation, Inc.
3   Author: Wilfried Moser, et al
4
5This file is part of GNU CC.
6
7GNU CC is free software; you can redistribute it and/or modify
8it under the terms of the GNU General Public License as published by
9the Free Software Foundation; either version 2, or (at your option)
10any later version.
11
12GNU CC is distributed in the hope that it will be useful,
13but WITHOUT ANY WARRANTY; without even the implied warranty of
14MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
15GNU General Public License for more details.
16
17You should have received a copy of the GNU General Public License
18along with GNU CC; see the file COPYING.  If not, write to
19the Free Software Foundation, 59 Temple Place - Suite 330,
20Boston, MA 02111-1307, USA.  */
21
22/* As a special exception, if you link this library with other files,
23   some of which are compiled with GCC, to produce an executable,
24   this library does not by itself cause the resulting executable
25   to be covered by the GNU General Public License.
26   This exception does not however invalidate any other reasons why
27   the executable file might be covered by the GNU General Public License.  */
28
29#include <setjmp.h>
30#include <errno.h>
31#include <string.h>
32#include <unistd.h>
33#include <sys/types.h>
34
35#include "fileio.h"
36
37static
38void
39doWrite( Access_Mode* the_access, void* buf, size_t nbyte )
40{
41  size_t nwrit;
42
43  nwrit = write( the_access->association->handle, buf, nbyte );
44
45  if( nwrit < nbyte )
46  {
47    the_access->association->syserrno = errno;
48    RWEXCEPTION( WRITEFAIL, OS_IO_ERROR );
49  }
50}
51
52
53void
54__writerecord( Access_Mode*  the_access,
55               signed long   the_index,
56               char*         the_val_addr,
57               unsigned long the_val_len,
58               char*         file,
59               int           line )
60
61{
62  Association_Mode* the_assoc;
63  unsigned long  info;
64  char*          actaddr;
65  unsigned short actlen;
66  off_t          filepos;
67
68  if( !the_access )
69    CHILLEXCEPTION( file, line, EMPTY, NULL_ACCESS );
70
71  if( !(the_assoc = the_access->association) )
72    CHILLEXCEPTION( file, line, NOTCONNECTED, IS_NOT_CONNECTED );
73
74  /* Usage must no be ReadOnly */
75  if( the_assoc->usage == ReadOnly )
76    CHILLEXCEPTION( file, line, WRITEFAIL, BAD_USAGE );
77
78  /*
79   *  Positioning
80   */
81  if( TEST_FLAG( the_access, IO_INDEXED ) )
82  {
83    /* index expression must be within bounds of index mode */
84    if( the_index < the_access->lowindex
85        || the_access->highindex < the_index )
86      CHILLEXCEPTION( file, line, RANGEFAIL, BAD_INDEX );
87    filepos = the_access->base +
88              (the_index - the_access->lowindex) * the_access->reclength;
89
90    if( lseek( the_assoc->handle, filepos, SEEK_SET ) == -1L )
91      CHILLEXCEPTION( file, line, WRITEFAIL, LSEEK_FAILS );
92  }
93
94  if( (info = setjmp( __rw_exception )) )
95    CHILLEXCEPTION( file, line, info>>16, info & 0xffff );
96
97  if( TEST_FLAG( the_access, IO_TEXTIO ) )
98  {
99    if( TEST_FLAG( the_access, IO_INDEXED ) )
100    {
101      int nspace = the_access->reclength - the_val_len;
102      memset( the_val_addr + 2 + the_val_len, ' ', nspace );
103      actlen = the_access->reclength - 2;
104      MOV2(the_val_addr,&actlen);
105      doWrite( the_access, the_val_addr, the_access->reclength );
106    }
107    else
108    {
109      if( the_assoc->ctl_pre )
110	write( the_assoc->handle, &the_assoc->ctl_pre, 1 );
111      MOV2(&actlen,the_val_addr);
112      write( the_assoc->handle, the_val_addr + 2, actlen );
113      if( the_assoc->ctl_post )
114	write( the_assoc->handle, &the_assoc->ctl_post, 1 );
115      the_assoc->ctl_pre  = '\0';
116      the_assoc->ctl_post = '\n';
117    }
118  }
119  else
120  {
121    switch( the_access->rectype )
122    {
123    case Fixed:
124      if( TEST_FLAG( the_assoc, IO_VARIABLE ) )
125      {
126        actlen = the_access->reclength;
127        doWrite( the_access, &actlen, sizeof(actlen) );
128      }
129      doWrite( the_access, the_val_addr, the_val_len );
130      break;
131    case VaryingChars:
132      MOV2(&actlen,the_val_addr);
133      if( actlen > the_access->reclength - 2 )
134        CHILLEXCEPTION( file, line, RANGEFAIL, RECORD_TOO_LONG );
135      actlen = TEST_FLAG( the_access, IO_INDEXED )
136               ? the_access->reclength : actlen + 2;
137      doWrite( the_access, the_val_addr, actlen );
138      break;
139    }
140  }
141}
142