1 /* Copyright (C) 2002, 2003, 2005 Free Software Foundation, Inc.
2 Contributed by Andy Vaught
4 This file is part of the GNU Fortran 95 runtime library (libgfortran).
6 Libgfortran is free software; you can redistribute it and/or modify
7 it under the terms of the GNU General Public License as published by
8 the Free Software Foundation; either version 2, or (at your option)
11 In addition to the permissions in the GNU General Public License, the
12 Free Software Foundation gives you unlimited permission to link the
13 compiled version of this file into combinations with other programs,
14 and to distribute those combinations without any restriction coming
15 from the use of this file. (The General Public License restrictions
16 do apply in other respects; for example, they cover modification of
17 the file, and distribution when not linked into a combine
20 Libgfortran is distributed in the hope that it will be useful,
21 but WITHOUT ANY WARRANTY; without even the implied warranty of
22 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
23 GNU General Public License for more details.
25 You should have received a copy of the GNU General Public License
26 along with Libgfortran; see the file COPYING. If not, write to
27 the Free Software Foundation, 51 Franklin Street, Fifth Floor,
28 Boston, MA 02110-1301, USA. */
31 /* Implement the non-IOLENGTH variant of the INQUIRY statement */
34 #include "libgfortran.h"
38 static const char undefined
[] = "UNDEFINED";
41 /* inquire_via_unit()-- Inquiry via unit number. The unit might not exist. */
44 inquire_via_unit (st_parameter_inquire
*iqp
, gfc_unit
* u
)
47 GFC_INTEGER_4 cf
= iqp
->common
.flags
;
49 if ((cf
& IOPARM_INQUIRE_HAS_EXIST
) != 0)
50 *iqp
->exist
= iqp
->common
.unit
>= 0;
52 if ((cf
& IOPARM_INQUIRE_HAS_OPENED
) != 0)
53 *iqp
->opened
= (u
!= NULL
);
55 if ((cf
& IOPARM_INQUIRE_HAS_NUMBER
) != 0)
56 *iqp
->number
= (u
!= NULL
) ? u
->unit_number
: -1;
58 if ((cf
& IOPARM_INQUIRE_HAS_NAMED
) != 0)
59 *iqp
->named
= (u
!= NULL
&& u
->flags
.status
!= STATUS_SCRATCH
);
61 if ((cf
& IOPARM_INQUIRE_HAS_NAME
) != 0
62 && u
!= NULL
&& u
->flags
.status
!= STATUS_SCRATCH
)
63 fstrcpy (iqp
->name
, iqp
->name_len
, u
->file
, u
->file_len
);
65 if ((cf
& IOPARM_INQUIRE_HAS_ACCESS
) != 0)
70 switch (u
->flags
.access
)
72 case ACCESS_SEQUENTIAL
:
82 internal_error (&iqp
->common
, "inquire_via_unit(): Bad access");
85 cf_strcpy (iqp
->access
, iqp
->access_len
, p
);
88 if ((cf
& IOPARM_INQUIRE_HAS_SEQUENTIAL
) != 0)
91 p
= inquire_sequential (NULL
, 0);
94 /* disallow an open direct access file to be accessed sequentially */
95 if (u
->flags
.access
== ACCESS_DIRECT
)
98 p
= inquire_sequential (u
->file
, u
->file_len
);
101 cf_strcpy (iqp
->sequential
, iqp
->sequential_len
, p
);
104 if ((cf
& IOPARM_INQUIRE_HAS_DIRECT
) != 0)
106 p
= (u
== NULL
) ? inquire_direct (NULL
, 0) :
107 inquire_direct (u
->file
, u
->file_len
);
109 cf_strcpy (iqp
->direct
, iqp
->direct_len
, p
);
112 if ((cf
& IOPARM_INQUIRE_HAS_FORM
) != 0)
117 switch (u
->flags
.form
)
122 case FORM_UNFORMATTED
:
126 internal_error (&iqp
->common
, "inquire_via_unit(): Bad form");
129 cf_strcpy (iqp
->form
, iqp
->form_len
, p
);
132 if ((cf
& IOPARM_INQUIRE_HAS_FORMATTED
) != 0)
134 p
= (u
== NULL
) ? inquire_formatted (NULL
, 0) :
135 inquire_formatted (u
->file
, u
->file_len
);
137 cf_strcpy (iqp
->formatted
, iqp
->formatted_len
, p
);
140 if ((cf
& IOPARM_INQUIRE_HAS_UNFORMATTED
) != 0)
142 p
= (u
== NULL
) ? inquire_unformatted (NULL
, 0) :
143 inquire_unformatted (u
->file
, u
->file_len
);
145 cf_strcpy (iqp
->unformatted
, iqp
->unformatted_len
, p
);
148 if ((cf
& IOPARM_INQUIRE_HAS_RECL_OUT
) != 0)
149 *iqp
->recl_out
= (u
!= NULL
) ? u
->recl
: 0;
151 if ((cf
& IOPARM_INQUIRE_HAS_STRM_POS_OUT
) != 0)
152 *iqp
->strm_pos_out
= (u
!= NULL
) ? u
->strm_pos
: 0;
154 if ((cf
& IOPARM_INQUIRE_HAS_NEXTREC
) != 0)
155 *iqp
->nextrec
= (u
!= NULL
) ? u
->last_record
+ 1 : 0;
157 if ((cf
& IOPARM_INQUIRE_HAS_BLANK
) != 0)
162 switch (u
->flags
.blank
)
171 internal_error (&iqp
->common
, "inquire_via_unit(): Bad blank");
174 cf_strcpy (iqp
->blank
, iqp
->blank_len
, p
);
177 if ((cf
& IOPARM_INQUIRE_HAS_POSITION
) != 0)
179 if (u
== NULL
|| u
->flags
.access
== ACCESS_DIRECT
)
182 switch (u
->flags
.position
)
184 case POSITION_REWIND
:
187 case POSITION_APPEND
:
194 /* if not direct access, it must be
195 either REWIND, APPEND, or ASIS.
196 ASIS seems to be the best default */
200 cf_strcpy (iqp
->position
, iqp
->position_len
, p
);
203 if ((cf
& IOPARM_INQUIRE_HAS_ACTION
) != 0)
208 switch (u
->flags
.action
)
216 case ACTION_READWRITE
:
220 internal_error (&iqp
->common
, "inquire_via_unit(): Bad action");
223 cf_strcpy (iqp
->action
, iqp
->action_len
, p
);
226 if ((cf
& IOPARM_INQUIRE_HAS_READ
) != 0)
228 p
= (u
== NULL
) ? inquire_read (NULL
, 0) :
229 inquire_read (u
->file
, u
->file_len
);
231 cf_strcpy (iqp
->read
, iqp
->read_len
, p
);
234 if ((cf
& IOPARM_INQUIRE_HAS_WRITE
) != 0)
236 p
= (u
== NULL
) ? inquire_write (NULL
, 0) :
237 inquire_write (u
->file
, u
->file_len
);
239 cf_strcpy (iqp
->write
, iqp
->write_len
, p
);
242 if ((cf
& IOPARM_INQUIRE_HAS_READWRITE
) != 0)
244 p
= (u
== NULL
) ? inquire_readwrite (NULL
, 0) :
245 inquire_readwrite (u
->file
, u
->file_len
);
247 cf_strcpy (iqp
->readwrite
, iqp
->readwrite_len
, p
);
250 if ((cf
& IOPARM_INQUIRE_HAS_DELIM
) != 0)
252 if (u
== NULL
|| u
->flags
.form
!= FORM_FORMATTED
)
255 switch (u
->flags
.delim
)
263 case DELIM_APOSTROPHE
:
267 internal_error (&iqp
->common
, "inquire_via_unit(): Bad delim");
270 cf_strcpy (iqp
->delim
, iqp
->delim_len
, p
);
273 if ((cf
& IOPARM_INQUIRE_HAS_PAD
) != 0)
275 if (u
== NULL
|| u
->flags
.form
!= FORM_FORMATTED
)
278 switch (u
->flags
.pad
)
287 internal_error (&iqp
->common
, "inquire_via_unit(): Bad pad");
290 cf_strcpy (iqp
->pad
, iqp
->pad_len
, p
);
293 if ((cf
& IOPARM_INQUIRE_HAS_CONVERT
) != 0)
298 switch (u
->flags
.convert
)
300 /* l8_to_l4_offset is 0 for little-endian, 1 for big-endian. */
302 p
= l8_to_l4_offset
? "BIG_ENDIAN" : "LITTLE_ENDIAN";
306 p
= l8_to_l4_offset
? "LITTLE_ENDIAN" : "BIG_ENDIAN";
310 internal_error (&iqp
->common
, "inquire_via_unit(): Bad convert");
313 cf_strcpy (iqp
->convert
, iqp
->convert_len
, p
);
318 /* inquire_via_filename()-- Inquiry via filename. This subroutine is
319 * only used if the filename is *not* connected to a unit number. */
322 inquire_via_filename (st_parameter_inquire
*iqp
)
325 GFC_INTEGER_4 cf
= iqp
->common
.flags
;
327 if ((cf
& IOPARM_INQUIRE_HAS_EXIST
) != 0)
328 *iqp
->exist
= file_exists (iqp
->file
, iqp
->file_len
);
330 if ((cf
& IOPARM_INQUIRE_HAS_OPENED
) != 0)
333 if ((cf
& IOPARM_INQUIRE_HAS_NUMBER
) != 0)
336 if ((cf
& IOPARM_INQUIRE_HAS_NAMED
) != 0)
339 if ((cf
& IOPARM_INQUIRE_HAS_NAME
) != 0)
340 fstrcpy (iqp
->name
, iqp
->name_len
, iqp
->file
, iqp
->file_len
);
342 if ((cf
& IOPARM_INQUIRE_HAS_ACCESS
) != 0)
343 cf_strcpy (iqp
->access
, iqp
->access_len
, undefined
);
345 if ((cf
& IOPARM_INQUIRE_HAS_SEQUENTIAL
) != 0)
347 p
= inquire_sequential (iqp
->file
, iqp
->file_len
);
348 cf_strcpy (iqp
->sequential
, iqp
->sequential_len
, p
);
351 if ((cf
& IOPARM_INQUIRE_HAS_DIRECT
) != 0)
353 p
= inquire_direct (iqp
->file
, iqp
->file_len
);
354 cf_strcpy (iqp
->direct
, iqp
->direct_len
, p
);
357 if ((cf
& IOPARM_INQUIRE_HAS_FORM
) != 0)
358 cf_strcpy (iqp
->form
, iqp
->form_len
, undefined
);
360 if ((cf
& IOPARM_INQUIRE_HAS_FORMATTED
) != 0)
362 p
= inquire_formatted (iqp
->file
, iqp
->file_len
);
363 cf_strcpy (iqp
->formatted
, iqp
->formatted_len
, p
);
366 if ((cf
& IOPARM_INQUIRE_HAS_UNFORMATTED
) != 0)
368 p
= inquire_unformatted (iqp
->file
, iqp
->file_len
);
369 cf_strcpy (iqp
->unformatted
, iqp
->unformatted_len
, p
);
372 if ((cf
& IOPARM_INQUIRE_HAS_RECL_OUT
) != 0)
375 if ((cf
& IOPARM_INQUIRE_HAS_NEXTREC
) != 0)
378 if ((cf
& IOPARM_INQUIRE_HAS_BLANK
) != 0)
379 cf_strcpy (iqp
->blank
, iqp
->blank_len
, undefined
);
381 if ((cf
& IOPARM_INQUIRE_HAS_POSITION
) != 0)
382 cf_strcpy (iqp
->position
, iqp
->position_len
, undefined
);
384 if ((cf
& IOPARM_INQUIRE_HAS_ACCESS
) != 0)
385 cf_strcpy (iqp
->access
, iqp
->access_len
, undefined
);
387 if ((cf
& IOPARM_INQUIRE_HAS_READ
) != 0)
389 p
= inquire_read (iqp
->file
, iqp
->file_len
);
390 cf_strcpy (iqp
->read
, iqp
->read_len
, p
);
393 if ((cf
& IOPARM_INQUIRE_HAS_WRITE
) != 0)
395 p
= inquire_write (iqp
->file
, iqp
->file_len
);
396 cf_strcpy (iqp
->write
, iqp
->write_len
, p
);
399 if ((cf
& IOPARM_INQUIRE_HAS_READWRITE
) != 0)
401 p
= inquire_read (iqp
->file
, iqp
->file_len
);
402 cf_strcpy (iqp
->readwrite
, iqp
->readwrite_len
, p
);
405 if ((cf
& IOPARM_INQUIRE_HAS_DELIM
) != 0)
406 cf_strcpy (iqp
->delim
, iqp
->delim_len
, undefined
);
408 if ((cf
& IOPARM_INQUIRE_HAS_PAD
) != 0)
409 cf_strcpy (iqp
->pad
, iqp
->pad_len
, undefined
);
413 /* Library entry point for the INQUIRE statement (non-IOLENGTH
416 extern void st_inquire (st_parameter_inquire
*);
417 export_proto(st_inquire
);
420 st_inquire (st_parameter_inquire
*iqp
)
424 library_start (&iqp
->common
);
426 if ((iqp
->common
.flags
& IOPARM_INQUIRE_HAS_FILE
) == 0)
428 u
= find_unit (iqp
->common
.unit
);
429 inquire_via_unit (iqp
, u
);
433 u
= find_file (iqp
->file
, iqp
->file_len
);
435 inquire_via_filename (iqp
);
437 inquire_via_unit (iqp
, u
);