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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgfortran/] [io/] [file_pos.c] - Blame information for rev 867

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/* Copyright (C) 2002-2003, 2005, 2006, 2007, 2009, 2010
   Free Software Foundation, Inc.
   Contributed by Andy Vaught and Janne Blomqvist
 
This file is part of the GNU Fortran runtime library (libgfortran).
 
Libgfortran is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.
 
Libgfortran is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.
 
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
 
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see
<http://www.gnu.org/licenses/>.  */
 
#include "io.h"
#include "fbuf.h"
#include "unix.h"
#include <string.h>
 
/* file_pos.c-- Implement the file positioning statements, i.e. BACKSPACE,
   ENDFILE, and REWIND as well as the FLUSH statement.  */
 
 
/* formatted_backspace(fpp, u)-- Move the file back one line.  The
   current position is after the newline that terminates the previous
   record, and we have to sift backwards to find the newline before
   that or the start of the file, whichever comes first.  */
 
static const int READ_CHUNK = 4096;
 
static void
formatted_backspace (st_parameter_filepos *fpp, gfc_unit *u)
{
  gfc_offset base;
  char p[READ_CHUNK];
  ssize_t n;
 
  base = stell (u->s) - 1;
 
  do
    {
      n = (base < READ_CHUNK) ? base : READ_CHUNK;
      base -= n;
      if (sseek (u->s, base, SEEK_SET) < 0)
        goto io_error;
      if (sread (u->s, p, n) != n)
        goto io_error;
 
      /* We have moved backwards from the current position, it should
         not be possible to get a short read.  Because it is not
         clear what to do about such thing, we ignore the possibility.  */
 
      /* There is no memrchr() in the C library, so we have to do it
         ourselves.  */
 
      while (n > 0)
        {
          n--;
          if (p[n] == '\n')
            {
              base += n + 1;
              goto done;
            }
        }
 
    }
  while (base != 0);
 
  /* base is the new pointer.  Seek to it exactly.  */
 done:
  if (sseek (u->s, base, SEEK_SET) < 0)
    goto io_error;
  u->last_record--;
  u->endfile = NO_ENDFILE;
 
  return;
 
 io_error:
  generate_error (&fpp->common, LIBERROR_OS, NULL);
}
 
 
/* unformatted_backspace(fpp) -- Move the file backwards for an unformatted
   sequential file.  We are guaranteed to be between records on entry and
   we have to shift to the previous record.  Loop over subrecords.  */
 
static void
unformatted_backspace (st_parameter_filepos *fpp, gfc_unit *u)
{
  gfc_offset m, slen;
  GFC_INTEGER_4 m4;
  GFC_INTEGER_8 m8;
  ssize_t length;
  int continued;
  char p[sizeof (GFC_INTEGER_8)];
 
  if (compile_options.record_marker == 0)
    length = sizeof (GFC_INTEGER_4);
  else
    length = compile_options.record_marker;
 
  do
    {
      slen = - (gfc_offset) length;
      if (sseek (u->s, slen, SEEK_CUR) < 0)
        goto io_error;
      if (sread (u->s, p, length) != length)
        goto io_error;
 
      /* Only GFC_CONVERT_NATIVE and GFC_CONVERT_SWAP are valid here.  */
      if (likely (u->flags.convert == GFC_CONVERT_NATIVE))
        {
          switch (length)
            {
            case sizeof(GFC_INTEGER_4):
              memcpy (&m4, p, sizeof (m4));
              m = m4;
              break;
 
            case sizeof(GFC_INTEGER_8):
              memcpy (&m8, p, sizeof (m8));
              m = m8;
              break;
 
            default:
              runtime_error ("Illegal value for record marker");
              break;
            }
        }
      else
        {
          switch (length)
            {
            case sizeof(GFC_INTEGER_4):
              reverse_memcpy (&m4, p, sizeof (m4));
              m = m4;
              break;
 
            case sizeof(GFC_INTEGER_8):
              reverse_memcpy (&m8, p, sizeof (m8));
              m = m8;
              break;
 
            default:
              runtime_error ("Illegal value for record marker");
              break;
            }
 
        }
 
      continued = m < 0;
      if (continued)
        m = -m;
 
      if (sseek (u->s, -m -2 * length, SEEK_CUR) < 0)
        goto io_error;
    } while (continued);
 
  u->last_record--;
  return;
 
 io_error:
  generate_error (&fpp->common, LIBERROR_OS, NULL);
}
 
 
extern void st_backspace (st_parameter_filepos *);
export_proto(st_backspace);
 
void
st_backspace (st_parameter_filepos *fpp)
{
  gfc_unit *u;
 
  library_start (&fpp->common);
 
  u = find_unit (fpp->common.unit);
  if (u == NULL)
    {
      generate_error (&fpp->common, LIBERROR_BAD_UNIT, NULL);
      goto done;
    }
 
  /* Direct access is prohibited, and so is unformatted stream access.  */
 
 
  if (u->flags.access == ACCESS_DIRECT)
    {
      generate_error (&fpp->common, LIBERROR_OPTION_CONFLICT,
                      "Cannot BACKSPACE a file opened for DIRECT access");
      goto done;
    }
 
  if (u->flags.access == ACCESS_STREAM && u->flags.form == FORM_UNFORMATTED)
    {
      generate_error (&fpp->common, LIBERROR_OPTION_CONFLICT,
                      "Cannot BACKSPACE an unformatted stream file");
      goto done;
    }
 
  /* Make sure format buffer is flushed and reset.  */
  if (u->flags.form == FORM_FORMATTED)
    {
      int pos = fbuf_reset (u);
      if (pos != 0)
        sseek (u->s, pos, SEEK_CUR);
    }
 
 
  /* Check for special cases involving the ENDFILE record first.  */
 
  if (u->endfile == AFTER_ENDFILE)
    {
      u->endfile = AT_ENDFILE;
      u->flags.position = POSITION_APPEND;
      sflush (u->s);
    }
  else
    {
      if (stell (u->s) == 0)
        {
          u->flags.position = POSITION_REWIND;
          goto done;            /* Common special case */
        }
 
      if (u->mode == WRITING)
        {
          /* If there are previously written bytes from a write with
             ADVANCE="no", add a record marker before performing the
             BACKSPACE.  */
 
          if (u->previous_nonadvancing_write)
            finish_last_advance_record (u);
 
          u->previous_nonadvancing_write = 0;
 
          unit_truncate (u, stell (u->s), &fpp->common);
          u->mode = READING;
        }
 
      if (u->flags.form == FORM_FORMATTED)
        formatted_backspace (fpp, u);
      else
        unformatted_backspace (fpp, u);
 
      u->flags.position = POSITION_UNSPECIFIED;
      u->endfile = NO_ENDFILE;
      u->current_record = 0;
      u->bytes_left = 0;
    }
 
 done:
  if (u != NULL)
    unlock_unit (u);
 
  library_end ();
}
 
 
extern void st_endfile (st_parameter_filepos *);
export_proto(st_endfile);
 
void
st_endfile (st_parameter_filepos *fpp)
{
  gfc_unit *u;
 
  library_start (&fpp->common);
 
  u = find_unit (fpp->common.unit);
  if (u != NULL)
    {
      if (u->flags.access == ACCESS_DIRECT)
        {
          generate_error (&fpp->common, LIBERROR_OPTION_CONFLICT,
                          "Cannot perform ENDFILE on a file opened "
                          "for DIRECT access");
          goto done;
        }
 
      if (u->flags.access == ACCESS_SEQUENTIAL
          && u->endfile == AFTER_ENDFILE)
        {
          generate_error (&fpp->common, LIBERROR_OPTION_CONFLICT,
                          "Cannot perform ENDFILE on a file already "
                          "positioned after the EOF marker");
          goto done;
        }
 
      /* If there are previously written bytes from a write with ADVANCE="no",
         add a record marker before performing the ENDFILE.  */
 
      if (u->previous_nonadvancing_write)
        finish_last_advance_record (u);
 
      u->previous_nonadvancing_write = 0;
 
      if (u->current_record)
        {
          st_parameter_dt dtp;
          dtp.common = fpp->common;
          memset (&dtp.u.p, 0, sizeof (dtp.u.p));
          dtp.u.p.current_unit = u;
          next_record (&dtp, 1);
        }
 
      unit_truncate (u, stell (u->s), &fpp->common);
      u->endfile = AFTER_ENDFILE;
      if (0 == stell (u->s))
        u->flags.position = POSITION_REWIND;
    }
  else
    {
      if (fpp->common.unit < 0)
        {
          generate_error (&fpp->common, LIBERROR_BAD_OPTION,
                          "Bad unit number in statement");
          return;
        }
 
      u = find_or_create_unit (fpp->common.unit);
      if (u->s == NULL)
        {
          /* Open the unit with some default flags.  */
          st_parameter_open opp;
          unit_flags u_flags;
 
          memset (&u_flags, '\0', sizeof (u_flags));
          u_flags.access = ACCESS_SEQUENTIAL;
          u_flags.action = ACTION_READWRITE;
 
          /* Is it unformatted?  */
          if (!(fpp->common.flags & (IOPARM_DT_HAS_FORMAT | IOPARM_DT_LIST_FORMAT
                                     | IOPARM_DT_IONML_SET)))
            u_flags.form = FORM_UNFORMATTED;
          else
            u_flags.form = FORM_UNSPECIFIED;
 
          u_flags.delim = DELIM_UNSPECIFIED;
          u_flags.blank = BLANK_UNSPECIFIED;
          u_flags.pad = PAD_UNSPECIFIED;
          u_flags.decimal = DECIMAL_UNSPECIFIED;
          u_flags.encoding = ENCODING_UNSPECIFIED;
          u_flags.async = ASYNC_UNSPECIFIED;
          u_flags.round = ROUND_UNSPECIFIED;
          u_flags.sign = SIGN_UNSPECIFIED;
          u_flags.status = STATUS_UNKNOWN;
          u_flags.convert = GFC_CONVERT_NATIVE;
 
          opp.common = fpp->common;
          opp.common.flags &= IOPARM_COMMON_MASK;
          u = new_unit (&opp, u, &u_flags);
          if (u == NULL)
            return;
          u->endfile = AFTER_ENDFILE;
        }
    }
 
  done:
    unlock_unit (u);
 
  library_end ();
}
 
 
extern void st_rewind (st_parameter_filepos *);
export_proto(st_rewind);
 
void
st_rewind (st_parameter_filepos *fpp)
{
  gfc_unit *u;
 
  library_start (&fpp->common);
 
  u = find_unit (fpp->common.unit);
  if (u != NULL)
    {
      if (u->flags.access == ACCESS_DIRECT)
        generate_error (&fpp->common, LIBERROR_BAD_OPTION,
                        "Cannot REWIND a file opened for DIRECT access");
      else
        {
          /* If there are previously written bytes from a write with ADVANCE="no",
             add a record marker before performing the ENDFILE.  */
 
          if (u->previous_nonadvancing_write)
            finish_last_advance_record (u);
 
          u->previous_nonadvancing_write = 0;
 
          fbuf_reset (u);
 
          u->last_record = 0;
 
          if (sseek (u->s, 0, SEEK_SET) < 0)
            generate_error (&fpp->common, LIBERROR_OS, NULL);
 
          /* Set this for compatibilty with g77 for /dev/null.  */
          if (ssize (u->s) == 0)
            u->endfile = AT_ENDFILE;
          else
            {
              /* We are rewinding so we are not at the end.  */
              u->endfile = NO_ENDFILE;
            }
 
          u->current_record = 0;
          u->strm_pos = 1;
          u->read_bad = 0;
        }
      /* Update position for INQUIRE.  */
      u->flags.position = POSITION_REWIND;
      unlock_unit (u);
    }
 
  library_end ();
}
 
 
extern void st_flush (st_parameter_filepos *);
export_proto(st_flush);
 
void
st_flush (st_parameter_filepos *fpp)
{
  gfc_unit *u;
 
  library_start (&fpp->common);
 
  u = find_unit (fpp->common.unit);
  if (u != NULL)
    {
      /* Make sure format buffer is flushed.  */
      if (u->flags.form == FORM_FORMATTED)
        fbuf_flush (u, u->mode);
 
      sflush (u->s);
      unlock_unit (u);
    }
  else
    /* FLUSH on unconnected unit is illegal: F95 std., 9.3.5. */
    generate_error (&fpp->common, LIBERROR_BAD_OPTION,
                        "Specified UNIT in FLUSH is not connected");
 
  library_end ();
}

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[/] [openrisc/] [trunk/] [gnu-dev/] [or1k-gcc/] [libgfortran/] [io/] [file_pos.c] - Blame information for rev 867

Line No.	Rev	Author	Line
1	733	jeremybenn	`/* Copyright (C) 2002-2003, 2005, 2006, 2007, 2009, 2010`
2			`Free Software Foundation, Inc.`
3			`Contributed by Andy Vaught and Janne Blomqvist`
4
5			`This file is part of the GNU Fortran runtime library (libgfortran).`
6
7			`Libgfortran is free software; you can redistribute it and/or modify`
8			`it under the terms of the GNU General Public License as published by`
9			`the Free Software Foundation; either version 3, or (at your option)`
10			`any later version.`
11
12			`Libgfortran is distributed in the hope that it will be useful,`
13			`but WITHOUT ANY WARRANTY; without even the implied warranty of`
14			`MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the`
15			`GNU General Public License for more details.`
16
17			`Under Section 7 of GPL version 3, you are granted additional`
18			`permissions described in the GCC Runtime Library Exception, version`
19			`3.1, as published by the Free Software Foundation.`
20
21			`You should have received a copy of the GNU General Public License and`
22			`a copy of the GCC Runtime Library Exception along with this program;`
23			`see the files COPYING3 and COPYING.RUNTIME respectively. If not, see`
24			`<http://www.gnu.org/licenses/>. */`
25
26			`#include "io.h"`
27			`#include "fbuf.h"`
28			`#include "unix.h"`
29			`#include <string.h>`
30
31			`/* file_pos.c-- Implement the file positioning statements, i.e. BACKSPACE,`
32			`ENDFILE, and REWIND as well as the FLUSH statement. */`
33
34
35			`/* formatted_backspace(fpp, u)-- Move the file back one line. The`
36			`current position is after the newline that terminates the previous`
37			`record, and we have to sift backwards to find the newline before`
38			`that or the start of the file, whichever comes first. */`
39
40			`static const int READ_CHUNK = 4096;`
41
42			`static void`
43			`formatted_backspace (st_parameter_filepos fpp, gfc_unit u)`
44			`{`
45			`gfc_offset base;`
46			`char p[READ_CHUNK];`
47			`ssize_t n;`
48
49			`base = stell (u->s) - 1;`
50
51			`do`
52			`{`
53			`n = (base < READ_CHUNK) ? base : READ_CHUNK;`
54			`base -= n;`
55			`if (sseek (u->s, base, SEEK_SET) < 0)`
56			`goto io_error;`
57			`if (sread (u->s, p, n) != n)`
58			`goto io_error;`
59
60			`/* We have moved backwards from the current position, it should`
61			`not be possible to get a short read. Because it is not`
62			`clear what to do about such thing, we ignore the possibility. */`
63
64			`/* There is no memrchr() in the C library, so we have to do it`
65			`ourselves. */`
66
67			`while (n > 0)`
68			`{`
69			`n--;`
70			`if (p[n] == '\n')`
71			`{`
72			`base += n + 1;`
73			`goto done;`
74			`}`
75			`}`
76
77			`}`
78			`while (base != 0);`
79
80			`/* base is the new pointer. Seek to it exactly. */`
81			`done:`
82			`if (sseek (u->s, base, SEEK_SET) < 0)`
83			`goto io_error;`
84			`u->last_record--;`
85			`u->endfile = NO_ENDFILE;`
86
87			`return;`
88
89			`io_error:`
90			`generate_error (&fpp->common, LIBERROR_OS, NULL);`
91			`}`
92
93
94			`/* unformatted_backspace(fpp) -- Move the file backwards for an unformatted`
95			`sequential file. We are guaranteed to be between records on entry and`
96			`we have to shift to the previous record. Loop over subrecords. */`
97
98			`static void`
99			`unformatted_backspace (st_parameter_filepos fpp, gfc_unit u)`
100			`{`
101			`gfc_offset m, slen;`
102			`GFC_INTEGER_4 m4;`
103			`GFC_INTEGER_8 m8;`
104			`ssize_t length;`
105			`int continued;`
106			`char p[sizeof (GFC_INTEGER_8)];`
107
108			`if (compile_options.record_marker == 0)`
109			`length = sizeof (GFC_INTEGER_4);`
110			`else`
111			`length = compile_options.record_marker;`
112
113			`do`
114			`{`
115			`slen = - (gfc_offset) length;`
116			`if (sseek (u->s, slen, SEEK_CUR) < 0)`
117			`goto io_error;`
118			`if (sread (u->s, p, length) != length)`
119			`goto io_error;`
120
121			`/* Only GFC_CONVERT_NATIVE and GFC_CONVERT_SWAP are valid here. */`
122			`if (likely (u->flags.convert == GFC_CONVERT_NATIVE))`
123			`{`
124			`switch (length)`
125			`{`
126			`case sizeof(GFC_INTEGER_4):`
127			`memcpy (&m4, p, sizeof (m4));`
128			`m = m4;`
129			`break;`
130
131			`case sizeof(GFC_INTEGER_8):`
132			`memcpy (&m8, p, sizeof (m8));`
133			`m = m8;`
134			`break;`
135
136			`default:`
137			`runtime_error ("Illegal value for record marker");`
138			`break;`
139			`}`
140			`}`
141			`else`
142			`{`
143			`switch (length)`
144			`{`
145			`case sizeof(GFC_INTEGER_4):`
146			`reverse_memcpy (&m4, p, sizeof (m4));`
147			`m = m4;`
148			`break;`
149
150			`case sizeof(GFC_INTEGER_8):`
151			`reverse_memcpy (&m8, p, sizeof (m8));`
152			`m = m8;`
153			`break;`
154
155			`default:`
156			`runtime_error ("Illegal value for record marker");`
157			`break;`
158			`}`
159
160			`}`
161
162			`continued = m < 0;`
163			`if (continued)`
164			`m = -m;`
165
166			`if (sseek (u->s, -m -2 * length, SEEK_CUR) < 0)`
167			`goto io_error;`
168			`} while (continued);`
169
170			`u->last_record--;`
171			`return;`
172
173			`io_error:`
174			`generate_error (&fpp->common, LIBERROR_OS, NULL);`
175			`}`
176
177
178			`extern void st_backspace (st_parameter_filepos *);`
179			`export_proto(st_backspace);`
180
181			`void`
182			`st_backspace (st_parameter_filepos *fpp)`
183			`{`
184			`gfc_unit *u;`
185
186			`library_start (&fpp->common);`
187
188			`u = find_unit (fpp->common.unit);`
189			`if (u == NULL)`
190			`{`
191			`generate_error (&fpp->common, LIBERROR_BAD_UNIT, NULL);`
192			`goto done;`
193			`}`
194
195			`/* Direct access is prohibited, and so is unformatted stream access. */`
196
197
198			`if (u->flags.access == ACCESS_DIRECT)`
199			`{`
200			`generate_error (&fpp->common, LIBERROR_OPTION_CONFLICT,`
201			`"Cannot BACKSPACE a file opened for DIRECT access");`
202			`goto done;`
203			`}`
204
205			`if (u->flags.access == ACCESS_STREAM && u->flags.form == FORM_UNFORMATTED)`
206			`{`
207			`generate_error (&fpp->common, LIBERROR_OPTION_CONFLICT,`
208			`"Cannot BACKSPACE an unformatted stream file");`
209			`goto done;`
210			`}`
211
212			`/* Make sure format buffer is flushed and reset. */`
213			`if (u->flags.form == FORM_FORMATTED)`
214			`{`
215			`int pos = fbuf_reset (u);`
216			`if (pos != 0)`
217			`sseek (u->s, pos, SEEK_CUR);`
218			`}`
219
220
221			`/* Check for special cases involving the ENDFILE record first. */`
222
223			`if (u->endfile == AFTER_ENDFILE)`
224			`{`
225			`u->endfile = AT_ENDFILE;`
226			`u->flags.position = POSITION_APPEND;`
227			`sflush (u->s);`
228			`}`
229			`else`
230			`{`
231			`if (stell (u->s) == 0)`
232			`{`
233			`u->flags.position = POSITION_REWIND;`
234			`goto done; /* Common special case */`
235			`}`
236
237			`if (u->mode == WRITING)`
238			`{`
239			`/* If there are previously written bytes from a write with`
240			`ADVANCE="no", add a record marker before performing the`
241			`BACKSPACE. */`
242
243			`if (u->previous_nonadvancing_write)`
244			`finish_last_advance_record (u);`
245
246			`u->previous_nonadvancing_write = 0;`
247
248			`unit_truncate (u, stell (u->s), &fpp->common);`
249			`u->mode = READING;`
250			`}`
251
252			`if (u->flags.form == FORM_FORMATTED)`
253			`formatted_backspace (fpp, u);`
254			`else`
255			`unformatted_backspace (fpp, u);`
256
257			`u->flags.position = POSITION_UNSPECIFIED;`
258			`u->endfile = NO_ENDFILE;`
259			`u->current_record = 0;`
260			`u->bytes_left = 0;`
261			`}`
262
263			`done:`
264			`if (u != NULL)`
265			`unlock_unit (u);`
266
267			`library_end ();`
268			`}`
269
270
271			`extern void st_endfile (st_parameter_filepos *);`
272			`export_proto(st_endfile);`
273
274			`void`
275			`st_endfile (st_parameter_filepos *fpp)`
276			`{`
277			`gfc_unit *u;`
278
279			`library_start (&fpp->common);`
280
281			`u = find_unit (fpp->common.unit);`
282			`if (u != NULL)`
283			`{`
284			`if (u->flags.access == ACCESS_DIRECT)`
285			`{`
286			`generate_error (&fpp->common, LIBERROR_OPTION_CONFLICT,`
287			`"Cannot perform ENDFILE on a file opened "`
288			`"for DIRECT access");`
289			`goto done;`
290			`}`
291
292			`if (u->flags.access == ACCESS_SEQUENTIAL`
293			`&& u->endfile == AFTER_ENDFILE)`
294			`{`
295			`generate_error (&fpp->common, LIBERROR_OPTION_CONFLICT,`
296			`"Cannot perform ENDFILE on a file already "`
297			`"positioned after the EOF marker");`
298			`goto done;`
299			`}`
300
301			`/* If there are previously written bytes from a write with ADVANCE="no",`
302			`add a record marker before performing the ENDFILE. */`
303
304			`if (u->previous_nonadvancing_write)`
305			`finish_last_advance_record (u);`
306
307			`u->previous_nonadvancing_write = 0;`
308
309			`if (u->current_record)`
310			`{`
311			`st_parameter_dt dtp;`
312			`dtp.common = fpp->common;`
313			`memset (&dtp.u.p, 0, sizeof (dtp.u.p));`
314			`dtp.u.p.current_unit = u;`
315			`next_record (&dtp, 1);`
316			`}`
317
318			`unit_truncate (u, stell (u->s), &fpp->common);`
319			`u->endfile = AFTER_ENDFILE;`
320			`if (0 == stell (u->s))`
321			`u->flags.position = POSITION_REWIND;`
322			`}`
323			`else`
324			`{`
325			`if (fpp->common.unit < 0)`
326			`{`
327			`generate_error (&fpp->common, LIBERROR_BAD_OPTION,`
328			`"Bad unit number in statement");`
329			`return;`
330			`}`
331
332			`u = find_or_create_unit (fpp->common.unit);`
333			`if (u->s == NULL)`
334			`{`
335			`/* Open the unit with some default flags. */`
336			`st_parameter_open opp;`
337			`unit_flags u_flags;`
338
339			`memset (&u_flags, '\0', sizeof (u_flags));`
340			`u_flags.access = ACCESS_SEQUENTIAL;`
341			`u_flags.action = ACTION_READWRITE;`
342
343			`/* Is it unformatted? */`
344			`if (!(fpp->common.flags & (IOPARM_DT_HAS_FORMAT \| IOPARM_DT_LIST_FORMAT`
345			`\| IOPARM_DT_IONML_SET)))`
346			`u_flags.form = FORM_UNFORMATTED;`
347			`else`
348			`u_flags.form = FORM_UNSPECIFIED;`
349
350			`u_flags.delim = DELIM_UNSPECIFIED;`
351			`u_flags.blank = BLANK_UNSPECIFIED;`
352			`u_flags.pad = PAD_UNSPECIFIED;`
353			`u_flags.decimal = DECIMAL_UNSPECIFIED;`
354			`u_flags.encoding = ENCODING_UNSPECIFIED;`
355			`u_flags.async = ASYNC_UNSPECIFIED;`
356			`u_flags.round = ROUND_UNSPECIFIED;`
357			`u_flags.sign = SIGN_UNSPECIFIED;`
358			`u_flags.status = STATUS_UNKNOWN;`
359			`u_flags.convert = GFC_CONVERT_NATIVE;`
360
361			`opp.common = fpp->common;`
362			`opp.common.flags &= IOPARM_COMMON_MASK;`
363			`u = new_unit (&opp, u, &u_flags);`
364			`if (u == NULL)`
365			`return;`
366			`u->endfile = AFTER_ENDFILE;`
367			`}`
368			`}`
369
370			`done:`
371			`unlock_unit (u);`
372
373			`library_end ();`
374			`}`
375
376
377			`extern void st_rewind (st_parameter_filepos *);`
378			`export_proto(st_rewind);`
379
380			`void`
381			`st_rewind (st_parameter_filepos *fpp)`
382			`{`
383			`gfc_unit *u;`
384
385			`library_start (&fpp->common);`
386
387			`u = find_unit (fpp->common.unit);`
388			`if (u != NULL)`
389			`{`
390			`if (u->flags.access == ACCESS_DIRECT)`
391			`generate_error (&fpp->common, LIBERROR_BAD_OPTION,`
392			`"Cannot REWIND a file opened for DIRECT access");`
393			`else`
394			`{`
395			`/* If there are previously written bytes from a write with ADVANCE="no",`
396			`add a record marker before performing the ENDFILE. */`
397
398			`if (u->previous_nonadvancing_write)`
399			`finish_last_advance_record (u);`
400
401			`u->previous_nonadvancing_write = 0;`
402
403			`fbuf_reset (u);`
404
405			`u->last_record = 0;`
406
407			`if (sseek (u->s, 0, SEEK_SET) < 0)`
408			`generate_error (&fpp->common, LIBERROR_OS, NULL);`
409
410			`/* Set this for compatibilty with g77 for /dev/null. */`
411			`if (ssize (u->s) == 0)`
412			`u->endfile = AT_ENDFILE;`
413			`else`
414			`{`
415			`/* We are rewinding so we are not at the end. */`
416			`u->endfile = NO_ENDFILE;`
417			`}`
418
419			`u->current_record = 0;`
420			`u->strm_pos = 1;`
421			`u->read_bad = 0;`
422			`}`
423			`/* Update position for INQUIRE. */`
424			`u->flags.position = POSITION_REWIND;`
425			`unlock_unit (u);`
426			`}`
427
428			`library_end ();`
429			`}`
430
431
432			`extern void st_flush (st_parameter_filepos *);`
433			`export_proto(st_flush);`
434
435			`void`
436			`st_flush (st_parameter_filepos *fpp)`
437			`{`
438			`gfc_unit *u;`
439
440			`library_start (&fpp->common);`
441
442			`u = find_unit (fpp->common.unit);`
443			`if (u != NULL)`
444			`{`
445			`/* Make sure format buffer is flushed. */`
446			`if (u->flags.form == FORM_FORMATTED)`
447			`fbuf_flush (u, u->mode);`
448
449			`sflush (u->s);`
450			`unlock_unit (u);`
451			`}`
452			`else`
453			`/* FLUSH on unconnected unit is illegal: F95 std., 9.3.5. */`
454			`generate_error (&fpp->common, LIBERROR_BAD_OPTION,`
455			`"Specified UNIT in FLUSH is not connected");`
456
457			`library_end ();`
458			`}`