-/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 2002, 2003, 2004, 2005
+ Free Software Foundation, Inc.
Contributed by Andy Vaught
This file is part of the GNU Fortran 95 runtime library (libgfortran).
You should have received a copy of the GNU General Public License
along with Libgfortran; see the file COPYING. If not, write to
-the Free Software Foundation, 59 Temple Place - Suite 330,
-Boston, MA 02111-1307, USA. */
+the Free Software Foundation, 51 Franklin Street, Fifth Floor,
+Boston, MA 02110-1301, USA. */
#include "config.h"
#include <unistd.h>
#include "io.h"
-static st_option access_opt[] = {
+static const st_option access_opt[] = {
{"sequential", ACCESS_SEQUENTIAL},
{"direct", ACCESS_DIRECT},
- {NULL}
+ {"append", ACCESS_APPEND},
+ {NULL, 0}
};
-static st_option action_opt[] =
+static const st_option action_opt[] =
{
{ "read", ACTION_READ},
{ "write", ACTION_WRITE},
{ "readwrite", ACTION_READWRITE},
- { NULL}
+ { NULL, 0}
};
-static st_option blank_opt[] =
+static const st_option blank_opt[] =
{
{ "null", BLANK_NULL},
{ "zero", BLANK_ZERO},
- { NULL}
+ { NULL, 0}
};
-static st_option delim_opt[] =
+static const st_option delim_opt[] =
{
{ "none", DELIM_NONE},
{ "apostrophe", DELIM_APOSTROPHE},
{ "quote", DELIM_QUOTE},
- { NULL}
+ { NULL, 0}
};
-static st_option form_opt[] =
+static const st_option form_opt[] =
{
{ "formatted", FORM_FORMATTED},
{ "unformatted", FORM_UNFORMATTED},
- { NULL}
+ { NULL, 0}
};
-static st_option position_opt[] =
+static const st_option position_opt[] =
{
{ "asis", POSITION_ASIS},
{ "rewind", POSITION_REWIND},
{ "append", POSITION_APPEND},
- { NULL}
+ { NULL, 0}
};
-static st_option status_opt[] =
+static const st_option status_opt[] =
{
{ "unknown", STATUS_UNKNOWN},
{ "old", STATUS_OLD},
{ "new", STATUS_NEW},
{ "replace", STATUS_REPLACE},
{ "scratch", STATUS_SCRATCH},
- { NULL}
+ { NULL, 0}
};
-static st_option pad_opt[] =
+static const st_option pad_opt[] =
{
{ "yes", PAD_YES},
{ "no", PAD_NO},
- { NULL}
+ { NULL, 0}
};
+static const st_option convert_opt[] =
+{
+ { "native", CONVERT_NATIVE},
+ { "swap", CONVERT_SWAP},
+ { "big_endian", CONVERT_BIG},
+ { "little_endian", CONVERT_LITTLE},
+ { NULL, 0}
+};
/* Given a unit, test to see if the file is positioned at the terminal
point, and if so, change state from NO_ENDFILE flag to AT_ENDFILE.
changed. */
static void
-edit_modes (gfc_unit * u, unit_flags * flags)
+edit_modes (st_parameter_open *opp, gfc_unit * u, unit_flags * flags)
{
/* Complain about attempts to change the unchangeable. */
if (flags->status != STATUS_UNSPECIFIED &&
- u->flags.status != flags->position)
- generate_error (ERROR_BAD_OPTION,
+ u->flags.status != flags->status)
+ generate_error (&opp->common, ERROR_BAD_OPTION,
"Cannot change STATUS parameter in OPEN statement");
if (flags->access != ACCESS_UNSPECIFIED && u->flags.access != flags->access)
- generate_error (ERROR_BAD_OPTION,
+ generate_error (&opp->common, ERROR_BAD_OPTION,
"Cannot change ACCESS parameter in OPEN statement");
if (flags->form != FORM_UNSPECIFIED && u->flags.form != flags->form)
- generate_error (ERROR_BAD_OPTION,
+ generate_error (&opp->common, ERROR_BAD_OPTION,
"Cannot change FORM parameter in OPEN statement");
- if (ioparm.recl_in != 0 && ioparm.recl_in != u->recl)
- generate_error (ERROR_BAD_OPTION,
+ if ((opp->common.flags & IOPARM_OPEN_HAS_RECL_IN)
+ && opp->recl_in != u->recl)
+ generate_error (&opp->common, ERROR_BAD_OPTION,
"Cannot change RECL parameter in OPEN statement");
- if (flags->action != ACTION_UNSPECIFIED && u->flags.access != flags->access)
- generate_error (ERROR_BAD_OPTION,
+ if (flags->action != ACTION_UNSPECIFIED && u->flags.action != flags->action)
+ generate_error (&opp->common, ERROR_BAD_OPTION,
"Cannot change ACTION parameter in OPEN statement");
/* Status must be OLD if present. */
- if (flags->status != STATUS_UNSPECIFIED && flags->status != STATUS_OLD)
- generate_error (ERROR_BAD_OPTION,
- "OPEN statement must have a STATUS of OLD");
+ if (flags->status != STATUS_UNSPECIFIED && flags->status != STATUS_OLD &&
+ flags->status != STATUS_UNKNOWN)
+ generate_error (&opp->common, ERROR_BAD_OPTION,
+ "OPEN statement must have a STATUS of OLD or UNKNOWN");
if (u->flags.form == FORM_UNFORMATTED)
{
if (flags->delim != DELIM_UNSPECIFIED)
- generate_error (ERROR_OPTION_CONFLICT,
+ generate_error (&opp->common, ERROR_OPTION_CONFLICT,
"DELIM parameter conflicts with UNFORMATTED form in "
"OPEN statement");
if (flags->blank != BLANK_UNSPECIFIED)
- generate_error (ERROR_OPTION_CONFLICT,
+ generate_error (&opp->common, ERROR_OPTION_CONFLICT,
"BLANK parameter conflicts with UNFORMATTED form in "
"OPEN statement");
if (flags->pad != PAD_UNSPECIFIED)
- generate_error (ERROR_OPTION_CONFLICT,
+ generate_error (&opp->common, ERROR_OPTION_CONFLICT,
"PAD paramter conflicts with UNFORMATTED form in "
"OPEN statement");
}
- if (ioparm.library_return == LIBRARY_OK)
+ if ((opp->common.flags & IOPARM_LIBRETURN_MASK) == IOPARM_LIBRETURN_OK)
{
/* Change the changeable: */
if (flags->blank != BLANK_UNSPECIFIED)
break;
seek_error:
- generate_error (ERROR_OS, NULL);
+ generate_error (&opp->common, ERROR_OS, NULL);
break;
}
+
+ unlock_unit (u);
}
/* Open an unused unit. */
-void
-new_unit (unit_flags * flags)
+gfc_unit *
+new_unit (st_parameter_open *opp, gfc_unit *u, unit_flags * flags)
{
- gfc_unit *u;
+ gfc_unit *u2;
stream *s;
char tmpname[5 /* fort. */ + 10 /* digits of unit number */ + 1 /* 0 */];
{
if (flags->form == FORM_UNFORMATTED)
{
- generate_error (ERROR_OPTION_CONFLICT,
+ generate_error (&opp->common, ERROR_OPTION_CONFLICT,
"DELIM parameter conflicts with UNFORMATTED form in "
"OPEN statement");
- goto cleanup;
+ goto fail;
}
}
{
if (flags->form == FORM_UNFORMATTED)
{
- generate_error (ERROR_OPTION_CONFLICT,
+ generate_error (&opp->common, ERROR_OPTION_CONFLICT,
"BLANK parameter conflicts with UNFORMATTED form in "
"OPEN statement");
- goto cleanup;
+ goto fail;
}
}
{
if (flags->form == FORM_UNFORMATTED)
{
- generate_error (ERROR_OPTION_CONFLICT,
+ generate_error (&opp->common, ERROR_OPTION_CONFLICT,
"PAD paramter conflicts with UNFORMATTED form in "
"OPEN statement");
- goto cleanup;
+ goto fail;
}
}
if (flags->position != POSITION_ASIS && flags->access == ACCESS_DIRECT)
{
- generate_error (ERROR_OPTION_CONFLICT,
+ generate_error (&opp->common, ERROR_OPTION_CONFLICT,
"ACCESS parameter conflicts with SEQUENTIAL access in "
"OPEN statement");
- goto cleanup;
+ goto fail;
}
else
if (flags->position == POSITION_UNSPECIFIED)
/* Checks. */
- if (flags->access == ACCESS_DIRECT && ioparm.recl_in == 0)
+ if (flags->access == ACCESS_DIRECT
+ && (opp->common.flags & IOPARM_OPEN_HAS_RECL_IN) == 0)
{
- generate_error (ERROR_MISSING_OPTION,
+ generate_error (&opp->common, ERROR_MISSING_OPTION,
"Missing RECL parameter in OPEN statement");
- goto cleanup;
+ goto fail;
}
- if (ioparm.recl_in != 0 && ioparm.recl_in <= 0)
+ if ((opp->common.flags & IOPARM_OPEN_HAS_RECL_IN) && opp->recl_in <= 0)
{
- generate_error (ERROR_BAD_OPTION,
+ generate_error (&opp->common, ERROR_BAD_OPTION,
"RECL parameter is non-positive in OPEN statement");
- goto cleanup;
+ goto fail;
}
switch (flags->status)
{
case STATUS_SCRATCH:
- if (ioparm.file == NULL)
- break;
+ if ((opp->common.flags & IOPARM_OPEN_HAS_FILE) == 0)
+ {
+ opp->file = NULL;
+ break;
+ }
- generate_error (ERROR_BAD_OPTION,
+ generate_error (&opp->common, ERROR_BAD_OPTION,
"FILE parameter must not be present in OPEN statement");
- return;
+ goto fail;
case STATUS_OLD:
case STATUS_NEW:
case STATUS_REPLACE:
case STATUS_UNKNOWN:
- if (ioparm.file != NULL)
+ if ((opp->common.flags & IOPARM_OPEN_HAS_FILE))
break;
- ioparm.file = tmpname;
- ioparm.file_len = sprintf(ioparm.file, "fort.%d", ioparm.unit);
+ opp->file = tmpname;
+ opp->file_len = sprintf(opp->file, "fort.%d", opp->common.unit);
break;
default:
- internal_error ("new_unit(): Bad status");
+ internal_error (&opp->common, "new_unit(): Bad status");
}
/* Make sure the file isn't already open someplace else.
Do not error if opening file preconnected to stdin, stdout, stderr. */
- u = find_file ();
- if (u != NULL
- && (options.stdin_unit < 0 || u->unit_number != options.stdin_unit)
- && (options.stdout_unit < 0 || u->unit_number != options.stdout_unit)
- && (options.stderr_unit < 0 || u->unit_number != options.stderr_unit))
+ u2 = NULL;
+ if ((opp->common.flags & IOPARM_OPEN_HAS_FILE) != 0)
+ u2 = find_file (opp->file, opp->file_len);
+ if (u2 != NULL
+ && (options.stdin_unit < 0 || u2->unit_number != options.stdin_unit)
+ && (options.stdout_unit < 0 || u2->unit_number != options.stdout_unit)
+ && (options.stderr_unit < 0 || u2->unit_number != options.stderr_unit))
{
- generate_error (ERROR_ALREADY_OPEN, NULL);
+ unlock_unit (u2);
+ generate_error (&opp->common, ERROR_ALREADY_OPEN, NULL);
goto cleanup;
}
+ if (u2 != NULL)
+ unlock_unit (u2);
+
/* Open file. */
- s = open_external (flags);
+ s = open_external (opp, flags);
if (s == NULL)
{
- generate_error (ERROR_OS, NULL);
+ generate_error (&opp->common, ERROR_OS, NULL);
goto cleanup;
}
/* Create the unit structure. */
- u = get_mem (sizeof (gfc_unit) + ioparm.file_len);
-
- u->unit_number = ioparm.unit;
+ u->file = get_mem (opp->file_len);
+ if (u->unit_number != opp->common.unit)
+ internal_error (&opp->common, "Unit number changed");
u->s = s;
u->flags = *flags;
+ u->read_bad = 0;
+ u->endfile = NO_ENDFILE;
+ u->last_record = 0;
+ u->current_record = 0;
+ u->mode = READING;
+ u->maxrec = 0;
+ u->bytes_left = 0;
+
+ if (flags->position == POSITION_APPEND)
+ {
+ if (sseek (u->s, file_length (u->s)) == FAILURE)
+ generate_error (&opp->common, ERROR_OS, NULL);
+ u->endfile = AT_ENDFILE;
+ }
/* Unspecified recl ends up with a processor dependent value. */
- u->recl = (ioparm.recl_in != 0) ? ioparm.recl_in : g.max_offset;
- u->last_record = 0;
- u->current_record = 0;
+ if ((opp->common.flags & IOPARM_OPEN_HAS_RECL_IN))
+ u->recl = opp->recl_in;
+ else
+ {
+ switch (compile_options.record_marker)
+ {
+ case 0:
+ u->recl = max_offset;
+ break;
+
+ case sizeof (GFC_INTEGER_4):
+ u->recl = GFC_INTEGER_4_HUGE;
+ break;
+
+ case sizeof (GFC_INTEGER_8):
+ u->recl = max_offset;
+ break;
+
+ default:
+ runtime_error ("Illegal value for record marker");
+ break;
+ }
+ }
/* If the file is direct access, calculate the maximum record number
via a division now instead of letting the multiplication overflow
later. */
if (flags->access == ACCESS_DIRECT)
- u->maxrec = g.max_offset / u->recl;
-
- memmove (u->file, ioparm.file, ioparm.file_len);
- u->file_len = ioparm.file_len;
+ u->maxrec = max_offset / u->recl;
- insert_unit (u);
+ memmove (u->file, opp->file, opp->file_len);
+ u->file_len = opp->file_len;
- /* The file is now connected. Errors after this point leave the
- file connected. Curiously, the standard requires that the
+ /* Curiously, the standard requires that the
position specifier be ignored for new files so a newly connected
file starts out that the initial point. We still need to figure
out if the file is at the end or not. */
test_endfile (u);
+ if (flags->status == STATUS_SCRATCH && opp->file != NULL)
+ free_mem (opp->file);
+ return u;
+
cleanup:
/* Free memory associated with a temporary filename. */
- if (flags->status == STATUS_SCRATCH)
- free_mem (ioparm.file);
+ if (flags->status == STATUS_SCRATCH && opp->file != NULL)
+ free_mem (opp->file);
+
+ fail:
+
+ close_unit (u);
+ return NULL;
}
modes or closing what is there now and opening the new file. */
static void
-already_open (gfc_unit * u, unit_flags * flags)
+already_open (st_parameter_open *opp, gfc_unit * u, unit_flags * flags)
{
- if (ioparm.file == NULL)
+ if ((opp->common.flags & IOPARM_OPEN_HAS_FILE) == 0)
{
- edit_modes (u, flags);
+ edit_modes (opp, u, flags);
return;
}
/* If the file is connected to something else, close it and open a
new unit. */
- if (!compare_file_filename (u->s, ioparm.file, ioparm.file_len))
+ if (!compare_file_filename (u, opp->file, opp->file_len))
{
- if (close_unit (u))
+#if !HAVE_UNLINK_OPEN_FILE
+ char *path = NULL;
+ if (u->file && u->flags.status == STATUS_SCRATCH)
+ {
+ path = (char *) gfc_alloca (u->file_len + 1);
+ unpack_filename (path, u->file, u->file_len);
+ }
+#endif
+
+ if (sclose (u->s) == FAILURE)
{
- generate_error (ERROR_OS, "Error closing file in OPEN statement");
+ unlock_unit (u);
+ generate_error (&opp->common, ERROR_OS,
+ "Error closing file in OPEN statement");
return;
}
- new_unit (flags);
+ u->s = NULL;
+ if (u->file)
+ free_mem (u->file);
+ u->file = NULL;
+ u->file_len = 0;
+
+#if !HAVE_UNLINK_OPEN_FILE
+ if (path != NULL)
+ unlink (path);
+#endif
+
+ u = new_unit (opp, u, flags);
+ if (u != NULL)
+ unlock_unit (u);
return;
}
- edit_modes (u, flags);
+ edit_modes (opp, u, flags);
}
/* Open file. */
-extern void st_open (void);
+extern void st_open (st_parameter_open *opp);
export_proto(st_open);
void
-st_open (void)
+st_open (st_parameter_open *opp)
{
unit_flags flags;
gfc_unit *u = NULL;
+ GFC_INTEGER_4 cf = opp->common.flags;
+ unit_convert conv;
- library_start ();
+ library_start (&opp->common);
/* Decode options. */
- flags.access = (ioparm.access == NULL) ? ACCESS_UNSPECIFIED :
- find_option (ioparm.access, ioparm.access_len, access_opt,
- "Bad ACCESS parameter in OPEN statement");
+ flags.access = !(cf & IOPARM_OPEN_HAS_ACCESS) ? ACCESS_UNSPECIFIED :
+ find_option (&opp->common, opp->access, opp->access_len,
+ access_opt, "Bad ACCESS parameter in OPEN statement");
+
+ flags.action = !(cf & IOPARM_OPEN_HAS_ACTION) ? ACTION_UNSPECIFIED :
+ find_option (&opp->common, opp->action, opp->action_len,
+ action_opt, "Bad ACTION parameter in OPEN statement");
- flags.action = (ioparm.action == NULL) ? ACTION_UNSPECIFIED :
- find_option (ioparm.action, ioparm.action_len, action_opt,
- "Bad ACTION parameter in OPEN statement");
+ flags.blank = !(cf & IOPARM_OPEN_HAS_BLANK) ? BLANK_UNSPECIFIED :
+ find_option (&opp->common, opp->blank, opp->blank_len,
+ blank_opt, "Bad BLANK parameter in OPEN statement");
- flags.blank = (ioparm.blank == NULL) ? BLANK_UNSPECIFIED :
- find_option (ioparm.blank, ioparm.blank_len, blank_opt,
- "Bad BLANK parameter in OPEN statement");
+ flags.delim = !(cf & IOPARM_OPEN_HAS_DELIM) ? DELIM_UNSPECIFIED :
+ find_option (&opp->common, opp->delim, opp->delim_len,
+ delim_opt, "Bad DELIM parameter in OPEN statement");
- flags.delim = (ioparm.delim == NULL) ? DELIM_UNSPECIFIED :
- find_option (ioparm.delim, ioparm.delim_len, delim_opt,
- "Bad DELIM parameter in OPEN statement");
+ flags.pad = !(cf & IOPARM_OPEN_HAS_PAD) ? PAD_UNSPECIFIED :
+ find_option (&opp->common, opp->pad, opp->pad_len,
+ pad_opt, "Bad PAD parameter in OPEN statement");
- flags.pad = (ioparm.pad == NULL) ? PAD_UNSPECIFIED :
- find_option (ioparm.pad, ioparm.pad_len, pad_opt,
- "Bad PAD parameter in OPEN statement");
+ flags.form = !(cf & IOPARM_OPEN_HAS_FORM) ? FORM_UNSPECIFIED :
+ find_option (&opp->common, opp->form, opp->form_len,
+ form_opt, "Bad FORM parameter in OPEN statement");
- flags.form = (ioparm.form == NULL) ? FORM_UNSPECIFIED :
- find_option (ioparm.form, ioparm.form_len, form_opt,
- "Bad FORM parameter in OPEN statement");
+ flags.position = !(cf & IOPARM_OPEN_HAS_POSITION) ? POSITION_UNSPECIFIED :
+ find_option (&opp->common, opp->position, opp->position_len,
+ position_opt, "Bad POSITION parameter in OPEN statement");
- flags.position = (ioparm.position == NULL) ? POSITION_UNSPECIFIED :
- find_option (ioparm.position, ioparm.position_len, position_opt,
- "Bad POSITION parameter in OPEN statement");
+ flags.status = !(cf & IOPARM_OPEN_HAS_STATUS) ? STATUS_UNSPECIFIED :
+ find_option (&opp->common, opp->status, opp->status_len,
+ status_opt, "Bad STATUS parameter in OPEN statement");
- flags.status = (ioparm.status == NULL) ? STATUS_UNSPECIFIED :
- find_option (ioparm.status, ioparm.status_len, status_opt,
- "Bad STATUS parameter in OPEN statement");
+ /* First, we check wether the convert flag has been set via environment
+ variable. This overrides the convert tag in the open statement. */
- if (ioparm.unit < 0)
- generate_error (ERROR_BAD_OPTION, "Bad unit number in OPEN statement");
+ conv = get_unformatted_convert (opp->common.unit);
+
+ if (conv == CONVERT_NONE)
+ {
+ /* Nothing has been set by environment variable, check the convert tag. */
+ if (cf & IOPARM_OPEN_HAS_CONVERT)
+ conv = find_option (&opp->common, opp->convert, opp->convert_len,
+ convert_opt,
+ "Bad CONVERT parameter in OPEN statement");
+ else
+ conv = compile_options.convert;
+ }
+
+ /* We use l8_to_l4_offset, which is 0 on little-endian machines
+ and 1 on big-endian machines. */
+ switch (conv)
+ {
+ case CONVERT_NATIVE:
+ case CONVERT_SWAP:
+ break;
+
+ case CONVERT_BIG:
+ conv = l8_to_l4_offset ? CONVERT_NATIVE : CONVERT_SWAP;
+ break;
+
+ case CONVERT_LITTLE:
+ conv = l8_to_l4_offset ? CONVERT_SWAP : CONVERT_NATIVE;
+ break;
+
+ default:
+ internal_error (&opp->common, "Illegal value for CONVERT");
+ break;
+ }
+
+ flags.convert = conv;
+
+ if (opp->common.unit < 0)
+ generate_error (&opp->common, ERROR_BAD_OPTION,
+ "Bad unit number in OPEN statement");
if (flags.position != POSITION_UNSPECIFIED
&& flags.access == ACCESS_DIRECT)
- generate_error (ERROR_BAD_OPTION,
+ generate_error (&opp->common, ERROR_BAD_OPTION,
"Cannot use POSITION with direct access files");
+ if (flags.access == ACCESS_APPEND)
+ {
+ if (flags.position != POSITION_UNSPECIFIED
+ && flags.position != POSITION_APPEND)
+ generate_error (&opp->common, ERROR_BAD_OPTION,
+ "Conflicting ACCESS and POSITION flags in"
+ " OPEN statement");
+
+ notify_std (GFC_STD_GNU,
+ "Extension: APPEND as a value for ACCESS in OPEN statement");
+ flags.access = ACCESS_SEQUENTIAL;
+ flags.position = POSITION_APPEND;
+ }
+
if (flags.position == POSITION_UNSPECIFIED)
flags.position = POSITION_ASIS;
- if (ioparm.library_return != LIBRARY_OK)
- {
- library_end ();
- return;
- }
-
- u = find_unit (ioparm.unit);
+ if ((opp->common.flags & IOPARM_LIBRETURN_MASK) == IOPARM_LIBRETURN_OK)
+ {
+ u = find_or_create_unit (opp->common.unit);
- if (u == NULL)
- new_unit (&flags);
- else
- already_open (u, &flags);
+ if (u->s == NULL)
+ {
+ u = new_unit (opp, u, &flags);
+ if (u != NULL)
+ unlock_unit (u);
+ }
+ else
+ already_open (opp, u, &flags);
+ }
library_end ();
}
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