#include "config.h"
#include <unistd.h>
#include <stdio.h>
#include <string.h>
#include "libgfortran.h"
#include "io.h"
static st_option access_opt[] = {
{"sequential", ACCESS_SEQUENTIAL},
{"direct", ACCESS_DIRECT},
{NULL}
};
static st_option action_opt[] =
{
{ "read", ACTION_READ},
{ "write", ACTION_WRITE},
{ "readwrite", ACTION_READWRITE},
{ NULL}
};
static st_option blank_opt[] =
{
{ "null", BLANK_NULL},
{ "zero", BLANK_ZERO},
{ NULL}
};
static st_option delim_opt[] =
{
{ "none", DELIM_NONE},
{ "apostrophe", DELIM_APOSTROPHE},
{ "quote", DELIM_QUOTE},
{ NULL}
};
static st_option form_opt[] =
{
{ "formatted", FORM_FORMATTED},
{ "unformatted", FORM_UNFORMATTED},
{ NULL}
};
static st_option position_opt[] =
{
{ "asis", POSITION_ASIS},
{ "rewind", POSITION_REWIND},
{ "append", POSITION_APPEND},
{ NULL}
};
static st_option status_opt[] =
{
{ "unknown", STATUS_UNKNOWN},
{ "old", STATUS_OLD},
{ "new", STATUS_NEW},
{ "replace", STATUS_REPLACE},
{ "scratch", STATUS_SCRATCH},
{ NULL}
};
static st_option pad_opt[] =
{
{ "yes", PAD_YES},
{ "no", PAD_NO},
{ NULL}
};
void
test_endfile (gfc_unit * u)
{
if (u->endfile == NO_ENDFILE && file_length (u->s) == file_position (u->s))
u->endfile = AT_ENDFILE;
}
static void
edit_modes (gfc_unit * u, unit_flags * flags)
{
if (flags->status != STATUS_UNSPECIFIED &&
u->flags.status != flags->position)
generate_error (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,
"Cannot change ACCESS parameter in OPEN statement");
if (flags->form != FORM_UNSPECIFIED && u->flags.form != flags->form)
generate_error (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,
"Cannot change RECL parameter in OPEN statement");
if (flags->action != ACTION_UNSPECIFIED && u->flags.access != flags->access)
generate_error (ERROR_BAD_OPTION,
"Cannot change ACTION parameter in OPEN statement");
if (flags->status != STATUS_UNSPECIFIED && flags->status != STATUS_OLD)
generate_error (ERROR_BAD_OPTION,
"OPEN statement must have a STATUS of OLD");
if (u->flags.form == FORM_UNFORMATTED)
{
if (flags->delim != DELIM_UNSPECIFIED)
generate_error (ERROR_OPTION_CONFLICT,
"DELIM parameter conflicts with UNFORMATTED form in "
"OPEN statement");
if (flags->blank != BLANK_UNSPECIFIED)
generate_error (ERROR_OPTION_CONFLICT,
"BLANK parameter conflicts with UNFORMATTED form in "
"OPEN statement");
if (flags->pad != PAD_UNSPECIFIED)
generate_error (ERROR_OPTION_CONFLICT,
"PAD paramter conflicts with UNFORMATTED form in "
"OPEN statement");
}
if (ioparm.library_return == LIBRARY_OK)
{
if (flags->blank != BLANK_UNSPECIFIED)
u->flags.blank = flags->blank;
if (flags->delim != DELIM_UNSPECIFIED)
u->flags.delim = flags->delim;
if (flags->pad != PAD_UNSPECIFIED)
u->flags.pad = flags->pad;
}
switch (flags->position)
{
case POSITION_UNSPECIFIED:
case POSITION_ASIS:
break;
case POSITION_REWIND:
if (sseek (u->s, 0) == FAILURE)
goto seek_error;
u->current_record = 0;
u->last_record = 0;
test_endfile (u);
break;
case POSITION_APPEND:
if (sseek (u->s, file_length (u->s)) == FAILURE)
goto seek_error;
u->current_record = 0;
u->endfile = AT_ENDFILE;
break;
seek_error:
generate_error (ERROR_OS, NULL);
break;
}
}
void
new_unit (unit_flags * flags)
{
gfc_unit *u;
stream *s;
char tmpname[5 + 10 + 1 ];
if (flags->access == ACCESS_UNSPECIFIED)
flags->access = ACCESS_SEQUENTIAL;
if (flags->form == FORM_UNSPECIFIED)
flags->form = (flags->access == ACCESS_SEQUENTIAL)
? FORM_FORMATTED : FORM_UNFORMATTED;
if (flags->delim == DELIM_UNSPECIFIED)
flags->delim = DELIM_NONE;
else
{
if (flags->form == FORM_UNFORMATTED)
{
generate_error (ERROR_OPTION_CONFLICT,
"DELIM parameter conflicts with UNFORMATTED form in "
"OPEN statement");
goto cleanup;
}
}
if (flags->blank == BLANK_UNSPECIFIED)
flags->blank = BLANK_NULL;
else
{
if (flags->form == FORM_UNFORMATTED)
{
generate_error (ERROR_OPTION_CONFLICT,
"BLANK parameter conflicts with UNFORMATTED form in "
"OPEN statement");
goto cleanup;
}
}
if (flags->pad == PAD_UNSPECIFIED)
flags->pad = PAD_YES;
else
{
if (flags->form == FORM_UNFORMATTED)
{
generate_error (ERROR_OPTION_CONFLICT,
"PAD paramter conflicts with UNFORMATTED form in "
"OPEN statement");
goto cleanup;
}
}
if (flags->position != POSITION_ASIS && flags->access == ACCESS_DIRECT)
{
generate_error (ERROR_OPTION_CONFLICT,
"ACCESS parameter conflicts with SEQUENTIAL access in "
"OPEN statement");
goto cleanup;
}
else
if (flags->position == POSITION_UNSPECIFIED)
flags->position = POSITION_ASIS;
if (flags->status == STATUS_UNSPECIFIED)
flags->status = STATUS_UNKNOWN;
if (flags->access == ACCESS_DIRECT && ioparm.recl_in == 0)
{
generate_error (ERROR_MISSING_OPTION,
"Missing RECL parameter in OPEN statement");
goto cleanup;
}
if (ioparm.recl_in != 0 && ioparm.recl_in <= 0)
{
generate_error (ERROR_BAD_OPTION,
"RECL parameter is non-positive in OPEN statement");
goto cleanup;
}
switch (flags->status)
{
case STATUS_SCRATCH:
if (ioparm.file == NULL)
break;
generate_error (ERROR_BAD_OPTION,
"FILE parameter must not be present in OPEN statement");
return;
case STATUS_OLD:
case STATUS_NEW:
case STATUS_REPLACE:
case STATUS_UNKNOWN:
if (ioparm.file != NULL)
break;
ioparm.file = tmpname;
ioparm.file_len = sprintf(ioparm.file, "fort.%d", ioparm.unit);
break;
default:
internal_error ("new_unit(): Bad status");
}
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))
{
generate_error (ERROR_ALREADY_OPEN, NULL);
goto cleanup;
}
s = open_external (flags);
if (s == NULL)
{
generate_error (ERROR_OS, NULL);
goto cleanup;
}
if (flags->status == STATUS_NEW || flags->status == STATUS_REPLACE)
flags->status = STATUS_OLD;
u = get_mem (sizeof (gfc_unit) + ioparm.file_len);
memset (u, '\0', sizeof (gfc_unit) + ioparm.file_len);
u->unit_number = ioparm.unit;
u->s = s;
u->flags = *flags;
if (flags->position == POSITION_APPEND)
{
if (sseek (u->s, file_length (u->s)) == FAILURE)
generate_error (ERROR_OS, NULL);
u->endfile = AT_ENDFILE;
}
u->recl = (ioparm.recl_in != 0) ? ioparm.recl_in : g.max_offset;
u->last_record = 0;
u->current_record = 0;
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;
insert_unit (u);
test_endfile (u);
cleanup:
if (flags->status == STATUS_SCRATCH)
free_mem (ioparm.file);
}
static void
already_open (gfc_unit * u, unit_flags * flags)
{
if (ioparm.file == NULL)
{
edit_modes (u, flags);
return;
}
if (!compare_file_filename (u->s, ioparm.file, ioparm.file_len))
{
if (close_unit (u))
{
generate_error (ERROR_OS, "Error closing file in OPEN statement");
return;
}
new_unit (flags);
return;
}
edit_modes (u, flags);
}
extern void st_open (void);
export_proto(st_open);
void
st_open (void)
{
unit_flags flags;
gfc_unit *u = NULL;
library_start ();
flags.access = (ioparm.access == NULL) ? ACCESS_UNSPECIFIED :
find_option (ioparm.access, ioparm.access_len, access_opt,
"Bad ACCESS 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 = (ioparm.blank == NULL) ? BLANK_UNSPECIFIED :
find_option (ioparm.blank, ioparm.blank_len, blank_opt,
"Bad BLANK 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 = (ioparm.pad == NULL) ? PAD_UNSPECIFIED :
find_option (ioparm.pad, ioparm.pad_len, pad_opt,
"Bad PAD 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 = (ioparm.position == NULL) ? POSITION_UNSPECIFIED :
find_option (ioparm.position, ioparm.position_len, position_opt,
"Bad POSITION 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");
if (ioparm.unit < 0)
generate_error (ERROR_BAD_OPTION, "Bad unit number in OPEN statement");
if (flags.position != POSITION_UNSPECIFIED
&& flags.access == ACCESS_DIRECT)
generate_error (ERROR_BAD_OPTION,
"Cannot use POSITION with direct access files");
if (flags.position == POSITION_UNSPECIFIED)
flags.position = POSITION_ASIS;
if (ioparm.library_return != LIBRARY_OK)
{
library_end ();
return;
}
u = find_unit (ioparm.unit);
if (u == NULL)
new_unit (&flags);
else
already_open (u, &flags);
library_end ();
}