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filter.c
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325 lines (291 loc) · 6.49 KB
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/* The IGEN simulator generator for GDB, the GNU Debugger.
Copyright 2002-2016 Free Software Foundation, Inc.
Contributed by Andrew Cagney.
This file is part of GDB.
This program 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 of the License, or
(at your option) any later version.
This program 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.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <stdio.h>
#include "config.h"
#ifdef HAVE_STRING_H
#include <string.h>
#else
#ifdef HAVE_STRINGS_H
#include <strings.h>
#endif
#endif
#include "misc.h"
#include "lf.h"
#include "filter.h"
struct _filter
{
char *member;
filter *next;
};
void
filter_parse (filter **filters, const char *filt)
{
while (strlen (filt) > 0)
{
filter *new_filter;
filter **last;
/* break out a member of the filter list */
const char *flag = filt;
unsigned /*size_t */ len;
filt = strchr (filt, ',');
if (filt == NULL)
{
filt = strchr (flag, '\0');
len = strlen (flag);
}
else
{
len = filt - flag;
filt = filt + 1;
}
/* find an insertion point - sorted order */
last = filters;
while (*last != NULL && strncmp (flag, (*last)->member, len) > 0)
last = &(*last)->next;
if (*last != NULL
&& strncmp (flag, (*last)->member, len) == 0
&& strlen ((*last)->member) == len)
continue; /* duplicate */
/* create an entry for that member */
new_filter = ZALLOC (filter);
new_filter->member = NZALLOC (char, len + 1);
strncpy (new_filter->member, flag, len);
/* insert it */
new_filter->next = *last;
*last = new_filter;
}
}
void
filter_add (filter **set, filter *add)
{
while (add != NULL)
{
int cmp;
if (*set == NULL)
cmp = 1; /* set->member > add->member */
else
cmp = strcmp ((*set)->member, add->member);
if (cmp > 0)
{
/* insert it here */
filter *new = ZALLOC (filter);
new->member = NZALLOC (char, strlen (add->member) + 1);
strcpy (new->member, add->member);
new->next = *set;
*set = new;
add = add->next;
}
else if (cmp == 0)
{
/* already in set */
add = add->next;
}
else /* cmp < 0 */
{
/* not reached insertion point */
set = &(*set)->next;
}
}
}
int
filter_is_subset (filter *superset, filter *subset)
{
while (1)
{
int cmp;
if (subset == NULL)
return 1;
if (superset == NULL)
return 0; /* subset isn't finished */
cmp = strcmp (subset->member, superset->member);
if (cmp < 0)
return 0; /* not found */
else if (cmp == 0)
subset = subset->next; /* found */
else if (cmp > 0)
superset = superset->next; /* later in list? */
}
}
int
filter_is_common (filter *l, filter *r)
{
while (1)
{
int cmp;
if (l == NULL)
return 0;
if (r == NULL)
return 0;
cmp = strcmp (l->member, r->member);
if (cmp < 0)
l = l->next;
else if (cmp == 0)
return 1; /* common member */
else if (cmp > 0)
r = r->next;
}
}
int
filter_is_member (filter *filt, const char *flag)
{
int index = 1;
while (filt != NULL)
{
if (strcmp (flag, filt->member) == 0)
return index;
filt = filt->next;
index++;
}
return 0;
}
int
is_filtered_out (filter *filters, const char *flags)
{
while (strlen (flags) > 0)
{
int present;
filter *filt = filters;
/* break the string up */
char *end = strchr (flags, ',');
char *next;
unsigned /*size_t */ len;
if (end == NULL)
{
end = strchr (flags, '\0');
next = end;
}
else
{
next = end + 1;
}
len = end - flags;
/* check that it is present */
present = 0;
filt = filters;
while (filt != NULL)
{
if (strncmp (flags, filt->member, len) == 0
&& strlen (filt->member) == len)
{
present = 1;
break;
}
filt = filt->next;
}
if (!present)
return 1;
flags = next;
}
return 0;
}
char *
filter_next (filter *set, char *member)
{
while (set != NULL)
{
if (strcmp (set->member, member) > 0)
return set->member;
set = set->next;
}
return NULL;
}
void
dump_filter (lf *file, char *prefix, filter *set, char *suffix)
{
char *member;
lf_printf (file, "%s", prefix);
member = filter_next (set, "");
if (member != NULL)
{
while (1)
{
lf_printf (file, "%s", member);
member = filter_next (set, member);
if (member == NULL)
break;
lf_printf (file, ",");
}
}
lf_printf (file, "%s", suffix);
}
#ifdef MAIN
int
main (int argc, char **argv)
{
filter *subset = NULL;
filter *superset = NULL;
lf *l;
int i;
if (argc < 2)
{
printf ("Usage: filter <subset> <filter> ...\n");
exit (1);
}
/* load the filter up */
filter_parse (&subset, argv[1]);
for (i = 2; i < argc; i++)
filter_parse (&superset, argv[i]);
/* dump various info */
l = lf_open ("-", "stdout", lf_omit_references, lf_is_text, "tmp-filter");
/* subset */
{
dump_filter (l, "{", subset, " }");
if (filter_is_subset (superset, subset))
lf_printf (l, " subset of ");
else
lf_printf (l, " !subset of ");
dump_filter (l, "{", superset, " }");
lf_printf (l, "\n");
}
/* intersection */
{
dump_filter (l, "{", subset, " }");
if (filter_is_common (subset, superset))
lf_printf (l, " intersects ");
else
lf_printf (l, " !intersects ");
dump_filter (l, "{", superset, " }");
lf_printf (l, "\n");
}
/* membership */
{
filter *memb = subset;
while (memb != NULL)
{
lf_printf (l, "%s", memb->member);
if (filter_is_member (superset, memb->member))
lf_printf (l, " in ");
else
lf_printf (l, " !in ");
dump_filter (l, "{", superset, " }");
lf_printf (l, "\n");
memb = memb->next;
}
}
/* addition */
{
filter *add = NULL;
filter_add (&add, superset);
filter_add (&add, subset);
dump_filter (l, "{", add, " }");
lf_printf (l, " = ");
dump_filter (l, "{", subset, " }");
lf_printf (l, " + ");
dump_filter (l, "{", superset, " }");
lf_printf (l, "\n");
}
return 0;
}
#endif