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/* This file is part of the program psim.
Copyright (C) 1994-1995,1997, Andrew Cagney <cagney@highland.com.au>
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/>.
*/
#ifndef _CAP_C_
#define _CAP_C_
#include "cap.h"
typedef struct _cap_mapping cap_mapping;
struct _cap_mapping {
unsigned_cell external;
void *internal;
cap_mapping *next;
};
struct _cap {
int nr_mappings;
cap_mapping *mappings;
};
INLINE_CAP\
(cap *)
cap_create(const char *key)
{
return ZALLOC(cap);
}
INLINE_CAP\
(void)
cap_init(cap *db)
{
cap_mapping *current_map = db->mappings;
if (current_map != NULL) {
db->nr_mappings = db->mappings->external;
/* verify that the mappings that were not removed are in sequence
down to nr 1 */
while (current_map->next != NULL) {
if (current_map->external != current_map->next->external + 1)
error("cap: cap database possibly corrupt");
current_map = current_map->next;
}
ASSERT(current_map->next == NULL);
if (current_map->external != 1)
error("cap: cap database possibly currupt");
}
else {
db->nr_mappings = 0;
}
}
INLINE_CAP\
(void *)
cap_internal(cap *db,
signed_cell external)
{
cap_mapping *current_map = db->mappings;
while (current_map != NULL) {
if (current_map->external == external)
return current_map->internal;
current_map = current_map->next;
}
return (void*)0;
}
INLINE_CAP\
(signed_cell)
cap_external(cap *db,
void *internal)
{
cap_mapping *current_map = db->mappings;
while (current_map != NULL) {
if (current_map->internal == internal)
return current_map->external;
current_map = current_map->next;
}
return 0;
}
INLINE_CAP\
(void)
cap_add(cap *db,
void *internal)
{
if (cap_external(db, internal) != 0) {
error("cap: attempting to add an object already in the data base");
}
else {
/* insert at the front making things in decending order */
cap_mapping *new_map = ZALLOC(cap_mapping);
new_map->next = db->mappings;
new_map->internal = internal;
db->nr_mappings += 1;
new_map->external = db->nr_mappings;
db->mappings = new_map;
}
}
INLINE_CAP\
(void)
cap_remove(cap *db,
void *internal)
{
cap_mapping **current_map = &db->mappings;
while (*current_map != NULL) {
if ((*current_map)->internal == internal) {
cap_mapping *delete = *current_map;
*current_map = delete->next;
free(delete);
return;
}
current_map = &(*current_map)->next;
}
error("cap: attempt to remove nonexistant internal object");
}
#endif
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