/*
* Portions Copyright (C) 2004, 2005, 2007 Internet Systems Consortium, Inc. ("ISC")
* Portions Copyright (C) 2001 Internet Software Consortium.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NOMINUM DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*
* Portions Copyright (C) 2001 Nominum, Inc.
*
* Permission to use, copy, modify, and/or distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND ISC AND NOMINUM DISCLAIMS ALL
* WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL ISC BE LIABLE FOR ANY
* SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: alist.c,v 1.8 2007/08/28 07:20:43 tbox Exp $ */
/*! \file */
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <isccc/alist.h>
#include <isc/assertions.h>
#include <isccc/result.h>
#include <isccc/sexpr.h>
#include <isccc/util.h>
#define CAR(s) (s)->value.as_dottedpair.car
#define CDR(s) (s)->value.as_dottedpair.cdr
#define ALIST_TAG "*alist*"
#define MAX_INDENT 64
static char spaces[MAX_INDENT + 1] =
" ";
isccc_sexpr_t *
isccc_alist_create(void)
{
isccc_sexpr_t *alist, *tag;
tag = isccc_sexpr_fromstring(ALIST_TAG);
if (tag == NULL)
return (NULL);
alist = isccc_sexpr_cons(tag, NULL);
if (alist == NULL) {
isccc_sexpr_free(&tag);
return (NULL);
}
return (alist);
}
isc_boolean_t
isccc_alist_alistp(isccc_sexpr_t *alist)
{
isccc_sexpr_t *car;
if (alist == NULL || alist->type != ISCCC_SEXPRTYPE_DOTTEDPAIR)
return (ISC_FALSE);
car = CAR(alist);
if (car == NULL || car->type != ISCCC_SEXPRTYPE_STRING)
return (ISC_FALSE);
if (strcmp(car->value.as_string, ALIST_TAG) != 0)
return (ISC_FALSE);
return (ISC_TRUE);
}
isc_boolean_t
isccc_alist_emptyp(isccc_sexpr_t *alist)
{
REQUIRE(isccc_alist_alistp(alist));
if (CDR(alist) == NULL)
return (ISC_TRUE);
return (ISC_FALSE);
}
isccc_sexpr_t *
isccc_alist_first(isccc_sexpr_t *alist)
{
REQUIRE(isccc_alist_alistp(alist));
return (CDR(alist));
}
isccc_sexpr_t *
isccc_alist_assq(isccc_sexpr_t *alist, const char *key)
{
isccc_sexpr_t *car, *caar;
REQUIRE(isccc_alist_alistp(alist));
/*
* Skip alist type tag.
*/
alist = CDR(alist);
while (alist != NULL) {
INSIST(alist->type == ISCCC_SEXPRTYPE_DOTTEDPAIR);
car = CAR(alist);
INSIST(car->type == ISCCC_SEXPRTYPE_DOTTEDPAIR);
caar = CAR(car);
if (caar->type == ISCCC_SEXPRTYPE_STRING &&
strcmp(caar->value.as_string, key) == 0)
return (car);
alist = CDR(alist);
}
return (NULL);
}
void
isccc_alist_delete(isccc_sexpr_t *alist, const char *key)
{
isccc_sexpr_t *car, *caar, *rest, *prev;
REQUIRE(isccc_alist_alistp(alist));
prev = alist;
rest = CDR(alist);
while (rest != NULL) {
INSIST(rest->type == ISCCC_SEXPRTYPE_DOTTEDPAIR);
car = CAR(rest);
INSIST(car != NULL && car->type == ISCCC_SEXPRTYPE_DOTTEDPAIR);
caar = CAR(car);
if (caar->type == ISCCC_SEXPRTYPE_STRING &&
strcmp(caar->value.as_string, key) == 0) {
CDR(prev) = CDR(rest);
CDR(rest) = NULL;
isccc_sexpr_free(&rest);
break;
}
prev = rest;
rest = CDR(rest);
}
}
isccc_sexpr_t *
isccc_alist_define(isccc_sexpr_t *alist, const char *key, isccc_sexpr_t *value)
{
isccc_sexpr_t *kv, *k, *elt;
kv = isccc_alist_assq(alist, key);
if (kv == NULL) {
/*
* New association.
*/
k = isccc_sexpr_fromstring(key);
if (k == NULL)
return (NULL);
kv = isccc_sexpr_cons(k, value);
if (kv == NULL) {
isccc_sexpr_free(&kv);
return (NULL);
}
elt = isccc_sexpr_addtolist(&alist, kv);
if (elt == NULL) {
isccc_sexpr_free(&kv);
return (NULL);
}
} else {
/*
* We've already got an entry for this key. Replace it.
*/
isccc_sexpr_free(&CDR(kv));
CDR(kv) = value;
}
return (kv);
}
isccc_sexpr_t *
isccc_alist_definestring(isccc_sexpr_t *alist, const char *key, const char *str)
{
isccc_sexpr_t *v, *kv;
v = isccc_sexpr_fromstring(str);
if (v == NULL)
return (NULL);
kv = isccc_alist_define(alist, key, v);
if (kv == NULL)
isccc_sexpr_free(&v);
return (kv);
}
isccc_sexpr_t *
isccc_alist_definebinary(isccc_sexpr_t *alist, const char *key, isccc_region_t *r)
{
isccc_sexpr_t *v, *kv;
v = isccc_sexpr_frombinary(r);
if (v == NULL)
return (NULL);
kv = isccc_alist_define(alist, key, v);
if (kv == NULL)
isccc_sexpr_free(&v);
return (kv);
}
isccc_sexpr_t *
isccc_alist_lookup(isccc_sexpr_t *alist, const char *key)
{
isccc_sexpr_t *kv;
kv = isccc_alist_assq(alist, key);
if (kv != NULL)
return (CDR(kv));
return (NULL);
}
isc_result_t
isccc_alist_lookupstring(isccc_sexpr_t *alist, const char *key, char **strp)
{
isccc_sexpr_t *kv, *v;
kv = isccc_alist_assq(alist, key);
if (kv != NULL) {
v = CDR(kv);
if (isccc_sexpr_stringp(v)) {
if (strp != NULL)
*strp = isccc_sexpr_tostring(v);
return (ISC_R_SUCCESS);
} else
return (ISC_R_EXISTS);
}
return (ISC_R_NOTFOUND);
}
isc_result_t
isccc_alist_lookupbinary(isccc_sexpr_t *alist, const char *key, isccc_region_t **r)
{
isccc_sexpr_t *kv, *v;
kv = isccc_alist_assq(alist, key);
if (kv != NULL) {
v = CDR(kv);
if (isccc_sexpr_binaryp(v)) {
if (r != NULL)
*r = isccc_sexpr_tobinary(v);
return (ISC_R_SUCCESS);
} else
return (ISC_R_EXISTS);
}
return (ISC_R_NOTFOUND);
}
void
isccc_alist_prettyprint(isccc_sexpr_t *sexpr, unsigned int indent, FILE *stream)
{
isccc_sexpr_t *elt, *kv, *k, *v;
if (isccc_alist_alistp(sexpr)) {
fprintf(stream, "{\n");
indent += 4;
for (elt = isccc_alist_first(sexpr);
elt != NULL;
elt = CDR(elt)) {
kv = CAR(elt);
INSIST(isccc_sexpr_listp(kv));
k = CAR(kv);
v = CDR(kv);
INSIST(isccc_sexpr_stringp(k));
fprintf(stream, "%.*s%s => ", (int)indent, spaces,
isccc_sexpr_tostring(k));
isccc_alist_prettyprint(v, indent, stream);
if (CDR(elt) != NULL)
fprintf(stream, ",");
fprintf(stream, "\n");
}
indent -= 4;
fprintf(stream, "%.*s}", (int)indent, spaces);
} else if (isccc_sexpr_listp(sexpr)) {
fprintf(stream, "(\n");
indent += 4;
for (elt = sexpr;
elt != NULL;
elt = CDR(elt)) {
fprintf(stream, "%.*s", (int)indent, spaces);
isccc_alist_prettyprint(CAR(elt), indent, stream);
if (CDR(elt) != NULL)
fprintf(stream, ",");
fprintf(stream, "\n");
}
indent -= 4;
fprintf(stream, "%.*s)", (int)indent, spaces);
} else
isccc_sexpr_print(sexpr, stream);
}