792. [cleanup] Replace the OMAPI command channel protocol with a
simpler one.
This commit is contained in:
Brian Wellington
296
lib/isccc/alist.c
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296
lib/isccc/alist.c
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/*
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* Copyright (C) 2001 Internet Software Consortium.
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND INTERNET SOFTWARE CONSORTIUM
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* DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL
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* INTERNET SOFTWARE CONSORTIUM BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING
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* FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
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* NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
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* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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/* $Id: alist.c,v 1.1 2001/03/27 00:44:47 bwelling Exp $ */
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#include <config.h>
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#include <stdlib.h>
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#include <string.h>
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#include <isccc/alist.h>
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#include <isc/assertions.h>
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#include <isccc/result.h>
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#include <isccc/sexpr.h>
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#include <isccc/util.h>
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#define CAR(s) (s)->value.as_dottedpair.car
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#define CDR(s) (s)->value.as_dottedpair.cdr
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#define ALIST_TAG "*alist*"
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#define MAX_INDENT 64
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static char spaces[MAX_INDENT + 1] =
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" ";
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isccc_sexpr_t *
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isccc_alist_create(void)
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{
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isccc_sexpr_t *alist, *tag;
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tag = isccc_sexpr_fromstring(ALIST_TAG);
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if (tag == NULL)
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return (NULL);
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alist = isccc_sexpr_cons(tag, NULL);
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if (alist == NULL) {
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isccc_sexpr_free(&tag);
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return (NULL);
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}
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return (alist);
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}
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isc_boolean_t
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isccc_alist_alistp(isccc_sexpr_t *alist)
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{
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isccc_sexpr_t *car;
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if (alist == NULL || alist->type != ISCCC_SEXPRTYPE_DOTTEDPAIR)
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return (ISC_FALSE);
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car = CAR(alist);
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if (car == NULL || car->type != ISCCC_SEXPRTYPE_STRING)
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return (ISC_FALSE);
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if (strcmp(car->value.as_string, ALIST_TAG) != 0)
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return (ISC_FALSE);
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return (ISC_TRUE);
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}
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isc_boolean_t
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isccc_alist_emptyp(isccc_sexpr_t *alist)
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{
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REQUIRE(isccc_alist_alistp(alist));
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if (CDR(alist) == NULL)
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return (ISC_TRUE);
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return (ISC_FALSE);
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}
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isccc_sexpr_t *
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isccc_alist_first(isccc_sexpr_t *alist)
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{
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REQUIRE(isccc_alist_alistp(alist));
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return (CDR(alist));
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}
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isccc_sexpr_t *
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isccc_alist_assq(isccc_sexpr_t *alist, const char *key)
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{
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isccc_sexpr_t *car, *caar;
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REQUIRE(isccc_alist_alistp(alist));
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/*
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* Skip alist type tag.
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*/
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alist = CDR(alist);
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while (alist != NULL) {
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INSIST(alist->type == ISCCC_SEXPRTYPE_DOTTEDPAIR);
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car = CAR(alist);
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INSIST(car->type == ISCCC_SEXPRTYPE_DOTTEDPAIR);
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caar = CAR(car);
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if (caar->type == ISCCC_SEXPRTYPE_STRING &&
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strcmp(caar->value.as_string, key) == 0)
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return (car);
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alist = CDR(alist);
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}
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return (NULL);
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}
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void
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isccc_alist_delete(isccc_sexpr_t *alist, const char *key)
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{
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isccc_sexpr_t *car, *caar, *rest, *prev;
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REQUIRE(isccc_alist_alistp(alist));
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prev = alist;
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rest = CDR(alist);
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while (rest != NULL) {
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INSIST(rest->type == ISCCC_SEXPRTYPE_DOTTEDPAIR);
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car = CAR(rest);
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INSIST(car != NULL && car->type == ISCCC_SEXPRTYPE_DOTTEDPAIR);
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caar = CAR(car);
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if (caar->type == ISCCC_SEXPRTYPE_STRING &&
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strcmp(caar->value.as_string, key) == 0) {
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CDR(prev) = CDR(rest);
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CDR(rest) = NULL;
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isccc_sexpr_free(&rest);
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break;
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}
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prev = rest;
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rest = CDR(rest);
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}
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}
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isccc_sexpr_t *
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isccc_alist_define(isccc_sexpr_t *alist, const char *key, isccc_sexpr_t *value)
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{
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isccc_sexpr_t *kv, *k, *elt;
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kv = isccc_alist_assq(alist, key);
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if (kv == NULL) {
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/*
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* New association.
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*/
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k = isccc_sexpr_fromstring(key);
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if (k == NULL)
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return (NULL);
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kv = isccc_sexpr_cons(k, value);
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if (kv == NULL) {
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isccc_sexpr_free(&kv);
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return (NULL);
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}
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elt = isccc_sexpr_addtolist(&alist, kv);
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if (elt == NULL) {
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isccc_sexpr_free(&kv);
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return (NULL);
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}
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} else {
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/*
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* We've already got an entry for this key. Replace it.
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*/
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isccc_sexpr_free(&CDR(kv));
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CDR(kv) = value;
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}
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return (kv);
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}
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isccc_sexpr_t *
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isccc_alist_definestring(isccc_sexpr_t *alist, const char *key, const char *str)
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{
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isccc_sexpr_t *v, *kv;
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v = isccc_sexpr_fromstring(str);
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if (v == NULL)
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return (NULL);
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kv = isccc_alist_define(alist, key, v);
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if (kv == NULL)
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isccc_sexpr_free(&v);
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return (kv);
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}
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isccc_sexpr_t *
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isccc_alist_definebinary(isccc_sexpr_t *alist, const char *key, isccc_region_t *r)
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{
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isccc_sexpr_t *v, *kv;
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v = isccc_sexpr_frombinary(r);
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if (v == NULL)
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return (NULL);
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kv = isccc_alist_define(alist, key, v);
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if (kv == NULL)
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isccc_sexpr_free(&v);
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return (kv);
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}
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isccc_sexpr_t *
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isccc_alist_lookup(isccc_sexpr_t *alist, const char *key)
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{
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isccc_sexpr_t *kv;
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kv = isccc_alist_assq(alist, key);
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if (kv != NULL)
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return (CDR(kv));
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return (NULL);
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}
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isc_result_t
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isccc_alist_lookupstring(isccc_sexpr_t *alist, const char *key, char **strp)
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{
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isccc_sexpr_t *kv, *v;
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kv = isccc_alist_assq(alist, key);
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if (kv != NULL) {
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v = CDR(kv);
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if (isccc_sexpr_stringp(v)) {
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if (strp != NULL)
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*strp = isccc_sexpr_tostring(v);
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return (ISC_R_SUCCESS);
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} else
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return (ISC_R_EXISTS);
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}
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return (ISC_R_NOTFOUND);
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}
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isc_result_t
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isccc_alist_lookupbinary(isccc_sexpr_t *alist, const char *key, isccc_region_t **r)
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{
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isccc_sexpr_t *kv, *v;
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kv = isccc_alist_assq(alist, key);
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if (kv != NULL) {
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v = CDR(kv);
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if (isccc_sexpr_binaryp(v)) {
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if (r != NULL)
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*r = isccc_sexpr_tobinary(v);
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return (ISC_R_SUCCESS);
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} else
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return (ISC_R_EXISTS);
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}
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return (ISC_R_NOTFOUND);
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}
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void
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isccc_alist_prettyprint(isccc_sexpr_t *sexpr, unsigned int indent, FILE *stream)
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{
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isccc_sexpr_t *elt, *kv, *k, *v;
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if (isccc_alist_alistp(sexpr)) {
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fprintf(stream, "{\n");
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indent += 4;
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for (elt = isccc_alist_first(sexpr);
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elt != NULL;
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elt = CDR(elt)) {
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kv = CAR(elt);
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INSIST(isccc_sexpr_listp(kv));
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k = CAR(kv);
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v = CDR(kv);
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INSIST(isccc_sexpr_stringp(k));
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fprintf(stream, "%.*s%s => ", (int)indent, spaces,
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isccc_sexpr_tostring(k));
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isccc_alist_prettyprint(v, indent, stream);
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if (CDR(elt) != NULL)
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fprintf(stream, ",");
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fprintf(stream, "\n");
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}
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indent -= 4;
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fprintf(stream, "%.*s}", (int)indent, spaces);
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} else if (isccc_sexpr_listp(sexpr)) {
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fprintf(stream, "(\n");
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indent += 4;
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for (elt = sexpr;
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elt != NULL;
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elt = CDR(elt)) {
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fprintf(stream, "%.*s", (int)indent, spaces);
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isccc_alist_prettyprint(CAR(elt), indent, stream);
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if (CDR(elt) != NULL)
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fprintf(stream, ",");
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fprintf(stream, "\n");
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}
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indent -= 4;
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fprintf(stream, "%.*s)", (int)indent, spaces);
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} else
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isccc_sexpr_print(sexpr, stream);
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}
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