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/*
* Copyright (c) 1996 by Internet Software Consortium.
*
* Permission to use, copy, modify, and 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 INTERNET SOFTWARE CONSORTIUM DISCLAIMS
* ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL INTERNET SOFTWARE
* CONSORTIUM 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.
*/
#if !defined(LINT) && !defined(CODECENTER)
static char rcsid[] = "$Id: gen_sv.c,v 1.8 1997/12/04 04:57:52 halley Exp $";
#endif
/* Imports */
#include "port_before.h"
#include <sys/types.h>
#include <errno.h>
#include <stdlib.h>
#include <string.h>
#include <irs.h>
#include "port_after.h"
#include "irs_p.h"
#include "gen_p.h"
/* Types */
struct pvt {
struct irs_rule * rules;
struct irs_rule * rule;
};
/* Forward */
static void sv_close(struct irs_sv*);
static struct servent * sv_next(struct irs_sv *);
static struct servent * sv_byname(struct irs_sv *, const char *,
const char *);
static struct servent * sv_byport(struct irs_sv *, int, const char *);
static void sv_rewind(struct irs_sv *);
static void sv_minimize(struct irs_sv *);
/* Public */
struct irs_sv *
irs_gen_sv(struct irs_acc *this) {
struct gen_p *accpvt = (struct gen_p *)this->private;
struct irs_sv *sv;
struct pvt *pvt;
if (!(sv = (struct irs_sv *)malloc(sizeof *sv))) {
errno = ENOMEM;
return (NULL);
}
memset(sv, 0x5e, sizeof *sv);
if (!(pvt = (struct pvt *)malloc(sizeof *pvt))) {
free(sv);
errno = ENOMEM;
return (NULL);
}
memset(pvt, 0, sizeof *pvt);
pvt->rules = accpvt->map_rules[irs_sv];
pvt->rule = pvt->rules;
sv->private = pvt;
sv->close = sv_close;
sv->next = sv_next;
sv->byname = sv_byname;
sv->byport = sv_byport;
sv->rewind = sv_rewind;
sv->minimize = sv_minimize;
return (sv);
}
/* Methods */
static void
sv_close(struct irs_sv *this) {
struct pvt *pvt = (struct pvt *)this->private;
free(pvt);
free(this);
}
static struct servent *
sv_next(struct irs_sv *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct servent *rval;
struct irs_sv *sv;
while (pvt->rule) {
sv = pvt->rule->inst->sv;
rval = (*sv->next)(sv);
if (rval)
return (rval);
if (!(pvt->rule->flags & IRS_CONTINUE))
break;
pvt->rule = pvt->rule->next;
if (pvt->rule) {
sv = pvt->rule->inst->sv;
(*sv->rewind)(sv);
}
}
return (NULL);
}
static struct servent *
sv_byname(struct irs_sv *this, const char *name, const char *proto) {
struct pvt *pvt = (struct pvt *)this->private;
struct irs_rule *rule;
struct servent *rval;
struct irs_sv *sv;
rval = NULL;
for (rule = pvt->rules; rule; rule = rule->next) {
sv = rule->inst->sv;
rval = (*sv->byname)(sv, name, proto);
if (rval || !(rule->flags & IRS_CONTINUE))
break;
}
return (rval);
}
static struct servent *
sv_byport(struct irs_sv *this, int port, const char *proto) {
struct pvt *pvt = (struct pvt *)this->private;
struct irs_rule *rule;
struct servent *rval;
struct irs_sv *sv;
rval = NULL;
for (rule = pvt->rules; rule; rule = rule->next) {
sv = rule->inst->sv;
rval = (*sv->byport)(sv, port, proto);
if (rval || !(rule->flags & IRS_CONTINUE))
break;
}
return (rval);
}
static void
sv_rewind(struct irs_sv *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct irs_sv *sv;
pvt->rule = pvt->rules;
if (pvt->rule) {
sv = pvt->rule->inst->sv;
(*sv->rewind)(sv);
}
}
static void
sv_minimize(struct irs_sv *this) {
struct pvt *pvt = (struct pvt *)this->private;
struct irs_rule *rule;
for (rule = pvt->rules; rule != NULL; rule = rule->next) {
struct irs_sv *sv = rule->inst->sv;
(*sv->minimize)(sv);
}
}
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