sconst.c

来自「使用BorlandC++4.5编译的一个MUD客户端程序」· C语言 代码 · 共 99 行

head	2.1;
access;
symbols;
locks; strict;
comment	@ * @;


2.1
date	95.10.24.15.46.14;	author tsurace;	state Release;
branches;
next	1.1;

1.1
date	95.10.12.20.52.34;	author tsurace;	state Beta;
branches;
next	;


desc
@String constant management.
@


2.1
log
@Roll.
@
text
@/* sconst.c: Handle addition and removal of string constants */
/* $Id: sconst.c 1.1 1995/10/12 20:52:34 tsurace Beta tsurace $ */

#include "vt.h"
#define STSIZE 101

struct sconst {
	Rstr *rs;			/* Given to program		*/
	int refs;			/* Ref count from programs only */
	struct sconst *next;
};

static struct sconst *sctab[STSIZE];

Rstr *add_sconst(cstr)
	Cstr *cstr;
{
	int ind;
	struct sconst *new, *sc;

	ind = hash(cstr->s, STSIZE);
	for (sc = sctab[ind]; sc; sc = sc->next) {
		if (streq(sc->rs->str.c.s, cstr->s))
			break;
	}
	if (sc) {
		sc->refs++;
		return sc->rs;
	}
	new = New(struct sconst);
	new->rs = New(Rstr);
	new->rs->str.c = *cstr;
	new->rs->str.sz = cstr->l + 1;
	new->rs->refs = 1;
	new->refs = 1;
	new->next = sctab[ind];
	sctab[ind] = new;
	cstr->s = NULL;
	return new->rs;
}

void del_sconst(rs)
	Rstr *rs;
{
	int ind;
	struct sconst **sc, *next;

	ind = hash(rs->str.c.s, STSIZE);
	for (sc = &sctab[ind]; (*sc)->rs != rs; sc = &(*sc)->next);
	if (--(*sc)->refs)
		return;
	dec_ref_rstr(rs);
	next = (*sc)->next;
	Discard(*sc, struct sconst);
	*sc = next;
}


@


1.1
log
@Initial revision
@
text
@d2 1
a2 1
/* $Id$ */
@