3 * Provide pools of strings
5 * (c) 1999 Straylight/Edgeware
8 /*----- Licensing notice --------------------------------------------------*
10 * This file is part of the mLib utilities library.
12 * mLib is free software; you can redistribute it and/or modify
13 * it under the terms of the GNU Library General Public License as
14 * published by the Free Software Foundation; either version 2 of the
15 * License, or (at your option) any later version.
17 * mLib is distributed in the hope that it will be useful,
18 * but WITHOUT ANY WARRANTY; without even the implied warranty of
19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
20 * GNU Library General Public License for more details.
22 * You should have received a copy of the GNU Library General Public
23 * License along with mLib; if not, write to the Free Software
24 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
34 /*----- Header files ------------------------------------------------------*/
39 /*----- Data structures ---------------------------------------------------*/
41 typedef struct dspoolstr {
43 struct dspoolstr *next;
46 typedef struct dspool {
51 /*----- Functions provided ------------------------------------------------*/
53 /* --- @dspool_create@ --- *
55 * Arguments: @dspool *p@ = address of pool to create
56 * @size_t isz@ = initial size of new strings
60 * Use: Initializes a dynamic string pool.
63 extern void dspool_create(dspool */*p*/, size_t /*isz*/);
65 /* --- @dspool_destroy@ --- *
67 * Arguments: @dspool *p@ = pool to destroy
71 * Use: Releases all of the strings left in the pool. Any strings
72 * not put back into the pool aren't freed. However, the pool
73 * is still valid, and the active strings can be put back and
77 extern void dspool_destroy(dspool */*p*/);
79 /* --- @dspool_get@ --- *
81 * Arguments: @dspool *p@ = pointer to a string pool
83 * Returns: Pointer to a dynamic string.
85 * Use: Fetches a string from the pool. The string has space for at
86 * least @isz@ characters (where @isz@ is the size passed to
87 * @dspool_create@ for the pool).
90 extern dstr *dspool_get(dspool */*p*/);
92 #define DSGET(p, d) do { \
97 _p->free = _s->next; \
99 _s = CREATE(dspoolstr); \
102 DENSURE(&_s->ds, _p->isz); \
107 /* --- @dspool_put@ --- *
109 * Arguments: @dspool *p@ = pointer to a string pool
110 * @dstr *d@ = pointer to a dynamic string from a string pool
114 * Use: Releases a dynamic string back into a string pool. It
115 * doesn't have to be the same pool the string actually came
116 * from, although it does have to have come from some string
120 extern void dspool_put(dspool */*p*/, dstr */*d*/);
122 #define DSPUT(p, d) do { \
124 dspoolstr *_s = (dspoolstr *)(d); \
126 _s->next = _p->free; \
130 /*----- That's all, folks -------------------------------------------------*/