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1 | /* -*-c-*- |
2 | * |
3 | * $Id: dspool.c,v 1.1 1999/05/21 22:15:26 mdw Exp $ |
4 | * |
5 | * Provide pools of strings |
6 | * |
7 | * (c) 1999 Straylight/Edgeware |
8 | */ |
9 | |
10 | /*----- Licensing notice --------------------------------------------------* |
11 | * |
12 | * This file is part of the mLib utilities library. |
13 | * |
14 | * mLib is free software; you can redistribute it and/or modify |
15 | * it under the terms of the GNU Library General Public License as |
16 | * published by the Free Software Foundation; either version 2 of the |
17 | * License, or (at your option) any later version. |
18 | * |
19 | * mLib is distributed in the hope that it will be useful, |
20 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
21 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
22 | * GNU Library General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU Library General Public |
25 | * License along with mLib; if not, write to the Free Software |
26 | * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
27 | */ |
28 | |
29 | /*----- Revision history --------------------------------------------------* |
30 | * |
31 | * $Log: dspool.c,v $ |
32 | * Revision 1.1 1999/05/21 22:15:26 mdw |
33 | * Dynamic string pool system, based on an idea from the `sw-tools' |
34 | * project. Could do with more work to make it really good. |
35 | * |
36 | */ |
37 | |
38 | /*----- Header files ------------------------------------------------------*/ |
39 | |
40 | #include <stdio.h> |
41 | |
42 | #include "dspool.h" |
43 | #include "dstr.h" |
44 | #include "sub.h" |
45 | |
46 | /*----- Main code ---------------------------------------------------------*/ |
47 | |
48 | /* --- @dspool_create@ --- * |
49 | * |
50 | * Arguments: @dspool *p@ = address of pool to create |
51 | * @size_t isz@ = initial size of new strings |
52 | * |
53 | * Returns: --- |
54 | * |
55 | * Use: Initializes a dynamic string pool. |
56 | */ |
57 | |
58 | void dspool_create(dspool *p, size_t isz) |
59 | { |
60 | p->free = 0; |
61 | p->isz = isz; |
62 | } |
63 | |
64 | /* --- @dspool_destroy@ --- * |
65 | * |
66 | * Arguments: @dspool *p@ = pool to destroy |
67 | * |
68 | * Returns: --- |
69 | * |
70 | * Use: Releases all of the strings left in the pool. Any strings |
71 | * not put back into the pool aren't freed. However, the pool |
72 | * is still valid, and the active strings can be put back and |
73 | * released later. |
74 | */ |
75 | |
76 | void dspool_destroy(dspool *p) |
77 | { |
78 | dspoolstr *s = p->free; |
79 | while (s) { |
80 | dspoolstr *n = s->next; |
81 | DDESTROY(&s->ds); |
82 | DESTROY(s); |
83 | s = n; |
84 | } |
85 | p->free = 0; |
86 | } |
87 | |
88 | /* --- @dspool_get@ --- * |
89 | * |
90 | * Arguments: @dspool *p@ = pointer to a string pool |
91 | * |
92 | * Returns: Pointer to a dynamic string. |
93 | * |
94 | * Use: Fetches a string from the pool. The string has space for at |
95 | * least @isz@ characters (where @isz@ is the size passed to |
96 | * @dspool_create@ for the pool). |
97 | */ |
98 | |
99 | dstr *dspool_get(dspool *p) { dstr *d; DSGET(p, d); return (d); } |
100 | |
101 | /* --- @dspool_put@ --- * |
102 | * |
103 | * Arguments: @dspool *p@ = pointer to a string pool |
104 | * @dstr *d@ = pointer to a dynamic string from a string pool |
105 | * |
106 | * Returns: --- |
107 | * |
108 | * Use: Releases a dynamic string back into a string pool. It |
109 | * doesn't have to be the same pool the string actually came |
110 | * from, although it does have to have come from some string |
111 | * pool. |
112 | */ |
113 | |
114 | void dspool_put(dspool *p, dstr *d) { DSPUT(p, d); } |
115 | |
116 | /*----- That's all, folks -------------------------------------------------*/ |