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1 | /* -*-c-*- |
2 | * |
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3 | * $Id: alloc.c,v 1.4 2000/06/17 10:35:51 mdw Exp $ |
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4 | * |
5 | * Memory allocation functions |
6 | * |
7 | * (c) 1998 Straylight/Edgeware |
8 | */ |
9 | |
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10 | /*----- Licensing notice --------------------------------------------------* |
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11 | * |
12 | * This file is part of the mLib utilities library. |
13 | * |
14 | * mLib is free software; you can redistribute it and/or modify |
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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 | * |
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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 |
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22 | * GNU Library General Public License for more details. |
23 | * |
24 | * You should have received a copy of the GNU Library General Public |
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25 | * License along with mLib; if not, write to the Free |
26 | * Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, |
27 | * MA 02111-1307, USA. |
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28 | */ |
29 | |
30 | /*----- Revision history --------------------------------------------------* |
31 | * |
32 | * $Log: alloc.c,v $ |
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33 | * Revision 1.4 2000/06/17 10:35:51 mdw |
34 | * Major overhaul for arena support. |
35 | * |
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36 | * Revision 1.3 1999/05/06 19:51:35 mdw |
37 | * Reformatted the LGPL notice a little bit. |
38 | * |
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39 | * Revision 1.2 1999/05/05 18:50:31 mdw |
40 | * Change licensing conditions to LGPL. |
41 | * |
42 | * Revision 1.1.1.1 1998/06/17 23:44:42 mdw |
43 | * Initial version of mLib |
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44 | * |
45 | */ |
46 | |
47 | /*----- Header files ------------------------------------------------------*/ |
48 | |
49 | /* --- ANSI headers --- */ |
50 | |
51 | #include <stdio.h> |
52 | #include <stdlib.h> |
53 | #include <string.h> |
54 | |
55 | /* --- Local headers --- */ |
56 | |
57 | #include "alloc.h" |
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58 | #include "arena.h" |
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59 | #include "exc.h" |
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60 | |
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61 | /*----- Functions and macros ----------------------------------------------*/ |
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62 | |
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63 | /* --- @x_alloc@ --- * |
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64 | * |
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65 | * Arguments: @arena *a@ = pointer to underlying arena |
66 | * @size_t sz@ = size of block to allocate |
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67 | * |
68 | * Returns: Pointer to allocated block. |
69 | * |
70 | * Use: Allocates memory. If there's not enough memory, the |
71 | * exception @EXC_NOMEM@ is thrown. |
72 | */ |
73 | |
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74 | void *x_alloc(arena *a, size_t sz) |
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75 | { |
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76 | void *p = A_ALLOC(a, sz); |
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77 | if (!p) |
78 | THROW(EXC_NOMEM); |
79 | return (p); |
80 | } |
81 | |
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82 | /* --- @x_strdup@ --- * |
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83 | * |
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84 | * Arguments: @arena *a@ = pointer to underlying arena |
85 | * @const char *s@ = pointer to a string |
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86 | * |
87 | * Returns: Pointer to a copy of the string. |
88 | * |
89 | * Use: Copies a string (like @strdup@ would, if it existed). If |
90 | * there's not enough memory, the exception @EXC_NOMEM@ is |
91 | * thrown. |
92 | */ |
93 | |
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94 | char *x_strdup(arena *a, const char *s) |
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95 | { |
96 | size_t sz = strlen(s) + 1; |
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97 | char *p = x_alloc(a, sz); |
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98 | memcpy(p, s, sz); |
99 | return (p); |
100 | } |
101 | |
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102 | /* --- @x_realloc@ --- * |
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103 | * |
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104 | * Arguments: @arena *a@ = pointer to underlying arena |
105 | * @void *p@ = pointer to a block of memory |
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106 | * @size_t sz@ = new size desired for the block |
107 | * |
108 | * Returns: Pointer to the resized memory block (which is almost |
109 | * certainly not in the same place any more). |
110 | * |
111 | * Use: Resizes a memory block. If there's not enough memory, the |
112 | * exception @EXC_NOMEM@ is thrown. |
113 | */ |
114 | |
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115 | void *x_realloc(arena *a, void *p, size_t sz) |
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116 | { |
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117 | p = A_REALLOC(a, p, sz); |
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118 | if (!p) |
119 | THROW(EXC_NOMEM); |
120 | return (p); |
121 | } |
122 | |
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123 | /* --- @x_free@ --- * |
124 | * |
125 | * Arguments: @arena *a@ = pointer to underlying arena |
126 | * @void *p@ = pointer to a block of memory. |
127 | * |
128 | * Returns: --- |
129 | * |
130 | * Use: Frees a block of memory. |
131 | */ |
132 | |
133 | void (x_free)(arena *a, void *p) { x_free(a, p); } |
134 | |
135 | /*----- Old functions for the standard arena ------------------------------*/ |
136 | |
137 | /* --- @xmalloc@ --- * |
138 | * |
139 | * Arguments: @size_t sz@ = size of block to allocate |
140 | * |
141 | * Returns: Pointer to allocated block. |
142 | * |
143 | * Use: Allocates memory. If there's not enough memory, the |
144 | * exception @EXC_NOMEM@ is thrown. |
145 | */ |
146 | |
147 | void *(xmalloc)(size_t sz) { return xmalloc(sz); } |
148 | |
149 | /* --- @xstrdup@ --- * |
150 | * |
151 | * Arguments: @const char *s@ = pointer to a string |
152 | * |
153 | * Returns: Pointer to a copy of the string. |
154 | * |
155 | * Use: Copies a string (like @strdup@ would, if it existed). If |
156 | * there's not enough memory, the exception @EXC_NOMEM@ is |
157 | * thrown. |
158 | */ |
159 | |
160 | char *(xstrdup)(const char *s) { return xstrdup(s); } |
161 | |
162 | /* --- @xrealloc@ --- * |
163 | * |
164 | * Arguments: @void *p@ = pointer to a block of memory |
165 | * @size_t sz@ = new size desired for the block |
166 | * |
167 | * Returns: Pointer to the resized memory block (which is almost |
168 | * certainly not in the same place any more). |
169 | * |
170 | * Use: Resizes a memory block. If there's not enough memory, the |
171 | * exception @EXC_NOMEM@ is thrown. |
172 | */ |
173 | |
174 | void *(xrealloc)(void *p, size_t sz) { return xrealloc(p, sz); } |
175 | |
176 | /* --- @xfree@ --- * |
177 | * |
178 | * Arguments: @void *p@ = pointer to a block of memory. |
179 | * |
180 | * Returns: --- |
181 | * |
182 | * Use: Frees a block of memory. |
183 | */ |
184 | |
185 | void (xfree)(void *p) { xfree(p); } |
186 | |
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187 | /*----- That's all, folks -------------------------------------------------*/ |