1 | //memmgr.c: |
---|
2 | |
---|
3 | /* |
---|
4 | * Copyright (C) Philipp 'ph3-der-loewe' Schafft - 2010-2011 |
---|
5 | * |
---|
6 | * This file is part of libroar a part of RoarAudio, |
---|
7 | * a cross-platform sound system for both, home and professional use. |
---|
8 | * See README for details. |
---|
9 | * |
---|
10 | * This file is free software; you can redistribute it and/or modify |
---|
11 | * it under the terms of the GNU General Public License version 3 |
---|
12 | * as published by the Free Software Foundation. |
---|
13 | * |
---|
14 | * libroar is distributed in the hope that it will be useful, |
---|
15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
---|
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
---|
17 | * GNU General Public License for more details. |
---|
18 | * |
---|
19 | * You should have received a copy of the GNU General Public License |
---|
20 | * along with this software; see the file COPYING. If not, write to |
---|
21 | * the Free Software Foundation, 51 Franklin Street, Fifth Floor, |
---|
22 | * Boston, MA 02110-1301, USA. |
---|
23 | * |
---|
24 | * NOTE for everyone want's to change something and send patches: |
---|
25 | * read README and HACKING! There a addition information on |
---|
26 | * the license of this document you need to read before you send |
---|
27 | * any patches. |
---|
28 | * |
---|
29 | * NOTE for uses of non-GPL (LGPL,...) software using libesd, libartsc |
---|
30 | * or libpulse*: |
---|
31 | * The libs libroaresd, libroararts and libroarpulse link this lib |
---|
32 | * and are therefore GPL. Because of this it may be illigal to use |
---|
33 | * them with any software that uses libesd, libartsc or libpulse*. |
---|
34 | */ |
---|
35 | |
---|
36 | #include "libroar.h" |
---|
37 | |
---|
38 | #ifdef ROAR_USE_MEMMGR |
---|
39 | static char _libroar_null_buffer[8] = {0, 0, 0, 0, 0, 0, 0, 0}; |
---|
40 | #endif |
---|
41 | |
---|
42 | #define _err(x) do { roar_err_set((x)); return NULL; } while (0) |
---|
43 | |
---|
44 | #ifdef ROAR_USE_MEMMGR |
---|
45 | void * roar_mm_calloc(size_t nmemb, size_t size) { |
---|
46 | void * ret; |
---|
47 | |
---|
48 | if ( nmemb == 0 || size == 0 ) |
---|
49 | return _libroar_null_buffer; |
---|
50 | |
---|
51 | #ifdef ROAR_HAVE_CALLOC |
---|
52 | roar_err_clear_all(); |
---|
53 | ret = calloc(nmemb, size); |
---|
54 | |
---|
55 | if ( ret == NULL ) |
---|
56 | roar_err_update(); |
---|
57 | |
---|
58 | return ret; |
---|
59 | #else |
---|
60 | ret = roar_mm_malloc(nmemb*size); |
---|
61 | if ( ret == NULL ) |
---|
62 | return NULL; |
---|
63 | |
---|
64 | memset(ret, 0, nmemb*size); |
---|
65 | |
---|
66 | return ret; |
---|
67 | #endif |
---|
68 | } |
---|
69 | |
---|
70 | void * roar_mm_malloc(size_t size) { |
---|
71 | void * ret; |
---|
72 | |
---|
73 | if ( size == 0 ) |
---|
74 | return _libroar_null_buffer; |
---|
75 | |
---|
76 | #ifdef ROAR_HAVE_MALLOC |
---|
77 | roar_err_clear_all(); |
---|
78 | ret = malloc(size); |
---|
79 | |
---|
80 | if ( ret == NULL ) |
---|
81 | roar_err_update(); |
---|
82 | |
---|
83 | return ret; |
---|
84 | #elif defined(ROAR_HAVE_CALLOC) |
---|
85 | return roar_mm_calloc(1, size); |
---|
86 | #elif defined(ROAR_HAVE_REALLOC) |
---|
87 | return roar_mm_realloc(NULL, size); |
---|
88 | #else |
---|
89 | _err(ROAR_ERROR_NOSYS); |
---|
90 | #endif |
---|
91 | } |
---|
92 | |
---|
93 | int roar_mm_free(void *ptr) { |
---|
94 | if ( ptr == _libroar_null_buffer ) |
---|
95 | return 0; |
---|
96 | |
---|
97 | #ifdef ROAR_HAVE_FREE |
---|
98 | free(ptr); |
---|
99 | return 0; |
---|
100 | #elif defined(ROAR_HAVE_REALLOC) |
---|
101 | if ( roar_mm_realloc(ptr, 0) != _libroar_null_buffer ) |
---|
102 | return -1; |
---|
103 | return 0; |
---|
104 | #else |
---|
105 | roar_err_set(ROAR_ERROR_NOSYS); |
---|
106 | return -1; |
---|
107 | #endif |
---|
108 | } |
---|
109 | |
---|
110 | void * roar_mm_realloc(void *ptr, size_t size) { |
---|
111 | #ifdef ROAR_HAVE_REALLOC |
---|
112 | void * ret; |
---|
113 | #endif |
---|
114 | |
---|
115 | if ( ptr == NULL ) |
---|
116 | return roar_mm_malloc(size); |
---|
117 | |
---|
118 | if ( size == 0 ) { |
---|
119 | roar_mm_free(ptr); |
---|
120 | return _libroar_null_buffer; |
---|
121 | } |
---|
122 | |
---|
123 | #ifdef ROAR_HAVE_REALLOC |
---|
124 | roar_err_clear_all(); |
---|
125 | ret = realloc(ptr, size); |
---|
126 | |
---|
127 | if ( ret == NULL ) |
---|
128 | roar_err_update(); |
---|
129 | |
---|
130 | return ret; |
---|
131 | #else |
---|
132 | _err(ROAR_ERROR_NOTSUP); |
---|
133 | #endif |
---|
134 | } |
---|
135 | #endif |
---|
136 | |
---|
137 | void * roar_mm_memdup(const void * s, size_t len) { |
---|
138 | void * ret; |
---|
139 | |
---|
140 | if ( s == NULL ) |
---|
141 | _err(ROAR_ERROR_FAULT); |
---|
142 | |
---|
143 | ret = roar_mm_malloc(len); |
---|
144 | |
---|
145 | if ( ret == NULL ) |
---|
146 | return NULL; |
---|
147 | |
---|
148 | memcpy(ret, s, len); |
---|
149 | |
---|
150 | return ret; |
---|
151 | } |
---|
152 | |
---|
153 | #if defined(ROAR_USE_MEMMGR) || !defined(ROAR_HAVE_STRDUP) |
---|
154 | char * roar_mm_strdup(const char *s) { |
---|
155 | void * ret; |
---|
156 | #ifndef ROAR_HAVE_STRDUP |
---|
157 | ssize_t len; |
---|
158 | #endif |
---|
159 | |
---|
160 | if ( s == NULL ) |
---|
161 | _err(ROAR_ERROR_FAULT); |
---|
162 | |
---|
163 | #ifdef ROAR_HAVE_STRDUP |
---|
164 | roar_err_clear_all(); |
---|
165 | ret = strdup(s); |
---|
166 | |
---|
167 | if ( ret == NULL ) |
---|
168 | roar_err_update(); |
---|
169 | #else |
---|
170 | len = roar_mm_strlen(s); |
---|
171 | if ( len == -1 ) |
---|
172 | return NULL; |
---|
173 | |
---|
174 | ret = roar_mm_memdup(s, len+1); |
---|
175 | #endif |
---|
176 | |
---|
177 | return ret; |
---|
178 | } |
---|
179 | #endif |
---|
180 | |
---|
181 | #if defined(ROAR_USE_MEMMGR) || !defined(ROAR_HAVE_STRNDUP) |
---|
182 | char *roar_mm_strndup(const char *s, size_t n) { |
---|
183 | void * ret; |
---|
184 | #ifndef ROAR_HAVE_STRDUP |
---|
185 | ssize_t len; |
---|
186 | #endif |
---|
187 | |
---|
188 | if ( s == NULL ) |
---|
189 | _err(ROAR_ERROR_FAULT); |
---|
190 | |
---|
191 | #ifdef ROAR_HAVE_STRDUP |
---|
192 | roar_err_clear_all(); |
---|
193 | ret = strndup(s, n); |
---|
194 | |
---|
195 | if ( ret == NULL ) |
---|
196 | roar_err_update(); |
---|
197 | #else |
---|
198 | len = roar_mm_strnlen(s, n); |
---|
199 | if ( len == -1 ) |
---|
200 | return NULL; |
---|
201 | |
---|
202 | ret = roar_mm_memdup(s, len+1); |
---|
203 | #endif |
---|
204 | |
---|
205 | return ret; |
---|
206 | } |
---|
207 | #endif |
---|
208 | |
---|
209 | #ifndef ROAR_HAVE_STRLEN |
---|
210 | ssize_t roar_mm_strlen(const char *s) { |
---|
211 | size_t ret = 0; |
---|
212 | |
---|
213 | if ( s == NULL ) { |
---|
214 | roar_err_set(ROAR_ERROR_FAULT); |
---|
215 | return -1; |
---|
216 | } |
---|
217 | |
---|
218 | for (; *s != 0; s++, ret++); |
---|
219 | |
---|
220 | return ret; |
---|
221 | } |
---|
222 | #endif |
---|
223 | |
---|
224 | ssize_t roar_mm_strnlen(const char *s, size_t maxlen) { |
---|
225 | size_t ret = 0; |
---|
226 | |
---|
227 | if ( s == NULL ) { |
---|
228 | roar_err_set(ROAR_ERROR_FAULT); |
---|
229 | return -1; |
---|
230 | } |
---|
231 | |
---|
232 | #ifdef ROAR_HAVE_STRNLEN |
---|
233 | ret = strnlen(s, maxlen); |
---|
234 | #else |
---|
235 | for (; ret < maxlen && *s != 0; s++, ret++); |
---|
236 | #endif |
---|
237 | |
---|
238 | if ( ret == maxlen ) { |
---|
239 | roar_err_set(ROAR_ERROR_MSGSIZE); |
---|
240 | return -1; |
---|
241 | } |
---|
242 | |
---|
243 | return ret; |
---|
244 | } |
---|
245 | |
---|
246 | //ll |
---|