1 /* libFLAC - Free Lossless Audio Codec library
2 * Copyright (C) 2001,2002,2003,2004,2005,2006,2007 Josh Coalson
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 *
8 * - Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 *
11 * - Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 *
15 * - Neither the name of the Xiph.org Foundation nor the names of its
16 * contributors may be used to endorse or promote products derived from
17 * this software without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
21 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
22 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR
23 * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
24 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
25 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
26 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
27 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
28 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
29 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #ifdef HAVE_CONFIG_H
33 # include <config.h>
34 #endif
35
36 #include "private/memory.h"
37 #include "FLAC/assert.h"
38 #include "share/alloc.h"
39
FLAC__memory_alloc_aligned(size_t bytes,void ** aligned_address)40 void *FLAC__memory_alloc_aligned(size_t bytes, void **aligned_address)
41 {
42 void *x;
43
44 FLAC__ASSERT(0 != aligned_address);
45
46 #ifdef FLAC__ALIGN_MALLOC_DATA
47 /* align on 32-byte (256-bit) boundary */
48 x = safe_malloc_add_2op_(bytes, /*+*/31);
49 #ifdef SIZEOF_VOIDP
50 #if SIZEOF_VOIDP == 4
51 /* could do *aligned_address = x + ((unsigned) (32 - (((unsigned)x) & 31))) & 31; */
52 *aligned_address = (void*)(((unsigned)x + 31) & -32);
53 #elif SIZEOF_VOIDP == 8
54 *aligned_address = (void*)(((FLAC__uint64)x + 31) & (FLAC__uint64)(-((FLAC__int64)32)));
55 #else
56 # error Unsupported sizeof(void*)
57 #endif
58 #else
59 /* there's got to be a better way to do this right for all archs */
60 if(sizeof(void*) == sizeof(unsigned))
61 *aligned_address = (void*)(((unsigned)x + 31) & -32);
62 else if(sizeof(void*) == sizeof(FLAC__uint64))
63 *aligned_address = (void*)(((FLAC__uint64)x + 31) & (FLAC__uint64)(-((FLAC__int64)32)));
64 else
65 return 0;
66 #endif
67 #else
68 x = safe_malloc_(bytes);
69 *aligned_address = x;
70 #endif
71 return x;
72 }
73
FLAC__memory_alloc_aligned_int32_array(size_t elements,FLAC__int32 ** unaligned_pointer,FLAC__int32 ** aligned_pointer)74 FLAC__bool FLAC__memory_alloc_aligned_int32_array(size_t elements, FLAC__int32 **unaligned_pointer, FLAC__int32 **aligned_pointer)
75 {
76 FLAC__int32 *pu; /* unaligned pointer */
77 union { /* union needed to comply with C99 pointer aliasing rules */
78 FLAC__int32 *pa; /* aligned pointer */
79 void *pv; /* aligned pointer alias */
80 } u;
81
82 FLAC__ASSERT(elements > 0);
83 FLAC__ASSERT(0 != unaligned_pointer);
84 FLAC__ASSERT(0 != aligned_pointer);
85 FLAC__ASSERT(unaligned_pointer != aligned_pointer);
86
87 if(elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
88 return false;
89
90 pu = (FLAC__int32*)FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
91 if(0 == pu) {
92 return false;
93 }
94 else {
95 if(*unaligned_pointer != 0)
96 free(*unaligned_pointer);
97 *unaligned_pointer = pu;
98 *aligned_pointer = u.pa;
99 return true;
100 }
101 }
102
103
FLAC__memory_alloc_aligned_uint32_array(size_t elements,FLAC__uint32 ** unaligned_pointer,FLAC__uint32 ** aligned_pointer)104 FLAC__bool FLAC__memory_alloc_aligned_uint32_array(size_t elements, FLAC__uint32 **unaligned_pointer, FLAC__uint32 **aligned_pointer)
105 {
106 FLAC__uint32 *pu; /* unaligned pointer */
107 union { /* union needed to comply with C99 pointer aliasing rules */
108 FLAC__uint32 *pa; /* aligned pointer */
109 void *pv; /* aligned pointer alias */
110 } u;
111
112 FLAC__ASSERT(elements > 0);
113 FLAC__ASSERT(0 != unaligned_pointer);
114 FLAC__ASSERT(0 != aligned_pointer);
115 FLAC__ASSERT(unaligned_pointer != aligned_pointer);
116
117 if(elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
118 return false;
119
120 pu = (FLAC__uint32*)FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
121 if(0 == pu) {
122 return false;
123 }
124 else {
125 if(*unaligned_pointer != 0)
126 free(*unaligned_pointer);
127 *unaligned_pointer = pu;
128 *aligned_pointer = u.pa;
129 return true;
130 }
131 }
132
FLAC__memory_alloc_aligned_uint64_array(size_t elements,FLAC__uint64 ** unaligned_pointer,FLAC__uint64 ** aligned_pointer)133 FLAC__bool FLAC__memory_alloc_aligned_uint64_array(size_t elements, FLAC__uint64 **unaligned_pointer, FLAC__uint64 **aligned_pointer)
134 {
135 FLAC__uint64 *pu; /* unaligned pointer */
136 union { /* union needed to comply with C99 pointer aliasing rules */
137 FLAC__uint64 *pa; /* aligned pointer */
138 void *pv; /* aligned pointer alias */
139 } u;
140
141 FLAC__ASSERT(elements > 0);
142 FLAC__ASSERT(0 != unaligned_pointer);
143 FLAC__ASSERT(0 != aligned_pointer);
144 FLAC__ASSERT(unaligned_pointer != aligned_pointer);
145
146 if(elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
147 return false;
148
149 pu = (FLAC__uint64*)FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
150 if(0 == pu) {
151 return false;
152 }
153 else {
154 if(*unaligned_pointer != 0)
155 free(*unaligned_pointer);
156 *unaligned_pointer = pu;
157 *aligned_pointer = u.pa;
158 return true;
159 }
160 }
161
FLAC__memory_alloc_aligned_unsigned_array(size_t elements,unsigned ** unaligned_pointer,unsigned ** aligned_pointer)162 FLAC__bool FLAC__memory_alloc_aligned_unsigned_array(size_t elements, unsigned **unaligned_pointer, unsigned **aligned_pointer)
163 {
164 unsigned *pu; /* unaligned pointer */
165 union { /* union needed to comply with C99 pointer aliasing rules */
166 unsigned *pa; /* aligned pointer */
167 void *pv; /* aligned pointer alias */
168 } u;
169
170 FLAC__ASSERT(elements > 0);
171 FLAC__ASSERT(0 != unaligned_pointer);
172 FLAC__ASSERT(0 != aligned_pointer);
173 FLAC__ASSERT(unaligned_pointer != aligned_pointer);
174
175 if(elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
176 return false;
177
178 pu = (unsigned*)FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
179 if(0 == pu) {
180 return false;
181 }
182 else {
183 if(*unaligned_pointer != 0)
184 free(*unaligned_pointer);
185 *unaligned_pointer = pu;
186 *aligned_pointer = u.pa;
187 return true;
188 }
189 }
190
191 #ifndef FLAC__INTEGER_ONLY_LIBRARY
192
FLAC__memory_alloc_aligned_real_array(size_t elements,FLAC__real ** unaligned_pointer,FLAC__real ** aligned_pointer)193 FLAC__bool FLAC__memory_alloc_aligned_real_array(size_t elements, FLAC__real **unaligned_pointer, FLAC__real **aligned_pointer)
194 {
195 FLAC__real *pu; /* unaligned pointer */
196 union { /* union needed to comply with C99 pointer aliasing rules */
197 FLAC__real *pa; /* aligned pointer */
198 void *pv; /* aligned pointer alias */
199 } u;
200
201 FLAC__ASSERT(elements > 0);
202 FLAC__ASSERT(0 != unaligned_pointer);
203 FLAC__ASSERT(0 != aligned_pointer);
204 FLAC__ASSERT(unaligned_pointer != aligned_pointer);
205
206 if(elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
207 return false;
208
209 pu = (FLAC__real*)FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
210 if(0 == pu) {
211 return false;
212 }
213 else {
214 if(*unaligned_pointer != 0)
215 free(*unaligned_pointer);
216 *unaligned_pointer = pu;
217 *aligned_pointer = u.pa;
218 return true;
219 }
220 }
221
222 #endif
223