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 #if 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(unsigned elements,FLAC__int32 ** unaligned_pointer,FLAC__int32 ** aligned_pointer)74 FLAC__bool FLAC__memory_alloc_aligned_int32_array(unsigned 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((size_t)elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
88 return false;
89
90 pu = (FLAC__int32*)FLAC__memory_alloc_aligned(sizeof(*pu) * (size_t)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
FLAC__memory_alloc_aligned_uint32_array(unsigned elements,FLAC__uint32 ** unaligned_pointer,FLAC__uint32 ** aligned_pointer)103 FLAC__bool FLAC__memory_alloc_aligned_uint32_array(unsigned elements, FLAC__uint32 **unaligned_pointer, FLAC__uint32 **aligned_pointer)
104 {
105 FLAC__uint32 *pu; /* unaligned pointer */
106 union { /* union needed to comply with C99 pointer aliasing rules */
107 FLAC__uint32 *pa; /* aligned pointer */
108 void *pv; /* aligned pointer alias */
109 } u;
110
111 FLAC__ASSERT(elements > 0);
112 FLAC__ASSERT(0 != unaligned_pointer);
113 FLAC__ASSERT(0 != aligned_pointer);
114 FLAC__ASSERT(unaligned_pointer != aligned_pointer);
115
116 if((size_t)elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
117 return false;
118
119 pu = (FLAC__uint32*)FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
120 if(0 == pu) {
121 return false;
122 }
123 else {
124 if(*unaligned_pointer != 0)
125 free(*unaligned_pointer);
126 *unaligned_pointer = pu;
127 *aligned_pointer = u.pa;
128 return true;
129 }
130 }
131
FLAC__memory_alloc_aligned_uint64_array(unsigned elements,FLAC__uint64 ** unaligned_pointer,FLAC__uint64 ** aligned_pointer)132 FLAC__bool FLAC__memory_alloc_aligned_uint64_array(unsigned elements, FLAC__uint64 **unaligned_pointer, FLAC__uint64 **aligned_pointer)
133 {
134 FLAC__uint64 *pu; /* unaligned pointer */
135 union { /* union needed to comply with C99 pointer aliasing rules */
136 FLAC__uint64 *pa; /* aligned pointer */
137 void *pv; /* aligned pointer alias */
138 } u;
139
140 FLAC__ASSERT(elements > 0);
141 FLAC__ASSERT(0 != unaligned_pointer);
142 FLAC__ASSERT(0 != aligned_pointer);
143 FLAC__ASSERT(unaligned_pointer != aligned_pointer);
144
145 if((size_t)elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
146 return false;
147
148 pu = (FLAC__uint64*)FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
149 if(0 == pu) {
150 return false;
151 }
152 else {
153 if(*unaligned_pointer != 0)
154 free(*unaligned_pointer);
155 *unaligned_pointer = pu;
156 *aligned_pointer = u.pa;
157 return true;
158 }
159 }
160
FLAC__memory_alloc_aligned_unsigned_array(unsigned elements,unsigned ** unaligned_pointer,unsigned ** aligned_pointer)161 FLAC__bool FLAC__memory_alloc_aligned_unsigned_array(unsigned elements, unsigned **unaligned_pointer, unsigned **aligned_pointer)
162 {
163 unsigned *pu; /* unaligned pointer */
164 union { /* union needed to comply with C99 pointer aliasing rules */
165 unsigned *pa; /* aligned pointer */
166 void *pv; /* aligned pointer alias */
167 } u;
168
169 FLAC__ASSERT(elements > 0);
170 FLAC__ASSERT(0 != unaligned_pointer);
171 FLAC__ASSERT(0 != aligned_pointer);
172 FLAC__ASSERT(unaligned_pointer != aligned_pointer);
173
174 if((size_t)elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
175 return false;
176
177 pu = (unsigned*)FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
178 if(0 == pu) {
179 return false;
180 }
181 else {
182 if(*unaligned_pointer != 0)
183 free(*unaligned_pointer);
184 *unaligned_pointer = pu;
185 *aligned_pointer = u.pa;
186 return true;
187 }
188 }
189
190 #ifndef FLAC__INTEGER_ONLY_LIBRARY
191
FLAC__memory_alloc_aligned_real_array(unsigned elements,FLAC__real ** unaligned_pointer,FLAC__real ** aligned_pointer)192 FLAC__bool FLAC__memory_alloc_aligned_real_array(unsigned elements, FLAC__real **unaligned_pointer, FLAC__real **aligned_pointer)
193 {
194 FLAC__real *pu; /* unaligned pointer */
195 union { /* union needed to comply with C99 pointer aliasing rules */
196 FLAC__real *pa; /* aligned pointer */
197 void *pv; /* aligned pointer alias */
198 } u;
199
200 FLAC__ASSERT(elements > 0);
201 FLAC__ASSERT(0 != unaligned_pointer);
202 FLAC__ASSERT(0 != aligned_pointer);
203 FLAC__ASSERT(unaligned_pointer != aligned_pointer);
204
205 if((size_t)elements > SIZE_MAX / sizeof(*pu)) /* overflow check */
206 return false;
207
208 pu = (FLAC__real*)FLAC__memory_alloc_aligned(sizeof(*pu) * elements, &u.pv);
209 if(0 == pu) {
210 return false;
211 }
212 else {
213 if(*unaligned_pointer != 0)
214 free(*unaligned_pointer);
215 *unaligned_pointer = pu;
216 *aligned_pointer = u.pa;
217 return true;
218 }
219 }
220
221 #endif
222