1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
|
/* -*- Mode: c; tab-width: 8; c-basic-offset: 4; indent-tabs-mode: t; -*- */
/* Cairo - a vector graphics library with display and print output
*
* Copyright © 2007 Mozilla Corporation
*
* This library is free software; you can redistribute it and/or
* modify it either under the terms of the GNU Lesser General Public
* License version 2.1 as published by the Free Software Foundation
* (the "LGPL") or, at your option, under the terms of the Mozilla
* Public License Version 1.1 (the "MPL"). If you do not alter this
* notice, a recipient may use your version of this file under either
* the MPL or the LGPL.
*
* You should have received a copy of the LGPL along with this library
* in the file COPYING-LGPL-2.1; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
* You should have received a copy of the MPL along with this library
* in the file COPYING-MPL-1.1
*
* The contents of this file are subject to the Mozilla Public License
* Version 1.1 (the "License"); you may not use this file except in
* compliance with the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY
* OF ANY KIND, either express or implied. See the LGPL or the MPL for
* the specific language governing rights and limitations.
*
* The Original Code is the cairo graphics library.
*
* The Initial Developer of the Original Code is Mozilla Corporation
*
* Contributor(s):
* Vladimir Vukicevic <vladimir@pobox.com>
*/
#ifndef CAIRO_MALLOC_PRIVATE_H
#define CAIRO_MALLOC_PRIVATE_H
#include "cairo-wideint-private.h"
/**
* _cairo_malloc:
* @size: size in bytes
*
* Allocate @size memory using malloc().
* The memory should be freed using free().
* malloc is skipped, if 0 bytes are requested, and %NULL will be returned.
*
* Return value: A pointer to the newly allocated memory, or %NULL in
* case of malloc() failure or size is 0.
*/
#define _cairo_malloc(size) \
((size) ? malloc((unsigned) (size)) : NULL)
/**
* _cairo_malloc_ab:
* @n: number of elements to allocate
* @size: size of each element
*
* Allocates @n*@size memory using _cairo_malloc(), taking care to not
* overflow when doing the multiplication. Behaves much like
* calloc(), except that the returned memory is not set to zero.
* The memory should be freed using free().
*
* @size should be a constant so that the compiler can optimize
* out a constant division.
*
* Return value: A pointer to the newly allocated memory, or %NULL in
* case of malloc() failure or overflow.
*/
#define _cairo_malloc_ab(a, size) \
((size) && (unsigned) (a) >= INT32_MAX / (unsigned) (size) ? NULL : \
_cairo_malloc((unsigned) (a) * (unsigned) (size)))
/**
* _cairo_realloc_ab:
* @ptr: original pointer to block of memory to be resized
* @n: number of elements to allocate
* @size: size of each element
*
* Reallocates @ptr a block of @n*@size memory using realloc(), taking
* care to not overflow when doing the multiplication. The memory
* should be freed using free().
*
* @size should be a constant so that the compiler can optimize
* out a constant division.
*
* Return value: A pointer to the newly allocated memory, or %NULL in
* case of realloc() failure or overflow (whereupon the original block
* of memory * is left untouched).
*/
#define _cairo_realloc_ab(ptr, a, size) \
((size) && (unsigned) (a) >= INT32_MAX / (unsigned) (size) ? NULL : \
realloc(ptr, (unsigned) (a) * (unsigned) (size)))
/**
* _cairo_malloc_abc:
* @n: first factor of number of elements to allocate
* @b: second factor of number of elements to allocate
* @size: size of each element
*
* Allocates @n*@b*@size memory using _cairo_malloc(), taking care to not
* overflow when doing the multiplication. Behaves like
* _cairo_malloc_ab(). The memory should be freed using free().
*
* @size should be a constant so that the compiler can optimize
* out a constant division.
*
* Return value: A pointer to the newly allocated memory, or %NULL in
* case of malloc() failure or overflow.
*/
#define _cairo_malloc_abc(a, b, size) \
((b) && (unsigned) (a) >= INT32_MAX / (unsigned) (b) ? NULL : \
(size) && (unsigned) ((a)*(b)) >= INT32_MAX / (unsigned) (size) ? NULL : \
_cairo_malloc((unsigned) (a) * (unsigned) (b) * (unsigned) (size)))
/**
* _cairo_malloc_ab_plus_c:
* @n: number of elements to allocate
* @size: size of each element
* @k: additional size to allocate
*
* Allocates @n*@ksize+@k memory using _cairo_malloc(), taking care to not
* overflow when doing the arithmetic. Behaves like
* _cairo_malloc_ab(). The memory should be freed using free().
*
* Return value: A pointer to the newly allocated memory, or %NULL in
* case of malloc() failure or overflow.
*/
#define _cairo_malloc_ab_plus_c(n, size, k) \
((size) && (unsigned) (n) >= INT32_MAX / (unsigned) (size) ? NULL : \
(unsigned) (k) >= INT32_MAX - (unsigned) (n) * (unsigned) (size) ? NULL : \
_cairo_malloc((unsigned) (n) * (unsigned) (size) + (unsigned) (k)))
#endif /* CAIRO_MALLOC_PRIVATE_H */
|
