1/*
2** Copyright (c) 2001-2007 Expat maintainers.
3**
4** Permission is hereby granted, free of charge, to any person obtaining
5** a copy of this software and associated documentation files (the
6** "Software"), to deal in the Software without restriction, including
7** without limitation the rights to use, copy, modify, merge, publish,
8** distribute, sublicense, and/or sell copies of the Software, and to
9** permit persons to whom the Software is furnished to do so, subject to
10** the following conditions:
11**
12** The above copyright notice and this permission notice shall be included
13** in all copies or substantial portions of the Software.
14**
15** THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
16** EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
17** MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
18** IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
19** CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
20** TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
21** SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
22*/
23
24#include <stdlib.h>
25#include <exec/memory.h>
26#include <proto/exec.h>
27#include <proto/utility.h>
28
29void * malloc (size_t len)
30{
31	uint32 size = sizeof(uint32) + len;
32
33	uint32 *mem = AllocMem(size, MEMF_SHARED);
34	if ( mem != 0 )  {
35		*mem = size;
36		++mem;
37	}
38
39	return mem;
40}
41
42
43void * realloc (void * mem, size_t len2)
44{
45	if ( mem == 0 )  {
46		return malloc(len2);
47	}
48
49	if ( len2 == 0 )  {
50		free(mem);
51		return 0;
52	}
53
54	void * new_mem = malloc(len2);
55	if ( new_mem == 0 )  {
56		return 0;
57	}
58
59	uint32 mem_size = *(((uint32*)mem) - 1);
60	CopyMem(mem, new_mem, mem_size);
61	free(mem);
62
63	return new_mem;
64}
65
66
67void free (void * mem)
68{
69	if ( mem != 0 )  {
70		uint32 * size_ptr = ((uint32*)mem) - 1;
71		FreeMem(size_ptr, *size_ptr);
72	}
73}
74
75
76int memcmp (const void * a, const void * b, size_t len)
77{
78	size_t i;
79	int diff;
80
81	for ( i = 0; i < len; ++i )  {
82		diff = *((uint8 *)a++) - *((uint8 *)b++);
83		if ( diff )  {
84			return diff;
85		}
86	}
87
88	return 0;
89}
90
91
92void * memcpy (void * t, const void * a, size_t len)
93{
94	CopyMem((APTR)a, t, len);
95	return t;
96}
97
98
99void * memmove (void * t1, const void * t2, size_t len)
100{
101	MoveMem((APTR)t2, t1, len);
102	return t1;
103}
104
105
106void * memset (void * t, int c, size_t len)
107{
108	return SetMem(t, c, len);
109}
110