| 65 |
cmwslw |
1 |
/* ucl_str.c -- string functions for the the UCL library
|
|
|
2 |
|
|
|
3 |
This file is part of the UCL data compression library.
|
|
|
4 |
|
|
|
5 |
Copyright (C) 1996-2002 Markus Franz Xaver Johannes Oberhumer
|
|
|
6 |
All Rights Reserved.
|
|
|
7 |
|
|
|
8 |
The UCL library is free software; you can redistribute it and/or
|
|
|
9 |
modify it under the terms of the GNU General Public License as
|
|
|
10 |
published by the Free Software Foundation; either version 2 of
|
|
|
11 |
the License, or (at your option) any later version.
|
|
|
12 |
|
|
|
13 |
The UCL library is distributed in the hope that it will be useful,
|
|
|
14 |
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
|
15 |
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
|
16 |
GNU General Public License for more details.
|
|
|
17 |
|
|
|
18 |
You should have received a copy of the GNU General Public License
|
|
|
19 |
along with the UCL library; see the file COPYING.
|
|
|
20 |
If not, write to the Free Software Foundation, Inc.,
|
|
|
21 |
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
|
|
|
22 |
|
|
|
23 |
Markus F.X.J. Oberhumer
|
|
|
24 |
<markus@oberhumer.com>
|
|
|
25 |
http://www.oberhumer.com/opensource/ucl/
|
|
|
26 |
*/
|
|
|
27 |
|
|
|
28 |
|
|
|
29 |
#include "ucl_conf.h"
|
|
|
30 |
|
|
|
31 |
#undef ucl_memcmp
|
|
|
32 |
#undef ucl_memcpy
|
|
|
33 |
#undef ucl_memmove
|
|
|
34 |
#undef ucl_memset
|
|
|
35 |
|
|
|
36 |
|
|
|
37 |
/***********************************************************************
|
|
|
38 |
// slow but portable <string.h> stuff, only used in assertions
|
|
|
39 |
************************************************************************/
|
|
|
40 |
|
|
|
41 |
UCL_PUBLIC(int)
|
|
|
42 |
ucl_memcmp(const ucl_voidp s1, const ucl_voidp s2, ucl_uint len)
|
|
|
43 |
{
|
|
|
44 |
#if (UCL_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMCMP)
|
|
|
45 |
return memcmp(s1,s2,len);
|
|
|
46 |
#else
|
|
|
47 |
const ucl_byte *p1 = (const ucl_byte *) s1;
|
|
|
48 |
const ucl_byte *p2 = (const ucl_byte *) s2;
|
|
|
49 |
int d;
|
|
|
50 |
|
|
|
51 |
if (len > 0) do
|
|
|
52 |
{
|
|
|
53 |
d = *p1 - *p2;
|
|
|
54 |
if (d != 0)
|
|
|
55 |
return d;
|
|
|
56 |
p1++;
|
|
|
57 |
p2++;
|
|
|
58 |
}
|
|
|
59 |
while (--len > 0);
|
|
|
60 |
return 0;
|
|
|
61 |
#endif
|
|
|
62 |
}
|
|
|
63 |
|
|
|
64 |
|
|
|
65 |
UCL_PUBLIC(ucl_voidp)
|
|
|
66 |
ucl_memcpy(ucl_voidp dest, const ucl_voidp src, ucl_uint len)
|
|
|
67 |
{
|
|
|
68 |
#if (UCL_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMCPY)
|
|
|
69 |
return memcpy(dest,src,len);
|
|
|
70 |
#else
|
|
|
71 |
ucl_byte *p1 = (ucl_byte *) dest;
|
|
|
72 |
const ucl_byte *p2 = (const ucl_byte *) src;
|
|
|
73 |
|
|
|
74 |
if (len <= 0 || p1 == p2)
|
|
|
75 |
return dest;
|
|
|
76 |
do
|
|
|
77 |
*p1++ = *p2++;
|
|
|
78 |
while (--len > 0);
|
|
|
79 |
return dest;
|
|
|
80 |
#endif
|
|
|
81 |
}
|
|
|
82 |
|
|
|
83 |
|
|
|
84 |
UCL_PUBLIC(ucl_voidp)
|
|
|
85 |
ucl_memmove(ucl_voidp dest, const ucl_voidp src, ucl_uint len)
|
|
|
86 |
{
|
|
|
87 |
#if (UCL_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMMOVE)
|
|
|
88 |
return memmove(dest,src,len);
|
|
|
89 |
#else
|
|
|
90 |
ucl_byte *p1 = (ucl_byte *) dest;
|
|
|
91 |
const ucl_byte *p2 = (const ucl_byte *) src;
|
|
|
92 |
|
|
|
93 |
if (len <= 0 || p1 == p2)
|
|
|
94 |
return dest;
|
|
|
95 |
|
|
|
96 |
if (p1 < p2)
|
|
|
97 |
{
|
|
|
98 |
do
|
|
|
99 |
*p1++ = *p2++;
|
|
|
100 |
while (--len > 0);
|
|
|
101 |
}
|
|
|
102 |
else
|
|
|
103 |
{
|
|
|
104 |
p1 += len;
|
|
|
105 |
p2 += len;
|
|
|
106 |
do
|
|
|
107 |
*--p1 = *--p2;
|
|
|
108 |
while (--len > 0);
|
|
|
109 |
}
|
|
|
110 |
return dest;
|
|
|
111 |
#endif
|
|
|
112 |
}
|
|
|
113 |
|
|
|
114 |
|
|
|
115 |
UCL_PUBLIC(ucl_voidp)
|
|
|
116 |
ucl_memset(ucl_voidp s, int c, ucl_uint len)
|
|
|
117 |
{
|
|
|
118 |
#if (UCL_UINT_MAX <= SIZE_T_MAX) && defined(HAVE_MEMSET)
|
|
|
119 |
return memset(s,c,len);
|
|
|
120 |
#else
|
|
|
121 |
ucl_byte *p = (ucl_byte *) s;
|
|
|
122 |
|
|
|
123 |
if (len > 0) do
|
|
|
124 |
*p++ = UCL_BYTE(c);
|
|
|
125 |
while (--len > 0);
|
|
|
126 |
return s;
|
|
|
127 |
#endif
|
|
|
128 |
}
|
|
|
129 |
|
|
|
130 |
|
|
|
131 |
/*
|
|
|
132 |
vi:ts=4:et
|
|
|
133 |
*/
|