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
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
|
/*
* Bindle Binaries Tools
* Copyright (C) 2022 David M. Syzdek <david@syzdek.net>.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* * Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* * Neither the name of David M. Syzdek nor the
* names of its contributors may be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL DAVID M. SYZDEK BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#define _LIB_LIBBINDLE_LUTF8_C 1
#include "lutf8.h"
///////////////
// //
// Headers //
// //
///////////////
// MARK: - Headers
#include <stdlib.h>
#include <string.h>
#include <strings.h>
#include <unistd.h>
#include <assert.h>
///////////////////
// //
// Definitions //
// //
///////////////////
// MARK: - Definitions
//////////////////
// //
// Prototypes //
// //
//////////////////
// MARK: - Prototypes
/////////////////
// //
// Functions //
// //
/////////////////
// MARK: - Functions
size_t
bindle_utf8len(
const char * s )
{
const uint8_t * b;
size_t l;
size_t p;
b = (const uint8_t *) s;
l = 0;
for(p = 0; (b[p] != 0x00); p++)
if ((b[p] & 0xC0) != 0x80)
l++;
return(l);
}
size_t
bindle_utf8nlen(
const char * s,
size_t maxlen )
{
const uint8_t * b;
size_t l;
size_t p;
b = (const uint8_t *) s;
l = 0;
for(p = 0; ((b[p] != 0x00) && (p < maxlen)); p++)
if ((b[p] & 0xC0) != 0x80)
l++;
return(l);
}
// UTF-8 Description Table:
// Bits First Last Bytes Byte 0 Byte 1 Byte 2 Byte 3 Byte 4 Byte 5
// 7 U+0000 U+007F 1 0xxxxxxx
// 0 N/A N/A 10xxxxxx
// 11 U+0080 U+07FF 2 110xxxxx 10xxxxxx
// 16 U+0800 U+FFFF 3 1110xxxx 10xxxxxx 10xxxxxx
// 21 U+10000 U+1FFFFF 4 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx
// 26 U+200000 U+3FFFFFF 5 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
// 31 U+4000000 U+7FFFFFFF 6 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx
ssize_t
bindle_utf8test(
const char * s,
size_t maxlen )
{
const uint8_t * buff;
ssize_t bit;
ssize_t byte;
ssize_t width;
ssize_t len;
ssize_t pos;
buff = (const uint8_t *) s;
len = 0;
for(pos = 0; ((buff[pos] != 0x00) && (pos < ((ssize_t)maxlen))); pos++)
{
// determines character width (byte size)
width = 1;
for(bit = 0; ((bit < 8) && (width == 1)); bit++)
if (((buff[pos] << bit) & 0x80) == 0x00)
width = bit;
// only continuation bytes have a calculated width of 1
if (width == 1)
return(-1);
// verify that UTF-8 string is not longer than buffer
if ((pos+width) >= ((ssize_t)maxlen))
return(-1);
// skip continuation bits
for (byte = 1; byte < width; byte++)
{
pos++;
if ((buff[pos] & 0xC0) != 0x80)
return(-1);
};
len++;
};
return(len);
}
/* end of source */
|
