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
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
|
/* compat.c - Simple compatibility functions
* Copyright (C) 2006, 2007, 2009 Free Software Foundation, Inc.
*
* The origin of this code is GnuPG.
*
* This file is free software; as a special exception the author gives
* unlimited permission to copy and/or distribute it, with or without
* modifications, as long as this notice is preserved.
*
* This file is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY, to the extent permitted by law; without even the
* implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
*
* History:
* 2006-09-28 dshaw Created. Added function hextobyte from GnuPG.
* 2007-04-16 dshaw Added ascii_toupper, ascii_tolower, ascii_strcasecmp,
* ascii_strncasecmp from GnuPG.
* 2009-08-25 wk License changed by GnuPG maintainer from GPL with
* OpenSSL exception to this all permissive license.
* 2009-08-25 wk Wrote new function xstrconcat.
*/
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
#include <stdio.h>
#include <errno.h>
#include <sys/types.h>
/* We require an external malloc function named xtrymalloc. */
void *xtrymalloc (size_t n);
#ifndef DIM
#define DIM(v) (sizeof(v)/sizeof((v)[0]))
#endif
int
hextobyte (const char *s)
{
int c;
if ( *s >= '0' && *s <= '9' )
c = 16 * (*s - '0');
else if ( *s >= 'A' && *s <= 'F' )
c = 16 * (10 + *s - 'A');
else if ( *s >= 'a' && *s <= 'f' )
c = 16 * (10 + *s - 'a');
else
return -1;
s++;
if ( *s >= '0' && *s <= '9' )
c += *s - '0';
else if ( *s >= 'A' && *s <= 'F' )
c += 10 + *s - 'A';
else if ( *s >= 'a' && *s <= 'f' )
c += 10 + *s - 'a';
else
return -1;
return c;
}
int
ascii_toupper (int c)
{
if (c >= 'a' && c <= 'z')
c &= ~0x20;
return c;
}
int
ascii_tolower (int c)
{
if (c >= 'A' && c <= 'Z')
c |= 0x20;
return c;
}
int
ascii_strcasecmp (const char *a, const char *b)
{
const unsigned char *p1 = (const unsigned char *)a;
const unsigned char *p2 = (const unsigned char *)b;
unsigned char c1, c2;
if (p1 == p2)
return 0;
do
{
c1 = ascii_tolower (*p1);
c2 = ascii_tolower (*p2);
if (c1 == '\0')
break;
++p1;
++p2;
}
while (c1 == c2);
return c1 - c2;
}
int
ascii_strncasecmp (const char *a, const char *b, size_t n)
{
const unsigned char *p1 = (const unsigned char *)a;
const unsigned char *p2 = (const unsigned char *)b;
unsigned char c1, c2;
if (p1 == p2 || !n )
return 0;
do
{
c1 = ascii_tolower (*p1);
c2 = ascii_tolower (*p2);
if ( !--n || c1 == '\0')
break;
++p1;
++p2;
}
while (c1 == c2);
return c1 - c2;
}
static char *
do_strconcat (const char *s1, va_list arg_ptr)
{
const char *argv[48];
size_t argc;
size_t needed;
char *buffer, *p;
const char *r;
argc = 0;
argv[argc++] = s1;
needed = strlen (s1);
while (((argv[argc] = va_arg (arg_ptr, const char *))))
{
needed += strlen (argv[argc]);
if (argc >= DIM (argv)-1)
{
errno = EINVAL;
return NULL;
}
argc++;
}
needed++;
buffer = xtrymalloc (needed);
if (buffer)
{
for (p = buffer, argc=0; argv[argc]; argc++)
{
for (r = argv[argc]; *r; )
*p++ = *r++;
*p = 0;
}
}
return buffer;
}
/* Concatenate the string S1 with all the following strings up to a
NULL. Returns a malloced buffer. */
char *
xstrconcat (const char *s1, ...)
{
va_list arg_ptr;
char *result;
if (!s1)
{
result = xtrymalloc (1);
if (result)
*result = 0;
}
else
{
va_start (arg_ptr, s1);
result = do_strconcat (s1, arg_ptr);
va_end (arg_ptr);
}
if (!result)
{
if (errno == EINVAL)
fputs ("\nfatal: too many args for xstrconcat\n", stderr);
else
fputs ("\nfatal: out of memory\n", stderr);
exit (2);
}
return result;
}
|
