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
|
/* $OpenBSD: strings.c,v 1.4 2010/01/12 23:22:06 nicm Exp $ */
/****************************************************************************
* Copyright (c) 2000-2003,2007 Free Software Foundation, Inc. *
* *
* Permission is hereby granted, free of charge, to any person obtaining a *
* copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, distribute with modifications, sublicense, and/or sell *
* copies of the Software, and to permit persons to whom the Software is *
* furnished to do so, subject to the following conditions: *
* *
* The above copyright notice and this permission notice shall be included *
* in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
* IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
* DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
* OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
* THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
* *
* Except as contained in this notice, the name(s) of the above copyright *
* holders shall not be used in advertising or otherwise to promote the *
* sale, use or other dealings in this Software without prior written *
* authorization. *
****************************************************************************/
/****************************************************************************
* Author: Thomas E. Dickey *
****************************************************************************/
/*
** lib_mvcur.c
**/
#include <curses.priv.h>
MODULE_ID("$Id: strings.c,v 1.4 2010/01/12 23:22:06 nicm Exp $")
/****************************************************************************
* Useful string functions (especially for mvcur)
****************************************************************************/
#if !HAVE_STRSTR
NCURSES_EXPORT(char *)
_nc_strstr(const char *haystack, const char *needle)
{
size_t len1 = strlen(haystack);
size_t len2 = strlen(needle);
char *result = 0;
while ((len1 != 0) && (len1-- >= len2)) {
if (!strncmp(haystack, needle, len2)) {
result = (char *) haystack;
break;
}
haystack++;
}
return result;
}
#endif
/*
* Initialize the descriptor so we can append to it. Note that 'src' may
* be a null pointer (see _nc_str_null), so the corresponding strcat and
* strcpy calls have to allow for this.
*/
NCURSES_EXPORT(string_desc *)
_nc_str_init(string_desc * dst, char *src, size_t len)
{
if (dst != 0) {
dst->s_head = src;
dst->s_tail = src;
dst->s_size = len - 1;
dst->s_init = dst->s_size;
if (src != 0)
*src = 0;
}
return dst;
}
/*
* Initialize the descriptor for only tracking the amount of memory used.
*/
NCURSES_EXPORT(string_desc *)
_nc_str_null(string_desc * dst, size_t len)
{
return _nc_str_init(dst, 0, len);
}
/*
* Copy a descriptor
*/
NCURSES_EXPORT(string_desc *)
_nc_str_copy(string_desc * dst, string_desc * src)
{
*dst = *src;
return dst;
}
/*
* Replaces strcat into a fixed buffer, returning false on failure.
*/
NCURSES_EXPORT(bool)
_nc_safe_strcat(string_desc * dst, const char *src)
{
if (src != 0) {
size_t len = strlen(src);
if (len < dst->s_size) {
if (dst->s_tail != 0) {
strlcpy(dst->s_tail, src, dst->s_size);
dst->s_tail += len;
}
dst->s_size -= len;
return TRUE;
}
}
return FALSE;
}
/*
* Replaces strcpy into a fixed buffer, returning false on failure.
*/
NCURSES_EXPORT(bool)
_nc_safe_strcpy(string_desc * dst, const char *src)
{
if (src != 0) {
size_t len = strlen(src);
if (len < dst->s_size) {
if (dst->s_head != 0) {
strlcpy(dst->s_head, src, dst->s_size);
dst->s_tail = dst->s_head + len;
}
dst->s_size = dst->s_init - len;
return TRUE;
}
}
return FALSE;
}
|
