1 /****************************************************************************
2 * Copyright (c) 2000-2003,2007 Free Software Foundation, Inc. *
4 * Permission is hereby granted, free of charge, to any person obtaining a *
5 * 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, distribute with modifications, sublicense, and/or sell *
9 * copies of the Software, and to permit persons to whom the Software is *
10 * furnished to do so, subject to the following conditions: *
12 * The above copyright notice and this permission notice shall be included *
13 * in all copies or substantial portions of the Software. *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
16 * 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 ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
19 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
20 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
21 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
23 * Except as contained in this notice, the name(s) of the above copyright *
24 * holders shall not be used in advertising or otherwise to promote the *
25 * sale, use or other dealings in this Software without prior written *
27 ****************************************************************************/
29 /****************************************************************************
30 * Author: Thomas E. Dickey *
31 ****************************************************************************/
37 #include <curses.priv.h>
39 MODULE_ID("$Id: strings.c,v 1.6 2007/08/11 17:12:17 tom Exp $")
41 /****************************************************************************
42 * Useful string functions (especially for mvcur)
43 ****************************************************************************/
46 NCURSES_EXPORT(char *)
47 _nc_strstr(const char *haystack
, const char *needle
)
49 size_t len1
= strlen(haystack
);
50 size_t len2
= strlen(needle
);
53 while ((len1
!= 0) && (len1
-- >= len2
)) {
54 if (!strncmp(haystack
, needle
, len2
)) {
55 result
= (char *) haystack
;
65 * Initialize the descriptor so we can append to it. Note that 'src' may
66 * be a null pointer (see _nc_str_null), so the corresponding strcat and
67 * strcpy calls have to allow for this.
69 NCURSES_EXPORT(string_desc
*)
70 _nc_str_init(string_desc
* dst
, char *src
, size_t len
)
75 dst
->s_size
= len
- 1;
76 dst
->s_init
= dst
->s_size
;
84 * Initialize the descriptor for only tracking the amount of memory used.
86 NCURSES_EXPORT(string_desc
*)
87 _nc_str_null(string_desc
* dst
, size_t len
)
89 return _nc_str_init(dst
, 0, len
);
95 NCURSES_EXPORT(string_desc
*)
96 _nc_str_copy(string_desc
* dst
, string_desc
* src
)
103 * Replaces strcat into a fixed buffer, returning false on failure.
106 _nc_safe_strcat(string_desc
* dst
, const char *src
)
109 size_t len
= strlen(src
);
111 if (len
< dst
->s_size
) {
112 if (dst
->s_tail
!= 0) {
113 strcpy(dst
->s_tail
, src
);
124 * Replaces strcpy into a fixed buffer, returning false on failure.
127 _nc_safe_strcpy(string_desc
* dst
, const char *src
)
130 size_t len
= strlen(src
);
132 if (len
< dst
->s_size
) {
133 if (dst
->s_head
!= 0) {
134 strcpy(dst
->s_head
, src
);
135 dst
->s_tail
= dst
->s_head
+ len
;
137 dst
->s_size
= dst
->s_init
- len
;