1 /* $OpenBSD: getenv_num.c,v 1.4 2023/10/17 09:52:09 nicm Exp $ */
2
3 /****************************************************************************
4 * Copyright 2018,2020 Thomas E. Dickey *
5 * Copyright 1998-2012,2013 Free Software Foundation, Inc. *
6 * *
7 * Permission is hereby granted, free of charge, to any person obtaining a *
8 * copy of this software and associated documentation files (the *
9 * "Software"), to deal in the Software without restriction, including *
10 * without limitation the rights to use, copy, modify, merge, publish, *
11 * distribute, distribute with modifications, sublicense, and/or sell *
12 * copies of the Software, and to permit persons to whom the Software is *
13 * furnished to do so, subject to the following conditions: *
14 * *
15 * The above copyright notice and this permission notice shall be included *
16 * in all copies or substantial portions of the Software. *
17 * *
18 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS *
19 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
20 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. *
21 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, *
22 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR *
23 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR *
24 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
25 * *
26 * Except as contained in this notice, the name(s) of the above copyright *
27 * holders shall not be used in advertising or otherwise to promote the *
28 * sale, use or other dealings in this Software without prior written *
29 * authorization. *
30 ****************************************************************************/
31
32 /****************************************************************************
33 * Author: Thomas E. Dickey <dickey@clark.net> 1998 *
34 ****************************************************************************/
35
36 /*
37 * getenv_num.c -- obtain a number from the environment
38 */
39
40 #include <curses.priv.h>
41
42 MODULE_ID("$Id: getenv_num.c,v 1.4 2023/10/17 09:52:09 nicm Exp $")
43
NCURSES_EXPORT(int)44 NCURSES_EXPORT(int)
45 _nc_getenv_num(const char *name)
46 {
47 char *dst = 0;
48 char *src = getenv(name);
49 long value;
50
51 if ((src == 0)
52 || (value = strtol(src, &dst, 0)) < 0
53 || (dst == src)
54 || (*dst != '\0')
55 || (int) value < value)
56 value = -1;
57
58 return (int) value;
59 }
60
61 NCURSES_EXPORT(void)
_nc_setenv_num(const char * name,int value)62 _nc_setenv_num(const char *name, int value)
63 {
64 if (name != 0 && value >= 0) {
65 char buffer[128];
66 #if HAVE_SETENV
67 _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer)) "%d", value);
68 setenv(name, buffer, 1);
69 #elif HAVE_PUTENV
70 char *s;
71 _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer)) "%s=%d", name, value);
72 if ((s = strdup(buffer)) != 0)
73 putenv(s);
74 #else
75 #error expected setenv/putenv functions
76 #endif
77 }
78 }
79