1 /**************************************************************************** 2 * Copyright 2018,2020 Thomas E. Dickey * 3 * Copyright 1998-2012,2013 Free Software Foundation, Inc. * 4 * * 5 * Permission is hereby granted, free of charge, to any person obtaining a * 6 * copy of this software and associated documentation files (the * 7 * "Software"), to deal in the Software without restriction, including * 8 * without limitation the rights to use, copy, modify, merge, publish, * 9 * distribute, distribute with modifications, sublicense, and/or sell * 10 * copies of the Software, and to permit persons to whom the Software is * 11 * furnished to do so, subject to the following conditions: * 12 * * 13 * The above copyright notice and this permission notice shall be included * 14 * in all copies or substantial portions of the Software. * 15 * * 16 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 17 * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 18 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 19 * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 20 * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 21 * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 22 * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 23 * * 24 * Except as contained in this notice, the name(s) of the above copyright * 25 * holders shall not be used in advertising or otherwise to promote the * 26 * sale, use or other dealings in this Software without prior written * 27 * authorization. * 28 ****************************************************************************/ 29 30 /**************************************************************************** 31 * Author: Thomas E. Dickey <dickey@clark.net> 1998 * 32 ****************************************************************************/ 33 34 /* 35 * getenv_num.c -- obtain a number from the environment 36 */ 37 38 #include <curses.priv.h> 39 40 MODULE_ID("$Id: getenv_num.c,v 1.8 2020/02/02 23:34:34 tom Exp $") 41 42 NCURSES_EXPORT(int) 43 _nc_getenv_num(const char *name) 44 { 45 char *dst = 0; 46 char *src = getenv(name); 47 long value; 48 49 if ((src == 0) 50 || (value = strtol(src, &dst, 0)) < 0 51 || (dst == src) 52 || (*dst != '\0') 53 || (int) value < value) 54 value = -1; 55 56 return (int) value; 57 } 58 59 NCURSES_EXPORT(void) 60 _nc_setenv_num(const char *name, int value) 61 { 62 if (name != 0 && value >= 0) { 63 char buffer[128]; 64 #if HAVE_SETENV 65 _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer)) "%d", value); 66 setenv(name, buffer, 1); 67 #elif HAVE_PUTENV 68 char *s; 69 _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer)) "%s=%d", name, value); 70 if ((s = strdup(buffer)) != 0) 71 putenv(s); 72 #else 73 #error expected setenv/putenv functions 74 #endif 75 } 76 } 77