1 /**************************************************************************** 2 * Copyright 2020 Thomas E. Dickey * 3 * Copyright 1998-2002,2012 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 * Wrapper for malloc/realloc. Standard implementations allow realloc with 36 * a null pointer, but older libraries may not (e.g., SunOS). 37 * 38 * Also if realloc fails, we discard the old memory to avoid leaks. 39 */ 40 41 #include <curses.priv.h> 42 43 MODULE_ID("$Id: doalloc.c,v 1.12 2020/02/02 23:34:34 tom Exp $") 44 45 NCURSES_EXPORT(void *) 46 _nc_doalloc(void *oldp, size_t amount) 47 { 48 void *newp; 49 50 if (oldp != 0) { 51 if ((newp = realloc(oldp, amount)) == 0) { 52 free(oldp); 53 errno = ENOMEM; /* just in case 'free' reset */ 54 } 55 } else { 56 newp = malloc(amount); 57 } 58 return newp; 59 } 60