1 /* xmalloc.c -- safe versions of malloc and realloc */ 2 3 /* Copyright (C) 1991 Free Software Foundation, Inc. 4 5 This file is part of GNU Readline, a library for reading lines 6 of text with interactive input and history editing. 7 8 Readline is free software; you can redistribute it and/or modify it 9 under the terms of the GNU General Public License as published by the 10 Free Software Foundation; either version 2, or (at your option) any 11 later version. 12 13 Readline is distributed in the hope that it will be useful, but 14 WITHOUT ANY WARRANTY; without even the implied warranty of 15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16 General Public License for more details. 17 18 You should have received a copy of the GNU General Public License 19 along with Readline; see the file COPYING. If not, write to the Free 20 Software Foundation, 59 Temple Place, Suite 330, Boston, MA 02111 USA. */ 21 #define READLINE_LIBRARY 22 23 #if defined (HAVE_CONFIG_H) 24 #include <config.h> 25 #endif 26 27 #include <stdio.h> 28 29 #if defined (HAVE_STDLIB_H) 30 # include <stdlib.h> 31 #else 32 # include "ansi_stdlib.h" 33 #endif /* HAVE_STDLIB_H */ 34 35 #include "xmalloc.h" 36 37 /* **************************************************************** */ 38 /* */ 39 /* Memory Allocation and Deallocation. */ 40 /* */ 41 /* **************************************************************** */ 42 43 static void 44 memory_error_and_abort (fname) 45 char *fname; 46 { 47 fprintf (stderr, "%s: out of virtual memory\n", fname); 48 exit (2); 49 } 50 51 /* Return a pointer to free()able block of memory large enough 52 to hold BYTES number of bytes. If the memory cannot be allocated, 53 print an error message and abort. */ 54 char * 55 xmalloc (bytes) 56 int bytes; 57 { 58 char *temp; 59 60 temp = (char *)malloc (bytes); 61 if (temp == 0) 62 memory_error_and_abort ("xmalloc"); 63 return (temp); 64 } 65 66 char * 67 xrealloc (pointer, bytes) 68 PTR_T pointer; 69 int bytes; 70 { 71 char *temp; 72 73 temp = pointer ? (char *)realloc (pointer, bytes) : (char *)malloc (bytes); 74 75 if (temp == 0) 76 memory_error_and_abort ("xrealloc"); 77 return (temp); 78 } 79 80 /* Use this as the function to call when adding unwind protects so we 81 don't need to know what free() returns. */ 82 void 83 xfree (string) 84 PTR_T string; 85 { 86 if (string) 87 free (string); 88 } 89