| 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 1, 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, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 21 | |
| 22 | #if defined (ALREADY_HAVE_XMALLOC) |
| 23 | #else |
| 24 | #include <stdio.h> |
| 25 | |
| 26 | #if defined (HAVE_STDLIB_H) |
| 27 | # include <stdlib.h> |
| 28 | #endif /* HAVE_STDLIB_H */ |
| 29 | |
| 30 | static void memory_error_and_abort (); |
| 31 | |
| 32 | /* **************************************************************** */ |
| 33 | /* */ |
| 34 | /* Memory Allocation and Deallocation. */ |
| 35 | /* */ |
| 36 | /* **************************************************************** */ |
| 37 | |
| 38 | /* Return a pointer to free()able block of memory large enough |
| 39 | to hold BYTES number of bytes. If the memory cannot be allocated, |
| 40 | print an error message and abort. */ |
| 41 | char * |
| 42 | xmalloc (bytes) |
| 43 | int bytes; |
| 44 | { |
| 45 | char *temp = (char *)malloc (bytes); |
| 46 | |
| 47 | if (!temp) |
| 48 | memory_error_and_abort ("xmalloc"); |
| 49 | return (temp); |
| 50 | } |
| 51 | |
| 52 | char * |
| 53 | xrealloc (pointer, bytes) |
| 54 | char *pointer; |
| 55 | int bytes; |
| 56 | { |
| 57 | char *temp; |
| 58 | |
| 59 | if (!pointer) |
| 60 | temp = (char *)malloc (bytes); |
| 61 | else |
| 62 | temp = (char *)realloc (pointer, bytes); |
| 63 | |
| 64 | if (!temp) |
| 65 | memory_error_and_abort ("xrealloc"); |
| 66 | return (temp); |
| 67 | } |
| 68 | |
| 69 | static void |
| 70 | memory_error_and_abort (fname) |
| 71 | char *fname; |
| 72 | { |
| 73 | fprintf (stderr, "%s: Out of virtual memory!\n", fname); |
| 74 | abort (); |
| 75 | } |
| 76 | #endif /* !ALREADY_HAVE_XMALLOC */ |