| 1 | /* xmalloc.c -- safe versions of malloc and realloc */ |
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| 2 | |
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| 3 | /* Copyright (C) 1991 Free Software Foundation, Inc. |
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| 4 | |
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| 5 | This file is part of GNU Readline, a library for reading lines |
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| 6 | of text with interactive input and history editing. |
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| 7 | |
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| 8 | Readline is free software; you can redistribute it and/or modify it |
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| 9 | under the terms of the GNU General Public License as published by the |
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| 10 | Free Software Foundation; either version 1, or (at your option) any |
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| 11 | later version. |
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| 12 | |
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| 13 | Readline is distributed in the hope that it will be useful, but |
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| 14 | WITHOUT ANY WARRANTY; without even the implied warranty of |
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| 15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
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| 16 | General Public License for more details. |
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| 17 | |
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| 18 | You should have received a copy of the GNU General Public License |
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| 19 | along with Readline; see the file COPYING. If not, write to the Free |
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| 20 | Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
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| 21 | |
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| 22 | #if defined (HAVE_CONFIG_H) |
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| 23 | #include <config.h> |
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| 24 | #endif |
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| 25 | |
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| 26 | #include <stdio.h> |
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| 27 | |
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| 28 | #if defined (HAVE_STDLIB_H) |
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| 29 | # include <stdlib.h> |
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| 30 | #else |
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| 31 | # include "ansi_stdlib.h" |
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| 32 | #endif /* HAVE_STDLIB_H */ |
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| 33 | |
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| 34 | static void memory_error_and_abort (); |
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| 35 | |
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| 36 | /* **************************************************************** */ |
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| 37 | /* */ |
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| 38 | /* Memory Allocation and Deallocation. */ |
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| 39 | /* */ |
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| 40 | /* **************************************************************** */ |
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| 41 | |
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| 42 | /* Return a pointer to free()able block of memory large enough |
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| 43 | to hold BYTES number of bytes. If the memory cannot be allocated, |
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| 44 | print an error message and abort. */ |
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| 45 | char * |
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| 46 | xmalloc (bytes) |
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| 47 | int bytes; |
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| 48 | { |
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| 49 | char *temp; |
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| 50 | |
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| 51 | temp = (char *)malloc (bytes); |
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| 52 | if (temp == 0) |
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| 53 | memory_error_and_abort ("xmalloc"); |
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| 54 | return (temp); |
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| 55 | } |
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| 56 | |
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| 57 | char * |
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| 58 | xrealloc (pointer, bytes) |
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| 59 | char *pointer; |
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| 60 | int bytes; |
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| 61 | { |
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| 62 | char *temp; |
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| 63 | |
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| 64 | temp = pointer ? (char *)realloc (pointer, bytes) : (char *)malloc (bytes); |
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| 65 | |
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| 66 | if (temp == 0) |
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| 67 | memory_error_and_abort ("xrealloc"); |
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| 68 | return (temp); |
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| 69 | } |
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| 70 | |
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| 71 | static void |
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| 72 | memory_error_and_abort (fname) |
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| 73 | char *fname; |
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| 74 | { |
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| 75 | fprintf (stderr, "%s: out of virtual memory\n", fname); |
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| 76 | exit (2); |
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| 77 | } |
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| 78 | |
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| 79 | /* Use this as the function to call when adding unwind protects so we |
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| 80 | don't need to know what free() returns. */ |
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| 81 | void |
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| 82 | xfree (string) |
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| 83 | char *string; |
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| 84 | { |
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| 85 | if (string) |
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| 86 | free (string); |
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| 87 | } |
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