1 | /* xmalloc.c -- malloc with out of memory checking
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2 | Copyright (C) 1990, 91, 92, 93, 94 Free Software Foundation, Inc.
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3 |
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4 | This program is free software; you can redistribute it and/or modify
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5 | it under the terms of the GNU General Public License as published by
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6 | the Free Software Foundation; either version 2, or (at your option)
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7 | any later version.
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8 |
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9 | This program is distributed in the hope that it will be useful,
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10 | but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 | GNU General Public License for more details.
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13 |
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14 | You should have received a copy of the GNU General Public License
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15 | along with this program; if not, write to the Free Software
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16 | Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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17 |
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18 | #ifdef HAVE_CONFIG_H
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19 | # ifdef __WIN32__ /* [RPAP - Feb 97: WIN32 Port] */
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20 | # include <win32cfg.h>
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21 | # else
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22 | # include <sysfuncs.h>
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23 | # endif
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24 | #endif
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25 |
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26 | #if __STDC__
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27 | #define VOID void
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28 | #else
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29 | #define VOID char
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30 | #endif
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31 |
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32 | #include <sys/types.h>
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33 |
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34 | #if STDC_HEADERS
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35 | #include <stdlib.h>
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36 | #else
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37 | VOID *malloc ();
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38 | VOID *realloc ();
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39 | void free ();
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40 | #endif
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41 |
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42 | /* This is for other GNU distributions with internationalized messages.
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43 | The GNU C Library itself does not yet support such messages. */
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44 | #if HAVE_LIBINTL_H
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45 | # include <libintl.h>
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46 | #else
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47 | # define gettext(msgid) (msgid)
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48 | #endif
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49 |
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50 | #ifndef EXIT_FAILURE
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51 | #define EXIT_FAILURE 1
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52 | #endif
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53 |
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54 | /* Exit value when the requested amount of memory is not available.
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55 | The caller may set it to some other value. */
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56 | int xmalloc_exit_failure = EXIT_FAILURE;
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57 |
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58 | #if defined(__WIN32__)
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59 | void error (int, int, const char *, ...);
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60 | #else
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61 | #if __STDC__ && (HAVE_VPRINTF || HAVE_DOPRNT)
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62 | void error (int, int, const char *, ...);
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63 | #else
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64 | void error (int, int, char *, char *, char *, char *, char *, char *, char *, char *, char *);
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65 | #endif
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66 | #endif;
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67 |
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68 | static VOID *
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69 | fixup_null_alloc (n)
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70 | size_t n;
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71 | {
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72 | VOID *p;
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73 |
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74 | p = 0;
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75 | if (n == 0)
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76 | p = malloc ((size_t) 1);
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77 | if (p == 0)
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78 | error (xmalloc_exit_failure, 0, gettext ("Memory exhausted"));
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79 | return p;
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80 | }
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81 |
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82 | /* Allocate N bytes of memory dynamically, with error checking. */
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83 |
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84 | VOID *
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85 | xmalloc (n)
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86 | size_t n;
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87 | {
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88 | VOID *p;
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89 |
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90 | p = malloc (n);
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91 | if (p == 0)
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92 | p = fixup_null_alloc (n);
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93 | return p;
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94 | }
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95 |
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96 | /* Change the size of an allocated block of memory P to N bytes,
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97 | with error checking.
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98 | If P is NULL, run xmalloc. */
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99 |
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100 | VOID *
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101 | xrealloc (p, n)
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102 | VOID *p;
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103 | size_t n;
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104 | {
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105 | if (p == 0)
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106 | return xmalloc (n);
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107 | p = realloc (p, n);
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108 | if (p == 0)
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109 | p = fixup_null_alloc (n);
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110 | return p;
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111 | }
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