1 /* $Source: /u/mark/src/pax/RCS/mem.c,v $
5 * mem.c - memory allocation and manipulation functions
9 * These routines are provided for higher level handling of the UNIX
10 * memory allocation functions.
14 * Mark H. Colburn, NAPS International (mark@jhereg.mn.org)
17 * Sponsored by The USENIX Association for public distribution.
19 * Copyright (c) 1989 Mark H. Colburn.
20 * All rights reserved.
22 * Redistribution and use in source and binary forms are permitted
23 * provided that the above copyright notice is duplicated in all such
24 * forms and that any documentation, advertising materials, and other
25 * materials related to such distribution and use acknowledge that the
26 * software was developed * by Mark H. Colburn and sponsored by The
29 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
30 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
31 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
34 * Revision 1.2 89/02/12 10:04:53 mark
37 * Revision 1.1 88/12/23 18:02:17 mark
43 static char *ident = "$Id: mem.c,v 1.2 89/02/12 10:04:53 mark Exp $";
44 static char *copyright = "Copyright (c) 1989 Mark H. Colburn.\nAll rights reserved.\n";
53 /* mem_get - allocate memory
57 * Mem_get attempts to allocate a block of memory using the malloc
58 * function call. In the event that the memory is not available,
59 * mem_get will display an "Out of memory" message for the user
60 * the first time it encounters the an out of memory situation.
61 * Subsequent calls to mem_get may fail, but no message will be
66 * uint len - The amount of memory to allocate
70 * Normally returns the pointer to the newly allocated memory. If
71 * an error occurs, NULL is returned, and an error message is
76 * ENOMEM No memory is available
81 char *mem_get(uint len)
86 uint len; /* amount of memory to get */
91 static short outofmem = 0;
93 if ((mem = (char *)malloc(len)) == (char *)NULL && !outofmem) {
95 warn("mem_get()", "Out of memory");
101 /* mem_str - duplicate a string into dynamic memory
105 * Mem_str attempts to make a copy of string. It allocates space for
106 * the string, and if the allocation was successfull, copies the old
107 * string into the newly allocated space.
111 * char *str - string to make a copy of
115 * Normally returns a pointer to a new string at least as large
116 * as strlen(str) + 1, which contains a copy of the the data
117 * passed in str, plus a null terminator. Returns (char *)NULL
118 * if enough memory to make a copy of str is not available.
123 char *mem_str(char *str)
128 char *str; /* string to make a copy of */
134 if (mem = mem_get((uint) strlen(str) + 1)) {