ialloc.c revision 51cfa1a9a96cad34675a6415fe86dfdf3f525bb6 
1/*
2** This file is in the public domain, so clarified as of
3** 2006-07-17 by Arthur David Olson.
4*/
5
6#ifndef lint
7#ifndef NOID
8static char	elsieid[] = "@(#)ialloc.c	8.30";
9#endif /* !defined NOID */
10#endif /* !defined lint */
11
12/*LINTLIBRARY*/
13
14#include "private.h"
15
16#define nonzero(n)	(((n) == 0) ? 1 : (n))
17
18char *
19imalloc(n)
20const int	n;
21{
22	return malloc((size_t) nonzero(n));
23}
24
25char *
26icalloc(nelem, elsize)
27int	nelem;
28int	elsize;
29{
30	if (nelem == 0 || elsize == 0)
31		nelem = elsize = 1;
32	return calloc((size_t) nelem, (size_t) elsize);
33}
34
35void *
36irealloc(pointer, size)
37void * const	pointer;
38const int	size;
39{
40	if (pointer == NULL)
41		return imalloc(size);
42	return realloc((void *) pointer, (size_t) nonzero(size));
43}
44
45char *
46icatalloc(old, new)
47char * const		old;
48const char * const	new;
49{
50	register char *	result;
51	register int	oldsize, newsize;
52
53	newsize = (new == NULL) ? 0 : strlen(new);
54	if (old == NULL)
55		oldsize = 0;
56	else if (newsize == 0)
57		return old;
58	else	oldsize = strlen(old);
59	if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
60		if (new != NULL)
61			(void) strcpy(result + oldsize, new);
62	return result;
63}
64
65char *
66icpyalloc(string)
67const char * const	string;
68{
69	return icatalloc((char *) NULL, string);
70}
71
72void
73ifree(p)
74char * const	p;
75{
76	if (p != NULL)
77		(void) free(p);
78}
79
80void
81icfree(p)
82char * const	p;
83{
84	if (p != NULL)
85		(void) free(p);
86}
87