xref: /illumos-gate/usr/src/cmd/zic/ialloc.c (revision 7c478bd9)
1 #pragma ident	"%Z%%M%	%I%	%E% SMI"
2 
3 /* static char	elsieid[] = "@(#)ialloc.c	8.29"; */
4 
5 /*LINTLIBRARY*/
6 
7 #include "private.h"
8 
9 #define	nonzero(n)	(((n) == 0) ? 1 : (n))
10 
11 char *
imalloc(n)12 imalloc(n)
13 const int	n;
14 {
15 	return (malloc((size_t) nonzero(n)));
16 }
17 
18 void *
irealloc(pointer,size)19 irealloc(pointer, size)
20 void * const	pointer;
21 const int	size;
22 {
23 	if (pointer == NULL)
24 		return (imalloc(size));
25 	return (realloc((void *) pointer, (size_t) nonzero(size)));
26 }
27 
28 char *
icatalloc(old,new)29 icatalloc(old, new)
30 char * const		old;
31 const char * const	new;
32 {
33 	register char *	result;
34 	register int	oldsize, newsize;
35 
36 	newsize = (new == NULL) ? 0 : strlen(new);
37 	if (old == NULL)
38 		oldsize = 0;
39 	else if (newsize == 0)
40 		return (old);
41 	else	oldsize = strlen(old);
42 	if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
43 		if (new != NULL)
44 			(void) strcpy(result + oldsize, new);
45 	return (result);
46 }
47 
48 char *
icpyalloc(string)49 icpyalloc(string)
50 const char * const	string;
51 {
52 	return (icatalloc((char *) NULL, string));
53 }
54 
55 void
ifree(p)56 ifree(p)
57 char * const	p;
58 {
59 	if (p != NULL)
60 		(void) free(p);
61 }
62