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1 /*
2 ** This file is in the public domain, so clarified as of
3 ** 2006-07-17 by Arthur David Olson.
4 */
5 
6 /*LINTLIBRARY*/
7 
8 #include "private.h"
9 
10 char *
icatalloc(char * const old,const char * const new)11 icatalloc(char *const old, const char *const new)
12 {
13 	register char *	result;
14 	register int	oldsize, newsize;
15 
16 	newsize = (new == NULL) ? 0 : strlen(new);
17 	if (old == NULL)
18 		oldsize = 0;
19 	else if (newsize == 0)
20 		return old;
21 	else	oldsize = strlen(old);
22 	if ((result = realloc(old, oldsize + newsize + 1)) != NULL)
23 		if (new != NULL)
24 			(void) strcpy(result + oldsize, new);
25 	return result;
26 }
27 
28 char *
icpyalloc(const char * const string)29 icpyalloc(const char *const string)
30 {
31 	return icatalloc(NULL, string);
32 }
33