2 ** This file is in the public domain, so clarified as of
3 ** 2006-07-17 by Arthur David Olson.
10 #define nonzero(n) (((n) == 0) ? 1 : (n))
16 return malloc((size_t) nonzero(n));
20 icalloc(nelem, elsize)
24 if (nelem == 0 || elsize == 0)
26 return calloc((size_t) nelem, (size_t) elsize);
30 irealloc(pointer, size)
36 return realloc((void *) pointer, (size_t) nonzero(size));
42 const char * const new;
44 register char * result;
45 register int oldsize, newsize;
47 newsize = (new == NULL) ? 0 : strlen(new);
50 else if (newsize == 0)
52 else oldsize = strlen(old);
53 if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
55 (void) strcpy(result + oldsize, new);
61 const char * const string;
63 return icatalloc((char *) NULL, string);