michael@0: /*
michael@0: ** This file is in the public domain, so clarified as of
michael@0: ** 2006-07-17 by Arthur David Olson.
michael@0: */
michael@0: 
michael@0: #ifndef lint
michael@0: #ifndef NOID
michael@0: static char	elsieid[] = "@(#)ialloc.c	8.30";
michael@0: #endif /* !defined NOID */
michael@0: #endif /* !defined lint */
michael@0: 
michael@0: /*LINTLIBRARY*/
michael@0: 
michael@0: #include "private.h"
michael@0: 
michael@0: #define nonzero(n)	(((n) == 0) ? 1 : (n))
michael@0: 
michael@0: char *
michael@0: imalloc(n)
michael@0: const int	n;
michael@0: {
michael@0: 	return malloc((size_t) nonzero(n));
michael@0: }
michael@0: 
michael@0: char *
michael@0: icalloc(nelem, elsize)
michael@0: int	nelem;
michael@0: int	elsize;
michael@0: {
michael@0: 	if (nelem == 0 || elsize == 0)
michael@0: 		nelem = elsize = 1;
michael@0: 	return calloc((size_t) nelem, (size_t) elsize);
michael@0: }
michael@0: 
michael@0: void *
michael@0: irealloc(pointer, size)
michael@0: void * const	pointer;
michael@0: const int	size;
michael@0: {
michael@0: 	if (pointer == NULL)
michael@0: 		return imalloc(size);
michael@0: 	return realloc((void *) pointer, (size_t) nonzero(size));
michael@0: }
michael@0: 
michael@0: char *
michael@0: icatalloc(old, new)
michael@0: char * const		old;
michael@0: const char * const	new;
michael@0: {
michael@0: 	register char *	result;
michael@0: 	register int	oldsize, newsize;
michael@0: 
michael@0: 	newsize = (new == NULL) ? 0 : strlen(new);
michael@0: 	if (old == NULL)
michael@0: 		oldsize = 0;
michael@0: 	else if (newsize == 0)
michael@0: 		return old;
michael@0: 	else	oldsize = strlen(old);
michael@0: 	if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
michael@0: 		if (new != NULL)
michael@0: 			(void) strcpy(result + oldsize, new);
michael@0: 	return result;
michael@0: }
michael@0: 
michael@0: char *
michael@0: icpyalloc(string)
michael@0: const char * const	string;
michael@0: {
michael@0: 	return icatalloc((char *) NULL, string);
michael@0: }
michael@0: 
michael@0: void
michael@0: ifree(p)
michael@0: char * const	p;
michael@0: {
michael@0: 	if (p != NULL)
michael@0: 		(void) free(p);
michael@0: }
michael@0: 
michael@0: void
michael@0: icfree(p)
michael@0: char * const	p;
michael@0: {
michael@0: 	if (p != NULL)
michael@0: 		(void) free(p);
michael@0: }