BSD 4_4 release

[unix-history] / usr / src / share / zoneinfo / ialloc.c

/*-
* Copyright (c) 1991, 1993
*      The Regents of the University of California.  All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Arthur David Olson of the National Cancer Institute.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
*    notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
*    notice, this list of conditions and the following disclaimer in the
*    documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
*    must display the following acknowledgement:
*      This product includes software developed by the University of
*      California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
*    may be used to endorse or promote products derived from this software
*    without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/

#ifndef lint
static char sccsid[] = "@(#)ialloc.c    8.1 (Berkeley) 6/8/93";
#endif /* not lint */

#ifdef notdef
static char     elsieid[] = "@(#)ialloc.c       8.18";
#endif

/*LINTLIBRARY*/

#include <string.h>
#include <stdlib.h>

#ifdef MAL
#define NULLMAL(x)      ((x) == NULL || (x) == MAL)
#else /* !defined MAL */
#define NULLMAL(x)      ((x) == NULL)
#endif /* !defined MAL */

#define nonzero(n)      (((n) == 0) ? 1 : (n))

char *  icalloc __P((int nelem, int elsize));
char *  icatalloc __P((char * old, const char * new));
char *  icpyalloc __P((const char * string));
char *  imalloc __P((int n));
char *  irealloc __P((char * pointer, int size));
void    ifree __P((char * pointer));

char *
imalloc(n)
const int       n;
{
#ifdef MAL
       register char * result;

       result = malloc((size_t) nonzero(n));
       return NULLMAL(result) ? NULL : result;
#else /* !defined MAL */
       return malloc((size_t) nonzero(n));
#endif /* !defined MAL */
}

char *
icalloc(nelem, elsize)
int     nelem;
int     elsize;
{
       if (nelem == 0 || elsize == 0)
               nelem = elsize = 1;
       return calloc((size_t) nelem, (size_t) elsize);
}

char *
irealloc(pointer, size)
char * const    pointer;
const int       size;
{
       if (NULLMAL(pointer))
               return imalloc(size);
       return realloc((void *) pointer, (size_t) nonzero(size));
}

char *
icatalloc(old, new)
char * const            old;
const char * const      new;
{
       register char * result;
       register        oldsize, newsize;

       newsize = NULLMAL(new) ? 0 : strlen(new);
       if (NULLMAL(old))
               oldsize = 0;
       else if (newsize == 0)
               return old;
       else    oldsize = strlen(old);
       if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
               if (!NULLMAL(new))
                       (void) strcpy(result + oldsize, new);
       return result;
}

char *
icpyalloc(string)
const char * const      string;
{
       return icatalloc((char *) NULL, string);
}

void
ifree(p)
char * const    p;
{
       if (!NULLMAL(p))
               (void) free(p);
}

void
icfree(p)
char * const    p;
{
       if (!NULLMAL(p))
               (void) free(p);
}