minix/commands/zoneinfo/ialloc.c

100 lines
1.5 KiB
C
Raw Normal View History

#
/*LINTLIBRARY*/
#include "stdio.h"
#ifndef lint
#ifndef NOID
static char sccsid[] = "@(#)ialloc.c 7.14";
#endif /* !NOID */
#endif /* !lint */
#ifndef alloc_t
#define alloc_t unsigned
#endif /* !alloc_t */
#ifdef MAL
#define NULLMAL(x) ((x) == NULL || (x) == MAL)
#else /* !MAL */
#define NULLMAL(x) ((x) == NULL)
#endif /* !MAL */
extern char * calloc();
extern char * malloc();
extern char * realloc();
extern char * strcpy();
char *
imalloc(n)
{
#ifdef MAL
register char * result;
if (n == 0)
n = 1;
result = malloc((alloc_t) n);
return (result == MAL) ? NULL : result;
#else /* !MAL */
if (n == 0)
n = 1;
return malloc((alloc_t) n);
#endif /* !MAL */
}
char *
icalloc(nelem, elsize)
{
if (nelem == 0 || elsize == 0)
nelem = elsize = 1;
return calloc((alloc_t) nelem, (alloc_t) elsize);
}
char *
irealloc(pointer, size)
char * pointer;
{
if (NULLMAL(pointer))
return imalloc(size);
if (size == 0)
size = 1;
return realloc(pointer, (alloc_t) size);
}
char *
icatalloc(old, new)
char * old;
char * new;
{
register char * result;
register oldsize, newsize;
oldsize = NULLMAL(old) ? 0 : strlen(old);
newsize = NULLMAL(new) ? 0 : strlen(new);
if ((result = irealloc(old, oldsize + newsize + 1)) != NULL)
if (!NULLMAL(new))
(void) strcpy(result + oldsize, new);
return result;
}
char *
icpyalloc(string)
char * string;
{
return icatalloc((char *) NULL, string);
}
ifree(p)
char * p;
{
if (!NULLMAL(p))
free(p);
}
icfree(p)
char * p;
{
if (!NULLMAL(p))
free(p);
}