cmd/zic/ialloc.c

#pragma ident   "%Z%%M% %I% %E% SMI"

/* static char  elsieid[] = "@(#)ialloc.c   8.29"; */

/*LINTLIBRARY*/

#include "private.h"

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

char *
imalloc(n)
const int   n;
{
    return (malloc((size_t) nonzero(n)));
}

void *
irealloc(pointer, size)
void * const    pointer;
const int   size;
{
    if (pointer == NULL)
        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 int    oldsize, newsize;

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