ialloc.c

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/*
 * This file is in the public domain, so clarified as of
 * 2006-07-17 by Arthur David Olson.
 *
 * IDENTIFICATION
 *    src/timezone/ialloc.c
 */

#include "postgres_fe.h"

#include "private.h"


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

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

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

void *
irealloc(void *pointer, int size)
{
    if (pointer == NULL)
        return imalloc(size);
    return realloc((void *) pointer, (size_t) nonzero(size));
}

char *
icatalloc(char *old, const char *new)
{
    char       *result;
    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(const char *string)
{
    return icatalloc((char *) NULL, string);
}

void
ifree(char *p)
{
    if (p != NULL)
        (void) free(p);
}

void
icfree(char *p)
{
    if (p != NULL)
        (void) free(p);
}