buildroot

/*

 * Copyright (C) 2002 Roman Zippel <zippel@linux-m68k.org>

 * Released under the terms of the GNU GPL v2.0.

 */

​

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

​

#include "lkc.h"

​

#define DEBUG_EXPR  0

​

struct expr *expr_alloc_symbol(struct symbol *sym)

{

    struct expr *e = xcalloc(1, sizeof(*e));

    e->type = E_SYMBOL;

    e->left.sym = sym;

    return e;

}

​

struct expr *expr_alloc_one(enum expr_type type, struct expr *ce)

{

    struct expr *e = xcalloc(1, sizeof(*e));

    e->type = type;

    e->left.expr = ce;

    return e;

}

​

struct expr *expr_alloc_two(enum expr_type type, struct expr *e1, struct expr *e2)

{

    struct expr *e = xcalloc(1, sizeof(*e));

    e->type = type;

    e->left.expr = e1;

    e->right.expr = e2;

    return e;

}

​

struct expr *expr_alloc_comp(enum expr_type type, struct symbol *s1, struct symbol *s2)

{

    struct expr *e = xcalloc(1, sizeof(*e));

    e->type = type;

    e->left.sym = s1;

    e->right.sym = s2;

    return e;

}

​

struct expr *expr_alloc_and(struct expr *e1, struct expr *e2)

{

    if (!e1)

        return e2;

    return e2 ? expr_alloc_two(E_AND, e1, e2) : e1;

}

​

struct expr *expr_alloc_or(struct expr *e1, struct expr *e2)

{

    if (!e1)

        return e2;

    return e2 ? expr_alloc_two(E_OR, e1, e2) : e1;

}

​

struct expr *expr_copy(const struct expr *org)

{