fblist.c

c编译器实现

/*
 *  FBCC - A simple C compiler.
 * 
 *  Copyright (c) 1996 Fabrice Bellard
 *
 *  Contact addresses:
 *  mail: Fabrice Bellard, 451 chemin du mas de Matour, 34790 Grabels, France
 *  email: [e-mail]
 *  url: http://www.enst.fr/~bellard
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program; if not, write to the Free Software
 *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
 */
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "fbcc.h"


LIST *mk_int(int a,LIST *tl)
{
	 LIST *l;
	 l=malloc(sizeof(LIST));
	 l->type=LIST_INT;
	 l->data.val=a;
	 l->tl=tl;
	 return l;
}

LIST *mk_tag(int a,LIST *tl)
{
	 LIST *l;
	 l=malloc(sizeof(LIST));
	 l->type=LIST_TAG;
	 l->data.val=a;
	 l->tl=tl;
	 return l;
}

LIST *mk_list(LIST *list,LIST *tl)
{
	 LIST *l;
	 l=malloc(sizeof(LIST));
	 l->type=LIST_LIST;
	 l->data.list=list;
	 l->tl=tl;
	 return l;
}

LIST *mk_buf(char *buf,int buf_size,LIST *tl)
{
	 LIST *l;

	 l=malloc(sizeof(LIST)+buf_size-1);
	 l->type=LIST_STR;
	 l->data.buf_size=buf_size;
	 memcpy(l->str,buf,buf_size);
	 l->tl=tl;
	 return l;
}

LIST *mk_str(char *str,LIST *tl)
{
	 return mk_buf(str,strlen(str)+1,tl);
}

LIST *mk_sym(SYM *s,LIST *tl)
{
	 LIST *l;

	 l=malloc(sizeof(LIST));
	 l->type=LIST_SYM;
	 l->data.sym=s;
	 l->tl=tl;
	 return l;
}

int hd_tag(LIST *l)
{
	 if (l==NULL || l->type!=LIST_TAG) Error_Internal("'hd_tag': type incorrect");
	 return l->data.val;
}

int hd_int(LIST *l)
{
	 if (l==NULL || l->type!=LIST_INT) Error_Internal("'hd_int': type incorrect");
	 return l->data.val;
}

LIST *hd_list(LIST *l)
{
	 if (l==NULL || l->type!=LIST_LIST) Error_Internal("'hd_list': type incorrect");
	 return l->data.list;
}

char *hd_str(LIST *l)
{
	 if (l==NULL || l->type!=LIST_STR) Error_Internal("'hd_str': type incorrect");
	 return l->str;
}

SYM *hd_sym(LIST *l)
{
	 if (l==NULL || l->type!=LIST_SYM) Error_Internal("'hd_sym': type incorrect");
	 return l->data.sym;
}

void put_int(LIST *l,int a)
{
	 if (l->type!=LIST_INT) Error_Internal("'put_int': type incorrect");
	 l->data.val=a;
}

void put_tag(LIST *l,int a)
{
	 if (l->type!=LIST_TAG) Error_Internal("'put_tag': type incorrect");
	 l->data.val=a;
}

void put_list(LIST *l,LIST *a)
{
	 if (l->type!=LIST_LIST) Error_Internal("'put_tag': type incorrect");
	 l->data.list=a;
}



LIST *tl(LIST *l) 
{
	 if (l==NULL) Error_Internal("'tl' appel