global.h

在linux下实行的简单的c语言编译器

/*File: Global.h
 *Global Types and Vars for BenC
 *It must be included in every files of this project;
 */

#ifndef _GLOBAL_H
#define _GLOBAL_H

#include <stdio.h>
#include <stdlib.h>
#include <ctype.h>
#include <string.h>

/*define the boolean FALSE*/
#ifndef FALSE
#define FALSE 0
#endif /*FALSE*/

/*define the boolean FALSE*/
#ifndef TRUE
#define TRUE 1
#endif /*TRUE*/

/*define the max file name number*/
#ifndef MAX_PATH
#define MAX_PATH 255
#endif /*MAX_PATH*/

/*define the max token length*/
#ifndef MAXTOKENLEN 
#define MAXTOKENLEN 40
#endif /*MAXTOKENLEN*/

/*Length of Label*/
#define LABEL_SIZE 10

#define EXP_VARIABLE_LENGTH 1
/*Max children number of a syntax tree node*/
#define MAXCHILDREN 3

typedef int TokenType;		/*used in lex*/

extern FILE *g_src_file;	/*source c code file*/
extern FILE *g_lst_file;	/*list file,list syntax tree*/
extern FILE *g_asm_file;	/*asm code file*/
extern FILE *g_data_file;	/*data section file*/
extern FILE *g_bss_file;	/*bss section file*/	

extern int g_lineno;		/*source line number*/

extern int g_error;		/*indicate error*/

/*****************************************************
		Syntax Tree
******************************************************/

/*Three kinds of syntax tree nodes*/
typedef enum {Dec, Stmt, Exp} NodeKind;
typedef enum {IfK, WhileK, CallK, ReturnK, ReturnK, BreakK, ContinueK, AssignK} StmtKind;
typedef enum {OpK, FNumK, NumK, EnumK, CharK, IdK, NotK} ExpKind;
typedef enum {FunDecK, FunDefK, VarK, CompK, ParamK} DecKind;

/*Type*/
typedef enum {Void, Int, Float, Bool, Char} Type;

/*size of symbol table*/
#define SIZE 15

/*record in variable table*/
typedef struct valEntry
{
	char *name;
	Type type;
	int offset;
	struct valEntry *next;
} ValEntry;

/*record in function table*/
typedef struct funEntry
{
	char *name;
	Type type;
	int ret_val;
	ValEntry *para;
	struct funEntry *next;
} FunEntry;

/*symbol table*/
typedef struct symtab
{
	struct symtab *parent;
	int level;
	int memloc;
	ValEntry *valTable[SIZE];
	FunEntry *funEntry;
	char lab1[LABEL_SIZE];
	char lab2[LABEL_SIZE];
} Symtab;

/*Syntax tree node*/
typedef struct treeNode
{
	struct treeNode *child[MAXCHILDREN];
	struct treeNode *sibling;
	int lineno;
	NodeKind nodeKind;
	union
	{
		ExpKind exp;
		DecKind dec;
		StmtKind stmt;
	} kind;
	
	union	
	{
		TokenType op;
		union
		{
			char c;
			int i;
			float f;
		} val;
		char *name;
		Symtab *table;
	} attr;
	int call_stmt;
	Type type;
} TreeNode;
#endif /*_GLOBAL_H*/