globals.h

编译原理课设

//声明全局变量和类型

#ifndef _GLOBALS_H_
#define _GLOBALS_H_

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

#ifndef FALSE
#define FALSE 0
#endif

#ifndef TRUE
#define TRUE 1
#endif

#define sizeofint 2
#define sizeofchar 2
#define sizeoffloat sizeof(float)

#define MAXRESERVED 10	//保留字个数
#define VARIABLE_LENGTH 2
#define EXP_VARIABLE_LENGTH 1
#define LABEL_SIZE 10

typedef int TokenType;

extern FILE* source; /* 源代码文件 */
extern FILE* listing; /* 编译列表文件 */
extern FILE* inter_code; /* 汇编码文件 */

extern int lineno; /* 源文件行数记录 */

/* 语法树 */
typedef enum {Dec,Stmt,Exp} NodeKind;
typedef enum {IfK,WhileK,CallK,ReturnK,BreakK,ContinueK,AssignK} StmtKind;
typedef enum {OpK,NumK,FnumK,CharK,IdK,NotK} ExpKind;
typedef enum {FunDecK,FunDefK,VarK,CompK,ParamK} DecKind;

/* 声明可以用的类型 */
typedef enum {Void,Integer,Float,Boolean,Char} Type;

/* 符号表大小 */
#define SIZE 13

/* 记录变量 */
typedef struct valEntry {
	char * name;
	Type type;
	int offset;		//启用记录
	struct valEntry * next;
} ValEntry;

/* 记录函数 */
typedef struct funEntry {
	char * name;
	Type type;
	int ret_val;	//返回值
	ValEntry * para;	//函数的参数
	struct funEntry * next;
} FunEntry;

/* 符号表结构体 */
typedef struct symtab {
	struct symtab * parent;
	int nestlevel;
	int memloc;		//符号表中给变量的内存地址
	ValEntry * valTable[SIZE];
	FunEntry * funEntry;
	char lab1[LABEL_SIZE];
	char lab2[LABEL_SIZE];
} Symtab;


#define MAXCHILDREN 3

typedef struct treeNode
   { struct treeNode * child[MAXCHILDREN];
     struct treeNode * sibling;
     int lineno;
     NodeKind nodekind;
	 union { StmtKind stmt; ExpKind exp; DecKind dec;} kind;
     union { TokenType op;
             union
				{int i;
				 float f;
				} val;
             char * name; 
			 Symtab * table;
           } attr;
	 int call_stmt;
     Type type; 
   } TreeNode;

/* TraceScan = TRUE 将会把变量写到列表文件*/
extern int TraceScan;

/* TraceParse = TRUE 将会把语法树写到列表文件*/
extern int TraceParse;

/* TraceAnalyze = TRUE 将会把符号表的插入查找写到列表文件 */
extern int TraceAnalyze;

/* Error = TRUE 防止重复出错 */
extern int Error; 
#endif