include.h

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#ifndef INCLUDE
#define INCLUDE

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

//错误编码
#define PROEXP 0
#define IDERR  1
#define SEMAERR 2
#define EOFERR 3
#define BEGINERR 4
#define ENDERR 5
#define PROCEEXP 6
#define VREDEFINE 7
#define PREDEFINE 8

#define SUCCESS 29
#define   input     "in.pas"
#define   output   "out.txt"
#define   N        30      //二元表最大长度
#define   KEYSNUM  37        //关键字数

#define ERR
#define WLEN 11 //字长
#define MAXPAR 10 //过程参数个数
#define VLEN 30 //变量表长
#define PLEN 20 //过程表长
#define NLEN 10 //名长

#define PROGRAM   0
#define VAR 1
#define PROCEDURE 2
#define PROCEEDURE 100
#define PROGRAMA   100
#define BEGIN      3
#define END      4
#define IF      5
#define THEN      6
#define ELSE      7
#define WHILE      8
#define DO 9
#define FOR 10
#define STEP 11
#define UNTIL 12
#define CALL 13
#define READ 14
#define WRITE 15
#define IDENT 16
#define CONST 17
#define DOU 31
#define SEMA      32
#define DOT      33

/***********************************************************************************
*						        符号编码表                                         *
***********************************************************************************/
  #define   KEYWORD         1     //保留字,共有16种如program等
  #define   ID              2     //标志符  ，用户自定义的变量和过程
  //#define   CONST           3     //常数整型
  #define   OPER            4     //运算符
  #define   INTER           5     //界符

/***********************************************************************************
*													    关键字表                                                   *
***********************************************************************************/
char   *keys[KEYSNUM]   =   {           "program",              //0
								        "var",					//1
							 	        "procedure",            //2
										"begin",				//3
										"end",					//4
										 "if",					//5
										"then",					//6
										"else",					//7
										"while",				//8
									    "do",					//9
										"for",					//10
										"step",					//11
									    "until",			    //12
										"call",					//13
									   "read",					//14
										"write" ,				//15
										"ident",				//16
										"const",				//17
										 "+",					//18
										 "-",					//19
										 "*",					//20
										 "/",					//21
										":=",					//22
										"=",					//23
									    "<>",					//24
										">",					//25
										">=",					//26
										"<",  					//27
										"<=",					//28
										"(",					//29
										")",					//30
										",",                    //31逗号
										";",					//32分号
										".",					//33句号

										"\n",					//34回车
										"programa",              //0
										  "proceedure",            //1
            };
/***********************************************************************************
 *								 全局变量                                                   *
 ***********************************************************************************/
char   ch;              //从文件中读出字符
int    p=0;             //定位标志
//int    table[N];     //二元组序列
struct
{	char name[NLEN];
	int no;
}table[100];


int lines=0;//指示当前的行，用于递归下降分析时作为出错信息
int PC=0;//用于四元式地址的指示

/***********************************************************************************
 *						    字母判断IsLetter()                                    *
 ***********************************************************************************/
  int   IsLetter(char   c)
  {
          if   (   (c>='a'   &&   c<='z')   ||   (c>='A'   &&   c<='Z')   )
                  return   1;
          else
                  return   0;
  }

   /***********************************************************************************
   *						   数字判断IsLetter()                                    *
   ***********************************************************************************/
  int   IsDigit(char   c)
  {
          if   (c>='0'   &&   c<='9')
                  return   1;
          else
                  return   0;
  }

/***********************************************************************************
 *						            错误处理error()                                *
 ***********************************************************************************/
void error(int errno)
{
	switch(errno)
	{
		case PROEXP:
			printf("行号：%d  错误：应该为program!\n",lines);
			break;
		case IDERR:
			printf("行号：%d  错误：标识符不正确!\n",lines);
			break;
		case SEMAERR:
			printf("行号：%d  错误：应该有';'!\n",lines);
			break;
		case EOFERR:
			printf("行号：%d  错误：文件不合法，有异常结束！\n",lines);
			break;
		case BEGINERR:
			printf("行号：%d  错误：缺少begin！\n",lines);break;
		case ENDERR:
			printf("行号：%d  错误：缺少end！\n",lines);break;
		case PROCEEXP:
			printf("行号：%d  错误：缺少procedure！\n",lines);break;
		case VREDEFINE:
			printf("行号：%d  错误：该变量已经被定义过了！\n",lines);break;
		case PREDEFINE:
			printf("行号：%d  错误：该过程已经被定义过了！\n",lines);break;
		case SUCCESS:
			printf("编译成功\n",lines);return;
	}
	exit(1);
}

//所有函数声明
int   Search(char   *buf);
void   Scan(FILE   *fp);

int GetWord();
void PROG();
void enterp(char name[NLEN],int a,int b,int c,int addr);
void enterv(char *name,int no);
void IDP();
void PL();
void PRP();
void PP();

int GetGL(int state,int no);
int newtp();
void gen(char op[],int x,int y,int k);
void PASER();
int action(int state,int no);
int findv(char *c);


#endif