main.cpp

#include "global.h"        //结构和枚举声明
#include "support.h"       //辅助函数
#include "lex.h"           //词法分析函数
#include "sematic.h"
#include "syntax.h"
#include "IR.h"
#include "asm.h"
#pragma warning(disable:4996)

/*
	全局变量声明
*/
std::map<std::string, int> keywordTable;							//保留字表
std::vector<std::string> errorMsg;									//错误记录		

unsigned int errorCount = 0;			//错误总数
unsigned int numMax = 10;				//允许的数字最大长度
int lineNo = 1;							//当前行号
char ch = 0;							//从文件读入的一个字符
int symbol = 0;							//一个token的属性
long long value = 0;					//一个token的值:如果token是NUM,则val是其值;如果token是IDENT,则val是其在符号表中的位置
std::string ident;						//存储当前字符串
unsigned int level;						//记录当前层数 

/*
	初始函数声明
*/
void init();								//初始化过程

/*
	合并文件
*/
void mergeFile(char *file1, char *file2, char *file3)
{
	freopen(file1, "w", stdout);
	char c = 0;

	//头文件部分
	printf(".386\n");
	printf(".model flat, stdcall\n");
	printf("option casemap : none\n");
	printf("\ninclude \\masm32\\include\\masm32.inc\n");
	printf("include \\masm32\\include\\kernel32.inc\n");
	printf("include \\masm32\\macros\\macros.asm\n");
	printf("include \\masm32\\include\\msvcrt.inc\n");
	printf("\nincludelib \\masm32\\lib\\msvcrt.lib\n");
	printf("includelib \\masm32\\lib\\masm32.lib\n");
	printf("includelib \\masm32\\lib\\kernel32.lib\n");

	//数据段
	printf("\n.data\n");
	printf("_char db '%%c',10,0\n");
	printf("_int db '%%d',10,0\n");
	printf("_char_in db '%%c',0\n");
	printf("_int_in db '%%d',0\n");
	freopen(file2, "r", stdin);
	while ((c = getchar()) != EOF)
	{
		putchar(c);
	}
	//代码段
	printf("\n\n.code\n");
	freopen(file3, "r", stdin);
	while ((c = getchar()) != EOF)
	{
		putchar(c);
	}
	printf("end start\n");
	fclose(stdin);
	fclose(stdout);

	return;
}

int main()
{
	AST root = makeNode(ROOT,NULL);
	*(root->val.ident) = "main";
//	printf("Please Enter the filepath:\n");
//	char s[100];
//	scanf("%s", s);
//	freopen(s, "r", stdin);
	freopen("in_IR.txt", "r", stdin);
	freopen("out.txt", "w", stdout);

	//初始化
	init();
	//语法分析程序
	syntax(root);
	//错误报告
	freopen("CON", "w", stdout);
	if (errorCount != 0)
	{
		printf("%d error found!\n", errorCount);
		errorRep();
		return 0;
	}
	printf("Syntax Analysis Complete!\n\n");
//	printAST(root, 0);

	freopen("Table.csv", "w", stdout);
	//语义分析程序
	sematic(root);
	//错误报告
	freopen("CON", "w", stdout);
	if (errorCount != 0)
	{
		printf("%d error found\n", errorCount);
		errorRep();
		return 0;
	}
	printf("Sematic Analysis Completed!\n\n");

	//生成四元式
	freopen("IR.txt", "w", stdout);
	IREmit(root->children->at(0));
	fclose(stdout);
	freopen("CON", "w", stdout);
	printf("IR generated!\n\n");

	//生成汇编
	freopen("IR.txt", "r", stdin);
	freopen("asm.txt", "w", stdout);
	asmMaker(root,NULL,1);
	fclose(stdin);
	fclose(stdout);
	freopen("CON", "w", stdout);
	printf("Asm generated!\n\n");

	fclose(stdin);
	fclose(stdout);
	//合并文件
	mergeFile("Final.txt", "data.txt", "asm.txt");

	return 0;
}

//初始化过程:添加保留字
void init()
{
	//保留字集
	keywordTable.insert(std::pair<std::string, int>("begin",BEGIN));
	keywordTable.insert(std::pair<std::string, int>("end", END));
	keywordTable.insert(std::pair<std::string, int>("for", FOR));
	keywordTable.insert(std::pair<std::string, int>("while", WHILE));
	keywordTable.insert(std::pair<std::string, int>("procedure", PRO));
	keywordTable.insert(std::pair<std::string, int>("function", FUN));
	keywordTable.insert(std::pair<std::string, int>("do", DO));
	keywordTable.insert(std::pair<std::string, int>("to", TO));
	keywordTable.insert(std::pair<std::string, int>("downto", DOWNTO));
	keywordTable.insert(std::pair<std::string, int>("var", VAR));
	keywordTable.insert(std::pair<std::string, int>("else", ELSE));
	keywordTable.insert(std::pair<std::string, int>("integer", INT));
	keywordTable.insert(std::pair<std::string, int>("char", CHAR));
	keywordTable.insert(std::pair<std::string, int>("array", ARRAY));
	keywordTable.insert(std::pair<std::string, int>("const", CONST));
	keywordTable.insert(std::pair<std::string, int>("if", IF));
	keywordTable.insert(std::pair<std::string, int>("then", THEN));
	keywordTable.insert(std::pair<std::string, int>("read", READ));
	keywordTable.insert(std::pair<std::string, int>("write", WRITE));
	keywordTable.insert(std::pair<std::string, int>("of", OF));

	//符号集
	keywordTable.insert(std::pair<std::string, int>("+", PLUS));
	keywordTable.insert(std::pair<std::string, int>("-", MINUS));
	keywordTable.insert(std::pair<std::string, int>("*", TIMES));
	keywordTable.insert(std::pair<std::string, int>("/", SLASH));
	keywordTable.insert(std::pair<std::string, int>(",", COMMA));
	keywordTable.insert(std::pair<std::string, int>(";", SEMICOLON));
	keywordTable.insert(std::pair<std::string, int>("(", LPARENT));
	keywordTable.insert(std::pair<std::string, int>(")", RPARENT));
	keywordTable.insert(std::pair<std::string, int>("=", EQL));
	keywordTable.insert(std::pair<std::string, int>(".", PERIOD));
	keywordTable.insert(std::pair<std::string, int>("<", LESS));
	keywordTable.insert(std::pair<std::string, int>(">", GREATER));
	keywordTable.insert(std::pair<std::string, int>(":", COLON));
	keywordTable.insert(std::pair<std::string, int>("'", SGLQUT));
	keywordTable.insert(std::pair<std::string, int>("\"", QUT));
	keywordTable.insert(std::pair<std::string, int>("[", LBRACKET));
	keywordTable.insert(std::pair<std::string, int>("]", RBRACKET));

	//变量初始化
	ch = getchar();
	symbol = lex();

}