action.cpp

一门课程的proj

#include "StdAfx.h"
#include ".\action.h"

action::action(void)
{
}

action::~action(void)
{
}

string action::itos(int i)
{
	stringstream   s;   
	s   <<   i;   
	return   s.str();   
}
void action::take_action(int creation_num)
{
	cout<<"take action after creation_num : "<<creation_num<<endl;
	switch(creation_num)
	{
	case 0://S0 → PROGRAM $ID ; S1 BEGIN S2 END.
		{
			return;
		}
	case 1://S1 → S18 S3
		/* 定义部分结束,语句部分开始 */
		{
			_global.clear();
			_global.sentence_num = 100;
			_global.temp_num = 0;
			return;
		}
	case 2://S18 → e
		/* 地址初始化 */
		{
			_global.offset = 0;
			return;
		}
	case 3://S3 → S3 S3
		{
			return;
		}
	case 4://S3 → e
		{
			return;
		}
	case 5://S3 → S6 : S9 ;
		/* 结束一个变量定义，去除变量类型 */
		{
			attribute temp;
			_global.popTop(temp);//移出type属性
			return;
		}
	case 6://S3 → CONST S6 : S9 ;
		{
			return;
		}
	case 7://S6 → INTEGER
		/* 定义整数变量类型 */
		{
			_global.push("type", "", integer, 0);
			return;
		}
	case 8 ://S6 → REAL
		/* 定义实数变量类型 */
		{
			_global.push("type", "", real, 0);
			return;
		}
	case 9://S6 → BOOLEAN
		/* 定义布尔变量类型 */
		{
			_global.push("type", "", boolean, 0);
			return;
		}
	case 10://S8 → TRUE
		{
			return;
		}
	case 11://S8 → FALSE
		{
			return;
		}
	case 12://S9 → S4 , S9
		{
			return;
		}
	case 13://S9 → S4
		{
			return;
		}
	case 14://S4 → ARRAY $ID [ S10 ]
		{
			return;
		}
	case 15://S4 → $ID
		/* 定义一个变量 */
		{
			virable_item *tempVirable = new virable_item();
			attribute v, type;
			_global.popTop(v);
			_global.getTop(type);
			if( v.att_name.compare("newID") == 0 )
			{
				tempVirable->name = v.content;
				tempVirable->type = type.att_value;
				if( tempVirable->type == real)
				{
					_global.offset += 8;
					tempVirable->address = _global.offset;
				}
				else
				{
					_global.offset += 4;
					tempVirable->address = _global.offset;
				}
				_global.v_table.push_back(*tempVirable);
			}
			return;
		}
	case 16://S10 → $INT
		{
			return;
		}
	case 17://S10 → $INT , S10
		{
			return;
		}
	case 18://S3 → FUNCTION $ID ( S5 ) : S17 ;
		{
			return;
		}
	case 19://S5 → S6 $ID , S5
		{
			return;
		}
	case 20://S5 → e
		{
			return;
		}
	case 21://S2 → S11 S2
		{
			return;
		}
	case 22://S2 → e
		{
			return;
		}
	case 23://S11 → S4 := S12 ;
		{
			return;
		}
	case 24://S12 → S13 < S13
		/*  */
		{
			attribute op1, op2;
			_global.popTop(op1);//第一个S13
			_global.popTop(op2);//第二个S13
			int type = op1.att_value;//类型检查
			_code.addCode(_global.sentence_num, itos(0), "-", op1.content, op2.content);//合为一个S12
			_global.push("opt","temp"+itos(_global.temp_num), type, 0);//S12进栈
			_global.temp_num++;
			_global.push("true", "", _global.sentence_num, 0);//判断地址进栈
			_global.sentence_num++;
			return;
		}
	case 25://S12 → S13 <= S13
		{
			return;
		}
	case 26://S12 → S13 > S13
		{
			return;
		}
	case 27://S12 → S13 >= S13
		{
			return;
		}
	case 28://S12 → S13 = S13
		{
			return;
		}
	case 29://S12 → S13 <> S13
		{
			return;
		}
	case 30://S12 → S13
		{
			return;
		}
	case 31://S13 → S14 OR S14
		{
			return;
		}
	case 32://S13 → S14 AND S14
		{
			return;
		}
	case 33://S13 → S14
		{
			return;
		}
	case 34://S14 → S15 + S15
		{
			return;
		}
	case 35://S14 → S15 - S15
		{
			return;
		}
	case 36://S14 → S15
		{
			return;
		}
	case 37://S15 → S16 * S16	
		{
			return;
		}
	case 38://S15 → S16 / S16
		{
			return;
		}
	case 39://S15 → S16
		{
			return;
		}
	case 40://S16 → NOT S17
		{
			return;
		}
	case 41://S16 → S17
		{
			return;
		}
	case 42://S16 → ( S12 )
		{
			return;
		}
	case 43://S17 → $ID
		/* 引用一个变量 */
		{

			return;
		}
	case 44://S17 → $INT
		{
			return;
		}
	case 45://S17 → $REAL
		{
			return;
		}
	case 46://S11 → IF S12 THEN S11
		{
			attribute dst;
			_global.popTop(dst);//S11语句的位置
			attribute skip;
			_global.popTop(skip);//S12语句的位置
			attribute checkID;
			_global.popTop(checkID);//S12的id
			_code.addCode(skip.att_value, itos(dst.att_value), "jnz", checkID.content, "-");
			_code.addCode(skip.att_value+1, itos(_global.sentence_num), "j", "-", "-");
			return;
		}
	case 47://S11 → IF S12 THEN S11 ELSE S11
		{
			return;
		}
	case 48://S11 → WHILE S12 DO S11
		{
			return;
		}
	case 49://S11 → REPEAT S2 UNTIL S12 ;
		{
			return;
		}
	case 50://S11 → FOR $ID := S12 TO S12 DO S11
		{
			return;
		}
	case 51://S11 → BEGIN S2 END	
		{
			return;
		}
	case 52://S11 → S7 FUNCTION $ID ( S5 ) ;
		{
			return;
		}
	case 53://S7 → S4 :=
		{
			return;
		}
	case 54://S7 → e
		{
			return;
		}
	case 55://S5 → S12 , S5
		{
			return;
		}
	case 56://S5 → e
		{
			return;
		}
	case 57://S20 → e
		/* 消去函数名变量 */
		{
			_global.clear();
			return ;
		}
	default:return;
	}
}