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parser.cpp
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parser.cpp
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#include "parser.hpp"
#include <string>
//*******************************************Initial part***********************************************
parser::parser(root_Node* root){
this->root = root;
parserInit();
}
parser::~parser(){
printCode();
}
void parser::parserInit(){
block wholeBlock;
stack.push_back(wholeBlock);
parse(root);
}
//******************************************************************************************************
//************************************最高级部分的PARSE********************************************************
//*******************************************Parse**************************************************
void parser::parse(root_Node* rNode){
if(rNode == NULL)
return;
root_kind cur_kind = rNode->type;
switch (cur_kind) {
case Func_T:
parseFunc(rNode->son.func_tree);
break;
case Decl_T:
parseDecl(rNode->son.decl_tree);
break;
default:
cout << "Not the expected Function or Declaration type" <<endl;
return;
}
parse(rNode->next);
}
//******************************************************************************************************
//**************************************二级单元PARSE******************************************************
//*******************************parse function& function decl********************************************
void parser::parseFunc(func_Node* fNode){
type_specifier_kind cur_type = fNode->type;
declarator_Node *func_declarator = fNode->func_name;
param_Node *param_list = func_declarator->info.decl_info.detail.func_info.list.param_list;
if(fNode->decl_list != NULL){
error(fNode->beg_line, "一个未知语法发生了!");
}
if(func_declarator->next != NULL){
error(fNode->beg_line, "Function should have just one name!");
}
else if(func_declarator->info.decl_info.type2 != FUNC){
error(fNode->beg_line, "Check the function definition!");
}
else if(func_declarator->info.decl_info.detail.func_info.func_type != PARAM && func_declarator->info.decl_info.detail.func_info.func_type != func_NA ){
error(fNode->beg_line,"C requires a type specifier for all declarations!");
}
else{
FuncNode declfunc;
string func_name = getIDname(func_declarator->info.decl_info.detail.func_info.decl_tree);
bool isdeclared = false;
if(funcPool.find(func_name) != funcPool.end()){
//如果不存在这个函数,也就是没有声明过
if(funcPool[func_name].isdefinied){
error(fNode->beg_line,"Function " + func_name + "is duplicated!");
}
else{
isdeclared = true;
//准备更新funcpool中的节点
declfunc = funcPool[func_name];
funcPool.erase(funcPool.find(func_name));
}
}
block funcBlock;
funcBlock.isfunc = true;
funcBlock.func.name = func_name;
funcBlock.func.rettype = cur_type;
funcBlock.func.isdefinied = true;
stack.push_back(funcBlock);
funcPool.insert({func_name,funcBlock.func});
innerCodeGenerator.addCode("FUNCTION "+ func_name + " :");
parseParam(param_list,func_name,true);
FuncNode newfunc = funcPool[func_name];
if(isdeclared){
if(declfunc.rettype != newfunc.rettype){
error(fNode->beg_line, "The function declared return type has a conflict with the definition!");
}
if(declfunc.paralist.size() != newfunc.paralist.size() ){
error(fNode->beg_line,"The parameter number is conflict with declared!");
}
for(vector<VarNode>::iterator iter1 = declfunc.paralist.begin(),iter2 = newfunc.paralist.begin() ; iter1 != declfunc.paralist.end()&&iter2 != newfunc.paralist.end();
iter1++,iter2++){
if(iter1->type != iter2->type){
error(iter1->line,"The declared function parameter " + iter2->name + "'s type doesn't match the definition!");
}
}
}
funcBlock.func = newfunc;
parseCompoundStat(fNode->stat_list);
stack.pop_back();
}
}
void parser::parseDecl(declaration_Node* dNode){
type_specifier_kind cur_type = dNode->type;
if(cur_type == t_VOID)
error(dNode->line,"Variable has incomplete type 'void'");
if(dNode->decl_list == NULL)
return;
parseInitDeclList(dNode->decl_list, cur_type);
}
//**************************************三级单元的PARSE**************************************************
//*****************************parse parameter & stat & decl & exp********************************************
//函数的定义需要获得形参数,声明不需要
void parser::parseParam(param_Node* decl_Node, string func_name, bool Isdefinition){
if(decl_Node == NULL)
return;
type_specifier_kind cur_type = decl_Node->type;
if(cur_type == t_VOID){
error(decl_Node->declarator->line, "Can't definite parameter as VOID!");
}
//暂时只考虑变量,不考虑数组
declarator_Node *cur_declarator = decl_Node->declarator;
if(cur_declarator->info.decl_info.type2 != Identifier){
error(cur_declarator->line,"Currently only Identifier can be handled!");
}
ID_Node* cur_ID = cur_declarator->info.decl_info.detail.ID_info.ID_list;
string varName = cur_ID->name;
VarNode newVar;
newVar.name = varName;
newVar.line = cur_ID->line;
newVar.type = cur_type;
if(Isdefinition){
newVar.num = innerCodeGenerator.varNum++;
stack.back().func.paralist.push_back(newVar);
}
funcPool[func_name].paralist.push_back(newVar);
//加入到该函数的符号表中
stack.back().varMap.insert({varName,newVar});
if(Isdefinition)
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforParam(newVar));
//对下一个变量进行分析
parseParam(decl_Node->next, func_name, Isdefinition);
}
void parser::parseStat(stat_Node* stat){
if(stat == NULL){
//debug用
cout<<"Stat END"<<endl;
return;
}
stat_kind cur_type = stat->type;
switch (cur_type) {
case LABEL:
parseLabelStat(stat);
break;
case COMPOUND:
parseCompoundStat(stat);
break;
case EXP:
parseExpStat(stat);
break;
case SELECT:
parseSelectStat(stat);
break;
case ITER:
parseIterStat(stat);
break;
case JUMP:
parseJumpStat(stat);
break;
default:
break;
}
return;
}
VarNode parser::parseExp(exp_Node* exp){
VarNode resnode;
resnode = parseAssignExp(exp->info.exp_root.assign_exp);
if(exp->info.exp_root.next_exp != NULL)
resnode = parseExp(exp->info.exp_root.next_exp);
return resnode;
}
void parser::parseLabelStat(stat_Node* lab_stat){
//暂时先没做
return;
}
//**************************************四级单元的PARSE**************************************************
//***************************************STATEMENT*****************************************************
void parser::parseCompoundStat(stat_Node* Compoud_stat){
if(Compoud_stat->stat_info.compound_info.type2 == SINGLE)//type == SINGLE 说明是空语句
return;
else{
block_item* cur_blist = Compoud_stat->stat_info.compound_info.blist;
parseBlist(cur_blist);
}
}
void parser::parseBlist(block_item* blist){
if(blist == NULL)
return;
if(blist->declaration == NULL)//说明是statement
parseStat(blist->statement);
else
parseDecl(blist->declaration);
parseBlist(blist->next);
}
void parser::parseExpStat(stat_Node* Exp_stat){
if(Exp_stat->stat_info.exp_info.exp == NULL)// ;
return;
parseExp(Exp_stat->stat_info.exp_info.exp);
}
void parser::parseSelectStat(stat_Node* Select_stat){
select_kind cur_type = Select_stat->stat_info.select_info.type2;
switch (cur_type) {
case t_IF:
parseIfExp(Select_stat->stat_info.select_info.exp, Select_stat->stat_info.select_info.stat1);
break;
case t_IF_ELSE:
parseIfElseExp(Select_stat->stat_info.select_info.exp, Select_stat->stat_info.select_info.stat1, Select_stat->stat_info.select_info.stat2);
break;
case t_SWITCH:
parseSwitchExp(Select_stat->stat_info.select_info.exp, Select_stat->stat_info.select_info.stat1);
break;
default:
break;
}
}
//这个其实是stat, 打错了名字...暂时先不改了
void parser::parseIfExp(exp_Node* exp, stat_Node* stat){
block newblock;
stack.push_back(newblock);
VarNode exp_rnode = parseExp(exp);
string lab1 = innerCodeGenerator.getLabelname();
string lab2 = innerCodeGenerator.getLabelname();
if(exp_rnode.type == t_BOOL)
innerCodeGenerator.addCode("IF " + exp_rnode.boolstr + " GOTO " + lab1);
else{
string temp_name = "temp" + inttostr(innerCodeGenerator.tempNum);
innerCodeGenerator.tempNum++;
VarNode newNode = createTempVar(temp_name, t_INT);
innerCodeGenerator.addCode(temp_name + " := #0");
innerCodeGenerator.addCode("IF " + innerCodeGenerator.getNodename(newNode) + " != " + temp_name + " GOTO " + lab1);
}
innerCodeGenerator.addCode("GOTO " + lab2);
innerCodeGenerator.addCode("LABEL " + lab1 + " :");
parseStat(stat);
innerCodeGenerator.addCode("LABEL " + lab2 + " :");
stack.pop_back();
}
void parser::parseIfElseExp(exp_Node *exp, stat_Node *stat1, stat_Node *stat2){
block newblock;
stack.push_back(newblock);
VarNode exp_rnode = parseExp(exp);
string lab1 = innerCodeGenerator.getLabelname();
string lab2 = innerCodeGenerator.getLabelname();
string lab3 = innerCodeGenerator.getLabelname();
if(exp_rnode.type == t_BOOL){
innerCodeGenerator.addCode("IF " + exp_rnode.boolstr + " GOTO " + lab1);
}
else{
string temp_name = "temp" + inttostr(innerCodeGenerator.tempNum);
innerCodeGenerator.tempNum++;
VarNode newNode = createTempVar(temp_name, t_INT);
innerCodeGenerator.addCode(temp_name + " := #0");
innerCodeGenerator.addCode("IF " + innerCodeGenerator.getNodename(exp_rnode) + " != " + temp_name + " GOTO " + lab1);
}
innerCodeGenerator.addCode("GOTO " + lab2);
innerCodeGenerator.addCode("LABEL " + lab1 + " :");
parseStat(stat1);
innerCodeGenerator.addCode("GOTO " + lab3);
stack.pop_back();
//else
innerCodeGenerator.addCode("LABEL " + lab2 + " :");
block newblock2;
stack.push_back(newblock2);
parseStat(stat2);
innerCodeGenerator.addCode("LABEL " + lab3 + " :");
stack.pop_back();
}
void parser::parseSwitchExp(exp_Node *exp, stat_Node *stat){
//暂时先空着
}
void parser::parseIterStat(stat_Node *IterStat){
iter_kind cur_type = IterStat->stat_info.iter_info.type2;
switch (cur_type) {
case t_WHILE:
parseWhileExp(IterStat->stat_info.iter_info.exp,IterStat->stat_info.iter_info.stat1);
break;
case t_DO_WHILE:
parseDoWhileExp(IterStat->stat_info.iter_info.stat1, IterStat->stat_info.iter_info.exp);
break;
case FOR1:
parseFor1Exp(IterStat->stat_info.iter_info.stat1, IterStat->stat_info.iter_info.stat2, IterStat->stat_info.iter_info.stat3);
break;
case FOR2:
parseFor2Exp(IterStat->stat_info.iter_info.stat1, IterStat->stat_info.iter_info.stat2, IterStat->stat_info.iter_info.exp, IterStat->stat_info.iter_info.stat3);
break;
case FOR3:
parseFor3Exp(IterStat->stat_info.iter_info.decl, IterStat->stat_info.iter_info.stat1, IterStat->stat_info.iter_info.stat2);
break;
case FOR4:
parseFor4Exp(IterStat->stat_info.iter_info.decl, IterStat->stat_info.iter_info.stat1, IterStat->stat_info.iter_info.exp, IterStat->stat_info.iter_info.stat2);
break;
default:
break;
}
}
void parser::parseWhileExp(exp_Node *exp, stat_Node *stat){
block newblock;
newblock.canBreak = true;
stack.push_back(newblock);
string lab1 = innerCodeGenerator.getLabelname();
string lab2 = innerCodeGenerator.getLabelname();
string lab3 = innerCodeGenerator.getLabelname();
stack.back().breakLabelname = lab3;
innerCodeGenerator.addCode("LABEL " + lab1 + " :");
VarNode exp_rnode = parseExp(exp);
if(exp_rnode.type == t_BOOL){
innerCodeGenerator.addCode("IF " + exp_rnode.boolstr + " GOTO " + lab2 );
}
else{
string temp_name = "temp" + inttostr(innerCodeGenerator.tempNum);
innerCodeGenerator.tempNum++;
VarNode newNode = createTempVar(temp_name, t_INT);
innerCodeGenerator.addCode(temp_name + " := #0");
innerCodeGenerator.addCode("IF " + innerCodeGenerator.getNodename(exp_rnode) + " != " + temp_name + " GOTO " + lab2);
}
innerCodeGenerator.addCode("GOTO " + lab3);
innerCodeGenerator.addCode("LABEL " + lab2 + " :");
parseStat(stat);
innerCodeGenerator.addCode("GOTO " + lab1);
innerCodeGenerator.addCode("LABEL " + lab3 + " :");
stack.pop_back();
}
void parser::parseDoWhileExp(stat_Node *stat, exp_Node *exp){
block newblock;
newblock.canBreak = true;
stack.push_back(newblock);
string lab1 = innerCodeGenerator.getLabelname();
string lab2 = innerCodeGenerator.getLabelname();
stack.back().breakLabelname = lab2;
innerCodeGenerator.addCode("LABEL " + lab1 + " :");
parseStat(stat);
VarNode exp_rnode = parseExp(exp);
if(exp_rnode.type == t_BOOL){
innerCodeGenerator.addCode("IF " + exp_rnode.boolstr + " GOTO " + lab2 );
}
else{
string temp_name = "temp" + inttostr(innerCodeGenerator.tempNum);
innerCodeGenerator.tempNum++;
VarNode newNode = createTempVar(temp_name, t_INT);
innerCodeGenerator.addCode(temp_name + " := #0");
innerCodeGenerator.addCode("IF " + innerCodeGenerator.getNodename(exp_rnode) + " != " + temp_name + " GOTO " + lab1);
}
innerCodeGenerator.addCode("LABEL " + lab2 + " :");
stack.pop_back();
}
void parser::parseFor1Exp(stat_Node *stat1, stat_Node *stat2, stat_Node* stat){
block newblock;
newblock.canBreak = true;
stack.push_back(newblock);
string lab1 = innerCodeGenerator.getLabelname();
string lab2 = innerCodeGenerator.getLabelname();
string lab3 = innerCodeGenerator.getLabelname();
stack.back().breakLabelname = lab3;
parseExpStat(stat1);
innerCodeGenerator.addCode("LABEL " + lab1 + " :");
VarNode exp_rnode;
if(stat2->stat_info.exp_info.exp != NULL){
exp_rnode = parseExp(stat2->stat_info.exp_info.exp);
if(exp_rnode.type == t_BOOL)
innerCodeGenerator.addCode("IF " + exp_rnode.boolstr + " GOTO " + lab2);
else{
string temp_name = "temp" + inttostr(innerCodeGenerator.tempNum);
innerCodeGenerator.tempNum++;
VarNode newnode = createTempVar(temp_name, t_INT);
innerCodeGenerator.addCode(temp_name + " := #0");
innerCodeGenerator.addCode("IF " + innerCodeGenerator.getNodename(exp_rnode) + " GOTO " + lab2);
}
}
else{
innerCodeGenerator.addCode("GOTO " + lab2);
}
innerCodeGenerator.addCode("GOTO " + lab3);
innerCodeGenerator.addCode("LABEL " + lab2 + " :");
parseStat(stat);
innerCodeGenerator.addCode("GOTO " + lab1);
innerCodeGenerator.addCode("LABEL " + lab3 + " :");
stack.pop_back();
}
void parser::parseFor2Exp(stat_Node *stat1, stat_Node *stat2, exp_Node *exp, stat_Node *stat){
block newblock;
newblock.canBreak = true;
stack.push_back(newblock);
string lab1 = innerCodeGenerator.getLabelname();
string lab2 = innerCodeGenerator.getLabelname();
string lab3 = innerCodeGenerator.getLabelname();
stack.back().breakLabelname = lab3;
parseStat(stat1);
innerCodeGenerator.addCode("LABEL " + lab1 + " :");
VarNode exp_rnode;
if(stat2->stat_info.exp_info.exp != NULL){
exp_rnode = parseExp(stat2->stat_info.exp_info.exp);
if(exp_rnode.type == t_BOOL)
innerCodeGenerator.addCode("IF " + exp_rnode.boolstr + " GOTO " + lab2);
else{
string temp_name = "temp" + inttostr(innerCodeGenerator.tempNum);
innerCodeGenerator.tempNum++;
VarNode newnode = createTempVar(temp_name, t_INT);
innerCodeGenerator.addCode(temp_name + " := #0");
innerCodeGenerator.addCode("IF " + innerCodeGenerator.getNodename(exp_rnode) + " != " + temp_name + " GOTO " + lab2);
}
}
else
innerCodeGenerator.addCode("GOTO " + lab2);
innerCodeGenerator.addCode("GOTO " + lab3);
innerCodeGenerator.addCode("LABEL " + lab2 + " :");
parseStat(stat);
parseExp(exp);
innerCodeGenerator.addCode("GOTO " + lab1);
innerCodeGenerator.addCode("LABEL " + lab3 + " :");
stack.pop_back();
}
void parser::parseFor3Exp(declaration_Node *decl, stat_Node *stat1, stat_Node *stat){
block newblock;
newblock.canBreak = true;
stack.push_back(newblock);
string lab1 = innerCodeGenerator.getLabelname();
string lab2 = innerCodeGenerator.getLabelname();
string lab3 = innerCodeGenerator.getLabelname();
stack.back().breakLabelname = lab3;
parseDecl(decl);
innerCodeGenerator.addCode("LABEL " + lab1 + " :");
VarNode exp_rnode;
if(stat1->stat_info.exp_info.exp != NULL){
exp_rnode = parseExp(stat1->stat_info.exp_info.exp);
if(exp_rnode.type == t_BOOL)
innerCodeGenerator.addCode("IF " + exp_rnode.boolstr + " GOTO " + lab2);
else{
string temp_name = "temp" + inttostr(innerCodeGenerator.tempNum);
innerCodeGenerator.tempNum++;
VarNode newnode = createTempVar(temp_name, t_INT);
innerCodeGenerator.addCode(temp_name + " := #0");
innerCodeGenerator.addCode("IF " +innerCodeGenerator.getNodename(exp_rnode) + " != " + temp_name + " GOTO " + lab2);
}
}
else{
innerCodeGenerator.addCode("GOTO " + lab2);
}
innerCodeGenerator.addCode("GOTO " + lab3);
innerCodeGenerator.addCode("LABEL " + lab2 + " :");
stack.pop_back();
}
void parser::parseFor4Exp(declaration_Node *decl, stat_Node *stat1, exp_Node *exp, stat_Node *stat){
block newblock;
newblock.canBreak = true;
stack.push_back(newblock);
string lab1 = innerCodeGenerator.getLabelname();
string lab2 = innerCodeGenerator.getLabelname();
string lab3 = innerCodeGenerator.getLabelname();
parseDecl(decl);
innerCodeGenerator.addCode("LABEL " + lab1 + " :");
VarNode exp_rnode;
if(stat1->stat_info.exp_info.exp != NULL){
exp_rnode = parseExp(stat1->stat_info.exp_info.exp);
if(exp_rnode.type == t_BOOL)
innerCodeGenerator.addCode("IF " + exp_rnode.boolstr + " GOTO " + lab2);
else{
string temp_name = "temp" + inttostr(innerCodeGenerator.tempNum);
innerCodeGenerator.tempNum++;
VarNode newNode = createTempVar(temp_name, t_INT);
innerCodeGenerator.addCode(temp_name + " := #0");
innerCodeGenerator.addCode("IF " + innerCodeGenerator.getNodename(exp_rnode) + " != " + temp_name + " GOTO " + lab2);
}
}
else
innerCodeGenerator.addCode("GOTO " + lab2);
innerCodeGenerator.addCode("GOTO " + lab3);
innerCodeGenerator.addCode("LABEL " + lab2 + " :");
parseStat(stat);
parseExp(exp);
innerCodeGenerator.addCode("GOTO " + lab1);
innerCodeGenerator.addCode("LABEL " + lab3 + " :");
stack.pop_back();
}
void parser::parseJumpStat(stat_Node *stat){
switch (stat->stat_info.jump_info.type2) {
case t_GOTO:
parseGoto(stat);
break;
case t_BREAK:
parseBreak(stat);
break;
case t_CONTINUE:
parseContinue(stat);
break;
case RETURN1://return;
parseReturn1(stat);
break;
case RETURN2://return expression
parseReturn2(stat->stat_info.jump_info.exp);
break;
default:
break;
}
}
void parser::parseGoto(stat_Node *stat){
}
void parser::parseContinue(stat_Node *stat){
}
void parser::parseReturn1(stat_Node *stat){
type_specifier_kind fret_type = getFuncRType();
innerCodeGenerator.addCode("RETURN");
if(fret_type != t_VOID)
error(stat->line, "Non-void function should return a value!");
}
void parser::parseReturn2(exp_Node* exp){
type_specifier_kind fret_type = getFuncRType();
VarNode rnode = parseExp(exp);
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforRet(rnode));
if(rnode.type != fret_type)
error(exp->line, "function return a conflict type value!");
}
void parser::parseBreak(stat_Node *stat){
int num = getBreakBlock();
if(num < 0)
error(stat->line, "Can't break here!");
else
innerCodeGenerator.addCode("GOTO " + stack[num].breakLabelname);
return;
}
//**************************************四级单元的PARSE**************************************************
//****************************************DECLARATION*****************************************************
void parser::parseInitDeclList(declarator_Node *decl_list, type_specifier_kind cur_type){
if(decl_list == NULL)
return;
if(decl_list->type == DECL){
switch (decl_list->info.decl_info.type2) {
case Identifier:
parseIDDecl(decl_list, cur_type);
break;
case ARRAY:
parseArrayDecl(decl_list, cur_type);
break;
case FUNC:
parseFuncDecl(decl_list, cur_type);
break;
default:
break;
}
}
else{// declarator = initializer
//暂时先只处理变量的赋值
VarNode newvar;
declarator_Node *declarator = decl_list->info.init_info.decl_tree;
initializer_Node *initer = decl_list->info.init_info.initalizer;
if(declarator->info.decl_info.type2 != Identifier)
error(declarator->line, getIDname(declarator) + "is not a variable!");
else{
string ID_name = getIDname(declarator);
if(!lookupCurVar(ID_name)){
newvar.name = ID_name;
newvar.type = cur_type;
newvar.num = innerCodeGenerator.varNum++;
newvar.line = declarator->line;
stack.back().varMap.insert({ID_name,newvar});
}
else
error(declarator->line, "Redifinition of " + ID_name );
//处理initializer
if(initer->type != SINGLE)
error(declarator->line, "Wrong value to variable");
else{
VarNode rnode = parseAssignExp(initer->info.assign_exp);
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforAssign(newvar, rnode));
type_specifier_kind rtype = rnode.type;
if(rtype != cur_type)
error(declarator->line, "Wrong type assignment from" + rnode.name + " to " + newvar.name);
}
}
}
parseInitDeclList(decl_list->next, cur_type);
}
void parser::parseIDDecl(declarator_Node *decl_node,type_specifier_kind cur_type){
ID_Node *cur_ID=decl_node->info.decl_info.detail.ID_info.ID_list;
string var_name = cur_ID->name;
if(!lookupCurVar(var_name)){
VarNode newvar;
newvar.name = var_name;
newvar.type = cur_type;
newvar.num = innerCodeGenerator.varNum++;
newvar.line = decl_node->line;
stack.back().varMap.insert({var_name,newvar});
}
else
error(decl_node->line, "Redefinition of '" + var_name + "' ");
}
void parser::parseArrayDecl(declarator_Node *decl_node, type_specifier_kind cur_type){
string arrName = decl_node->info.decl_info.detail.arr_info.decl_tree->info.decl_info.detail.ID_info.ID_list->name;
if(decl_node->info.decl_info.detail.arr_info.arr_type != arr_C_exp)
error(decl_node->line, "Definition of variable with array type needs an explicit size or an initializer");
exp_Node *const_exp = decl_node->info.decl_info.detail.arr_info.exp;
VarNode rnode = parseConstExp(const_exp);
if(rnode.type != t_INT)
error(decl_node->line, "Array size must be int");
VarNode tnode;
if(cur_type == t_INT){
string temp_name = "temp" + inttostr(innerCodeGenerator.tempNum);
innerCodeGenerator.tempNum++;
tnode = createTempVar(temp_name, t_INT);
stack.back().varMap.insert({temp_name,tnode});
VarNode tempVar3;
string temp_name3 = "temp" +inttostr(innerCodeGenerator.tempNum);
innerCodeGenerator.tempNum++;
tempVar3.name = temp_name3;
tempVar3.type = t_INT;
stack.back().varMap.insert({temp_name3,tempVar3});
innerCodeGenerator.addCode(temp_name3 + " := #4");
innerCodeGenerator.addCode(tnode.name + " := " + temp_name3 + " * " + rnode.name);
}
else if(cur_type == t_DOUBLE){
string temp_name = "temp" + inttostr(innerCodeGenerator.tempNum);
innerCodeGenerator.tempNum++;
tnode = createTempVar(temp_name, t_INT);
stack.back().varMap.insert({temp_name,tnode});
VarNode tempVar3;
string temp_name3 = "temp" +inttostr(innerCodeGenerator.tempNum);
innerCodeGenerator.tempNum++;
tempVar3.name = temp_name3;
tempVar3.type = t_INT;
stack.back().varMap.insert({temp_name3,tempVar3});
innerCodeGenerator.addCode(temp_name3 + " := #8");
innerCodeGenerator.addCode(tnode.name + " := " + temp_name3 + " * " + rnode.name);
}
else if(cur_type == t_BOOL)
tnode = rnode;
ArrayNode anode;
anode.name = arrName;
anode.type = cur_type;
anode.num = innerCodeGenerator.arrayNum++;
innerCodeGenerator.addCode("DEC " + innerCodeGenerator.getArrNodename(anode) + " " + tnode.name);
stack.back().arrayMap.insert({arrName,anode});
}
void parser::parseFuncDecl(declarator_Node *dnode, type_specifier_kind cur_type){
string funcName = getIDname(dnode->info.decl_info.detail.func_info.decl_tree);
if(dnode->info.decl_info.detail.func_info.func_type == IDENT)
error(dnode->line,"C requires a type specifier for all declarations");
param_Node *parmlist = dnode->info.decl_info.detail.func_info.list.param_list;
FuncNode newFunc;
newFunc.name = funcName;
newFunc.isdefinied = false;
newFunc.rettype = cur_type;
funcPool.insert({funcName,newFunc});
parseParam(parmlist, funcName, false);
}
//**************************************四级单元的PARSE**************************************************
//*******************************************Expression*********************************************
VarNode parser::parseAssignExp(exp_Node *assignExp){
if(assignExp->info.assign_info.type2 == assign_NA)
return parseCondiExp(assignExp->info.assign_info.unary_exp);
else{
assign_kind op = assignExp->info.assign_info.type2;
VarNode node1 = parseUnaryExp(assignExp->info.assign_info.unary_exp);
VarNode node2 = parseAssignExp(assignExp->info.assign_info.assign_exp);
VarNode node3;
if(op == t_ASSIGNMENT){
node3 = node2;
}
else{
string temp_name = "temp" + inttostr(innerCodeGenerator.tempNum);
innerCodeGenerator.tempNum++;
node3 = createTempVar(temp_name, node1.type);
stack.back().varMap.insert({temp_name, node3});
switch (op) {
case t_MUL_ASSIGN://*=
if(node1.type != node2.type)
error(node1.line, node1.name + " has conflict type with " + node2.name);
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforVar(temp_name, "*" , node1, node2));
break;
case t_DIV_ASSIGN:// /=
if(node1.type != node2.type)
error(node1.line, node1.name + " has conflict type with " + node2.name);
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforVar(temp_name, "/", node1, node2));
break;
case t_MOD_ASSIGN:// %=
if((node1.type != t_INT) || (node2.type != t_INT))
error(node1.line, node1.name + " has conflict type with " + node2.name);
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforVar(temp_name, "%", node1, node2));
break;
case t_ADD_ASSIGN:// +=
if(node1.type != node2.type)
error(node1.line, node1.name + " has conflict type with " + node2.name);
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforVar(temp_name, "+", node1, node2));
break;
case t_SUB_ASSIGN: // -=
if(node1.type != node2.type)
error(node1.line, node1.name + " has conflict type with " + node2.name);
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforVar(temp_name, "-", node1, node2));
break;
case t_LEFT_ASSIGN: // <<=
if((node1.type != t_INT) || (node2.type != t_INT))
error(node1.line, node1.name + " has conflict type with " + node2.name);
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforVar(temp_name, "<<", node1, node2));
break;
case t_RIGHT_ASSIGN:// >>=
if((node1.type != t_INT) || (node2.type != t_INT))
error(node1.line, node1.name + " has conflict type with " + node2.name);
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforVar(temp_name, ">>" ,node1, node2));
break;
case t_AND_ASSIGN:
if((node1.type != t_INT) || (node2.type != t_INT))
error(node1.line, node1.name + " has conflict type with " + node2.name);
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforVar(temp_name, "&", node1, node2));
break;
case t_XOR_ASSIGN:
if((node1.type != t_INT) || (node2.type != t_INT))
error(node1.line, node1.name + " has conflict type with " + node2.name);
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforVar(temp_name, "^", node1, node2));
break;
case t_OR_ASSIGN:
if((node1.type != t_INT) || (node2.type != t_INT))
error(node1.line, node1.name + " has conflict type with " + node2.name);
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforVar(temp_name, "|", node1, node2));
break;
default:
break;
}
}
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforAssign(node1, node3));
return node1;
}
}
VarNode parser::parseLogicalOrExp(exp_Node *logicaloexp){
if(logicaloexp->info.logi_or_info.logical_or_exp == NULL){
return parseLogicalAndExp(logicaloexp->info.logi_or_info.logical_and_exp);
}
else{
VarNode node1 = parseLogicalOrExp(logicaloexp->info.logi_or_info.logical_or_exp);
VarNode node2 = parseLogicalAndExp(logicaloexp->info.logi_or_info.logical_and_exp);
if(node1.type != t_BOOL || node2.type != t_BOOL)
error(logicaloexp->line, "Logical expression need 'bool' type expression!");
string temp_name = "temp" + inttostr(innerCodeGenerator.tempNum);
innerCodeGenerator.tempNum++;
VarNode newNode = createTempVar(temp_name, node1.type);
stack.back().varMap.insert({temp_name,newNode});
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforVar(temp_name, "||", node1, node2));
newNode.boolstr = innerCodeGenerator.getNodename(node1) + " || " + innerCodeGenerator.getNodename(node2);
return newNode;
}
}
VarNode parser::parseLogicalAndExp(exp_Node *LogAndexp){
if(LogAndexp->info.logi_and_info.logical_and_exp == NULL)
return parseIncluOrExp(LogAndexp->info.logi_and_info.inclusive_or_exp);
else{
VarNode node1 = parseLogicalAndExp(LogAndexp->info.logi_and_info.logical_and_exp);
VarNode node2 = parseIncluOrExp(LogAndexp->info.logi_and_info.inclusive_or_exp);
if(node1.type != t_BOOL || node2.type != t_BOOL)
error(LogAndexp->line, "Logical expression need 'bool' type expression!");
string temp_name = "temp" + inttostr(innerCodeGenerator.tempNum);
innerCodeGenerator.tempNum++;
VarNode newNode = createTempVar(temp_name, node1.type);
stack.back().varMap.insert({temp_name,newNode});
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforVar(temp_name, "&&", node1, node2));
newNode.boolstr = innerCodeGenerator.getNodename(node1) + " && " + innerCodeGenerator.getNodename(node2);
return newNode;
}
}
VarNode parser::parseIncluOrExp(exp_Node *InclOrexp){
if(InclOrexp->info.incl_or_info.inclusive_or_exp == NULL)
return parseExcluOrExp(InclOrexp->info.incl_or_info.exclusive_or_exp);
else{
VarNode node1 = parseIncluOrExp(InclOrexp->info.incl_or_info.inclusive_or_exp);
VarNode node2 = parseExcluOrExp(InclOrexp->info.incl_or_info.exclusive_or_exp);
if(node1.type != t_INT || node2.type != t_INT)
error(InclOrexp->line, "Inclusive or expression need 'int' type expression!");
string temp_name = "temp" + inttostr(innerCodeGenerator.tempNum);
innerCodeGenerator.tempNum++;
VarNode newNode = createTempVar(temp_name, node1.type);
stack.back().varMap.insert({temp_name,newNode});
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforVar(temp_name, "|", node1, node2));
newNode.boolstr = innerCodeGenerator.getNodename(node1) + " | " + innerCodeGenerator.getNodename(node2);
return newNode;
}
}
VarNode parser::parseExcluOrExp(exp_Node *ExclOrexp){
if(ExclOrexp->info.excl_or_info.exclusive_or_exp == NULL)
return parseAndExp(ExclOrexp->info.excl_or_info.and_exp);
else{
VarNode node1 = parseExcluOrExp(ExclOrexp->info.excl_or_info.exclusive_or_exp);
VarNode node2 = parseAndExp(ExclOrexp->info.excl_or_info.and_exp);
if(node1.type != t_INT || node2.type != t_INT)
error(ExclOrexp->line, "Exclusive expression need 'int' type expression!");
string temp_name = "temp" + inttostr(innerCodeGenerator.tempNum);
innerCodeGenerator.tempNum++;
VarNode newNode = createTempVar(temp_name, node1.type);
stack.back().varMap.insert({temp_name,newNode});
innerCodeGenerator.addCode(innerCodeGenerator.createCodeforVar(temp_name, "^", node1, node2));
newNode.boolstr = innerCodeGenerator.getNodename(node1) + " ^ " + innerCodeGenerator.getNodename(node2);
return newNode;
}
}
VarNode parser::parseAndExp(exp_Node *Andexp){
if(Andexp->info.and_info.and_exp == NULL)
return parseEqualExp(Andexp->info.and_info.equal_exp);
else{
VarNode node1 = parseAndExp(Andexp->info.and_info.and_exp);
VarNode node2 = parseEqualExp(Andexp->info.and_info.equal_exp);
if(node1.type != t_INT || node2.type != t_INT)
error(Andexp->line, "And expression need 'int' type expression!");