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semanticAnalyzer.c
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#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include "trieDef.h"
#include "trie.h"
#include "rulesDef.h"
#include "rules.h"
#include "parseTreeDef.h"
#include "parseTree.h"
#include "helperDef.h"
#include "stackDef.h"
#include "stack.h"
#include "helper.h"
#include "parser.h"
#include "lexerDef.h"
#include "lexer.h"
#include "dynamicArrayDef.h"
#include "dynamicArray.h"
#include "enum.h"
#include "operators.h"
//#include "operators.h"
#include <math.h>
#include "scopeHashTableDef.h"
#include "recordsHashTableDef.h"
#include "scopeHashTable.h"
#include "allFunctionsHashTableDef.h"
#include "allFunctionsHashTable.h"
#include "recordsHashTable.h"
#include "semanticAnalyzerDef.h"
#include "quadrupleDef.h"
#include "quadruple.h"
#include "registerDef.h"
#include "register.h"
#include "registers.h"
void makeAST(parseTreeNode *head, ruleq **newRules, parseTreeNode *param){
if (head == NULL){
return;
}
if (head->index == BOOLEANEXPRESSION){
parseTreeNode *child1 = head->child;
parseTreeNode *operand1;// = child1->next;
parseTreeNode *opert;// = operand1->next->next;
parseTreeNode *operand2;// = opert->next->next;
switch(child1->index){
case TK_OP:
{
operand1 = child1->next;
opert = operand1->next->next;
operand2 = opert->next->next;
opert = opert->child;
operand1->next = operand2;
operand2->next = NULL;
operand1->parent = opert;
operand2->parent = opert;
opert->child = operand1;
parseTreeNode *par = head->parent->child;
if (par == head){
head->parent->child = opert;
opert->parent = head->parent;
}
else {
while (par->next != head){
par = par->next;
}
par->next = opert;
opert->parent = par->parent;
}
opert->next = head->next;
opert->replacedNode = head->index;
makeAST(operand1,newRules,NULL);
makeAST(operand2,newRules,NULL);
break;
}
case VAR:
{
operand1 = child1;
opert = child1->next;
operand2 = opert->next;
opert = opert->child;
operand1->next = operand2;
operand2->next = NULL;
operand1->parent = opert;
operand2->parent = opert;
opert->child = operand1;
parseTreeNode *par = head->parent->child;
if (par == head){
head->parent->child = opert;
opert->parent = head->parent;
}
else {
while (par->next != head){
par = par->next;
}
par->next = opert;
opert->parent = par->parent;
}
opert->next = head->next;
opert->replacedNode = head->index;
makeAST(operand1,newRules,NULL);
makeAST(operand2,newRules,NULL);
break;
}
case TK_NOT:
{
opert = child1;
operand1 = opert->next->next;
operand1->next = NULL;
operand1->parent = opert;
opert->child = operand1;
parseTreeNode *par = head->parent->child;
if (par == head){
head->parent->child = opert;
opert->parent = head->parent;
}
else {
while (par->next != head){
par = par->next;
}
par->next = opert;
opert->parent = par->parent;
}
opert->next = head->next;
opert->replacedNode = head->index;
makeAST(operand1,newRules,NULL);
break;
}
}
if (opert->index == TK_LT){
opert->nodeSymbol = (char *)malloc(sizeof(char) * 3);
strcpy(opert->nodeSymbol,"<");
}
else if (opert->index == TK_LE){
opert->nodeSymbol = (char *)malloc(sizeof(char) * 3);
strcpy(opert->nodeSymbol,"<=");
}
else if (opert->index == TK_GT){
opert->nodeSymbol = (char *)malloc(sizeof(char) * 3);
strcpy(opert->nodeSymbol,">");
}
else if (opert->index == TK_GE){
opert->nodeSymbol = (char *)malloc(sizeof(char) * 3);
strcpy(opert->nodeSymbol,">=");
}
else if (opert->index == TK_EQ){
opert->nodeSymbol = (char *)malloc(sizeof(char) * 3);
strcpy(opert->nodeSymbol,"==");
}
else if (opert->index == TK_NE){
opert->nodeSymbol = (char *)malloc(sizeof(char) * 3);
strcpy(opert->nodeSymbol,"!=");
}
else if (opert->index == TK_AND){
opert->nodeSymbol = (char *)malloc(sizeof(char) * 4);
strcpy(opert->nodeSymbol,"&&&");
}
else if (opert->index == TK_OR){
opert->nodeSymbol = (char *)malloc(sizeof(char) * 4);
strcpy(opert->nodeSymbol,"@@@");
}
else if (opert->index == TK_NOT){
opert->nodeSymbol = (char *)malloc(sizeof(char) * 3);
strcpy(opert->nodeSymbol,"~");
}
return;
}
else if (head->index == ARITHMETICEXPRESSION || head->index == TERM){ //
parseTreeNode *child1 = head->child;
parseTreeNode *child2 = child1->next;
child1->next = NULL;
makeAST(child1, newRules, NULL);
child1->parent->child = child1->child; //new add
child1->child->parent = child1->parent;//new add 2
child1 = child1->parent->child; //new add
//makeAST(child2, newRules,head->child); //new delete
makeAST(child2, newRules,child1); //new add
if (head->index == ARITHMETICEXPRESSION && head->parent->child->index == TK_OP){
//printf("in\n");
if (head->parent->index == FACTOR){
// head->child->next = head->parent->parent->child->next;
// printf("in in\n");
// head->parent->parent->child = head->child;
// head->child->parent = head->parent->parent;
head->child->next = NULL;
//printf("in in\n");
head->parent->child = head->child;
head->child->parent = head->parent;
}
}
else {
head->parent->child->next = head->child;
head->child->parent = head->parent->child->parent;
head->child->next = NULL;
}
return;
}
else if (head->index == EXPPRIME || head->index == TERMPRIME){ //
parseTreeNode *child1 = head->child;
if (child1->index == EPS){
head->parent->child = param;
param->parent = head->parent;
}
else {
parseTreeNode *child2 = child1->next;
parseTreeNode *child3 = child2->next;
child1->next = NULL;
child2->next = NULL;
makeAST(child1, newRules,NULL);
child1 = head->child;
child1->child = param;//child1 is operator.
param->parent = child1;//param is left operand
child2->parent = child1;//child2 is right operand
param->next = child2;
makeAST(child2, newRules,NULL);
parseTreeNode *opert = head->child;
parseTreeNode *operand1 = opert->child;
parseTreeNode *operand2 = operand1->next;
if ( (operand1->index == TK_NUM && operand2->index == TK_NUM) || (operand1->index == TK_RNUM && operand2->index == TK_RNUM) ){
opert->child = NULL;
opert->isLeafNode = 1;
opert->isNumber = 1;
free(opert->lexemeCurrentNode);
int oper1len = strlen(operand1->lexemeCurrentNode);
int oper2len = strlen(operand2->lexemeCurrentNode);
int oplen = (oper1len > oper2len ) ? oper1len + 3 : oper2len + 3;
opert->lexemeCurrentNode = (char *)malloc(sizeof(char) * oplen);
strcpy(opert->nodeSymbol,operand1->nodeSymbol);
strcpy(opert->token,operand1->token);
switch(opert->index){
case TK_PLUS:
{
sprintf(opert->lexemeCurrentNode,"%lf",operand1->valueIfNumber + operand2->valueIfNumber);
opert->valueIfNumber = operand1->valueIfNumber + operand2->valueIfNumber;
opert->index = operand1->index;
break;
}
case TK_MINUS:
{
sprintf(opert->lexemeCurrentNode,"%lf",operand1->valueIfNumber - operand2->valueIfNumber);
opert->valueIfNumber = operand1->valueIfNumber - operand2->valueIfNumber;
opert->index = operand1->index;
break;
}
case TK_MUL:
{
sprintf(opert->lexemeCurrentNode,"%lf",operand1->valueIfNumber * operand2->valueIfNumber);
opert->valueIfNumber = operand1->valueIfNumber * operand2->valueIfNumber;
opert->index = operand1->index;
break;
}
case TK_DIV:
{
sprintf(opert->lexemeCurrentNode,"%lf",operand1->valueIfNumber / operand2->valueIfNumber);
opert->valueIfNumber = operand1->valueIfNumber / operand2->valueIfNumber;
opert->index = operand1->index;
break;
}
}
}
makeAST(child3, newRules,child1);
head->parent->child = head->child;
head->child->parent = head->parent;
}
return;
}
parseTreeNode *curr = head->child;
while (curr!=NULL){
parseTreeNode *next = curr->next;
makeAST(curr,newRules,NULL);
curr = next;
}
if (head->ruleno == -1){
return;
}
else {
if (head->index == FACTOR || head->index == LOWPRECEDENCEOPERATORS || head->index == TERM || head->index == HIGHPRECEDENCEOPERATORS){
return;
}
//head->replacedNodesCount denotes the position of head in the linkedlist starting from head->parent->child (which child is head of its parent)
parseTreeNode *headnew = (head->replacedNodesCount == 0) ? head : head->parent->child;
int replacedCount = 1;
while (replacedCount < head->replacedNodesCount){
headnew = headnew->next;
replacedCount++;
}
if (headnew->index == TK_PLUS){
headnew->nodeSymbol = (char *)malloc(sizeof(char) * 8);
strcpy(headnew->nodeSymbol,"TK_PLUS");
}
else if (headnew->index == TK_MINUS){
headnew->nodeSymbol = (char *)malloc(sizeof(char) * 9);
strcpy(headnew->nodeSymbol,"TK_MINUS");
}
else if (headnew->index == TK_MUL){
headnew->nodeSymbol = (char *)malloc(sizeof(char) * 7);
strcpy(headnew->nodeSymbol,"TK_MUL");
}
else if (headnew->index == TK_DIV){
headnew->nodeSymbol = (char *)malloc(sizeof(char) * 7);
strcpy(headnew->nodeSymbol,"TK_DIV");
}
if (newRules[head->ruleno]->index == 0){
if (head->index == TK_ENDIF){
//newRules[head->ruleno]->index = 1;
ASTNode *temp = head->parent;
temp->child = NULL;
temp->replacedNode = temp->index;
temp->index = EPS;
temp->isLeafNode = 1;
temp->isNumber = 0;
temp->token = (char *)malloc(sizeof(char) * 4);
strcpy(temp->token,"eps");
temp->next = NULL;
temp->nodeSymbol = (char *)malloc(sizeof(char) * 5);
strcpy(temp->nodeSymbol,"----");
temp->lexemeCurrentNode = temp->nodeSymbol;
//temp->lexemeCurrentNode = NULL;
}
return;
}
if (newRules[head->ruleno]->index == 1){
if (newRules[head->ruleno]->head->val == head->index){
parseTreeNode *par = headnew->parent;
parseTreeNode *parpar = par->parent;
parseTreeNode *temp = parpar->child;
headnew->replacedNode = par->index; //headnew->replacedNode indicates the node which it replaced
if (par == temp){
parpar->child = headnew;
//headnew->parent = parpar; //new add
headnew->next = par->next;
par->replacedNodesCount = 1;
}
else {
int count = 2;
while (temp->next != par){
temp = temp->next;
count++;
}
temp->next = headnew;
//headnew->parent = parpar;
headnew->next = par->next;
par->replacedNodesCount = count;
}
headnew->parent = parpar;
}
}
else {
if (headnew->next == NULL){
if (head->ruleno == 36 || head->ruleno == 67 || head->ruleno == 68 || head->ruleno == 69 ){
return;
}
parseTreeNode *temp = headnew->parent->child;
parseTreeNode *prev = NULL;
parseTreeNode *par = headnew->parent;
ruleNode *list = newRules[head->ruleno]->head;
int count = 0;
int limit = newRules[head->ruleno]->index;
while (count < limit){
if (temp->replacedNode == list->val){
prev = temp;
temp = temp->next;
list = list->next;
count++;
}
else {
if (prev == NULL){
par->child = temp->next;
}
else {
prev->next = temp->next;
}
temp = temp->next;
}
}
prev->next = NULL;
}
}
}
return;
}
int canBeAdded(int index){
return (index == TK_FUNID
|| index == TK_ID
|| index == TK_REAL
|| index == TK_INT
|| index == TK_RECORDID
|| index == TK_FIELDID
|| index == TK_GLOBAL
|| index == TK_READ
|| index == TK_WRITE
|| index == TK_NUM
|| index == TK_RNUM
|| index == TK_NOT
|| index == TK_OR
|| index == TK_AND
|| index == TK_LT
|| index == TK_LE
|| index == TK_EQ
|| index == TK_GT
|| index == TK_GE
|| index == TK_NE
|| index == TK_DIV
|| index == TK_MUL
|| index == TK_MINUS
|| index == TK_PLUS
|| index == EPS);
}
void dfsForScopeTables(ASTNode *head, recordsHashTable *rht, allFunctionsHashTable *afht, scopeHashTable *currentScope, scopeHashTable *globalScope, typeNode **tn, int *recWidth, IONode **ion, scopeHashTable *recFields, char *fname, int *offset, FILE *fp, int *success){
switch (head->index){
case PROGRAM:
{
// rht = createRecordsHashTable(5,7);
// afht = createAllFunctionsHashTable(5,7);
// globalScope = createScopeHashTable(5,7);
ASTNode *child1 = head->child;
ASTNode *child2 = child1->next;
*offset = -1;
dfsForScopeTables(child1,rht,afht,NULL,globalScope,NULL,NULL,NULL,NULL,NULL,offset,fp,success);
char *fn = (char *)malloc(sizeof(char)*6);
strcpy(fn,"_main");
currentScope = createScopeHashTable(5,7);
//printf("%d %d \n",currentScope->elements, currentScope->f);
allFunctionsHashNode *temp = createAllFunctionsHashNode(fn,currentScope);
insertAllFunctionsHashTable(temp,afht);
*offset = -1; // change to 0 to work if only main function
dfsForScopeTables(child2,rht,afht,currentScope,globalScope,NULL,NULL,NULL,NULL,fn,offset,fp,success);
*offset = -1;
break;
}
case FUNCTION:
{
ASTNode *child1 = head->child;
ASTNode *child2 = child1->next;
ASTNode *child3 = child2->next;
ASTNode *child4 = child3->next;
currentScope = createScopeHashTable(5,7);
//printf("%d %d \n",currentScope->elements, currentScope->f);
allFunctionsHashNode *temp = createAllFunctionsHashNode(child1->lexemeCurrentNode,currentScope);
int inserted = insertAllFunctionsHashTable(temp,afht);
if (inserted == 0){
fprintf(fp,"Line <%d>: The funcion <%s> is redeclared.\n", child1->lineno, child1->lexemeCurrentNode);
*success = 0;
}
fname = child1->lexemeCurrentNode;
dfsForScopeTables(child2,rht,afht,currentScope,globalScope,NULL,NULL,&(temp->data->input_params),NULL,fname,offset,fp,success);
dfsForScopeTables(child3,rht,afht,currentScope,globalScope,NULL,NULL,&(temp->data->output_params),NULL,fname, offset,fp,success);
dfsForScopeTables(child4,rht,afht,currentScope,globalScope,NULL,NULL,NULL,NULL,fname, offset,fp,success);
break;
}
case PARAMETER_LIST:
{
ASTNode *child1 = head->child;
ASTNode *child2 = child1->next;
ASTNode *child3 = child2->next;
//printf("%d %d \n",currentScope->elements, currentScope->f);
scopeHashNode *temp = createScopeHashNode(child2->lexemeCurrentNode,child1->lexemeCurrentNode,child2,offset);
int inserted = insertScopeHashTable(temp,currentScope);
if (inserted == 0){
fprintf(fp,"Line <%d>: The identifier <%s> is declared more than once.\n", child2->lineno, child2->lexemeCurrentNode);
*success = 0;
}
//IONode **headptr = ion;
*ion = createIONode(child1->lexemeCurrentNode, child2->lexemeCurrentNode);
dfsForScopeTables(child3,rht,afht,currentScope,globalScope,NULL,NULL,&((*ion)->next),NULL,fname, offset,fp,success);
break;
}
case DECLARATION:
{
ASTNode *child1 = head->child;
ASTNode *child2 = child1->next;
ASTNode *child3 = child2->next;
//printf("%d %d \n",currentScope->elements, currentScope->f);
scopeHashNode *temp = createScopeHashNode(child2->lexemeCurrentNode,child1->lexemeCurrentNode,child2,offset);
switch (child1->index){
case TK_INT:
{
*offset = *offset + INT_SIZE ;
break;
}
case TK_REAL:
{
*offset = *offset + REAL_SIZE ;
break;
}
default:
{
recordHashNode *rhn = searchEntryRecordsHashTable(child1->lexemeCurrentNode,rht);
if (rhn != NULL){
*offset = *offset + rhn->data->width;
}
break;
}
}
if (child3->index == EPS){
int inserted = insertScopeHashTable(temp,currentScope);
if (inserted == 0){
fprintf(fp,"Line <%d>: The identifier <%s> is declared more than once.\n", child2->lineno, child2->lexemeCurrentNode);
*success = 0;
}
}
else {
int inserted = insertScopeHashTable(temp,globalScope);
if (inserted == 0){
fprintf(fp,"Line <%d>: The identifier <%s>, being a global identifier, cannot be declared more than once.\n", child2->lineno, child2->lexemeCurrentNode);
*success = 0;
//printf("Error 3: Global Identifier Redeclaration\n");
}
}
break;
}
case TYPEDEFINITION:
{
ASTNode *child1 = head->child;
ASTNode *child2 = child1->next;
recordHashNode *temp = createRecordHashNode(child1->lexemeCurrentNode);
insertRecordsHashTable(temp,rht);
dfsForScopeTables(child2,rht,afht,currentScope,globalScope,&(temp->data->type),&(temp->data->width),NULL,temp->data->fields,fname, offset,fp,success);
//printf("%d %d \n",currentScope->elements, currentScope->f);
break;
}
case FIELDDEFINITIONS:
{
ASTNode *child1 = head->child;
ASTNode *child2 = child1->next;
ASTNode *child3 = child2->next;
// int prev_offset = *offset;
// *offset = 0;
scopeHashNode *temp1 = createScopeHashNode(child1->child->next->lexemeCurrentNode,child1->child->lexemeCurrentNode,child1->child,recWidth);
insertScopeHashTable(temp1,recFields);
*tn = createTypeNode(child1->child->index,child1->child->next->lexemeCurrentNode);
tn = &((*tn)->next);
*recWidth = *recWidth + ((child1->child->index == TK_INT) ? INT_SIZE : REAL_SIZE) ;
recFields->offset = *recWidth;
scopeHashNode *temp2 = createScopeHashNode(child2->child->next->lexemeCurrentNode,child2->child->lexemeCurrentNode,child1->child,recWidth);
insertScopeHashTable(temp2,recFields);
*tn = createTypeNode(child2->child->index,child2->child->next->lexemeCurrentNode);
tn = &((*tn)->next);
*recWidth = *recWidth + ((child2->child->index == TK_INT) ? INT_SIZE : REAL_SIZE) ;
recFields->offset = *recWidth;
//printf("%d %d \n",currentScope->elements, currentScope->f);
dfsForScopeTables(child3,rht,afht,currentScope,globalScope,tn,recWidth,NULL,recFields,fname, offset,fp,success);
break;
}
case MOREFIELDS:
{
ASTNode *child1 = head->child;
ASTNode *child2 = child1->next;
scopeHashNode *temp1 = createScopeHashNode(child1->child->next->lexemeCurrentNode,child1->child->lexemeCurrentNode,child1->child,recWidth);
insertScopeHashTable(temp1,recFields);
*tn = createTypeNode(child1->child->index,child1->child->next->lexemeCurrentNode);
tn = &((*tn)->next);
*recWidth = *recWidth + ((child1->child->index == TK_INT) ? INT_SIZE : REAL_SIZE );
recFields->offset = *recWidth;
//printf("%d %d \n",currentScope->elements, currentScope->f);
dfsForScopeTables(child2,rht,afht,currentScope,globalScope,tn,recWidth,NULL,recFields,fname, offset,fp,success);
break;
}
case FUNCALLSTMT:
{
ASTNode *child1 = head->child;
ASTNode *child2 = child1->next;
//ASTNode *child3 = child2->next;
if (strcmp(fname,child2->lexemeCurrentNode) == 0){
fprintf(fp,"Line <%d>: The funcion <%s> is invoked recursively.\n", child2->lineno, child2->lexemeCurrentNode);
*success = 0;
//printf("Error:10 Function invoked recursively\n");
}
allFunctionsHashNode *temp = searchEntryAllFunctionsHashTable(child2->lexemeCurrentNode,afht);
if (temp == NULL){
fprintf(fp,"Line <%d>: The funcion <%s> is undefined.\n", child2->lineno, child2->lexemeCurrentNode);
*success = 0;
//printf("Error:14 Function definition must precede the use\n");
}
//printf("%d %d \n",currentScope->elements, currentScope->f);
}
default:
{
ASTNode *curr = head->child;
while (curr!=NULL){
//parseTreeNode *next = curr->next;
dfsForScopeTables(curr,rht,afht,currentScope,globalScope,tn,recWidth,ion,NULL,fname, offset,fp,success);
//printf("%d %d \n",(currentScope != NULL ) ? (currentScope->elements, currentScope->f) : (0,0));
curr = curr->next;
}
break;
}
}
}
////////////////////////////////////////////////////
void dfsForSemanticAnalysis(ASTNode *head, recordsHashTable *rht, allFunctionsHashTable *afht, scopeHashTable *currentScope, scopeHashTable *globalScope, char *fname, char **argtype, whileScopeList *headWhile, whileScopeList *tailWhile, int mylabel, int nextlabel, int grandnextlabel, int *ptrAvailableLabels, int *ptrAvailableTemporary, int jumpIfTrue, int jumpIfFalse, int shouldOutputLabel, int *success, quadruple *q, dynamicArray *da, int *maxoffset, FILE *fp, int *ln){
switch (head->index){
case PROGRAM:
{
ASTNode *child1 = head->child;
ASTNode *child2 = child1->next;
dfsForSemanticAnalysis(child1,rht,afht,NULL,globalScope,NULL,NULL,NULL,NULL, mylabel, nextlabel, grandnextlabel, ptrAvailableLabels, ptrAvailableTemporary, jumpIfTrue, jumpIfFalse, shouldOutputLabel, success, q, da , maxoffset, fp, ln);
char *fn = (char *)malloc(sizeof(char)*6);
strcpy(fn,"_main");
currentScope = searchEntryAllFunctionsHashTable(fn,afht)->data->scope;
dfsForSemanticAnalysis(child2,rht,afht,currentScope,globalScope,fn,NULL,NULL,NULL, mylabel, nextlabel, grandnextlabel, ptrAvailableLabels, ptrAvailableTemporary, jumpIfTrue, jumpIfFalse, shouldOutputLabel, success, q, da , maxoffset, fp, ln);
break;
}
case FUNCTION:
{
ASTNode *child1 = head->child;
// ASTNode *child2 = child1->next;
// ASTNode *child3 = child2->next;
// ASTNode *child4 = child3->next;
currentScope = searchEntryAllFunctionsHashTable(child1->lexemeCurrentNode,afht)->data->scope;
fname = child1->lexemeCurrentNode;
while (child1!=NULL){
dfsForSemanticAnalysis(child1,rht,afht,currentScope,globalScope,fname,NULL,NULL,NULL, mylabel, nextlabel, grandnextlabel, ptrAvailableLabels, ptrAvailableTemporary, jumpIfTrue, jumpIfFalse, shouldOutputLabel, success, q, da , maxoffset, fp, ln);
child1 = child1->next;
}
ASTNode *outparams = head->child->next->next;
while (outparams->index != EPS){
scopeHashNode *temp = searchEntryScopeHashTable(outparams->child->next->lexemeCurrentNode,currentScope);
if (temp != NULL){
if (temp->data->isChanged != 1){
*success = 0;
fprintf(fp,"Line <%d>: The parameter <%s>, returned by the funcion must be assigned a value\n",outparams->child->next->lineno, outparams->child->next->lexemeCurrentNode );
//fprintf(fp,"Error 5:The parameters being returned by a function must be assigned a value\n");
break;
}
else {
temp->data->isChanged = 0;
outparams = outparams->child->next->next;
}
}
else {
break;
}
}
break;
}
case PARAMETER_LIST:
{
ASTNode *child1 = head->child;
ASTNode *child2 = child1->next;
ASTNode *child3 = child2->next;
//printf("%d %d \n",currentScope->elements, currentScope->f);
//scopeHashNode *temp = createScopeHashNode(child2->lexemeCurrentNode,child1->lexemeCurrentNode,child2,offset);
//int inserted = insertScopeHashTable(temp,currentScope);
// if (inserted == 0){
// printf("Error 1: Identifier Redeclaration\n");
// }
// IONode **headptr = ion;
// *ion = createIONode(child1->lexemeCurrentNode);
if (child1->index == TK_RECORDID){
recordHashNode *r = searchEntryRecordsHashTable(child1->lexemeCurrentNode,rht);
if (r==NULL){
*success = 0;
fprintf(fp,"Line <%d>: The record definition for <%s> was not found\n", child1->lineno, child1->lexemeCurrentNode);
//printf("Error 12: Record definition not found\n");
}
else {
scopeHashNode *t = searchEntryScopeHashTable(child2->lexemeCurrentNode,currentScope);
if (t != NULL){
t->data->offset = currentScope->offset;
currentScope->offset = currentScope->offset + r->data->width;
}
}
}
else {
scopeHashNode *t = searchEntryScopeHashTable(child2->lexemeCurrentNode,currentScope);
if (t != NULL){
t->data->offset = currentScope->offset;
currentScope->offset = currentScope->offset + ((child1->index == TK_INT) ? INT_SIZE : REAL_SIZE );
}
}
//dfsForScopeTables(child3,rht,afht,currentScope,globalScope,NULL,NULL,&((*ion)->next),NULL,fname, offset);
dfsForSemanticAnalysis(child3,rht,afht,currentScope,globalScope,fname,NULL,headWhile,tailWhile, mylabel, nextlabel, grandnextlabel, ptrAvailableLabels, ptrAvailableTemporary, jumpIfTrue, jumpIfFalse, shouldOutputLabel, success, q, da , maxoffset, fp, ln);
break;
}
case DECLARATION:
{
ASTNode *child1 = head->child;
ASTNode *child2 = child1->next;
ASTNode *child3 = child2->next;
scopeHashTable *searchScope = globalScope;
if (child3->index == EPS){
scopeHashNode *exists = searchEntryScopeHashTable(child2->lexemeCurrentNode,globalScope);
if (exists != NULL){
*success = 0;
printf("Line <%d>: The identifier <%s>, being global, cannot be redeclared as local identifer.\n", child2->lineno, child2->lexemeCurrentNode);
//printf("Error 3: Global Identifier Redeclaration. Trying to declare a local variable with global variable name.\n");
}
searchScope = currentScope;
}
if (child1->index == TK_RECORDID){
recordHashNode *r = searchEntryRecordsHashTable(child1->lexemeCurrentNode,rht);
if (r==NULL){
*success = 0;
fprintf(fp,"Line <%d>: The record definition for <%s> was not found\n", child1->lineno, child1->lexemeCurrentNode);
//printf("Error 12: Record definition not found\n");
}
else {
scopeHashNode *t = searchEntryScopeHashTable(child2->lexemeCurrentNode,searchScope);
if (t != NULL){
t->data->offset = searchScope->offset;
searchScope->offset = searchScope->offset + r->data->width;
}
}
}
else {
scopeHashNode *t = searchEntryScopeHashTable(child2->lexemeCurrentNode,searchScope);
if (t != NULL){
t->data->offset = searchScope->offset;
searchScope->offset = searchScope->offset + ((child1->index == TK_INT) ? INT_SIZE : REAL_SIZE );
}
}
//printf("%d %d ",currentScope->elements,currentScope->f);
break;
}
case TK_ID:
{
int parent = head->parent->index;
if (parent != DECLARATION){
scopeHashNode *exists = searchEntryScopeHashTable(head->lexemeCurrentNode,currentScope);
if (exists == NULL){
exists = searchEntryScopeHashTable(head->lexemeCurrentNode,globalScope);
if (exists == NULL){
*success = 0;
fprintf(fp,"Line <%d>: The identifier <%s> is undefined.\n", head->lineno, head->lexemeCurrentNode);
//printf("Error 2: Identifier must be declared before its use\n");
}
else {
if (parent == SINGLEORRECID){
ASTNode *parpar = head->parent->parent;
//int parpar = head->parent->parent->index;
if (parpar->index == ASSIGNMENTSTMT || (parpar->index == IOSTMT && parpar->child->index == TK_READ)){
exists->data->isChanged = 1;
whileScopeList *tt = headWhile;
while (tt != NULL){
if (tt->isChanged == 0){
scopeHashNode *d = searchEntryScopeHashTable(head->lexemeCurrentNode,tt->wsht);
if (d!=NULL){
tt->isChanged = 1;
}
}
tt = tt->next;
}
}
}
} //not needed since global variables cannot be returned
}
else {
if (parent == SINGLEORRECID){
ASTNode *parpar = head->parent->parent;
if (parpar->index == ASSIGNMENTSTMT || (parpar->index == IOSTMT && parpar->child->index == TK_READ) ){
exists->data->isChanged = 1;
whileScopeList *tt = headWhile;
while (tt != NULL){
if (tt->isChanged == 0){
scopeHashNode *d = searchEntryScopeHashTable(head->lexemeCurrentNode,tt->wsht);
if (d!=NULL){
tt->isChanged = 1;
}
}
tt = tt->next;
}
}
}
}
}
break;
}
case FUNCALLSTMT:
{
ASTNode *child1 = head->child;
ASTNode *child2 = child1->next;
ASTNode *child3 = child2->next;
IONode *in = searchEntryAllFunctionsHashTable(child2->lexemeCurrentNode,afht)->data->input_params;
IONode *on = searchEntryAllFunctionsHashTable(child2->lexemeCurrentNode,afht)->data->output_params;
if (on == NULL){
if (child1->index != EPS){
*success = 0;
fprintf(fp,"Line <%d>: The function <%s> does not return any value. It must be invoked appropriately.\n",child2->lineno, child2->lexemeCurrentNode);
//printf("Error 6: The function that does not return any value, must be invoked appropriately.\n");
}
}
else {
child1 = child1->child;
while (child1!=NULL && on !=NULL){
scopeHashNode *temp = searchEntryScopeHashTable(child1->lexemeCurrentNode,currentScope);
if (temp == NULL){
temp = searchEntryScopeHashTable(child1->lexemeCurrentNode,globalScope);
}
if (temp != NULL){
temp->data->isChanged = 1;
whileScopeList *tt = headWhile;
while (tt != NULL){
if (tt->isChanged == 0){
scopeHashNode *d = searchEntryScopeHashTable(child1->lexemeCurrentNode,tt->wsht);
if (d!=NULL){
tt->isChanged = 1;
}
}
tt = tt->next;
}
if (strcmp(temp->data->typeName,on->param) != 0){
*success = 0;
fprintf(fp,"Line <%d>: The type <%s> of variable <%s> returned does not match with the type <%s> of the formal output parameter <%s>\n",child1->lineno, on->param, on->paramname, temp->data->typeName, child1->lexemeCurrentNode );
//printf("Error 4:output params type not matching\n");
//printf("Error 4:output params type not matching\n");
break;
}
else {
child1 = child1->next->child;
on = on->next;
}
}
else {
*success = 0;
fprintf(fp,"Line <%d>: The identifier <%s> is undefined.\n", child1->lineno, child1->lexemeCurrentNode);
//printf("Line <%d>: Error 4:output params not matching. no such identifier exists\n");
break;
}
}
if (on != NULL && child1 == NULL){
*success = 0;
fprintf(fp,"Line <%d>: The number of output parametrs at function call <%s> is incorrect.\n", child2->lineno, child2->lexemeCurrentNode);
//printf("Error 4:output params not matching. actual list long\n");
}
if (child1 != NULL && on == NULL){
*success = 0;
fprintf(fp,"Line <%d>: The number of output parametrs at function call <%s> is incorrect.\n", child2->lineno, child2->lexemeCurrentNode);
//printf("Error 4:output params not matching. used list long\n");
}
}
////////////////
child3 = child3->child;
child1 = child3;
on = in;
while (child1!=NULL && on !=NULL){
scopeHashNode *temp = searchEntryScopeHashTable(child1->lexemeCurrentNode,currentScope);
if (temp == NULL){
temp = searchEntryScopeHashTable(child1->lexemeCurrentNode,globalScope);
}
if (temp != NULL){
if (strcmp(temp->data->typeName,on->param) != 0){
*success = 0;
fprintf(fp,"Line <%d>: The type <%s> of variable <%s> returned does not match with the type <%s> of the formal output parameter <%s>\n",child1->lineno, on->param, on->paramname, temp->data->typeName, child1->lexemeCurrentNode );
//printf("Error 4:input params type not matching\n");
break;
}
else {
child1 = child1->next->child;
on = on->next;
}
}
else {
*success = 0;
fprintf(fp,"Line <%d>: The identifier <%s> is undefined.\n",child1->lineno, child1->lexemeCurrentNode);
//printf("Error 4:input params not matching. no such identifier exists\n");
break;
}
}
if (on != NULL && child1 == NULL){
*success = 0;
fprintf(fp,"Line <%d>: The number of input parametrs at function call <%s> is incorrect.\n", child2->lineno, child2->lexemeCurrentNode);
//printf("Error 4:input params not matching. actual list long\n");
}
if (child1 != NULL && on == NULL){
*success = 0;
fprintf(fp,"Line <%d>: The number of input parametrs at function call <%s> is incorrect.\n",child2->lineno, child2->lexemeCurrentNode);
//printf("Error 4:input params not matching. used list long\n");
}
break;
}
case ELSEPART:
case OTHERSTMTS:
{
ASTNode *child1 = head->child;
ASTNode *child2 = child1->next;
int mylbl1,mylbl2,nxtlbl1,nxtlbl2,grndlbl1,grndlbl2;
mylbl1 = mylabel;
if (child2->index == EPS){
if (grandnextlabel == -1){
//nxtlbl1 = *ptrAvailableLabels;
nxtlbl1 = *ptrAvailableLabels;
// (*ptrAvailableLabels)++;
}
else {
nxtlbl1 = grandnextlabel;
}
}
else {
nxtlbl1 = *ptrAvailableLabels;
}
if (grandnextlabel == -1){
grndlbl1 = *ptrAvailableLabels;
}
else {
grndlbl1 = grandnextlabel;
}
if (child2->index == EPS){
if (grandnextlabel == -1){
(*ptrAvailableLabels)++;
}
}
else {
//nxtlbl2 = *ptrAvailableLabels; //previous version
mylbl2 = *ptrAvailableLabels; //changed version
(*ptrAvailableLabels)++;
}
if (head->index == ELSEPART){
if (child2->index == EPS){
grndlbl1 = grandnextlabel;
}
else {
grndlbl1 = mylbl2;
}
}
nxtlbl2 = -1;
grndlbl2 = grandnextlabel;
dfsForSemanticAnalysis(child1,rht,afht,currentScope,globalScope,fname,NULL,headWhile,tailWhile, mylbl1, nxtlbl1, grndlbl1, ptrAvailableLabels, ptrAvailableTemporary, jumpIfTrue, jumpIfFalse, shouldOutputLabel, success, q, da , maxoffset, fp, ln);
if (child1->index == CONDITIONALSTMT || child1->index == ITERATIVESTMT){
shouldOutputLabel = 1;
}
dfsForSemanticAnalysis(child2,rht,afht,currentScope,globalScope,fname,NULL,headWhile,tailWhile, mylbl2, nxtlbl2, grndlbl2, ptrAvailableLabels, ptrAvailableTemporary, jumpIfTrue, jumpIfFalse, shouldOutputLabel, success, q, da , maxoffset, fp, ln);
//add instruction for generating label if otherstmts's 2nd child goes to eps and grandnextlabel = -1
if (head->index == OTHERSTMTS && child2->index == EPS && grandnextlabel == -1){
addEntryQuadruple(q,LABEL,-1,-1,-1,NULL,NULL,NULL,nxtlbl1);
//addEntryDynamicArray(nxtlbl1,da);
}
break;
}
case ASSIGNMENTSTMT:
{
ASTNode *child1 = head->child;
ASTNode *child2 = child1->next;
char *arg1 = (char *)malloc(sizeof(char) * 32);
char *arg2 = (char *)malloc(sizeof(char) * 32);
ASTNode *c1 = child1->child;
ASTNode *c2 = c1->next;
int opcode;