-
Notifications
You must be signed in to change notification settings - Fork 0
/
eppcompiler.cpp
148 lines (135 loc) · 4.64 KB
/
eppcompiler.cpp
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
/* Do NOT add/remove any includes statements from this header file */
/* unless EXPLICTLY clarified on Piazza. */
// #include<iostream>
// using namespace std;
#include "eppcompiler.h"
//Write your code below this line
EPPCompiler::EPPCompiler(){
}
EPPCompiler::EPPCompiler(string out_file,int mem_limit){
// cout<<"compiler created..."<<endl;
for(int i = 0;i<mem_limit;i++){
least_mem_loc.push_heap(i);
}
memory_size = mem_limit;
output_file = out_file;
}
void EPPCompiler::compile(vector<vector<string>> code){
// cout<<"called to compile"<<endl;
vector<string> res;
for(int i = 0;i<int(code.size());i++){
targ.parse(code[i]);
// cout<<"Parse tree created"<<endl;
vector<string> temp = generate_targ_commands();
for(int j = 0;j<int(temp.size());j++){
res.push_back(temp[j]);
// cout<<temp[j];
}
}
// cout<<"Writing to file"<<endl;
write_to_file(res);
}
string convert_to_string(int a){
string res = "";
if(a == 0){
res = "0";return res;
}
while(a>=1){
char b = '0' + (a - (a/10)*10);
res = b + res ;
a/=10;
}
return res;
}
vector<string> EPPCompiler::generate_targ_commands(){
// cout<<"generate targ called"<<endl;
vector<string> res;
ExprTreeNode* root = targ.expr_trees[int(targ.expr_trees.size())-1];
if(root->left->type == "DEL"){
int address = targ.symtable->search(root->right->id);
targ.symtable->remove(root->right->id);
least_mem_loc.push_heap(address);
string ans = convert_to_string(address);
ans = "DEL = mem[" + ans + "]\n";
res.push_back(ans);
}
else{
ExprTreeNode* current = root->right;
vector<ExprTreeNode* > stk;
vector<ExprTreeNode* > p;
stk.push_back(current);
while(!stk.empty()){
current = stk[int(stk.size())-1];
stk.pop_back();
p.push_back(current);
if(current->right != NULL) stk.push_back(current->right);
if(current->left != NULL) stk.push_back(current->left);
}
while(!p.empty()){
current = p[int(p.size())-1];
if(current->type == "ADD"){
res.push_back("ADD\n");
// cout<<"assigned value "<<current->evaluated_value->get_frac_str()<<endl;
}
else if(current->type == "SUB"){
res.push_back("SUB\n");
// cout<<"assigned value "<<current->evaluated_value->get_frac_str()<<endl;
}
else if(current->type == "MUL"){
res.push_back("MUL\n");
// cout<<"assigned value "<<current->evaluated_value->get_frac_str()<<endl;
}
else if(current->type == "DIV"){
res.push_back("DIV\n");
// cout<<"assigned value "<<current->evaluated_value->get_frac_str()<<endl;
}
else if(current->type == "VAL"){
string ans = convert_to_string(current->num);
ans = "PUSH " + ans + "\n";
res.push_back(ans);
// cout<<"assigned value "<<current->evaluated_value->get_frac_str()<<endl;
}
else if(current->type == "VAR"){
string ans = convert_to_string(targ.symtable->search(current->id));
ans = "PUSH mem[" + ans + "]\n";
res.push_back(ans);
}
p.pop_back();
}
if(root->left->type == "RET"){
res.push_back("RET = POP\n");
}
else{// Casual
// cout<<"Hello mommy"<<root->left->id<<endl;
if(targ.symtable->search(root->left->id) == -1){
int address = least_mem_loc.get_min();
least_mem_loc.pop();
targ.symtable->assign_address(root->left->id,address);
string ans = convert_to_string(address);
ans = "mem[" + ans + "] = POP";
res.push_back(ans);
}
else{
string ans = convert_to_string(targ.symtable->search(root->left->id));
ans = "mem[" + ans + "] = POP";
res.push_back(ans);
}
}
}
res.push_back("\n");
return res;
}
void EPPCompiler::write_to_file(vector<string> commands) {
std::ofstream output(output_file);
if (output.is_open()) {
for (int i = 0; i < int(commands.size()); i++) {
output << commands[i];
}
output << endl;
output.close();
} else {
// cout << "Failed to open the output file." << endl;
}
}
EPPCompiler::~EPPCompiler(){
}