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
|
#include <string>
#include <iostream>
#include <cstdlib>
#include <string.h>
#include <fstream>
#include <stdio.h>
using namespace std;
int main(int argc, char *argv[])
{
// If no extra file is provided then exit the program with error message
if (argc <= 1)
{
cout << "Correct Usage: " << argv[0] << " <Filename>" << endl;
exit (1);
}
// Array to hold the registers and initialize them all to zero
int registers [] = {0,0,0,0,0,0,0,0};
string memory [16000];
string Symtablelab[1000];
int Symtablepos[1000];
char line[100];
char label [9];
char opcode[9];
char arg1[256];
char arg2[256];
char* pch;
// Open the file that was input on the command line
ifstream myFile;
myFile.open(argv[1]);
if (!myFile.is_open())
{
cerr << "Cannot open the file." << endl;
}
int counter = 0;
int i = 0;
int j = 0;
while (myFile.good())
{
myFile.getline(line, 100, '\n');
// If the line begins with a #, then just get the next line
if (line[0] == '#')
{
continue;
}
// If there is a label, then this code will run
if ( line[0] != '\t' && line[0]!=' ')
{
if( pch = strtok(line," \t"))
{
strcpy(label,pch);
Symtablelab[i] = (string)label;
}
if (pch = strtok(NULL, " \t"))
{
strcpy(opcode,pch);
if (opcode != "WORDS" && opcode != "INT")
{
counter += 3;
}
else if (opcode == "INT")
counter ++;
}
if (pch = strtok(NULL, " \t,"))
{
strcpy(arg1,pch);
if (opcode == "WORDS")
{
int j = atoi(arg1);
counter += j;
}
}
if (pch = strtok(NULL, ","))
{
strcpy(arg2, pch);
}
Symtablepos[i] = counter;
}
if (line[0] == '\t' || line[0] == ' ')
{
if (pch = strtok(line, " \t"))
{
strcpy(opcode,pch);
if (opcode != "WORDS" && opcode != "INT")
{
counter += 3;
}
else if (opcode == "INT")
counter++;
}
if (pch = strtok(NULL, " \t,"))
{
strcpy(arg1,pch);
if (opcode == "WORDS")
{
j = atoi(arg1);
counter += j;
}
}
if (pch = strtok(NULL, ","))
{
strcpy(arg2,pch);
}
}
i++;
}
for (int x = 0; x <= i; x++)
{
cout << Symtablelab[i] << ' ' << Symtablepos[i] << endl;
}
return 0;
}
|
