assembly_compiler/second_trans.c at main · barfeldman/assembly_compiler · GitHub

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
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "code_table.h"
#include "symbol_table.h"
#include "second_trans.h"
#include "first_trans.h"
#define MAX 81
#define A 4
#define R 2
#define E 1

int second_trans(char* am_file, symbol_table **symbol_list, code_table **code_list)
{
    code_table *temp = *code_list;
    symbol_table *symbol_temp;
    int error = 0;

    while (temp)
    {
        /* Edit the address of the empty label */
        if (is_bword_empty(temp->bword) && temp->dataORstring != 5)
        {
            symbol_temp = get_symbol(*symbol_list, temp->symbol);
            if (symbol_temp == NULL)
            {
                printf("ERROR: symbol do not exist\n");
                error = 1;
                return error;
            }

            /* Case the label has & to calculate the distance */
            if (temp->dataORstring == 3)
            {
                if (symbol_temp && symbol_temp->address != 0)
                {
                    edit_bword(symbol_temp->address - temp->address + 1, temp->bword, 3, 23);
                    edit_bword(A, temp->bword, 0, 2);
                }
            }
            /* Case is extern */
            else if (symbol_temp->address == 0)
            {
                edit_bword(E, temp->bword, 0, 23);
            }
            /* Edit the label address */
            else
            {
                /* Edit the label address */
                edit_bword(symbol_temp->address, temp->bword, 3, 23);
                /* Edit the R */
                edit_bword(R, temp->bword, 0, 2);
            }
        }
        temp = temp->Next;
    }
    return 0;
}