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109 lines (88 loc) · 1.92 KB
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/*
* assembler.c
*
* Created on: Oct 3, 2011
* Author: nayef
*/
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#include "file_parser.h"
#include "hash_table.h"
int search(char *instruction);
// Array that holds the supported instructions
char *instructions[] = {
"la", // 0
"lui", // 1
"lw", // 2
"sw", // 3
"add", // 4
"sub", // 5
"addi", // 6
"or", // 7
"and", // 8
"ori", // 9
"andi", // 10
"slt", // 11
"slti", // 12
"sll", // 13
"srl", // 14
"beq", // 15
"j", // 16
"jr", // 17
"jal" // 18
};
// Size of array
size_t inst_len = sizeof(instructions)/sizeof(char *);
int search(char *instruction) {
int found = 0;
for (int i = 0; i < inst_len; i++) {
if (strcmp(instruction, instructions[i]) == 0) {
found = 1;
return i;
}
}
if (found == 0)
return -1;
}
// Quick Sort String Comparison Function
int string_comp(const void *a, const void *b) {
return strcmp(*(char **)a, *(char **)b);
}
int main (int argc, char *argv[]) {
// Make sure correct number of arguments input
if (argc != 3) {
printf("Incorrect number of arguments");
}
else {
// Open I/O files
// Check that files opened properly
FILE *In;
In = fopen(argv[1], "r");
if (In == NULL) {
printf("Input file could not be opened.");
exit(1);
}
FILE *Out;
Out = fopen(argv[2], "w");
if (Out == NULL) {
printf("Output file could not opened.");
exit(1);
}
// Sort the array using qsort for faster search
qsort(instructions, inst_len, sizeof(char *), string_comp);
// Create a hash table of size 127
hash_table_t *hash_table = create_hash_table(127);
// Parse in passes
int passNumber = 1;
parse_file(In, passNumber, instructions, inst_len, hash_table, Out);
// Rewind input file & start pass 2
rewind(In);
passNumber = 2;
parse_file(In, passNumber, instructions, inst_len, hash_table, Out);
// Close files
fclose(In);
fclose(Out);
return 0;
}
}