70 lines
2.4 KiB
C
70 lines
2.4 KiB
C
/***************************************************************************
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* file name : assembler.c *
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* author : *
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* description : This program will assemble a .ASM file into a .OBJ file *
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* This program will use the "asm_parser" library to achieve *
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* its functionality. *
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* *
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***************************************************************************
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*
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*/
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "asm_parser.h"
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int main(int argc, char **argv) {
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if (argc < 2) {
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printf("Usage: %s <assembly_file.asm>\n", argv[0]);
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return 1;
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}
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char *filename = argv[1]; // name of ASM file
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char program[ROWS][COLS]; // ASM file line-by-line
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char program_bin_str[ROWS][17]; // instructions converted to a binary string
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unsigned short int program_bin[ROWS]; // instructions in binary (HEX)
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int num_lines = read_asm_file(filename, program);
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if (num_lines != 0) {
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return num_lines; // Return error code from read_asm_file
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}
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int instr_count = 0;
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for (int i = 0; i < ROWS && program[i][0] != '\0'; i++) {
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char *line = program[i];
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char instr_bin_str[17] = {0};
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int ret = parse_instruction(line, instr_bin_str);
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if (ret == 0) {
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strcpy(program_bin_str[instr_count], instr_bin_str);
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unsigned short int bin = str_to_bin(instr_bin_str);
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if (bin == 6) { // Error code from str_to_bin
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printf("Error on line %d: %s\n", i + 1, line);
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return 6;
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}
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// if program_bin is full, return error
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if (instr_count >= ROWS) {
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printf("Error: Program too large\n");
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return 0;
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}
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program_bin[instr_count] = bin;
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instr_count++;
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} else {
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printf("Error on line %d: %s\n", i + 1, line);
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return ret;
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}
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// ret == 0 means successful parsing
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}
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// Write the object file
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char obj_filename[256];
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strcpy(obj_filename, filename);
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char *dot = strrchr(obj_filename, '.');
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if (dot != NULL) {
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strcpy(dot, ".obj");
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} else {
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strcat(obj_filename, ".obj");
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}
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int ret = write_obj_file(obj_filename, program_bin, instr_count);
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if (ret != 0) {
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return ret; // Return error code from write_obj_file
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}
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printf("Successfully assembled %s to %s\n", filename, obj_filename);
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return 0;
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} |