fileprocess.c

#include "fileprocess.h"
#include "lineprocess.h"

int _courrent_line_number = 0;

bool _error_flag = false;

extern int get_instructions_memory_amount();

extern int get_data_memory_amount();

extern void reset_memory_counters();

extern void reset_symbol_list();

extern void reset_output_list();

extern void reset_external_list();

extern void create_output_files(char * filename);

bool is_empty(char line[]);

void reset_all();

char * get_filename_prefix(char *);

void process_file(char *filename)
{
	FILE *file;
    char line[MAX_LINE_INPUT];
    int ic_mem_cells, dc_mem_cells;
    char * filenameprefix;

    /* is valid file */
	if((file = fopen(filename, "r"))) {
		/* read each line */
		while(fgets(line, MAX_LINE_INPUT, file)) {
			/* line counter */
			_courrent_line_number++;
			/* skips comment and empty lines */
			if(!is_empty(line)) {
				first_loop_process(line);
			}
		}

		/* reset line counter */
		_courrent_line_number = 0;

		/* save memory cells */
		ic_mem_cells = get_instructions_memory_amount();
		dc_mem_cells = get_data_memory_amount();
		set_saved_memory_cells(ic_mem_cells, dc_mem_cells);

		/* update data symbols adresses after instructions */
		update_data_symbols_addresses();
		/* reset ic and dc counters */
		reset_counters();

		rewind(file);

		/* read each line */
		while(fgets(line, MAX_LINE_INPUT, file)) {
			/* line counter */
			_courrent_line_number++;
			/* skips comment and empty lines */
			if(!is_empty(line)) {
				second_loop_process(line);
			}
		}
		/* stops action on error */
		if (_error_flag) {
			printf("found some erros, cannot create files, please fix and run agian. \n");
			return;
		}

		filenameprefix = get_filename_prefix(filename);
		create_output_files(filenameprefix);
		/* reset all global variables fro the next file */
		reset_all();
		/* free allocated space */
		filenameprefix = NULL;
		filename = NULL;
		free(filenameprefix);
		free(filename);
	} else {
		printf("%s does not exist...\n", filename);
	}
}

bool is_empty(char line[])
{
	unsigned i = 0;
	bool isEmpty = true;

	while(line[i]) {
		/* checks if char is empty (whitespace, tab, new line...)*/
		if(!isspace(line[i])) {
			/* if first character is a comment sign */
			if(line[i] == COMMENT_SIGN) {
				return true;
			}
			isEmpty = false;
			break;
		}
		i++;
	}
	return isEmpty;
}

int get_file_line()
{
	return _courrent_line_number;
}

void set_error_mode()
{
	_error_flag = true;
}

void reset_all()
{
	_courrent_line_number = 0;
	_error_flag = false;
	reset_counters();
	reset_memory_counters();
	reset_symbol_list();
	reset_output_list();
	reset_external_list();
}

char * get_filename_prefix(char * filename)
{
	int i = 0;
	char * newFileName;
	while(filename[i] && filename[i] != '.') {
		i++;
	}
	i = 0;
	newFileName = (char *) malloc(i+1 * sizeof(char));
	while(filename[i] && filename[i] != '.') {
		newFileName[i] = filename[i];
		i++;
	}
	return newFileName;
}