void
c_open(char *file, char **argv) {
	if(argv[1] == NULL) { puts("usage: O filename"); return;}
	FILE *f = fopen(argv[1], "r");
	if(f == NULL) { puts("couldnt open file."); return; }
	b_truncate(buffer);
	Row *row = buffer;
	while (1) {
		size_t red = 0;
		for (int i = 0; i < ROW_SIZE; i++) {
			red = fread(&row->text[i], 1, 1, f);
			if (red != 1) return;
			if (row->text[i] == '\n') {
				row->text[i] = 0;
				break;
			}
		}
		row = b_insert(row);
	}
	fclose(f);
}

void
c_save(char *file, char **argv) {
        FILE *f = fopen(file + 2, "w");
        if(f == NULL) { puts("couldnt open file."); return; }
        Row *row = buffer;
        while (1) {
                for(int i = 0; i < ROW_SIZE; i++) {
                        if (row->text[i] == '\0' || row->text[i] == '\n')
                                break;
                        fwrite(&row->text[i], 1, 1, f);
                }
                fwrite("\n", 1, 1, f);
                if (row->n == NULL) break;
                row = row->n;
        }
}