/*
  Name:    readfile.c
  Purpose: Read and store lines from an input file (w/ dynamic allocation)
  Author:  Bill Slough
*/

#include <stdio.h>
#include <stdlib.h>
#include "util.h"

#define FILE_NAME "words"     /* name of the input file */

int main(void) {
    FILE *fp;           /* file pointer for an input stream */
    char **lines;       /* NULL-terminated array of lines */
    int i;

    /* Try to open the input stream for reading */
    fp = fopen(FILE_NAME, "r");
    if (fp == NULL) {
        fprintf(stderr, "Error: can't open %s for reading.\n", FILE_NAME);
        exit(EXIT_FAILURE);
    }

    /* read and store all lines from the input file */
    lines = read_lines(fp);

    /* report the number of lines read and saved */
    display_lines(lines);
    display_lines_in_reverse(lines);
    printf("Number of lines in the file = %d\n", count_lines(lines));

    /* Free the space used for the lines */
    i = 0;
    while (lines[i] != NULL) {
        free(lines[i]);
        i++;
    }
    free(lines);

    /* Close the stream */
    fclose(fp);

    return 0;
}