/*
  Name:    readfile2.c
  Purpose: Similar to readfile1.c, but now process the file line by line
  Author:  Bill Slough

  Bugs:
    1. Doesn't count lines correctly.  If an input line is too long, the
       character array is filled to capacity and the rest of the line
       is left for a subsequent read.

    2. Words which do fit in the character array are terminated with
       newlines.  This is a direct result of the way the fgets()
       function is designed.  Still, you may not want these newlines!

    3. fgets() returns NULL if one of two conditions exists:  either
       a read error occurs or we have reached the end of the stream.
       Here, we assume no read error occurs and don't check for it.
*/

#include <stdio.h>
#include <stdlib.h>
#include <string.h>

#define FILE_NAME "words"    /* name of the input file */
#define MAX_WORD_LENGTH 8

int main(void) {
    FILE *fp;          /* file pointer for an input stream */
    int charCount;     /* number of characters processed */
    int lineCount;     /* number of lines processed */
    
    char line[MAX_WORD_LENGTH + 1];  /* string to hold one line of input */

    /* 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);
    }

    /* process the file, line by line */
    charCount = 0;
    lineCount = 0;
    while (fgets(line, sizeof(line), fp) != NULL) {
        printf("Current line = \"%s\"\n", line);       
        charCount += strlen(line);       
        lineCount++;
    }
    printf("Characters processed = %d\n", charCount);
    printf("Lines processed = %d\n", lineCount);
    
    /* close the stream */
    fclose(fp);
    
    return 0;
}