/**
 * As with reader2, but breaking up and doing a double read of the file
 * so that the memory used to store the text is exactly the size of the
 * text itself.
 * 
 * @author gtowell
 * Created March 2021
 * 
 * **/

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


/** 
 * Count the numer of lines in the named file
 * @param the file to be counted
 * @return the numer of tlines in the line
 * **/
int linecounter(char* filename)
{
    FILE* f = fopen(filename, "r");
    char line[256];
    int linecount=0;
    while (fgets(line, 256, f)) {
	    linecount++;
    }
    fclose(f);
    return linecount;
}
/**
 * Read the file and return a pointer to the 2d array
 * @param filename -- the name of the file to be read
 * @param linecount -- the number of lines in the file
 * @return a pointer to the read in information
 * **/
char** readfile(char* filename, int linecount)
{
    char** rtn = malloc(linecount * sizeof(char*));
    int lc=0;
    FILE* f = fopen(filename, "r");
    char line[256];
    while (fgets(line, 256, f)) {
    	int llen = strlen(line);
	    char* nline = malloc((llen+1)*sizeof(char));
	    strcpy(nline, line);
	    rtn[lc++]=nline;
    }
    fclose(f);
    return rtn;
}

int main(int argc, char* argv[])
{

    FILE* f = fopen(argv[1], "r");
    if (!f) {
	    fprintf(stderr, "No such file\n");
	    return 1;
    }
    fclose(f);

    int linecount = linecounter(argv[1]);
    char** text = readfile(argv[1], linecount);
    for (int i=0; i<linecount; i++)
	    printf(text[i]);

    // free up all of the memory
    for (int i=0; i<linecount; i++)
	    free(text[i]);
    free(text);
    
    //close the open file descriptors
    fclose(stdin);
    fclose(stdout);
    fclose(stderr);
}