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


#define MAX_STRING_LENGTH 256


void ReadStrings(char **strings, int *nstrings, int maxstrings, FILE *fp)
{
  char string[MAX_STRING_LENGTH];

  *nstrings = 0;
  while (fgets(string, MAX_STRING_LENGTH, fp)) {
    strings[(*nstrings)++] = strdup(string);
    if (*nstrings >= maxstrings) break;
  } 
}


void WriteStrings(char **strings, int nstrings, FILE *fp)
{
  int i;

  for (i = 0; i < nstrings; i++)
    fprintf(fp, "%s", strings[i]);
}


void SortStrings(char **strings, int nstrings, int (*compare)(char *string1, char *string2))
{
  int i, j;

  for (i = 0; i < nstrings; i++) {
    for (j = i+1; j < nstrings; j++) {
      if ((*compare)(strings[i], strings[j]) > 0) { 
        char *swap = strings[i];
        strings[i] = strings[j];
        strings[j] = swap;
      }
    }
  }
}