/* Deletes each character in string s1 that matches any character in
 * string s2. This program performs the same function as "squeeze,"
 * but it uses a different technique to do the checking. It took me
 * way too long to write this fucksticker!
 */

#define MAXLEN 50 /* Maximum allowable string length */

#include <stdio.h>

void squeeze(char str1[], char str2[]);

int main() {
     char c, str1[MAXLEN], str2[MAXLEN];
     int i = 0;

     /* I should write this part as a function... but fuck it */
     printf("Please enter a string: ");
     while ((c = getchar()) != '\n') {
	  if (c == EOF) {
	       printf("\nOh, so you don't wanna play anymore?\n");
	       exit(0);
	  } else if (i == MAXLEN) {
	       printf("\nToo much input! AIEEEEE!\n");
	       exit(0);
	  } else
	       str1[i++] = c;
     }
     str1[i] = '\0';

     i = 0;
     printf("Please enter another string: ");
     while ((c = getchar()) != '\n') {
	  if (c == EOF) {
	       printf("\nRunning away, eh?\n");
	       exit(0);
	  } else if (i == MAXLEN) {
	       printf("\nNo, NO, NOOOOOO!!!!!!");
	       exit(0);
	  } else
	       str2[i++] = c;
     }
     str2[i] = '\0';

     squeeze(str1, str2);

     printf("\nAll the characters in the second string have ");
     printf("\nbeen removed from the first. The result: ");
     printf("\n%s\n", str1);
     printf("\nHave a nice day... FAG!\n");

     return 0;
}
	       
void squeeze(char str1[], char str2[]) {
     int i, j, k, match;
     
     match = 0;
     k = 1;
     for (i = 0; str1[i] != '\0';) {
	  for (j = 0; str2[j] != '\0'; j++) {
	       if (str1[i] == str2[j]) {
		    match = 1;
		    break;
	       }
	  }

	  /* on the one hand, it's a kludge.
	   * on the other, it was hard to code,
	   * it's kinda hard to understand,
	   * and i'm rather impressed that i
	   * was able to create the sonofabitch.
	   */
	  if (match) {
	       str1[i] = str1[k++];
	       match = 0;
	  } else {
	       str1[++i] = str1[k++];
	  }
     }
}

/* don't let the segfault hit you in the ass on the way out ;) */