UNIX for Advanced & Expert Users

char * foobar = "foo\0bar\0example\0";
printf ("%s\n", foobar); /* this would print foo */
printf ("%s\n", foobar+4); /* this would print bar */
/* pointer arithmetics... */

#include <stdio.h>


main (int argc, char *argv[])
{
  FILE *fp;
  char *tok;
  int x = 1;
                  
  long  lFileLen;               /* Length of file */
  char *contents;                  /* Dynamically allocated buffer (entire file) */

  if (argc < 2) {
     printf("need a filename\n");
     exit(1);
  }

  fp = fopen(argv[1], "r"); /* Open in BINARY mode */
  if (fp == NULL) {
      printf("could not open file\n");
      exit(2);
  }

  fseek(fp, 0L, SEEK_END);  /* Position to end of file */
  lFileLen = ftell(fp);     /* Get file length */
  rewind(fp);               /* Back to start of file */

  printf("file length is: %ld\n", lFileLen);
 
  lFileLen = 200; /* assume there are 200 bytes at most */
  
  contents = (char*)calloc(lFileLen + 1, sizeof(char));

  if(contents == NULL )
  {
    printf("\nInsufficient memory to read file.\n");
    return 0;
  }

  /* Read the entire file into contents */
  fread(contents, lFileLen, 1, fp); 
  
  fclose(fp);

  printf("content is [%s]\n", contents);  /* nothing after first null character !!! */
  printf("strlen: %d\n", strlen(contents)); 
  
   /* extract first string from string sequence */
  tok = (char*)strtok(contents, "\0");

  /* print first string after tokenized */
  printf("%i: %s\n", x, tok);

  /* loop until finishied */
  while (1) 
  { 
          /* extract string from string sequence */
          tok = (char*)strtok(NULL, "\0");

          /* check if there is nothing else to extract */
          if (tok == NULL)
          {
                  printf("Tokenizing complete\n");
               /*   exit(0); */
                  break;
          } 

          /* print string after tokenized */
          printf("/%i: %s\n", x, tok);
          x++;
  } 


  free(contents);

}