#include <stdlib.h>
#include <stdio.h>
#include "util.h"

/* Put the entire file content into the string str and the file size
   into *len.

   If errors occur, return non-zero; otherwise the return value is
   zero.
   
   Note that *str should be already allocated.

   Note that the length of the string str is actually 1+length, and
   the last character is the null character. */
unsigned char
read_entire_file(const char *file_name, char **str, NUM *len)
{
  long file_size = 0;

  FILE *file = fopen(file_name, "r");

  if (!file) {
    eprintf("%s:%d, Cannot open file \"%s\": ",
            __FILE__, __LINE__, file_name);
    perror(NULL);
    return 1;
  }

  fseek(file, 0, SEEK_END);
  file_size = ftell(file);
  fseek(file, 0, SEEK_SET);
  
  *len = 1+file_size;

  *str = realloc(*str, 1+file_size);
  
  if (*str == NULL) {
    fleprintf0("%s:%d, Cannot realloc\n");
    return 1;
  }

  fread(*str, sizeof(char), file_size, file);

  fclose(file);

  *(*str+file_size) = 0;

  return 0;
}