Twilight Zone

strange strtoll

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

int main(int argc, char **argv)
{
  size_t llsize = sizeof(long long);
  printf("Size of long long is %llu\n", llsize );

  const char * testuintmax = "2147483647";
  char * oobll = "1234567890123456789012345678901234567890";
  int vi = atoi(testuintmax);

  printf("With atoi errno=%d value=%d\n",errno,vi);

  long long vll1 = strtoll(testuintmax,NULL,10);
  printf("With strtoll errno=%d value=%li\n",errno,vll1);

  char * oobll_end;
  long vll2 = strtol(oobll,&oobll_end,10);
  printf("With strtol errno=%d value=%ld\n",errno,vll2);
  errno=0;

  long long vll3 = strtoll(testuintmax,NULL,10);
  printf("With strtoll errno=%d value=%li\n",errno,vll3);

  return 0;
}