Detect direction of stack growth

From: Adam Warner (usenet_at_consulting.net.nz)
Date: 12/27/04 

Date: Mon, 27 Dec 2004 14:47:24 +1300

Hi all,

Is this a (C99) portable way to detect whether the C stack grows upwards
(1) or downwards (-1)?

#include <stdio.h>

int stack_direction=0;

void detect_stack_direction(void * stack_start) {
  void * stack_current;
  stack_direction=-1;
  if (&stack_start<&stack_current) stack_direction=1;
}

int main() {
  void * stack_start;
  detect_stack_direction(stack_start);

  printf("Stack grows: %i\n", stack_direction);
  return 0;
}

Thanks,
Adam

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