%%	options

copyright owner	=	Dirk Krause
copyright year	=	2015-xxxx
SPDX-License-Identifier:	BSD-3-Clause


%%	header

/**	@file
	Compare unique file identifiers.
*/

#ifndef	DK4CONF_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include "dk4conf.h"
#else
#include <dktools-4/dk4conf.h>
#endif
#endif

#ifndef DK4UFIT_H_INCLUDED
#if DK4_BUILDING_DKTOOLS4
#include <libdk4c/dk4ufit.h>
#else
#include <dktools-4/dk4ufit.h>
#endif
#endif

#ifdef __cplusplus
extern "C" {
#endif

/**	Compare two unique file identifiers.
	@param	l	Left identifier.
	@param	r	Right identifier.
	@return	1 if l>r, 0 if l=r, -1 if l<r.
*/
int
dk4ufi_compare(const dk4_ufi_t *l, const dk4_ufi_t *r);

#ifdef __cplusplus
}
#endif


%%	module

#include "dk4conf.h"
#include <libdk4c/dk4ufic.h>



$!trace-include



int
dk4ufi_compare(const dk4_ufi_t *l, const dk4_ufi_t *r)
{
  int back = 0;
  $? "+ dk4ufi_compare"
  if (NULL != l) {
    if (NULL != r) {
#if DK4_ON_WINDOWS
      if (l->ser > r->ser) {
        back = 1;
      } else {
        if (l->ser < r->ser) {
	  back = -1;
	}
      }
      if (0 == back) {
        if (l->inh > r->inh) {
	  back = 1;
	} else {
	  if (l->inh < r->inh) {
	    back = -1;
	  }
	}
      }
      if (0 == back) {
        if (l->inl > r->inl) {
	  back = 1;
	} else {
	  if (l->inl < r->inl) {
	    back = -1;
	  }
	}
      }
#else
      if (l->dev > r->dev) {
        back = 1;		$? ". left dev larger"
      } else {
        if (l->dev < r->dev) {
	  back = -1;		$? ". right dev larger"
	}
      }
      if (0 == back) {
        if (l->ino > r->ino) {
	  back = 1;		$? ". left ino larger"
	} else {
	  if (l->ino < r->ino) {
	    back = -1;		$? ". right ino larger"
	  }
	}
      }
      $? ". %lu/%lu   %lu/%lu", (unsigned long)(l->dev), (unsigned long)(l->ino), (unsigned long)(r->dev), (unsigned long)(r->ino)
#endif
    } else {
      back = 1;
    }
  } else {
    if (NULL != r) {
      back = -1;
    }
  }
  $? "- dk4ufi_compare %d", back
  return back;
}