/* Functions for handling dependency tracking when reading .class files.

   Copyright (C) 1998, 1999, 2000, 2001, 2003, 2006, 2007
   Free Software Foundation, Inc.

This file is part of GCC.

GCC is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3, or (at your option)
any later version.

GCC is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with GCC; see the file COPYING3.  If not see
<http://www.gnu.org/licenses/>.  

Java and all Java-based marks are trademarks or registered trademarks
of Sun Microsystems, Inc. in the United States and other countries.
The Free Software Foundation is independent of Sun Microsystems, Inc.  */

/* Written by Tom Tromey <tromey@cygnus.com>, October 1998.  */

#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "mkdeps.h"

#include <assert.h>

#include "jcf.h"



/* The dependency structure used for this invocation.  */
struct deps *dependencies;

/* The output file, or NULL if we aren't doing dependency tracking.  */
static FILE *dep_out = NULL;

/* Nonzero if system files should be added.  */
static int system_files;

/* Nonzero if we are dumping out dummy dependencies.  */
static int print_dummies;



/* Call this to reset the dependency module.  This is required if
   multiple dependency files are being generated from a single tool
   invocation.  FIXME: we should change our API or just completely use
   the one in mkdeps.h.  */
void
jcf_dependency_reset (void)
{
  if (dep_out != NULL)
    {
      if (dep_out != stdout)
	fclose (dep_out);
      dep_out = NULL;
    }

  if (dependencies != NULL)
    {
      deps_free (dependencies);
      dependencies = NULL;
    }
}

void
jcf_dependency_set_target (const char *name)
{
  /* We just handle this the same as an `add_target'.  */
  if (dependencies != NULL && name != NULL)
    deps_add_target (dependencies, name, 1);
}

void
jcf_dependency_add_target (const char *name)
{
  if (dependencies != NULL)
    deps_add_target (dependencies, name, 1);
}

void
jcf_dependency_set_dep_file (const char *name)
{
  assert (dep_out != stdout);
  if (dep_out)
    fclose (dep_out);
  if (! strcmp (name, "-"))
    dep_out = stdout;
  else
    dep_out = fopen (name, "w");
}

void
jcf_dependency_add_file (const char *filename ATTRIBUTE_UNUSED, int system_p)
{
  if (! dependencies)
    return;

  /* Just omit system files.  */
  if (system_p && ! system_files)
    return;


  /* FIXME: Don't emit any dependencies.  In many cases we'll just see
     temporary files emitted by ecj... */
  /* deps_add_dep (dependencies, filename); */
}

void
jcf_dependency_init (int system_p)
{
  assert (! dependencies);
  system_files = system_p;
  dependencies = deps_init ();
}

void
jcf_dependency_print_dummies (void)
{
  print_dummies = 1;
}

void
jcf_dependency_write (void)
{
  if (! dep_out)
    return;

  assert (dependencies);

  deps_write (dependencies, dep_out, 72);
  if (print_dummies)
    deps_phony_targets (dependencies, dep_out);
  fflush (dep_out);
}