// natFileWin32.cc - Native part of File class.

/* Copyright (C) 1998, 1999, 2002, 2003  Red Hat, Inc.

   This file is part of libgcj.

This software is copyrighted work licensed under the terms of the
Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
details.  */

#include <config.h>

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

#include <windows.h>
#undef STRICT

#include <gcj/cni.h>
#include <jvm.h>
#include <java/io/File.h>
#include <java/io/IOException.h>
#include <java/util/Vector.h>
#include <java/lang/String.h>
#include <java/io/FilenameFilter.h>
#include <java/io/FileFilter.h>
#include <java/lang/System.h>

jboolean
java::io::File::_access (jint query)
{
  jstring canon = getCanonicalPath();
  if (! canon)
    return false;
  char *buf = (char *) __builtin_alloca (JvGetStringUTFLength (canon) + 1);
  jsize total = JvGetStringUTFRegion (canon, 0, canon->length(), buf);
  buf[total] = '\0';

  JvAssert (query == READ || query == WRITE || query == EXISTS);

  // FIXME: Is it possible to differentiate between existing and reading?
  // If the file exists but cannot be read because of the secuirty attributes
  // on an NTFS disk this wont work (it reports it can be read but cant)
  // Could we use something from the security API?
  DWORD attributes = GetFileAttributes (buf);
  if ((query == EXISTS) || (query == READ))
    return (attributes == 0xffffffff) ? false : true;
  else
    return ((attributes != 0xffffffff) && ((attributes & FILE_ATTRIBUTE_READONLY) == 0)) ? true : false;
}

jboolean
java::io::File::_stat (jint query)
{
  jstring canon = getCanonicalPath();
  if (! canon)
    return false;
  char *buf = (char *) __builtin_alloca (JvGetStringUTFLength (canon) + 1);
  jsize total = JvGetStringUTFRegion (canon, 0, canon->length(), buf);
  buf[total] = '\0';

  JvAssert (query == DIRECTORY || query == ISFILE);

  DWORD attributes = GetFileAttributes (buf);
  if (attributes == 0xffffffff)
    return false;

  if (query == DIRECTORY)
    return attributes & FILE_ATTRIBUTE_DIRECTORY ? true : false;
  else
    return attributes & FILE_ATTRIBUTE_DIRECTORY ? false : true;
}

jlong
java::io::File::attr (jint query)
{
  jstring canon = getCanonicalPath();
  if (! canon)
    return false;
  char *buf = (char *) __builtin_alloca (JvGetStringUTFLength (canon) + 1);
  jsize total = JvGetStringUTFRegion (canon, 0, canon->length(), buf);
  buf[total] = '\0';

  JvAssert (query == MODIFIED || query == LENGTH);

  WIN32_FIND_DATA info;
  HANDLE sHandle;
  if ( ( sHandle = FindFirstFile( buf, &info)) == INVALID_HANDLE_VALUE)
    return 0;
  
  FindClose( sHandle);
  
  if (query == LENGTH)
    return ((long long)info.nFileSizeHigh) << 32 | (unsigned long long)info.nFileSizeLow;
  else {
    // FIXME? This is somewhat compiler dependant (the LL constant suffix)
    // The file time as return by windows is the number of 100-nanosecond intervals since January 1, 1601
    return (((((long long)info.ftLastWriteTime.dwHighDateTime) << 32) | ((unsigned long long)info.ftLastWriteTime.dwLowDateTime)) - 116444736000000000LL) / 10000LL;
  }
}

jstring
java::io::File::getCanonicalPath (void)
{
  char *buf = (char *) __builtin_alloca (JvGetStringUTFLength (path) + 1);
  jsize total = JvGetStringUTFRegion (path, 0, path->length(), buf);
  buf[total] = '\0';

  LPTSTR unused;
  char buf2[MAX_PATH];
  if(!GetFullPathName(buf, MAX_PATH, buf2, &unused))
    throw new IOException (JvNewStringLatin1 ("GetFullPathName failed"));

  // FIXME: what encoding to assume for file names?  This affects many
  // calls.
  return JvNewStringUTF(buf2);
}

jboolean
java::io::File::isAbsolute (void)
{
  if (path->length() > 0
      && (path->charAt(0) == '/' || path->charAt(0) == '\\'))
    return true;
  if (path->length() < 3)
    return false;
  // Hard-code A-Za-z because Windows (I think) can't use non-ASCII
  // letters as drive names.
  if ((path->charAt(0) < 'a' || path->charAt(0) > 'z')
      && (path->charAt(0) < 'A' || path->charAt(0) > 'Z'))
    return false;
  return (path->charAt(1) == ':'
	  && (path->charAt(2) == '/' || path->charAt(2) == '\\'));
}

void java::io::File::init_native() { }


jobjectArray
java::io::File::performList (java::io::FilenameFilter *filter, 
			     java::io::FileFilter *fileFilter, 
			     java::lang::Class *clazz)
{
  jstring canon = getCanonicalPath();
  if (! canon)
    return NULL;
  char *buf = (char *) __builtin_alloca (JvGetStringUTFLength (canon) + 5);
  jsize total = JvGetStringUTFRegion (canon, 0, canon->length(), buf);
  if (buf[total-1] == '\\')
    strcpy (&buf[total], "*.*");
  else
    strcpy (&buf[total], "\\*.*");

  WIN32_FIND_DATA data;
  HANDLE handle = FindFirstFile (buf, &data);
  if (handle == INVALID_HANDLE_VALUE)
    return NULL;

  java::util::Vector *vec = new java::util::Vector ();

  do
    {
      if (strcmp (data.cFileName, ".") && strcmp (data.cFileName, ".."))
        {
          jstring name = JvNewStringUTF (data.cFileName);

          if (filter && !filter->accept(this, name))
	    continue;
          if (clazz == &java::io::File::class$)
	    {
              java::io::File *file = new java::io::File (this, name);
              if (fileFilter && !fileFilter->accept(file))
		continue;
	      vec->addElement (file);
	    }
	  else
	    vec->addElement (name);
        }
    }
  while (FindNextFile (handle, &data));

  if (GetLastError () != ERROR_NO_MORE_FILES)
    return NULL;

  FindClose (handle);

  jobjectArray ret = JvNewObjectArray (vec->size(), clazz, NULL);
  vec->copyInto (ret);
  return ret;
}


jboolean
java::io::File::performMkdir (void)
{
  char *buf = (char *) __builtin_alloca (JvGetStringUTFLength (path) + 1);
  jsize total = JvGetStringUTFRegion(path, 0, path->length(), buf);
  buf[total] = '\0';

  return (CreateDirectory(buf, NULL)) ? true : false;
}

jboolean
java::io::File::performRenameTo (File *dest)
{
  char *buf = (char *) __builtin_alloca (JvGetStringUTFLength (path) + 1);
  jsize total = JvGetStringUTFRegion(path, 0, path->length(), buf);
  buf[total] = '\0';
  char *buf2 = (char *) __builtin_alloca (JvGetStringUTFLength (dest->path)
					  + 1);
  total = JvGetStringUTFRegion(dest->path, 0, dest->path->length(), buf2);
  buf2[total] = '\0';

  return (MoveFile(buf, buf2)) ? true : false;
}

jboolean
java::io::File::performDelete ()
{
  jstring canon = getCanonicalPath();
  char *buf = (char *) __builtin_alloca (JvGetStringUTFLength (canon) + 1);
  jsize total = JvGetStringUTFRegion(canon, 0, canon->length(), buf);
  buf[total] = '\0';

  DWORD attributes = GetFileAttributes (buf);
  if (attributes == 0xffffffff)
    return false;

  if (attributes & FILE_ATTRIBUTE_DIRECTORY)
    return (RemoveDirectory (buf)) ? true : false;
  else
    return (DeleteFile (buf)) ? true : false;
}

jboolean java::io::File::performCreate (void) { JvFail("unimplemented\n"); }
jboolean java::io::File::performSetReadOnly() { JvFail("unimplemented"); }
jboolean java::io::File::performSetLastModified(jlong time) { JvFail("unimplemented"); }
JArray<java::io::File*>* java::io::File::performListRoots() { JvFail("unimplemented"); }