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

/* Copyright (C) 1998, 1999  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>

#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[MAX_PATH];
  jsize total = JvGetStringUTFRegion (canon, 0, canon->length(), buf);
  // FIXME?
  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[MAX_PATH];
  jsize total = JvGetStringUTFRegion (canon, 0, canon->length(), buf);
  // FIXME?
  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[MAX_PATH];
  jsize total = JvGetStringUTFRegion (canon, 0, canon->length(), buf);
  // FIXME?
  buf[total] = '\0';

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

  WIN32_FILE_ATTRIBUTE_DATA info;
  if (! GetFileAttributesEx(buf, GetFileExInfoStandard, &info))
    return 0;

  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[MAX_PATH], buf2[MAX_PATH];
  jsize total = JvGetStringUTFRegion (path, 0, path->length(), buf);
  // FIXME?
  buf[total] = '\0';

  LPTSTR unused;
  if(!GetFullPathName(buf, MAX_PATH, buf2, &unused))
    _Jv_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->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[MAX_PATH];
  jsize total = JvGetStringUTFRegion (canon, 0, canon->length(), buf);
  // FIXME?
  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 (name);

        }
    }
  while (FindNextFile (handle, &data));

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

  FindClose (handle);

  jobjectArray ret = JvNewObjectArray (vec->size(), canon->getClass(), NULL);
  vec->copyInto (ret);
  if (clazz == &java::io::File::class$) {
      jobject *ret_elements = elements(ret);
      for(int i=0; i<ret->length; i++)
          ret_elements[i] = new File((jstring)(ret_elements[i]));
  }
  return ret;
}


jboolean
java::io::File::performMkdir (void)
{
  char buf[MAX_PATH];
  jsize total = JvGetStringUTFRegion(path, 0, path->length(), buf);
  // FIXME?
  buf[total] = '\0';

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

jboolean
java::io::File::performRenameTo (File *dest)
{
  char buf[MAX_PATH];
  jsize total = JvGetStringUTFRegion(path, 0, path->length(), buf);
  // FIXME?
  buf[total] = '\0';
  char buf2[MAX_PATH];
  total = JvGetStringUTFRegion(dest->path, 0, dest->path->length(), buf2);
  // FIXME?
  buf2[total] = '\0';

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

jboolean
java::io::File::performDelete ()
{
  jstring canon = getCanonicalPath();
  char buf[MAX_PATH];
  jsize total = JvGetStringUTFRegion(canon, 0, canon->length(), buf);
  // FIXME?
  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"); }