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Directory.cpp

Go to the documentation of this file.

#include "OSDependent/Directory.h"
#include "OSDependent/OS.h"

Directory::Directory(const char *name) :
_handle(INVALID_HANDLE_VALUE),
_hasFirst(false),
_isRewound(false)
{
        strcpy(_name,name);
}

Directory::~Directory()
{
  close();
}

int
Directory::open()
{
  if (_handle != INVALID_HANDLE_VALUE)
    return 0;
  char name[128];
  
  strcpy(name,_name);
  strcat(name,"\\*");

  WCHAR uniBuffer[512];
  MultiByteToWideChar(CP_ACP, MB_PRECOMPOSED, name, -1, uniBuffer, 512 );

  _handle = ::FindFirstFile(uniBuffer, &_data);
        if (_handle == INVALID_HANDLE_VALUE)
    return -1;
  _hasFirst = true;
  _isRewound = false;
  return 0;
}

int
Directory::close()
{
  if (_handle == INVALID_HANDLE_VALUE)
    return 0;
  if (::FindClose(_handle) == 0)
    return -1;
  _handle = INVALID_HANDLE_VALUE;
  return 0;
}

int
Directory::rewind()
{
        if (_handle == INVALID_HANDLE_VALUE)
    return -1;
        if (close() < 0)
    return -1;
  _isRewound = true;
  return 0;
}

DirectoryEntry *
Directory::read()
{
  static DirectoryEntry entry;
  if (_isRewound) {
    if (open() < 0)
      return NULL;
  }
        if (_handle == INVALID_HANDLE_VALUE)
    return NULL;
  if (_hasFirst) {
    _hasFirst = false;
  } else if (::FindNextFile(_handle, &_data) == 0) {
    if (::GetLastError() == ERROR_NO_MORE_FILES) {
                        return NULL;    // end of entries
                } else {
      entry.name = NULL;
                        return &entry;  // error
                }
        }

        char params[256];
        WideCharToMultiByte(CP_ACP, 0, _data.cFileName, -1,  params, 256, 0, 0);

    entry.name  = OS::strdup(params);
        entry.size  = _data.nFileSizeLow;
  // TODO: fix
        entry.atime = 0; //_data.ftLastAccessTime;
        entry.ctime = 0; //_data.ftCreationTime;
        entry.mtime = 0; //_data.ftLastWriteTime;
        return &entry;
}

int
Directory::seek(int pos)
{
  if (_isRewound) {
    if (open() < 0)
      return -1;
  }
        if (_handle == INVALID_HANDLE_VALUE)
    return -1;
  for (int i = 0; i < pos; i++) {
    if (::FindNextFile(_handle, &_data) == 0)
      return -1;
  }
        return 0;
}

const char *
Directory::name() const
{
  return _name;
}

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