fx_folder_posix.cpp

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// Copyright 2021 The PDFium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
 
// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
#include "core/fxcrt/fx_folder.h"
 
#include <memory>
 
#include "build/build_config.h"
#include "core/fxcrt/unowned_ptr.h"
#include "third_party/base/memory/ptr_util.h"
 
#if BUILDFLAG(IS_WIN)
#error "built on wrong platform"
#endif
 
#include <dirent.h>
#include <sys/stat.h>
#include <unistd.h>
 
class FX_PosixFolder : public FX_Folder {
 public:
  ~FX_PosixFolder() override;
 
  bool GetNextFile(ByteString* filename, bool* bFolder) override;
 
 private:
  friend class FX_Folder;
  FX_PosixFolder(const ByteString& path, DIR* dir);
 
  const ByteString m_Path;
  UnownedPtr<DIR> m_Dir;
};
 
std::unique_ptr<FX_Folder> FX_Folder::OpenFolder(const ByteString& path) {
  DIR* dir = opendir(path.c_str());
  if (!dir)
    return nullptr;
 
  // Private ctor.
  return pdfium::WrapUnique(new FX_PosixFolder(path, dir));
}
 
FX_PosixFolder::FX_PosixFolder(const ByteString& path, DIR* dir)
    : m_Path(path), m_Dir(dir) {}
 
FX_PosixFolder::~FX_PosixFolder() {
  closedir(m_Dir.ExtractAsDangling());
}
 
bool FX_PosixFolder::GetNextFile(ByteString* filename, bool* bFolder) {
  struct dirent* de = readdir(m_Dir);
  if (!de)
    return false;
 
  ByteString fullpath = m_Path + "/" + de->d_name;
  struct stat deStat;
  if (stat(fullpath.c_str(), &deStat) < 0)
    return false;
 
  *filename = de->d_name;
  *bFolder = S_ISDIR(deStat.st_mode);
  return true;
}