MPD  0.20.15
DirectoryReader.hxx
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19 
20 #ifndef MPD_FS_DIRECTORY_READER_HXX
21 #define MPD_FS_DIRECTORY_READER_HXX
22 
23 #include "check.h"
24 #include "Path.hxx"
25 
26 #ifdef _WIN32
27 
28 #include <windows.h>
29 #include <tchar.h>
30 
34 class DirectoryReader {
35  const HANDLE handle;
36  WIN32_FIND_DATA data;
37  bool first = true;
38 
39  class MakeWildcardPath {
41 
42  public:
43  MakeWildcardPath(PathTraitsFS::const_pointer_type _path) {
44  auto l = _tcslen(_path);
45  path = new PathTraitsFS::value_type[l + 3];
46  _tcscpy(path, _path);
47  path[l] = _T('\\');
48  path[l + 1] = _T('*');
49  path[l + 2] = 0;
50  }
51 
52  ~MakeWildcardPath() {
53  delete[] path;
54  }
55 
56  operator PathTraitsFS::const_pointer_type() const {
57  return path;
58  }
59  };
60 
61 public:
67  explicit DirectoryReader(Path dir);
68 
69  DirectoryReader(const DirectoryReader &other) = delete;
70  DirectoryReader &operator=(const DirectoryReader &other) = delete;
71 
76  FindClose(handle);
77  }
78 
82  bool ReadEntry() {
83  if (first) {
84  first = false;
85  return true;
86  }
87 
88  return FindNextFile(handle, &data) != 0;
89  }
90 
94  Path GetEntry() const {
95  return Path::FromFS(data.cFileName);
96  }
97 };
98 
99 #else
100 
101 #include <dirent.h>
102 
107  DIR *const dirp;
108  dirent *ent = nullptr;
109 
110 public:
116  explicit DirectoryReader(Path dir);
117 
118  DirectoryReader(const DirectoryReader &other) = delete;
119  DirectoryReader &operator=(const DirectoryReader &other) = delete;
120 
125  closedir(dirp);
126  }
127 
131  bool HasEntry() const {
132  return ent != nullptr;
133  }
134 
138  bool ReadEntry() {
139  ent = readdir(dirp);
140  return HasEntry();
141  }
142 
146  Path GetEntry() const {
147  assert(HasEntry());
148  return Path::FromFS(ent->d_name);
149  }
150 };
151 
152 #endif
153 
154 #endif
Path GetEntry() const
Extracts directory entry that was previously read by ReadEntry.
bool HasEntry() const
Checks if directory entry is available.
bool ReadEntry()
Reads next directory entry.
Pointer::pointer_type pointer_type
Definition: Traits.hxx:55
static constexpr Path FromFS(const_pointer_type fs)
Create a new instance pointing to the specified path string.
Definition: Path.hxx:64
DirectoryReader & operator=(const DirectoryReader &other)=delete
Pointer::const_pointer_type const_pointer_type
Definition: Traits.hxx:56
A path name in the native file system character set.
Definition: Path.hxx:39
Reader for directory entries.
~DirectoryReader()
Destroys this instance.
DirectoryReader(Path dir)
Creates new directory reader for the specified #dir.
char_traits::char_type value_type
Definition: Traits.hxx:53