src/common/File.h

/***************************************************************************
 *                                                                         *
 *   Copyright (C) 2008 - 2012 Grigor Iliev, Benno Senoner                 *
 *                                                                         *
 *   This program is free software; you can redistribute it and/or modify  *
 *   it under the terms of the GNU General Public License as published by  *
 *   the Free Software Foundation; either version 2 of the License, or     *
 *   (at your option) any later version.                                   *
 *                                                                         *
 *   This program is distributed in the hope that it will be useful,       *
 *   but WITHOUT ANY WARRANTY; without even the implied warranty of        *
 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the         *
 *   GNU General Public License for more details.                          *
 *                                                                         *
 *   You should have received a copy of the GNU General Public License     *
 *   along with this program; if not, write to the Free Software           *
 *   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,                *
 *   MA  02110-1301  USA                                                   *
 ***************************************************************************/

#ifndef LS_FILE_H
#define LS_FILE_H

#include <memory>
#include <string>
#include <vector>

#include "Mutex.h"
#include <sys/stat.h>

namespace LinuxSampler {

#if __cplusplus >= 201103L
    typedef std::unique_ptr<std::vector<std::string>> FileListPtr;
#else
    typedef std::auto_ptr<std::vector<std::string> > FileListPtr;
#endif

    class File {
        public:
            class DirectoryWalker {
                public:
                    virtual void DirectoryEntry(std::string Path) = 0;
                    virtual void FileEntry(std::string Path) = 0;
            };
            
            File(std::string FileName);
            
            /**
             * Tests whether the file exists.
             */
            bool Exist();

            /**
             * Provides appropriate error message if failed to retrieve
             * information about the specified file, in which case Exist() returns false.
             */
            std::string GetErrorMsg();

            /**
             * Tests whether it's a regular file.
             */
            bool IsFile();

            /**
             * Tests whether it's a directory.
             */
            bool IsDirectory();
            
            /**
             * Returns the size of the file in bytes.
             */
            unsigned long GetSize();

            /**
             * Returns the names of the regular files in the specified directory.
             * @throws Exception If failed to list the directory content.
             */
            static FileListPtr GetFiles(std::string Dir);
            
            /**
             * Walks through the directory tree that is located under the
             * directory <b>Dir</b>, and calls <b>pWalker->DirectoryEntry()</b>
             * once for each directory in the tree and <b>pWalker->FileEntry()</b>
             * once for each file in the tree. Note that this method can be 
             * recursively invoked from within the callback functions
             * <b>pWalker->DirectoryEntry()</b> and <b>pWalker->FileEntry()</b>.
             * @throws Exception If the specified path is missing or is not a directory.
             * Exception is also thrown, and the directory tree walk is stopped,
             * if <b>pWalker->DirectoryEntry()</b> or <b>pWalker->FileEntry()</b>
             * throws Exception.
             */
            static void WalkDirectoryTree(std::string Dir, DirectoryWalker* pWalker);

            static const char DirSeparator;
            static const char PathSeparator;

        private:
            bool bExist;
            std::string ErrorMsg;
            static Mutex DirectoryWalkerMutex;
            static std::vector<DirectoryWalker*> DirectoryWalkers;
            static std::string DWErrorMsg;

            struct stat Status;
#ifdef WIN32
            static void WalkDirectoryTreeSub(std::string Dir, DirectoryWalker* pWalker);
#else
            static int FtwCallback(const char* fpath, const struct stat* sb, int typeflag);
#endif
    };
}

#endif
1	/***************************************************************************
2	* *
3	* Copyright (C) 2008 - 2012 Grigor Iliev, Benno Senoner *
4	* *
5	* This program is free software; you can redistribute it and/or modify *
6	* it under the terms of the GNU General Public License as published by *
7	* the Free Software Foundation; either version 2 of the License, or *
8	* (at your option) any later version. *
9	* *
10	* This program is distributed in the hope that it will be useful, *
11	* but WITHOUT ANY WARRANTY; without even the implied warranty of *
12	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
13	* GNU General Public License for more details. *
14	* *
15	* You should have received a copy of the GNU General Public License *
16	* along with this program; if not, write to the Free Software *
17	* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, *
18	* MA 02110-1301 USA *
19	***************************************************************************/
20
21	#ifndef LS_FILE_H
22	#define LS_FILE_H
23
24	#include <memory>
25	#include <string>
26	#include <vector>
27
28	#include "Mutex.h"
29	#include <sys/stat.h>
30
31	namespace LinuxSampler {
32
33	#if __cplusplus >= 201103L
34	typedef std::unique_ptr<std::vector<std::string>> FileListPtr;
35	#else
36	typedef std::auto_ptr<std::vector<std::string> > FileListPtr;
37	#endif
38
39	class File {
40	public:
41	class DirectoryWalker {
42	public:
43	virtual void DirectoryEntry(std::string Path) = 0;
44	virtual void FileEntry(std::string Path) = 0;
45	};
46
47	File(std::string FileName);
48
49	/**
50	* Tests whether the file exists.
51	*/
52	bool Exist();
53
54	/**
55	* Provides appropriate error message if failed to retrieve
56	* information about the specified file, in which case Exist() returns false.
57	*/
58	std::string GetErrorMsg();
59
60	/**
61	* Tests whether it's a regular file.
62	*/
63	bool IsFile();
64
65	/**
66	* Tests whether it's a directory.
67	*/
68	bool IsDirectory();
69
70	/**
71	* Returns the size of the file in bytes.
72	*/
73	unsigned long GetSize();
74
75	/**
76	* Returns the names of the regular files in the specified directory.
77	* @throws Exception If failed to list the directory content.
78	*/
79	static FileListPtr GetFiles(std::string Dir);
80
81	/**
82	* Walks through the directory tree that is located under the
83	* directory <b>Dir</b>, and calls <b>pWalker->DirectoryEntry()</b>
84	* once for each directory in the tree and <b>pWalker->FileEntry()</b>
85	* once for each file in the tree. Note that this method can be
86	* recursively invoked from within the callback functions
87	* <b>pWalker->DirectoryEntry()</b> and <b>pWalker->FileEntry()</b>.
88	* @throws Exception If the specified path is missing or is not a directory.
89	* Exception is also thrown, and the directory tree walk is stopped,
90	* if <b>pWalker->DirectoryEntry()</b> or <b>pWalker->FileEntry()</b>
91	* throws Exception.
92	*/
93	static void WalkDirectoryTree(std::string Dir, DirectoryWalker* pWalker);
94
95	static const char DirSeparator;
96	static const char PathSeparator;
97
98	private:
99	bool bExist;
100	std::string ErrorMsg;
101	static Mutex DirectoryWalkerMutex;
102	static std::vector<DirectoryWalker*> DirectoryWalkers;
103	static std::string DWErrorMsg;
104
105	struct stat Status;
106	#ifdef WIN32
107	static void WalkDirectoryTreeSub(std::string Dir, DirectoryWalker* pWalker);
108	#else
109	static int FtwCallback(const char* fpath, const struct stat* sb, int typeflag);
110	#endif
111	};
112	}
113
114	#endif