src/common/File.cpp

/***************************************************************************
 *                                                                         *
 *   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                                                   *
 ***************************************************************************/

#include "File.h"

#include <cstring>
#include <errno.h>
#include <sstream>
#include <sys/stat.h>
#include <dirent.h>

#include "Exception.h"
#include "Path.h"
#include "global_private.h"

#if WIN32
#include <windows.h>
#else
#include <ftw.h>
#endif

namespace LinuxSampler {
#ifdef WIN32
    const char File::DirSeparator = '\\';
    const char File::PathSeparator = ';';
#else
    const char File::DirSeparator = '/';
    const char File::PathSeparator = ':';
#endif
    Mutex File::DirectoryWalkerMutex;
    std::vector<File::DirectoryWalker*> File::DirectoryWalkers;
    std::string File::DWErrorMsg;

    File::File(const Path& path) {
        bExist = !stat(path.toNativeFSPath().c_str(), &Status);
        if (!bExist) ErrorMsg = strerror(errno);
    }

    File::File(std::string Path) {
            bExist = !stat(Path.c_str(), &Status);
            if(!bExist) ErrorMsg = strerror(errno);
    }
    
    bool File::Exist() {
        return bExist;
    }
    
    std::string File::GetErrorMsg() {
        return ErrorMsg;
    }
    
    bool File::IsFile() {
        if(!Exist()) return false;
        
            return S_ISREG(Status.st_mode);
    }
    
    bool File::IsDirectory() {
        if(!Exist()) return false;
        
            return S_ISDIR(Status.st_mode);
    }
    
    unsigned long File::GetSize() {
        if(!Exist()) return 0;
        
            return Status.st_size;      
    }
    
    FileListPtr File::GetFiles(std::string Dir) {
            DIR* pDir = opendir(Dir.c_str());
            if (pDir == NULL) {
                std::stringstream ss;
                ss << "Failed to list the directory content of `";
                ss << Dir << "`: " << strerror(errno);
                throw Exception(ss.str());
            }
            
            FileListPtr fileList(new std::vector<std::string>);
            
            struct dirent* pEnt = readdir(pDir);
            while (pEnt != NULL) {
#ifdef _DIRENT_HAVE_D_TYPE
            if (pEnt->d_type == DT_REG) {
                fileList->push_back(std::string(pEnt->d_name));
            }
#else
            struct stat s;
            if (stat((Dir + DirSeparator + pEnt->d_name).c_str(), &s) == 0 && S_ISREG(s.st_mode)) {
                fileList->push_back(std::string(pEnt->d_name));
            }
#endif
                pEnt = readdir(pDir);
            }
            
            if (closedir(pDir)) {
                std::stringstream ss;
                ss << "Failed to close directory `" << Dir << "`: ";
                ss << strerror(errno);
                throw Exception(ss.str());
            }
            
            return fileList;
    }
    
    void File::WalkDirectoryTree(std::string Dir, DirectoryWalker* pWalker) {
        dmsg(2,("File: WalkDirectoryTree(Dir=%s)\n", Dir.c_str()));
        File f = File(Dir);
        if(!f.Exist()) throw Exception("Fail to stat `" + Dir + "`: " + f.GetErrorMsg());
        if(!f.IsDirectory()) throw Exception("The specified path is not a directory: " + Dir);
#ifdef WIN32
        WalkDirectoryTreeSub(Dir, pWalker);
#else
        DirectoryWalkerMutex.Lock();
        DirectoryWalkers.push_back(pWalker);
        DWErrorMsg = "Failed to process directory tree: " + Dir;
        
            if (ftw(Dir.c_str(), FtwCallback, 10)) {
                DirectoryWalkers.pop_back();
                if (DirectoryWalkers.size() == 0) DirectoryWalkerMutex.Unlock();
                throw Exception(DWErrorMsg);
            }
        DirectoryWalkers.pop_back();
        if (DirectoryWalkers.size() == 0) DirectoryWalkerMutex.Unlock();
#endif
    }

#ifdef WIN32
    void File::WalkDirectoryTreeSub(String Dir, DirectoryWalker* pWalker) {
        dmsg(2,("File: WalkDirectoryTreeSub(Dir=%s)\n", Dir.c_str()));
        DWORD attrs = GetFileAttributes(Dir.c_str());
        if (attrs == INVALID_FILE_ATTRIBUTES) return;

        if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
            pWalker->DirectoryEntry(Dir);

            std::string::size_type l = Dir.length() - 1;
            if (Dir[l] == '/') Dir[l] = '\\';
            else if (Dir[l] != '\\') Dir += '\\';

            WIN32_FIND_DATA fd;
            HANDLE h = FindFirstFile((Dir + "*").c_str(), &fd);
            if (h == INVALID_HANDLE_VALUE) return;
            do {
                if (strcmp(fd.cFileName, ".") != 0 &&
                    strcmp(fd.cFileName, "..") != 0) {
                    WalkDirectoryTreeSub(Dir + fd.cFileName, pWalker);
                }
            } while (FindNextFile(h, &fd));
            FindClose(h);
        } else {
            pWalker->FileEntry(Dir);
        }
    }
#else
    int File::FtwCallback(const char* fpath, const struct stat* sb, int typeflag) {
        dmsg(2,("File: FtwCallback(fpath=%s)\n", fpath));
        try {
            if (typeflag == FTW_D) DirectoryWalkers.back()->DirectoryEntry(std::string(fpath));
            else if (typeflag == FTW_F) DirectoryWalkers.back()->FileEntry(std::string(fpath));
        } catch(Exception e) {
            e.PrintMessage();
            DWErrorMsg = e.Message();
            return -1;
        }
        
        return 0;
    }
#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	#include "File.h"
22
23	#include <cstring>
24	#include <errno.h>
25	#include <sstream>
26	#include <sys/stat.h>
27	#include <dirent.h>
28
29	#include "Exception.h"
30	#include "Path.h"
31	#include "global_private.h"
32
33	#if WIN32
34	#include <windows.h>
35	#else
36	#include <ftw.h>
37	#endif
38
39	namespace LinuxSampler {
40	#ifdef WIN32
41	const char File::DirSeparator = '\\';
42	const char File::PathSeparator = ';';
43	#else
44	const char File::DirSeparator = '/';
45	const char File::PathSeparator = ':';
46	#endif
47	Mutex File::DirectoryWalkerMutex;
48	std::vector<File::DirectoryWalker*> File::DirectoryWalkers;
49	std::string File::DWErrorMsg;
50
51	File::File(const Path& path) {
52	bExist = !stat(path.toNativeFSPath().c_str(), &Status);
53	if (!bExist) ErrorMsg = strerror(errno);
54	}
55
56	File::File(std::string Path) {
57	bExist = !stat(Path.c_str(), &Status);
58	if(!bExist) ErrorMsg = strerror(errno);
59	}
60
61	bool File::Exist() {
62	return bExist;
63	}
64
65	std::string File::GetErrorMsg() {
66	return ErrorMsg;
67	}
68
69	bool File::IsFile() {
70	if(!Exist()) return false;
71
72	return S_ISREG(Status.st_mode);
73	}
74
75	bool File::IsDirectory() {
76	if(!Exist()) return false;
77
78	return S_ISDIR(Status.st_mode);
79	}
80
81	unsigned long File::GetSize() {
82	if(!Exist()) return 0;
83
84	return Status.st_size;
85	}
86
87	FileListPtr File::GetFiles(std::string Dir) {
88	DIR* pDir = opendir(Dir.c_str());
89	if (pDir == NULL) {
90	std::stringstream ss;
91	ss << "Failed to list the directory content of `";
92	ss << Dir << "`: " << strerror(errno);
93	throw Exception(ss.str());
94	}
95
96	FileListPtr fileList(new std::vector<std::string>);
97
98	struct dirent* pEnt = readdir(pDir);
99	while (pEnt != NULL) {
100	#ifdef _DIRENT_HAVE_D_TYPE
101	if (pEnt->d_type == DT_REG) {
102	fileList->push_back(std::string(pEnt->d_name));
103	}
104	#else
105	struct stat s;
106	if (stat((Dir + DirSeparator + pEnt->d_name).c_str(), &s) == 0 && S_ISREG(s.st_mode)) {
107	fileList->push_back(std::string(pEnt->d_name));
108	}
109	#endif
110	pEnt = readdir(pDir);
111	}
112
113	if (closedir(pDir)) {
114	std::stringstream ss;
115	ss << "Failed to close directory `" << Dir << "`: ";
116	ss << strerror(errno);
117	throw Exception(ss.str());
118	}
119
120	return fileList;
121	}
122
123	void File::WalkDirectoryTree(std::string Dir, DirectoryWalker* pWalker) {
124	dmsg(2,("File: WalkDirectoryTree(Dir=%s)\n", Dir.c_str()));
125	File f = File(Dir);
126	if(!f.Exist()) throw Exception("Fail to stat `" + Dir + "`: " + f.GetErrorMsg());
127	if(!f.IsDirectory()) throw Exception("The specified path is not a directory: " + Dir);
128	#ifdef WIN32
129	WalkDirectoryTreeSub(Dir, pWalker);
130	#else
131	DirectoryWalkerMutex.Lock();
132	DirectoryWalkers.push_back(pWalker);
133	DWErrorMsg = "Failed to process directory tree: " + Dir;
134
135	if (ftw(Dir.c_str(), FtwCallback, 10)) {
136	DirectoryWalkers.pop_back();
137	if (DirectoryWalkers.size() == 0) DirectoryWalkerMutex.Unlock();
138	throw Exception(DWErrorMsg);
139	}
140	DirectoryWalkers.pop_back();
141	if (DirectoryWalkers.size() == 0) DirectoryWalkerMutex.Unlock();
142	#endif
143	}
144
145	#ifdef WIN32
146	void File::WalkDirectoryTreeSub(String Dir, DirectoryWalker* pWalker) {
147	dmsg(2,("File: WalkDirectoryTreeSub(Dir=%s)\n", Dir.c_str()));
148	DWORD attrs = GetFileAttributes(Dir.c_str());
149	if (attrs == INVALID_FILE_ATTRIBUTES) return;
150
151	if (attrs & FILE_ATTRIBUTE_DIRECTORY) {
152	pWalker->DirectoryEntry(Dir);
153
154	std::string::size_type l = Dir.length() - 1;
155	if (Dir[l] == '/') Dir[l] = '\\';
156	else if (Dir[l] != '\\') Dir += '\\';
157
158	WIN32_FIND_DATA fd;
159	HANDLE h = FindFirstFile((Dir + "*").c_str(), &fd);
160	if (h == INVALID_HANDLE_VALUE) return;
161	do {
162	if (strcmp(fd.cFileName, ".") != 0 &&
163	strcmp(fd.cFileName, "..") != 0) {
164	WalkDirectoryTreeSub(Dir + fd.cFileName, pWalker);
165	}
166	} while (FindNextFile(h, &fd));
167	FindClose(h);
168	} else {
169	pWalker->FileEntry(Dir);
170	}
171	}
172	#else
173	int File::FtwCallback(const char* fpath, const struct stat* sb, int typeflag) {
174	dmsg(2,("File: FtwCallback(fpath=%s)\n", fpath));
175	try {
176	if (typeflag == FTW_D) DirectoryWalkers.back()->DirectoryEntry(std::string(fpath));
177	else if (typeflag == FTW_F) DirectoryWalkers.back()->FileEntry(std::string(fpath));
178	} catch(Exception e) {
179	e.PrintMessage();
180	DWErrorMsg = e.Message();
181	return -1;
182	}
183
184	return 0;
185	}
186	#endif
187	}