llfile.h
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- /**
- * @file llfile.h
- * @author Michael Schlachter
- * @date 2006-03-23
- * @brief Declaration of cross-platform POSIX file buffer and c++
- * stream classes.
- *
- * $LicenseInfo:firstyear=2006&license=viewergpl$
- *
- * Copyright (c) 2006-2010, Linden Research, Inc.
- *
- * Second Life Viewer Source Code
- * The source code in this file ("Source Code") is provided by Linden Lab
- * to you under the terms of the GNU General Public License, version 2.0
- * ("GPL"), unless you have obtained a separate licensing agreement
- * ("Other License"), formally executed by you and Linden Lab. Terms of
- * the GPL can be found in doc/GPL-license.txt in this distribution, or
- * online at http://secondlifegrid.net/programs/open_source/licensing/gplv2
- *
- * There are special exceptions to the terms and conditions of the GPL as
- * it is applied to this Source Code. View the full text of the exception
- * in the file doc/FLOSS-exception.txt in this software distribution, or
- * online at
- * http://secondlifegrid.net/programs/open_source/licensing/flossexception
- *
- * By copying, modifying or distributing this software, you acknowledge
- * that you have read and understood your obligations described above,
- * and agree to abide by those obligations.
- *
- * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
- * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
- * COMPLETENESS OR PERFORMANCE.
- * $/LicenseInfo$
- */
- #ifndef LL_LLFILE_H
- #define LL_LLFILE_H
- /**
- * This class provides a cross platform interface to the filesystem.
- * Attempts to mostly mirror the POSIX style IO functions.
- */
- typedef FILE LLFILE;
- #include <fstream>
- #ifdef LL_WINDOWS
- #define USE_LLFILESTREAMS 1
- #else
- #define USE_LLFILESTREAMS 0
- #endif
- #include <sys/stat.h>
- #if LL_WINDOWS
- // windows version of stat function and stat data structure are called _stat
- typedef struct _stat llstat;
- #else
- typedef struct stat llstat;
- #endif
- #ifndef S_ISREG
- # define S_ISREG(x) (((x) & S_IFMT) == S_IFREG)
- #endif
- #ifndef S_ISDIR
- # define S_ISDIR(x) (((x) & S_IFMT) == S_IFDIR)
- #endif
- #include "llstring.h" // safe char* -> std::string conversion
- class LL_COMMON_API LLFile
- {
- public:
- // All these functions take UTF8 path/filenames.
- static LLFILE* fopen(const std::string& filename,const char* accessmode); /* Flawfinder: ignore */
- static LLFILE* _fsopen(const std::string& filename,const char* accessmode,int sharingFlag);
- // perms is a permissions mask like 0777 or 0700. In most cases it will
- // be overridden by the user's umask. It is ignored on Windows.
- static int mkdir(const std::string& filename, int perms = 0700);
- static int rmdir(const std::string& filename);
- static int remove(const std::string& filename);
- static int rename(const std::string& filename,const std::string& newname);
- static int stat(const std::string& filename,llstat* file_status);
- static bool isdir(const std::string& filename);
- static bool isfile(const std::string& filename);
- static LLFILE * _Fiopen(const std::string& filename, std::ios::openmode mode,int); // protection currently unused
- static const char * tmpdir();
- };
- #if USE_LLFILESTREAMS
- class LL_COMMON_API llifstream : public std::basic_istream < char , std::char_traits < char > >
- {
- // input stream associated with a C stream
- public:
- typedef std::basic_ifstream<char,std::char_traits < char > > _Myt;
- typedef std::basic_filebuf<char,std::char_traits< char > > _Myfb;
- typedef std::basic_ios<char,std::char_traits< char > > _Myios;
- llifstream()
- : std::basic_istream<char,std::char_traits< char > >(NULL,true),_Filebuffer(NULL),_ShouldClose(false)
- { // construct unopened
- }
- explicit llifstream(const std::string& _Filename,
- ios_base::openmode _Mode = ios_base::in,
- int _Prot = (int)ios_base::_Openprot);
- explicit llifstream(_Filet *_File)
- : std::basic_istream<char,std::char_traits< char > >(NULL,true),
- _Filebuffer(new _Myfb(_File)),
- _ShouldClose(false)
- { // construct with specified C stream
- }
- virtual ~llifstream();
- _Myfb *rdbuf() const
- { // return pointer to file buffer
- return _Filebuffer;
- }
- bool is_open() const;
- void open(const std::string& _Filename, /* Flawfinder: ignore */
- ios_base::openmode _Mode = ios_base::in,
- int _Prot = (int)ios_base::_Openprot);
- void close();
- private:
- _Myfb* _Filebuffer; // the file buffer
- bool _ShouldClose;
- };
- class LL_COMMON_API llofstream : public std::basic_ostream< char , std::char_traits < char > >
- {
- public:
- typedef std::basic_ostream< char , std::char_traits < char > > _Myt;
- typedef std::basic_filebuf< char , std::char_traits < char > > _Myfb;
- typedef std::basic_ios<char,std::char_traits < char > > _Myios;
- llofstream()
- : std::basic_ostream<char,std::char_traits < char > >(NULL,true),_Filebuffer(NULL),_ShouldClose(false)
- { // construct unopened
- }
- explicit llofstream(const std::string& _Filename,
- std::ios_base::openmode _Mode = ios_base::out,
- int _Prot = (int)std::ios_base::_Openprot);
-
- explicit llofstream(_Filet *_File)
- : std::basic_ostream<char,std::char_traits < char > >(NULL,true),
- _Filebuffer(new _Myfb(_File)),//_File)
- _ShouldClose(false)
- { // construct with specified C stream
- }
- virtual ~llofstream();
- _Myfb *rdbuf() const
- { // return pointer to file buffer
- return _Filebuffer;
- }
- bool is_open() const;
- void open(const std::string& _Filename,ios_base::openmode _Mode = ios_base::out,int _Prot = (int)ios_base::_Openprot); /* Flawfinder: ignore */
- void close();
- private:
- _Myfb *_Filebuffer; // the file buffer
- bool _ShouldClose;
- };
- #else
- //Use standard file streams on non windows platforms
- //#define llifstream std::ifstream
- //#define llofstream std::ofstream
- class LL_COMMON_API llifstream : public std::ifstream
- {
- public:
- llifstream() : std::ifstream()
- {
- }
- explicit llifstream(const std::string& _Filename, std::_Ios_Openmode _Mode = in)
- : std::ifstream(_Filename.c_str(), _Mode)
- {
- }
- void open(const std::string& _Filename, std::_Ios_Openmode _Mode = in) /* Flawfinder: ignore */
- {
- std::ifstream::open(_Filename.c_str(), _Mode);
- }
- };
- class LL_COMMON_API llofstream : public std::ofstream
- {
- public:
- llofstream() : std::ofstream()
- {
- }
- explicit llofstream(const std::string& _Filename, std::_Ios_Openmode _Mode = out)
- : std::ofstream(_Filename.c_str(), _Mode)
- {
- }
- void open(const std::string& _Filename, std::_Ios_Openmode _Mode = out) /* Flawfinder: ignore */
- {
- std::ofstream::open(_Filename.c_str(), _Mode);
- }
- };
- #endif
- /**
- * @breif filesize helpers.
- *
- * The file size helpers are not considered particularly efficient,
- * and should only be used for config files and the like -- not in a
- * loop.
- */
- std::streamsize LL_COMMON_API llifstream_size(llifstream& fstr);
- std::streamsize LL_COMMON_API llofstream_size(llofstream& fstr);
- #endif // not LL_LLFILE_H