/** * @file llfile.h * @author Michael Schlachter * @date 2006-03-23 * @brief Declaration of cross-platform POSIX file buffer and c++ * stream classes. * * $LicenseInfo:firstyear=2006&license=viewerlgpl$ * Second Life Viewer Source Code * Copyright (C) 2010, Linden Research, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public * License as published by the Free Software Foundation; * version 2.1 of the License only. * * This library 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 * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA * * Linden Research, Inc., 945 Battery Street, San Francisco, CA 94111 USA * $/LicenseInfo$ */ #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); static int close(LLFILE * file); // 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