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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) 2006-2007, 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://secondlife.com/developers/opensource/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://secondlife.com/developers/opensource/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;
#ifdef LL_WINDOWS
#define USE_LLFILESTREAMS 1
#else
#define USE_LLFILESTREAMS 0
#endif
#if LL_WINDOWS
// windows version of stat function and stat data structure are called _stat
typedef struct _stat llstat;
#else
#include <sys/stat.h>
typedef struct stat llstat;
#endif
class LLFile
{
public:
// All these functions take UTF8 path/filenames.
static LLFILE* fopen(const char* filename,const char* accessmode); /* Flawfinder: ignore */
static LLFILE* _fsopen(const char* 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 char* filename, int perms = 0700);
static int rmdir(const char* filename);
static int remove(const char* filename);
static int rename(const char* filename,const char* newname);
static int stat(const char* filename,llstat* file_status);
static LLFILE * _Fiopen(const char *filename, std::ios::openmode mode,int); // protection currently unused
};
#if USE_LLFILESTREAMS
class 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 char *_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 char* _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 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)
{ // construct unopened
}
explicit llofstream(const char *_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)
{ // construct with specified C stream
}
virtual ~llofstream();
_Myfb *rdbuf() const
{ // return pointer to file buffer
return _Filebuffer;
}
bool is_open() const;
void open(const char *_Filename,ios_base::openmode _Mode = ios_base::out,int _Prot = (int)ios_base::_Openprot); /* Flawfinder: ignore */
void close();
private:
_Myfb *_Filebuffer; // the file buffer
};
#else
//Use standard file streams on non windows platforms
#define llifstream std::ifstream
#define llofstream std::ofstream
#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 llifstream_size(llifstream& fstr);
std::streamsize llofstream_size(llofstream& fstr);
#endif // not LL_LLFILE_H
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