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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.
*
* $LicenseInfo:firstyear=2006&license=viewerlgpl$
* 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>
#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;
#include <ext/stdio_filebuf.h>
#include <bits/postypes.h>
#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 bool copy(const std::string from, const std::string to);
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);
static const char * tmpdir();
};
#if LL_WINDOWS
/**
* @brief Controlling input for files.
*
* This class supports reading from named files, using the inherited
* functions from std::ifstream. The only added value is that our constructor
* Does The Right Thing when passed a non-ASCII pathname. Sadly, that isn't
* true of Microsoft's std::ifstream.
*/
class LL_COMMON_API llifstream : public std::ifstream
{
// input stream associated with a C stream
public:
// Constructors:
/**
* @brief Default constructor.
*
* Initializes @c sb using its default constructor, and passes
* @c &sb to the base class initializer. Does not open any files
* (you haven't given it a filename to open).
*/
llifstream();
/**
* @brief Create an input file stream.
* @param Filename String specifying the filename.
* @param Mode Open file in specified mode (see std::ios_base).
*
* @c ios_base::in is automatically included in @a mode.
*/
explicit llifstream(const std::string& _Filename,
ios_base::openmode _Mode = ios_base::in);
/**
* @brief Opens an external file.
* @param Filename The name of the file.
* @param Node The open mode flags.
*
* Calls @c llstdio_filebuf::open(s,mode|in). If that function
* fails, @c failbit is set in the stream's error state.
*/
void open(const std::string& _Filename,
ios_base::openmode _Mode = ios_base::in);
};
/**
* @brief Controlling output for files.
*
* This class supports writing to named files, using the inherited functions
* from std::ofstream. The only added value is that our constructor Does The
* Right Thing when passed a non-ASCII pathname. Sadly, that isn't true of
* Microsoft's std::ofstream.
*/
class LL_COMMON_API llofstream : public std::ofstream
{
public:
// Constructors:
/**
* @brief Default constructor.
*
* Initializes @c sb using its default constructor, and passes
* @c &sb to the base class initializer. Does not open any files
* (you haven't given it a filename to open).
*/
llofstream();
/**
* @brief Create an output file stream.
* @param Filename String specifying the filename.
* @param Mode Open file in specified mode (see std::ios_base).
*
* @c ios_base::out is automatically included in @a mode.
*/
explicit llofstream(const std::string& _Filename,
ios_base::openmode _Mode = ios_base::out|ios_base::trunc);
/**
* @brief Opens an external file.
* @param Filename The name of the file.
* @param Node The open mode flags.
*
* @c ios_base::out is automatically included in @a mode.
*/
void open(const std::string& _Filename,
ios_base::openmode _Mode = ios_base::out|ios_base::trunc);
};
/**
* @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);
#else // ! LL_WINDOWS
// on non-windows, llifstream and llofstream are just mapped directly to the std:: equivalents
typedef std::ifstream llifstream;
typedef std::ofstream llofstream;
#endif // LL_WINDOWS or ! LL_WINDOWS
#endif // not LL_LLFILE_H
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