252 lines
6.8 KiB
C++
252 lines
6.8 KiB
C++
/**
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* @file llfile.cpp
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* @author Michael Schlachter
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* @date 2006-03-23
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* @brief Implementation of cross-platform POSIX file buffer and c++
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* stream classes.
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*
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* Copyright (c) 2006-$CurrentYear$, Linden Research, Inc.
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* $License$
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*/
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#include "llfile.h"
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#include "llstring.h"
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#include "llerror.h"
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using namespace std;
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// static
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int LLFile::mkdir(const char* dirname, int perms)
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{
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#if LL_WINDOWS
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// permissions are ignored on Windows
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std::string utf8dirname = dirname;
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llutf16string utf16dirname = utf8str_to_utf16str(utf8dirname);
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return _wmkdir(utf16dirname.c_str());
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#else
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return ::mkdir(dirname, (mode_t)perms);
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#endif
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}
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// static
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LLFILE* LLFile::fopen(const char* filename, const char* mode) /* Flawfinder: ignore */
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{
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#if LL_WINDOWS
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std::string utf8filename = filename;
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std::string utf8mode = mode;
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llutf16string utf16filename = utf8str_to_utf16str(utf8filename);
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llutf16string utf16mode = utf8str_to_utf16str(utf8mode);
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return _wfopen(utf16filename.c_str(),utf16mode.c_str());
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#else
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return ::fopen(filename,mode); /* Flawfinder: ignore */
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#endif
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}
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LLFILE* LLFile::_fsopen(const char* filename, const char* mode, int sharingFlag)
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{
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#if LL_WINDOWS
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std::string utf8filename = filename;
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std::string utf8mode = mode;
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llutf16string utf16filename = utf8str_to_utf16str(utf8filename);
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llutf16string utf16mode = utf8str_to_utf16str(utf8mode);
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return _wfsopen(utf16filename.c_str(),utf16mode.c_str(),sharingFlag);
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#else
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llassert(0);//No corresponding function on non-windows
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return NULL;
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#endif
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}
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int LLFile::remove(const char* filename)
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{
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#if LL_WINDOWS
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std::string utf8filename = filename;
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llutf16string utf16filename = utf8str_to_utf16str(utf8filename);
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return _wremove(utf16filename.c_str());
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#else
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return ::remove(filename);
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#endif
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}
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int LLFile::rename(const char* filename, const char* newname)
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{
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#if LL_WINDOWS
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std::string utf8filename = filename;
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std::string utf8newname = newname;
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llutf16string utf16filename = utf8str_to_utf16str(utf8filename);
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llutf16string utf16newname = utf8str_to_utf16str(utf8newname);
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return _wrename(utf16filename.c_str(),utf16newname.c_str());
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#else
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return ::rename(filename,newname);
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#endif
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}
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int LLFile::stat(const char* filename, llstat* filestatus)
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{
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#if LL_WINDOWS
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std::string utf8filename = filename;
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llutf16string utf16filename = utf8str_to_utf16str(utf8filename);
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return _wstat(utf16filename.c_str(),filestatus);
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#else
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return ::stat(filename,filestatus);
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#endif
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}
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/***************** Modified file stream created to overcome the incorrect behaviour of posix fopen in windows *******************/
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#if USE_LLFILESTREAMS
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LLFILE * LLFile::_Fiopen(const char *filename, std::ios::openmode mode,int) // protection currently unused
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{ // open a file
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static const char *mods[] =
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{ // fopen mode strings corresponding to valid[i]
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"r", "w", "w", "a", "rb", "wb", "wb", "ab",
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"r+", "w+", "a+", "r+b", "w+b", "a+b",
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0};
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static const int valid[] =
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{ // valid combinations of open flags
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ios_base::in,
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ios_base::out,
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ios_base::out | ios_base::trunc,
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ios_base::out | ios_base::app,
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ios_base::in | ios_base::binary,
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ios_base::out | ios_base::binary,
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ios_base::out | ios_base::trunc | ios_base::binary,
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ios_base::out | ios_base::app | ios_base::binary,
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ios_base::in | ios_base::out,
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ios_base::in | ios_base::out | ios_base::trunc,
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ios_base::in | ios_base::out | ios_base::app,
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ios_base::in | ios_base::out | ios_base::binary,
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ios_base::in | ios_base::out | ios_base::trunc
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| ios_base::binary,
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ios_base::in | ios_base::out | ios_base::app
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| ios_base::binary,
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0};
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FILE *fp = 0;
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int n;
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ios_base::openmode atendflag = mode & ios_base::ate;
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ios_base::openmode norepflag = mode & ios_base::_Noreplace;
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if (mode & ios_base::_Nocreate)
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mode |= ios_base::in; // file must exist
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mode &= ~(ios_base::ate | ios_base::_Nocreate | ios_base::_Noreplace);
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for (n = 0; valid[n] != 0 && valid[n] != mode; ++n)
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; // look for a valid mode
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if (valid[n] == 0)
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return (0); // no valid mode
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else if (norepflag && mode & (ios_base::out || ios_base::app)
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&& (fp = LLFile::fopen(filename, "r")) != 0) /* Flawfinder: ignore */
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{ // file must not exist, close and fail
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fclose(fp);
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return (0);
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}
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else if (fp != 0 && fclose(fp) != 0)
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return (0); // can't close after test open
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// should open with protection here, if other than default
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else if ((fp = LLFile::fopen(filename, mods[n])) == 0) /* Flawfinder: ignore */
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return (0); // open failed
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if (!atendflag || fseek(fp, 0, SEEK_END) == 0)
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return (fp); // no need to seek to end, or seek succeeded
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fclose(fp); // can't position at end
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return (0);
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}
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/************** input file stream ********************************/
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void llifstream::close()
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{ // close the C stream
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if (_Filebuffer && _Filebuffer->close() == 0)
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{
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_Myios::setstate(ios_base::failbit); /*Flawfinder: ignore*/
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}
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}
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void llifstream::open(const char *_Filename,
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ios_base::openmode _Mode,
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int _Prot) /* Flawfinder: ignore */
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{ // open a C stream with specified mode
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FILE* filep = LLFile::_Fiopen(_Filename,_Mode | ios_base::in, _Prot);
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if(filep == NULL)
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{
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_Myios::setstate(ios_base::failbit); /*Flawfinder: ignore*/
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return;
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}
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llassert(_Filebuffer == NULL);
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_Filebuffer = new _Myfb(filep);
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_Myios::init(_Filebuffer);
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}
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bool llifstream::is_open() const
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{ // test if C stream has been opened
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if(_Filebuffer)
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return (_Filebuffer->is_open());
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return false;
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}
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llifstream::~llifstream()
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{
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delete _Filebuffer;
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}
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llifstream::llifstream(const char *_Filename,
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ios_base::openmode _Mode,
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int _Prot)
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: std::basic_istream< char , std::char_traits< char > >(NULL,true),_Filebuffer(NULL)
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{ // construct with named file and specified mode
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open(_Filename, _Mode | ios_base::in, _Prot); /* Flawfinder: ignore */
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}
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/************** output file stream ********************************/
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bool llofstream::is_open() const
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{ // test if C stream has been opened
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if(_Filebuffer)
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return (_Filebuffer->is_open());
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return false;
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}
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void llofstream::open(const char *_Filename,
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ios_base::openmode _Mode,
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int _Prot) /* Flawfinder: ignore */
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{ // open a C stream with specified mode
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FILE* filep = LLFile::_Fiopen(_Filename,_Mode | ios_base::out, _Prot);
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if(filep == NULL)
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{
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_Myios::setstate(ios_base::failbit); /*Flawfinder: ignore*/
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return;
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}
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llassert(_Filebuffer==NULL);
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_Filebuffer = new _Myfb(filep);
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_Myios::init(_Filebuffer);
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}
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void llofstream::close()
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{ // close the C stream
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llassert(_Filebuffer);
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if (_Filebuffer->close() == 0)
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_Myios::setstate(ios_base::failbit); /*Flawfinder: ignore*/
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}
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llofstream::llofstream(const char *_Filename,
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std::ios_base::openmode _Mode,
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int _Prot)
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: std::basic_ostream<char,std::char_traits < char > >(NULL,true),_Filebuffer(NULL)
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{ // construct with named file and specified mode
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open(_Filename, _Mode , _Prot); /* Flawfinder: ignore */
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}
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llofstream::~llofstream()
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{ // destroy the object
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delete _Filebuffer;
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}
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#endif // #if USE_LLFILESTREAMS
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