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[/] [w11/] [tags/] [w11a_V0.6/] [tools/] [src/] [librw11/] [Rw11VirtDiskFile.cpp] - Rev 20
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// $Id: Rw11VirtDiskFile.cpp 509 2013-04-21 20:46:20Z mueller $ // // Copyright 2013- by Walter F.J. Mueller <W.F.J.Mueller@gsi.de> // // This program is free software; you may redistribute and/or modify it under // the terms of the GNU General Public License as published by the Free // Software Foundation, either version 2, or at your option any later version. // // This program 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 General Public License // for complete details. // // Revision History: // Date Rev Version Comment // 2013-04-14 506 1.0 Initial version // 2013-02-13 488 0.1 First draft // --------------------------------------------------------------------------- /*! \file \version $Id: Rw11VirtDiskFile.cpp 509 2013-04-21 20:46:20Z mueller $ \brief Implemenation of Rw11VirtDiskFile. */ #include <sys/types.h> #include <sys/stat.h> #include <fcntl.h> #include <unistd.h> #include "librtools/RosFill.hpp" #include "Rw11VirtDiskFile.hpp" using namespace std; /*! \class Retro::Rw11VirtDiskFile \brief FIXME_docs */ // all method definitions in namespace Retro namespace Retro { //------------------------------------------+----------------------------------- //! Default constructor Rw11VirtDiskFile::Rw11VirtDiskFile(Rw11Unit* punit) : Rw11VirtDisk(punit), fFd(0) {} //------------------------------------------+----------------------------------- //! Destructor Rw11VirtDiskFile::~Rw11VirtDiskFile() { if (fFd > 2) ::close(fFd); } //------------------------------------------+----------------------------------- //! FIXME_docs bool Rw11VirtDiskFile::Open(const std::string& url, RerrMsg& emsg) { if (!fUrl.Set(url, "|wpro|", emsg)) return false; bool wpro = fUrl.FindOpt("wpro"); int fd = ::open(fUrl.Path().c_str(), wpro ? O_RDONLY : O_RDWR); if (fd < 0) { emsg.InitErrno("Rw11VirtDiskFile::Open()", string("open() for '") + fUrl.Path() + string("' failed: "), errno); return false; } struct stat sbuf; if (::fstat(fd, &sbuf) < 0) { emsg.InitErrno("Rw11VirtDiskFile::Open()", string("stat() for '") + fUrl.Path() + string("' failed: "), errno); return false; } fFd = fd; fSize = sbuf.st_size; return true; } //------------------------------------------+----------------------------------- //! FIXME_docs bool Rw11VirtDiskFile::Read(size_t lba, size_t nblk, uint8_t* data, RerrMsg& emsg) { fStats.Inc(kStatNVDRead); fStats.Inc(kStatNVDReadBlk, double(nblk)); size_t seekpos = fBlkSize * lba; size_t nbyt = fBlkSize * nblk; if (seekpos >= fSize) { uint8_t* p = data; for (size_t i=0; i<nbyt; i++) *p++ = 0; return true; } if (!Seek(seekpos, emsg)) return false; ssize_t irc = ::read(fFd, data, nbyt); if (irc < 0) { emsg.InitErrno("Rw11VirtDiskFile::Read()", "read() failed: ", errno); return false; } if (irc < ssize_t(nbyt)) { uint8_t* p = data+irc; for (size_t i=irc; i<nbyt; i++) *p++ = 0; } return true; } //------------------------------------------+----------------------------------- //! FIXME_docs bool Rw11VirtDiskFile::Write(size_t lba, size_t nblk, const uint8_t* data, RerrMsg& emsg) { fStats.Inc(kStatNVDWrite); fStats.Inc(kStatNVDWriteBlk, double(nblk)); size_t seekpos = fBlkSize * lba; size_t nbyt = fBlkSize * nblk; if (!Seek(seekpos, emsg)) return false; ssize_t irc = ::write(fFd, data, nbyt); if (irc < ssize_t(nbyt)) { emsg.InitErrno("Rw11VirtDiskFile::Write()", string("write() failed: "), errno); return false; } if (seekpos+nbyt > fSize) fSize = seekpos+nbyt; return true; } //------------------------------------------+----------------------------------- //! FIXME_docs bool Rw11VirtDiskFile::Seek(size_t seekpos, RerrMsg& emsg) { if (::lseek(fFd, seekpos, SEEK_SET) < 0) { emsg.InitErrno("Rw11VirtDiskFile::Seek()", string("seek() failed: "), errno); return false; } return true; } //------------------------------------------+----------------------------------- //! FIXME_docs void Rw11VirtDiskFile::Dump(std::ostream& os, int ind, const char* text) const { RosFill bl(ind); os << bl << (text?text:"--") << "Rw11VirtDiskFile @ " << this << endl; os << bl << " fFd: " << fFd << endl; Rw11VirtDisk::Dump(os, ind, " ^"); return; } } // end namespace Retro
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