Mercurial > octave-nkf
view libinterp/corefcn/zfstream.cc @ 19627:446c46af4b42 stable
strip trailing whitespace from most source files
* Makefile.am, NEWS, build-aux/common.mk, configure.ac,
doc/Makefile.am, doc/doxyhtml/Makefile.am,
doc/interpreter/Makefile.am, doc/interpreter/arith.txi,
doc/interpreter/audio.txi, doc/interpreter/basics.txi,
doc/interpreter/bugs.txi, doc/interpreter/container.txi,
doc/interpreter/cp-idx.txi, doc/interpreter/data.txi,
doc/interpreter/debug.txi, doc/interpreter/diagperm.txi,
doc/interpreter/diffeq.txi, doc/interpreter/doccheck/README,
doc/interpreter/doccheck/spellcheck, doc/interpreter/emacs.txi,
doc/interpreter/errors.txi, doc/interpreter/eval.txi,
doc/interpreter/expr.txi, doc/interpreter/external.txi,
doc/interpreter/fn-idx.txi, doc/interpreter/func.txi,
doc/interpreter/geometry.txi, doc/interpreter/geometryimages.m,
doc/interpreter/gpl.txi, doc/interpreter/grammar.txi,
doc/interpreter/gui.txi, doc/interpreter/image.txi,
doc/interpreter/install.txi, doc/interpreter/interp.txi,
doc/interpreter/interpimages.m, doc/interpreter/intro.txi,
doc/interpreter/io.txi, doc/interpreter/java.txi,
doc/interpreter/linalg.txi, doc/interpreter/macros.texi,
doc/interpreter/matrix.txi, doc/interpreter/munge-texi.pl,
doc/interpreter/nonlin.txi, doc/interpreter/numbers.txi,
doc/interpreter/obsolete.txi, doc/interpreter/octave-config.1,
doc/interpreter/octave.texi, doc/interpreter/oop.txi,
doc/interpreter/op-idx.txi, doc/interpreter/optim.txi,
doc/interpreter/package.txi, doc/interpreter/plot.txi,
doc/interpreter/poly.txi, doc/interpreter/preface.txi,
doc/interpreter/quad.txi, doc/interpreter/set.txi,
doc/interpreter/signal.txi, doc/interpreter/sparse.txi,
doc/interpreter/sparseimages.m, doc/interpreter/splineimages.m,
doc/interpreter/stats.txi, doc/interpreter/stmt.txi,
doc/interpreter/strings.txi, doc/interpreter/system.txi,
doc/interpreter/testfun.txi, doc/interpreter/tips.txi,
doc/interpreter/var.txi, doc/interpreter/vectorize.txi,
doc/liboctave/Makefile.am, doc/liboctave/array.texi,
doc/liboctave/bugs.texi, doc/liboctave/cp-idx.texi,
doc/liboctave/dae.texi, doc/liboctave/diffeq.texi,
doc/liboctave/error.texi, doc/liboctave/factor.texi,
doc/liboctave/fn-idx.texi, doc/liboctave/gpl.texi,
doc/liboctave/install.texi, doc/liboctave/intro.texi,
doc/liboctave/liboctave.texi, doc/liboctave/matvec.texi,
doc/liboctave/nleqn.texi, doc/liboctave/nlfunc.texi,
doc/liboctave/ode.texi, doc/liboctave/optim.texi,
doc/liboctave/preface.texi, doc/liboctave/quad.texi,
doc/liboctave/range.texi, doc/refcard/Makefile.am,
doc/refcard/refcard.tex, etc/HACKING, etc/NEWS.1, etc/NEWS.2,
etc/NEWS.3, etc/OLD-ChangeLogs/ChangeLog,
etc/OLD-ChangeLogs/doc-ChangeLog,
etc/OLD-ChangeLogs/scripts-ChangeLog,
etc/OLD-ChangeLogs/src-ChangeLog, etc/OLD-ChangeLogs/test-ChangeLog,
etc/PROJECTS, etc/README.Cygwin, etc/README.MacOS, etc/README.MinGW,
etc/README.gnuplot, etc/gdbinit, etc/icons/Makefile.am,
examples/@polynomial/end.m, examples/@polynomial/subsasgn.m,
examples/Makefile.am, examples/standalonebuiltin.cc,
libgui/Makefile.am, libgui/qterminal/libqterminal/README,
libgui/qterminal/libqterminal/unix/BlockArray.cpp,
libgui/qterminal/libqterminal/unix/BlockArray.h,
libgui/qterminal/libqterminal/unix/Character.h,
libgui/qterminal/libqterminal/unix/CharacterColor.h,
libgui/qterminal/libqterminal/unix/Emulation.cpp,
libgui/qterminal/libqterminal/unix/Emulation.h,
libgui/qterminal/libqterminal/unix/Filter.cpp,
libgui/qterminal/libqterminal/unix/Filter.h,
libgui/qterminal/libqterminal/unix/History.cpp,
libgui/qterminal/libqterminal/unix/History.h,
libgui/qterminal/libqterminal/unix/KeyboardTranslator.cpp,
libgui/qterminal/libqterminal/unix/KeyboardTranslator.h,
libgui/qterminal/libqterminal/unix/LineFont.h,
libgui/qterminal/libqterminal/unix/QUnixTerminalImpl.cpp,
libgui/qterminal/libqterminal/unix/QUnixTerminalImpl.h,
libgui/qterminal/libqterminal/unix/Screen.cpp,
libgui/qterminal/libqterminal/unix/Screen.h,
libgui/qterminal/libqterminal/unix/ScreenWindow.cpp,
libgui/qterminal/libqterminal/unix/ScreenWindow.h,
libgui/qterminal/libqterminal/unix/TerminalCharacterDecoder.cpp,
libgui/qterminal/libqterminal/unix/TerminalCharacterDecoder.h,
libgui/qterminal/libqterminal/unix/Vt102Emulation.h,
libgui/qterminal/libqterminal/win32/QWinTerminalImpl.cpp,
libgui/qterminal/qterminal/main.cpp,
libgui/src/m-editor/file-editor-tab.cc, libgui/src/octave-gui.cc,
libgui/src/octave-qt-link.cc, libinterp/corefcn/data.cc,
libinterp/corefcn/defun-int.h, libinterp/corefcn/det.cc,
libinterp/corefcn/gl2ps-renderer.cc, libinterp/corefcn/graphics.cc,
libinterp/corefcn/graphics.in.h, libinterp/corefcn/ls-mat5.cc,
libinterp/corefcn/lu.cc, libinterp/corefcn/oct-tex-parser.yy,
libinterp/corefcn/oct-tex-symbols.in, libinterp/corefcn/quadcc.cc,
libinterp/corefcn/zfstream.cc, libinterp/dldfcn/__eigs__.cc,
libinterp/dldfcn/__voronoi__.cc, libinterp/gendoc.pl,
libinterp/genprops.awk, libinterp/mk-errno-list, libinterp/mk-pkg-add,
libinterp/mkbuiltins, libinterp/mkdefs, libinterp/mkdocs,
libinterp/mkops, libinterp/octave-value/ov-java.cc,
libinterp/parse-tree/lex.ll, libinterp/parse-tree/oct-parse.in.yy,
libinterp/parse-tree/octave.gperf, liboctave/Makefile.am,
liboctave/array/Array.cc, liboctave/array/module.mk,
liboctave/cruft/daspk/datv.f, liboctave/cruft/daspk/dcnst0.f,
liboctave/cruft/daspk/dcnstr.f, liboctave/cruft/daspk/ddasic.f,
liboctave/cruft/daspk/ddasid.f, liboctave/cruft/daspk/ddasik.f,
liboctave/cruft/daspk/ddaspk.f, liboctave/cruft/daspk/ddstp.f,
liboctave/cruft/daspk/ddwnrm.f, liboctave/cruft/daspk/dfnrmd.f,
liboctave/cruft/daspk/dfnrmk.f, liboctave/cruft/daspk/dhels.f,
liboctave/cruft/daspk/dheqr.f, liboctave/cruft/daspk/dinvwt.f,
liboctave/cruft/daspk/dlinsd.f, liboctave/cruft/daspk/dlinsk.f,
liboctave/cruft/daspk/dmatd.f, liboctave/cruft/daspk/dnedd.f,
liboctave/cruft/daspk/dnedk.f, liboctave/cruft/daspk/dnsd.f,
liboctave/cruft/daspk/dnsid.f, liboctave/cruft/daspk/dnsik.f,
liboctave/cruft/daspk/dnsk.f, liboctave/cruft/daspk/dorth.f,
liboctave/cruft/daspk/dslvd.f, liboctave/cruft/daspk/dslvk.f,
liboctave/cruft/daspk/dspigm.f, liboctave/cruft/daspk/dyypnw.f,
liboctave/cruft/dasrt/ddasrt.f, liboctave/cruft/dasrt/drchek.f,
liboctave/cruft/dassl/ddaslv.f, liboctave/cruft/dassl/ddassl.f,
liboctave/cruft/misc/blaswrap.c, liboctave/cruft/misc/module.mk,
liboctave/cruft/odepack/cfode.f, liboctave/cruft/odepack/dlsode.f,
liboctave/cruft/odepack/ewset.f, liboctave/cruft/odepack/intdy.f,
liboctave/cruft/odepack/prepj.f, liboctave/cruft/odepack/sintdy.f,
liboctave/cruft/odepack/slsode.f, liboctave/cruft/odepack/solsy.f,
liboctave/cruft/odepack/ssolsy.f, liboctave/cruft/odepack/stode.f,
liboctave/cruft/odepack/vnorm.f, liboctave/cruft/ranlib/Basegen.doc,
liboctave/cruft/ranlib/README, liboctave/cruft/ranlib/genbet.f,
liboctave/cruft/ranlib/genexp.f, liboctave/cruft/ranlib/gennch.f,
liboctave/cruft/ranlib/gennf.f, liboctave/cruft/ranlib/gennor.f,
liboctave/cruft/ranlib/getsd.f, liboctave/cruft/ranlib/initgn.f,
liboctave/cruft/ranlib/phrtsd.f, liboctave/cruft/ranlib/randlib.fdoc,
liboctave/cruft/ranlib/setsd.f, liboctave/cruft/ranlib/tstgmn.for,
liboctave/cruft/ranlib/tstmid.for, liboctave/cruft/slatec-fn/atanh.f,
liboctave/cruft/slatec-fn/datanh.f,
liboctave/cruft/slatec-fn/xgmainc.f,
liboctave/cruft/slatec-fn/xsgmainc.f, liboctave/numeric/module.mk,
liboctave/operators/mk-ops.awk, liboctave/operators/mx-ops,
liboctave/operators/sparse-mk-ops.awk,
liboctave/operators/sparse-mx-ops, liboctave/operators/vx-ops,
liboctave/util/module.mk, run-octave.in, scripts/@ftp/ftp.m,
scripts/audio/wavread.m, scripts/deprecated/java_convert_matrix.m,
scripts/deprecated/java_debug.m, scripts/deprecated/java_invoke.m,
scripts/deprecated/java_new.m,
scripts/deprecated/java_unsigned_conversion.m,
scripts/deprecated/javafields.m, scripts/deprecated/javamethods.m,
scripts/deprecated/shell_cmd.m, scripts/general/accumarray.m,
scripts/general/display.m, scripts/general/fieldnames.m,
scripts/general/interp1.m, scripts/general/interp2.m,
scripts/general/interp3.m, scripts/general/isa.m,
scripts/general/methods.m, scripts/general/sortrows.m,
scripts/geometry/convhull.m, scripts/geometry/delaunay.m,
scripts/geometry/delaunay3.m, scripts/geometry/delaunayn.m,
scripts/geometry/griddata.m, scripts/geometry/griddatan.m,
scripts/geometry/voronoi.m, scripts/geometry/voronoin.m,
scripts/gui/guihandles.m, scripts/gui/inputdlg.m,
scripts/gui/listdlg.m, scripts/gui/msgbox.m, scripts/gui/questdlg.m,
scripts/gui/uigetfile.m, scripts/gui/waitbar.m, scripts/gui/warndlg.m,
scripts/help/doc.m, scripts/help/help.m, scripts/help/type.m,
scripts/image/bone.m, scripts/image/cmpermute.m,
scripts/image/cmunique.m, scripts/image/colorcube.m,
scripts/image/colormap.m, scripts/image/contrast.m,
scripts/image/gray2ind.m, scripts/image/image.m,
scripts/image/imshow.m, scripts/image/ind2gray.m, scripts/image/jet.m,
scripts/image/rgb2ntsc.m, scripts/image/spinmap.m,
scripts/io/importdata.m, scripts/io/strread.m, scripts/io/textread.m,
scripts/io/textscan.m, scripts/java/java_get.m,
scripts/java/java_set.m, scripts/java/javaaddpath.m,
scripts/java/javaclasspath.m, scripts/java/javamem.m,
scripts/linear-algebra/linsolve.m, scripts/linear-algebra/qzhess.m,
scripts/miscellaneous/debug.m, scripts/miscellaneous/desktop.m,
scripts/miscellaneous/dir.m, scripts/miscellaneous/dos.m,
scripts/miscellaneous/edit.m, scripts/miscellaneous/fact.m,
scripts/miscellaneous/getappdata.m, scripts/miscellaneous/inputname.m,
scripts/miscellaneous/license.m, scripts/miscellaneous/ls_command.m,
scripts/miscellaneous/run.m, scripts/miscellaneous/setfield.m,
scripts/miscellaneous/unix.m, scripts/miscellaneous/ver.m,
scripts/mk-pkg-add, scripts/mkdoc.pl,
scripts/optimization/fminsearch.m, scripts/optimization/optimset.m,
scripts/optimization/sqp.m, scripts/pkg/pkg.m,
scripts/pkg/private/create_pkgadddel.m,
scripts/pkg/private/fix_depends.m, scripts/pkg/private/install.m,
scripts/plot/appearance/axis.m, scripts/plot/appearance/box.m,
scripts/plot/appearance/clabel.m, scripts/plot/appearance/daspect.m,
scripts/plot/appearance/datetick.m, scripts/plot/appearance/grid.m,
scripts/plot/appearance/legend.m, scripts/plot/appearance/orient.m,
scripts/plot/appearance/shading.m, scripts/plot/appearance/text.m,
scripts/plot/appearance/title.m, scripts/plot/appearance/xlabel.m,
scripts/plot/appearance/ylabel.m, scripts/plot/appearance/zlabel.m,
scripts/plot/draw/area.m, scripts/plot/draw/bar.m,
scripts/plot/draw/barh.m, scripts/plot/draw/colorbar.m,
scripts/plot/draw/contour.m, scripts/plot/draw/contour3.m,
scripts/plot/draw/contourf.m, scripts/plot/draw/ellipsoid.m,
scripts/plot/draw/errorbar.m, scripts/plot/draw/ezcontour.m,
scripts/plot/draw/ezcontourf.m, scripts/plot/draw/ezmesh.m,
scripts/plot/draw/ezpolar.m, scripts/plot/draw/fill.m,
scripts/plot/draw/fplot.m, scripts/plot/draw/hist.m,
scripts/plot/draw/meshc.m, scripts/plot/draw/meshz.m,
scripts/plot/draw/pareto.m, scripts/plot/draw/patch.m,
scripts/plot/draw/peaks.m, scripts/plot/draw/pie.m,
scripts/plot/draw/pie3.m, scripts/plot/draw/plot.m,
scripts/plot/draw/plotyy.m, scripts/plot/draw/private/__bar__.m,
scripts/plot/draw/private/__contour__.m,
scripts/plot/draw/private/__errplot__.m,
scripts/plot/draw/private/__ezplot__.m,
scripts/plot/draw/private/__patch__.m,
scripts/plot/draw/private/__stem__.m, scripts/plot/draw/rectangle.m,
scripts/plot/draw/ribbon.m, scripts/plot/draw/rose.m,
scripts/plot/draw/scatter.m, scripts/plot/draw/scatter3.m,
scripts/plot/draw/semilogx.m, scripts/plot/draw/shrinkfaces.m,
scripts/plot/draw/sombrero.m, scripts/plot/draw/sphere.m,
scripts/plot/draw/stairs.m, scripts/plot/draw/stem.m,
scripts/plot/draw/stemleaf.m, scripts/plot/draw/surf.m,
scripts/plot/draw/surface.m, scripts/plot/draw/surfc.m,
scripts/plot/draw/surfl.m, scripts/plot/draw/surfnorm.m,
scripts/plot/draw/tetramesh.m, scripts/plot/draw/trimesh.m,
scripts/plot/draw/triplot.m, scripts/plot/draw/trisurf.m,
scripts/plot/util/__gnuplot_drawnow__.m,
scripts/plot/util/__plt_get_axis_arg__.m, scripts/plot/util/axes.m,
scripts/plot/util/clf.m, scripts/plot/util/copyobj.m,
scripts/plot/util/figure.m, scripts/plot/util/gcbo.m,
scripts/plot/util/graphics_toolkit.m, scripts/plot/util/hggroup.m,
scripts/plot/util/meshgrid.m, scripts/plot/util/newplot.m,
scripts/plot/util/print.m,
scripts/plot/util/private/__add_default_menu__.m,
scripts/plot/util/private/__fltk_print__.m,
scripts/plot/util/private/__gnuplot_print__.m,
scripts/plot/util/private/__print_parse_opts__.m,
scripts/plot/util/refreshdata.m, scripts/plot/util/subplot.m,
scripts/polynomial/conv.m, scripts/polynomial/poly.m,
scripts/polynomial/polyeig.m, scripts/polynomial/polyfit.m,
scripts/polynomial/polyval.m,
scripts/polynomial/private/__splinefit__.m,
scripts/polynomial/spline.m, scripts/prefs/prefdir.m,
scripts/prefs/preferences.m, scripts/prefs/private/prefsfile.m,
scripts/prefs/rmpref.m, scripts/signal/freqz.m,
scripts/signal/module.mk, scripts/sparse/eigs.m, scripts/sparse/pcg.m,
scripts/sparse/private/__sprand_impl__.m, scripts/sparse/sprand.m,
scripts/sparse/sprandn.m, scripts/sparse/spy.m, scripts/sparse/svds.m,
scripts/specfun/expint.m, scripts/specfun/factor.m,
scripts/special-matrix/gallery.m, scripts/special-matrix/hankel.m,
scripts/special-matrix/toeplitz.m, scripts/startup/inputrc,
scripts/statistics/base/kurtosis.m, scripts/statistics/base/moment.m,
scripts/statistics/base/qqplot.m, scripts/statistics/base/var.m,
scripts/statistics/distributions/betarnd.m,
scripts/statistics/distributions/binoinv.m,
scripts/statistics/distributions/binopdf.m,
scripts/statistics/distributions/binornd.m,
scripts/statistics/distributions/cauchy_rnd.m,
scripts/statistics/distributions/chi2rnd.m,
scripts/statistics/distributions/discrete_pdf.m,
scripts/statistics/distributions/discrete_rnd.m,
scripts/statistics/distributions/empirical_rnd.m,
scripts/statistics/distributions/exprnd.m,
scripts/statistics/distributions/frnd.m,
scripts/statistics/distributions/gamrnd.m,
scripts/statistics/distributions/geornd.m,
scripts/statistics/distributions/hygernd.m,
scripts/statistics/distributions/kolmogorov_smirnov_cdf.m,
scripts/statistics/distributions/laplace_cdf.m,
scripts/statistics/distributions/laplace_pdf.m,
scripts/statistics/distributions/logistic_cdf.m,
scripts/statistics/distributions/logistic_pdf.m,
scripts/statistics/distributions/lognrnd.m,
scripts/statistics/distributions/nbincdf.m,
scripts/statistics/distributions/nbininv.m,
scripts/statistics/distributions/nbinpdf.m,
scripts/statistics/distributions/nbinrnd.m,
scripts/statistics/distributions/normrnd.m,
scripts/statistics/distributions/poissinv.m,
scripts/statistics/distributions/poissrnd.m,
scripts/statistics/distributions/tinv.m,
scripts/statistics/distributions/trnd.m,
scripts/statistics/distributions/unidcdf.m,
scripts/statistics/distributions/unidpdf.m,
scripts/statistics/distributions/unidrnd.m,
scripts/statistics/distributions/unifrnd.m,
scripts/statistics/distributions/wblrnd.m,
scripts/statistics/models/module.mk,
scripts/statistics/tests/kruskal_wallis_test.m,
scripts/strings/base2dec.m, scripts/strings/deblank.m,
scripts/strings/dec2base.m, scripts/strings/dec2bin.m,
scripts/strings/dec2hex.m, scripts/strings/mat2str.m,
scripts/strings/ostrsplit.m, scripts/strings/regexptranslate.m,
scripts/strings/str2num.m, scripts/strings/strcat.m,
scripts/strings/strjoin.m, scripts/strings/strsplit.m,
scripts/strings/strtok.m, scripts/strings/strtrim.m,
scripts/strings/strtrunc.m, scripts/strings/substr.m,
scripts/testfun/__run_test_suite__.m, scripts/testfun/speed.m,
scripts/testfun/test.m, scripts/time/asctime.m,
scripts/time/datenum.m, scripts/time/datevec.m,
scripts/time/weekday.m, src/Makefile.am, test/Makefile.am,
test/build-bc-overload-tests.sh, test/build-sparse-tests.sh,
test/jit.tst, test/line-continue.tst: Strip trailing whitespace.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Tue, 20 Jan 2015 08:26:57 -0500 |
parents | 175b392e91fe |
children | 4197fc428c7d |
line wrap: on
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/* Copyright (C) 2005-2013 Ludwig Schwardt, Kevin Ruland This file is part of Octave. Octave is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. Octave 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 more details. You should have received a copy of the GNU General Public License along with Octave; see the file COPYING. If not, see <http://www.gnu.org/licenses/>. */ /* This file is adapted from the zlib 1.2.2 contrib/iostream3 code, written by Ludwig Schwardt <schwardt@sun.ac.za> original version by Kevin Ruland <kevin@rodin.wustl.edu> */ #ifdef HAVE_CONFIG_H #include <config.h> #endif #include <iostream> #include "zfstream.h" #ifdef HAVE_ZLIB #include <cstring> // for strcpy, strcat, strlen (mode strings) #include <cstdio> // for BUFSIZ // Internal buffer sizes (default and "unbuffered" versions) #define STASHED_CHARACTERS 16 #define BIGBUFSIZE (256 * 1024 + STASHED_CHARACTERS) #define SMALLBUFSIZE 1 /*****************************************************************************/ // Default constructor gzfilebuf::gzfilebuf () : file(0), io_mode(std::ios_base::openmode(0)), own_fd(false), buffer(0), buffer_size(BIGBUFSIZE), own_buffer(true) { // No buffers to start with this->disable_buffer (); } // Destructor gzfilebuf::~gzfilebuf () { // Sync output buffer and close only if responsible for file // (i.e. attached streams should be left open at this stage) this->sync (); if (own_fd) this->close (); // Make sure internal buffer is deallocated this->disable_buffer (); } // Set compression level and strategy int gzfilebuf::setcompression (int comp_level, int comp_strategy) { return gzsetparams (file, comp_level, comp_strategy); } // Open gzipped file gzfilebuf* gzfilebuf::open (const char *name, std::ios_base::openmode mode) { // Fail if file already open if (this->is_open ()) return 0; // Don't support simultaneous read/write access (yet) if ((mode & std::ios_base::in) && (mode & std::ios_base::out)) return 0; // Build mode string for gzopen and check it [27.8.1.3.2] char char_mode[6] = "\0\0\0\0\0"; if (! this->open_mode (mode, char_mode)) return 0; // Attempt to open file if ((file = gzopen (name, char_mode)) == 0) return 0; // On success, allocate internal buffer and set flags this->enable_buffer (); io_mode = mode; own_fd = true; return this; } // Attach to gzipped file gzfilebuf* gzfilebuf::attach (int fd, std::ios_base::openmode mode) { // Fail if file already open if (this->is_open ()) return 0; // Don't support simultaneous read/write access (yet) if ((mode & std::ios_base::in) && (mode & std::ios_base::out)) return 0; // Build mode string for gzdopen and check it [27.8.1.3.2] char char_mode[6] = "\0\0\0\0\0"; if (! this->open_mode (mode, char_mode)) return 0; // Attempt to attach to file if ((file = gzdopen (fd, char_mode)) == 0) return 0; // On success, allocate internal buffer and set flags this->enable_buffer (); io_mode = mode; own_fd = false; return this; } // Close gzipped file gzfilebuf* gzfilebuf::close () { // Fail immediately if no file is open if (! this->is_open ()) return 0; // Assume success gzfilebuf* retval = this; // Attempt to sync and close gzipped file if (this->sync () == -1) retval = 0; if (gzclose (file) < 0) retval = 0; // File is now gone anyway (postcondition [27.8.1.3.8]) file = 0; own_fd = false; // Destroy internal buffer if it exists this->disable_buffer (); return retval; } /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ // Convert int open mode to mode string bool gzfilebuf::open_mode (std::ios_base::openmode mode, char* c_mode) const { // FIXME: do we need testb? // bool testb = mode & std::ios_base::binary; bool testi = mode & std::ios_base::in; bool testo = mode & std::ios_base::out; bool testt = mode & std::ios_base::trunc; bool testa = mode & std::ios_base::app; // Check for valid flag combinations - see [27.8.1.3.2] (Table 92) // Original zfstream hardcoded the compression level to maximum here... // Double the time for less than 1% size improvement seems // excessive though - keeping it at the default level // To change back, just append "9" to the next three mode strings if (!testi && testo && !testt && !testa) strcpy (c_mode, "w"); if (!testi && testo && !testt && testa) strcpy (c_mode, "a"); if (!testi && testo && testt && !testa) strcpy (c_mode, "w"); if (testi && !testo && !testt && !testa) strcpy (c_mode, "r"); // No read/write mode yet // if (testi && testo && !testt && !testa) // strcpy(c_mode, "r+"); // if (testi && testo && testt && !testa) // strcpy(c_mode, "w+"); // Mode string should be empty for invalid combination of flags if (strlen (c_mode) == 0) return false; strcat (c_mode, "b"); return true; } // Determine number of characters in internal get buffer std::streamsize gzfilebuf::showmanyc () { // Calls to underflow will fail if file not opened for reading if (! this->is_open () || !(io_mode & std::ios_base::in)) return -1; // Make sure get area is in use if (this->gptr () && (this->gptr () < this->egptr ())) return std::streamsize (this->egptr () - this->gptr ()); else return 0; } // Puts back a character to the stream in two cases. Firstly, when there // is no putback position available, and secondly when the character putback // differs from the one in the file. We can only support the first case // with gzipped files. gzfilebuf::int_type gzfilebuf::pbackfail (gzfilebuf::int_type c) { if (this->is_open ()) { if (gzseek (file, this->gptr () - this->egptr () - 1, SEEK_CUR) < 0) return traits_type::eof (); // Invalidates contents of the buffer enable_buffer (); // Attempt to fill internal buffer from gzipped file // (buffer must be guaranteed to exist...) int bytes_read = gzread (file, buffer, buffer_size); // Indicates error or EOF if (bytes_read <= 0) { // Reset get area this->setg (buffer, buffer, buffer); return traits_type::eof (); } // Make all bytes read from file available as get area this->setg (buffer, buffer, buffer + bytes_read); // If next character in get area differs from putback character // flag a failure gzfilebuf::int_type ret = traits_type::to_int_type (*(this->gptr ())); if (ret != c) return traits_type::eof (); else return ret; } else return traits_type::eof (); } // Fill get area from gzipped file gzfilebuf::int_type gzfilebuf::underflow () { // If something is left in the get area by chance, return it // (this shouldn't normally happen, as underflow is only supposed // to be called when gptr >= egptr, but it serves as error check) if (this->gptr () && (this->gptr () < this->egptr ())) return traits_type::to_int_type (*(this->gptr ())); // If the file hasn't been opened for reading, produce error if (! this->is_open () || !(io_mode & std::ios_base::in)) return traits_type::eof (); // Copy the final characters to the front of the buffer int stash = 0; if (this->eback () && buffer && buffer_size > STASHED_CHARACTERS) { char_type *ptr1 = buffer; char_type *ptr2 = this->egptr () - STASHED_CHARACTERS + 1; if (ptr2 > this->eback ()) while (stash++ <= STASHED_CHARACTERS) *ptr1++ = *ptr2++; } // Attempt to fill internal buffer from gzipped file // (buffer must be guaranteed to exist...) int bytes_read = gzread (file, buffer + stash, buffer_size - stash); // Indicates error or EOF if (bytes_read <= 0) { // Reset get area this->setg (buffer, buffer, buffer); return traits_type::eof (); } // Make all bytes read from file plus the stash available as get area this->setg (buffer, buffer + stash, buffer + bytes_read + stash); // Return next character in get area return traits_type::to_int_type (*(this->gptr ())); } // Write put area to gzipped file gzfilebuf::int_type gzfilebuf::overflow (int_type c) { // Determine whether put area is in use if (this->pbase ()) { // Double-check pointer range if (this->pptr () > this->epptr () || this->pptr () < this->pbase ()) return traits_type::eof (); // Add extra character to buffer if not EOF if (! traits_type::eq_int_type (c, traits_type::eof ())) { *(this->pptr ()) = traits_type::to_char_type (c); this->pbump (1); } // Number of characters to write to file int bytes_to_write = this->pptr () - this->pbase (); // Overflow doesn't fail if nothing is to be written if (bytes_to_write > 0) { // If the file hasn't been opened for writing, produce error if (! this->is_open () || !(io_mode & std::ios_base::out)) return traits_type::eof (); // If gzipped file won't accept all bytes written to it, fail if (gzwrite (file, this->pbase (), bytes_to_write) != bytes_to_write) return traits_type::eof (); // Reset next pointer to point to pbase on success this->pbump (-bytes_to_write); } } // Write extra character to file if not EOF else if (! traits_type::eq_int_type (c, traits_type::eof ())) { // If the file hasn't been opened for writing, produce error if (! this->is_open () || !(io_mode & std::ios_base::out)) return traits_type::eof (); // Impromptu char buffer (allows "unbuffered" output) char_type last_char = traits_type::to_char_type (c); // If gzipped file won't accept this character, fail if (gzwrite (file, &last_char, 1) != 1) return traits_type::eof (); } // If you got here, you have succeeded (even if c was EOF) // The return value should therefore be non-EOF if (traits_type::eq_int_type (c, traits_type::eof ())) return traits_type::not_eof (c); else return c; } // Assign new buffer std::streambuf* gzfilebuf::setbuf (char_type* p, std::streamsize n) { // First make sure stuff is sync'ed, for safety if (this->sync () == -1) return 0; // If buffering is turned off on purpose via setbuf(0,0), still allocate one. // "Unbuffered" only really refers to put [27.8.1.4.10], while get needs at // least a buffer of size 1 (very inefficient though, therefore make it // bigger?). This follows from [27.5.2.4.3]/12 (gptr needs to point at // something, it seems). if (!p || !n) { // Replace existing buffer (if any) with small internal buffer this->disable_buffer (); buffer = 0; buffer_size = 0; own_buffer = true; this->enable_buffer (); } else { // Replace existing buffer (if any) with external buffer this->disable_buffer (); buffer = p; buffer_size = n; own_buffer = false; this->enable_buffer (); } return this; } // Write put area to gzipped file (i.e. ensures that put area is empty) int gzfilebuf::sync () { return traits_type::eq_int_type (this->overflow (), traits_type::eof ()) ? -1 : 0; } /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ // Allocate internal buffer void gzfilebuf::enable_buffer () { // If internal buffer required, allocate one if (own_buffer && !buffer) { // Check for buffered vs. "unbuffered" if (buffer_size > 0) { // Allocate internal buffer buffer = new char_type [buffer_size]; // Get area starts empty and will be expanded by underflow as needed this->setg (buffer, buffer, buffer); // Setup entire internal buffer as put area. // The one-past-end pointer actually points to the last element of // the buffer, so that overflow(c) can safely add the extra character // c to the sequence. These pointers remain in place for the // duration of the buffer this->setp (buffer, buffer + buffer_size - 1); } else { // Even in "unbuffered" case, (small?) get buffer is still required buffer_size = SMALLBUFSIZE; buffer = new char_type [buffer_size]; this->setg (buffer, buffer, buffer); // "Unbuffered" means no put buffer this->setp (0, 0); } } else { // If buffer already allocated, reset buffer pointers just to make sure no // stale chars are lying around this->setg (buffer, buffer, buffer); this->setp (buffer, buffer + buffer_size - 1); } } // Destroy internal buffer void gzfilebuf::disable_buffer () { // If internal buffer exists, deallocate it if (own_buffer && buffer) { // Preserve unbuffered status by zeroing size if (! this->pbase ()) buffer_size = 0; delete[] buffer; buffer = 0; this->setg (0, 0, 0); this->setp (0, 0); } else { // Reset buffer pointers to initial state if external buffer exists this->setg (buffer, buffer, buffer); if (buffer) this->setp (buffer, buffer + buffer_size - 1); else this->setp (0, 0); } } /* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ // Seek functions gzfilebuf::pos_type gzfilebuf::seekoff (off_type off, std::ios_base::seekdir way, std::ios_base::openmode) { pos_type ret = pos_type (off_type (-1)); if (this->is_open ()) { off_type computed_off = off; if ((io_mode & std::ios_base::in) && way == std::ios_base::cur) computed_off += this->gptr () - this->egptr (); // Handle tellg/tellp as a special case up front, no need to seek // or invalidate get/put buffers if (off == 0 && way == std::ios_base::cur) return pos_type (gztell (file) + computed_off); if (way == std::ios_base::beg) ret = pos_type (gzseek (file, computed_off, SEEK_SET)); else if (way == std::ios_base::cur) ret = pos_type (gzseek (file, computed_off, SEEK_CUR)); else // Can't seek from end of a gzipped file, so this will give -1 ret = pos_type (gzseek (file, computed_off, SEEK_END)); if (io_mode & std::ios_base::in) // Invalidates contents of the buffer enable_buffer (); else // flush contents of buffer to file overflow (); } return ret; } gzfilebuf::pos_type gzfilebuf::seekpos (pos_type sp, std::ios_base::openmode) { pos_type ret = pos_type (off_type (-1)); if (this->is_open ()) { ret = pos_type (gzseek (file, sp, SEEK_SET)); if (io_mode & std::ios_base::in) // Invalidates contents of the buffer enable_buffer (); else // flush contents of buffer to file overflow (); } return ret; } /*****************************************************************************/ // Default constructor initializes stream buffer gzifstream::gzifstream () : std::istream (0), sb () { this->init (&sb); } // Initialize stream buffer and open file gzifstream::gzifstream (const char* name, std::ios_base::openmode mode) : std::istream (0), sb () { this->init (&sb); this->open (name, mode); } // Initialize stream buffer and attach to file gzifstream::gzifstream (int fd, std::ios_base::openmode mode) : std::istream (0), sb () { this->init (&sb); this->attach (fd, mode); } // Open file and go into fail() state if unsuccessful void gzifstream::open (const char* name, std::ios_base::openmode mode) { if (! sb.open (name, mode | std::ios_base::in)) this->setstate (std::ios_base::failbit); else this->clear (); } // Attach to file and go into fail() state if unsuccessful void gzifstream::attach (int fd, std::ios_base::openmode mode) { if (! sb.attach (fd, mode | std::ios_base::in)) this->setstate (std::ios_base::failbit); else this->clear (); } // Close file void gzifstream::close () { if (! sb.close ()) this->setstate (std::ios_base::failbit); } /*****************************************************************************/ // Default constructor initializes stream buffer gzofstream::gzofstream () : std::ostream (0), sb () { this->init (&sb); } // Initialize stream buffer and open file gzofstream::gzofstream (const char* name, std::ios_base::openmode mode) : std::ostream (0), sb () { this->init (&sb); this->open (name, mode); } // Initialize stream buffer and attach to file gzofstream::gzofstream (int fd, std::ios_base::openmode mode) : std::ostream (0), sb () { this->init (&sb); this->attach (fd, mode); } // Open file and go into fail() state if unsuccessful void gzofstream::open (const char* name, std::ios_base::openmode mode) { if (! sb.open (name, mode | std::ios_base::out)) this->setstate (std::ios_base::failbit); else this->clear (); } // Attach to file and go into fail() state if unsuccessful void gzofstream::attach (int fd, std::ios_base::openmode mode) { if (! sb.attach (fd, mode | std::ios_base::out)) this->setstate (std::ios_base::failbit); else this->clear (); } // Close file void gzofstream::close () { if (! sb.close ()) this->setstate (std::ios_base::failbit); } #endif // HAVE_ZLIB