Mercurial > octave
view libinterp/corefcn/c-file-ptr-stream.cc @ 27919:1891570abac8
update Octave Project Developers copyright for the new year
In files that have the "Octave Project Developers" copyright notice,
update for 2020.
author | John W. Eaton <jwe@octave.org> |
---|---|
date | Mon, 06 Jan 2020 22:29:51 -0500 |
parents | b442ec6dda5c |
children | bd51beb6205e |
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/* Copyright (C) 2000-2020 The Octave Project Developers See the file COPYRIGHT.md in the top-level directory of this distribution or <https://octave.org/COPYRIGHT.html/>. 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 <https://www.gnu.org/licenses/>. */ #if defined (HAVE_CONFIG_H) # include "config.h" #endif #include <iomanip> #include "filepos-wrappers.h" #include "c-file-ptr-stream.h" #if ! defined (SEEK_SET) # define SEEK_SET 0 #endif #if ! defined (SEEK_CUR) # define SEEK_CUR 1 #endif #if ! defined (SEEK_END) # define SEEK_END 2 #endif c_file_ptr_buf::~c_file_ptr_buf (void) { buf_close (); } // FIXME: I'm sure there is room for improvement here... c_file_ptr_buf::int_type c_file_ptr_buf::overflow (int_type c) { if (f) return (c != traits_type::eof ()) ? std::fputc (c, f) : flush (); else return traits_type::not_eof (c); } c_file_ptr_buf::int_type c_file_ptr_buf::underflow_common (bool bump) { if (f) { int_type c = std::fgetc (f); if (! bump && c != traits_type::eof ()) ungetc (c, f); return c; } else return traits_type::eof (); } c_file_ptr_buf::int_type c_file_ptr_buf::pbackfail (int_type c) { return ((c != traits_type::eof () && f) ? ungetc (c, f) : traits_type::not_eof (c)); } std::streamsize c_file_ptr_buf::xsputn (const char *s, std::streamsize n) { if (f) return std::fwrite (s, 1, n, f); else return 0; } std::streamsize c_file_ptr_buf::xsgetn (char *s, std::streamsize n) { if (f) return std::fread (s, 1, n, f); else return 0; } static inline int seekdir_to_whence (std::ios::seekdir dir) { return (dir == std::ios::beg ? SEEK_SET : (dir == std::ios::cur ? SEEK_CUR : (dir == std::ios::end ? SEEK_END : dir))); } std::streampos c_file_ptr_buf::seekoff (std::streamoff offset, std::ios::seekdir dir, std::ios::openmode) { if (f) { octave_fseeko_wrapper (f, offset, seekdir_to_whence (dir)); return octave_ftello_wrapper (f); } else return 0; } std::streampos c_file_ptr_buf::seekpos (std::streampos offset, std::ios::openmode) { if (f) { octave_fseeko_wrapper (f, offset, SEEK_SET); return octave_ftello_wrapper (f); } else return 0; } int c_file_ptr_buf::sync (void) { flush (); return 0; } int c_file_ptr_buf::flush (void) { return f ? std::fflush (f) : traits_type::eof (); } int c_file_ptr_buf::buf_close (void) { int retval = -1; flush (); if (f) { retval = cf (f); f = nullptr; } return retval; } int c_file_ptr_buf::seek (off_t offset, int origin) { return f ? octave_fseeko_wrapper (f, offset, origin) : -1; } off_t c_file_ptr_buf::tell (void) { return f ? octave_ftello_wrapper (f) : -1; } int c_file_ptr_buf::file_close (FILE *f) { return std::fclose (f); } #if defined (HAVE_ZLIB) c_zfile_ptr_buf::~c_zfile_ptr_buf (void) { buf_close (); } // FIXME: I'm sure there is room for improvement here... c_zfile_ptr_buf::int_type c_zfile_ptr_buf::overflow (int_type c) { if (f) return (c != traits_type::eof ()) ? gzputc (f, c) : flush (); else return traits_type::not_eof (c); } c_zfile_ptr_buf::int_type c_zfile_ptr_buf::underflow_common (bool bump) { if (f) { int_type c = gzgetc (f); if (! bump && c != traits_type::eof ()) gzungetc (c, f); return c; } else return traits_type::eof (); } c_zfile_ptr_buf::int_type c_zfile_ptr_buf::pbackfail (int_type c) { return ((c != traits_type::eof () && f) ? gzungetc (c, f) : traits_type::not_eof (c)); } std::streamsize c_zfile_ptr_buf::xsputn (const char *s, std::streamsize n) { if (f) return gzwrite (f, s, n); else return 0; } std::streamsize c_zfile_ptr_buf::xsgetn (char *s, std::streamsize n) { if (f) return gzread (f, s, n); else return 0; } std::streampos c_zfile_ptr_buf::seekoff (std::streamoff /* offset */, std::ios::seekdir /* dir */, std::ios::openmode) { // FIXME #if 0 if (f) { gzseek (f, offset, seekdir_to_whence (dir)); return gztell (f); } else return 0; #endif return -1; } std::streampos c_zfile_ptr_buf::seekpos (std::streampos /* offset */, std::ios::openmode) { // FIXME #if 0 if (f) { gzseek (f, offset, SEEK_SET); return gztell (f); } else return 0; #endif return -1; } int c_zfile_ptr_buf::sync (void) { flush (); return 0; } int c_zfile_ptr_buf::flush (void) { // FIXME: do we need something more complex here, passing // something other than 0 for the second argument to gzflush and // checking the return value, etc.? return f ? gzflush (f, 0) : traits_type::eof (); } int c_zfile_ptr_buf::buf_close (void) { int retval = -1; flush (); if (f) { retval = cf (f); f = nullptr; } return retval; } #endif