Mercurial > octave
view libinterp/corefcn/c-file-ptr-stream.cc @ 31171:c90718a28a3c
maint: Merge stable to default.
author | Markus Mützel <markus.muetzel@gmx.de> |
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date | Tue, 02 Aug 2022 18:47:12 +0200 |
parents | 796f54d4ddbf |
children | e88a07dec498 |
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//////////////////////////////////////////////////////////////////////// // // Copyright (C) 2000-2022 The Octave Project Developers // // See the file COPYRIGHT.md in the top-level directory of this // distribution or <https://octave.org/copyright/>. // // 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" OCTAVE_NAMESPACE_BEGIN #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 (m_f) return (c != traits_type::eof ()) ? std::fputc (c, m_f) : flush (); else return traits_type::not_eof (c); } c_file_ptr_buf::int_type c_file_ptr_buf::underflow_common (bool bump) { if (m_f) { int_type c = std::fgetc (m_f); if (! bump && c != traits_type::eof ()) ungetc (c, m_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 () && m_f) ? ungetc (c, m_f) : traits_type::not_eof (c)); } std::streamsize c_file_ptr_buf::xsputn (const char *s, std::streamsize n) { if (m_f) return std::fwrite (s, 1, n, m_f); else return 0; } std::streamsize c_file_ptr_buf::xsgetn (char *s, std::streamsize n) { if (m_f) return std::fread (s, 1, n, m_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 (m_f) { octave_fseeko_wrapper (m_f, offset, seekdir_to_whence (dir)); return octave_ftello_wrapper (m_f); } else return 0; } std::streampos c_file_ptr_buf::seekpos (std::streampos offset, std::ios::openmode) { if (m_f) { octave_fseeko_wrapper (m_f, offset, SEEK_SET); return octave_ftello_wrapper (m_f); } else return 0; } int c_file_ptr_buf::sync (void) { flush (); return 0; } int c_file_ptr_buf::flush (void) { return m_f ? std::fflush (m_f) : traits_type::eof (); } int c_file_ptr_buf::buf_close (void) { int retval = -1; flush (); if (m_f) { retval = m_cf (m_f); m_f = nullptr; } return retval; } int c_file_ptr_buf::seek (off_t offset, int origin) { return m_f ? octave_fseeko_wrapper (m_f, offset, origin) : -1; } off_t c_file_ptr_buf::tell (void) { return m_f ? octave_ftello_wrapper (m_f) : -1; } int c_file_ptr_buf::file_close (FILE *m_f) { return std::fclose (m_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 (m_f) return (c != traits_type::eof ()) ? gzputc (m_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 (m_f) { int_type c = gzgetc (m_f); if (! bump && c != traits_type::eof ()) gzungetc (c, m_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 () && m_f) ? gzungetc (c, m_f) : traits_type::not_eof (c)); } std::streamsize c_zfile_ptr_buf::xsputn (const char *s, std::streamsize n) { if (m_f) return gzwrite (m_f, s, n); else return 0; } std::streamsize c_zfile_ptr_buf::xsgetn (char *s, std::streamsize n) { if (m_f) return gzread (m_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 (m_f) { gzseek (m_f, offset, seekdir_to_whence (dir)); return gztell (m_f); } else return 0; #endif return -1; } std::streampos c_zfile_ptr_buf::seekpos (std::streampos /* offset */, std::ios::openmode) { // FIXME #if 0 if (m_f) { gzseek (m_f, offset, SEEK_SET); return gztell (m_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 m_f ? gzflush (m_f, 0) : traits_type::eof (); } int c_zfile_ptr_buf::buf_close (void) { int retval = -1; flush (); if (m_f) { retval = m_cf (m_f); m_f = nullptr; } return retval; } #endif OCTAVE_NAMESPACE_END