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Diffstat (limited to 'libdimensionxx/cookie-fopencookie.cpp')
| -rw-r--r-- | libdimensionxx/cookie-fopencookie.cpp | 204 |
1 files changed, 0 insertions, 204 deletions
diff --git a/libdimensionxx/cookie-fopencookie.cpp b/libdimensionxx/cookie-fopencookie.cpp deleted file mode 100644 index 843cc45..0000000 --- a/libdimensionxx/cookie-fopencookie.cpp +++ /dev/null @@ -1,204 +0,0 @@ -/************************************************************************* - * Copyright (C) 2009 Tavian Barnes <tavianator@gmail.com> * - * * - * This file is part of The Dimension Library. * - * * - * The Dimension Library is free software; you can redistribute it and/ * - * or modify it under the terms of the GNU Lesser General Public License * - * as published by the Free Software Foundation; either version 3 of the * - * License, or (at your option) any later version. * - * * - * The Dimension Library 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 * - * Lesser General Public License for more details. * - * * - * You should have received a copy of the GNU Lesser General Public * - * License along with this program. If not, see * - * <http://www.gnu.org/licenses/>. * - *************************************************************************/ - -#include "dimensionxx.hpp" - -#ifndef _GNU_SOURCE - // For fopencookie() - #define _GNU_SOURCE -#endif -#include <stdio.h> - -// The conundrum: libdimension uses C I/O, with FILE*'s. We want to use C++ I/O -// with std::i/ostreams. If present, we use the nonportable GNU stdio extension -// fopencookie(), which creates a FILE* with custom read/write/seek functions. -// BSD also has a similar function, funopen() which we should use too. Failing -// in all that, fall back on a tmpfile() buffer (see cookie-tmpfile.cpp). - -namespace Dimension -{ - // FILE_Cookie pure virtual destructor - FILE_Cookie::~FILE_Cookie() { - if (m_file) { - // Bug if neither ~iFILE_Cookie nor ~oFILE_Cookie closed the FILE* - dmnsn_error(DMNSN_SEVERITY_HIGH, - "FILE* not closed by FILE_Cookie destructor"); - } - } - - namespace - { - // Cookie read function - ssize_t - cookie_read(void* cookie, char* buf, size_t size) - { - FILE_Cookie* fcookie = reinterpret_cast<FILE_Cookie*>(cookie); - iFILE_Cookie& ifcookie = dynamic_cast<iFILE_Cookie&>(*fcookie); - - // Do the unformatted read - ifcookie.istr().read(buf, size); - - if (ifcookie.istr().eof() || ifcookie.istr().good()) { - return ifcookie.istr().gcount(); // This returns 0 on an immediate EOF - // for us. - } else { - // Some non-EOF error - return -1; - } - } - - // Cookie write function - ssize_t - cookie_write(void* cookie, const char* buf, size_t size) - { - FILE_Cookie* fcookie = reinterpret_cast<FILE_Cookie*>(cookie); - oFILE_Cookie& ofcookie = dynamic_cast<oFILE_Cookie&>(*fcookie); - - // Do the unformatted write - ofcookie.ostr().write(buf, size); - - if (ofcookie.ostr().good()) { - // Write operation succeeded, so we must've written size bytes - return size; - } else { - // Write operation failed - return -1; - } - } - - // Cookie seek function - int - cookie_seek(void* cookie, off64_t* offset, int whence) - { - FILE_Cookie* fcookie = reinterpret_cast<FILE_Cookie*>(cookie); - iFILE_Cookie* ifcookie = dynamic_cast<iFILE_Cookie*>(fcookie); - oFILE_Cookie* ofcookie = dynamic_cast<oFILE_Cookie*>(fcookie); - - if (ifcookie) { - // If we have an input stream, seek it - switch (whence) { - case SEEK_SET: - ifcookie->istr().seekg(*offset, std::ios::beg); - break; - case SEEK_CUR: - ifcookie->istr().seekg(*offset, std::ios::cur); - break; - case SEEK_END: - ifcookie->istr().seekg(*offset, std::ios::end); - break; - } - - if (!ifcookie->istr().good()) { - // Seek failed - return 1; - } - } - - if (ofcookie) { - // If we have an output stream, seek it - switch (whence) { - case SEEK_SET: - ofcookie->ostr().seekp(*offset, std::ios::beg); - break; - case SEEK_CUR: - ofcookie->ostr().seekp(*offset, std::ios::cur); - break; - case SEEK_END: - ofcookie->ostr().seekp(*offset, std::ios::end); - } - - if (!ofcookie->ostr().good()) { - // Seek failed - return 1; - } - } - - // Seek succeeded - return 0; - } - } - - // Make an input FILE_Cookie - iFILE_Cookie::iFILE_Cookie(std::istream& istr) - : m_istr(&istr) - { - cookie_io_functions_t io_funcs; - io_funcs.read = &cookie_read; - io_funcs.write = 0; - io_funcs.seek = &cookie_seek; - io_funcs.close = 0; - - // Set the FILE* - file(fopencookie(reinterpret_cast<void*>(static_cast<FILE_Cookie*>(this)), - "r", io_funcs)); - } - - // iFILE_Cookie destructor - iFILE_Cookie::~iFILE_Cookie() - { - if (file()) { - // If the FILE* is open, close it and set it to NULL - fclose(file()); - file(0); - } - } - - // Make an output FILE_Cookie - oFILE_Cookie::oFILE_Cookie(std::ostream& ostr) - : m_ostr(&ostr) - { - cookie_io_functions_t io_funcs; - io_funcs.read = 0; - io_funcs.write = &cookie_write; - io_funcs.seek = &cookie_seek; - io_funcs.close = 0; - - // Set the FILE* - file(fopencookie(reinterpret_cast<void*>(static_cast<FILE_Cookie*>(this)), - "w", io_funcs)); - } - - // oFILE_Cookie destructor - oFILE_Cookie::~oFILE_Cookie() - { - if (file()) { - // If the FILE* is open, close it and set it to NULL - fclose(file()); - file(0); - } - } - - // Make an I/O FILE_Cookie - ioFILE_Cookie::ioFILE_Cookie(std::iostream& iostr) - : iFILE_Cookie(iostr, 0), oFILE_Cookie(iostr, 0) - { - cookie_io_functions_t io_funcs; - io_funcs.read = &cookie_read; - io_funcs.write = &cookie_write; - io_funcs.seek = &cookie_seek; - io_funcs.close = 0; - - file(fopencookie(reinterpret_cast<void*>(static_cast<FILE_Cookie*>(this)), - "r+", io_funcs)); - } - - // No-op ioFILE_Cookie destructor - ioFILE_Cookie::~ioFILE_Cookie() { } -} |