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Diffstat (limited to 'backend/genesys/buffer.cpp')
-rw-r--r-- | backend/genesys/buffer.cpp | 102 |
1 files changed, 0 insertions, 102 deletions
diff --git a/backend/genesys/buffer.cpp b/backend/genesys/buffer.cpp deleted file mode 100644 index f17e361..0000000 --- a/backend/genesys/buffer.cpp +++ /dev/null @@ -1,102 +0,0 @@ -/* sane - Scanner Access Now Easy. - - Copyright (C) 2019 Povilas Kanapickas <povilas@radix.lt> - - This file is part of the SANE package. - - This program 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 2 of the - License, 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 more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 59 Temple Place - Suite 330, Boston, - MA 02111-1307, USA. - - As a special exception, the authors of SANE give permission for - additional uses of the libraries contained in this release of SANE. - - The exception is that, if you link a SANE library with other files - to produce an executable, this does not by itself cause the - resulting executable to be covered by the GNU General Public - License. Your use of that executable is in no way restricted on - account of linking the SANE library code into it. - - This exception does not, however, invalidate any other reasons why - the executable file might be covered by the GNU General Public - License. - - If you submit changes to SANE to the maintainers to be included in - a subsequent release, you agree by submitting the changes that - those changes may be distributed with this exception intact. - - If you write modifications of your own for SANE, it is your choice - whether to permit this exception to apply to your modifications. - If you do not wish that, delete this exception notice. -*/ - -#include "buffer.h" -#include <cstring> -#include <stdexcept> - -namespace genesys { - -void Genesys_Buffer::alloc(std::size_t size) -{ - buffer_.resize(size); - avail_ = 0; - pos_ = 0; -} - -void Genesys_Buffer::clear() -{ - buffer_.clear(); - avail_ = 0; - pos_ = 0; -} - -void Genesys_Buffer::reset() -{ - avail_ = 0; - pos_ = 0; -} - -std::uint8_t* Genesys_Buffer::get_write_pos(std::size_t size) -{ - if (avail_ + size > buffer_.size()) - return nullptr; - if (pos_ + avail_ + size > buffer_.size()) - { - std::memmove(buffer_.data(), buffer_.data() + pos_, avail_); - pos_ = 0; - } - return buffer_.data() + pos_ + avail_; -} - -std::uint8_t* Genesys_Buffer::get_read_pos() -{ - return buffer_.data() + pos_; -} - -void Genesys_Buffer::produce(std::size_t size) -{ - if (size > buffer_.size() - avail_) - throw std::runtime_error("buffer size exceeded"); - avail_ += size; -} - -void Genesys_Buffer::consume(std::size_t size) -{ - if (size > avail_) - throw std::runtime_error("no more data in buffer"); - avail_ -= size; - pos_ += size; -} - -} // namespace genesys |