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/*
* Copyright (C) 2020 Linux Studio Plugins Project <https://lsp-plug.in/>
* (C) 2020 Vladimir Sadovnikov <sadko4u@gmail.com>
*
* This file is part of lsp-runtime-lib
* Created on: 14 июн. 2018 г.
*
* lsp-runtime-lib 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
* any later version.
*
* lsp-runtime-lib 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 lsp-runtime-lib. If not, see <https://www.gnu.org/licenses/>.
*/
#ifndef LSP_PLUG_IN_IO_IINSEQUENCE_H_
#define LSP_PLUG_IN_IO_IINSEQUENCE_H_
#include <lsp-plug.in/runtime/version.h>
#include <lsp-plug.in/common/types.h>
#include <lsp-plug.in/common/status.h>
#include <lsp-plug.in/runtime/LSPString.h>
#include <iconv.h>
namespace lsp
{
namespace io
{
class IInSequence
{
protected:
status_t nErrorCode;
protected:
inline status_t set_error(status_t error) { return nErrorCode = error; }
private:
IInSequence & operator = (const IInSequence &);
public:
explicit IInSequence();
virtual ~IInSequence();
public:
/**
* Return last error code
* @return last error code
*/
inline status_t last_error() const { return nErrorCode; };
/**
* Read amount of characters
* @param dst target buffer to read
* @param count number of characters to read
* @return actual number of characters read or negative value on end of stream
*/
virtual ssize_t read(lsp_wchar_t *dst, size_t count);
/**
* Read single character
* @return code of single character or negative value on end of stream
*/
virtual lsp_swchar_t read();
/**
* Read single line
* @param s string to store value
* @return status of operation
*/
virtual status_t read_line(LSPString *s, bool force = false);
/**
* Skip amount of characters
* @param count number of characters to skip
* @return number of skipped characters or negative error code
*/
virtual ssize_t skip(size_t count);
/**
* Close input stream
* @return status of operation
*/
virtual status_t close();
/**
* Mark position of the input sequence
* @param limit the read limit after that the mark becomes invalid,
* negative value is allowed to check support of mark() and reset()
* calls by sequence
* @return status of operation
* - STATUS_NOT_SUPPORTED if feature is not supported by this sequence
*/
virtual status_t mark(ssize_t limit);
/**
* Reset position to the sequence to previously set mark
* @return status of operation
* - STATUS_NOT_FOUND if mark was not set or became invalid
* - STATUS_NOT_SUPPORTED if feature is not supported by this sequence
*/
virtual status_t reset();
};
}
} /* namespace lsp */
#endif /* LSP_PLUG_IN_IO_IINSEQUENCE_H_ */
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