mem_stream.h

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/*
 *    Copyright (C) 2016-2020 Grok Image Compression Inc.
 *
 *    This source code is free software: you can redistribute it and/or  modify
 *    it under the terms of the GNU Affero General Public License, version 3,
 *    as published by the Free Software Foundation.
 *
 *    This source code 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 Affero General Public License for more details.
 *
 *    You should have received a copy of the GNU Affero General Public License
 *    along with this program.  If not, see <http://www.gnu.org/licenses/>.
 *
 */
 
#pragma once
namespace grk {
 
#ifdef _WIN32
        typedef void* grk_handle;
#else
typedef int32_t grk_handle;
#endif
 
struct buf_info {
        buf_info() :
                        buf_info(nullptr, 0, 0, false) {
        }
        buf_info(uint8_t *buffer, size_t offset, size_t length, bool owns) :
                        buf(buffer), off(offset), len(length), fd(0), ownsBuffer(owns) {
        }
        ~buf_info() {
                if (ownsBuffer)
                        delete[] buf;
        }
        uint8_t *buf;
        size_t off;
        size_t len;
        grk_handle fd;          // for file mapping
        bool ownsBuffer;
};
 
 grk_stream  *  create_mem_stream(uint8_t *buf, size_t len, bool ownsBuffer,
                bool is_read_stream);
size_t get_mem_stream_offset( grk_stream  *stream);
 
 grk_stream  *  create_mapped_file_read_stream(const char *fname);
 
}