mirror of
https://github.com/FirebirdSQL/firebird.git
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87 lines
2.5 KiB
C
87 lines
2.5 KiB
C
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/*
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* The contents of this file are subject to the Initial
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* Developer's Public License Version 1.0 (the "License");
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* you may not use this file except in compliance with the
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* License. You may obtain a copy of the License at
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* http://www.ibphoenix.com/main.nfs?a=ibphoenix&page=ibp_idpl.
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*
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* Software distributed under the License is distributed AS IS,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied.
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* See the License for the specific language governing rights
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* and limitations under the License.
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*
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* The Original Code was created by Claudio Valderrama on 16-Mar-2007
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* for the Firebird Open Source RDBMS project.
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*
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* Copyright (c) 2007 Claudio Valderrama
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* and all contributors signed below.
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*
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* All Rights Reserved.
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* Contributor(s): ______________________________________.
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*
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*/
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#ifndef FB_USER_BLOB_H
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#define FB_USER_BLOB_H
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#include "firebird.h"
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#include <memory.h>
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class UserBlob
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{
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public:
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explicit UserBlob(ISC_STATUS* status);
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~UserBlob();
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bool open(FB_API_HANDLE& db, FB_API_HANDLE& trans, ISC_QUAD& blobid);
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bool open(FB_API_HANDLE& db, FB_API_HANDLE& trans, ISC_QUAD& blobid,
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USHORT bpb_len, const UCHAR* bpb);
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bool create(FB_API_HANDLE& db, FB_API_HANDLE& trans, ISC_QUAD& blobid);
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bool create(FB_API_HANDLE& db, FB_API_HANDLE& trans, ISC_QUAD& blobid,
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USHORT bpb_len, const UCHAR* bpb);
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bool close(bool force_internal_SV = false);
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bool getSegment(size_t len, size_t& real_len, void* buffer);
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bool getData(size_t len, size_t& real_len, void* buffer, bool use_sep, const UCHAR separator);
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bool putSegment(size_t len, const void* buffer);
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bool putSegment(size_t len, size_t& real_len, const void* buffer);
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bool putData(size_t len, size_t& real_len, const void* buffer);
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bool isOpen() const;
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bool getInfo(size_t items_size, const UCHAR* blr_items, size_t info_size, UCHAR* blob_info) const;
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static bool blobIsNull(const ISC_QUAD& blobid);
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private:
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enum b_direction
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{
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dir_none,
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dir_read,
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dir_write
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};
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ISC_STATUS* const m_status;
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FB_API_HANDLE m_blob;
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b_direction m_direction;
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ISC_STATUS_ARRAY m_default_status;
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};
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inline UserBlob::UserBlob(ISC_STATUS* status)
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: m_status(status ? status : m_default_status), m_blob(0), m_direction(dir_none)
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{
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memset(m_default_status, 0, sizeof(m_default_status));
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}
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inline UserBlob::~UserBlob()
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{
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close(true);
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}
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inline bool UserBlob::isOpen() const
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{
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return m_blob != 0 && m_direction != dir_none;
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}
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inline bool UserBlob::blobIsNull(const ISC_QUAD& blobid)
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{
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return blobid.gds_quad_high == 0 && blobid.gds_quad_low == 0;
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}
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#endif // FB_USER_BLOB_H
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