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106 lines
3.1 KiB
C
106 lines
3.1 KiB
C
/*
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* PROGRAM: JRD Access Method
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* MODULE: guid.h
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* DESCRIPTION: Portable GUID definition
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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 Nickolay Samofatov
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* for the Firebird Open Source RDBMS project.
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*
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* Copyright (c) 2004 Nickolay Samofatov <nickolay@broadviewsoftware.com>
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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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*
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*/
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#ifndef GUID_H
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#define GUID_H
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#include <stdlib.h>
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#include <stdio.h>
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#include "fb_types.h"
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const int GUID_BUFF_SIZE = 39;
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const int GUID_BODY_SIZE = 36;
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const char* const GUID_LEGACY_FORMAT =
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"{%04hX%04hX-%04hX-%04hX-%04hX-%04hX%04hX%04hX}";
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const char* const GUID_NEW_FORMAT =
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"{%02hX%02hX%02hX%02hX-%02hX%02hX-%02hX%02hX-%02hX%02hX-%02hX%02hX%02hX%02hX%02hX%02hX}";
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struct FB_GUID
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{
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USHORT data[8];
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};
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void GenerateRandomBytes(void* buffer, size_t size);
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void GenerateGuid(FB_GUID* guid);
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// These functions receive buffers of at least GUID_BUFF_SIZE length
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inline void GuidToString(char* buffer, const FB_GUID* guid, bool legacy)
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{
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if (legacy) // nbackup guid
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{
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sprintf(buffer, GUID_LEGACY_FORMAT,
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guid->data[0], guid->data[1], guid->data[2], guid->data[3],
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guid->data[4], guid->data[5], guid->data[6], guid->data[7]);
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}
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else
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{
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sprintf(buffer, GUID_NEW_FORMAT,
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guid->data[0] & 0xFF, guid->data[0] >> 8,
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guid->data[1] & 0xFF, guid->data[1] >> 8,
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guid->data[2] & 0xFF, guid->data[2] >> 8,
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guid->data[3] & 0xFF, guid->data[3] >> 8,
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guid->data[4] & 0xFF, guid->data[4] >> 8,
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guid->data[5] & 0xFF, guid->data[5] >> 8,
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guid->data[6] & 0xFF, guid->data[6] >> 8,
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guid->data[7] & 0xFF, guid->data[7] >> 8);
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}
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}
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inline void StringToGuid(FB_GUID* guid, const char* buffer, bool legacy)
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{
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if (legacy) // nbackup guid
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{
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sscanf(buffer, GUID_LEGACY_FORMAT,
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&guid->data[0], &guid->data[1], &guid->data[2], &guid->data[3],
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&guid->data[4], &guid->data[5], &guid->data[6], &guid->data[7]);
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}
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else
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{
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USHORT bytes[16];
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sscanf(buffer, GUID_NEW_FORMAT,
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&bytes[0], &bytes[1], &bytes[2], &bytes[3],
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&bytes[4], &bytes[5], &bytes[6], &bytes[7],
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&bytes[8], &bytes[9], &bytes[10], &bytes[11],
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&bytes[12], &bytes[13], &bytes[14], &bytes[15]);
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guid->data[0] = bytes[0] | (bytes[1] << 8);
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guid->data[1] = bytes[2] | (bytes[3] << 8);
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guid->data[2] = bytes[4] | (bytes[5] << 8);
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guid->data[3] = bytes[6] | (bytes[7] << 8);
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guid->data[4] = bytes[8] | (bytes[9] << 8);
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guid->data[5] = bytes[10] | (bytes[11] << 8);
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guid->data[6] = bytes[12] | (bytes[13] << 8);
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guid->data[7] = bytes[14] | (bytes[15] << 8);
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}
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}
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#endif
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