/* Copyright (c) 2008, XenSource Inc.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *     * Redistributions of source code must retain the above copyright
 *       notice, this list of conditions and the following disclaimer.
 *     * Redistributions in binary form must reproduce the above copyright
 *       notice, this list of conditions and the following disclaimer in the
 *       documentation and/or other materials provided with the distribution.
 *     * Neither the name of XenSource Inc. nor the names of its contributors
 *       may be used to endorse or promote products derived from this software
 *       without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
 * OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
/* Modified March 2016 Timothe Litt to work under windows.
* Copyright (C) 2016 Timothe Litt
* Modifications subject to the same license terms as above,
* substituting "Timothe Litt" for "XenSource Inc."
*/

#ifndef __BLKTAP2_UUID_H__
#define __BLKTAP2_UUID_H__

#if defined(__linux__)

#include <uuid/uuid.h>

typedef struct {
    uuid_t uuid;
} blk_uuid_t;

static inline int blk_uuid_is_nil(blk_uuid_t *uuid)
{
	return uuid_is_null(uuid->uuid);
}

static inline void blk_uuid_generate(blk_uuid_t *uuid)
{
	uuid_generate(uuid->uuid);
}

static inline void blk_uuid_to_string(blk_uuid_t *uuid, char *out, size_t size)
{
	(void) size;
	uuid_unparse(uuid->uuid, out);
}

static inline void blk_uuid_from_string(blk_uuid_t *uuid, const char *in)
{
	uuid_parse(in, uuid->uuid);
}

static inline void blk_uuid_copy(blk_uuid_t *dst, blk_uuid_t *src)
{
	uuid_copy(dst->uuid, src->uuid);
}

static inline void blk_uuid_clear(blk_uuid_t *uuid)
{
	uuid_clear(uuid->uuid);
}

static inline int blk_uuid_compare(blk_uuid_t *uuid1, blk_uuid_t *uuid2)
{
	return uuid_compare(uuid1->uuid, uuid2->uuid);
}

#elif defined(__NetBSD__)

#include <uuid.h>
#include <string.h>
#include <stdlib.h>

typedef uuid_t blk_uuid_t;

static inline int blk_uuid_is_nil(blk_uuid_t *uuid)
{
	uint32_t status;
	return uuid_is_nil((uuid_t *)uuid, &status);
}

static inline void blk_uuid_generate(blk_uuid_t *uuid)
{
	uint32_t status;
	uuid_create((uuid_t *)uuid, &status);
}

static inline void blk_uuid_to_string(blk_uuid_t *uuid, char *out, size_t size)
{
	uint32_t status;
	char *_out = NULL;
	uuid_to_string((uuid_t *)uuid, &_out, &status);
	strlcpy(out, _out, size);
	free(_out);
}

static inline void blk_uuid_from_string(blk_uuid_t *uuid, const char *in)
{
	uint32_t status;
	uuid_from_string(in, (uuid_t *)uuid, &status);
}

static inline void blk_uuid_copy(blk_uuid_t *dst, blk_uuid_t *src)
{
	memcpy((uuid_t *)dst, (uuid_t *)src, sizeof(uuid_t));
}

static inline void blk_uuid_clear(blk_uuid_t *uuid)
{
	memset((uuid_t *)uuid, 0, sizeof(uuid_t));
}

static inline int blk_uuid_compare(blk_uuid_t *uuid1, blk_uuid_t *uuid2)
{
	uint32_t status;
	return uuid_compare((uuid_t *)uuid1, (uuid_t *)uuid2, &status);
}

#elif defined(_WIN32)
#include <Rpc.h>
typedef UUID blk_uuid_t;

static size_t strlcpy( char *dst, const char *src,  size_t size ) {
    size_t srclen;

    size--;
    srclen = strlen( src );

    if( srclen > size )
        srclen = size;

    memcpy( dst, src, srclen );
    dst[srclen] = '\0';

    return (srclen);
}
static inline int blk_uuid_is_nil( blk_uuid_t *uuid )
{
   RPC_STATUS status;
    return UuidIsNil( (uuid_t *)uuid, &status );
}

static inline void blk_uuid_generate( blk_uuid_t *uuid )
{
    RPC_STATUS status;
    status = UuidCreate( (uuid_t *)uuid );
    if( status == RPC_S_OK || status == RPC_S_UUID_LOCAL_ONLY )
        return;
    abort();
}

static inline void blk_uuid_to_string( blk_uuid_t *uuid, char *out, size_t size )
{
    RPC_CSTR _out = NULL;
    if( UuidToString( (uuid_t *)uuid, &_out ) != RPC_S_OK )
        return;
    strlcpy( out, (const char *)_out, size );
    RpcStringFree( &_out );
    return;
}

static inline void blk_uuid_from_string( blk_uuid_t *uuid, const char *in )
{
    UuidFromString( (RPC_CSTR)in, (uuid_t *)uuid );
}

static inline void blk_uuid_copy( blk_uuid_t *dst, blk_uuid_t *src )
{
    memcpy( (uuid_t *)dst, (uuid_t *)src, sizeof( uuid_t ) );
}

static inline void blk_uuid_clear( blk_uuid_t *uuid )
{
    memset( (uuid_t *)uuid, 0, sizeof( uuid_t ) );
}

static inline int blk_uuid_compare( blk_uuid_t *uuid1, blk_uuid_t *uuid2 )
{
    RPC_STATUS status;
    return UuidCompare( (uuid_t *)uuid1, (uuid_t *)uuid2, &status );
}
#else

#error "Please update blk_uuid.h for your OS"

#endif

#endif /* __BLKTAP2_UUID_H__ */