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/*
(c) Copyright 2001-2009 The world wide DirectFB Open Source Community (directfb.org)
(c) Copyright 2000-2004 Convergence (integrated media) GmbH
All rights reserved.
Written by Denis Oliver Kropp <dok@directfb.org>,
Andreas Hundt <andi@fischlustig.de>,
Sven Neumann <neo@directfb.org>,
Ville Syrjälä <syrjala@sci.fi> and
Claudio Ciccani <klan@users.sf.net>.
This library 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 2 of the License, or (at your option) any later version.
This library 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 this library; if not, write to the
Free Software Foundation, Inc., 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA.
*/
#include <config.h>
#include <direct/debug.h>
#include <direct/mem.h>
#include <direct/memcpy.h>
#include <fusion/object.h>
#include <fusion/shmalloc.h>
#include <fusion/vector.h>
static inline bool ensure_capacity( FusionVector *vector )
{
D_MAGIC_ASSERT( vector, FusionVector );
D_ASSERT( vector->capacity > 0 );
if (!vector->elements) {
if (vector->pool)
vector->elements = SHMALLOC( vector->pool, vector->capacity * sizeof(void*) );
else
vector->elements = D_MALLOC( vector->capacity * sizeof(void*) );
if (!vector->elements)
return false;
}
else if (vector->count == vector->capacity) {
void *elements;
void *oldelements = vector->elements;
int capacity = vector->capacity << 1;
if (vector->pool)
elements = SHMALLOC( vector->pool, capacity * sizeof(void*) );
else
elements = D_MALLOC( capacity * sizeof(void*) );
if (!elements)
return false;
direct_memcpy( elements, vector->elements,
vector->count * sizeof(void*) );
vector->elements = elements;
vector->capacity = capacity;
if (vector->pool)
SHFREE( vector->pool, oldelements );
else
D_FREE( oldelements );
}
return true;
}
void
fusion_vector_init( FusionVector *vector,
int capacity,
FusionSHMPoolShared *pool )
{
D_ASSERT( vector != NULL );
D_ASSERT( capacity > 0 );
vector->elements = NULL;
vector->count = 0;
vector->capacity = capacity;
vector->pool = pool;
D_MAGIC_SET( vector, FusionVector );
}
void
fusion_vector_destroy( FusionVector *vector )
{
D_MAGIC_ASSERT( vector, FusionVector );
D_ASSERT( vector->count == 0 || vector->elements != NULL );
if (vector->elements) {
if (vector->pool)
SHFREE( vector->pool, vector->elements );
else
D_FREE( vector->elements );
vector->elements = NULL;
}
D_MAGIC_CLEAR( vector );
}
DirectResult
fusion_vector_add( FusionVector *vector,
void *element )
{
D_MAGIC_ASSERT( vector, FusionVector );
D_ASSERT( element != NULL );
/* Make sure there's a free entry left. */
if (!ensure_capacity( vector ))
return D_OOSHM();
/* Add the element to the vector. */
vector->elements[vector->count++] = element;
return DR_OK;
}
DirectResult
fusion_vector_insert( FusionVector *vector,
void *element,
int index )
{
D_MAGIC_ASSERT( vector, FusionVector );
D_ASSERT( element != NULL );
D_ASSERT( index >= 0 );
D_ASSERT( index <= vector->count );
/* Make sure there's a free entry left. */
if (!ensure_capacity( vector ))
return D_OOSHM();
/* Move elements from insertion point one up. */
memmove( &vector->elements[ index + 1 ],
&vector->elements[ index ],
(vector->count - index) * sizeof(void*) );
/* Insert the element into the vector. */
vector->elements[index] = element;
/* Increase the element counter. */
vector->count++;
return DR_OK;
}
DirectResult
fusion_vector_move( FusionVector *vector,
int from,
int to )
{
void *element;
D_MAGIC_ASSERT( vector, FusionVector );
D_ASSERT( from >= 0 );
D_ASSERT( from < vector->count );
D_ASSERT( to >= 0 );
D_ASSERT( to < vector->count );
if (to == from)
return DR_OK;
/* Save the element. */
element = vector->elements[from];
/* Move elements that lie on the way to the new position. */
if (to > from) {
/* Element is moving up -> move other elements down. */
memmove( &vector->elements[ from ],
&vector->elements[ from + 1 ],
(to - from) * sizeof(void*) );
}
else {
/* Element is moving down -> move other elements up. */
memmove( &vector->elements[ to + 1 ],
&vector->elements[ to ],
(from - to) * sizeof(void*) );
}
/* Restore the element at the new position. */
vector->elements[to] = element;
return DR_OK;
}
DirectResult
fusion_vector_remove( FusionVector *vector,
int index )
{
D_MAGIC_ASSERT( vector, FusionVector );
D_ASSERT( index >= 0 );
D_ASSERT( index < vector->count );
/* Move elements after this element one down. */
memmove( &vector->elements[ index ],
&vector->elements[ index + 1 ],
(vector->count - index - 1) * sizeof(void*) );
/* Decrease the element counter. */
vector->count--;
return DR_OK;
}
DirectResult
fusion_vector_remove_last( FusionVector *vector )
{
D_MAGIC_ASSERT( vector, FusionVector );
D_ASSERT( vector->count > 0 );
/* Decrease the element counter. */
vector->count--;
return DR_OK;
}
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