/*
 * ***** BEGIN GPL LICENSE BLOCK *****
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License
 * as published by the Free Software Foundation; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
 *
 * The Original Code is Copyright (C) 2001-2002 by NaN Holding BV.
 * All rights reserved.
 *
 * The Original Code is: all of this file.
 *
 * Contributor(s): none yet.
 *
 * ***** END GPL LICENSE BLOCK *****
 */

/** \file blender/blenkernel/intern/library.c
 *  \ingroup bke
 *
 * Contains management of ID's and libraries
 * allocate and free of all library data
 */

#include <stdio.h>
#include <ctype.h>
#include <string.h>
#include <stdlib.h>
#include <stddef.h>
#include <assert.h>

#include "MEM_guardedalloc.h"

/* all types are needed here, in order to do memory operations */
#include "DNA_anim_types.h"
#include "DNA_armature_types.h"
#include "DNA_brush_types.h"
#include "DNA_camera_types.h"
#include "DNA_group_types.h"
#include "DNA_ipo_types.h"
#include "DNA_key_types.h"
#include "DNA_lamp_types.h"
#include "DNA_lattice_types.h"
#include "DNA_material_types.h"
#include "DNA_mesh_types.h"
#include "DNA_meta_types.h"
#include "DNA_nla_types.h"
#include "DNA_node_types.h"
#include "DNA_scene_types.h"
#include "DNA_screen_types.h"
#include "DNA_speaker_types.h"
#include "DNA_sound_types.h"
#include "DNA_text_types.h"
#include "DNA_vfont_types.h"
#include "DNA_windowmanager_types.h"
#include "DNA_world_types.h"
#include "DNA_gpencil_types.h"
#include "DNA_movieclip_types.h"

#include "BLI_blenlib.h"
#include "BLI_dynstr.h"
#include "BLI_utildefines.h"
#include "BLI_bpath.h"

#include "BKE_animsys.h"
#include "BKE_camera.h"
#include "BKE_context.h"
#include "BKE_lamp.h"
#include "BKE_library.h"
#include "BKE_main.h"
#include "BKE_global.h"
#include "BKE_sound.h"
#include "BKE_object.h"
#include "BKE_screen.h"
#include "BKE_mesh.h"
#include "BKE_material.h"
#include "BKE_curve.h"
#include "BKE_mball.h"
#include "BKE_text.h"
#include "BKE_texture.h"
#include "BKE_scene.h"
#include "BKE_icons.h"
#include "BKE_image.h"
#include "BKE_ipo.h"
#include "BKE_key.h"
#include "BKE_world.h"
#include "BKE_font.h"
#include "BKE_group.h"
#include "BKE_lattice.h"
#include "BKE_armature.h"
#include "BKE_action.h"
#include "BKE_node.h"
#include "BKE_brush.h"
#include "BKE_idprop.h"
#include "BKE_particle.h"
#include "BKE_gpencil.h"
#include "BKE_fcurve.h"
#include "BKE_speaker.h"
#include "BKE_utildefines.h"
#include "BKE_movieclip.h"

#include "RNA_access.h"

#ifdef WITH_PYTHON
#include "BPY_extern.h"
#endif

#define MAX_IDPUP		60	/* was 24 */

/* GS reads the memory pointed at in a specific ordering. 
 * only use this definition, makes little and big endian systems
 * work fine, in conjunction with MAKE_ID */

/* from blendef: */
#define GS(a)	(*((short *)(a)))

/* ************* general ************************ */


/* this has to be called from each make_local_* func, we could call
 * from id_make_local() but then the make local functions would not be self
 * contained.
 * also note that the id _must_ have a library - campbell */
void BKE_id_lib_local_paths(Main *bmain, Library *lib, ID *id)
{
	char *bpath_user_data[2]= {bmain->name, lib->filepath};

	bpath_traverse_id(bmain, id,
					  bpath_relocate_visitor,
					  BPATH_TRAVERSE_SKIP_MULTIFILE,
					  bpath_user_data);
}

void id_lib_extern(ID *id)
{
	if (id) {
		if (id->flag & LIB_INDIRECT) {
			id->flag -= LIB_INDIRECT;
			id->flag |= LIB_EXTERN;
		}
	}
}

void id_us_plus(ID *id)
{
	if (id) {
		id->us++;
		if (id->flag & LIB_INDIRECT) {
			id->flag -= LIB_INDIRECT;
			id->flag |= LIB_EXTERN;
		}
	}
}

void id_us_min(ID *id)
{
	if (id) {
		if (id->us < 2 && (id->flag & LIB_FAKEUSER)) {
			id->us= 1;
		}
		else if (id->us <= 0) {
			printf("ID user decrement error: %s\n", id->name);
		}
		else {
			id->us--;
		}
	}
}

int id_make_local(ID *id, int test)
{
	if (id->flag & LIB_INDIRECT)
		return 0;

	switch (GS(id->name)) {
		case ID_SCE:
			return 0; /* not implemented */
		case ID_LI:
			return 0; /* can't be linked */
		case ID_OB:
			if (!test) make_local_object((Object*)id);
			return 1;
		case ID_ME:
			if (!test) {
				make_local_mesh((Mesh*)id);
				make_local_key(((Mesh*)id)->key);
			}
			return 1;
		case ID_CU:
			if (!test) {
				BKE_curve_make_local((Curve*)id);
				make_local_key(((Curve*)id)->key);
			}
			return 1;
		case ID_MB:
			if (!test) BKE_metaball_make_local((MetaBall*)id);
			return 1;
		case ID_MA:
			if (!test) make_local_material((Material*)id);
			return 1;
		case ID_TE:
			if (!test) make_local_texture((Tex*)id);
			return 1;
		case ID_IM:
			if (!test) make_local_image((Image*)id);
			return 1;
		case ID_LT:
			if (!test) {
				make_local_lattice((Lattice*)id);
				make_local_key(((Lattice*)id)->key);
			}
			return 1;
		case ID_LA:
			if (!test) make_local_lamp((Lamp*)id);
			return 1;
		case ID_CA:
			if (!test) make_local_camera((Camera*)id);
			return 1;
		case ID_SPK:
			if (!test) make_local_speaker((Speaker*)id);
			return 1;
		case ID_IP:
			return 0; /* deprecated */
		case ID_KE:
			if (!test) make_local_key((Key*)id);
			return 1;
		case ID_WO:
			if (!test) make_local_world((World*)id);
			return 1;
		case ID_SCR:
			return 0; /* can't be linked */
		case ID_VF:
			return 0; /* not implemented */
		case ID_TXT:
			return 0; /* not implemented */
		case ID_SCRIPT:
			return 0; /* deprecated */
		case ID_SO:
			return 0; /* not implemented */
		case ID_GR:
			return 0; /* not implemented */
		case ID_AR:
			if (!test) make_local_armature((bArmature*)id);
			return 1;
		case ID_AC:
			if (!test) make_local_action((bAction*)id);
			return 1;
		case ID_NT:
			return 0; /* not implemented */
		case ID_BR:
			if (!test) make_local_brush((Brush*)id);
			return 1;
		case ID_PA:
			if (!test) make_local_particlesettings((ParticleSettings*)id);
			return 1;
		case ID_WM:
			return 0; /* can't be linked */
		case ID_GD:
			return 0; /* not implemented */
	}

	return 0;
}

int id_copy(ID *id, ID **newid, int test)
{
	if (!test) *newid= NULL;

	/* conventions:
	 * - make shallow copy, only this ID block
	 * - id.us of the new ID is set to 1 */
	switch (GS(id->name)) {
		case ID_SCE:
			return 0; /* can't be copied from here */
		case ID_LI:
			return 0; /* can't be copied from here */
		case ID_OB:
			if (!test) *newid= (ID*)copy_object((Object*)id);
			return 1;
		case ID_ME:
			if (!test) *newid= (ID*)copy_mesh((Mesh*)id);
			return 1;
		case ID_CU:
			if (!test) *newid= (ID*)BKE_curve_copy((Curve*)id);
			return 1;
		case ID_MB:
			if (!test) *newid= (ID*)BKE_metaball_copy((MetaBall*)id);
			return 1;
		case ID_MA:
			if (!test) *newid= (ID*)copy_material((Material*)id);
			return 1;
		case ID_TE:
			if (!test) *newid= (ID*)copy_texture((Tex*)id);
			return 1;
		case ID_IM:
			if (!test) *newid= (ID*)copy_image((Image*)id);
			return 1;
		case ID_LT:
			if (!test) *newid= (ID*)copy_lattice((Lattice*)id);
			return 1;
		case ID_LA:
			if (!test) *newid= (ID*)copy_lamp((Lamp*)id);
			return 1;
		case ID_SPK:
			if (!test) *newid= (ID*)copy_speaker((Speaker*)id);
			return 1;
		case ID_CA:
			if (!test) *newid= (ID*)copy_camera((Camera*)id);
			return 1;
		case ID_IP:
			return 0; /* deprecated */
		case ID_KE:
			if (!test) *newid= (ID*)copy_key((Key*)id);
			return 1;
		case ID_WO:
			if (!test) *newid= (ID*)copy_world((World*)id);
			return 1;
		case ID_SCR:
			return 0; /* can't be copied from here */
		case ID_VF:
			return 0; /* not implemented */
		case ID_TXT:
			if (!test) *newid= (ID*)copy_text((Text*)id);
			return 1;
		case ID_SCRIPT:
			return 0; /* deprecated */
		case ID_SO:
			return 0; /* not implemented */
		case ID_GR:
			if (!test) *newid= (ID*)copy_group((Group*)id);
			return 1;
		case ID_AR:
			if (!test) *newid= (ID*)copy_armature((bArmature*)id);
			return 1;
		case ID_AC:
			if (!test) *newid= (ID*)copy_action((bAction*)id);
			return 1;
		case ID_NT:
			if (!test) *newid= (ID*)ntreeCopyTree((bNodeTree*)id);
			return 1;
		case ID_BR:
			if (!test) *newid= (ID*)copy_brush((Brush*)id);
			return 1;
		case ID_PA:
			if (!test) *newid= (ID*)psys_copy_settings((ParticleSettings*)id);
			return 1;
		case ID_WM:
			return 0; /* can't be copied from here */
		case ID_GD:
			return 0; /* not implemented */
	}
	
	return 0;
}

int id_unlink(ID *id, int test)
{
	Main *mainlib= G.main;
	ListBase *lb;

	switch (GS(id->name)) {
		case ID_TXT:
			if (test) return 1;
			unlink_text(mainlib, (Text*)id);
			break;
		case ID_GR:
			if (test) return 1;
			unlink_group((Group*)id);
			break;
		case ID_OB:
			if (test) return 1;
			unlink_object((Object*)id);
			break;
	}

	if (id->us == 0) {
		if (test) return 1;

		lb= which_libbase(mainlib, GS(id->name));
		free_libblock(lb, id);

		return 1;
	}

	return 0;
}

int id_single_user(bContext *C, ID *id, PointerRNA *ptr, PropertyRNA *prop)
{
	ID *newid = NULL;
	PointerRNA idptr;
	
	if (id) {
		/* if property isn't editable, we're going to have an extra block hanging around until we save */
		if (RNA_property_editable(ptr, prop)) {
			if (id_copy(id, &newid, 0) && newid) {
				/* copy animation actions too */
				BKE_copy_animdata_id_action(id);
				/* us is 1 by convention, but RNA_property_pointer_set
				 * will also increment it, so set it to zero */
				newid->us = 0;
				
				/* assign copy */
				RNA_id_pointer_create(newid, &idptr);
				RNA_property_pointer_set(ptr, prop, idptr);
				RNA_property_update(C, ptr, prop);
				
				return 1;
			}
		}
	}
	
	return 0;
}

ListBase *which_libbase(Main *mainlib, short type)
{
	switch ( type ) {
		case ID_SCE:
			return &(mainlib->scene);
		case ID_LI:
			return &(mainlib->library);
		case ID_OB:
			return &(mainlib->object);
		case ID_ME:
			return &(mainlib->mesh);
		case ID_CU:
			return &(mainlib->curve);
		case ID_MB:
			return &(mainlib->mball);
		case ID_MA:
			return &(mainlib->mat);
		case ID_TE:
			return &(mainlib->tex);
		case ID_IM:
			return &(mainlib->image);
		case ID_LT:
			return &(mainlib->latt);
		case ID_LA:
			return &(mainlib->lamp);
		case ID_CA:
			return &(mainlib->camera);
		case ID_IP:
			return &(mainlib->ipo);
		case ID_KE:
			return &(mainlib->key);
		case ID_WO:
			return &(mainlib->world);
		case ID_SCR:
			return &(mainlib->screen);
		case ID_VF:
			return &(mainlib->vfont);
		case ID_TXT:
			return &(mainlib->text);
		case ID_SCRIPT:
			return &(mainlib->script);
		case ID_SPK:
			return &(mainlib->speaker);
		case ID_SO:
			return &(mainlib->sound);
		case ID_GR:
			return &(mainlib->group);
		case ID_AR:
			return &(mainlib->armature);
		case ID_AC:
			return &(mainlib->action);
		case ID_NT:
			return &(mainlib->nodetree);
		case ID_BR:
			return &(mainlib->brush);
		case ID_PA:
			return &(mainlib->particle);
		case ID_WM:
			return &(mainlib->wm);
		case ID_GD:
			return &(mainlib->gpencil);
		case ID_MC:
			return &(mainlib->movieclip);
	}
	return NULL;
}

/* Flag all ids in listbase */
void flag_listbase_ids(ListBase *lb, short flag, short value)
{
	ID *id;
	if (value) {
		for (id= lb->first; id; id= id->next) id->flag |= flag;
	}
	else {
		flag = ~flag;
		for (id= lb->first; id; id= id->next) id->flag &= flag;
	}
}

/* Flag all ids in listbase */
void flag_all_listbases_ids(short flag, short value)
{
	ListBase *lbarray[MAX_LIBARRAY];
	int a;
	a= set_listbasepointers(G.main, lbarray);
	while (a--)	flag_listbase_ids(lbarray[a], flag, value);
}

void recalc_all_library_objects(Main *main)
{
	Object *ob;

	/* flag for full recalc */
	for (ob=main->object.first; ob; ob=ob->id.next)
		if (ob->id.lib)
			ob->recalc |= OB_RECALC_OB|OB_RECALC_DATA|OB_RECALC_TIME;
}

/* note: MAX_LIBARRAY define should match this code */
int set_listbasepointers(Main *main, ListBase **lb)
{
	int a = 0;

	/* BACKWARDS! also watch order of free-ing! (mesh<->mat), first items freed last.
	 * This is important because freeing data decreases usercounts of other datablocks,
	 * if this data is its self freed it can crash. */
	lb[a++]= &(main->ipo);
	lb[a++]= &(main->action); // xxx moved here to avoid problems when freeing with animato (aligorith)
	lb[a++]= &(main->key);
	lb[a++]= &(main->gpencil); /* referenced by nodes, objects, view, scene etc, before to free after. */
	lb[a++]= &(main->nodetree);
	lb[a++]= &(main->image);
	lb[a++]= &(main->tex);
	lb[a++]= &(main->mat);
	lb[a++]= &(main->vfont);
	
	/* Important!: When adding a new object type,
	 * the specific data should be inserted here 
	 */

	lb[a++]= &(main->armature);

	lb[a++]= &(main->mesh);
	lb[a++]= &(main->curve);
	lb[a++]= &(main->mball);

	lb[a++]= &(main->latt);
	lb[a++]= &(main->lamp);
	lb[a++]= &(main->camera);

	lb[a++]= &(main->text);
	lb[a++]= &(main->sound);
	lb[a++]= &(main->group);
	lb[a++]= &(main->brush);
	lb[a++]= &(main->script);
	lb[a++]= &(main->particle);
	lb[a++]= &(main->speaker);

	lb[a++]= &(main->world);
	lb[a++]= &(main->screen);
	lb[a++]= &(main->object);
	lb[a++]= &(main->scene);
	lb[a++]= &(main->library);
	lb[a++]= &(main->wm);
	lb[a++]= &(main->movieclip);
	
	lb[a]= NULL;

	return a;
}

/* *********** ALLOC AND FREE *****************
 *
 * free_libblock(ListBase *lb, ID *id )
 * provide a list-basis and datablock, but only ID is read
 *
 * void *alloc_libblock(ListBase *lb, type, name)
 * inserts in list and returns a new ID
 *
 * **************************** */

static ID *alloc_libblock_notest(short type)
{
	ID *id= NULL;
	
	switch ( type ) {
		case ID_SCE:
			id= MEM_callocN(sizeof(Scene), "scene");
			break;
		case ID_LI:
			id= MEM_callocN(sizeof(Library), "library");
			break;
		case ID_OB:
			id= MEM_callocN(sizeof(Object), "object");
			break;
		case ID_ME:
			id= MEM_callocN(sizeof(Mesh), "mesh");
			break;
		case ID_CU:
			id= MEM_callocN(sizeof(Curve), "curve");
			break;
		case ID_MB:
			id= MEM_callocN(sizeof(MetaBall), "mball");
			break;
		case ID_MA:
			id= MEM_callocN(sizeof(Material), "mat");
			break;
		case ID_TE:
			id= MEM_callocN(sizeof(Tex), "tex");
			break;
		case ID_IM:
			id= MEM_callocN(sizeof(Image), "image");
			break;
		case ID_LT:
			id= MEM_callocN(sizeof(Lattice), "latt");
			break;
		case ID_LA:
			id= MEM_callocN(sizeof(Lamp), "lamp");
			break;
		case ID_CA:
			id= MEM_callocN(sizeof(Camera), "camera");
			break;
		case ID_IP:
			id= MEM_callocN(sizeof(Ipo), "ipo");
			break;
		case ID_KE:
			id= MEM_callocN(sizeof(Key), "key");
			break;
		case ID_WO:
			id= MEM_callocN(sizeof(World), "world");
			break;
		case ID_SCR:
			id= MEM_callocN(sizeof(bScreen), "screen");
			break;
		case ID_VF:
			id= MEM_callocN(sizeof(VFont), "vfont");
			break;
		case ID_TXT:
			id= MEM_callocN(sizeof(Text), "text");
			break;
		case ID_SCRIPT:
			//XXX id= MEM_callocN(sizeof(Script), "script");
			break;
		case ID_SPK:
			id= MEM_callocN(sizeof(Speaker), "speaker");
			break;
		case ID_SO:
			id= MEM_callocN(sizeof(bSound), "sound");
			break;
		case ID_GR:
			id= MEM_callocN(sizeof(Group), "group");
			break;
		case ID_AR:
			id = MEM_callocN(sizeof(bArmature), "armature");
			break;
		case ID_AC:
			id = MEM_callocN(sizeof(bAction), "action");
			break;
		case ID_NT:
			id = MEM_callocN(sizeof(bNodeTree), "nodetree");
			break;
		case ID_BR:
			id = MEM_callocN(sizeof(Brush), "brush");
			break;
		case ID_PA:
			id = MEM_callocN(sizeof(ParticleSettings), "ParticleSettings");
			break;
		case ID_WM:
			id = MEM_callocN(sizeof(wmWindowManager), "Window manager");
			break;
		case ID_GD:
			id = MEM_callocN(sizeof(bGPdata), "Grease Pencil");
			break;
		case ID_MC:
			id = MEM_callocN(sizeof(MovieClip), "Movie Clip");
			break;
	}
	return id;
}

/* used everywhere in blenkernel and text.c */
void *alloc_libblock(ListBase *lb, short type, const char *name)
{
	ID *id= NULL;
	
	id= alloc_libblock_notest(type);
	if (id) {
		BLI_addtail(lb, id);
		id->us= 1;
		id->icon_id = 0;
		*( (short *)id->name )= type;
		new_id(lb, id, name);
		/* alphabetic insterion: is in new_id */
	}
	return id;
}

/* by spec, animdata is first item after ID */
/* and, trust that BKE_animdata_from_id() will only find AnimData for valid ID-types */
static void id_copy_animdata(ID *id, const short do_action)
{
	AnimData *adt= BKE_animdata_from_id(id);
	
	if (adt) {
		IdAdtTemplate *iat = (IdAdtTemplate *)id;
		iat->adt= BKE_copy_animdata(iat->adt, do_action); /* could be set to FALSE, need to investigate */
	}
}

/* material nodes use this since they are not treated as libdata */
void copy_libblock_data(ID *id, const ID *id_from, const short do_action)
{
	if (id_from->properties)
		id->properties = IDP_CopyProperty(id_from->properties);

	/* the duplicate should get a copy of the animdata */
	id_copy_animdata(id, do_action);
}

/* used everywhere in blenkernel */
void *copy_libblock(ID *id)
{
	ID *idn;
	ListBase *lb;
	size_t idn_len;

	lb= which_libbase(G.main, GS(id->name));
	idn= alloc_libblock(lb, GS(id->name), id->name+2);

	assert(idn != NULL);

	idn_len= MEM_allocN_len(idn);
	if ((int)idn_len - (int)sizeof(ID) > 0) { /* signed to allow neg result */
		const char *cp= (const char *)id;
		char *cpn= (char *)idn;

		memcpy(cpn+sizeof(ID), cp+sizeof(ID), idn_len - sizeof(ID));
	}
	
	id->newid= idn;
	idn->flag |= LIB_NEW;

	copy_libblock_data(idn, id, FALSE);
	
	return idn;
}

static void free_library(Library *UNUSED(lib))
{
	/* no freeing needed for libraries yet */
}

static void (*free_windowmanager_cb)(bContext *, wmWindowManager *)= NULL;

void set_free_windowmanager_cb(void (*func)(bContext *C, wmWindowManager *) )
{
	free_windowmanager_cb= func;
}

static void animdata_dtar_clear_cb(ID *UNUSED(id), AnimData *adt, void *userdata)
{
	ChannelDriver *driver;
	FCurve *fcu;

	/* find the driver this belongs to and update it */
	for (fcu=adt->drivers.first; fcu; fcu=fcu->next) {
		driver= fcu->driver;
		
		if (driver) {
			DriverVar *dvar;
			for (dvar= driver->variables.first; dvar; dvar= dvar->next) {
				DRIVER_TARGETS_USED_LOOPER(dvar) 
				{
					if (dtar->id == userdata)
						dtar->id= NULL;
				}
				DRIVER_TARGETS_LOOPER_END
			}
		}
	}
}


/* used in headerbuttons.c image.c mesh.c screen.c sound.c and library.c */
void free_libblock(ListBase *lb, void *idv)
{
	ID *id= idv;

#ifdef WITH_PYTHON
	BPY_id_release(id);
#endif

	switch ( GS(id->name) ) {	/* GetShort from util.h */
		case ID_SCE:
			free_scene((Scene *)id);
			break;
		case ID_LI:
			free_library((Library *)id);
			break;
		case ID_OB:
			free_object((Object *)id);
			break;
		case ID_ME:
			free_mesh((Mesh *)id, 1);
			break;
		case ID_CU:
			BKE_curve_free((Curve *)id);
			break;
		case ID_MB:
			BKE_metaball_free((MetaBall *)id);
			break;
		case ID_MA:
			free_material((Material *)id);
			break;
		case ID_TE:
			free_texture((Tex *)id);
			break;
		case ID_IM:
			free_image((Image *)id);
			break;
		case ID_LT:
			free_lattice((Lattice *)id);
			break;
		case ID_LA:
			free_lamp((Lamp *)id);
			break;
		case ID_CA:
			free_camera((Camera*) id);
			break;
		case ID_IP:
			free_ipo((Ipo *)id);
			break;
		case ID_KE:
			free_key((Key *)id);
			break;
		case ID_WO:
			free_world((World *)id);
			break;
		case ID_SCR:
			free_screen((bScreen *)id);
			break;
		case ID_VF:
			free_vfont((VFont *)id);
			break;
		case ID_TXT:
			free_text((Text *)id);
			break;
		case ID_SCRIPT:
			//XXX free_script((Script *)id);
			break;
		case ID_SPK:
			free_speaker((Speaker *)id);
			break;
		case ID_SO:
			sound_free((bSound*)id);
			break;
		case ID_GR:
			free_group_objects((Group *)id);
			break;
		case ID_AR:
			free_armature((bArmature *)id);
			break;
		case ID_AC:
			free_action((bAction *)id);
			break;
		case ID_NT:
			ntreeFreeTree((bNodeTree *)id);
			break;
		case ID_BR:
			free_brush((Brush *)id);
			break;
		case ID_PA:
			psys_free_settings((ParticleSettings *)id);
			break;
		case ID_WM:
			if (free_windowmanager_cb)
				free_windowmanager_cb(NULL, (wmWindowManager *)id);
			break;
		case ID_GD:
			free_gpencil_data((bGPdata *)id);
			break;
		case ID_MC:
			BKE_movieclip_free((MovieClip *)id);
			break;
	}

	if (id->properties) {
		IDP_FreeProperty(id->properties);
		MEM_freeN(id->properties);
	}

	BLI_remlink(lb, id);

	/* this ID may be a driver target! */
	BKE_animdata_main_cb(G.main, animdata_dtar_clear_cb, (void *)id);

	MEM_freeN(id);
}

void free_libblock_us(ListBase *lb, void *idv)		/* test users */
{
	ID *id= idv;
	
	id->us--;

	if (id->us<0) {
		if (id->lib) printf("ERROR block %s %s users %d\n", id->lib->name, id->name, id->us);
		else printf("ERROR block %s users %d\n", id->name, id->us);
	}
	if (id->us==0) {
		if ( GS(id->name)==ID_OB ) unlink_object((Object *)id);
		
		free_libblock(lb, id);
	}
}


void free_main(Main *mainvar)
{
	/* also call when reading a file, erase all, etc */
	ListBase *lbarray[MAX_LIBARRAY];
	int a;

	a= set_listbasepointers(mainvar, lbarray);
	while (a--) {
		ListBase *lb= lbarray[a];
		ID *id;
		
		while ( (id= lb->first) ) {
			free_libblock(lb, id);
		}
	}

	MEM_freeN(mainvar);
}

/* ***************** ID ************************ */


ID *find_id(const char *type, const char *name)		/* type: "OB" or "MA" etc */
{
	ListBase *lb= which_libbase(G.main, GS(type));
	return BLI_findstring(lb, name, offsetof(ID, name) + 2);
}

static void get_flags_for_id(ID *id, char *buf) 
{
	int isfake= id->flag & LIB_FAKEUSER;
	int isnode=0;
		/* Writeout the flags for the entry, note there
		 * is a small hack that writes 5 spaces instead
		 * of 4 if no flags are displayed... this makes
		 * things usually line up ok - better would be
		 * to have that explicit, oh well - zr
		 */

	if (GS(id->name)==ID_MA)
		isnode= ((Material *)id)->use_nodes;
	if (GS(id->name)==ID_TE)
		isnode= ((Tex *)id)->use_nodes;
	
	if (id->us<0)
		strcpy(buf, "-1W ");
	else if (!id->lib && !isfake && id->us && !isnode)
		strcpy(buf, "     ");
	else if (isnode)
		sprintf(buf, "%c%cN%c ", id->lib?'L':' ', isfake?'F':' ', (id->us==0)?'O':' ');
	else
		sprintf(buf, "%c%c%c ", id->lib?'L':' ', isfake?'F':' ', (id->us==0)?'O':' ');
}

#define IDPUP_NO_VIEWER 1

static void IDnames_to_dyn_pupstring(DynStr *pupds, ListBase *lb, ID *link, short *nr, int hideflag)
{
	int i, nids= BLI_countlist(lb);
		
	if (nr) *nr= -1;
	
	if (nr && nids>MAX_IDPUP) {
		BLI_dynstr_append(pupds, "DataBrowse %x-2");
		*nr= -2;
	}
	else {
		ID *id;
		
		for (i=0, id= lb->first; id; id= id->next, i++) {
			char numstr[32];
			
			if (nr && id==link) *nr= i+1;

			if (U.uiflag & USER_HIDE_DOT && id->name[2]=='.')
				continue;
			if (hideflag & IDPUP_NO_VIEWER)
				if (GS(id->name)==ID_IM)
					if ( ((Image *)id)->source==IMA_SRC_VIEWER )
						continue;
			
			get_flags_for_id(id, numstr);
				
			BLI_dynstr_append(pupds, numstr);
			BLI_dynstr_append(pupds, id->name+2);
			BLI_snprintf(numstr, sizeof(numstr), "%%x%d", i+1);
			BLI_dynstr_append(pupds, numstr);
			
			/* icon */
			switch (GS(id->name)) {
			case ID_MA: /* fall through */
			case ID_TE: /* fall through */
			case ID_IM: /* fall through */
			case ID_WO: /* fall through */
			case ID_LA: /* fall through */
				BLI_snprintf(numstr, sizeof(numstr), "%%i%d", BKE_icon_getid(id) );
				BLI_dynstr_append(pupds, numstr);
				break;
			default:
				break;
			}
			
			if (id->next)
				BLI_dynstr_append(pupds, "|");
		}
	}
}


/* used by headerbuttons.c buttons.c editobject.c editseq.c */
/* if nr==NULL no MAX_IDPUP, this for non-header browsing */
void IDnames_to_pupstring(const char **str, const char *title, const char *extraops, ListBase *lb, ID *link, short *nr)
{
	DynStr *pupds= BLI_dynstr_new();

	if (title) {
		BLI_dynstr_append(pupds, title);
		BLI_dynstr_append(pupds, "%t|");
	}
	
	if (extraops) {
		BLI_dynstr_append(pupds, extraops);
		if (BLI_dynstr_get_len(pupds))
			BLI_dynstr_append(pupds, "|");
	}

	IDnames_to_dyn_pupstring(pupds, lb, link, nr, 0);
	
	*str= BLI_dynstr_get_cstring(pupds);
	BLI_dynstr_free(pupds);
}

/* skips viewer images */
#if 0 /* unused */
void IMAnames_to_pupstring(const char **str, const char *title, const char *extraops, ListBase *lb, ID *link, short *nr)
{
	DynStr *pupds= BLI_dynstr_new();
	
	if (title) {
		BLI_dynstr_append(pupds, title);
		BLI_dynstr_append(pupds, "%t|");
	}
	
	if (extraops) {
		BLI_dynstr_append(pupds, extraops);
		if (BLI_dynstr_get_len(pupds))
			BLI_dynstr_append(pupds, "|");
	}
	
	IDnames_to_dyn_pupstring(pupds, lb, link, nr, IDPUP_NO_VIEWER);
	
	*str= BLI_dynstr_get_cstring(pupds);
	BLI_dynstr_free(pupds);
}
#endif

void id_sort_by_name(ListBase *lb, ID *id)
{
	ID *idtest;
	
	/* insert alphabetically */
	if (lb->first!=lb->last) {
		BLI_remlink(lb, id);
		
		idtest= lb->first;
		while (idtest) {
			if (BLI_strcasecmp(idtest->name, id->name)>0 || (idtest->lib && !id->lib)) {
				BLI_insertlinkbefore(lb, idtest, id);
				break;
			}
			idtest= idtest->next;
		}
		/* as last */
		if (idtest==NULL) {
			BLI_addtail(lb, id);
		}
	}
	
}

/*
 * Check to see if there is an ID with the same name as 'name'.
 * Returns the ID if so, if not, returns NULL
 */
static ID *is_dupid(ListBase *lb, ID *id, const char *name)
{
	ID *idtest=NULL;
	
	for ( idtest = lb->first; idtest; idtest = idtest->next ) {
		/* if idtest is not a lib */ 
		if ( id != idtest && idtest->lib == NULL ) {
			/* do not test alphabetic! */
			/* optimized */
			if ( idtest->name[2] == name[0] ) {
				if (strcmp(name, idtest->name+2)==0) break;
			}
		}
	}
	
	return idtest;
}

/* 
 * Check to see if an ID name is already used, and find a new one if so.
 * Return 1 if created a new name (returned in name).
 *
 * Normally the ID that's being check is already in the ListBase, so ID *id
 * points at the new entry.  The Python Library module needs to know what
 * the name of a datablock will be before it is appended; in this case ID *id
 * id is NULL;
 */

static int check_for_dupid(ListBase *lb, ID *id, char *name)
{
	ID *idtest;
	int nr= 0, nrtest, a, left_len;
	char in_use[64]; /* use as a boolean array, unrelated to name length */

	char left[MAX_ID_NAME + 8], leftest[MAX_ID_NAME + 8];

	/* make sure input name is terminated properly */
	/* if ( strlen(name) > MAX_ID_NAME-3 ) name[MAX_ID_NAME-3]= 0; */
	/* removed since this is only ever called from one place - campbell */

	while (1) {

		/* phase 1: id already exists? */
		idtest = is_dupid(lb, id, name);

		/* if there is no double, done */
		if ( idtest == NULL ) return 0;

		/* we have a dup; need to make a new name */
		/* quick check so we can reuse one of first 64 ids if vacant */
		memset(in_use, 0, sizeof(in_use));

		/* get name portion, number portion ("name.number") */
		left_len= BLI_split_name_num(left, &nr, name, '.');

		/* if new name will be too long, truncate it */
		if (nr > 999 && left_len > (MAX_ID_NAME - 8)) {
			left[MAX_ID_NAME - 8]= 0;
			left_len= MAX_ID_NAME - 8;
		}
		else if (left_len > (MAX_ID_NAME - 7)) {
			left[MAX_ID_NAME - 7]= 0;
			left_len= MAX_ID_NAME - 7;
		}

		for (idtest= lb->first; idtest; idtest= idtest->next) {
			if (		(id != idtest) &&
					(idtest->lib == NULL) &&
					(*name == *(idtest->name+2)) &&
					(strncmp(name, idtest->name+2, left_len)==0) &&
					(BLI_split_name_num(leftest, &nrtest, idtest->name+2, '.') == left_len)
			) {
				if (nrtest < sizeof(in_use))
					in_use[nrtest]= 1;	/* mark as used */
				if (nr <= nrtest)
					nr= nrtest+1;		/* track largest unused */
			}
		}

		/* decide which value of nr to use */
		for (a=0; a < sizeof(in_use); a++) {
			if (a>=nr) break;	/* stop when we've check up to biggest */
			if ( in_use[a]==0 ) { /* found an unused value */
				nr = a;
				break;
			}
		}

		/* If the original name has no numeric suffix, 
		 * rather than just chopping and adding numbers, 
		 * shave off the end chars until we have a unique name.
		 * Check the null terminators match as well so we don't get Cube.000 -> Cube.00 */
		if (nr==0 && name[left_len]== '\0') {
			int len = left_len-1;
			idtest= is_dupid(lb, id, name);
			
			while (idtest && len> 1) {
				name[len--] = '\0';
				idtest= is_dupid(lb, id, name);
			}
			if (idtest == NULL) return 1;
			/* otherwise just continue and use a number suffix */
		}
		
		if (nr > 999 && left_len > (MAX_ID_NAME - 8)) {
			/* this would overflow name buffer */
			left[MAX_ID_NAME - 8] = 0;
			/* left_len = MAX_ID_NAME - 8; */ /* for now this isn't used again */
			memcpy(name, left, sizeof(char) * (MAX_ID_NAME - 7));
			continue;
		}
		/* this format specifier is from hell... */
		BLI_snprintf(name, sizeof(id->name) - 2, "%s.%.3d", left, nr);

		return 1;
	}
}

/*
 * Only for local blocks: external en indirect blocks already have a
 * unique ID.
 *
 * return 1: created a new name
 */

int new_id(ListBase *lb, ID *id, const char *tname)
{
	int result;
	char name[MAX_ID_NAME-2];

	/* if library, don't rename */
	if (id->lib) return 0;

	/* if no libdata given, look up based on ID */
	if (lb==NULL) lb= which_libbase(G.main, GS(id->name));

	/* if no name given, use name of current ID
	 * else make a copy (tname args can be const) */
	if (tname==NULL)
		tname= id->name+2;

	strncpy(name, tname, sizeof(name)-1);

	/* if result > MAX_ID_NAME-3, strncpy don't put the final '\0' to name.
	 * easier to assign each time then to check if its needed */
	name[sizeof(name)-1]= 0;

	if (name[0] == '\0') {
		/* disallow empty names */
		strcpy(name, ID_FALLBACK_NAME);
	}
	else {
		/* disallow non utf8 chars,
		 * the interface checks for this but new ID's based on file names don't */
		BLI_utf8_invalid_strip(name, strlen(name));
	}

	result = check_for_dupid(lb, id, name);
	strcpy(id->name+2, name);

	/* This was in 2.43 and previous releases
	 * however all data in blender should be sorted, not just duplicate names
	 * sorting should not hurt, but noting just incause it alters the way other
	 * functions work, so sort every time */
#if 0
	if ( result )
		id_sort_by_name(lb, id);
#endif

	id_sort_by_name(lb, id);
	
	return result;
}

/* Pull an ID out of a library (make it local). Only call this for IDs that
 * don't have other library users. */
void id_clear_lib_data(Main *bmain, ID *id)
{
	BKE_id_lib_local_paths(bmain, id->lib, id);

	id->lib= NULL;
	id->flag= LIB_LOCAL;
	new_id(which_libbase(bmain, GS(id->name)), id, NULL);
}

/* next to indirect usage in read/writefile also in editobject.c scene.c */
void clear_id_newpoins(void)
{
	ListBase *lbarray[MAX_LIBARRAY];
	ID *id;
	int a;

	a= set_listbasepointers(G.main, lbarray);
	while (a--) {
		id= lbarray[a]->first;
		while (id) {
			id->newid= NULL;
			id->flag &= ~LIB_NEW;
			id= id->next;
		}
	}
}

#define LIBTAG(a)	if (a && a->id.lib) {a->id.flag &=~LIB_INDIRECT; a->id.flag |= LIB_EXTERN;}

static void lib_indirect_test_id(ID *id, Library *lib)
{
	
	if (id->lib) {
		/* datablocks that were indirectly related are now direct links
		 * without this, appending data that has a link to other data will fail to write */
		if (lib && id->lib->parent == lib) {
			id_lib_extern(id);
		}
		return;
	}
	
	if (GS(id->name)==ID_OB) {		
		Object *ob= (Object *)id;
		Mesh *me;

		int a;

#if 0	/* XXX OLD ANIMSYS, NLASTRIPS ARE NO LONGER USED */
		// XXX old animation system! --------------------------------------
		{
			bActionStrip *strip;
			for (strip=ob->nlastrips.first; strip; strip=strip->next) {
				LIBTAG(strip->object);
				LIBTAG(strip->act);
				LIBTAG(strip->ipo);
			}
		}
		// XXX: new animation system needs something like this?
#endif

		for (a=0; a<ob->totcol; a++) {
			LIBTAG(ob->mat[a]);
		}
	
		LIBTAG(ob->dup_group);
		LIBTAG(ob->proxy);
		
		me= ob->data;
		LIBTAG(me);
	}
}

void tag_main_lb(ListBase *lb, const short tag)
{
	ID *id;
	if (tag) {
		for (id= lb->first; id; id= id->next) {
			id->flag |= LIB_DOIT;
		}
	}
	else {
		for (id= lb->first; id; id= id->next) {
			id->flag &= ~LIB_DOIT;
		}
	}
}

void tag_main_idcode(struct Main *mainvar, const short type, const short tag)
{
	ListBase *lb= which_libbase(mainvar, type);

	tag_main_lb(lb, tag);
}

void tag_main(struct Main *mainvar, const short tag)
{
	ListBase *lbarray[MAX_LIBARRAY];
	int a;

	a= set_listbasepointers(mainvar, lbarray);
	while (a--) {
		tag_main_lb(lbarray[a], tag);
	}
}

/* if lib!=NULL, only all from lib local
 * bmain is almost certainly G.main */
void BKE_library_make_local(Main *bmain, Library *lib, int untagged_only)
{
	ListBase *lbarray[MAX_LIBARRAY], tempbase={NULL, NULL};
	ID *id, *idn;
	int a;

	a= set_listbasepointers(bmain, lbarray);
	while (a--) {
		id= lbarray[a]->first;
		
		while (id) {
			id->newid= NULL;
			idn= id->next;		/* id is possibly being inserted again */
			
			/* The check on the second line (LIB_PRE_EXISTING) is done so its
			 * possible to tag data you don't want to be made local, used for
			 * appending data, so any libdata already linked wont become local
			 * (very nasty to discover all your links are lost after appending)  
			 * */
			if (id->flag & (LIB_EXTERN|LIB_INDIRECT|LIB_NEW) &&
			  (untagged_only==0 || !(id->flag & LIB_PRE_EXISTING)))
			{
				if (lib==NULL || id->lib==lib) {
					if (id->lib) {
						id_clear_lib_data(bmain, id); /* sets 'id->flag' */

						/* why sort alphabetically here but not in
						 * id_clear_lib_data() ? - campbell */
						id_sort_by_name(lbarray[a], id);
					}
					else {
						id->flag &= ~(LIB_EXTERN|LIB_INDIRECT|LIB_NEW);
					}
				}
			}
			id= idn;
		}
		
		/* patch2: make it aphabetically */
		while ( (id=tempbase.first) ) {
			BLI_remlink(&tempbase, id);
			BLI_addtail(lbarray[a], id);
			new_id(lbarray[a], id, NULL);
		}
	}

	/* patch 3: make sure library data isn't indirect falsely... */
	a= set_listbasepointers(bmain, lbarray);
	while (a--) {
		for (id= lbarray[a]->first; id; id=id->next)
			lib_indirect_test_id(id, lib);
	}
}


void test_idbutton(char *name)
{
	/* called from buttons: when name already exists: call new_id */
	ListBase *lb;
	ID *idtest;
	

	lb= which_libbase(G.main, GS(name-2) );
	if (lb==NULL) return;
	
	/* search for id */
	idtest= BLI_findstring(lb, name, offsetof(ID, name) + 2);

	if (idtest) if ( new_id(lb, idtest, name)==0 ) id_sort_by_name(lb, idtest);
}

void text_idbutton(struct ID *id, char *text)
{
	if (id) {
		if (GS(id->name)==ID_SCE)
			strcpy(text, "SCE: ");
		else if (GS(id->name)==ID_SCR)
			strcpy(text, "SCR: ");
		else if (GS(id->name)==ID_MA && ((Material*)id)->use_nodes)
			strcpy(text, "NT: ");
		else {
			text[0]= id->name[0];
			text[1]= id->name[1];
			text[2]= ':';
			text[3]= ' ';
			text[4]= 0;
		}
	}
	else {
		text[0]= '\0';
	}
}

void rename_id(ID *id, const char *name)
{
	ListBase *lb;

	BLI_strncpy(id->name+2, name, sizeof(id->name)-2);
	lb= which_libbase(G.main, GS(id->name) );
	
	new_id(lb, id, name);				
}

void name_uiprefix_id(char *name, ID *id)
{
	name[0] = id->lib ? 'L':' ';
	name[1] = id->flag & LIB_FAKEUSER ? 'F': (id->us==0)?'0':' ';
	name[2] = ' ';

	strcpy(name+3, id->name+2);
}

void BKE_library_filepath_set(Library *lib, const char *filepath)
{
	/* in some cases this is used to update the absolute path from the
	 * relative */
	if (lib->name != filepath) {
		BLI_strncpy(lib->name, filepath, sizeof(lib->name));
	}

	BLI_strncpy(lib->filepath, filepath, sizeof(lib->filepath));

	/* not essential but set filepath is an absolute copy of value which
	 * is more useful if its kept in sync */
	if (strncmp(lib->filepath, "//", 2) == 0) {
		/* note that the file may be unsaved, in this case, setting the
		 * filepath on an indirectly linked path is not allowed from the
		 * outliner, and its not really supported but allow from here for now
		 * since making local could cause this to be directly linked - campbell
		 */
		const char *basepath= lib->parent ? lib->parent->filepath : G.main->name;
		BLI_path_abs(lib->filepath, basepath);
	}
}