code cleanup: more confusion with 0/NULL/false

source/blender/blenkernel/intern/DerivedMesh.c

@@ -2635,9 +2635,9 @@ void DM_add_tangent_layer(DerivedMesh *dm)
 	
 	/* new computation method */
 	{
-		SGLSLMeshToTangent mesh2tangent = {0};
-		SMikkTSpaceContext sContext = {0};
-		SMikkTSpaceInterface sInterface = {0};
+		SGLSLMeshToTangent mesh2tangent = {NULL};
+		SMikkTSpaceContext sContext = {NULL};
+		SMikkTSpaceInterface sInterface = {NULL};
 
 		mesh2tangent.precomputedFaceNormals = nors;
 		mesh2tangent.mtface = mtface;

source/blender/blenkernel/intern/editderivedmesh.c

@@ -1064,7 +1064,7 @@ static void emDM_drawMappedFacesMat(DerivedMesh *dm,
 	const float (*vertexNos)[3];
 	const float (*polyNos)[3];
 	BMFace *efa;
-	DMVertexAttribs attribs = {{{0}}};
+	DMVertexAttribs attribs = {{{NULL}}};
 	GPUVertexAttribs gattribs;
 	int i, matnr, new_matnr;
 

source/blender/blenkernel/intern/key.c

@@ -190,7 +190,8 @@ Key *BKE_key_copy_nolib(Key *key)
 	Key *keyn;
 	KeyBlock *kbn, *kb;
 	
-	if (key == 0) return 0;
+	if (key == NULL)
+		return NULL;
 	
 	keyn = MEM_dupallocN(key);
 

source/blender/blenkernel/intern/multires.c

@@ -245,7 +245,7 @@ static void multires_mdisps_subdivide_hidden(MDisps *md, int new_level)
 static MDisps *multires_mdisps_initialize_hidden(Mesh *me, int level)
 {
 	MDisps *mdisps = CustomData_add_layer(&me->ldata, CD_MDISPS,
-	                                      CD_CALLOC, 0, me->totloop);
+	                                      CD_CALLOC, NULL, me->totloop);
 	int gridsize = ccg_gridsize(level);
 	int gridarea = gridsize * gridsize;
 	int i, j, k;

source/blender/blenkernel/intern/pbvh.c

@@ -838,12 +838,12 @@ static void free_tree(node_tree *tree)
 {
 	if (tree->left) {
 		free_tree(tree->left);
-		tree->left = 0;
+		tree->left = NULL;
 	}
 
 	if (tree->right) {
 		free_tree(tree->right);
-		tree->right = 0;
+		tree->right = NULL;
 	}
 
 	free(tree);
@@ -860,7 +860,7 @@ static void BKE_pbvh_search_callback_occluded(PBVH *bvh,
 {
 	PBVHIter iter;
 	PBVHNode *node;
-	node_tree *tree = 0;
+	node_tree *tree = NULL;
 
 	pbvh_iter_begin(&iter, bvh, scb, search_data);
 
@@ -1356,7 +1356,7 @@ void BKE_pbvh_node_get_proxies(PBVHNode *node, PBVHProxyNode **proxies, int *pro
 		if (proxy_count) *proxy_count = node->proxy_count;
 	}
 	else {
-		if (proxies) *proxies = 0;
+		if (proxies) *proxies = NULL;
 		if (proxy_count) *proxy_count = 0;
 	}
 }
@@ -1788,11 +1788,11 @@ void BKE_pbvh_node_free_proxies(PBVHNode *node)
 
 		for (p = 0; p < node->proxy_count; p++) {
 			MEM_freeN(node->proxies[p].co);
-			node->proxies[p].co = 0;
+			node->proxies[p].co = NULL;
 		}
 
 		MEM_freeN(node->proxies);
-		node->proxies = 0;
+		node->proxies = NULL;
 
 		node->proxy_count = 0;
 	}
@@ -1836,10 +1836,10 @@ void pbvh_vertex_iter_init(PBVH *bvh, PBVHNode *node,
 	int *grid_indices, *vert_indices;
 	int totgrid, gridsize, uniq_verts, totvert;
 	
-	vi->grid = 0;
-	vi->no = 0;
-	vi->fno = 0;
-	vi->mvert = 0;
+	vi->grid = NULL;
+	vi->no = NULL;
+	vi->fno = NULL;
+	vi->mvert = NULL;
 	
 	BKE_pbvh_node_get_grids(bvh, node, &grid_indices, &totgrid, NULL, &gridsize, &grids, NULL);
 	BKE_pbvh_node_num_verts(bvh, node, &uniq_verts, &totvert);

source/blender/blenkernel/intern/subsurf_ccg.c

@@ -3139,7 +3139,7 @@ static CCGDerivedMesh *getCCGDerivedMesh(CCGSubSurf *ss,
 	int numTex, numCol;
 	int hasPCol, hasOrigSpace;
 	int gridInternalEdges;
-	WeightTable wtable = {0};
+	WeightTable wtable = {NULL};
 	/* MCol *mcol; */ /* UNUSED */
 	MEdge *medge = NULL;
 	/* MFace *mface = NULL; */

source/blender/blenlib/BLI_buffer.h

@@ -57,7 +57,7 @@ enum {
 	BLI_Buffer name_ = { \
 	/* clear the static memory if this is a calloc'd array */ \
 	((void)((flag_ & BLI_BUFFER_USE_CALLOC) ? \
-	          memset(name_ ## _static_, 0, sizeof(name_ ## _static_)) : 0\
+	          memset(name_ ## _static_, 0, sizeof(name_ ## _static_)) : NULL \
 	), /* memset-end */ \
 	                    name_ ## _static_), \
 	                    sizeof(type_), \

source/blender/bmesh/operators/bmo_smooth_laplacian.c

@@ -220,7 +220,7 @@ static void init_laplacian_matrix(LaplacianSystem *sys)
 			v1 = vf[0]->co;
 			v2 = vf[1]->co;
 			v3 = vf[2]->co;
-			v4 = has_4_vert ? vf[3]->co : 0;
+			v4 = has_4_vert ? vf[3]->co : NULL;
 
 			if (has_4_vert) {
 				areaf = area_quad_v3(v1, v2, v3, v4);

source/blender/bmesh/tools/bmesh_decimate_collapse.c

@@ -345,7 +345,7 @@ static bool bm_decim_triangulate_begin(BMesh *bm)
 			}
 
 #ifdef USE_SAFETY_CHECKS
-			if (BM_edge_exists(l_a->v, l_b->v) == false)
+			if (BM_edge_exists(l_a->v, l_b->v) == NULL)
 #endif
 			{
 				BMFace *f_new;

source/blender/editors/mesh/mesh_navmesh.c

@@ -461,7 +461,7 @@ static int navmesh_create_exec(bContext *C, wmOperator *op)
 		unsigned int lay = 0;
 
 		int nverts = 0, ntris = 0;
-		int *tris = 0;
+		int *tris = NULL;
 		float *verts = NULL;
 
 		createVertsTrisData(C, obs, &nverts, &verts, &ntris, &tris, &lay);

source/blender/editors/mesh/meshtools.c

@@ -1336,7 +1336,7 @@ bool ED_mesh_pick_vert(bContext *C, Object *ob, const int mval[2], unsigned int
 		const float mval_f[2] = {(float)mval[0],
 		                         (float)mval[1]};
 
-		VertPickData data = {0};
+		VertPickData data = {NULL};
 
 		ED_view3d_init_mats_rv3d(ob, rv3d);
 

source/blender/editors/transform/transform_conversions.c

@@ -1991,7 +1991,7 @@ static struct TransIslandData *editmesh_islands_info_calc(BMEditMesh *em, int *r
 
 	/* may be an edge OR a face array */
 	for (i = 0; i < group_tot; i++) {
-		BMEditSelection ese = {0};
+		BMEditSelection ese = {NULL};
 
 		const int fg_sta = group_index[i][0];
 		const int fg_len = group_index[i][1];
@@ -6421,7 +6421,7 @@ void flushTransTracking(TransInfo *t)
 				}
 			}
 
-			if (tdt->area != TRACK_AREA_POINT || tdt->relative == 0) {
+			if (tdt->area != TRACK_AREA_POINT || tdt->relative == NULL) {
 				td2d->loc2d[0] = loc2d[0];
 				td2d->loc2d[1] = loc2d[1];
 

source/blender/editors/uvedit/uvedit_unwrap_ops.c

@@ -362,7 +362,7 @@ static ParamHandle *construct_param_handle_subsurfed(Scene *scene, Object *ob, B
 	ModifierData *md;
 	SubsurfModifierData *smd_real;
 	/* modifier initialization data, will  control what type of subdivision will happen*/
-	SubsurfModifierData smd = {{0}};
+	SubsurfModifierData smd = {{NULL}};
 	/* Used to hold subsurfed Mesh */
 	DerivedMesh *derivedMesh, *initialDerived;
 	/* holds original indices for subsurfed mesh */

source/blender/modifiers/intern/MOD_laplaciansmooth.c

@@ -366,7 +366,7 @@ static void init_laplacian_matrix(LaplacianSystem *sys)
 		v1 = sys->vertexCos[idv1];
 		v2 = sys->vertexCos[idv2];
 		v3 = sys->vertexCos[idv3];
-		v4 = has_4_vert ? sys->vertexCos[idv4] : 0;
+		v4 = has_4_vert ? sys->vertexCos[idv4] : NULL;
 
 		if (has_4_vert) {
 			areaf = area_quad_v3(v1, v2, v3, sys->vertexCos[sys->mfaces[i].v4]);

source/blender/modifiers/intern/MOD_skin.c

@@ -1751,7 +1751,7 @@ static void skin_set_orig_indices(DerivedMesh *dm)
 
 	totpoly = dm->getNumPolys(dm);
 	orig = CustomData_add_layer(&dm->polyData, CD_ORIGINDEX,
-	                            CD_CALLOC, 0, totpoly);
+	                            CD_CALLOC, NULL, totpoly);
 	for (i = 0; i < totpoly; i++)
 		orig[i] = ORIGINDEX_NONE;
 }