diff --git a/source/blender/blenkernel/BKE_image.h b/source/blender/blenkernel/BKE_image.h
index 4ce740a1f5a..0d8b6efb4b1 100644
--- a/source/blender/blenkernel/BKE_image.h
+++ b/source/blender/blenkernel/BKE_image.h
@@ -322,12 +322,12 @@ struct ImageTile *BKE_image_get_tile_from_iuser(struct Image *ima, struct ImageU
 
 int BKE_image_get_tile_from_pos(struct Image *ima,
                                 const float uv[2],
-                                float new_uv[2],
-                                float ofs[2]);
+                                float r_uv[2],
+                                float r_ofs[2]);
 
-void BKE_image_get_size(struct Image *image, struct ImageUser *iuser, int *width, int *height);
-void BKE_image_get_size_fl(struct Image *image, struct ImageUser *iuser, float size[2]);
-void BKE_image_get_aspect(struct Image *image, float *aspx, float *aspy);
+void BKE_image_get_size(struct Image *image, struct ImageUser *iuser, int *r_width, int *r_height);
+void BKE_image_get_size_fl(struct Image *image, struct ImageUser *iuser, float r_size[2]);
+void BKE_image_get_aspect(struct Image *image, float *r_aspx, float *r_aspy);
 
 /* image_gen.c */
 void BKE_image_buf_fill_color(
diff --git a/source/blender/blenkernel/intern/image.c b/source/blender/blenkernel/intern/image.c
index 953b738213a..5dca9bf2ac5 100644
--- a/source/blender/blenkernel/intern/image.c
+++ b/source/blender/blenkernel/intern/image.c
@@ -578,16 +578,16 @@ ImageTile *BKE_image_get_tile_from_iuser(Image *ima, ImageUser *iuser)
 
 int BKE_image_get_tile_from_pos(struct Image *ima,
                                 const float uv[2],
-                                float new_uv[2],
-                                float ofs[2])
+                                float r_uv[2],
+                                float r_ofs[2])
 {
   float local_ofs[2];
-  if (ofs == NULL) {
-    ofs = local_ofs;
+  if (r_ofs == NULL) {
+    r_ofs = local_ofs;
   }
 
-  copy_v2_v2(new_uv, uv);
-  zero_v2(ofs);
+  copy_v2_v2(r_uv, uv);
+  zero_v2(r_ofs);
 
   if ((ima->source != IMA_SRC_TILED) || uv[0] < 0.0f || uv[1] < 0.0f || uv[0] >= 10.0f) {
     return 0;
@@ -600,9 +600,9 @@ int BKE_image_get_tile_from_pos(struct Image *ima,
   if (BKE_image_get_tile(ima, tile_number) == NULL) {
     return 0;
   }
-  ofs[0] = ix;
-  ofs[1] = iy;
-  sub_v2_v2(new_uv, ofs);
+  r_ofs[0] = ix;
+  r_ofs[1] = iy;
+  sub_v2_v2(r_uv, r_ofs);
 
   return tile_number;
 }
@@ -5341,7 +5341,7 @@ bool BKE_image_has_alpha(struct Image *image)
   }
 }
 
-void BKE_image_get_size(Image *image, ImageUser *iuser, int *width, int *height)
+void BKE_image_get_size(Image *image, ImageUser *iuser, int *r_width, int *r_height)
 {
   ImBuf *ibuf = NULL;
   void *lock;
@@ -5351,22 +5351,22 @@ void BKE_image_get_size(Image *image, ImageUser *iuser, int *width, int *height)
   }
 
   if (ibuf && ibuf->x > 0 && ibuf->y > 0) {
-    *width = ibuf->x;
-    *height = ibuf->y;
+    *r_width = ibuf->x;
+    *r_height = ibuf->y;
   }
   else if (image != NULL && image->type == IMA_TYPE_R_RESULT && iuser != NULL &&
            iuser->scene != NULL) {
     Scene *scene = iuser->scene;
-    *width = (scene->r.xsch * scene->r.size) / 100;
-    *height = (scene->r.ysch * scene->r.size) / 100;
+    *r_width = (scene->r.xsch * scene->r.size) / 100;
+    *r_height = (scene->r.ysch * scene->r.size) / 100;
     if ((scene->r.mode & R_BORDER) && (scene->r.mode & R_CROP)) {
-      *width *= BLI_rctf_size_x(&scene->r.border);
-      *height *= BLI_rctf_size_y(&scene->r.border);
+      *r_width *= BLI_rctf_size_x(&scene->r.border);
+      *r_height *= BLI_rctf_size_y(&scene->r.border);
     }
   }
   else {
-    *width = IMG_SIZE_FALLBACK;
-    *height = IMG_SIZE_FALLBACK;
+    *r_width = IMG_SIZE_FALLBACK;
+    *r_height = IMG_SIZE_FALLBACK;
   }
 
   if (image != NULL) {
@@ -5374,25 +5374,25 @@ void BKE_image_get_size(Image *image, ImageUser *iuser, int *width, int *height)
   }
 }
 
-void BKE_image_get_size_fl(Image *image, ImageUser *iuser, float size[2])
+void BKE_image_get_size_fl(Image *image, ImageUser *iuser, float r_size[2])
 {
   int width, height;
   BKE_image_get_size(image, iuser, &width, &height);
 
-  size[0] = (float)width;
-  size[1] = (float)height;
+  r_size[0] = (float)width;
+  r_size[1] = (float)height;
 }
 
-void BKE_image_get_aspect(Image *image, float *aspx, float *aspy)
+void BKE_image_get_aspect(Image *image, float *r_aspx, float *r_aspy)
 {
-  *aspx = 1.0;
+  *r_aspx = 1.0;
 
   /* x is always 1 */
   if (image) {
-    *aspy = image->aspy / image->aspx;
+    *r_aspy = image->aspy / image->aspx;
   }
   else {
-    *aspy = 1.0f;
+    *r_aspy = 1.0f;
   }
 }
 
diff --git a/source/blender/blenkernel/intern/tracking_region_tracker.c b/source/blender/blenkernel/intern/tracking_region_tracker.c
index 6e8d4146d12..7e37e438e24 100644
--- a/source/blender/blenkernel/intern/tracking_region_tracker.c
+++ b/source/blender/blenkernel/intern/tracking_region_tracker.c
@@ -75,8 +75,8 @@ static void uint8_rgba_to_float_gray(const unsigned char *rgba,
 static float *track_get_search_floatbuf(ImBuf *ibuf,
                                         MovieTrackingTrack *track,
                                         MovieTrackingMarker *marker,
-                                        int *width_r,
-                                        int *height_r)
+                                        int *r_width,
+                                        int *r_height)
 {
   ImBuf *searchibuf;
   float *gray_pixels;
@@ -85,8 +85,8 @@ static float *track_get_search_floatbuf(ImBuf *ibuf,
   searchibuf = BKE_tracking_get_search_imbuf(ibuf, track, marker, false, true);
 
   if (!searchibuf) {
-    *width_r = 0;
-    *height_r = 0;
+    *r_width = 0;
+    *r_height = 0;
     return NULL;
   }
 
@@ -106,8 +106,8 @@ static float *track_get_search_floatbuf(ImBuf *ibuf,
 
   IMB_freeImBuf(searchibuf);
 
-  *width_r = width;
-  *height_r = height;
+  *r_width = width;
+  *r_height = height;
 
   return gray_pixels;
 }
@@ -138,7 +138,7 @@ static ImBuf *tracking_context_get_keyframed_ibuf(MovieClip *clip,
                                                   MovieTrackingTrack *track,
                                                   int curfra,
                                                   bool backwards,
-                                                  MovieTrackingMarker **marker_keyed_r)
+                                                  MovieTrackingMarker **r_marker_keyed)
 {
   MovieTrackingMarker *marker_keyed;
   int keyed_framenr;
@@ -150,7 +150,7 @@ static ImBuf *tracking_context_get_keyframed_ibuf(MovieClip *clip,
 
   keyed_framenr = marker_keyed->framenr;
 
-  *marker_keyed_r = marker_keyed;
+  *r_marker_keyed = marker_keyed;
 
   return tracking_context_get_frame_ibuf(clip, user, clip_flag, keyed_framenr);
 }
diff --git a/source/blender/blenlib/BLI_voronoi_2d.h b/source/blender/blenlib/BLI_voronoi_2d.h
index 947b120f51a..a48f32c283a 100644
--- a/source/blender/blenlib/BLI_voronoi_2d.h
+++ b/source/blender/blenlib/BLI_voronoi_2d.h
@@ -73,10 +73,10 @@ void BLI_voronoi_triangulate(const VoronoiSite *sites,
                              struct ListBase *edges,
                              int width,
                              int height,
-                             VoronoiTriangulationPoint **triangulated_points_r,
-                             int *triangulated_points_total_r,
-                             int (**triangles_r)[3],
-                             int *triangles_total_r);
+                             VoronoiTriangulationPoint **r_triangulated_points,
+                             int *r_triangulated_points_total,
+                             int (**r_triangles)[3],
+                             int *r_triangles_total);
 
 #ifdef __cplusplus
 }
diff --git a/source/blender/blenlib/intern/voronoi_2d.c b/source/blender/blenlib/intern/voronoi_2d.c
index 61052aa00f9..59270c58341 100644
--- a/source/blender/blenlib/intern/voronoi_2d.c
+++ b/source/blender/blenlib/intern/voronoi_2d.c
@@ -792,10 +792,10 @@ void BLI_voronoi_triangulate(const VoronoiSite *sites,
                              ListBase *edges,
                              int width,
                              int height,
-                             VoronoiTriangulationPoint **triangulated_points_r,
-                             int *triangulated_points_total_r,
-                             int (**triangles_r)[3],
-                             int *triangles_total_r)
+                             VoronoiTriangulationPoint **r_triangulated_points,
+                             int *r_triangulated_points_total,
+                             int (**r_triangles)[3],
+                             int *r_triangles_total)
 {
   VoronoiTriangulationPoint *triangulated_points = NULL;
   int(*triangles)[3] = NULL;
@@ -853,11 +853,11 @@ void BLI_voronoi_triangulate(const VoronoiSite *sites,
     mul_v3_fl(triangulation_point->color, 1.0f / triangulation_point->power);
   }
 
-  *triangulated_points_r = triangulated_points;
-  *triangulated_points_total_r = triangulated_points_total;
+  *r_triangulated_points = triangulated_points;
+  *r_triangulated_points_total = triangulated_points_total;
 
-  *triangles_r = triangles;
-  *triangles_total_r = triangles_total;
+  *r_triangles = triangles;
+  *r_triangles_total = triangles_total;
 
   BLI_freelistN(&boundary_edges);
 }
diff --git a/source/blender/editors/animation/anim_draw.c b/source/blender/editors/animation/anim_draw.c
index 77399880b8d..bcb9ddc5889 100644
--- a/source/blender/editors/animation/anim_draw.c
+++ b/source/blender/editors/animation/anim_draw.c
@@ -515,7 +515,7 @@ float ANIM_unit_mapping_get_factor(Scene *scene, ID *id, FCurve *fcu, short flag
   return 1.0f;
 }
 
-static bool find_prev_next_keyframes(struct bContext *C, int *nextfra, int *prevfra)
+static bool find_prev_next_keyframes(struct bContext *C, int *r_nextfra, int *r_prevfra)
 {
   Scene *scene = CTX_data_scene(C);
   Object *ob = CTX_data_active_object(C);
@@ -594,17 +594,17 @@ static bool find_prev_next_keyframes(struct bContext *C, int *nextfra, int *prev
   /* any success? */
   if (doneprev || donenext) {
     if (doneprev) {
-      *prevfra = cfraprev;
+      *r_prevfra = cfraprev;
     }
     else {
-      *prevfra = CFRA - (cfranext - CFRA);
+      *r_prevfra = CFRA - (cfranext - CFRA);
     }
 
     if (donenext) {
-      *nextfra = cfranext;
+      *r_nextfra = cfranext;
     }
     else {
-      *nextfra = CFRA + (CFRA - cfraprev);
+      *r_nextfra = CFRA + (CFRA - cfraprev);
     }
 
     return true;
diff --git a/source/blender/editors/animation/anim_markers.c b/source/blender/editors/animation/anim_markers.c
index 2215021ce1a..7868d453268 100644
--- a/source/blender/editors/animation/anim_markers.c
+++ b/source/blender/editors/animation/anim_markers.c
@@ -197,7 +197,7 @@ int ED_markers_find_nearest_marker_time(ListBase *markers, float x)
   return (nearest) ? (nearest->frame) : round_fl_to_int(x);
 }
 
-void ED_markers_get_minmax(ListBase *markers, short sel, float *first, float *last)
+void ED_markers_get_minmax(ListBase *markers, short sel, float *r_first, float *r_last)
 {
   TimeMarker *marker;
   float min, max;
@@ -205,8 +205,8 @@ void ED_markers_get_minmax(ListBase *markers, short sel, float *first, float *la
   /* sanity check */
   // printf("markers = %p -  %p, %p\n", markers, markers->first, markers->last);
   if (ELEM(NULL, markers, markers->first, markers->last)) {
-    *first = 0.0f;
-    *last = 0.0f;
+    *r_first = 0.0f;
+    *r_last = 0.0f;
     return;
   }
 
@@ -224,8 +224,8 @@ void ED_markers_get_minmax(ListBase *markers, short sel, float *first, float *la
   }
 
   /* set the min/max values */
-  *first = min;
-  *last = max;
+  *r_first = min;
+  *r_last = max;
 }
 
 /**
diff --git a/source/blender/editors/include/ED_image.h b/source/blender/editors/include/ED_image.h
index 1c260bb826a..910cf362a37 100644
--- a/source/blender/editors/include/ED_image.h
+++ b/source/blender/editors/include/ED_image.h
@@ -65,14 +65,14 @@ int ED_space_image_get_display_channel_mask(struct ImBuf *ibuf);
 void ED_space_image_release_buffer(struct SpaceImage *sima, struct ImBuf *ibuf, void *lock);
 bool ED_space_image_has_buffer(struct SpaceImage *sima);
 
-void ED_space_image_get_size(struct SpaceImage *sima, int *width, int *height);
-void ED_space_image_get_size_fl(struct SpaceImage *sima, float size[2]);
-void ED_space_image_get_aspect(struct SpaceImage *sima, float *aspx, float *aspy);
+void ED_space_image_get_size(struct SpaceImage *sima, int *r_width, int *r_height);
+void ED_space_image_get_size_fl(struct SpaceImage *sima, float r_size[2]);
+void ED_space_image_get_aspect(struct SpaceImage *sima, float *r_aspx, float *r_aspy);
 void ED_space_image_get_zoom(struct SpaceImage *sima,
                              struct ARegion *region,
-                             float *zoomx,
-                             float *zoomy);
-void ED_space_image_get_uv_aspect(struct SpaceImage *sima, float *aspx, float *aspy);
+                             float *r_zoomx,
+                             float *r_zoomy);
+void ED_space_image_get_uv_aspect(struct SpaceImage *sima, float *r_aspx, float *r_aspy);
 
 void ED_space_image_scopes_update(const struct bContext *C,
                                   struct SpaceImage *sima,
@@ -83,14 +83,17 @@ void ED_space_image_paint_update(struct Main *bmain,
                                  struct wmWindowManager *wm,
                                  struct Scene *scene);
 
-void ED_image_get_uv_aspect(struct Image *ima, struct ImageUser *iuser, float *aspx, float *aspy);
+void ED_image_get_uv_aspect(struct Image *ima,
+                            struct ImageUser *iuser,
+                            float *r_aspx,
+                            float *r_aspy);
 void ED_image_mouse_pos(struct SpaceImage *sima,
                         struct ARegion *region,
                         const int mval[2],
                         float co[2]);
 void ED_image_view_center_to_point(struct SpaceImage *sima, float x, float y);
 void ED_image_point_pos(
-    struct SpaceImage *sima, struct ARegion *region, float x, float y, float *xr, float *yr);
+    struct SpaceImage *sima, struct ARegion *region, float x, float y, float *r_x, float *r_y);
 void ED_image_point_pos__reverse(struct SpaceImage *sima,
                                  struct ARegion *region,
                                  const float co[2],
diff --git a/source/blender/editors/include/ED_uvedit.h b/source/blender/editors/include/ED_uvedit.h
index 511b33bacc5..8c565536c71 100644
--- a/source/blender/editors/include/ED_uvedit.h
+++ b/source/blender/editors/include/ED_uvedit.h
@@ -188,7 +188,7 @@ bool ED_uvedit_nearest_uv_multi(const struct Scene *scene,
                                 float r_uv[2]);
 
 void ED_uvedit_get_aspect(
-    const struct Scene *scene, struct Object *ob, struct BMesh *em, float *aspx, float *aspy);
+    const struct Scene *scene, struct Object *ob, struct BMesh *em, float *r_aspx, float *r_aspy);
 
 /* uvedit_unwrap_ops.c */
 void ED_uvedit_live_unwrap_begin(struct Scene *scene, struct Object *obedit);
diff --git a/source/blender/editors/include/ED_view3d.h b/source/blender/editors/include/ED_view3d.h
index 06de4705ac6..bb065ee0008 100644
--- a/source/blender/editors/include/ED_view3d.h
+++ b/source/blender/editors/include/ED_view3d.h
@@ -674,8 +674,10 @@ bool ED_view3d_distance_set_from_location(struct RegionView3D *rv3d,
                                           const float dist_co[3],
                                           const float dist_min);
 
-float ED_scene_grid_scale(const struct Scene *scene, const char **grid_unit);
-float ED_view3d_grid_scale(const struct Scene *scene, struct View3D *v3d, const char **grid_unit);
+float ED_scene_grid_scale(const struct Scene *scene, const char **r_grid_unit);
+float ED_view3d_grid_scale(const struct Scene *scene,
+                           struct View3D *v3d,
+                           const char **r_grid_unit);
 void ED_view3d_grid_steps(const struct Scene *scene,
                           struct View3D *v3d,
                           struct RegionView3D *rv3d,
@@ -683,7 +685,7 @@ void ED_view3d_grid_steps(const struct Scene *scene,
 float ED_view3d_grid_view_scale(struct Scene *scene,
                                 struct View3D *v3d,
                                 struct RegionView3D *rv3d,
-                                const char **grid_unit);
+                                const char **r_grid_unit);
 
 void ED_scene_draw_fps(const struct Scene *scene, int xoffset, int *yoffset);
 
diff --git a/source/blender/editors/include/UI_interface.h b/source/blender/editors/include/UI_interface.h
index bb2edef8adc..1fa6e5b12c1 100644
--- a/source/blender/editors/include/UI_interface.h
+++ b/source/blender/editors/include/UI_interface.h
@@ -2362,7 +2362,7 @@ void UI_drop_color_copy(struct wmDrag *drag, struct wmDropBox *drop);
 bool UI_drop_color_poll(struct bContext *C,
                         struct wmDrag *drag,
                         const struct wmEvent *event,
-                        const char **tooltip);
+                        const char **r_tooltip);
 
 bool UI_context_copy_to_selected_list(struct bContext *C,
                                       struct PointerRNA *ptr,
diff --git a/source/blender/editors/interface/interface_ops.c b/source/blender/editors/interface/interface_ops.c
index 7533ebd4397..519ba4cbbdf 100644
--- a/source/blender/editors/interface/interface_ops.c
+++ b/source/blender/editors/interface/interface_ops.c
@@ -1251,7 +1251,7 @@ static bool ui_editsource_uibut_match(uiBut *but_a, uiBut *but_b)
 
 void UI_editsource_active_but_test(uiBut *but)
 {
-  extern void PyC_FileAndNum_Safe(const char **filename, int *lineno);
+  extern void PyC_FileAndNum_Safe(const char **r_filename, int *r_lineno);
 
   struct uiEditSourceButStore *but_store = MEM_callocN(sizeof(uiEditSourceButStore), __func__);
 
@@ -1703,7 +1703,7 @@ static void UI_OT_button_string_clear(wmOperatorType *ot)
 bool UI_drop_color_poll(struct bContext *C,
                         wmDrag *drag,
                         const wmEvent *UNUSED(event),
-                        const char **UNUSED(tooltip))
+                        const char **UNUSED(r_tooltip))
 {
   /* should only return true for regions that include buttons, for now
    * return true always */
diff --git a/source/blender/editors/mask/mask_add.c b/source/blender/editors/mask/mask_add.c
index 80716195121..a190b048ee3 100644
--- a/source/blender/editors/mask/mask_add.c
+++ b/source/blender/editors/mask/mask_add.c
@@ -55,11 +55,11 @@ bool ED_mask_find_nearest_diff_point(const bContext *C,
                                      float tangent[2],
                                      const bool use_deform,
                                      const bool use_project,
-                                     MaskLayer **mask_layer_r,
-                                     MaskSpline **spline_r,
-                                     MaskSplinePoint **point_r,
-                                     float *u_r,
-                                     float *score_r)
+                                     MaskLayer **r_mask_layer,
+                                     MaskSpline **r_spline,
+                                     MaskSplinePoint **r_point,
+                                     float *r_u,
+                                     float *r_score)
 {
   ScrArea *sa = CTX_wm_area(C);
   ARegion *region = CTX_wm_region(C);
@@ -156,44 +156,44 @@ bool ED_mask_find_nearest_diff_point(const bContext *C,
   }
 
   if (point && dist_best_sq < threshold) {
-    if (mask_layer_r) {
-      *mask_layer_r = point_mask_layer;
+    if (r_mask_layer) {
+      *r_mask_layer = point_mask_layer;
     }
 
-    if (spline_r) {
-      *spline_r = point_spline;
+    if (r_spline) {
+      *r_spline = point_spline;
     }
 
-    if (point_r) {
-      *point_r = point;
+    if (r_point) {
+      *r_point = point;
     }
 
-    if (u_r) {
+    if (r_u) {
       /* TODO(sergey): Projection fails in some weirdo cases.. */
       if (use_project) {
         u = BKE_mask_spline_project_co(point_spline, point, u, normal_co, MASK_PROJ_ANY);
       }
 
-      *u_r = u;
+      *r_u = u;
     }
 
-    if (score_r) {
-      *score_r = dist_best_sq;
+    if (r_score) {
+      *r_score = dist_best_sq;
     }
 
     return true;
   }
 
-  if (mask_layer_r) {
-    *mask_layer_r = NULL;
+  if (r_mask_layer) {
+    *r_mask_layer = NULL;
   }
 
-  if (spline_r) {
-    *spline_r = NULL;
+  if (r_spline) {
+    *r_spline = NULL;
   }
 
-  if (point_r) {
-    *point_r = NULL;
+  if (r_point) {
+    *r_point = NULL;
   }
 
   return false;
diff --git a/source/blender/editors/mask/mask_intern.h b/source/blender/editors/mask/mask_intern.h
index 091cf4937ae..e194a68c45d 100644
--- a/source/blender/editors/mask/mask_intern.h
+++ b/source/blender/editors/mask/mask_intern.h
@@ -39,11 +39,11 @@ bool ED_mask_find_nearest_diff_point(const struct bContext *C,
                                      float tangent[2],
                                      const bool use_deform,
                                      const bool use_project,
-                                     struct MaskLayer **mask_layer_r,
-                                     struct MaskSpline **spline_r,
-                                     struct MaskSplinePoint **point_r,
-                                     float *u_r,
-                                     float *score_r);
+                                     struct MaskLayer **r_mask_layer,
+                                     struct MaskSpline **r_spline,
+                                     struct MaskSplinePoint **r_point,
+                                     float *r_u,
+                                     float *r_score);
 
 void MASK_OT_add_vertex(struct wmOperatorType *ot);
 void MASK_OT_add_feather_vertex(struct wmOperatorType *ot);
@@ -76,20 +76,20 @@ bool ED_mask_feather_find_nearest(const struct bContext *C,
                                   struct Mask *mask,
                                   const float normal_co[2],
                                   const float threshold,
-                                  struct MaskLayer **mask_layer_r,
-                                  struct MaskSpline **spline_r,
-                                  struct MaskSplinePoint **point_r,
-                                  struct MaskSplinePointUW **uw_r,
-                                  float *score);
+                                  struct MaskLayer **r_mask_layer,
+                                  struct MaskSpline **r_spline,
+                                  struct MaskSplinePoint **r_point,
+                                  struct MaskSplinePointUW **r_uw,
+                                  float *r_score);
 
 struct MaskSplinePoint *ED_mask_point_find_nearest(const struct bContext *C,
                                                    struct Mask *mask,
                                                    const float normal_co[2],
                                                    const float threshold,
-                                                   struct MaskLayer **mask_layer_r,
-                                                   struct MaskSpline **spline_r,
-                                                   eMaskWhichHandle *which_handle_r,
-                                                   float *score);
+                                                   struct MaskLayer **r_mask_layer,
+                                                   struct MaskSpline **r_spline,
+                                                   eMaskWhichHandle *r_which_handle,
+                                                   float *r_score);
 
 void MASK_OT_layer_move(struct wmOperatorType *ot);
 
diff --git a/source/blender/editors/mask/mask_ops.c b/source/blender/editors/mask/mask_ops.c
index 5e7d94dd567..79999bcebca 100644
--- a/source/blender/editors/mask/mask_ops.c
+++ b/source/blender/editors/mask/mask_ops.c
@@ -69,10 +69,10 @@ MaskSplinePoint *ED_mask_point_find_nearest(const bContext *C,
                                             Mask *mask_orig,
                                             const float normal_co[2],
                                             const float threshold,
-                                            MaskLayer **mask_layer_r,
-                                            MaskSpline **spline_r,
-                                            eMaskWhichHandle *which_handle_r,
-                                            float *score)
+                                            MaskLayer **r_mask_layer,
+                                            MaskSpline **r_spline,
+                                            eMaskWhichHandle *r_which_handle,
+                                            float *r_score)
 {
   ScrArea *sa = CTX_wm_area(C);
   ARegion *region = CTX_wm_region(C);
@@ -185,35 +185,35 @@ MaskSplinePoint *ED_mask_point_find_nearest(const bContext *C,
   }
 
   if (len_sq < threshold_sq) {
-    if (mask_layer_r) {
-      *mask_layer_r = point_mask_layer;
+    if (r_mask_layer) {
+      *r_mask_layer = point_mask_layer;
     }
 
-    if (spline_r) {
-      *spline_r = point_spline;
+    if (r_spline) {
+      *r_spline = point_spline;
     }
 
-    if (which_handle_r) {
-      *which_handle_r = which_handle;
+    if (r_which_handle) {
+      *r_which_handle = which_handle;
     }
 
-    if (score) {
-      *score = sqrtf(len_sq);
+    if (r_score) {
+      *r_score = sqrtf(len_sq);
     }
 
     return point;
   }
 
-  if (mask_layer_r) {
-    *mask_layer_r = NULL;
+  if (r_mask_layer) {
+    *r_mask_layer = NULL;
   }
 
-  if (spline_r) {
-    *spline_r = NULL;
+  if (r_spline) {
+    *r_spline = NULL;
   }
 
-  if (which_handle_r) {
-    *which_handle_r = MASK_WHICH_HANDLE_NONE;
+  if (r_which_handle) {
+    *r_which_handle = MASK_WHICH_HANDLE_NONE;
   }
 
   return NULL;
@@ -223,11 +223,11 @@ bool ED_mask_feather_find_nearest(const bContext *C,
                                   Mask *mask_orig,
                                   const float normal_co[2],
                                   const float threshold,
-                                  MaskLayer **mask_layer_r,
-                                  MaskSpline **spline_r,
-                                  MaskSplinePoint **point_r,
-                                  MaskSplinePointUW **uw_r,
-                                  float *score)
+                                  MaskLayer **r_mask_layer,
+                                  MaskSpline **r_spline,
+                                  MaskSplinePoint **r_point,
+                                  MaskSplinePointUW **r_uw,
+                                  float *r_score)
 {
   ScrArea *sa = CTX_wm_area(C);
   ARegion *region = CTX_wm_region(C);
@@ -306,39 +306,39 @@ bool ED_mask_feather_find_nearest(const bContext *C,
   }
 
   if (len < threshold_sq) {
-    if (mask_layer_r) {
-      *mask_layer_r = point_mask_layer;
+    if (r_mask_layer) {
+      *r_mask_layer = point_mask_layer;
     }
 
-    if (spline_r) {
-      *spline_r = point_spline;
+    if (r_spline) {
+      *r_spline = point_spline;
     }
 
-    if (point_r) {
-      *point_r = point;
+    if (r_point) {
+      *r_point = point;
     }
 
-    if (uw_r) {
-      *uw_r = uw;
+    if (r_uw) {
+      *r_uw = uw;
     }
 
-    if (score) {
-      *score = sqrtf(len);
+    if (r_score) {
+      *r_score = sqrtf(len);
     }
 
     return true;
   }
 
-  if (mask_layer_r) {
-    *mask_layer_r = NULL;
+  if (r_mask_layer) {
+    *r_mask_layer = NULL;
   }
 
-  if (spline_r) {
-    *spline_r = NULL;
+  if (r_spline) {
+    *r_spline = NULL;
   }
 
-  if (point_r) {
-    *point_r = NULL;
+  if (r_point) {
+    *r_point = NULL;
   }
 
   return false;
@@ -549,8 +549,8 @@ static void mask_point_undistort_pos(SpaceClip *sc, float r_co[2], const float c
 static bool spline_under_mouse_get(const bContext *C,
                                    Mask *mask,
                                    const float co[2],
-                                   MaskLayer **mask_layer_r,
-                                   MaskSpline **mask_spline_r)
+                                   MaskLayer **r_mask_layer,
+                                   MaskSpline **r_mask_spline)
 {
   const float threshold = 19.0f;
   ScrArea *sa = CTX_wm_area(C);
@@ -561,8 +561,8 @@ static bool spline_under_mouse_get(const bContext *C,
   MaskLayer *closest_layer = NULL;
   MaskSpline *closest_spline = NULL;
   bool undistort = false;
-  *mask_layer_r = NULL;
-  *mask_spline_r = NULL;
+  *r_mask_layer = NULL;
+  *r_mask_spline = NULL;
   ED_mask_get_size(sa, &width, &height);
   pixel_co[0] = co[0] * width;
   pixel_co[1] = co[1] * height;
@@ -634,8 +634,8 @@ static bool spline_under_mouse_get(const bContext *C,
       }
     }
 
-    *mask_layer_r = closest_layer;
-    *mask_spline_r = closest_spline;
+    *r_mask_layer = closest_layer;
+    *r_mask_spline = closest_spline;
     return true;
   }
   return false;
diff --git a/source/blender/editors/screen/screen_ops.c b/source/blender/editors/screen/screen_ops.c
index 9c3534a88b1..6a64e5212c4 100644
--- a/source/blender/editors/screen/screen_ops.c
+++ b/source/blender/editors/screen/screen_ops.c
@@ -5525,7 +5525,7 @@ static void keymap_modal_set(wmKeyConfig *keyconf)
 static bool blend_file_drop_poll(bContext *UNUSED(C),
                                  wmDrag *drag,
                                  const wmEvent *UNUSED(event),
-                                 const char **UNUSED(tooltip))
+                                 const char **UNUSED(r_tooltip))
 {
   if (drag->type == WM_DRAG_PATH) {
     if (drag->icon == ICON_FILE_BLEND) {
diff --git a/source/blender/editors/space_clip/clip_intern.h b/source/blender/editors/space_clip/clip_intern.h
index b66f7605f41..4dc8d367f2b 100644
--- a/source/blender/editors/space_clip/clip_intern.h
+++ b/source/blender/editors/space_clip/clip_intern.h
@@ -178,7 +178,7 @@ void clip_draw_sfra_efra(struct View2D *v2d, struct Scene *scene);
 
 /* tracking_ops.c */
 struct MovieTrackingTrack *tracking_marker_check_slide(
-    struct bContext *C, const struct wmEvent *event, int *area_r, int *action_r, int *corner_r);
+    struct bContext *C, const struct wmEvent *event, int *r_area, int *r_action, int *r_corner);
 
 void CLIP_OT_add_marker(struct wmOperatorType *ot);
 void CLIP_OT_add_marker_at_click(struct wmOperatorType *ot);
diff --git a/source/blender/editors/space_clip/clip_ops.c b/source/blender/editors/space_clip/clip_ops.c
index efc8c3bb7dd..4e5c6513695 100644
--- a/source/blender/editors/space_clip/clip_ops.c
+++ b/source/blender/editors/space_clip/clip_ops.c
@@ -1315,8 +1315,8 @@ typedef struct ProxyThread {
 
 static unsigned char *proxy_thread_next_frame(ProxyQueue *queue,
                                               MovieClip *clip,
-                                              size_t *size_r,
-                                              int *cfra_r)
+                                              size_t *r_size,
+                                              int *r_cfra)
 {
   unsigned char *mem = NULL;
 
@@ -1353,8 +1353,8 @@ static unsigned char *proxy_thread_next_frame(ProxyQueue *queue,
       return NULL;
     }
 
-    *size_r = size;
-    *cfra_r = queue->cfra;
+    *r_size = size;
+    *r_cfra = queue->cfra;
 
     queue->cfra++;
     close(file);
diff --git a/source/blender/editors/space_clip/space_clip.c b/source/blender/editors/space_clip/space_clip.c
index a273487eee9..4b9c872ffce 100644
--- a/source/blender/editors/space_clip/space_clip.c
+++ b/source/blender/editors/space_clip/space_clip.c
@@ -605,7 +605,7 @@ static int clip_context(const bContext *C, const char *member, bContextDataResul
 static bool clip_drop_poll(bContext *UNUSED(C),
                            wmDrag *drag,
                            const wmEvent *UNUSED(event),
-                           const char **UNUSED(tooltip))
+                           const char **UNUSED(r_tooltip))
 {
   if (drag->type == WM_DRAG_PATH) {
     /* rule might not work? */
diff --git a/source/blender/editors/space_clip/tracking_ops.c b/source/blender/editors/space_clip/tracking_ops.c
index f88f6113b54..739701b5595 100644
--- a/source/blender/editors/space_clip/tracking_ops.c
+++ b/source/blender/editors/space_clip/tracking_ops.c
@@ -544,7 +544,7 @@ static bool slide_check_corners(float (*corners)[2])
 }
 
 MovieTrackingTrack *tracking_marker_check_slide(
-    bContext *C, const wmEvent *event, int *area_r, int *action_r, int *corner_r)
+    bContext *C, const wmEvent *event, int *r_area, int *r_action, int *r_corner)
 {
   const float distance_clip_squared = 12.0f * 12.0f;
   SpaceClip *sc = CTX_wm_space_clip(C);
@@ -657,14 +657,14 @@ MovieTrackingTrack *tracking_marker_check_slide(
   }
 
   if (global_min_distance_squared < distance_clip_squared / sc->zoom) {
-    if (area_r) {
-      *area_r = min_area;
+    if (r_area) {
+      *r_area = min_area;
     }
-    if (action_r) {
-      *action_r = min_action;
+    if (r_action) {
+      *r_action = min_action;
     }
-    if (corner_r) {
-      *corner_r = min_corner;
+    if (r_corner) {
+      *r_corner = min_corner;
     }
     return min_track;
   }
diff --git a/source/blender/editors/space_clip/tracking_ops_plane.c b/source/blender/editors/space_clip/tracking_ops_plane.c
index 0cf0e85929c..3c5646911a3 100644
--- a/source/blender/editors/space_clip/tracking_ops_plane.c
+++ b/source/blender/editors/space_clip/tracking_ops_plane.c
@@ -122,7 +122,7 @@ static float mouse_to_plane_slide_zone_distance_squared(const float co[2],
 
 static MovieTrackingPlaneTrack *tracking_plane_marker_check_slide(bContext *C,
                                                                   const wmEvent *event,
-                                                                  int *corner_r)
+                                                                  int *r_corner)
 {
   const float distance_clip_squared = 12.0f * 12.0f;
   SpaceClip *sc = CTX_wm_space_clip(C);
@@ -162,8 +162,8 @@ static MovieTrackingPlaneTrack *tracking_plane_marker_check_slide(bContext *C,
   }
 
   if (min_distance_squared < distance_clip_squared / sc->zoom) {
-    if (corner_r != NULL) {
-      *corner_r = min_corner;
+    if (r_corner != NULL) {
+      *r_corner = min_corner;
     }
     return min_plane_track;
   }
diff --git a/source/blender/editors/space_clip/tracking_ops_track.c b/source/blender/editors/space_clip/tracking_ops_track.c
index c14895f8483..05623347366 100644
--- a/source/blender/editors/space_clip/tracking_ops_track.c
+++ b/source/blender/editors/space_clip/tracking_ops_track.c
@@ -86,7 +86,7 @@ static int track_count_markers(SpaceClip *sc, MovieClip *clip, int framenr)
   return tot;
 }
 
-static void track_init_markers(SpaceClip *sc, MovieClip *clip, int framenr, int *frames_limit_r)
+static void track_init_markers(SpaceClip *sc, MovieClip *clip, int framenr, int *r_frames_limit)
 {
   ListBase *tracksbase = BKE_tracking_get_active_tracks(&clip->tracking);
   int frames_limit = 0;
@@ -109,7 +109,7 @@ static void track_init_markers(SpaceClip *sc, MovieClip *clip, int framenr, int
       }
     }
   }
-  *frames_limit_r = frames_limit;
+  *r_frames_limit = frames_limit;
 }
 
 static bool track_markers_check_direction(int backwards, int curfra, int efra)
diff --git a/source/blender/editors/space_clip/tracking_select.c b/source/blender/editors/space_clip/tracking_select.c
index 2166cff4883..67c453825f7 100644
--- a/source/blender/editors/space_clip/tracking_select.c
+++ b/source/blender/editors/space_clip/tracking_select.c
@@ -52,7 +52,7 @@
 #include "clip_intern.h"         /* own include */
 #include "tracking_ops_intern.h" /* own include */
 
-static float dist_to_crns(float co[2], float pos[2], float crns[4][2]);
+static float dist_to_crns(const float co[2], const float pos[2], const float crns[4][2]);
 
 /********************** mouse select operator *********************/
 
@@ -70,8 +70,12 @@ static int mouse_on_side(
   return (co[0] >= x1 - epsx && co[0] <= x2 + epsx) && (co[1] >= y1 - epsy && co[1] <= y2 + epsy);
 }
 
-static int mouse_on_rect(
-    const float co[2], float pos[2], float min[2], float max[2], float epsx, float epsy)
+static int mouse_on_rect(const float co[2],
+                         const float pos[2],
+                         const float min[2],
+                         const float max[2],
+                         float epsx,
+                         float epsy)
 {
   return mouse_on_side(
              co, pos[0] + min[0], pos[1] + min[1], pos[0] + max[0], pos[1] + min[1], epsx, epsy) ||
@@ -83,14 +87,15 @@ static int mouse_on_rect(
              co, pos[0] + max[0], pos[1] + min[1], pos[0] + max[0], pos[1] + max[1], epsx, epsy);
 }
 
-static int mouse_on_crns(float co[2], float pos[2], float crns[4][2], float epsx, float epsy)
+static int mouse_on_crns(
+    const float co[2], const float pos[2], const float crns[4][2], float epsx, float epsy)
 {
   float dist = dist_to_crns(co, pos, crns);
 
   return dist < max_ff(epsx, epsy);
 }
 
-static int track_mouse_area(const bContext *C, float co[2], MovieTrackingTrack *track)
+static int track_mouse_area(const bContext *C, const float co[2], MovieTrackingTrack *track)
 {
   SpaceClip *sc = CTX_wm_space_clip(C);
   int framenr = ED_space_clip_get_clip_frame_number(sc);
@@ -142,7 +147,10 @@ static int track_mouse_area(const bContext *C, float co[2], MovieTrackingTrack *
   return TRACK_AREA_NONE;
 }
 
-static float dist_to_rect(float co[2], float pos[2], float min[2], float max[2])
+static float dist_to_rect(const float co[2],
+                          const float pos[2],
+                          const float min[2],
+                          const float max[2])
 {
   float d1, d2, d3, d4;
   float p[2] = {co[0] - pos[0], co[1] - pos[1]};
@@ -158,7 +166,7 @@ static float dist_to_rect(float co[2], float pos[2], float min[2], float max[2])
 }
 
 /* Distance to quad defined by it's corners, corners are relative to pos */
-static float dist_to_crns(float co[2], float pos[2], float crns[4][2])
+static float dist_to_crns(const float co[2], const float pos[2], const float crns[4][2])
 {
   float d1, d2, d3, d4;
   float p[2] = {co[0] - pos[0], co[1] - pos[1]};
@@ -174,7 +182,7 @@ static float dist_to_crns(float co[2], float pos[2], float crns[4][2])
 }
 
 /* Same as above, but all the coordinates are absolute */
-static float dist_to_crns_abs(float co[2], float corners[4][2])
+static float dist_to_crns_abs(const float co[2], const float corners[4][2])
 {
   float d1, d2, d3, d4;
   const float *v1 = corners[0], *v2 = corners[1];
@@ -190,8 +198,8 @@ static float dist_to_crns_abs(float co[2], float corners[4][2])
 
 static MovieTrackingTrack *find_nearest_track(SpaceClip *sc,
                                               ListBase *tracksbase,
-                                              float co[2],
-                                              float *distance_r)
+                                              const float co[2],
+                                              float *r_distance)
 {
   MovieTrackingTrack *track = NULL, *cur;
   float mindist = 0.0f;
@@ -231,15 +239,15 @@ static MovieTrackingTrack *find_nearest_track(SpaceClip *sc,
     cur = cur->next;
   }
 
-  *distance_r = mindist;
+  *r_distance = mindist;
 
   return track;
 }
 
 static MovieTrackingPlaneTrack *find_nearest_plane_track(SpaceClip *sc,
                                                          ListBase *plane_tracks_base,
-                                                         float co[2],
-                                                         float *distance_r)
+                                                         const float co[2],
+                                                         float *r_distance)
 {
   MovieTrackingPlaneTrack *plane_track = NULL, *current_plane_track;
   float min_distance = 0.0f;
@@ -259,7 +267,7 @@ static MovieTrackingPlaneTrack *find_nearest_plane_track(SpaceClip *sc,
     }
   }
 
-  *distance_r = min_distance;
+  *r_distance = min_distance;
 
   return plane_track;
 }
@@ -281,7 +289,7 @@ void ed_tracking_deselect_all_plane_tracks(ListBase *plane_tracks_base)
   }
 }
 
-static int mouse_select(bContext *C, float co[2], const bool extend, const bool deselect_all)
+static int mouse_select(bContext *C, const float co[2], const bool extend, const bool deselect_all)
 {
   SpaceClip *sc = CTX_wm_space_clip(C);
   MovieClip *clip = ED_space_clip_get_clip(sc);
diff --git a/source/blender/editors/space_file/filelist.c b/source/blender/editors/space_file/filelist.c
index cb062cc212a..caab1ac74d0 100644
--- a/source/blender/editors/space_file/filelist.c
+++ b/source/blender/editors/space_file/filelist.c
@@ -2436,9 +2436,9 @@ void filelist_entry_parent_select_set(FileList *filelist,
 }
 
 /* WARNING! dir must be FILE_MAX_LIBEXTRA long! */
-bool filelist_islibrary(struct FileList *filelist, char *dir, char **group)
+bool filelist_islibrary(struct FileList *filelist, char *dir, char **r_group)
 {
-  return BLO_library_path_explode(filelist->filelist.root, dir, group, NULL);
+  return BLO_library_path_explode(filelist->filelist.root, dir, r_group, NULL);
 }
 
 static int groupname_to_code(const char *group)
diff --git a/source/blender/editors/space_file/filelist.h b/source/blender/editors/space_file/filelist.h
index e39594bf1da..e90a8659417 100644
--- a/source/blender/editors/space_file/filelist.h
+++ b/source/blender/editors/space_file/filelist.h
@@ -125,7 +125,7 @@ void filelist_entry_parent_select_set(struct FileList *filelist,
 void filelist_setrecursion(struct FileList *filelist, const int recursion_level);
 
 struct BlendHandle *filelist_lib(struct FileList *filelist);
-bool filelist_islibrary(struct FileList *filelist, char *dir, char **group);
+bool filelist_islibrary(struct FileList *filelist, char *dir, char **r_group);
 void filelist_freelib(struct FileList *filelist);
 
 void filelist_readjob_start(struct FileList *filelist, const struct bContext *C);
diff --git a/source/blender/editors/space_file/space_file.c b/source/blender/editors/space_file/space_file.c
index c3159d38e7e..1574dbbeb76 100644
--- a/source/blender/editors/space_file/space_file.c
+++ b/source/blender/editors/space_file/space_file.c
@@ -663,7 +663,7 @@ static void file_ui_region_listener(wmWindow *UNUSED(win),
 static bool filepath_drop_poll(bContext *C,
                                wmDrag *drag,
                                const wmEvent *UNUSED(event),
-                               const char **UNUSED(tooltip))
+                               const char **UNUSED(r_tooltip))
 {
   if (drag->type == WM_DRAG_PATH) {
     SpaceFile *sfile = CTX_wm_space_file(C);
diff --git a/source/blender/editors/space_image/image_edit.c b/source/blender/editors/space_image/image_edit.c
index 8da67effc94..7f911113b7c 100644
--- a/source/blender/editors/space_image/image_edit.c
+++ b/source/blender/editors/space_image/image_edit.c
@@ -212,7 +212,7 @@ bool ED_space_image_has_buffer(SpaceImage *sima)
   return has_buffer;
 }
 
-void ED_space_image_get_size(SpaceImage *sima, int *width, int *height)
+void ED_space_image_get_size(SpaceImage *sima, int *r_width, int *r_height)
 {
   Scene *scene = sima->iuser.scene;
   ImBuf *ibuf;
@@ -222,94 +222,94 @@ void ED_space_image_get_size(SpaceImage *sima, int *width, int *height)
   ibuf = ED_space_image_acquire_buffer(sima, &lock, 0);
 
   if (ibuf && ibuf->x > 0 && ibuf->y > 0) {
-    *width = ibuf->x;
-    *height = ibuf->y;
+    *r_width = ibuf->x;
+    *r_height = ibuf->y;
   }
   else if (sima->image && sima->image->type == IMA_TYPE_R_RESULT && scene) {
     /* not very important, just nice */
-    *width = (scene->r.xsch * scene->r.size) / 100;
-    *height = (scene->r.ysch * scene->r.size) / 100;
+    *r_width = (scene->r.xsch * scene->r.size) / 100;
+    *r_height = (scene->r.ysch * scene->r.size) / 100;
 
     if ((scene->r.mode & R_BORDER) && (scene->r.mode & R_CROP)) {
-      *width *= BLI_rctf_size_x(&scene->r.border);
-      *height *= BLI_rctf_size_y(&scene->r.border);
+      *r_width *= BLI_rctf_size_x(&scene->r.border);
+      *r_height *= BLI_rctf_size_y(&scene->r.border);
     }
   }
   /* I know a bit weak... but preview uses not actual image size */
-  // XXX else if (image_preview_active(sima, width, height));
+  // XXX else if (image_preview_active(sima, r_width, r_height));
   else {
-    *width = IMG_SIZE_FALLBACK;
-    *height = IMG_SIZE_FALLBACK;
+    *r_width = IMG_SIZE_FALLBACK;
+    *r_height = IMG_SIZE_FALLBACK;
   }
 
   ED_space_image_release_buffer(sima, ibuf, lock);
 }
 
-void ED_space_image_get_size_fl(SpaceImage *sima, float size[2])
+void ED_space_image_get_size_fl(SpaceImage *sima, float r_size[2])
 {
   int size_i[2];
   ED_space_image_get_size(sima, &size_i[0], &size_i[1]);
-  size[0] = size_i[0];
-  size[1] = size_i[1];
+  r_size[0] = size_i[0];
+  r_size[1] = size_i[1];
 }
 
-void ED_space_image_get_aspect(SpaceImage *sima, float *aspx, float *aspy)
+void ED_space_image_get_aspect(SpaceImage *sima, float *r_aspx, float *r_aspy)
 {
   Image *ima = sima->image;
   if ((ima == NULL) || (ima->aspx == 0.0f || ima->aspy == 0.0f)) {
-    *aspx = *aspy = 1.0;
+    *r_aspx = *r_aspy = 1.0;
   }
   else {
-    BKE_image_get_aspect(ima, aspx, aspy);
+    BKE_image_get_aspect(ima, r_aspx, r_aspy);
   }
 }
 
-void ED_space_image_get_zoom(SpaceImage *sima, ARegion *region, float *zoomx, float *zoomy)
+void ED_space_image_get_zoom(SpaceImage *sima, ARegion *region, float *r_zoomx, float *r_zoomy)
 {
   int width, height;
 
   ED_space_image_get_size(sima, &width, &height);
 
-  *zoomx = (float)(BLI_rcti_size_x(&region->winrct) + 1) /
-           (float)(BLI_rctf_size_x(&region->v2d.cur) * width);
-  *zoomy = (float)(BLI_rcti_size_y(&region->winrct) + 1) /
-           (float)(BLI_rctf_size_y(&region->v2d.cur) * height);
+  *r_zoomx = (float)(BLI_rcti_size_x(&region->winrct) + 1) /
+             (float)(BLI_rctf_size_x(&region->v2d.cur) * width);
+  *r_zoomy = (float)(BLI_rcti_size_y(&region->winrct) + 1) /
+             (float)(BLI_rctf_size_y(&region->v2d.cur) * height);
 }
 
-void ED_space_image_get_uv_aspect(SpaceImage *sima, float *aspx, float *aspy)
+void ED_space_image_get_uv_aspect(SpaceImage *sima, float *r_aspx, float *r_aspy)
 {
   int w, h;
 
-  ED_space_image_get_aspect(sima, aspx, aspy);
+  ED_space_image_get_aspect(sima, r_aspx, r_aspy);
   ED_space_image_get_size(sima, &w, &h);
 
-  *aspx *= (float)w;
-  *aspy *= (float)h;
+  *r_aspx *= (float)w;
+  *r_aspy *= (float)h;
 
-  if (*aspx < *aspy) {
-    *aspy = *aspy / *aspx;
-    *aspx = 1.0f;
+  if (*r_aspx < *r_aspy) {
+    *r_aspy = *r_aspy / *r_aspx;
+    *r_aspx = 1.0f;
   }
   else {
-    *aspx = *aspx / *aspy;
-    *aspy = 1.0f;
+    *r_aspx = *r_aspx / *r_aspy;
+    *r_aspy = 1.0f;
   }
 }
 
-void ED_image_get_uv_aspect(Image *ima, ImageUser *iuser, float *aspx, float *aspy)
+void ED_image_get_uv_aspect(Image *ima, ImageUser *iuser, float *r_aspx, float *r_aspy)
 {
   if (ima) {
     int w, h;
 
-    BKE_image_get_aspect(ima, aspx, aspy);
+    BKE_image_get_aspect(ima, r_aspx, r_aspy);
     BKE_image_get_size(ima, iuser, &w, &h);
 
-    *aspx *= (float)w;
-    *aspy *= (float)h;
+    *r_aspx *= (float)w;
+    *r_aspy *= (float)h;
   }
   else {
-    *aspx = 1.0f;
-    *aspy = 1.0f;
+    *r_aspx = 1.0f;
+    *r_aspy = 1.0f;
   }
 }
 
@@ -340,7 +340,8 @@ void ED_image_view_center_to_point(SpaceImage *sima, float x, float y)
   sima->yof = (y - 0.5f) * height * aspy;
 }
 
-void ED_image_point_pos(SpaceImage *sima, ARegion *region, float x, float y, float *xr, float *yr)
+void ED_image_point_pos(
+    SpaceImage *sima, ARegion *region, float x, float y, float *r_x, float *r_y)
 {
   int sx, sy, width, height;
   float zoomx, zoomy;
@@ -350,8 +351,8 @@ void ED_image_point_pos(SpaceImage *sima, ARegion *region, float x, float y, flo
 
   UI_view2d_view_to_region(&region->v2d, 0.0f, 0.0f, &sx, &sy);
 
-  *xr = ((x - sx) / zoomx) / width;
-  *yr = ((y - sy) / zoomy) / height;
+  *r_x = ((x - sx) / zoomx) / width;
+  *r_y = ((y - sy) / zoomy) / height;
 }
 
 void ED_image_point_pos__reverse(SpaceImage *sima,
diff --git a/source/blender/editors/space_image/space_image.c b/source/blender/editors/space_image/space_image.c
index a9cbebc5655..12a1dce3a5f 100644
--- a/source/blender/editors/space_image/space_image.c
+++ b/source/blender/editors/space_image/space_image.c
@@ -265,7 +265,7 @@ static void image_keymap(struct wmKeyConfig *keyconf)
 static bool image_drop_poll(bContext *C,
                             wmDrag *drag,
                             const wmEvent *event,
-                            const char **UNUSED(tooltip))
+                            const char **UNUSED(r_tooltip))
 {
   ScrArea *area = CTX_wm_area(C);
   if (ED_region_overlap_isect_any_xy(area, &event->x)) {
diff --git a/source/blender/editors/space_info/textview.c b/source/blender/editors/space_info/textview.c
index 19ada4779a0..c842fa8b4ac 100644
--- a/source/blender/editors/space_info/textview.c
+++ b/source/blender/editors/space_info/textview.c
@@ -102,28 +102,29 @@ static void textview_draw_sel(const char *str,
 }
 
 /**
- * \warning Allocated memory for 'offsets' must be freed by caller.
+ * \warning Allocated memory for 'r_offsets' must be freed by caller.
  * \return The length in bytes.
  */
-static int textview_wrap_offsets(const char *str, int len, int width, int *lines, int **offsets)
+static int textview_wrap_offsets(
+    const char *str, int len, int width, int *r_lines, int **r_offsets)
 {
   int i, end; /* Offset as unicode code-point. */
   int j;      /* Offset as bytes. */
 
-  *lines = 1;
+  *r_lines = 1;
 
-  *offsets = MEM_callocN(
-      sizeof(**offsets) *
+  *r_offsets = MEM_callocN(
+      sizeof(**r_offsets) *
           (len * BLI_UTF8_WIDTH_MAX / MAX2(1, width - (BLI_UTF8_WIDTH_MAX - 1)) + 1),
       __func__);
-  (*offsets)[0] = 0;
+  (*r_offsets)[0] = 0;
 
   for (i = 0, end = width, j = 0; j < len && str[j]; j += BLI_str_utf8_size_safe(str + j)) {
     int columns = BLI_str_utf8_char_width_safe(str + j);
 
     if (i + columns > end) {
-      (*offsets)[*lines] = j;
-      (*lines)++;
+      (*r_offsets)[*r_lines] = j;
+      (*r_lines)++;
 
       end = i + width;
     }
diff --git a/source/blender/editors/space_node/node_edit.c b/source/blender/editors/space_node/node_edit.c
index 9d81994bb0b..e50f5a818aa 100644
--- a/source/blender/editors/space_node/node_edit.c
+++ b/source/blender/editors/space_node/node_edit.c
@@ -819,7 +819,7 @@ static int edit_node_invoke_properties(bContext *C, wmOperator *op)
 }
 
 static void edit_node_properties_get(
-    wmOperator *op, bNodeTree *ntree, bNode **rnode, bNodeSocket **rsock, int *rin_out)
+    wmOperator *op, bNodeTree *ntree, bNode **r_node, bNodeSocket **r_sock, int *r_in_out)
 {
   bNode *node;
   bNodeSocket *sock = NULL;
@@ -842,14 +842,14 @@ static void edit_node_properties_get(
       break;
   }
 
-  if (rnode) {
-    *rnode = node;
+  if (r_node) {
+    *r_node = node;
   }
-  if (rsock) {
-    *rsock = sock;
+  if (r_sock) {
+    *r_sock = sock;
   }
-  if (rin_out) {
-    *rin_out = in_out;
+  if (r_in_out) {
+    *r_in_out = in_out;
   }
 }
 #endif
diff --git a/source/blender/editors/space_node/space_node.c b/source/blender/editors/space_node/space_node.c
index ce351595522..32007d5b971 100644
--- a/source/blender/editors/space_node/space_node.c
+++ b/source/blender/editors/space_node/space_node.c
@@ -635,7 +635,7 @@ static void node_main_region_draw(const bContext *C, ARegion *region)
 static bool node_ima_drop_poll(bContext *UNUSED(C),
                                wmDrag *drag,
                                const wmEvent *UNUSED(event),
-                               const char **UNUSED(tooltip))
+                               const char **UNUSED(r_tooltip))
 {
   if (drag->type == WM_DRAG_PATH) {
     /* rule might not work? */
@@ -649,7 +649,7 @@ static bool node_ima_drop_poll(bContext *UNUSED(C),
 static bool node_mask_drop_poll(bContext *UNUSED(C),
                                 wmDrag *drag,
                                 const wmEvent *UNUSED(event),
-                                const char **UNUSED(tooltip))
+                                const char **UNUSED(r_tooltip))
 {
   return WM_drag_ID(drag, ID_MSK) != NULL;
 }
diff --git a/source/blender/editors/space_outliner/outliner_dragdrop.c b/source/blender/editors/space_outliner/outliner_dragdrop.c
index 8aeeef277f7..6f071ca128e 100644
--- a/source/blender/editors/space_outliner/outliner_dragdrop.c
+++ b/source/blender/editors/space_outliner/outliner_dragdrop.c
@@ -291,7 +291,7 @@ static bool allow_parenting_without_modifier_key(SpaceOutliner *soops)
 static bool parent_drop_poll(bContext *C,
                              wmDrag *drag,
                              const wmEvent *event,
-                             const char **UNUSED(tooltip))
+                             const char **UNUSED(r_tooltip))
 {
   SpaceOutliner *soops = CTX_wm_space_outliner(C);
 
@@ -430,7 +430,7 @@ void OUTLINER_OT_parent_drop(wmOperatorType *ot)
 static bool parent_clear_poll(bContext *C,
                               wmDrag *drag,
                               const wmEvent *event,
-                              const char **UNUSED(tooltip))
+                              const char **UNUSED(r_tooltip))
 {
   SpaceOutliner *soops = CTX_wm_space_outliner(C);
 
@@ -516,7 +516,7 @@ void OUTLINER_OT_parent_clear(wmOperatorType *ot)
 static bool scene_drop_poll(bContext *C,
                             wmDrag *drag,
                             const wmEvent *event,
-                            const char **UNUSED(tooltip))
+                            const char **UNUSED(r_tooltip))
 {
   /* Ensure item under cursor is valid drop target */
   Object *ob = (Object *)WM_drag_ID(drag, ID_OB);
@@ -585,7 +585,7 @@ void OUTLINER_OT_scene_drop(wmOperatorType *ot)
 static bool material_drop_poll(bContext *C,
                                wmDrag *drag,
                                const wmEvent *event,
-                               const char **UNUSED(tooltip))
+                               const char **UNUSED(r_tooltip))
 {
   /* Ensure item under cursor is valid drop target */
   Material *ma = (Material *)WM_drag_ID(drag, ID_MA);
@@ -721,7 +721,7 @@ static bool collection_drop_init(bContext *C,
 static bool collection_drop_poll(bContext *C,
                                  wmDrag *drag,
                                  const wmEvent *event,
-                                 const char **tooltip)
+                                 const char **r_tooltip)
 {
   SpaceOutliner *soops = CTX_wm_space_outliner(C);
   ARegion *region = CTX_wm_region(C);
@@ -734,7 +734,7 @@ static bool collection_drop_poll(bContext *C,
     if (!data.from || event->ctrl) {
       tselem->flag |= TSE_DRAG_INTO;
       changed = true;
-      *tooltip = TIP_("Link inside Collection");
+      *r_tooltip = TIP_("Link inside Collection");
     }
     else {
       switch (data.insert_type) {
@@ -742,26 +742,26 @@ static bool collection_drop_poll(bContext *C,
           tselem->flag |= TSE_DRAG_BEFORE;
           changed = true;
           if (te->prev && outliner_is_collection_tree_element(te->prev)) {
-            *tooltip = TIP_("Move between collections");
+            *r_tooltip = TIP_("Move between collections");
           }
           else {
-            *tooltip = TIP_("Move before collection");
+            *r_tooltip = TIP_("Move before collection");
           }
           break;
         case TE_INSERT_AFTER:
           tselem->flag |= TSE_DRAG_AFTER;
           changed = true;
           if (te->next && outliner_is_collection_tree_element(te->next)) {
-            *tooltip = TIP_("Move between collections");
+            *r_tooltip = TIP_("Move between collections");
           }
           else {
-            *tooltip = TIP_("Move after collection");
+            *r_tooltip = TIP_("Move after collection");
           }
           break;
         case TE_INSERT_INTO:
           tselem->flag |= TSE_DRAG_INTO;
           changed = true;
-          *tooltip = TIP_("Move inside collection (Ctrl to link, Shift to parent)");
+          *r_tooltip = TIP_("Move inside collection (Ctrl to link, Shift to parent)");
           break;
       }
     }
diff --git a/source/blender/editors/space_sequencer/sequencer_draw.c b/source/blender/editors/space_sequencer/sequencer_draw.c
index 06158e6f1f4..0766996c00b 100644
--- a/source/blender/editors/space_sequencer/sequencer_draw.c
+++ b/source/blender/editors/space_sequencer/sequencer_draw.c
@@ -1368,68 +1368,68 @@ static void seq_prefetch_wm_notify(const bContext *C, Scene *scene)
 }
 
 static void *sequencer_OCIO_transform_ibuf(
-    const bContext *C, ImBuf *ibuf, bool *glsl_used, int *format, int *type)
+    const bContext *C, ImBuf *ibuf, bool *r_glsl_used, int *r_format, int *r_type)
 {
   void *display_buffer;
   void *cache_handle = NULL;
   bool force_fallback = false;
-  *glsl_used = false;
+  *r_glsl_used = false;
   force_fallback |= (ED_draw_imbuf_method(ibuf) != IMAGE_DRAW_METHOD_GLSL);
   force_fallback |= (ibuf->dither != 0.0f);
 
   if (force_fallback) {
     /* Fallback to CPU based color space conversion */
-    *glsl_used = false;
-    *format = GL_RGBA;
-    *type = GL_UNSIGNED_BYTE;
+    *r_glsl_used = false;
+    *r_format = GL_RGBA;
+    *r_type = GL_UNSIGNED_BYTE;
     display_buffer = NULL;
   }
   else if (ibuf->rect_float) {
     display_buffer = ibuf->rect_float;
 
     if (ibuf->channels == 4) {
-      *format = GL_RGBA;
+      *r_format = GL_RGBA;
     }
     else if (ibuf->channels == 3) {
-      *format = GL_RGB;
+      *r_format = GL_RGB;
     }
     else {
       BLI_assert(!"Incompatible number of channels for float buffer in sequencer");
-      *format = GL_RGBA;
+      *r_format = GL_RGBA;
       display_buffer = NULL;
     }
 
-    *type = GL_FLOAT;
+    *r_type = GL_FLOAT;
 
     if (ibuf->float_colorspace) {
-      *glsl_used = IMB_colormanagement_setup_glsl_draw_from_space_ctx(
+      *r_glsl_used = IMB_colormanagement_setup_glsl_draw_from_space_ctx(
           C, ibuf->float_colorspace, ibuf->dither, true);
     }
     else {
-      *glsl_used = IMB_colormanagement_setup_glsl_draw_ctx(C, ibuf->dither, true);
+      *r_glsl_used = IMB_colormanagement_setup_glsl_draw_ctx(C, ibuf->dither, true);
     }
   }
   else if (ibuf->rect) {
     display_buffer = ibuf->rect;
-    *format = GL_RGBA;
-    *type = GL_UNSIGNED_BYTE;
+    *r_format = GL_RGBA;
+    *r_type = GL_UNSIGNED_BYTE;
 
-    *glsl_used = IMB_colormanagement_setup_glsl_draw_from_space_ctx(
+    *r_glsl_used = IMB_colormanagement_setup_glsl_draw_from_space_ctx(
         C, ibuf->rect_colorspace, ibuf->dither, false);
   }
   else {
-    *format = GL_RGBA;
-    *type = GL_UNSIGNED_BYTE;
+    *r_format = GL_RGBA;
+    *r_type = GL_UNSIGNED_BYTE;
     display_buffer = NULL;
   }
 
   /* there's a data to be displayed, but GLSL is not initialized
    * properly, in this case we fallback to CPU-based display transform
    */
-  if ((ibuf->rect || ibuf->rect_float) && !*glsl_used) {
+  if ((ibuf->rect || ibuf->rect_float) && !*r_glsl_used) {
     display_buffer = IMB_display_buffer_acquire_ctx(C, ibuf, &cache_handle);
-    *format = GL_RGBA;
-    *type = GL_UNSIGNED_BYTE;
+    *r_format = GL_RGBA;
+    *r_type = GL_UNSIGNED_BYTE;
   }
   if (cache_handle) {
     IMB_display_buffer_release(cache_handle);
diff --git a/source/blender/editors/space_sequencer/sequencer_edit.c b/source/blender/editors/space_sequencer/sequencer_edit.c
index 3f36c844f30..71e63547eae 100644
--- a/source/blender/editors/space_sequencer/sequencer_edit.c
+++ b/source/blender/editors/space_sequencer/sequencer_edit.c
@@ -551,15 +551,15 @@ bool ED_space_sequencer_check_show_strip(SpaceSeq *sseq)
 int seq_effect_find_selected(Scene *scene,
                              Sequence *activeseq,
                              int type,
-                             Sequence **selseq1,
-                             Sequence **selseq2,
-                             Sequence **selseq3,
-                             const char **error_str)
+                             Sequence **r_selseq1,
+                             Sequence **r_selseq2,
+                             Sequence **r_selseq3,
+                             const char **r_error_str)
 {
   Editing *ed = BKE_sequencer_editing_get(scene, false);
   Sequence *seq1 = NULL, *seq2 = NULL, *seq3 = NULL, *seq;
 
-  *error_str = NULL;
+  *r_error_str = NULL;
 
   if (!activeseq) {
     seq2 = BKE_sequencer_active_get(scene);
@@ -568,7 +568,7 @@ int seq_effect_find_selected(Scene *scene,
   for (seq = ed->seqbasep->first; seq; seq = seq->next) {
     if (seq->flag & SELECT) {
       if (seq->type == SEQ_TYPE_SOUND_RAM && BKE_sequence_effect_get_num_inputs(type) != 0) {
-        *error_str = N_("Cannot apply effects to audio sequence strips");
+        *r_error_str = N_("Cannot apply effects to audio sequence strips");
         return 0;
       }
       if ((seq != activeseq) && (seq != seq2)) {
@@ -582,7 +582,7 @@ int seq_effect_find_selected(Scene *scene,
           seq3 = seq;
         }
         else {
-          *error_str = N_("Cannot apply effect to more than 3 sequence strips");
+          *r_error_str = N_("Cannot apply effect to more than 3 sequence strips");
           return 0;
         }
       }
@@ -599,11 +599,11 @@ int seq_effect_find_selected(Scene *scene,
 
   switch (BKE_sequence_effect_get_num_inputs(type)) {
     case 0:
-      *selseq1 = *selseq2 = *selseq3 = NULL;
+      *r_selseq1 = *r_selseq2 = *r_selseq3 = NULL;
       return 1; /* success */
     case 1:
       if (seq2 == NULL) {
-        *error_str = N_("At least one selected sequence strip is needed");
+        *r_error_str = N_("At least one selected sequence strip is needed");
         return 0;
       }
       if (seq1 == NULL) {
@@ -615,7 +615,7 @@ int seq_effect_find_selected(Scene *scene,
       ATTR_FALLTHROUGH;
     case 2:
       if (seq1 == NULL || seq2 == NULL) {
-        *error_str = N_("2 selected sequence strips are needed");
+        *r_error_str = N_("2 selected sequence strips are needed");
         return 0;
       }
       if (seq3 == NULL) {
@@ -625,13 +625,13 @@ int seq_effect_find_selected(Scene *scene,
   }
 
   if (seq1 == NULL && seq2 == NULL && seq3 == NULL) {
-    *error_str = N_("TODO: in what cases does this happen?");
+    *r_error_str = N_("TODO: in what cases does this happen?");
     return 0;
   }
 
-  *selseq1 = seq1;
-  *selseq2 = seq2;
-  *selseq3 = seq3;
+  *r_selseq1 = seq1;
+  *r_selseq2 = seq2;
+  *r_selseq3 = seq3;
 
   return 1;
 }
diff --git a/source/blender/editors/space_sequencer/sequencer_intern.h b/source/blender/editors/space_sequencer/sequencer_intern.h
index fe3170e10e0..f70bc06caf7 100644
--- a/source/blender/editors/space_sequencer/sequencer_intern.h
+++ b/source/blender/editors/space_sequencer/sequencer_intern.h
@@ -83,10 +83,10 @@ void recurs_sel_seq(struct Sequence *seqm);
 int seq_effect_find_selected(struct Scene *scene,
                              struct Sequence *activeseq,
                              int type,
-                             struct Sequence **selseq1,
-                             struct Sequence **selseq2,
-                             struct Sequence **selseq3,
-                             const char **error_str);
+                             struct Sequence **r_selseq1,
+                             struct Sequence **r_selseq2,
+                             struct Sequence **r_selseq3,
+                             const char **r_error_str);
 
 /* operator helpers */
 bool sequencer_edit_poll(struct bContext *C);
diff --git a/source/blender/editors/space_sequencer/space_sequencer.c b/source/blender/editors/space_sequencer/space_sequencer.c
index 21833bfda71..447bf27099d 100644
--- a/source/blender/editors/space_sequencer/space_sequencer.c
+++ b/source/blender/editors/space_sequencer/space_sequencer.c
@@ -363,7 +363,7 @@ static void sequencer_listener(wmWindow *UNUSED(win),
 static bool image_drop_poll(bContext *C,
                             wmDrag *drag,
                             const wmEvent *event,
-                            const char **UNUSED(tooltip))
+                            const char **UNUSED(r_tooltip))
 {
   ARegion *region = CTX_wm_region(C);
   Scene *scene = CTX_data_scene(C);
@@ -383,7 +383,7 @@ static bool image_drop_poll(bContext *C,
 static bool movie_drop_poll(bContext *C,
                             wmDrag *drag,
                             const wmEvent *event,
-                            const char **UNUSED(tooltip))
+                            const char **UNUSED(r_tooltip))
 {
   ARegion *region = CTX_wm_region(C);
   Scene *scene = CTX_data_scene(C);
@@ -402,7 +402,7 @@ static bool movie_drop_poll(bContext *C,
 static bool sound_drop_poll(bContext *C,
                             wmDrag *drag,
                             const wmEvent *event,
-                            const char **UNUSED(tooltip))
+                            const char **UNUSED(r_tooltip))
 {
   ARegion *region = CTX_wm_region(C);
   Scene *scene = CTX_data_scene(C);
diff --git a/source/blender/editors/space_text/space_text.c b/source/blender/editors/space_text/space_text.c
index 92b084a8d0d..d5379a4e76d 100644
--- a/source/blender/editors/space_text/space_text.c
+++ b/source/blender/editors/space_text/space_text.c
@@ -328,7 +328,7 @@ static void text_cursor(wmWindow *win, ScrArea *sa, ARegion *region)
 static bool text_drop_poll(bContext *UNUSED(C),
                            wmDrag *drag,
                            const wmEvent *UNUSED(event),
-                           const char **UNUSED(tooltip))
+                           const char **UNUSED(r_tooltip))
 {
   if (drag->type == WM_DRAG_PATH) {
     /* rule might not work? */
@@ -348,7 +348,7 @@ static void text_drop_copy(wmDrag *drag, wmDropBox *drop)
 static bool text_drop_paste_poll(bContext *UNUSED(C),
                                  wmDrag *drag,
                                  const wmEvent *UNUSED(event),
-                                 const char **UNUSED(tooltip))
+                                 const char **UNUSED(r_tooltip))
 {
   return (drag->type == WM_DRAG_ID);
 }
diff --git a/source/blender/editors/space_view3d/space_view3d.c b/source/blender/editors/space_view3d/space_view3d.c
index eb245ae0766..13c5bddd3bf 100644
--- a/source/blender/editors/space_view3d/space_view3d.c
+++ b/source/blender/editors/space_view3d/space_view3d.c
@@ -471,7 +471,7 @@ static bool view3d_drop_id_in_main_region_poll(bContext *C,
 static bool view3d_ob_drop_poll(bContext *C,
                                 wmDrag *drag,
                                 const wmEvent *event,
-                                const char **UNUSED(tooltip))
+                                const char **UNUSED(r_tooltip))
 {
   return view3d_drop_id_in_main_region_poll(C, drag, event, ID_OB);
 }
@@ -479,7 +479,7 @@ static bool view3d_ob_drop_poll(bContext *C,
 static bool view3d_collection_drop_poll(bContext *C,
                                         wmDrag *drag,
                                         const wmEvent *event,
-                                        const char **UNUSED(tooltip))
+                                        const char **UNUSED(r_tooltip))
 {
   return view3d_drop_id_in_main_region_poll(C, drag, event, ID_GR);
 }
@@ -487,7 +487,7 @@ static bool view3d_collection_drop_poll(bContext *C,
 static bool view3d_mat_drop_poll(bContext *C,
                                  wmDrag *drag,
                                  const wmEvent *event,
-                                 const char **UNUSED(tooltip))
+                                 const char **UNUSED(r_tooltip))
 {
   return view3d_drop_id_in_main_region_poll(C, drag, event, ID_MA);
 }
@@ -495,7 +495,7 @@ static bool view3d_mat_drop_poll(bContext *C,
 static bool view3d_ima_drop_poll(bContext *C,
                                  wmDrag *drag,
                                  const wmEvent *event,
-                                 const char **UNUSED(tooltip))
+                                 const char **UNUSED(r_tooltip))
 {
   if (ED_region_overlap_isect_any_xy(CTX_wm_area(C), &event->x)) {
     return false;
@@ -524,9 +524,9 @@ static bool view3d_ima_bg_is_camera_view(bContext *C)
 static bool view3d_ima_bg_drop_poll(bContext *C,
                                     wmDrag *drag,
                                     const wmEvent *event,
-                                    const char **tooltip)
+                                    const char **r_tooltip)
 {
-  if (!view3d_ima_drop_poll(C, drag, event, tooltip)) {
+  if (!view3d_ima_drop_poll(C, drag, event, r_tooltip)) {
     return false;
   }
 
@@ -540,9 +540,9 @@ static bool view3d_ima_bg_drop_poll(bContext *C,
 static bool view3d_ima_empty_drop_poll(bContext *C,
                                        wmDrag *drag,
                                        const wmEvent *event,
-                                       const char **tooltip)
+                                       const char **r_tooltip)
 {
-  if (!view3d_ima_drop_poll(C, drag, event, tooltip)) {
+  if (!view3d_ima_drop_poll(C, drag, event, r_tooltip)) {
     return false;
   }
 
@@ -562,7 +562,7 @@ static bool view3d_ima_empty_drop_poll(bContext *C,
 static bool view3d_volume_drop_poll(bContext *UNUSED(C),
                                     wmDrag *drag,
                                     const wmEvent *UNUSED(event),
-                                    const char **UNUSED(tooltip))
+                                    const char **UNUSED(r_tooltip))
 {
   return (drag->type == WM_DRAG_PATH) && (drag->icon == ICON_FILE_VOLUME);
 }
diff --git a/source/blender/editors/space_view3d/view3d_draw.c b/source/blender/editors/space_view3d/view3d_draw.c
index 8af651c7309..694cb7ee7d4 100644
--- a/source/blender/editors/space_view3d/view3d_draw.c
+++ b/source/blender/editors/space_view3d/view3d_draw.c
@@ -881,7 +881,7 @@ void ED_view3d_draw_depth(Depsgraph *depsgraph, ARegion *region, View3D *v3d, bo
 /* ******************** other elements ***************** */
 
 /** could move this elsewhere, but tied into #ED_view3d_grid_scale */
-float ED_scene_grid_scale(const Scene *scene, const char **grid_unit)
+float ED_scene_grid_scale(const Scene *scene, const char **r_grid_unit)
 {
   /* apply units */
   if (scene->unit.system) {
@@ -892,8 +892,8 @@ float ED_scene_grid_scale(const Scene *scene, const char **grid_unit)
 
     if (usys) {
       int i = bUnit_GetBaseUnit(usys);
-      if (grid_unit) {
-        *grid_unit = bUnit_GetNameDisplay(usys, i);
+      if (r_grid_unit) {
+        *r_grid_unit = bUnit_GetNameDisplay(usys, i);
       }
       return (float)bUnit_GetScaler(usys, i) / scene->unit.scale_length;
     }
@@ -902,9 +902,9 @@ float ED_scene_grid_scale(const Scene *scene, const char **grid_unit)
   return 1.0f;
 }
 
-float ED_view3d_grid_scale(const Scene *scene, View3D *v3d, const char **grid_unit)
+float ED_view3d_grid_scale(const Scene *scene, View3D *v3d, const char **r_grid_unit)
 {
-  return v3d->grid * ED_scene_grid_scale(scene, grid_unit);
+  return v3d->grid * ED_scene_grid_scale(scene, r_grid_unit);
 }
 
 #define STEPS_LEN 8
@@ -958,7 +958,7 @@ void ED_view3d_grid_steps(const Scene *scene,
 float ED_view3d_grid_view_scale(Scene *scene,
                                 View3D *v3d,
                                 RegionView3D *rv3d,
-                                const char **grid_unit)
+                                const char **r_grid_unit)
 {
   float grid_scale;
   if (!rv3d->is_persp && RV3D_VIEW_IS_AXIS(rv3d->view)) {
@@ -977,18 +977,18 @@ float ED_view3d_grid_view_scale(Scene *scene,
       }
     }
 
-    if (grid_unit) {
+    if (r_grid_unit) {
       const void *usys;
       int len;
       bUnit_GetSystem(scene->unit.system, B_UNIT_LENGTH, &usys, &len);
 
       if (usys) {
-        *grid_unit = bUnit_GetNameDisplay(usys, len - i - 1);
+        *r_grid_unit = bUnit_GetNameDisplay(usys, len - i - 1);
       }
     }
   }
   else {
-    grid_scale = ED_view3d_grid_scale(scene, v3d, grid_unit);
+    grid_scale = ED_view3d_grid_scale(scene, v3d, r_grid_unit);
   }
 
   return grid_scale;
diff --git a/source/blender/editors/space_view3d/view3d_view.c b/source/blender/editors/space_view3d/view3d_view.c
index 6e1533e50fd..30587e6084d 100644
--- a/source/blender/editors/space_view3d/view3d_view.c
+++ b/source/blender/editors/space_view3d/view3d_view.c
@@ -1557,7 +1557,7 @@ void VIEW3D_OT_localview_remove_from(wmOperatorType *ot)
 
 static uint free_localcollection_bit(Main *bmain,
                                      unsigned short local_collections_uuid,
-                                     bool *reset)
+                                     bool *r_reset)
 {
   ScrArea *sa;
   bScreen *sc;
@@ -1587,7 +1587,7 @@ static uint free_localcollection_bit(Main *bmain,
   /* Otherwise get the first free available. */
   for (int i = 0; i < 16; i++) {
     if ((local_view_bits & (1 << i)) == 0) {
-      *reset = true;
+      *r_reset = true;
       return (1 << i);
     }
   }
diff --git a/source/blender/editors/transform/transform_convert_sequencer.c b/source/blender/editors/transform/transform_convert_sequencer.c
index f6dc9b9c412..f2d0f4dfc43 100644
--- a/source/blender/editors/transform/transform_convert_sequencer.c
+++ b/source/blender/editors/transform/transform_convert_sequencer.c
@@ -47,7 +47,7 @@
  * seq->depth must be set before running this function so we know if the strips
  * are root level or not
  */
-static void SeqTransInfo(TransInfo *t, Sequence *seq, int *recursive, int *count, int *flag)
+static void SeqTransInfo(TransInfo *t, Sequence *seq, int *r_recursive, int *r_count, int *r_flag)
 {
   /* for extend we need to do some tricks */
   if (t->mode == TFM_TIME_EXTEND) {
@@ -60,51 +60,51 @@ static void SeqTransInfo(TransInfo *t, Sequence *seq, int *recursive, int *count
     int right = BKE_sequence_tx_get_final_right(seq, true);
 
     if (seq->depth == 0 && ((seq->flag & SELECT) == 0 || (seq->flag & SEQ_LOCK))) {
-      *recursive = false;
-      *count = 0;
-      *flag = 0;
+      *r_recursive = false;
+      *r_count = 0;
+      *r_flag = 0;
     }
     else if (seq->type == SEQ_TYPE_META) {
 
       /* for meta's we only ever need to extend their children, no matter what depth
        * just check the meta's are in the bounds */
       if (t->frame_side == 'R' && right <= cfra) {
-        *recursive = false;
+        *r_recursive = false;
       }
       else if (t->frame_side == 'L' && left >= cfra) {
-        *recursive = false;
+        *r_recursive = false;
       }
       else {
-        *recursive = true;
+        *r_recursive = true;
       }
 
-      *count = 1;
-      *flag = (seq->flag | SELECT) & ~(SEQ_LEFTSEL | SEQ_RIGHTSEL);
+      *r_count = 1;
+      *r_flag = (seq->flag | SELECT) & ~(SEQ_LEFTSEL | SEQ_RIGHTSEL);
     }
     else {
 
-      *recursive = false; /* not a meta, so no thinking here */
-      *count = 1;         /* unless its set to 0, extend will never set 2 handles at once */
-      *flag = (seq->flag | SELECT) & ~(SEQ_LEFTSEL | SEQ_RIGHTSEL);
+      *r_recursive = false; /* not a meta, so no thinking here */
+      *r_count = 1;         /* unless its set to 0, extend will never set 2 handles at once */
+      *r_flag = (seq->flag | SELECT) & ~(SEQ_LEFTSEL | SEQ_RIGHTSEL);
 
       if (t->frame_side == 'R') {
         if (right <= cfra) {
-          *count = *flag = 0;
+          *r_count = *r_flag = 0;
         } /* ignore */
         else if (left > cfra) {
         } /* keep the selection */
         else {
-          *flag |= SEQ_RIGHTSEL;
+          *r_flag |= SEQ_RIGHTSEL;
         }
       }
       else {
         if (left >= cfra) {
-          *count = *flag = 0;
+          *r_count = *r_flag = 0;
         } /* ignore */
         else if (right < cfra) {
         } /* keep the selection */
         else {
-          *flag |= SEQ_LEFTSEL;
+          *r_flag |= SEQ_LEFTSEL;
         }
       }
     }
@@ -121,28 +121,28 @@ static void SeqTransInfo(TransInfo *t, Sequence *seq, int *recursive, int *count
 
       /* Non nested strips (resect selection and handles) */
       if ((seq->flag & SELECT) == 0 || (seq->flag & SEQ_LOCK)) {
-        *recursive = false;
-        *count = 0;
-        *flag = 0;
+        *r_recursive = false;
+        *r_count = 0;
+        *r_flag = 0;
       }
       else {
         if ((seq->flag & (SEQ_LEFTSEL | SEQ_RIGHTSEL)) == (SEQ_LEFTSEL | SEQ_RIGHTSEL)) {
-          *flag = seq->flag;
-          *count = 2; /* we need 2 transdata's */
+          *r_flag = seq->flag;
+          *r_count = 2; /* we need 2 transdata's */
         }
         else {
-          *flag = seq->flag;
-          *count = 1; /* selected or with a handle selected */
+          *r_flag = seq->flag;
+          *r_count = 1; /* selected or with a handle selected */
         }
 
         /* Recursive */
 
         if ((seq->type == SEQ_TYPE_META) && ((seq->flag & (SEQ_LEFTSEL | SEQ_RIGHTSEL)) == 0)) {
           /* if any handles are selected, don't recurse */
-          *recursive = true;
+          *r_recursive = true;
         }
         else {
-          *recursive = false;
+          *r_recursive = false;
         }
       }
     }
@@ -150,23 +150,23 @@ static void SeqTransInfo(TransInfo *t, Sequence *seq, int *recursive, int *count
       /* Nested, different rules apply */
 
 #ifdef SEQ_TX_NESTED_METAS
-      *flag = (seq->flag | SELECT) & ~(SEQ_LEFTSEL | SEQ_RIGHTSEL);
-      *count = 1; /* ignore the selection for nested */
-      *recursive = (seq->type == SEQ_TYPE_META);
+      *r_flag = (seq->flag | SELECT) & ~(SEQ_LEFTSEL | SEQ_RIGHTSEL);
+      *r_count = 1; /* ignore the selection for nested */
+      *r_recursive = (seq->type == SEQ_TYPE_META);
 #else
       if (seq->type == SEQ_TYPE_META) {
         /* Meta's can only directly be moved between channels since they
          * don't have their start and length set directly (children affect that)
          * since this Meta is nested we don't need any of its data in fact.
          * BKE_sequence_calc() will update its settings when run on the top-level meta. */
-        *flag = 0;
-        *count = 0;
-        *recursive = true;
+        *r_flag = 0;
+        *r_count = 0;
+        *r_recursive = true;
       }
       else {
-        *flag = (seq->flag | SELECT) & ~(SEQ_LEFTSEL | SEQ_RIGHTSEL);
-        *count = 1; /* ignore the selection for nested */
-        *recursive = false;
+        *r_flag = (seq->flag | SELECT) & ~(SEQ_LEFTSEL | SEQ_RIGHTSEL);
+        *r_count = 1; /* ignore the selection for nested */
+        *r_recursive = false;
       }
 #endif
     }
diff --git a/source/blender/editors/uvedit/uvedit_draw.c b/source/blender/editors/uvedit/uvedit_draw.c
index e3504e20464..1e576f6fea4 100644
--- a/source/blender/editors/uvedit/uvedit_draw.c
+++ b/source/blender/editors/uvedit/uvedit_draw.c
@@ -478,9 +478,9 @@ static void draw_uvs(SpaceImage *sima,
 }
 
 static void draw_uv_shadows_get(
-    SpaceImage *sima, Object *ob, Object *obedit, bool *show_shadow, bool *show_texpaint)
+    SpaceImage *sima, Object *ob, Object *obedit, bool *r_show_shadow, bool *r_show_texpaint)
 {
-  *show_shadow = *show_texpaint = false;
+  *r_show_shadow = *r_show_texpaint = false;
 
   if (ED_space_image_show_render(sima) || (sima->flag & SI_NO_DRAW_TEXPAINT)) {
     return;
@@ -489,10 +489,10 @@ static void draw_uv_shadows_get(
   if ((sima->mode == SI_MODE_PAINT) && obedit && obedit->type == OB_MESH) {
     struct BMEditMesh *em = BKE_editmesh_from_object(obedit);
 
-    *show_shadow = EDBM_uv_check(em);
+    *r_show_shadow = EDBM_uv_check(em);
   }
 
-  *show_texpaint = (ob && ob->type == OB_MESH && ob->mode == OB_MODE_TEXTURE_PAINT);
+  *r_show_texpaint = (ob && ob->type == OB_MESH && ob->mode == OB_MODE_TEXTURE_PAINT);
 }
 
 void ED_uvedit_draw_main(SpaceImage *sima,
diff --git a/source/blender/editors/uvedit/uvedit_parametrizer.c b/source/blender/editors/uvedit/uvedit_parametrizer.c
index 5a36c83b62e..936ba750266 100644
--- a/source/blender/editors/uvedit/uvedit_parametrizer.c
+++ b/source/blender/editors/uvedit/uvedit_parametrizer.c
@@ -347,7 +347,7 @@ static PHashLink *phash_next(PHash *ph, PHashKey key, PHashLink *link)
 
 /* Geometry */
 
-static float p_vec_angle_cos(float *v1, float *v2, float *v3)
+static float p_vec_angle_cos(const float v1[3], const float v2[3], const float v3[3])
 {
   float d1[3], d2[3];
 
@@ -365,7 +365,7 @@ static float p_vec_angle_cos(float *v1, float *v2, float *v3)
   return d1[0] * d2[0] + d1[1] * d2[1] + d1[2] * d2[2];
 }
 
-static float p_vec_angle(float *v1, float *v2, float *v3)
+static float p_vec_angle(const float v1[3], const float v2[3], const float v3[3])
 {
   float dot = p_vec_angle_cos(v1, v2, v3);
 
@@ -380,7 +380,7 @@ static float p_vec_angle(float *v1, float *v2, float *v3)
   }
 }
 
-static float p_vec2_angle(float *v1, float *v2, float *v3)
+static float p_vec2_angle(const float v1[2], const float v2[2], const float v3[2])
 {
   float u1[3], u2[3], u3[3];
 
@@ -397,19 +397,20 @@ static float p_vec2_angle(float *v1, float *v2, float *v3)
   return p_vec_angle(u1, u2, u3);
 }
 
-static void p_triangle_angles(float *v1, float *v2, float *v3, float *a1, float *a2, float *a3)
+static void p_triangle_angles(
+    const float v1[3], const float v2[3], const float v3[3], float *r_a1, float *r_a2, float *r_a3)
 {
-  *a1 = p_vec_angle(v3, v1, v2);
-  *a2 = p_vec_angle(v1, v2, v3);
-  *a3 = (float)M_PI - *a2 - *a1;
+  *r_a1 = p_vec_angle(v3, v1, v2);
+  *r_a2 = p_vec_angle(v1, v2, v3);
+  *r_a3 = (float)M_PI - *r_a2 - *r_a1;
 }
 
-static void p_face_angles(PFace *f, float *a1, float *a2, float *a3)
+static void p_face_angles(PFace *f, float *r_a1, float *r_a2, float *r_a3)
 {
   PEdge *e1 = f->edge, *e2 = e1->next, *e3 = e2->next;
   PVert *v1 = e1->vert, *v2 = e2->vert, *v3 = e3->vert;
 
-  p_triangle_angles(v1->co, v2->co, v3->co, a1, a2, a3);
+  p_triangle_angles(v1->co, v2->co, v3->co, r_a1, r_a2, r_a3);
 }
 
 static float p_face_area(PFace *f)
@@ -420,7 +421,7 @@ static float p_face_area(PFace *f)
   return area_tri_v3(v1->co, v2->co, v3->co);
 }
 
-static float p_area_signed(float *v1, float *v2, float *v3)
+static float p_area_signed(const float v1[2], const float v2[2], const float v3[2])
 {
   return 0.5f * (((v2[0] - v1[0]) * (v3[1] - v1[1])) - ((v3[0] - v1[0]) * (v2[1] - v1[1])));
 }
@@ -527,7 +528,11 @@ static void UNUSED_FUNCTION(p_chart_uv_from_array)(PChart *chart, float (*points
   }
 }
 
-static PBool p_intersect_line_2d_dir(float *v1, float *dir1, float *v2, float *dir2, float *isect)
+static PBool p_intersect_line_2d_dir(const float v1[2],
+                                     const float dir1[2],
+                                     const float v2[2],
+                                     const float dir2[2],
+                                     float r_isect[2])
 {
   float lmbda, div;
 
@@ -538,14 +543,18 @@ static PBool p_intersect_line_2d_dir(float *v1, float *dir1, float *v2, float *d
   }
 
   lmbda = ((v1[1] - v2[1]) * dir1[0] - (v1[0] - v2[0]) * dir1[1]) / div;
-  isect[0] = v1[0] + lmbda * dir2[0];
-  isect[1] = v1[1] + lmbda * dir2[1];
+  r_isect[0] = v1[0] + lmbda * dir2[0];
+  r_isect[1] = v1[1] + lmbda * dir2[1];
 
   return P_TRUE;
 }
 
 #if 0
-static PBool p_intersect_line_2d(float *v1, float *v2, float *v3, float *v4, float *isect)
+static PBool p_intersect_line_2d(const float v1[2],
+                                 const float v2[2],
+                                 const float v3[2],
+                                 const float v4[2],
+                                 const float r_isect[2])
 {
   float dir1[2], dir2[2];
 
@@ -892,7 +901,7 @@ static PBool p_edge_implicit_seam(PEdge *e, PEdge *ep)
   return P_FALSE;
 }
 
-static PBool p_edge_has_pair(PHandle *handle, PEdge *e, PEdge **pair, PBool impl)
+static PBool p_edge_has_pair(PHandle *handle, PEdge *e, PBool impl, PEdge **r_pair)
 {
   PHashKey key;
   PEdge *pe;
@@ -906,7 +915,7 @@ static PBool p_edge_has_pair(PHandle *handle, PEdge *e, PEdge **pair, PBool impl
 
   key = PHASH_edge(key1, key2);
   pe = (PEdge *)phash_lookup(handle->hash_edges, key);
-  *pair = NULL;
+  *r_pair = NULL;
 
   while (pe) {
     if (pe != e) {
@@ -917,34 +926,34 @@ static PBool p_edge_has_pair(PHandle *handle, PEdge *e, PEdge **pair, PBool impl
           ((v1->u.key == key2) && (v2->u.key == key1))) {
 
         /* don't connect seams and t-junctions */
-        if ((pe->flag & PEDGE_SEAM) || *pair || (impl && p_edge_implicit_seam(e, pe))) {
-          *pair = NULL;
+        if ((pe->flag & PEDGE_SEAM) || *r_pair || (impl && p_edge_implicit_seam(e, pe))) {
+          *r_pair = NULL;
           return P_FALSE;
         }
 
-        *pair = pe;
+        *r_pair = pe;
       }
     }
 
     pe = (PEdge *)phash_next(handle->hash_edges, key, (PHashLink *)pe);
   }
 
-  if (*pair && (e->vert == (*pair)->vert)) {
-    if ((*pair)->next->pair || (*pair)->next->next->pair) {
+  if (*r_pair && (e->vert == (*r_pair)->vert)) {
+    if ((*r_pair)->next->pair || (*r_pair)->next->next->pair) {
       /* non unfoldable, maybe mobius ring or klein bottle */
-      *pair = NULL;
+      *r_pair = NULL;
       return P_FALSE;
     }
   }
 
-  return (*pair != NULL);
+  return (*r_pair != NULL);
 }
 
-static PBool p_edge_connect_pair(PHandle *handle, PEdge *e, PEdge ***stack, PBool impl)
+static PBool p_edge_connect_pair(PHandle *handle, PEdge *e, PBool impl, PEdge ***stack)
 {
   PEdge *pair = NULL;
 
-  if (!e->pair && p_edge_has_pair(handle, e, &pair, impl)) {
+  if (!e->pair && p_edge_has_pair(handle, e, impl, &pair)) {
     if (e->vert == pair->vert) {
       p_face_flip(pair->face);
     }
@@ -992,13 +1001,13 @@ static int p_connect_pairs(PHandle *handle, PBool impl)
       /* assign verts to charts so we can sort them later */
       f->u.chart = ncharts;
 
-      if (!p_edge_connect_pair(handle, e, &stack, impl)) {
+      if (!p_edge_connect_pair(handle, e, impl, &stack)) {
         e->vert->edge = e;
       }
-      if (!p_edge_connect_pair(handle, e1, &stack, impl)) {
+      if (!p_edge_connect_pair(handle, e1, impl, &stack)) {
         e1->vert->edge = e1;
       }
-      if (!p_edge_connect_pair(handle, e2, &stack, impl)) {
+      if (!p_edge_connect_pair(handle, e2, impl, &stack)) {
         e2->vert->edge = e2;
       }
     }
@@ -1255,16 +1264,16 @@ static PBool p_quad_split_direction(PHandle *handle, float **co, PHashKey *vkeys
 
 /* Construction: boundary filling */
 
-static void p_chart_boundaries(PChart *chart, int *nboundaries, PEdge **outer)
+static void p_chart_boundaries(PChart *chart, int *r_nboundaries, PEdge **r_outer)
 {
   PEdge *e, *be;
   float len, maxlen = -1.0;
 
-  if (nboundaries) {
-    *nboundaries = 0;
+  if (r_nboundaries) {
+    *r_nboundaries = 0;
   }
-  if (outer) {
-    *outer = NULL;
+  if (r_outer) {
+    *r_outer = NULL;
   }
 
   for (e = chart->edges; e; e = e->nextlink) {
@@ -1272,8 +1281,8 @@ static void p_chart_boundaries(PChart *chart, int *nboundaries, PEdge **outer)
       continue;
     }
 
-    if (nboundaries) {
-      (*nboundaries)++;
+    if (r_nboundaries) {
+      (*r_nboundaries)++;
     }
 
     len = 0.0f;
@@ -1285,8 +1294,8 @@ static void p_chart_boundaries(PChart *chart, int *nboundaries, PEdge **outer)
       be = be->next->vert->edge;
     } while (be != e);
 
-    if (outer && (len > maxlen)) {
-      *outer = e;
+    if (r_outer && (len > maxlen)) {
+      *r_outer = e;
       maxlen = len;
     }
   }
@@ -1427,7 +1436,7 @@ static void p_chart_fill_boundaries(PChart *chart, PEdge *outer)
 #if 0
 /* Polygon kernel for inserting uv's non overlapping */
 
-static int p_polygon_point_in(float *cp1, float *cp2, float *p)
+static int p_polygon_point_in(const float cp1[2], const float cp2[2], const float p[2])
 {
   if ((cp1[0] == p[0]) && (cp1[1] == p[1])) {
     return 2;
@@ -1443,43 +1452,43 @@ static int p_polygon_point_in(float *cp1, float *cp2, float *p)
 static void p_polygon_kernel_clip(float (*oldpoints)[2],
                                   int noldpoints,
                                   float (*newpoints)[2],
-                                  int *nnewpoints,
-                                  float *cp1,
-                                  float *cp2)
+                                  int *r_nnewpoints,
+                                  const float cp1[2],
+                                  const float cp2[2])
 {
   float *p2, *p1, isect[2];
   int i, p2in, p1in;
 
   p1 = oldpoints[noldpoints - 1];
   p1in = p_polygon_point_in(cp1, cp2, p1);
-  *nnewpoints = 0;
+  *r_nnewpoints = 0;
 
   for (i = 0; i < noldpoints; i++) {
     p2 = oldpoints[i];
     p2in = p_polygon_point_in(cp1, cp2, p2);
 
     if ((p2in >= 2) || (p1in && p2in)) {
-      newpoints[*nnewpoints][0] = p2[0];
-      newpoints[*nnewpoints][1] = p2[1];
-      (*nnewpoints)++;
+      newpoints[*r_nnewpoints][0] = p2[0];
+      newpoints[*r_nnewpoints][1] = p2[1];
+      (*r_nnewpoints)++;
     }
     else if (p1in && !p2in) {
       if (p1in != 3) {
         p_intersect_line_2d(p1, p2, cp1, cp2, isect);
-        newpoints[*nnewpoints][0] = isect[0];
-        newpoints[*nnewpoints][1] = isect[1];
-        (*nnewpoints)++;
+        newpoints[*r_nnewpoints][0] = isect[0];
+        newpoints[*r_nnewpoints][1] = isect[1];
+        (*r_nnewpoints)++;
       }
     }
     else if (!p1in && p2in) {
       p_intersect_line_2d(p1, p2, cp1, cp2, isect);
-      newpoints[*nnewpoints][0] = isect[0];
-      newpoints[*nnewpoints][1] = isect[1];
-      (*nnewpoints)++;
+      newpoints[*r_nnewpoints][0] = isect[0];
+      newpoints[*r_nnewpoints][1] = isect[1];
+      (*r_nnewpoints)++;
 
-      newpoints[*nnewpoints][0] = p2[0];
-      newpoints[*nnewpoints][1] = p2[1];
-      (*nnewpoints)++;
+      newpoints[*r_nnewpoints][0] = p2[0];
+      newpoints[*r_nnewpoints][1] = p2[1];
+      (*r_nnewpoints)++;
     }
 
     p1in = p2in;
@@ -1556,7 +1565,7 @@ static void p_polygon_kernel_center(float (*points)[2], int npoints, float *cent
 int NCOLLAPSE = 1;
 int NCOLLAPSEX = 0;
 
-static float p_vert_cotan(float *v1, float *v2, float *v3)
+static float p_vert_cotan(const float v1[3], const float v2[3], const float v3[3])
 {
   float a[3], b[3], c[3], clen;
 
@@ -1733,16 +1742,16 @@ static void p_vert_fix_edge_pointer(PVert *v)
   }
 }
 
-static void p_collapsing_verts(PEdge *edge, PEdge *pair, PVert **newv, PVert **keepv)
+static void p_collapsing_verts(PEdge *edge, PEdge *pair, PVert **r_newv, PVert **r_keepv)
 {
   /* the two vertices that are involved in the collapse */
   if (edge) {
-    *newv = edge->vert;
-    *keepv = edge->next->vert;
+    *r_newv = edge->vert;
+    *r_keepv = edge->next->vert;
   }
   else {
-    *newv = pair->next->vert;
-    *keepv = pair->vert;
+    *r_newv = pair->next->vert;
+    *r_keepv = pair->vert;
   }
 }
 
@@ -2107,20 +2116,20 @@ static float p_collapse_cost(PEdge *edge, PEdge *pair)
   return cost;
 }
 
-static void p_collapse_cost_vertex(PVert *vert, float *mincost, PEdge **mine)
+static void p_collapse_cost_vertex(PVert *vert, float *r_mincost, PEdge **r_mine)
 {
   PEdge *e, *enext, *pair;
 
-  *mine = NULL;
-  *mincost = 0.0f;
+  *r_mine = NULL;
+  *r_mincost = 0.0f;
   e = vert->edge;
   do {
     if (p_collapse_allowed(e, e->pair)) {
       float cost = p_collapse_cost(e, e->pair);
 
-      if ((*mine == NULL) || (cost < *mincost)) {
-        *mincost = cost;
-        *mine = e;
+      if ((*r_mine == NULL) || (cost < *r_mincost)) {
+        *r_mincost = cost;
+        *r_mine = e;
       }
     }
 
@@ -2133,9 +2142,9 @@ static void p_collapse_cost_vertex(PVert *vert, float *mincost, PEdge **mine)
       if (p_collapse_allowed(NULL, pair)) {
         float cost = p_collapse_cost(NULL, pair);
 
-        if ((*mine == NULL) || (cost < *mincost)) {
-          *mincost = cost;
-          *mine = pair;
+        if ((*r_mine == NULL) || (cost < *r_mincost)) {
+          *r_mincost = cost;
+          *r_mine = pair;
         }
       }
 
@@ -3549,7 +3558,7 @@ static int p_compare_geometric_uv(const void *a, const void *b)
   }
 }
 
-static PBool p_chart_convex_hull(PChart *chart, PVert ***verts, int *nverts, int *right)
+static PBool p_chart_convex_hull(PChart *chart, PVert ***r_verts, int *r_nverts, int *r_right)
 {
   /* Graham algorithm, taken from:
    * http://aspn.activestate.com/ASPN/Cookbook/Python/Recipe/117225 */
@@ -3608,9 +3617,9 @@ static PBool p_chart_convex_hull(PChart *chart, PVert ***verts, int *nverts, int
     *p = L[i];
   }
 
-  *verts = points;
-  *nverts = npoints;
-  *right = ulen - 1;
+  *r_verts = points;
+  *r_nverts = npoints;
+  *r_right = ulen - 1;
 
   MEM_freeN(U);
   MEM_freeN(L);
diff --git a/source/blender/editors/uvedit/uvedit_unwrap_ops.c b/source/blender/editors/uvedit/uvedit_unwrap_ops.c
index 0814407a553..8ded2c16be8 100644
--- a/source/blender/editors/uvedit/uvedit_unwrap_ops.c
+++ b/source/blender/editors/uvedit/uvedit_unwrap_ops.c
@@ -211,7 +211,7 @@ static bool uvedit_have_selection_multi(const Scene *scene,
 }
 
 void ED_uvedit_get_aspect(
-    const Scene *UNUSED(scene), Object *ob, BMesh *bm, float *aspx, float *aspy)
+    const Scene *UNUSED(scene), Object *ob, BMesh *bm, float *r_aspx, float *r_aspy)
 {
   bool sloppy = true;
   bool selected = false;
@@ -223,11 +223,11 @@ void ED_uvedit_get_aspect(
   if (efa) {
     ED_object_get_active_image(ob, efa->mat_nr + 1, &ima, NULL, NULL, NULL);
 
-    ED_image_get_uv_aspect(ima, NULL, aspx, aspy);
+    ED_image_get_uv_aspect(ima, NULL, r_aspx, r_aspy);
   }
   else {
-    *aspx = 1.0f;
-    *aspy = 1.0f;
+    *r_aspx = 1.0f;
+    *r_aspy = 1.0f;
   }
 }
 
@@ -422,21 +422,21 @@ static ParamHandle *construct_param_handle_multi(const Scene *scene,
   return handle;
 }
 
-static void texface_from_original_index(BMFace *efa,
+static void texface_from_original_index(const Scene *scene,
+                                        const int cd_loop_uv_offset,
+                                        BMFace *efa,
                                         int index,
-                                        float **uv,
-                                        ParamBool *pin,
-                                        ParamBool *select,
-                                        const Scene *scene,
-                                        const int cd_loop_uv_offset)
+                                        float **r_uv,
+                                        ParamBool *r_pin,
+                                        ParamBool *r_select)
 {
   BMLoop *l;
   BMIter liter;
   MLoopUV *luv;
 
-  *uv = NULL;
-  *pin = 0;
-  *select = 1;
+  *r_uv = NULL;
+  *r_pin = 0;
+  *r_select = 1;
 
   if (index == ORIGINDEX_NONE) {
     return;
@@ -445,9 +445,9 @@ static void texface_from_original_index(BMFace *efa,
   BM_ITER_ELEM (l, &liter, efa, BM_LOOPS_OF_FACE) {
     if (BM_elem_index_get(l->v) == index) {
       luv = BM_ELEM_CD_GET_VOID_P(l, cd_loop_uv_offset);
-      *uv = luv->uv;
-      *pin = (luv->flag & MLOOPUV_PINNED) ? 1 : 0;
-      *select = uvedit_uv_select_test(scene, l, cd_loop_uv_offset);
+      *r_uv = luv->uv;
+      *r_pin = (luv->flag & MLOOPUV_PINNED) ? 1 : 0;
+      *r_select = uvedit_uv_select_test(scene, l, cd_loop_uv_offset);
       break;
     }
   }
@@ -595,34 +595,34 @@ static ParamHandle *construct_param_handle_subsurfed(const Scene *scene,
     /* This is where all the magic is done.
      * If the vertex exists in the, we pass the original uv pointer to the solver, thus
      * flushing the solution to the edit mesh. */
-    texface_from_original_index(origFace,
+    texface_from_original_index(scene,
+                                cd_loop_uv_offset,
+                                origFace,
                                 origVertIndices[mloop[0].v],
                                 &uv[0],
                                 &pin[0],
-                                &select[0],
-                                scene,
-                                cd_loop_uv_offset);
-    texface_from_original_index(origFace,
+                                &select[0]);
+    texface_from_original_index(scene,
+                                cd_loop_uv_offset,
+                                origFace,
                                 origVertIndices[mloop[1].v],
                                 &uv[1],
                                 &pin[1],
-                                &select[1],
-                                scene,
-                                cd_loop_uv_offset);
-    texface_from_original_index(origFace,
+                                &select[1]);
+    texface_from_original_index(scene,
+                                cd_loop_uv_offset,
+                                origFace,
                                 origVertIndices[mloop[2].v],
                                 &uv[2],
                                 &pin[2],
-                                &select[2],
-                                scene,
-                                cd_loop_uv_offset);
-    texface_from_original_index(origFace,
+                                &select[2]);
+    texface_from_original_index(scene,
+                                cd_loop_uv_offset,
+                                origFace,
                                 origVertIndices[mloop[3].v],
                                 &uv[3],
                                 &pin[3],
-                                &select[3],
-                                scene,
-                                cd_loop_uv_offset);
+                                &select[3]);
 
     param_face_add(handle, key, 4, vkeys, co, uv, pin, select);
   }
diff --git a/source/blender/imbuf/IMB_colormanagement.h b/source/blender/imbuf/IMB_colormanagement.h
index 5f149f0ab71..1639fb4715f 100644
--- a/source/blender/imbuf/IMB_colormanagement.h
+++ b/source/blender/imbuf/IMB_colormanagement.h
@@ -199,8 +199,8 @@ void IMB_colormanagement_buffer_make_display_space(
 
 void IMB_colormanagement_display_settings_from_ctx(
     const struct bContext *C,
-    struct ColorManagedViewSettings **view_settings_r,
-    struct ColorManagedDisplaySettings **display_settings_r);
+    struct ColorManagedViewSettings **r_view_settings,
+    struct ColorManagedDisplaySettings **r_display_settings);
 
 const char *IMB_colormanagement_get_display_colorspace_name(
     const struct ColorManagedViewSettings *view_settings,
diff --git a/source/blender/imbuf/IMB_moviecache.h b/source/blender/imbuf/IMB_moviecache.h
index 175a18ef618..5fb158f0d8b 100644
--- a/source/blender/imbuf/IMB_moviecache.h
+++ b/source/blender/imbuf/IMB_moviecache.h
@@ -72,7 +72,7 @@ void IMB_moviecache_cleanup(struct MovieCache *cache,
                             void *userdata);
 
 void IMB_moviecache_get_cache_segments(
-    struct MovieCache *cache, int proxy, int render_flags, int *totseg_r, int **points_r);
+    struct MovieCache *cache, int proxy, int render_flags, int *r_totseg, int **r_points);
 
 struct MovieCacheIter;
 struct MovieCacheIter *IMB_moviecacheIter_new(struct MovieCache *cache);
diff --git a/source/blender/imbuf/intern/colormanagement.c b/source/blender/imbuf/intern/colormanagement.c
index a95db5c1de4..c57ab70f4e6 100644
--- a/source/blender/imbuf/intern/colormanagement.c
+++ b/source/blender/imbuf/intern/colormanagement.c
@@ -789,18 +789,18 @@ void colormanage_cache_free(ImBuf *ibuf)
 
 void IMB_colormanagement_display_settings_from_ctx(
     const bContext *C,
-    ColorManagedViewSettings **view_settings_r,
-    ColorManagedDisplaySettings **display_settings_r)
+    ColorManagedViewSettings **r_view_settings,
+    ColorManagedDisplaySettings **r_display_settings)
 {
   Scene *scene = CTX_data_scene(C);
   SpaceImage *sima = CTX_wm_space_image(C);
 
-  *view_settings_r = &scene->view_settings;
-  *display_settings_r = &scene->display_settings;
+  *r_view_settings = &scene->view_settings;
+  *r_display_settings = &scene->display_settings;
 
   if (sima && sima->image) {
     if ((sima->image->flag & IMA_VIEW_AS_RENDER) == 0) {
-      *view_settings_r = NULL;
+      *r_view_settings = NULL;
     }
   }
 }
diff --git a/source/blender/imbuf/intern/moviecache.c b/source/blender/imbuf/intern/moviecache.c
index f3b76288831..96ecbdce9cc 100644
--- a/source/blender/imbuf/intern/moviecache.c
+++ b/source/blender/imbuf/intern/moviecache.c
@@ -479,10 +479,10 @@ void IMB_moviecache_cleanup(MovieCache *cache,
 
 /* get segments of cached frames. useful for debugging cache policies */
 void IMB_moviecache_get_cache_segments(
-    MovieCache *cache, int proxy, int render_flags, int *totseg_r, int **points_r)
+    MovieCache *cache, int proxy, int render_flags, int *r_totseg, int **r_points)
 {
-  *totseg_r = 0;
-  *points_r = NULL;
+  *r_totseg = 0;
+  *r_points = NULL;
 
   if (!cache->getdatafp) {
     return;
@@ -497,8 +497,8 @@ void IMB_moviecache_get_cache_segments(
   }
 
   if (cache->points) {
-    *totseg_r = cache->totseg;
-    *points_r = cache->points;
+    *r_totseg = cache->totseg;
+    *r_points = cache->points;
   }
   else {
     int totframe = BLI_ghash_len(cache->hash);
@@ -555,8 +555,8 @@ void IMB_moviecache_get_cache_segments(
         }
       }
 
-      *totseg_r = totseg;
-      *points_r = points;
+      *r_totseg = totseg;
+      *r_points = points;
 
       cache->totseg = totseg;
       cache->points = points;
diff --git a/source/blender/python/generic/py_capi_utils.c b/source/blender/python/generic/py_capi_utils.c
index 35fff8699d1..9c84a4bb824 100644
--- a/source/blender/python/generic/py_capi_utils.c
+++ b/source/blender/python/generic/py_capi_utils.c
@@ -360,15 +360,15 @@ void PyC_StackSpit(void)
   }
 }
 
-void PyC_FileAndNum(const char **filename, int *lineno)
+void PyC_FileAndNum(const char **r_filename, int *r_lineno)
 {
   PyFrameObject *frame;
 
-  if (filename) {
-    *filename = NULL;
+  if (r_filename) {
+    *r_filename = NULL;
   }
-  if (lineno) {
-    *lineno = -1;
+  if (r_lineno) {
+    *r_lineno = -1;
   }
 
   if (!(frame = PyThreadState_GET()->frame)) {
@@ -376,13 +376,13 @@ void PyC_FileAndNum(const char **filename, int *lineno)
   }
 
   /* when executing a script */
-  if (filename) {
-    *filename = _PyUnicode_AsString(frame->f_code->co_filename);
+  if (r_filename) {
+    *r_filename = _PyUnicode_AsString(frame->f_code->co_filename);
   }
 
   /* when executing a module */
-  if (filename && *filename == NULL) {
-    /* try an alternative method to get the filename - module based
+  if (r_filename && *r_filename == NULL) {
+    /* try an alternative method to get the r_filename - module based
      * references below are all borrowed (double checked) */
     PyObject *mod_name = PyDict_GetItemString(PyEval_GetGlobals(), "__name__");
     if (mod_name) {
@@ -390,7 +390,7 @@ void PyC_FileAndNum(const char **filename, int *lineno)
       if (mod) {
         PyObject *mod_file = PyModule_GetFilenameObject(mod);
         if (mod_file) {
-          *filename = _PyUnicode_AsString(mod_name);
+          *r_filename = _PyUnicode_AsString(mod_name);
           Py_DECREF(mod_file);
         }
         else {
@@ -399,24 +399,24 @@ void PyC_FileAndNum(const char **filename, int *lineno)
       }
 
       /* unlikely, fallback */
-      if (*filename == NULL) {
-        *filename = _PyUnicode_AsString(mod_name);
+      if (*r_filename == NULL) {
+        *r_filename = _PyUnicode_AsString(mod_name);
       }
     }
   }
 
-  if (lineno) {
-    *lineno = PyFrame_GetLineNumber(frame);
+  if (r_lineno) {
+    *r_lineno = PyFrame_GetLineNumber(frame);
   }
 }
 
-void PyC_FileAndNum_Safe(const char **filename, int *lineno)
+void PyC_FileAndNum_Safe(const char **r_filename, int *r_lineno)
 {
   if (!PyC_IsInterpreterActive()) {
     return;
   }
 
-  PyC_FileAndNum(filename, lineno);
+  PyC_FileAndNum(r_filename, r_lineno);
 }
 
 /* Would be nice if python had this built in */
diff --git a/source/blender/python/generic/py_capi_utils.h b/source/blender/python/generic/py_capi_utils.h
index 5fb5737e1f9..e8b2e8ff502 100644
--- a/source/blender/python/generic/py_capi_utils.h
+++ b/source/blender/python/generic/py_capi_utils.h
@@ -38,8 +38,8 @@ PyObject *PyC_Err_SetString_Prefix(PyObject *exception_type_prefix, const char *
 
 void PyC_Err_PrintWithFunc(PyObject *py_func);
 
-void PyC_FileAndNum(const char **filename, int *lineno);
-void PyC_FileAndNum_Safe(const char **filename, int *lineno); /* checks python is running */
+void PyC_FileAndNum(const char **r_filename, int *r_lineno);
+void PyC_FileAndNum_Safe(const char **r_filename, int *r_lineno); /* checks python is running */
 int PyC_AsArray_FAST(void *array,
                      PyObject *value_fast,
                      const Py_ssize_t length,
diff --git a/source/blender/python/intern/bpy_rna.c b/source/blender/python/intern/bpy_rna.c
index e80c972e8bc..9579f78be30 100644
--- a/source/blender/python/intern/bpy_rna.c
+++ b/source/blender/python/intern/bpy_rna.c
@@ -5092,23 +5092,23 @@ static PyObject *pyrna_prop_collection_find(BPy_PropertyRNA *self, PyObject *key
 static bool foreach_attr_type(BPy_PropertyRNA *self,
                               const char *attr,
                               /* Values to assign. */
-                              RawPropertyType *raw_type,
-                              int *attr_tot,
-                              bool *attr_signed)
+                              RawPropertyType *r_raw_type,
+                              int *r_attr_tot,
+                              bool *r_attr_signed)
 {
   PropertyRNA *prop;
   bool attr_ok = true;
-  *raw_type = PROP_RAW_UNSET;
-  *attr_tot = 0;
-  *attr_signed = false;
+  *r_raw_type = PROP_RAW_UNSET;
+  *r_attr_tot = 0;
+  *r_attr_signed = false;
 
   /* Note: this is fail with zero length lists, so don't let this get caled in that case. */
   RNA_PROP_BEGIN (&self->ptr, itemptr, self->prop) {
     prop = RNA_struct_find_property(&itemptr, attr);
     if (prop) {
-      *raw_type = RNA_property_raw_type(prop);
-      *attr_tot = RNA_property_array_length(&itemptr, prop);
-      *attr_signed = (RNA_property_subtype(prop) != PROP_UNSIGNED);
+      *r_raw_type = RNA_property_raw_type(prop);
+      *r_attr_tot = RNA_property_array_length(&itemptr, prop);
+      *r_attr_signed = (RNA_property_subtype(prop) != PROP_UNSIGNED);
     }
     else {
       attr_ok = false;
@@ -5125,53 +5125,53 @@ static int foreach_parse_args(BPy_PropertyRNA *self,
                               PyObject *args,
 
                               /* Values to assign. */
-                              const char **attr,
-                              PyObject **seq,
-                              int *tot,
-                              int *size,
-                              RawPropertyType *raw_type,
-                              int *attr_tot,
-                              bool *attr_signed)
+                              const char **r_attr,
+                              PyObject **r_seq,
+                              int *r_tot,
+                              int *r_size,
+                              RawPropertyType *r_raw_type,
+                              int *r_attr_tot,
+                              bool *r_attr_signed)
 {
 #if 0
   int array_tot;
   int target_tot;
 #endif
 
-  *size = *attr_tot = 0;
-  *attr_signed = false;
-  *raw_type = PROP_RAW_UNSET;
+  *r_size = *r_attr_tot = 0;
+  *r_attr_signed = false;
+  *r_raw_type = PROP_RAW_UNSET;
 
-  if (!PyArg_ParseTuple(args, "sO:foreach_get/set", attr, seq)) {
+  if (!PyArg_ParseTuple(args, "sO:foreach_get/set", r_attr, r_seq)) {
     return -1;
   }
 
-  if (!PySequence_Check(*seq) && PyObject_CheckBuffer(*seq)) {
+  if (!PySequence_Check(*r_seq) && PyObject_CheckBuffer(*r_seq)) {
     PyErr_Format(
         PyExc_TypeError,
         "foreach_get/set expected second argument to be a sequence or buffer, not a %.200s",
-        Py_TYPE(*seq)->tp_name);
+        Py_TYPE(*r_seq)->tp_name);
     return -1;
   }
 
   /* TODO - buffer may not be a sequence! array.array() is though. */
-  *tot = PySequence_Size(*seq);
+  *r_tot = PySequence_Size(*r_seq);
 
-  if (*tot > 0) {
-    if (!foreach_attr_type(self, *attr, raw_type, attr_tot, attr_signed)) {
+  if (*r_tot > 0) {
+    if (!foreach_attr_type(self, *r_attr, r_raw_type, r_attr_tot, r_attr_signed)) {
       PyErr_Format(PyExc_AttributeError,
                    "foreach_get/set '%.200s.%200s[...]' elements have no attribute '%.200s'",
                    RNA_struct_identifier(self->ptr.type),
                    RNA_property_identifier(self->prop),
-                   *attr);
+                   *r_attr);
       return -1;
     }
-    *size = RNA_raw_type_sizeof(*raw_type);
+    *r_size = RNA_raw_type_sizeof(*r_raw_type);
 
 #if 0 /* Works fine, but not strictly needed. \
        * we could allow RNA_property_collection_raw_* to do the checks */
-    if ((*attr_tot) < 1) {
-      *attr_tot = 1;
+    if ((*r_attr_tot) < 1) {
+      *r_attr_tot = 1;
     }
 
     if (RNA_property_type(self->prop) == PROP_COLLECTION) {
@@ -5181,23 +5181,23 @@ static int foreach_parse_args(BPy_PropertyRNA *self,
       array_tot = RNA_property_array_length(&self->ptr, self->prop);
     }
 
-    target_tot = array_tot * (*attr_tot);
+    target_tot = array_tot * (*r_attr_tot);
 
     /* rna_access.c - rna_raw_access(...) uses this same method. */
-    if (target_tot != (*tot)) {
+    if (target_tot != (*r_tot)) {
       PyErr_Format(PyExc_TypeError,
                    "foreach_get(attr, sequence) sequence length mismatch given %d, needed %d",
-                   *tot,
+                   *r_tot,
                    target_tot);
       return -1;
     }
 #endif
   }
 
-  /* Check 'attr_tot' otherwise we don't know if any values were set.
+  /* Check 'r_attr_tot' otherwise we don't know if any values were set.
    * This isn't ideal because it means running on an empty list may
    * fail silently when it's not compatible. */
-  if (*size == 0 && *attr_tot != 0) {
+  if (*r_size == 0 && *r_attr_tot != 0) {
     PyErr_SetString(PyExc_AttributeError, "attribute does not support foreach method");
     return -1;
   }
diff --git a/source/blender/python/intern/bpy_rna_array.c b/source/blender/python/intern/bpy_rna_array.c
index 29e3a07625a..1e5b53b819e 100644
--- a/source/blender/python/intern/bpy_rna_array.c
+++ b/source/blender/python/intern/bpy_rna_array.c
@@ -262,7 +262,7 @@ static int validate_array_length(PyObject *rvalue,
                                  PointerRNA *ptr,
                                  PropertyRNA *prop,
                                  int lvalue_dim,
-                                 int *totitem,
+                                 int *r_totitem,
                                  const char *error_prefix)
 {
   int dimsize[MAX_ARRAY_DIMENSION];
@@ -296,7 +296,7 @@ static int validate_array_length(PyObject *rvalue,
         return -1;
       }
 #else
-      *totitem = tot;
+      *r_totitem = tot;
       return 0;
 
 #endif
@@ -346,7 +346,7 @@ static int validate_array_length(PyObject *rvalue,
     }
   }
 
-  *totitem = len;
+  *r_totitem = len;
 
   return 0;
 }
@@ -357,7 +357,7 @@ static int validate_array(PyObject *rvalue,
                           int lvalue_dim,
                           ItemTypeCheckFunc check_item_type,
                           const char *item_type_str,
-                          int *totitem,
+                          int *r_totitem,
                           const char *error_prefix)
 {
   int dimsize[MAX_ARRAY_DIMENSION];
@@ -405,7 +405,7 @@ static int validate_array(PyObject *rvalue,
         return -1;
       }
       else {
-        *totitem = dimsize[0] * dimsize[1];
+        *r_totitem = dimsize[0] * dimsize[1];
         return 0;
       }
     }
@@ -425,7 +425,7 @@ static int validate_array(PyObject *rvalue,
       return -1;
     }
 
-    return validate_array_length(rvalue, ptr, prop, lvalue_dim, totitem, error_prefix);
+    return validate_array_length(rvalue, ptr, prop, lvalue_dim, r_totitem, error_prefix);
   }
 }