[Coder API's]: Added a "generic unique name-finding function".

Basically, this is based on the behaviour of the unique_constraint_name (or equivilant) functions, which have traditionally been duplicated everytime a new datatype needed this.

Currently, this is in use for the following things:
* Constraints
* Action/Bone Groups
* Local Action Markers / PoseLib poses

Usage Notes:
* The file in which this is to be used should include the standard header file <stddef.h>. This defines the offsetof() macro, which should be used to find the relative location of the "name" member of the structs
* This function is only designed for names of up to 128 chars in length (Most names are at most 32. TimeMarkers are 64). If a longer string needs to be handled, the function will need to be modified accordingly. 
* defname is the default name that should be used in case one hasn't been specified already

source/blender/blenkernel/intern/constraint.c

@@ -31,6 +31,7 @@
  */
 
 #include <stdio.h> 
+#include <stddef.h>
 #include <string.h>
 #include <math.h>
 
@@ -226,55 +227,7 @@ void do_constraint_channels (ListBase *conbase, ListBase *chanbase, float ctime,
 /* Find the first available, non-duplicate name for a given constraint */
 void unique_constraint_name (bConstraint *con, ListBase *list)
 {
-	bConstraint *curcon;
-	char tempname[64];
-	int	number = 1, exists = 0;
-	char *dot;
-	
-	/* See if we are given an empty string */
-	if (con->name[0] == '\0') {
-		/* give it default name first */
-		strcpy(con->name, "Const");
-	}
-	
-	/* See if we even need to do this */
-	if (list == NULL)
-		return;
-	
-	for (curcon = list->first; curcon; curcon=curcon->next) {
-		if (curcon != con) {
-			if (!strcmp(curcon->name, con->name)) {
-				exists = 1;
-				break;
-			}
-		}
-	}
-	
-	if (exists == 0)
-		return;
-
-	/*	Strip off the suffix */
-	dot = strchr(con->name, '.');
-	if (dot)
-		*dot=0;
-	
-	for (number = 1; number <= 999; number++) {
-		sprintf(tempname, "%s.%03d", con->name, number);
-		
-		exists = 0;
-		for (curcon=list->first; curcon; curcon=curcon->next) {
-			if (con != curcon) {
-				if (strcmp(curcon->name, tempname)==0) {
-					exists = 1;
-					break;
-				}
-			}
-		}
-		if (exists == 0) {
-			strcpy(con->name, tempname);
-			return;
-		}
-	}
+	BLI_uniquename(list, con, "Const", offsetof(bConstraint, name), 32);
 }
 
 /* ----------------- Evaluation Loop Preparation --------------- */

source/blender/blenlib/BLI_blenlib.h

@@ -107,6 +107,7 @@ int BLI_findindex(struct ListBase *listbase, void *vlink);
 void BLI_freelistN(struct ListBase *listbase);
 void BLI_addtail(struct ListBase *listbase, void *vlink);
 void BLI_remlink(struct ListBase *listbase, void *vlink);
+void BLI_uniquename(struct ListBase *list, void *vlink, char defname[], short name_offs, short len);
 void BLI_newname(char * name, int add);
 int BLI_stringdec(char *string, char *kop, char *start, unsigned short *numlen);
 void BLI_stringenc(char *string, char *kop, char *start, unsigned short numlen, int pic);

source/blender/blenlib/intern/util.c

@@ -220,6 +220,79 @@ void BLI_newname(char *name, int add)
 	BLI_stringenc(name, head, tail, digits, pic);
 }
 
+/* little helper macro for BLI_uniquename */
+#ifndef GIVE_STRADDR
+	#define GIVE_STRADDR(data, offset) ( ((char *)data) + offset )
+#endif
+
+/* Generic function to set a unique name. It is only designed to be used in situations
+ * where the name is part of the struct, and also that the name is at most 128 chars long.
+ * 
+ * For places where this is used, see constraint.c for example...
+ *
+ * 	name_offs: should be calculated using offsetof(structname, membername) macro from stddef.h
+ *	len: maximum length of string (to prevent overflows, etc.)
+ *	defname: the name that should be used by default if none is specified already
+ */
+void BLI_uniquename(ListBase *list, void *vlink, char defname[], short name_offs, short len)
+{
+	Link *link;
+	char tempname[128];
+	int	number = 1, exists = 0;
+	char *dot;
+	
+	/* Make sure length can be handled */
+	if ((len < 0) || (len > 128))
+		return;
+	
+	/* See if we are given an empty string */
+	if (ELEM(NULL, vlink, defname))
+		return;
+	
+	if (GIVE_STRADDR(vlink, name_offs) == '\0') {
+		/* give it default name first */
+		BLI_strncpy(GIVE_STRADDR(vlink, name_offs), defname, len);
+	}
+	
+	/* See if we even need to do this */
+	if (list == NULL)
+		return;
+	
+	for (link = list->first; link; link= link->next) {
+		if (link != vlink) {
+			if (!strcmp(GIVE_STRADDR(link, name_offs), GIVE_STRADDR(vlink, name_offs))) {
+				exists = 1;
+				break;
+			}
+		}
+	}
+	if (exists == 0)
+		return;
+
+	/* Strip off the suffix */
+	dot = strchr(GIVE_STRADDR(vlink, name_offs), '.');
+	if (dot)
+		*dot=0;
+	
+	for (number = 1; number <= 999; number++) {
+		BLI_snprintf(tempname, 128, "%s.%03d", GIVE_STRADDR(vlink, name_offs), number);
+		
+		exists = 0;
+		for (link= list->first; link; link= link->next) {
+			if (vlink != link) {
+				if (!strcmp(GIVE_STRADDR(link, name_offs), tempname)) {
+					exists = 1;
+					break;
+				}
+			}
+		}
+		if (exists == 0) {
+			BLI_strncpy(GIVE_STRADDR(vlink, name_offs), tempname, len);
+			return;
+		}
+	}
+}
+
 
 void BLI_addhead(ListBase *listbase, void *vlink)
 {

source/blender/src/buttons_editing.c

@@ -3864,6 +3864,7 @@ void do_armbuts(unsigned short event)
 			grp= MEM_callocN(sizeof(bActionGroup), "PoseGroup");
 			strcpy(grp->name, "Group");
 			BLI_addtail(&pose->agroups, grp);
+			BLI_uniquename(&pose->agroups, grp, "Group", offsetof(bActionGroup, name), 32);
 			
 			pose->active_group= BLI_countlist(&pose->agroups);
 			
@@ -5050,6 +5051,22 @@ char *get_vertexgroup_menustr(Object *ob)
 	return menustr;
 }
 
+static void verify_poselib_posename(void *arg1, void *arg2)
+{
+	bAction *act= (bAction *)arg1;
+	TimeMarker *marker= (TimeMarker *)arg2;
+	
+	BLI_uniquename(&act->markers, marker, "Pose", offsetof(TimeMarker, name), 64);
+}
+
+static void verify_posegroup_groupname(void *arg1, void *arg2)
+{
+	bPose *pose= (bPose *)arg1;
+	bActionGroup *grp= (bActionGroup *)arg2;
+	
+	BLI_uniquename(&pose->agroups, grp, "Group", offsetof(bActionGroup, name), 32);
+}
+
 static void editing_panel_links(Object *ob)
 {
 	uiBlock *block;
@@ -5165,7 +5182,8 @@ static void editing_panel_links(Object *ob)
 						if (act->active_marker) {
 							TimeMarker *marker= poselib_get_active_pose(act);
 							
-							uiDefBut(block, TEX, REDRAWBUTSEDIT,"",		xco+18,85,160-18-20,20, marker->name, 0, 63, 0, 0, "Displays current Pose Library Pose name. Click to change.");
+							but= uiDefBut(block, TEX, REDRAWBUTSEDIT,"",		xco+18,85,160-18-20,20, marker->name, 0, 63, 0, 0, "Displays current Pose Library Pose name. Click to change.");
+							uiButSetFunc(but, verify_poselib_posename, act, marker);
 							uiDefIconBut(block, BUT, B_POSELIB_REMOVEP, VICON_X, xco+160-20, 85, 20, 20, NULL, 0.0, 0.0, 0.0, 0.0, "Remove this Pose Library Pose from Pose Library.");
 						}
 					}
@@ -5198,7 +5216,8 @@ static void editing_panel_links(Object *ob)
 						bActionGroup *grp= (bActionGroup *)BLI_findlink(&pose->agroups, pose->active_group-1);
 						
 						/* active group */
-						uiDefBut(block, TEX, REDRAWBUTSEDIT,"",		xco+18,85,140-18-20,20, grp->name, 0, 63, 0, 0, "Displays current Pose Group name. Click to change.");
+						but= uiDefBut(block, TEX, REDRAWBUTSEDIT,"",		xco+18,85,140-18-20,20, grp->name, 0, 63, 0, 0, "Displays current Pose Group name. Click to change.");
+						uiButSetFunc(but, verify_posegroup_groupname, pose, grp); 
 						uiDefIconBut(block, BUT, B_POSEGRP_REMOVE, VICON_X, xco+140-20, 85, 20, 20, NULL, 0.0, 0.0, 0.0, 0.0, "Remove this Pose Group");
 						
 						/* set custom color set */

source/blender/src/editaction.c

@@ -31,6 +31,7 @@
  */
 
 #include <string.h>
+#include <stddef.h>
 #include <math.h>
 
 #include "MEM_guardedalloc.h"
@@ -947,6 +948,7 @@ void action_groups_group (short add_group)
 		sprintf(agrp->name, "Group");
 		
 		BLI_addtail(&act->groups, agrp);
+		BLI_uniquename(&act->groups, agrp, "Group", offsetof(bActionGroup, name), 32);
 		
 		set_active_actiongroup(act, agrp, 1);
 		
@@ -2140,6 +2142,7 @@ static void numbuts_action ()
 		}
 		else if (agrp) {
 			strcpy(agrp->name, str);
+			BLI_uniquename(&( ((bAction *)data)->groups ), agrp, "Group", offsetof(bActionGroup, name), 32);
 			
 			if (expand) agrp->flag |= AGRP_EXPANDED;
 			else agrp->flag &= ~AGRP_EXPANDED;
@@ -3724,6 +3727,9 @@ void action_add_localmarker (bAction *act, int frame)
 		BLI_addtail(&act->markers, marker);
 	}
 	
+	/* validate the name */
+	BLI_uniquename(&act->markers, marker, "Pose", offsetof(TimeMarker, name), 64);
+	
 	/* sets the newly added marker as the active one */
 	action_set_activemarker(act, marker, 1);
 	
@@ -3758,8 +3764,9 @@ void action_rename_localmarker (bAction *act)
 	if (sbutton(name, 0, sizeof(name)-1, "Name: ") == 0)
 		return;
 	
-	/* copy name */
+	/* copy then validate name */
 	BLI_strncpy(marker->name, name, sizeof(marker->name));
+	BLI_uniquename(&act->markers, marker, "Pose", offsetof(TimeMarker, name), 64);
 	
 	/* undo and update */
 	BIF_undo_push("Action Rename Marker");

source/blender/src/poselib.c

@@ -27,6 +27,7 @@
  
 #include <stdlib.h>
 #include <stdio.h>
+#include <stddef.h>
 #include <string.h>
 #include <math.h>
 
@@ -345,7 +346,7 @@ void poselib_add_current_pose (Object *ob, int val)
 		/* get/initialise poselib */
 		act= poselib_validate(ob);
 		
-		/* validate name and get frame */
+		/* get frame */
 		frame= poselib_get_free_index(act);
 		
 		/* add pose to poselib - replaces any existing pose there */
@@ -363,6 +364,9 @@ void poselib_add_current_pose (Object *ob, int val)
 			
 			BLI_addtail(&act->markers, marker);
 		}
+		
+		/* validate name */
+		BLI_uniquename(&act->markers, marker, "Pose", offsetof(TimeMarker, name), 64);
 	}	
 	
 	/* loop through selected posechannels, keying their pose to the action */
@@ -504,8 +508,9 @@ void poselib_rename_pose (Object *ob)
 	if (sbutton(name, 0, sizeof(name)-1, "Name: ") == 0)
 		return;
 	
-	/* copy name */
+	/* copy name and validate it */
 	BLI_strncpy(marker->name, name, sizeof(marker->name));
+	BLI_uniquename(&act->markers, marker, "Pose", offsetof(TimeMarker, name), 64);
 	
 	/* undo and update */
 	BIF_undo_push("PoseLib Rename Pose");