Prompt sigil uses shift not arithmetic.

tcshrc.prompt.defs

@@ -15,12 +15,14 @@ if( ! $?unknown_tty ) then
 endif
 
 
+set reference_colors=()
+set referencechars=()
 
 # R G Y B C M
-set reference_colors=( ${csi}91m ${csi}92m ${csi}93m ${csi}38\;5\;33m ${csi}95m ${csi}96m )
+set reference_colors_original=( ${csi}91m ${csi}92m ${csi}93m ${csi}38\;5\;33m ${csi}95m ${csi}96m )
 
 # R G Y B M
-#set reference_colors=( ${csi}91m ${csi}92m ${csi}93m ${csi}38\;5\;33m ${csi}96m )
+#set reference_colors_original=( ${csi}91m ${csi}92m ${csi}93m ${csi}38\;5\;33m ${csi}96m )
 
 # Select a set of Unicode codepoints for prompt referencing...
 set referencechars_raw=""
@@ -101,19 +103,17 @@ set referencechars_raw="${referencechars_raw} 2620"
 #set referencechars_raw="${referencechars_raw} 2615"
 
 #echo ${referencechars[1]}
-set prompt_hcolor=0
-set prompt_hsym=0
 
 _debug "Building unicode sigils table...."
 if( ! $?CSHENV_NO_UNICODE_PRINTF ) then
-	set referencechars=()
+	set referencechars_original=()
 	foreach ch ($referencechars_raw)
 		set unicode=`printf "\\u${ch}"`
-		set referencechars=( $referencechars `printf "${unicode}"` )
+		set referencechars_original=( $referencechars_original `printf "${unicode}"` )
 	end
 else
 	# Safe fallback for when there's no unicode printf
-	set referencechars="A B C D X Y Z"
+	set referencechars_original="A B C D X Y Z"
 endif
 _debug "Done building unicode sigils table"
 

tcshrc.prompt.final

@@ -62,67 +62,57 @@ _debug "Done with color cacheing loop"
 _debug "Dynamic color loading processed..."
 
 
-
-if( ${prompt_hcolor} != 0 ) then
-    set last_color = ${reference_colors[${prompt_hcolor}]}
-endif
-if( ${prompt_hsym} != 0 ) then
-    set last_sym = ${referencechars[${prompt_hsym}]}
-endif
-
-@ prompt_hcolor = $prompt_hcolor % ${#reference_colors}
-@ prompt_hsym = $prompt_hsym % ${#referencechars}
-
-
-while( ${prompt_hcolor} == 0 )
+while( ${#reference_colors} == 0 )
 	_debug colorshuffle
     #echo 
     # Shuffle, if supported
     if( $?cshenv_detected_shuf ) then
-        set reference_colors=`shuf -e $reference_colors`
+        set reference_colors=`shuf -e $reference_colors_original`
     else
         #echo "FALLBACK COLOR!"
-        set reference_colors=`echo $reference_colors | tr " " "\n" | sort -R | xargs`
+        set reference_colors=`echo $reference_colors_original | tr " " "\n" | sort -R | xargs`
     endif
     if( ! $?last_color ) then
         break
     endif
     set first_color = ${reference_colors[1]}
-    if( ${first_color} != ${last_color} ) then
-        break
+    if( ${first_color} == ${last_color} ) then
+		set reference_colors=()
+        continue
     endif
 end
     
 
-while( ${prompt_hsym} == 0 )
+while( ${#referencechars} == 0 )
 	_debug symbolshuffle
     #echo 
     if( $?cshenv_detected_shuf ) then
-        set referencechars=`shuf -e $referencechars`
-        #set reference_colors=`shuf -e $reference_colors`
+        set referencechars=`shuf -e $referencechars_original`
     else
         #echo "FALLBACK CHAR!"
-        set referencechars=`echo $referencechars | tr " " "\n" | sort -R | xargs`
+        set referencechars=(`echo $referencechars_original | tr " " "\n" | sort -R | xargs`)
     endif
     if( ! $?last_sym ) then
         break
     endif
     set first_sym = ${referencechars[1]}
-    if( ${first_sym} != ${last_sym} ) then
-        break
+    if( ${first_sym} == ${last_sym} ) then
+		set referencechars=()
+        continue
     endif
 end
 
-@ prompt_hcolor = ${prompt_hcolor} + 1
-@ prompt_hsym = ${prompt_hsym} + 1
-
 if( $?CSHENV_DEBUG ) then
-    _debug ${prompt_hcolor} ${prompt_hsym}
+    _debug ${reference_colors[1]} ${referencechars[1]}
     _debug "Setting prompt"
 endif
 
+set last_color = ${reference_colors[1]}
+set last_sym = ${referencechars[1]}
 
-set prompt_reference_core="%{${reference_colors[${prompt_hcolor}]}%}${referencechars[${prompt_hsym}]}"
+set prompt_reference_core="%{${last_color}%}${last_sym}"
+shift reference_colors
+shift referencechars
 #if( ${referencechars[${prompt_hsym}]} == `env LC_ALL=C.UTF-8 printf "\u2328"` ) then
 #    set prompt_reference="%{${dim}%}<${prompt_reference_core}  %{${dim}%}> "
 #else