extract CallArtificialFunction to Util.nsh

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@5780 212acab6-be3b-0410-9dea-997c60f758d6

Include/Util.nsh

@@ -0,0 +1,35 @@
+; ---------------------
+;       Util.nsh
+; ---------------------
+;
+; Voodoo macros to make end-user usage easier. This may be documented someday.
+
+!verbose push
+!verbose 3
+
+!ifndef ___UTIL__NSH___
+!define ___UTIL__NSH___
+
+# see WinVer.nsh and *Func.nsh for usage examples
+!macro CallArtificialFunction NAME
+  !ifndef __UNINSTALL__
+    !define CallArtificialFunction_TYPE inst
+  !else
+    !define CallArtificialFunction_TYPE uninst
+  !endif
+  Call :.${NAME}${CallArtificialFunction_TYPE}
+  !ifndef ${NAME}${CallArtificialFunction_TYPE}_DEFINED
+    Goto ${NAME}${CallArtificialFunction_TYPE}_DONE
+    !define ${NAME}${CallArtificialFunction_TYPE}_DEFINED
+    .${NAME}${CallArtificialFunction_TYPE}:
+      !insertmacro ${NAME}
+    Return
+    ${NAME}${CallArtificialFunction_TYPE}_DONE:
+  !endif
+  !undef CallArtificialFunction_TYPE
+!macroend
+!define CallArtificialFunction `!insertmacro CallArtificialFunction`
+
+!endif # !___UTIL__NSH___
+
+!verbose pop