Redefine only if empty - Winamp & Shoutcast Forums

		Winamp & Shoutcast Forums > Developer Center > NSIS Discussion
Redefine only if empty

9th December 2015, 21:17

Anders

Moderator

Join Date: Jun 2002

Location: ${NSISDIR}

Posts: 5,442

NSIS treats "" as 0 in math operations so you can add 0 to the input:

Quote:

!define /redef /math INSTALLER_SERVICEPACK_STRING "${INSTALLER_SERVICEPACK_STRING}" + 0

IntOp $PostCount $PostCount + 1

		Winamp & Shoutcast Forums > Developer Center > NSIS Discussion
Redefine only if empty

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