View source for SetReqStrLen: Allow compile w/ 8192 special build only

{{PageAuthor|Afrow UK}}

== Description ==
Currently (at time of writing) you can't change NSIS_MAX_STRLEN without re-compiling NSIS (or by downloading a special makensis.exe build from the [http://nsis.sourceforge.net/download/specialbuilds/ Special Builds] page).
This was a problem because some NSIS projects would require the special build and some wouldn't, and sometimes we'd compile a project that required the special build, with the normal MakeNSIS build.

This cool snippet of code will stop scripts that need the 8192 NSIS_MAX_STRLEN special build from compiling.<hr />Save it into your NSIS Include folder, as e.g. SetReqStrLen.nsh...

== The Snippet ==
<highlight-nsis>
!macro SetReqStrLen Req_STRLEN
!define "Check_${NSIS_MAX_STRLEN}"
!ifndef "Check_${Req_STRLEN}"
 !error "You're not using the ${Req_STRLEN} string length special build! \
 ${NSIS_MAX_STRLEN} is no good!"
!else
 !undef "Check_${NSIS_MAX_STRLEN}"
 !undef "SetReqStrLen"
!endif
!macroend
!define SetReqStrLen "!insertmacro SetReqStrLen"
</highlight-nsis>

Then, in your own scripts use...

<highlight-nsis>
!include SetReqStrLen.nsh
${SetReqStrLen} 8192
</highlight-nsis>

If you want your script to compile only on the normal build, change 8192 to 1024.

I made it for [[user:kike_velez|kike_velez]] in [http://forums.winamp.com/showthread.php?postid=1591448 this topic].

-Stu

[[Category:Compile-Time Macros]]