added WinVer.nsh - LogicLib extensions for handling Windows versions

git-svn-id: https://svn.code.sf.net/p/nsis/code/NSIS/trunk@4764 212acab6-be3b-0410-9dea-997c60f758d6

Include/SConscript

@@ -9,6 +9,7 @@ includes = Split("""
 	TextFunc.nsh
 	UpgradeDLL.nsh
 	WinMessages.nsh
+	WinVer.nsh
 	WordFunc.nsh
 	x64.nsh
 """)

Include/WinVer.nsh

@@ -0,0 +1,146 @@
+; ---------------------
+;      WinVer.nsh
+; ---------------------
+;
+; LogicLib extensions for handling Windows versions.
+;
+; IsNT checks if the installer is running on Windows NT family (NT4, 2000, XP, etc.)
+;
+;   ${If} ${IsNT}
+;     DetailPrint "Running on NT. Installing Unicode enabled application."
+;   ${Else}
+;     DetailPrint "Not running on NT. Installing ANSI application."
+;   ${EndIf}
+;
+; AtLeastWin<version> checks if the installer is running on Windows version at least as specified.
+; IsWin<version> checks if the installer is running on Windows version exactly as specified.
+; AtMostWin<version> checks if the installer is running on Windows version at most as specified.
+;
+; <version> can be replaced with the following values:
+;
+;   95
+;   98
+;   ME
+;
+;   NT4
+;   2000
+;   XP
+;   2003
+;   Vista
+;
+; Usage examples:
+;
+;   ${If} ${IsNT}
+;   DetailPrint "Running on NT family."
+;   DetailPrint "Surely not running on 95, 98 or ME."
+;   ${AndIf} ${AtLeastWinNT4}
+;     DetailPrint "Running on NT4 or better. Could even be 2003."
+;   ${EndIf}
+;
+;   ${If} ${AtLeastWinXP}
+;     DetailPrint "Running on XP or better."
+;   ${EndIf}
+;
+;   ${If} ${IsWin2000}
+;     DetailPrint "Running on 2000."
+;   ${EndIf}
+;
+;   ${If} ${AtMostWinXP}
+;     DetailPrint "Running on XP or older. Surely not running on Vista. Maybe 98, or even 95."
+;   ${EndIf}
+;
+; Warning:
+;
+;   Windows 95 and NT both use the same version number. To avoid getting NT4 misidentified
+;   as Windows 95 and vice-versa or 98 as a version higher than NT4, always use IsNT to
+;   check if running on the NT family.
+;
+;     ${If} ${AtLeastWin95}
+;     ${And} ${AtMostWinME}
+;       DetailPrint "Running 95, 98 or ME."
+;       DetailPrint "Actually, maybe it's NT4?"
+;       ${If} ${IsNT}
+;         DetailPrint "Yes, it's NT4! oops..."
+;       ${Else}
+;         DetailPrint "Nope, not NT4. phew..."
+;       ${EndIf}
+;     ${EndIf}
+
+!ifndef ___WINVER__NSH___
+!define ___WINVER__NSH___
+
+!include LogicLib.nsh
+
+!define WINVER_95 0x400
+!define WINVER_98 0x410
+!define WINVER_ME 0x490
+
+!define WINVER_NT4 0x400
+!define WINVER_2000 0x500
+!define WINVER_XP 0x501
+!define WINVER_2003 0x502
+!define WINVER_VISTA 0x600
+
+!macro __GetWinVer
+  !insertmacro _LOGICLIB_TEMP
+  System::Call kernel32::GetVersion()i.s
+  Pop $_LOGICLIB_TEMP
+!macroend
+
+!macro __ParseWinVer
+  !insertmacro __GetWinVer
+  Push $0
+  IntOp $0 $_LOGICLIB_TEMP & 0xff
+  IntOp $0 $0 << 8
+  IntOp $_LOGICLIB_TEMP $_LOGICLIB_TEMP & 0xff00
+  IntOp $_LOGICLIB_TEMP $_LOGICLIB_TEMP >> 8
+  IntOp $_LOGICLIB_TEMP $_LOGICLIB_TEMP | $0
+  Pop $0
+!macroend
+
+!macro _IsNT _a _b _t _f
+  !insertmacro __GetWinVer
+  IntOp $_LOGICLIB_TEMP $_LOGICLIB_TEMP & 0x80000000
+  !insertmacro _== $_LOGICLIB_TEMP 0 `${_t}` `${_f}`
+!macroend
+!define IsNT `"" IsNT ""`
+
+!macro __WinVer_DefineOSTest Test OS
+
+  !define ${Test}Win${OS} `"" WinVer${Test} ${WINVER_${OS}}`
+
+!macroend
+
+!macro __WinVer_DefineOSTests Test
+
+  !insertmacro __WinVer_DefineOSTest ${Test} 95
+  !insertmacro __WinVer_DefineOSTest ${Test} 98
+  !insertmacro __WinVer_DefineOSTest ${Test} ME
+  !insertmacro __WinVer_DefineOSTest ${Test} NT4
+  !insertmacro __WinVer_DefineOSTest ${Test} 2000
+  !insertmacro __WinVer_DefineOSTest ${Test} XP
+  !insertmacro __WinVer_DefineOSTest ${Test} 2003
+  !insertmacro __WinVer_DefineOSTest ${Test} VISTA
+
+!macroend
+
+!macro _WinVerAtLeast _a _b _t _f
+  !insertmacro __ParseWinVer
+  !insertmacro _>= $_LOGICLIB_TEMP `${_b}` `${_t}` `${_f}`
+!macroend
+
+!macro _WinVerIs _a _b _t _f
+  !insertmacro __ParseWinVer
+  !insertmacro _= $_LOGICLIB_TEMP `${_b}` `${_t}` `${_f}`
+!macroend
+
+!macro _WinVerAtMost _a _b _t _f
+  !insertmacro __ParseWinVer
+  !insertmacro _<= $_LOGICLIB_TEMP `${_b}` `${_t}` `${_f}`
+!macroend
+
+!insertmacro __WinVer_DefineOSTests AtLeast
+!insertmacro __WinVer_DefineOSTests Is
+!insertmacro __WinVer_DefineOSTests AtMost
+
+!endif # !___WINVER__NSH___