NSIS 获取参数 | GetOptions

本文介绍了NSIS 获取参数的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

为了让 -n 0 值作为字符串(不需要选项)传递给安装程序，我不太明白这个函数的作用是什么?

to get -n 0 value passing as a string (no need option) to the installer, I don't quite understand what this function work?

; GetParameters
 ; input, none
 ; output, top of stack (replaces, with e.g. whatever)
 ; modifies no other variables.

Function GetParameters

  Push $R0
  Push $R1
  Push $R2
  Push $R3

  StrCpy $R2 1
  StrLen $R3 $CMDLINE

  ;Check for quote or space
  StrCpy $R0 $CMDLINE $R2
  StrCmp $R0 '"' 0 +3
    StrCpy $R1 '"'
    Goto loop
  StrCpy $R1 " "

  loop:
    IntOp $R2 $R2 + 1
    StrCpy $R0 $CMDLINE 1 $R2
    StrCmp $R0 $R1 get
    StrCmp $R2 $R3 get
    Goto loop

  get:
    IntOp $R2 $R2 + 1
    StrCpy $R0 $CMDLINE 1 $R2
    StrCmp $R0 " " get
    StrCpy $R0 $CMDLINE "" $R2

  Pop $R3
  Pop $R2
  Pop $R1
  Exch $R0

FunctionEnd

推荐答案

GetParameters 只是获取参数 ("yourapp.exe/foo/bar" will give you "/foo/bar" etc) 它基本上只是去掉第一个令牌(带引号处理)使用 GetOptions 获取参数的值.

GetParameters just gets the parameters ("yourapp.exe /foo /bar" will give you "/foo /bar" etc) It basically just strips away the first token (with quote handling) Use GetOptions to get the value of a parameter.

!include "FileFunc.nsh"
!include "LogicLib.nsh"

function .onInit
${GetParameters} $0
ClearErrors
${GetOptions} $0 "-n" $1
${IfNot} ${Errors}
    MessageBox mb_ok $1
${EndIf}
functionend

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