如何在NSIS中处理字符串？

Question

I have a string from the parameters that has a installation path using this code:

${GetParameters} $R0
${if} $R0 != ""
    StrCpy $R1 $R0 "" 3
    StrCpy $INSTDIR $R1 -1          
${endif}

the $INSTDIR contains a path like this:

C:\Program Files (x86)\My Applicatoin

I want to get "My Application" out of it and save it in a variable. I know that I should check the characters backwards until i reach the backslash ( \\ ) but I do not know how to implement it in NSIS syntax.

How can I get "My Application" from the folder path using NSIS?

Answer 1

Most string operations can be coded with just StrCpy , StrCmp and StrLen .

A basic version that only checks \\ and not / already exists:

!include FileFunc.nsh
StrCpy $0 "C:\Program Files (x86)\My Application"
${GetFileName} $0 $1
DetailPrint $1