Get vertical space of INI file value: Difference between revisions

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{{PageAuthor|Afrow UK}}
== Description ==
== Description ==


This function was written for [[User:Angus_Leeming|Angus Leeming]]. It finds out how much vertical space (new lines) a INI file value takes up.
This function was written for [[User:Angus_Leeming|Angus Leeming]]. It finds out how much vertical space in lines an INI file value takes up.


== Usage ==
== Usage ==
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teh</highlight-nsis>
teh</highlight-nsis>
'''$R0''' is now ''5''.
'''$R0''' is now ''5'' lines.


== Note ==
== Note ==


File can use TrimNewLines if you <highlight-nsis>!define UseTrimNewLines</highlight-nsis> at the top of the Function.
File can use [[Trim newlines|TrimNewLines]] if you <highlight-nsis>!define UseTrimNewLines</highlight-nsis> at the top of the Function.
Otherwise, it will simply use '''$\r$\n''' as a new line.
Otherwise, it will simply use '''$\r$\n''' as a new line.


Latest revision as of 13:27, 30 June 2005

Author: Afrow UK (talk, contrib)


Description

This function was written for Angus Leeming. It finds out how much vertical space in lines an INI file value takes up.

Usage

 ${GetValueVertSpace} $R0 "path\to\file.ini" "section_name" "key_name"

Example

 ${GetValueVertSpace} $R0 "$INSTDIR\temp.ini" "blah" "meh"

Value of meh is: 

ja
bah
he
 
teh

$R0 is now 5 lines.

Note

File can use TrimNewLines if you 

!define UseTrimNewLines

at the top of the Function.

Otherwise, it will simply use $\r$\n as a new line.

The Function

#!define UseTrimNewLines
Function GetValueVertSpace
Exch $R0 ;key name
Exch
Exch $R1 ;section
Exch 2
Exch $R2 ;ini file
Exch 2
Push $R3
Push $R4
 
 FileOpen $R3 $R2 r
 
 FindSection:
 ClearErrors
 FileRead $R3 $R2
 IfErrors DoneRead
 
 !ifdef UseTrimNewLines
  Push $R2
   Call TrimnewLines
  Pop $R2
  StrCmp $R2 "[$R1]" 0 FindSection
  !undef UseTrimNewLines
 !else
  StrCmp $R2 "[$R1]$\r$\n" 0 FindSection
 !endif
 
  StrLen $R1 $R0
  IntOp $R1 $R1 + 1
 
  FindKey:
  ClearErrors
  FileRead $R3 $R2
  IfErrors DoneRead
 
   StrCpy $R2 $R2 $R1
   StrCmp $R2 "$R0=" 0 FindKey
 
   StrCpy $R0 1
 
   CountLines:
   ClearErrors
   FileRead $R3 $R2
   IfErrors DoneRead
 
    StrCpy $R1 -1
    IntOp $R1 $R1 + 1
    StrCpy $R4 $R2 1 $R1
    StrCmp $R4 "" 0 +3
     IntOp $R0 $R0 + 1
     Goto CountLines
    StrCmp $R4 = 0 -5
 
 DoneRead:
 
 FileClose $R3
 
Pop $R4
Pop $R3
Pop $R2
Pop $R1
Exch $R0
FunctionEnd
!macro GetValueVertSpace Var File Section Key
 Push "${File}"
 Push "${Section}"
 Push "${Key}"
  Call GetValueVertSpace
 Pop "${Var}"
!macroend
!define GetValueVertSpace "!insertmacro GetValueVertSpace"

-Stu

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