;------------------------------------------------------------------------------------------------------------------------------------------
#DefineFunction udfFilePickRandomLine (strFilename)
If strFilename == "" Then Return ""
intBBSize = FileSize (strFilename)
If intBBSize == 0 Then Return ""
hdlBB = BinaryAlloc (intBBSize)
BinaryRead (hdlBB, strFilename)
; Count how many lines.
intLineCnt = BinaryStrCnt (hdlBB, 0, intBBSize - 1, @CRLF) -1
While @TRUE
   ; Pick a random line  (first line is line 0).
   intRandLineNum = Random (intLineCnt)
   ; Go find that line.
   intLineStartsAt = 0
   For intLine = 1 To intRandLineNum
      intLineStartsAt = 2 + BinaryIndex (hdlBB, intLineStartsAt, @CRLF, @FWDSCAN)
   Next
   ; Found beginning of line. Find end.
   iLineEndsAt = BinaryIndex (hdlBB, intLineStartsAt, @CRLF, @FWDSCAN)
   ; Extract Line.
   strLine = BinaryPeekStr (hdlBB, intLineStartsAt, iLineEndsAt - intLineStartsAt)
   If strLine != "" Then Break
EndWhile
hdlBB = BinaryFree (hdlBB)
Return strLine
;..........................................................................................................................................
; This UDF "udfFilePickRandomLine" returns a single line,
; randomly extracted out of textfile.
; This can be used for building a "quote of the day" application.
;
; Conf:  WinBatch
; From:  Marty marty@winbatch.com
; Date:  Sunday,  December 02,  2001 09:49 PM
; Slightly modified by Detlev Dalitz.20020204
;..........................................................................................................................................
#EndFunction
;------------------------------------------------------------------------------------------------------------------------------------------


;------------------------------------------------------------------------------------------------------------------------------------------
#DefineFunction udfFilePickRandomLineV2 (strFilename)
If strFilename == "" Then Return ""
strItemList = FileGet (strFilename)
If strItemList == "" Then Return ""
intLineCnt = ItemCount (strItemList, @LF) - (StrSub (strItemList, FileSize (strFilename), 1) == @LF)
While @TRUE
   strLine = ItemExtract (1, ItemExtract (1 + Random (intLineCnt), strItemList, @LF), @CR)
   If strLine != "" Then Break
EndWhile
Return strLine
;..........................................................................................................................................
; This UDF "udfFilePickRandomLine" returns a single line,
; randomly extracted out of textfile.
; This can be used for building a "quote of the day" application.
;..........................................................................................................................................
; Detlev Dalitz.20030709
;..........................................................................................................................................
#EndFunction
;------------------------------------------------------------------------------------------------------------------------------------------


; Test.

strFilename = IntControl (1004, 0, 0, 0, 0) ; We use this file as test input.

strMsgTitle = "Demo: udfFilePickRandomLine (strFilename)"
strMsgText  =  udfFilePickRandomLine (strFilename)
Message (strMsgTitle, strMsgText)

strMsgTitle = "Demo: udfFilePickRandomLineV2 (strFilename)"
strMsgText  =  udfFilePickRandomLineV2 (strFilename)
Message (strMsgTitle, strMsgText)

Exit
;------------------------------------------------------------------------------------------------------------------------------------------