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'   **********************************************************************
'   **                                                                  **
'   **  Resource stream for Rapid-Q (c) 2000 Pavel "Crusher" Minayev    **
'   **  Version 1.10 (built on 6/25/2000)                               **
'   **  If you find a bug, e-mail me to minayev@aport.ru                **
'   **                                                                  **
'   **  You can freely distribute & modify this file if you mention     **
'   **  somewhere that original file was written by me.                 **
'   **                                                                  **
'   **  To use this file, $INCLUDE it in your programs, and you will    **
'   **  be able to declare variables of QResourceStream type. They'll   **
'   **  work exactly like file streams opened in fmOpenRead mode, but   **
'   **  you should open resources by <variable>.Open(<resource-number>) **
'   **  Note that you don't have to use RESOURCE() function, it's done  **
'   **  automatically. Access mode is always read-only, calls to Write  **
'   **  functions doesn't do anything. Also, ReadUDT will not work at   **
'   **  all for now. And you should NEVER use resource streams as       **
'   **  arguments of CopyFrom method - that'll give you an error.       **
'   **                                                                  **
'   **  I don't know if this library will work on future versions of    **
'   **  Rapid-Q. It may work, or may not. However, I'll try to release  **
'   **  new versions of this library for the new versions of Rapid-Q.   **
'   **                                                                  **
'   **  This library was made for Win32. I doubt it works under Unix or **
'   **  Linux, and I don't have one to test it. You can however port it **
'   **  it to any OS you like if you want to do so.                     **
'   **                                                                  **
'   **  Program history:                                                **
'   **                                                                  **
'   **  Version 1.10                                                    **
'   **  - got rid of ResourceStart definition                           **
'   **  - implemented EOF property                                      **
'   **                                                                  **
'   **  Version 1.00                                                    **
'   **  - initial release                                               **
'   **                                                                  **
'   **********************************************************************

     $TYPECHECK ON
     $INCLUDE "rapidq.inc"

     TYPE QResourceStream EXTENDS QFILESTREAM
PRIVATE:
      DataTypeToSize(Num_BYTE TO Num_DOUBLE) AS INTEGER
      Offset AS INTEGER
      ResourceStart AS INTEGER
      RealFile AS QFILESTREAM

PUBLIC:
      LineCount AS INTEGER
      Position AS INTEGER
      Size AS INTEGER

      CONSTRUCTOR
       Offset = 0
       LineCount = 0
       DataTypeToSize(Num_BYTE) = SIZEOF(BYTE)
       DataTypeToSize(Num_SHORT) = SIZEOF(SHORT)
       DataTypeToSize(Num_WORD) = SIZEOF(WORD)
       DataTypeToSize(Num_LONG) = SIZEOF(LONG)
       DataTypeToSize(Num_DWORD) = SIZEOF(DWORD)
       DataTypeToSize(Num_SINGLE) = SIZEOF(SINGLE)
       DataTypeToSize(Num_DOUBLE) = SIZEOF(DOUBLE)
       RealFile.OPEN(COMMAND$(0), fmOpenRead)
       RealFile.Seek(-4, soFromEnd)
       ResourceStart = QResourceStream.RealFile.Size - QResourceStream.RealFile.ReadNum(Num_LONG) - 4
      END CONSTRUCTOR

      FUNCTION OPEN(Res AS INTEGER) AS INTEGER
       WITH QResourceStream
        IF Res >= RESOURCECOUNT THEN
         Result = False
        ELSE
         .Offset = .ResourceStart + RESOURCE(Res)
         .RealFile.Seek(.Offset, soFromBeginning)
         .Size = .RealFile.ReadNum(Num_LONG)
         .Offset + = SIZEOF(LONG)
         .Position = 0
         Result = True
        END IF
       END WITH
      END SUB

      SUB CLOSE
       QResourceStream.Offset = 0
      END SUB

      SUB Seek(NewPos AS INTEGER, From AS INTEGER)
       WITH QResourceStream
        SELECT CASE From
        CASE IS = soFromBeginning
         .Position = NewPos
        CASE IS = soFromCurrent
         .Position + = NewPos
        CASE IS = soFromEnd
         .Position = .Size - NewPos - 1
        END SELECT
        IF .Position < 0 THEN .Position = 0
        IF .Position >= .Size THEN .Position = .Size - 1
        .RealFile.Seek(.Offset + .Position, soFromBeginning)
       END WITH
      END SUB

      FUNCTION EOF AS INTEGER
       IF QResourceStream.Position = QResourceStream.Size THEN
        Result = True
       ELSE
        Result = False
       END IF
      END FUNCTION

PRIVATE:

      SUB CheckForEOF
       WITH QResourceStream
        IF .Position > .Size THEN
         .Position = .Size
'                    .Seek(0, soFromEnd)
        END IF
       END WITH
      END SUB

PUBLIC:

      FUNCTION ReadNum(Size AS INTEGER) AS DOUBLE
       WITH QResourceStream
        IF .Position = .Size THEN EXIT FUNCTION     ' EOF
        Result = .RealFile.ReadNum(Size)
        .Position + = .DataTypeToSize(Size)
        .CheckForEOF
       END WITH
      END FUNCTION

      FUNCTION ReadStr(Size AS INTEGER) AS STRING
       DEFSTR Tmp
       WITH QResourceStream
        IF .Position = .Size THEN EXIT FUNCTION     ' EOF
        Tmp = .RealFile.ReadStr(Size)
        IF .Position >= .Size THEN
         Tmp = LEFT$(Tmp, LEN(Tmp) - (.Position - .Size + 1))
         .Position = .Size - 1
         .Seek(0, soFromEnd)
        END IF
        Result = Tmp
       END WITH
      END FUNCTION

      FUNCTION ReadBinStr(Size AS INTEGER) AS STRING
       Result = QResourceStream.ReadStr(Size)
      END FUNCTION

      FUNCTION ReadLine AS STRING
       DEFINT char
       DEFSTR Res
       WITH QResourceStream
        IF .Position = .Size THEN EXIT FUNCTION     ' EOF
        char = 0 : Res = ""
        WHILE char <> 13 AND .Size <> .Position
         char = .ReadNum(Num_BYTE)
         IF char <> 13 AND char <> 10 THEN
          Res = Res + CHR$(char)
         END IF
        WEND
        Result = Res
       END WITH
      END FUNCTION

      SUB ReadUDT(DATA AS QOBJECT)
            ' Not yet implemented
      END SUB

      SUB WriteNum(Number AS INTEGER, Size AS INTEGER)
            ' Does nothing
      END SUB

      SUB WriteStr(DATA AS STRING, Size AS INTEGER)
            ' Does nothing
      END SUB

      SUB WriteBinStr(DATA AS STRING, Size AS INTEGER)
            ' Does nothing
      END SUB

      SUB WriteLine(Line AS STRING)
            ' Does nothing
      END SUB

      SUB WriteUDT(DATA AS QOBJECT)
            ' Does nothing
      END SUB

      SUB CopyFrom(Stream AS QOBJECT, Bytes AS INTEGER)
            ' Does nothing
      END SUB

     END TYPE
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Email:webmaster1g.yi.org Hits:0 Last modified:2013-06-19 07:45:49