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;-TOP by mk-soft, v1.01.2, 23.04.2023

; Only TCP/IP
; Len = CheckReceiveLength(ConnectionID(Client))

CompilerSelect #PB_Compiler_OS
  CompilerCase #PB_OS_Linux
    #FIONREAD = $0000541B
  CompilerCase #PB_OS_MacOS
    #FIONREAD = $4004667F
CompilerEndSelect

Procedure CheckReceiveLength(Socket)
  Protected length, result
  
  CompilerSelect #PB_Compiler_OS
    CompilerCase #PB_OS_Windows
      result = ioctlsocket_(Socket, #FIONREAD, @length)
      
    CompilerCase #PB_OS_Linux
      result = ioctl_(Socket, #FIONREAD, @length)
      
    CompilerCase #PB_OS_MacOS
      result = ioctl_(Socket, #FIONREAD, @length)
      
  CompilerEndSelect
  
  If result <> 0
    ProcedureReturn -1; socket error
  EndIf
  
  ProcedureReturn length
EndProcedure