NAME

       Trf_QueryMaxRead - Interface for procedures to query a transformation about the max.

SYNOPSIS

       #include <transform.h>

       int Trf_QueryMaxRead
       (
            Trf_ControlBlock ctrlBlock,
            ClientData clientData
       );

PARAMETERS

       Trf_ControlBlock ctrlBlock
              State of encoder/decoder.

       ClientData clientData
              Arbitrary information, as defined in Trf_TypeDefinition.clientData.

DESCRIPTION

        Number  of  bytes  to  read in the next call to the down channel.  This procedure will be
       called by the generic trf layer just before  reading  data  from  the  channel  below  the
       transformation.  This  way  a  transformation  is  able  to  control  its  consumption  of
       characters. An example would be 'identity  with  stop  after  n  characters'.  This  would
       transfer  at  most  n  characters  and  then  basically  fake  higher transformations into
       believing that EOF occured. Then popping it would reveal the truth. Pattern matching could
       be used here too (internet protocols !).

SEE ALSO

       Trf_Init(3),       Trf_SafeInit(3),       Trf_IsInitialized(3),      Trf_CreateOptions(3),
       Trf_DeleteOptions(3),    Trf_CheckOptions(3),    Trf_SetOption(3),    Trf_SetObjOption(3),
       Trf_QueryOptions(3),  Trf_SeekQueryOptions(3),  Trf_WriteProc(3),  Trf_CreateCtrlBlock(3),
       Trf_DeleteCtrlBlock(3),         Trf_TransformCharacter(3),         Trf_TransformBuffer(3),
       Trf_FlushTransformation(3),             Trf_ClearCtrlBlock(3),            Trf_Register(3),
       Trf_ConverterOptions(3),     Trf_MDStart(3),     Trf_MDUpdate(3),      Trf_MDUpdateBuf(3),
       Trf_MDFinal(3),    Trf_MDCheck(3),    Trf_RegisterMessageDigest(3),    Trf_LoadLibrary(3),
       Trf_XorBuffer(3), Trf_ShiftRegister(3), Trf_FlipRegisterShort(3), Trf_FlipRegisterLong(3),
       Trf_InitStubs(3)