This topic describes the fields in the parameter area for the bidi service:

CUNBBPRM_Version - set by caller - Required

Specifies the version of the parameter area for bidi.

CUNBBPRM_Length - set by caller - Required

Specifies the length of the parameter area.

CUNBBPRM_Src_Buf_Ptr - set by caller, updated by service - Required

Specifies the beginning address of a string of text characters, with a length specified in the CUNBBPRM_Src_Buf_Len parameter.

CUNBBPRM_Src_Buf_ALET - set by caller

Specifies the ALET to be used to access the source buffer addressed by CUNBBPRM_Src_Buf_Ptr.

CUNBBPRM_Src_Buf_Len - set by caller

Specifies the length in bytes of the string in the source buffer, addressed by CUNBBPRM_Src_Buf_Ptr, to be transformed.

CUNBBPRM_Targ_Buf_Ptr - set by caller

Specifies the beginning address of an area of storage to be used to store the final string layout.

CUNBBPRM_Targ_Buf_ALET - set by caller

Specifies the ALET to be used to access the target buffer addressed by CUNBBPRM_Targ_Buf_Ptr.

CUNBBPRM_Targ_Buf_Len - set by caller

Specifies the length in bytes of the target buffer addressed by CUNBBPRM_Targ_Buf_Ptr. It should be at least the same size of the CUNBBPRM_Src_Buf_Len.

CUNBBPRM_Wrk_Buf_Ptr - set by caller, used by service for conversion purposes.

Specifies the beginning address of an area of storage that the conversion services can use to store intermediate results.

CUNBBPRM_Wrk_Buf_ALET - set by caller

Specifies the ALET to be used to access the work buffer addressed by CUNBBPRM_Wrk_Buf_Ptr.

CUNBBPRM_Wrk_Buf_Len - set by caller

Specifies the length in bytes of the work buffer addressed by CUNBBPRM_Wrk_Buf_Ptr. It should be at least the same size of the CUNBBPRM_Src_Buf_Len.

CUNBBPRM_CCSID_Src - set by caller

Specifies the CCSID of the source.

CUNBBPRM_CCSID_Trg - set by caller

Specifies the CCSID of the target.

CUNBBPRM_Flag1 - set by caller

Bit position	Name
1xxx xxxx	CUNBBPRM_Bidi_context
x1xx xxxx	CUNBBPRM_Bidi_impalg

CUNBBPRM_Bidi_context

Specifies the context of the text to be transformed.

• 0: Indicates the context is Left to Right (LTR).
• 1: Indicates the context is Right to Left (RTL).

CUNBBPRM_Bidi_impalg

Specifies the algorithm to be used.

• 0: Indicates the basic algorithm will be used.
• 1: Indicates the implicit algorithm will be used.

CUNBBPRM_Return_Code - set by service

Specifies the return code.

CUNBBPRM_Reason_Code - set by service

Specifies the reason code.