This appendix describes the structure of the MDENC field in the message descriptor (see MQMD - Message descriptor).
The MDENC field is a 32-bit integer that is divided into four separate subfields; these subfields identify:
Each subfield is identified by a bit mask which has 1-bits in the positions corresponding to the subfield, and 0-bits elsewhere. The bits are numbered such that bit 0 is the most significant bit, and bit 31 the least significant bit. The following masks are defined:
This subfield occupies bit positions 28 through 31 within the MDENC field.
This subfield occupies bit positions 24 through 27 within the MDENC field.
This subfield occupies bit positions 20 through 23 within the MDENC field.
This subfield occupies bit positions 0 through 19 within the MDENC field.
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