DDS-XTypes 1.3 RTF Avatar
  1. OMG Issue

DDSXTY13 — Redefinition of the LC=6 and LC=7

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  • Key: DDSXTY13-31
  • Status: closed  
  • Source: Real-Time Innovations ( Dr. Gerardo Pardo-Castellote, Ph.D.)
  • Summary:

    Currently LC=6 indicates the length is multiplied by 2 and LC=7 indicates it should be multiplied by 4.

    It would be better if LC=6 indicated the length is multiplied by 4 and LC=7 indicated it should be multiplied by 8.

    The reason is that members of length 8 (INT64) and DOUBLE are far more common that members of length 2 (INT16 and CHAR16).
  • Reported: DDS-XTypes 1.2 — Thu, 6 Sep 2018 02:21 GMT
  • Disposition: Resolved — DDS-XTypes 1.3
  • Disposition Summary:

    Change the interpretation of LC=6 and LC=7

    Change de interpretation of the Length Code (LC) for values LC=6 and LC=7. The new interpretation shall be:

    • LC = 6 = 0b110 indicates serialized member length is 4*NEXTINT
    • LC = 7 = 0b111 indicates serialized member length is 8*NEXTINT

    This impacts only de LC definitions that appear in section 7.4.3.4.2 'Member Header (EMHEADER), Length Code (LC) and NEXTINT'
  • Updated: Tue, 8 Oct 2019 17:55 GMT