diff options
Diffstat (limited to 'ace/CDR_Stream.h')
| -rw-r--r-- | ace/CDR_Stream.h | 62 |
1 files changed, 38 insertions, 24 deletions
diff --git a/ace/CDR_Stream.h b/ace/CDR_Stream.h index 13dad9d7ab5..95efb66f46a 100644 --- a/ace/CDR_Stream.h +++ b/ace/CDR_Stream.h @@ -4,32 +4,46 @@ // ============================================================================ // // = LIBRARY -// ace +// ace // // = FILENAME -// CDR_Stream.h +// CDR.h // // = DESCRIPTION -// ACE Common Data Representation (CDR) marshaling and demarshaling -// classes. +// Common Data Representation (CDR) marshaling streams. // -// This implementation was inspired in the CDR class in SunSoft's -// IIOP engine, but has a completely different implementation and a -// different interface too. +// This implementation assumes that the native numeric +// representation is two's complement for integers, IEEE +// single/double for floats. Also that characters are in ISO +// Latin/1. // -// The current implementation assumes that the host has 1-byte, -// 2-byte and 4-byte integral types, and that it has single -// precision and double precision IEEE floats. -// Those assumptions are pretty good these days, with Crays beign -// the only known exception. +// Note that CDR itself makes no such assumptions, but this +// implementation makes such assumptions for reasons of +// efficiency. Careful enhancements could preserve that +// efficiency where the assumptions are true, yet still allow the +// code to work when they aren't true. +// +// The implementation expects that buffers are aligned according +// to the strongest CDR alignment restriction. +// +// NOTE: this does everything "CDR 1.1" does ... that is, it +// supports the five extended OMG-IDL data types in UNO Appendix +// A, which provide richer arithmetic types (64 bit integers, +// "quad precision" FP) and UNICODE-based characters and strings. +// Those types are not standard parts of OMG-IDL at this time. +// +// THREADING NOTE: CDR data structures must be protected against +// concurrent access by their owning thread. // // = AUTHORS -// Aniruddha Gokhale <gokhale@cs.wustl.edu> and Carlos O'Ryan -// <coryan@cs.wustl.edu> for the original implementation in TAO. -// ACE version by Jeff Parsons <parsons@cs.wustl.edu> -// and Istvan Buki <istvan.buki@euronet.be>. -// Codeset translation by Jim Rogers (jrogers@viasoft.com) and -// Carlos O'Ryan <coryan@cs.wustl.edu> +// Original copyright 1994-1995 by Sun Microsystems, Inc. See +// $TAO_ROOT/COPYING.sun for more info. +// Many enhancements added by Aniruddha Gokhale +// <gokhale@cs.wustl.edu> and Carlos O'Ryan <coryan@cs.wustl.edu> +// for TAO. ACE version by Jeff Parsons <parsons@cs.wustl.edu> +// and Istvan Buki <istvan.buki@euronet.be>. +// Codeset translation by Jim Rogers (jrogers@viasoft.com) and +// Carlos O'Ryan <coryan@cs.wustl.edu> // // ============================================================================ @@ -143,7 +157,7 @@ public: # if (defined (_MSC_VER) && (_MSC_VER >= 900)) \ || (defined (__BORLANDC__) && (__BORLANDC__ >= 0x530)) typedef __int64 LongLong; - # elif ACE_SIZEOF_LONG == 8 && !defined(_CRAYMPP) + # elif ACE_SIZEOF_LONG == 8 typedef long LongLong; # elif ACE_SIZEOF_LONG_LONG == 8 && !defined (ACE_LACKS_LONGLONG_T) # if defined (sun) && !defined (ACE_LACKS_U_LONGLONG_T) && !defined (__KCC) @@ -179,11 +193,11 @@ public: # else /* ACE_SIZEOF_INT != 4 */ // Applications will probably have trouble with this. char f[4]; - # if defined(_UNICOS) && !defined(_CRAYMPP) - Float (void); - Float (const float &init); - Float & operator= (const float &rhs); - int operator!= (const Float &rhs) const; + # if defined(_UNICOS) + Float (void); + Float (const float &init); + float operator= (const Float &rhs) const; + int operator!= (const Float &rhs) const; # endif /* _UNICOS */ # endif /* ACE_SIZEOF_INT != 4 */ }; |