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-// -*- C++ -*-
-
-//=============================================================================
-/**
- * @file CDR_Base.h
- *
- * $Id$
- *
- * ACE Common Data Representation (CDR) basic types.
- *
- * 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 being
- * the only known exception.
- *
- *
- * @author TAO version by
- * @author Aniruddha Gokhale <gokhale@cs.wustl.edu>
- * @author Carlos O'Ryan<coryan@cs.wustl.edu>
- * @author ACE version by
- * @author Jeff Parsons <parsons@cs.wustl.edu>
- * @author Istvan Buki <istvan.buki@euronet.be>
- */
-//=============================================================================
-
-
-#ifndef ACE_CDR_BASE_H
-#define ACE_CDR_BASE_H
-
-#include "ace/pre.h"
-
-#include "ace/config-all.h"
-
-#if !defined (ACE_LACKS_PRAGMA_ONCE)
-# pragma once
-#endif /* ACE_LACKS_PRAGMA_ONCE */
-
-#include "ace/Basic_Types.h"
-#include "ace/Message_Block.h"
-
-/**
- * @class ACE_CDR
- *
- * @brief Keep constants and some routines common to both Output and
- * Input CDR streams.
- */
-class ACE_Export ACE_CDR
-{
-public:
- // = Constants defined by the CDR protocol.
- // By defining as many of these constants as possible as enums we
- // ensure they get inlined and avoid pointless static memory
- // allocations.
-
- enum
- {
- // Note that some of these get reused as part of the standard
- // binary format: unsigned is the same size as its signed cousin,
- // float is LONG_SIZE, and double is LONGLONG_SIZE.
-
- OCTET_SIZE = 1,
- SHORT_SIZE = 2,
- LONG_SIZE = 4,
- LONGLONG_SIZE = 8,
- LONGDOUBLE_SIZE = 16,
-
- OCTET_ALIGN = 1,
- SHORT_ALIGN = 2,
- LONG_ALIGN = 4,
- LONGLONG_ALIGN = 8,
- /// @note the CORBA LongDouble alignment requirements do not
- /// match its size...
- LONGDOUBLE_ALIGN = 8,
-
- /// Maximal CDR 1.1 alignment: "quad precision" FP (i.e. "CDR::Long
- /// double", size as above).
- MAX_ALIGNMENT = 8,
-
- /// The default buffer size.
- /**
- * @todo We want to add options to control this
- * default value, so this constant should be read as the default
- * default value ;-)
- */
- DEFAULT_BUFSIZE = ACE_DEFAULT_CDR_BUFSIZE,
-
- /// The buffer size grows exponentially until it reaches this size;
- /// afterwards it grows linearly using the next constant
- EXP_GROWTH_MAX = ACE_DEFAULT_CDR_EXP_GROWTH_MAX,
-
- /// Once exponential growth is ruled out the buffer size increases
- /// in chunks of this size, note that this constants have the same
- /// value right now, but it does not need to be so.
- LINEAR_GROWTH_CHUNK = ACE_DEFAULT_CDR_LINEAR_GROWTH_CHUNK
- };
-
- /**
- * Do byte swapping for each basic IDL type size. There exist only
- * routines to put byte, halfword (2 bytes), word (4 bytes),
- * doubleword (8 bytes) and quadword (16 byte); because those are
- * the IDL basic type sizes.
- */
- static void swap_2 (const char *orig, char *target);
- static void swap_4 (const char *orig, char *target);
- static void swap_8 (const char *orig, char *target);
- static void swap_16 (const char *orig, char *target);
- static void swap_2_array (const char *orig,
- char *target,
- size_t length);
- static void swap_4_array (const char *orig,
- char *target,
- size_t length);
- static void swap_8_array (const char *orig,
- char *target,
- size_t length);
- static void swap_16_array (const char *orig,
- char *target,
- size_t length);
-
- /// Align the message block to ACE_CDR::MAX_ALIGNMENT,
- /// set by the CORBA spec at 8 bytes.
- static void mb_align (ACE_Message_Block *mb);
-
- /**
- * Compute the size of the smallest buffer that can contain at least
- * <minsize> bytes.
- * To understand how a "best fit" is computed look at the
- * algorithm in the code.
- * Basically the buffers grow exponentially, up to a certain point,
- * then the buffer size grows linearly.
- * The advantage of this algorithm is that is rapidly grows to a
- * large value, but does not explode at the end.
- */
- static size_t first_size (size_t minsize);
-
- /// Compute not the smallest, but the second smallest buffer that
- /// will fir <minsize> bytes.
- static size_t next_size (size_t minsize);
-
- /**
- * Increase the capacity of mb to contain at least <minsize> bytes.
- * If <minsize> is zero the size is increased by an amount at least
- * large enough to contain any of the basic IDL types. Return -1 on
- * failure, 0 on success.
- */
- static int grow (ACE_Message_Block *mb, size_t minsize);
-
- /// Copy a message block chain into a single message block,
- /// preserving the alignment of the original stream.
- static void consolidate (ACE_Message_Block *dst,
- const ACE_Message_Block *src);
-
- static size_t total_length (const ACE_Message_Block *begin,
- const ACE_Message_Block *end);
-
- // Definitions of the IDL basic types, for use in the CDR
- // classes. The cleanest way to avoid complaints from all compilers
- // is to define them all.
- #if defined (CHORUS) && defined (ghs) && !defined (__STANDARD_CXX)
- // This is non-compliant, but a nasty bout with
- // Green Hills C++68000 1.8.8 forces us into it.
- typedef unsigned long Boolean;
- #else /* ! (CHORUS && ghs 1.8.8) */
- typedef u_char Boolean;
- #endif /* ! (CHORUS && ghs 1.8.8) */
-
- typedef u_char Octet;
- typedef char Char;
- typedef ACE_OS::WChar WChar;
- typedef ACE_INT16 Short;
- typedef ACE_UINT16 UShort;
- typedef ACE_INT32 Long;
- typedef ACE_UINT32 ULong;
- typedef ACE_UINT64 ULongLong;
-
- # if (defined (_MSC_VER) && (_MSC_VER >= 900)) \
- || (defined (__BORLANDC__) && (__BORLANDC__ >= 0x530))
- typedef __int64 LongLong;
- # elif ACE_SIZEOF_LONG == 8 && !defined(_CRAYMPP)
- 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)
- // sun #defines u_longlong_t, maybe other platforms do also.
- // Use it, at least with g++, so that its -pedantic doesn't
- // complain about no ANSI C++ long long.
- typedef longlong_t LongLong;
- # else
- // LynxOS 2.5.0 and Linux don't have u_longlong_t.
- typedef long long LongLong;
- # endif /* sun */
- # else /* no native 64 bit integer type */
- # define NONNATIVE_LONGLONG
- # if defined (ACE_BIG_ENDIAN)
- struct ACE_Export LongLong
- {
- ACE_CDR::Long h;
- ACE_CDR::Long l;
- int operator== (const LongLong &rhs) const;
- int operator!= (const LongLong &rhs) const;
- };
- # else
- struct ACE_Export LongLong
- {
- ACE_CDR::Long l;
- ACE_CDR::Long h;
- int operator== (const LongLong &rhs) const;
- int operator!= (const LongLong &rhs) const;
- };
- # endif /* ! ACE_BIG_ENDIAN */
- # endif /* no native 64 bit integer type */
-
- # if defined (NONNATIVE_LONGLONG)
- # define ACE_CDR_LONGLONG_INITIALIZER {0,0}
- # else
- # define ACE_CDR_LONGLONG_INITIALIZER 0
- # endif /* NONNATIVE_LONGLONG */
-
- # if ACE_SIZEOF_FLOAT == 4
- typedef float Float;
- # else /* ACE_SIZEOF_FLOAT != 4 */
- struct Float
- {
- # if ACE_SIZEOF_INT == 4
- // Use u_int to get word alignment.
- u_int f;
- # 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;
- # endif /* _UNICOS */
- # endif /* ACE_SIZEOF_INT != 4 */
- };
- # endif /* ACE_SIZEOF_FLOAT != 4 */
-
- # if ACE_SIZEOF_DOUBLE == 8
- typedef double Double;
- # else /* ACE_SIZEOF_DOUBLE != 8 */
- struct Double
- {
- # if ACE_SIZEOF_LONG == 8
- // Use u_long to get word alignment.
- u_long f;
- # else /* ACE_SIZEOF_INT != 8 */
- // Applications will probably have trouble with this.
- char f[8];
- # endif /* ACE_SIZEOF_INT != 8 */
- };
- # endif /* ACE_SIZEOF_DOUBLE != 8 */
-
- // 94-9-32 Appendix A defines a 128 bit floating point "long
- // double" data type, with greatly extended precision and four
- // more bits of exponent (compared to "double"). This is an IDL
- // extension, not yet standard.
-
- # if ACE_SIZEOF_LONG_DOUBLE == 16
- typedef long double LongDouble;
- #define ACE_CDR_LONG_DOUBLE_INITIALIZER 0
- # else
- # define NONNATIVE_LONGDOUBLE
- # define ACE_CDR_LONG_DOUBLE_INITIALIZER {{0}}
- struct ACE_Export LongDouble
- {
- char ld[16];
- int operator== (const LongDouble &rhs) const;
- int operator!= (const LongDouble &rhs) const;
- // @@ also need other comparison operators.
- };
- # endif /* ACE_SIZEOF_LONG_DOUBLE != 16 */
-
-#if !defined (ACE_CDR_GIOP_MAJOR_VERSION)
-# define ACE_CDR_GIOP_MAJOR_VERSION 1
-#endif /*ACE_CDR_GIOP_MAJOR_VERSION */
-
-#if !defined (ACE_CDR_GIOP_MINOR_VERSION)
-# define ACE_CDR_GIOP_MINOR_VERSION 2
-#endif /* ACE_CDR_GIOP_MINOR_VERSION */
-};
-
-#if defined (__ACE_INLINE__)
-# include "ace/CDR_Base.inl"
-#endif /* __ACE_INLINE__ */
-
-
-#include "ace/post.h"
-
-#endif /* ACE_CDR_BASE_H */
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