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server/dep/acelite/ace/CDR_Base.h
Antz 5260602e28 Applied dep and realm updates
2020-02-17 09:23:51 +00:00

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// -*- C++ -*-
//=============================================================================
/**
* @file CDR_Base.h
*
* $Id: CDR_Base.h 95761 2012-05-15 18:23:04Z johnnyw $
*
* 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/Default_Constants.h"
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
// Stuff used by the ACE CDR classes. Watch these values... they're also used
// in the ACE_CDR Byte_Order enum below.
#if defined ACE_LITTLE_ENDIAN
# define ACE_CDR_BYTE_ORDER 1
// little endian encapsulation byte order has value = 1
#else /* ! ACE_LITTLE_ENDIAN */
# define ACE_CDR_BYTE_ORDER 0
// big endian encapsulation byte order has value = 0
#endif /* ! ACE_LITTLE_ENDIAN */
class ACE_Message_Block;
/**
* @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
};
/**
* @enum Byte_Order
*
* Defines values for the byte_order argument to ACE_OutputCDR and
* ACE_InputCDR.
*/
enum Byte_Order
{
/// Use big-endian order (also known as network byte order).
BYTE_ORDER_BIG_ENDIAN = 0,
/// Use little-endian order.
BYTE_ORDER_LITTLE_ENDIAN = 1,
/// Use whichever byte order is native to this machine.
BYTE_ORDER_NATIVE = ACE_CDR_BYTE_ORDER
};
/**
* 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 (char const *orig, char *target);
static void swap_4 (char const *orig, char *target);
static void swap_8 (char const *orig, char *target);
static void swap_16 (char const *orig, char *target);
static void swap_2_array (char const *orig,
char *target,
size_t length);
static void swap_4_array (char const *orig,
char *target,
size_t length);
static void swap_8_array (char const *orig,
char *target,
size_t length);
static void swap_16_array (char const *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
* @a 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 @a minsize bytes.
static size_t next_size (size_t minsize);
/**
* Increase the capacity of mb to contain at least @a minsize bytes.
* If @a minsize is zero the size is increased by an amount at least
* large enough to contain any of the basic IDL types.
* @retval -1 Failure
* @retval 0 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 first message block of the
* original stream, not the following message blocks.
* @retval -1 Failure
* @retval 0 Success.
*/
static int 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);
/**
* @name Basic OMG IDL Types
*
* These types are for use in the CDR classes. The cleanest way to
* avoid complaints from all compilers is to define them all.
*/
//@{
typedef bool Boolean;
typedef unsigned char Octet;
typedef char Char;
typedef ACE_WCHAR_T 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)) || (defined (__BORLANDC__))
typedef __int64 LongLong;
# elif ACE_SIZEOF_LONG == 8
typedef long LongLong;
# elif defined(__TANDEM)
typedef long long LongLong;
# elif ACE_SIZEOF_LONG_LONG == 8
# if defined (sun) && !defined (ACE_LACKS_U_LONGLONG_T)
// 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
typedef long long LongLong;
# endif /* sun */
# else /* no native 64 bit integer type */
# define NONNATIVE_LONGLONG
struct ACE_Export LongLong
{
# if defined (ACE_BIG_ENDIAN)
ACE_CDR::Long h;
ACE_CDR::Long l;
# else
ACE_CDR::Long l;
ACE_CDR::Long h;
# endif /* ! ACE_BIG_ENDIAN */
/**
* @name Overloaded Relation Operators.
*
* The canonical comparison operators.
*/
//@{
bool operator== (const LongLong &rhs) const;
bool operator!= (const LongLong &rhs) const;
//@}
};
# 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 unsigned int to get word alignment.
unsigned int f;
# else /* ACE_SIZEOF_INT != 4 */
// Applications will probably have trouble with this.
char f[4];
# 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.
unsigned 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
# define ACE_CDR_LONG_DOUBLE_ASSIGNMENT(LHS, RHS) LHS = RHS
# else
# define NONNATIVE_LONGDOUBLE
# define ACE_CDR_LONG_DOUBLE_INITIALIZER {{0}}
# define ACE_CDR_LONG_DOUBLE_ASSIGNMENT(LHS, RHS) LHS.assign (RHS)
struct ACE_Export LongDouble
{
// VxWorks' compiler (gcc 2.96) gets confused by the operator long
// double, so we avoid using long double as the NativeImpl.
// Linux's x86 long double format (12 or 16 bytes) is incompatible
// with Windows, Solaris, AIX, MacOS X and HP-UX (and probably others)
// long double format (8 or 16 bytes). If you need 32-bit Linux to
// inter-operate with 64-bit Linux you will want to define this
// macro to 0 so that "long double" is used. Otherwise, do not define
// this macro.
# if defined (ACE_CDR_IMPLEMENT_WITH_NATIVE_DOUBLE) && \
(ACE_CDR_IMPLEMENT_WITH_NATIVE_DOUBLE == 1)
typedef double NativeImpl;
# else
typedef long double NativeImpl;
# endif /* ACE_CDR_IMPLEMENT_WITH_NATIVE_DOUBLE==1 */
char ld[16];
LongDouble& assign (const NativeImpl& rhs);
LongDouble& assign (const LongDouble& rhs);
bool operator== (const LongDouble &rhs) const;
bool operator!= (const LongDouble &rhs) const;
LongDouble& operator*= (const NativeImpl rhs) {
return this->assign (static_cast<NativeImpl> (*this) * rhs);
}
LongDouble& operator/= (const NativeImpl rhs) {
return this->assign (static_cast<NativeImpl> (*this) / rhs);
}
LongDouble& operator+= (const NativeImpl rhs) {
return this->assign (static_cast<NativeImpl> (*this) + rhs);
}
LongDouble& operator-= (const NativeImpl rhs) {
return this->assign (static_cast<NativeImpl> (*this) - rhs);
}
LongDouble& operator++ () {
return this->assign (static_cast<NativeImpl> (*this) + 1);
}
LongDouble& operator-- () {
return this->assign (static_cast<NativeImpl> (*this) - 1);
}
LongDouble operator++ (int) {
LongDouble ldv = *this;
this->assign (static_cast<NativeImpl> (*this) + 1);
return ldv;
}
LongDouble operator-- (int) {
LongDouble ldv = *this;
this->assign (static_cast<NativeImpl> (*this) - 1);
return ldv;
}
operator NativeImpl () const;
};
# 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 */
};
ACE_END_VERSIONED_NAMESPACE_DECL
#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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