[Boost-commit] svn:boost r72065 - sandbox/endian/boost/integer

Subject: [Boost-commit] svn:boost r72065 - sandbox/endian/boost/integer
From: bdawes_at_[hidden]
Date: 2011-05-21 17:09:29

Author: bemandawes
Date: 2011-05-21 17:09:29 EDT (Sat, 21 May 2011)
New Revision: 72065
URL: http://svn.boost.org/trac/boost/changeset/72065

Log:
Initial commit
Added:
   sandbox/endian/boost/integer/conversion.hpp   (contents, props changed)

Added: sandbox/endian/boost/integer/conversion.hpp
==============================================================================
--- (empty file)
+++ sandbox/endian/boost/integer/conversion.hpp	2011-05-21 17:09:29 EDT (Sat, 21 May 2011)
@@ -0,0 +1,202 @@
+//  boost/endian/conversion.hpp  -------------------------------------------------------//
+
+//  Copyright Beman Dawes 2010, 2011
+
+//  Distributed under the Boost Software License, Version 1.0.
+//  http://www.boost.org/LICENSE_1_0.txt
+
+#ifndef BOOST_ENDIAN_CONVERSION_HPP
+#define BOOST_ENDIAN_CONVERSION_HPP
+
+#include <boost/detail/endian.hpp>
+#include <boost/cstdint.hpp>
+
+//------------------------------------- synopsis ---------------------------------------//
+
+namespace boost
+{
+namespace endian
+{
+  // unconditional modifying (i.e. in-place) endianness reversal
+
+  inline void flip(int16_t& x);
+  inline void flip(int32_t& x);
+  inline void flip(int64_t& x);
+  inline void flip(uint16_t& x);
+  inline void flip(uint32_t& x);
+  inline void flip(uint64_t& x);
+
+  // unconditional non-modifying endianness reversing copy
+
+  inline void flip(int16_t source, int16_t& target);
+  inline void flip(int32_t source, int32_t& target);
+  inline void flip(int64_t source, int64_t& target);
+  inline void flip(uint16_t source, uint16_t& target);
+  inline void flip(uint32_t source, uint32_t& target);
+  inline void flip(uint64_t source, uint64_t& target);
+
+  // conditional modifying (i.e. in-place) endianness reversal;
+  //  no effect if native endianness and specified endianness are the same
+
+  template <class T> inline void to_big(T& x);       // if different, convert native to big
+  template <class T> inline void to_little(T& x);    // if different, convert native to little
+  template <class T> inline void from_big(T& x);     // if different, convert big to native
+  template <class T> inline void from_little(T& x);  // if different, convert little to native
+
+  // non-modifying copy, conditionally reversing endianness;
+  //   copy the first argument to the second argument, converting to or from the
+  //   specified endianness if different than native endianness
+
+  template <class T> inline void to_big(T native, T& big);
+  template <class T> inline void to_little(T native, T& little);
+  template <class T> inline void from_big(T big, T& native);
+  template <class T> inline void from_little(T little, T& native);
+
+//----------------------------------- implementation -----------------------------------//
+                                                
+  inline void flip(int16_t& x)
+  {
+    char* rep = reinterpret_cast<char*>(&x);
+    char tmp;
+    tmp = *rep;
+    *rep = *(rep+1);
+    *(rep+1) = tmp;
+  }
+
+  inline void flip(int32_t& x)
+  {
+    char* rep = reinterpret_cast<char*>(&x);
+    char tmp;
+    tmp = *rep;
+    *rep = *(rep+3);
+    *(rep+3) = tmp;
+    tmp = *(rep+1);
+    *(rep+1) = *(rep+2);
+    *(rep+2) = tmp;
+  }
+
+  inline void flip(int64_t& x)
+  {
+    char* rep = reinterpret_cast<char*>(&x);
+    char tmp;
+    tmp = *rep;
+    *rep = *(rep+7);
+    *(rep+7) = tmp;
+    tmp = *(rep+1);
+    *(rep+1) = *(rep+6);
+    *(rep+6) = tmp;
+    tmp = *(rep+2);
+    *(rep+2) = *(rep+5);
+    *(rep+5) = tmp;
+    tmp = *(rep+3);
+    *(rep+3) = *(rep+4);
+    *(rep+4) = tmp;
+  }
+
+  inline void flip(uint16_t& x)
+  {
+    char* rep = reinterpret_cast<char*>(&x);
+    char tmp;
+    tmp = *rep;
+    *rep = *(rep+1);
+    *(rep+1) = tmp;
+  }
+
+  inline void flip(uint32_t& x)
+  {
+    char* rep = reinterpret_cast<char*>(&x);
+    char tmp;
+    tmp = *rep;
+    *rep = *(rep+3);
+    *(rep+3) = tmp;
+    tmp = *(rep+1);
+    *(rep+1) = *(rep+2);
+    *(rep+2) = tmp;
+  }
+
+  inline void flip(uint64_t& x)
+  {
+    char* rep = reinterpret_cast<char*>(&x);
+    char tmp;
+    tmp = *rep;
+    *rep = *(rep+7);
+    *(rep+7) = tmp;
+    tmp = *(rep+1);
+    *(rep+1) = *(rep+6);
+    *(rep+6) = tmp;
+    tmp = *(rep+2);
+    *(rep+2) = *(rep+5);
+    *(rep+5) = tmp;
+    tmp = *(rep+3);
+    *(rep+3) = *(rep+4);
+    *(rep+4) = tmp;
+  }
+
+  inline void flip(int16_t source, int16_t& target)
+  {
+    const char* s (reinterpret_cast<const char*>(&source));
+    char * t (reinterpret_cast<char*>(&target) + sizeof(target) - 1);
+    *t = *s;
+    *++t = *++s;
+  }
+
+  inline void flip(int32_t source, int32_t& target)
+  {
+    const char* s (reinterpret_cast<const char*>(&source));
+    char * t (reinterpret_cast<char*>(&target) + sizeof(target) - 1);
+    *t = *s;
+    *++t = *++s;
+    *++t = *++s;
+    *++t = *++s;
+  }
+
+  inline void flip(int64_t source, int64_t& target)
+  {
+    const char* s (reinterpret_cast<const char*>(&source));
+    char * t (reinterpret_cast<char*>(&target) + sizeof(target) - 1);
+    *t = *s;
+    *++t = *++s;
+    *++t = *++s;
+    *++t = *++s;
+    *++t = *++s;
+    *++t = *++s;
+    *++t = *++s;
+    *++t = *++s;
+  }
+
+  inline void flip(uint16_t source, uint16_t& target)
+  {
+    const char* s (reinterpret_cast<const char*>(&source));
+    char * t (reinterpret_cast<char*>(&target) + sizeof(target) - 1);
+    *t = *s;
+    *++t = *++s;
+  }
+
+  inline void flip(uint32_t source, uint32_t& target)
+  {
+    const char* s (reinterpret_cast<const char*>(&source));
+    char * t (reinterpret_cast<char*>(&target) + sizeof(target) - 1);
+    *t = *s;
+    *++t = *++s;
+    *++t = *++s;
+    *++t = *++s;
+  }
+
+  inline void flip(uint64_t source, uint64_t& target)
+  {
+    const char* s (reinterpret_cast<const char*>(&source));
+    char * t (reinterpret_cast<char*>(&target) + sizeof(target) - 1);
+    *t = *s;
+    *++t = *++s;
+    *++t = *++s;
+    *++t = *++s;
+    *++t = *++s;
+    *++t = *++s;
+    *++t = *++s;
+    *++t = *++s;
+  }
+
+}  // namespace endian
+}  // namespace boost
+
+#endif // BOOST_ENDIAN_CONVERSION_HPP