diff options
Diffstat (limited to 'elfcpp/elfcpp_swap.h')
| -rw-r--r-- | elfcpp/elfcpp_swap.h | 67 |
1 files changed, 66 insertions, 1 deletions
diff --git a/elfcpp/elfcpp_swap.h b/elfcpp/elfcpp_swap.h index 0685276158..833da5da5f 100644 --- a/elfcpp/elfcpp_swap.h +++ b/elfcpp/elfcpp_swap.h @@ -1,6 +1,6 @@ // elfcpp_swap.h -- Handle swapping for elfcpp -*- C++ -*- -// Copyright 2006, 2007, 2008, 2009 Free Software Foundation, Inc. +// Copyright 2006, 2007, 2008, 2009, 2012 Free Software Foundation, Inc. // Written by Ian Lance Taylor <iant@google.com>. // This file is part of elfcpp. @@ -430,6 +430,71 @@ struct Swap_unaligned<64, true> } }; +// Swap_aligned32 is a template based on size and on whether the +// target is big endian. It defines the type Valtype and the +// functions readval and writeval. The functions read and write +// values of the appropriate size out of buffers which may not be +// 64-bit aligned, but are 32-bit aligned. + +template<int size, bool big_endian> +struct Swap_aligned32 +{ + typedef typename Valtype_base<size>::Valtype Valtype; + + static inline Valtype + readval(const unsigned char* wv) + { return Swap<size, big_endian>::readval( + reinterpret_cast<const Valtype*>(wv)); } + + static inline void + writeval(unsigned char* wv, Valtype v) + { Swap<size, big_endian>::writeval(reinterpret_cast<Valtype*>(wv), v); } +}; + +template<> +struct Swap_aligned32<64, true> +{ + typedef Valtype_base<64>::Valtype Valtype; + + static inline Valtype + readval(const unsigned char* wv) + { + return ((static_cast<Valtype>(Swap<32, true>::readval(wv)) << 32) + | static_cast<Valtype>(Swap<32, true>::readval(wv + 4))); + } + + static inline void + writeval(unsigned char* wv, Valtype v) + { + typedef Valtype_base<32>::Valtype Valtype32; + + Swap<32, true>::writeval(wv, static_cast<Valtype32>(v >> 32)); + Swap<32, true>::writeval(wv + 4, static_cast<Valtype32>(v)); + } +}; + +template<> +struct Swap_aligned32<64, false> +{ + typedef Valtype_base<64>::Valtype Valtype; + + static inline Valtype + readval(const unsigned char* wv) + { + return ((static_cast<Valtype>(Swap<32, false>::readval(wv + 4)) << 32) + | static_cast<Valtype>(Swap<32, false>::readval(wv))); + } + + static inline void + writeval(unsigned char* wv, Valtype v) + { + typedef Valtype_base<32>::Valtype Valtype32; + + Swap<32, false>::writeval(wv + 4, static_cast<Valtype32>(v >> 32)); + Swap<32, false>::writeval(wv, static_cast<Valtype32>(v)); + } +}; + } // End namespace elfcpp. #endif // !defined(ELFCPP_SWAP_H) |