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boost: fix little/big endian compatibility

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When no little/big endian flag is given to the writer, it stores
data in host endianness. When loading, if no flag is set, it also
assumes host endianness. This works as long as the loading and
writing are done on machines with the same endianness.

We change this to default to little endian when saving. This will
cause the loader to see the little endian flag, and swap endianness
when loading on a big endian machine. Similarly, writing on a big
endian machine will swap on save, and a little endian machine will
load little endian data.
This commit is contained in:
moneromooo-monero 2019-05-16 14:56:20 +00:00
parent 54fd97ae3f
commit c1fa4a7f8c
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GPG key ID: 686F07454D6CEFC3
2 changed files with 4 additions and 2 deletions
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4
external/boost/archive/portable_binary_iarchive.hpp vendored
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@ -258,7 +258,7 @@ portable_binary_iarchive::load_impl(boost::intmax_t & l, char maxsize){
this->primitive_base_t::load_binary(cptr, size); this->primitive_base_t::load_binary(cptr, size);
#if BOOST_ENDIAN_BIG_BYTE #if BOOST_ENDIAN_BIG_BYTE
if(m_flags & endian_little) if((m_flags & endian_little) || (!(m_flags & endian_big)))
#else #else
if(m_flags & endian_big) if(m_flags & endian_big)
#endif #endif
@ -343,6 +343,8 @@ portable_binary_iarchive::init(unsigned int flags){
); );
#endif #endif
} }
if (!(m_flags & (endian_little | endian_big)))
m_flags |= endian_little;
unsigned char x; unsigned char x;
load(x); load(x);
m_flags = x << CHAR_BIT; m_flags = x << CHAR_BIT;

2
external/boost/archive/portable_binary_oarchive.hpp vendored
View file

@ -171,7 +171,7 @@ protected:
void init(unsigned int flags); void init(unsigned int flags);
public: public:
portable_binary_oarchive(std::ostream & os, unsigned flags = 0) : portable_binary_oarchive(std::ostream & os, unsigned flags = endian_little) :
primitive_base_t( primitive_base_t(
* os.rdbuf(), * os.rdbuf(),
0 != (flags & boost::archive::no_codecvt) 0 != (flags & boost::archive::no_codecvt)