99 lines
1.9 KiB
C++
99 lines
1.9 KiB
C++
// misc.cpp - written and placed in the public domain by Wei Dai
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#include "pch.h"
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#ifndef CRYPTOPP_IMPORTS
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#include "misc.h"
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#include "words.h"
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#include <new>
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NAMESPACE_BEGIN(CryptoPP)
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void xorbuf(byte *buf, const byte *mask, size_t count)
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{
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size_t i;
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if (IsAligned<word32>(buf) && IsAligned<word32>(mask))
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{
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#if defined(WORD64_AVAILABLE) && !defined(CRYPTOPP_SLOW_WORD64)
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if (IsAligned<word64>(buf) && IsAligned<word64>(mask))
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{
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for (i=0; i<count/8; i++)
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((word64*)buf)[i] ^= ((word64*)mask)[i];
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count -= 8*i;
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if (!count)
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return;
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buf += 8*i;
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mask += 8*i;
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}
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#endif
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for (i=0; i<count/4; i++)
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((word32*)buf)[i] ^= ((word32*)mask)[i];
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count -= 4*i;
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if (!count)
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return;
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buf += 4*i;
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mask += 4*i;
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}
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for (i=0; i<count; i++)
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buf[i] ^= mask[i];
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}
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void xorbuf(byte *output, const byte *input, const byte *mask, size_t count)
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{
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size_t i;
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if (IsAligned<word32>(output) && IsAligned<word32>(input) && IsAligned<word32>(mask))
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{
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#if defined(WORD64_AVAILABLE) && !defined(CRYPTOPP_SLOW_WORD64)
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if (IsAligned<word64>(output) && IsAligned<word64>(input) && IsAligned<word64>(mask))
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{
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for (i=0; i<count/8; i++)
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((word64*)output)[i] = ((word64*)input)[i] ^ ((word64*)mask)[i];
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count -= 8*i;
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if (!count)
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return;
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output += 8*i;
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input += 8*i;
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mask += 8*i;
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}
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#endif
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for (i=0; i<count/4; i++)
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((word32*)output)[i] = ((word32*)input)[i] ^ ((word32*)mask)[i];
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count -= 4*i;
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if (!count)
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return;
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output += 4*i;
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input += 4*i;
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mask += 4*i;
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}
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for (i=0; i<count; i++)
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output[i] = input[i] ^ mask[i];
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}
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#if !(defined(_MSC_VER) && (_MSC_VER < 1300))
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using std::new_handler;
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using std::set_new_handler;
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#endif
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void CallNewHandler()
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{
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new_handler newHandler = set_new_handler(NULL);
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if (newHandler)
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set_new_handler(newHandler);
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if (newHandler)
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newHandler();
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else
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throw std::bad_alloc();
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}
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NAMESPACE_END
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#endif
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