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// misc.cpp - written and placed in the public domain by Wei Dai
#include "pch.h"
#ifndef CRYPTOPP_IMPORTS
#include "misc.h"
#include "words.h"
#include <new>
NAMESPACE_BEGIN(CryptoPP)
void xorbuf(byte *buf, const byte *mask, size_t count)
{
size_t i;
if (IsAligned<word32>(buf) && IsAligned<word32>(mask))
{
if (!CRYPTOPP_BOOL_SLOW_WORD64 && IsAligned<word64>(buf) && IsAligned<word64>(mask))
{
for (i=0; i<count/8; i++)
((word64*)buf)[i] ^= ((word64*)mask)[i];
count -= 8*i;
if (!count)
return;
buf += 8*i;
mask += 8*i;
}
for (i=0; i<count/4; i++)
((word32*)buf)[i] ^= ((word32*)mask)[i];
count -= 4*i;
if (!count)
return;
buf += 4*i;
mask += 4*i;
}
for (i=0; i<count; i++)
buf[i] ^= mask[i];
}
void xorbuf(byte *output, const byte *input, const byte *mask, size_t count)
{
size_t i;
if (IsAligned<word32>(output) && IsAligned<word32>(input) && IsAligned<word32>(mask))
{
if (!CRYPTOPP_BOOL_SLOW_WORD64 && IsAligned<word64>(output) && IsAligned<word64>(input) && IsAligned<word64>(mask))
{
for (i=0; i<count/8; i++)
((word64*)output)[i] = ((word64*)input)[i] ^ ((word64*)mask)[i];
count -= 8*i;
if (!count)
return;
output += 8*i;
input += 8*i;
mask += 8*i;
}
for (i=0; i<count/4; i++)
((word32*)output)[i] = ((word32*)input)[i] ^ ((word32*)mask)[i];
count -= 4*i;
if (!count)
return;
output += 4*i;
input += 4*i;
mask += 4*i;
}
for (i=0; i<count; i++)
output[i] = input[i] ^ mask[i];
}
bool VerifyBufsEqual(const byte *buf, const byte *mask, size_t count)
{
size_t i;
byte acc8 = 0;
if (IsAligned<word32>(buf) && IsAligned<word32>(mask))
{
word32 acc32 = 0;
if (!CRYPTOPP_BOOL_SLOW_WORD64 && IsAligned<word64>(buf) && IsAligned<word64>(mask))
{
word64 acc64 = 0;
for (i=0; i<count/8; i++)
acc64 |= ((word64*)buf)[i] ^ ((word64*)mask)[i];
count -= 8*i;
if (!count)
return acc64 == 0;
buf += 8*i;
mask += 8*i;
acc32 = word32(acc64) | word32(acc64>>32);
}
for (i=0; i<count/4; i++)
acc32 |= ((word32*)buf)[i] ^ ((word32*)mask)[i];
count -= 4*i;
if (!count)
return acc32 == 0;
buf += 4*i;
mask += 4*i;
acc8 = byte(acc32) | byte(acc32>>8) | byte(acc32>>16) | byte(acc32>>24);
}
for (i=0; i<count; i++)
acc8 |= buf[i] ^ mask[i];
return acc8 == 0;
}
#if !(defined(_MSC_VER) && (_MSC_VER < 1300))
using std::new_handler;
using std::set_new_handler;
#endif
void CallNewHandler()
{
new_handler newHandler = set_new_handler(NULL);
if (newHandler)
set_new_handler(newHandler);
if (newHandler)
newHandler();
else
throw std::bad_alloc();
}
NAMESPACE_END
#endif
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