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bool xsDLL GetHexFromSF_IEEE754( void* to, Text from, ui08 tSize )
{
from.UpperCase();
int db = 0, dB = 0, dBEnd = tSize, dBLast = ( tSize - 1u ), dbEnd = dBEnd * 8;
ui08 *data = reinterpret_cast< ui08* >( to );
for ( ; dB >= 0; --dB )
data[ dB ] = 0u;
ui16 v16 = 0u;
ui32 eVU = 0u, v32 = 0u;
int eb = 0, eB = 0, eBEnd = 0, ebEnd = 0, eBLast = 0, eMax = 0, eMin = 0;
switch ( tSize )
{
case 2u:
eMax = 15;
eBEnd = 1;
ebEnd = 5;
break;
case 4u:
case 6u:
eMax = 128;
eBEnd = 2;
ebEnd = 8;
break;
case 8u:
eMax = 1024;
eBEnd = 3;
ebEnd = 11;
case 10u:
case 16u:
eMax = 16384;
eBEnd = 3;
ebEnd = 15;
break;
default:
data[ 0 ] = 0x80;
return false;
}
int mb = 0, mB = 0, mBEnd = ( tSize - eBEnd ), mbEnd = (( dbEnd - ebEnd ) - 1), mBLast = mBEnd - 1, mPos = 0;
eMin = -( eMax - 1 );
wxChar c = from[ 0 ];
ui08 mVI[ mBEnd ], mVF[ mBEnd ];
for ( ; mB < mBEnd; ++mB )
{
mVI[ mB ] = 0u;
mVF[ mB ] = 0u;
}
int i = 0, iEnd = from.Length();
bool r = true, isNeg = ( c == cNeg ), isPos = ( c == cPos ), isDot = false, isExp = false, is0 = true;
eBLast = eBEnd - 1;
if ( !isNeg && !isPos )
isPos = true;
else
++i;
mB = mBLast;
dB = 0;
// Capture
while ( db < dbEnd )
{
if ( i < iEnd )
{
c = from[ i ];
++i;
if ( c >= c0 && c <= c9 )
{
if ( db >= mbEnd && !isExp )
break;
if ( is0 )
mB = mBLast;
is0 = false;
v16 *= 10u;
v16 += ( c - c0 );
}
else if ( !isExp && !isDot && c == cDot )
{
isDot = true;
v16 = 0u;
mPos = mB;
}
else if ( !isExp && c == cE )
{
isExp = true;
v16 = 0u;
++i;
}
else
{
r = false;
continue;
}
}
else
break;
if ( isExp )
{
eVU = v16;
if ( ( eVU * 10u ) >= v32 )
break;
}
else
{
if ( c > c0 && c<= c9 )
is0 = false;
if ( isDot )
mVF[ mB ] = ( v16 & 0xFF );
else
mVI[ mB ] = ( v16 & 0xFF );
if ( v16 > 0xFFF )
{
--mB; db += 8u;
if ( db >= mbEnd )
v16 = 0u;
else
v16 >>= 8u;
}
}
}
ui08 dbv[ dbEnd ];
dbv[ 0 ] = isNeg ? 1u : 0u;
for ( db = 1; db < dbEnd; ++db )
dbv[ db ] = false;
// Mantissa
// FIXME(awsdert) IEEE754 Mantissa needs fixing
mb = 0;
mB = mPos;
while ( ( mVI[ mB ] & 0x80 ) == 0u )
{
mVI[ mB ] <<= 1u;
++mb;
if ( mb == 8 )
break;
}
v32 = 0u;
for ( i = 0, mb = 0, db = ebEnd; mb < mbEnd; ++i, ++mb, ++db, ++v32 )
{
dbv[ db ] = (( mVI[ mB ] & 0x80 ) >> 7u );
mVI[ mB ] <<= 1u;
if ( i == 7 )
{
++mB; i = 0;
}
}
dB = dBLast; dBLast -= 8;
for ( i = 0, mb = 0; mb < mbEnd; ++mb, ++db )
{
eB = mPos;
v16 = mVF[ eB ];
for ( --eB; eB >= 0; --eB )
{
v16 *= 2u;
mVF[ eB + 1 ] = ( v16 & 0xFF );
v16 >>= 8u;
mVF[ eB ] = v16;
}
is0 = ( mVF[ mPos ] == 0u );
if ( isNeg )
dbv[ db ] = is0 ? 1uLL : 0uLL;
else
dbv[ db ] = is0 ? 0uLL : 1uLL;
mVF[ mPos ] = 0u;
}
// Exponent
if ( !isExp )
eVU = v32;
// - Check Range
v32 = eMax;
while ( eVU > v32 )
eVU /= 10u;
v32 = -eMin;
if ( isNeg && eVU > v32 )
eVU -= 1u;
// - Push bits forward
// NOTE(awsdert) IEEE754 Exponent might not be recorded correctly
db = ebEnd - 8;
while ( db > 0 )
db -= 8;
for ( ; db < 0; ++db )
eVU <<= 1u;
// - Place bits in main variable
if ( isNeg )
eVU += eMax;
//*/
for ( db = 1, eb = 0; eb < ebEnd; ++eb, ++db )
{
dbv[ db ] = (( eVU & 0x80000000 ) >> 31u );
eVU <<= 1u;
}
// Put everything into pointed variable
for ( db = 0, dB = dBEnd - 1, i = 7; db < dbEnd; ++db, --i )
{
data[ dB ] |= ( dbv[ db ] << i );
if ( i == 0 )
{
--dB; i = 7;
}
}
return r;
}
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