winamp/Src/nde/Int128Field.cpp

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2024-09-24 12:54:57 +00:00
/* ---------------------------------------------------------------------------
Nullsoft Database Engine
--------------------
codename: Near Death Experience
--------------------------------------------------------------------------- */
/* ---------------------------------------------------------------------------
Int128Field Class
Field data layout:
[16 bytes] value
--------------------------------------------------------------------------- */
#include "nde.h"
#include "Int128Field.h"
#include <time.h>
//---------------------------------------------------------------------------
Int128Field::Int128Field(void *data)
{
InitField();
Type = FIELD_INT128;
memcpy(Value, data, 16);
}
//---------------------------------------------------------------------------
void Int128Field::InitField(void)
{
Type = FIELD_INT128;
memset(Value, 0, 16);
}
//---------------------------------------------------------------------------
Int128Field::Int128Field()
{
InitField();
}
//---------------------------------------------------------------------------
Int128Field::~Int128Field()
{
}
//---------------------------------------------------------------------------
void Int128Field::ReadTypedData(const uint8_t *data, size_t len)
{
if (len < 16) return;
memcpy(Value, data, 16);
}
//---------------------------------------------------------------------------
void Int128Field::WriteTypedData(uint8_t *data, size_t len)
{
if (len < 16) return;
memcpy(data, Value, 16);
}
//---------------------------------------------------------------------------
void *Int128Field::GetValue(void)
{
return Value;
}
//---------------------------------------------------------------------------
void Int128Field::SetValue(const void *Val)
{
memcpy(Value, Val, 16);
}
//---------------------------------------------------------------------------
size_t Int128Field::GetDataSize(void)
{
return 16;
}
//---------------------------------------------------------------------------
int Int128Field::Compare(Field *Entry)
{
if (!Entry) return -1;
return memcmp(Value, ((Int128Field*)Entry)->GetValue(), 16);
}
static char zerobuf[16]={0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0};
//---------------------------------------------------------------------------
bool Int128Field::ApplyFilter(Field *Data, int op)
{
void *p = ((Int128Field *)Data)->GetValue();
void *d = Value;
if (!p)
p = zerobuf;
if (!d)
d = zerobuf;
bool r;
switch (op)
{
case FILTER_EQUALS:
r = !memcmp(d, p, 16);
break;
case FILTER_CONTAINS:
r = !memcmp(d, p, 16);
break;
case FILTER_ABOVE:
r = (memcmp(d, p, 16) > 0);
break;
case FILTER_BELOW:
r = (memcmp(d, p, 16) < 0);
break;
case FILTER_BELOWOREQUAL:
r = (memcmp(d, p, 16) <= 0);
break;
case FILTER_ABOVEOREQUAL:
r = (memcmp(d, p, 16) >= 0);
break;
case FILTER_ISEMPTY:
r = !d || (!memcmp(d, zerobuf, 16));
break;
case FILTER_ISNOTEMPTY:
r = d && (memcmp(d, zerobuf, 16));
break;
default:
r = true;
break;
}
return r;
}