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// Copyright Yahoo. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
#include "sortdata.h"
#include <cassert>
#include <cstring>
namespace search {
namespace common {
uint32_t
SortData::GetSize(uint32_t hitcnt, const uint32_t *sortIndex)
{
if (hitcnt == 0)
return 0;
return ((hitcnt + 1) * sizeof(uint32_t)
+ (sortIndex[hitcnt] - sortIndex[0]));
}
bool
SortData::Equals(uint32_t hitcnt,
const uint32_t *sortIndex_1, const char *sortData_1,
const uint32_t *sortIndex_2, const char *sortData_2)
{
if (hitcnt == 0)
return true;
uint32_t diff = sortIndex_2[0] - sortIndex_1[0];
for (uint32_t i = 1; i <= hitcnt; i++) {
if (diff != (sortIndex_2[i] - sortIndex_1[i]))
return false;
}
assert((sortIndex_1[hitcnt] - sortIndex_1[0]) ==
(sortIndex_2[hitcnt] - sortIndex_2[0]));
return (memcmp(sortData_1 + sortIndex_1[0],
sortData_2 + sortIndex_2[0],
sortIndex_1[hitcnt] - sortIndex_1[0]) == 0);
}
void
SortData::Copy(uint32_t hitcnt,
uint32_t *sortIndex_dst, char *sortData_dst,
const uint32_t *sortIndex_src, const char *sortData_src)
{
if (hitcnt == 0)
return;
uint32_t diff = sortIndex_dst[0] - sortIndex_src[0];
for (uint32_t i = 1; i <= hitcnt; i++) {
sortIndex_dst[i] = sortIndex_src[i] + diff;
}
assert((sortIndex_dst[hitcnt] - sortIndex_dst[0]) ==
(sortIndex_src[hitcnt] - sortIndex_src[0]));
memcpy(sortData_dst + sortIndex_dst[0],
sortData_src + sortIndex_src[0],
sortIndex_dst[hitcnt] - sortIndex_dst[0]);
}
bool
SortDataIterator::Before(SortDataIterator *other, bool beforeOnMatch)
{
uint32_t tlen = GetLen();
uint32_t olen = other->GetLen();
uint32_t mlen = (tlen <= olen) ? tlen : olen;
if (mlen == 0)
return (tlen != 0 || beforeOnMatch);
int res = memcmp(GetBuf(), other->GetBuf(), mlen);
if (res != 0)
return (res < 0);
return (tlen < olen || (tlen == olen && beforeOnMatch));
}
}
}
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