func (this *BP32) Uncompress(in []int32, inpos *cursor.Cursor, inlength int, out []int32, outpos *cursor.Cursor) error {
if inlength == 0 {
return errors.New("zigzag_bp32/Uncompress: Length is 0. No work done.")
}
outlength := int(in[inpos.Get()])
inpos.Increment()
tmpinpos := inpos.Get()
s := outpos.Get()
finalinpos := s + outlength
delta := make([]int32, DefaultBlockSize)
//log.Printf("zigzag_bp32/Uncompress: outlength = %d, inpos = %d, outpos = %d\n", outlength, inpos.Get(), outpos.Get())
for ; s < finalinpos; s += DefaultBlockSize {
tmp := in[tmpinpos]
mbits1 := tmp >> 24
mbits2 := (tmp >> 16) & 0xFF
mbits3 := (tmp >> 8) & 0xFF
mbits4 := (tmp) & 0xFF
//log.Printf("zigzag_bp32/Uncopmress: mbits1 = %d, mbits2 = %d, mbits3 = %d, mbits4 = %d, s = %d\n", mbits1, mbits2, mbits3, mbits4, s)
tmpinpos += 1
bitpacking.FastUnpack(in, tmpinpos, delta, 0, int(mbits1))
tmpinpos += int(mbits1)
//log.Printf("zigzag_bp32/Uncompress: delta = %v\n", out)
bitpacking.FastUnpack(in, tmpinpos, delta, 32, int(mbits2))
tmpinpos += int(mbits2)
//log.Printf("zigzag_bp32/Uncompress: delta = %v\n", out)
bitpacking.FastUnpack(in, tmpinpos, delta, 64, int(mbits3))
tmpinpos += int(mbits3)
//log.Printf("zigzag_bp32/Uncompress: delta = %v\n", out)
bitpacking.FastUnpack(in, tmpinpos, delta, 96, int(mbits4))
tmpinpos += int(mbits4)
encoding.InverseZigZagDelta(delta, out[s:s+DefaultBlockSize])
//log.Printf("zigzag_bp32/Uncompress: delta = %v\n", delta)
//log.Printf("zigzag_bp32/Uncompress: out = %v\n", out[s:s+DefaultBlockSize])
}
outpos.Add(outlength)
inpos.Set(tmpinpos)
return nil
}
func (this *BP32) Uncompress(in []int32, inpos *cursor.Cursor, inlength int, out []int32, outpos *cursor.Cursor) error {
if inlength == 0 {
return errors.New("BP32/Uncompress: Length is 0. No work done.")
}
outlength := int(in[inpos.Get()])
inpos.Increment()
tmpinpos := inpos.Get()
for s := outpos.Get(); s < outpos.Get()+outlength; s += 32 * 4 {
tmp := in[tmpinpos]
mbits1 := tmp >> 24
mbits2 := (tmp >> 16) & 0xFF
mbits3 := (tmp >> 8) & 0xFF
mbits4 := (tmp) & 0xFF
tmpinpos += 1
bitpacking.FastUnpack(in, tmpinpos, out, s, int(mbits1))
tmpinpos += int(mbits1)
bitpacking.FastUnpack(in, tmpinpos, out, s+32, int(mbits2))
tmpinpos += int(mbits2)
bitpacking.FastUnpack(in, tmpinpos, out, s+2*32, int(mbits3))
tmpinpos += int(mbits3)
bitpacking.FastUnpack(in, tmpinpos, out, s+3*32, int(mbits4))
tmpinpos += int(mbits4)
}
outpos.Add(outlength)
inpos.Set(tmpinpos)
return nil
}
func (this *FastPFOR) decodePage(in []int32, inpos *cursor.Cursor, out []int32, outpos *cursor.Cursor, thissize int, initoffset *cursor.Cursor) error {
initpos := int32(inpos.Get())
wheremeta := in[initpos]
inpos.Increment()
inexcept := initpos + wheremeta
bytesize := in[inexcept]
inexcept += 1
this.byteContainer.Clear()
if err := this.byteContainer.AsInt32Buffer().PutInt32s(in, int(inexcept), int(bytesize/4)); err != nil {
return err
}
inexcept += bytesize / 4
bitmap := in[inexcept]
inexcept += 1
for k := int32(1); k < 33; k++ {
if bitmap&(1<<uint32(k-1)) != 0 {
size := in[inexcept]
inexcept += 1
if int32(len(this.dataToBePacked[k])) < size {
this.dataToBePacked[k] = make([]int32, encoding.CeilBy(int(size), 32))
}
for j := int32(0); j < size; j += 32 {
bitpacking.FastUnpack(in, int(inexcept), this.dataToBePacked[k], int(j), int(k))
inexcept += k
}
}
}
copy(this.dataPointers, zeroDataPointers)
tmpoutpos := int32(outpos.Get())
tmpinpos := int32(inpos.Get())
delta := make([]int32, DefaultBlockSize)
run := 0
run_end := thissize / DefaultBlockSize
for run < run_end {
var err error
var bestb int32
if bestb, err = this.byteContainer.GetAsInt32(); err != nil {
return err
}
var cexcept int32
if cexcept, err = this.byteContainer.GetAsInt32(); err != nil {
return err
}
for k := int32(0); k < 128; k += 32 {
//bitpacking.FastUnpack(in, int(tmpinpos), out, int(tmpoutpos+k), int(bestb))
bitpacking.FastUnpack(in, int(tmpinpos), delta, int(k), int(bestb))
tmpinpos += bestb
}
if cexcept > 0 {
var maxbits int32
if maxbits, err = this.byteContainer.GetAsInt32(); err != nil {
return err
}
index := maxbits - bestb
for k := int32(0); k < cexcept; k++ {
var pos int32
if pos, err = this.byteContainer.GetAsInt32(); err != nil {
return err
}
exceptvalue := this.dataToBePacked[index][this.dataPointers[index]]
this.dataPointers[index] += 1
//out[pos + tmpoutpos] |= exceptvalue << uint(bestb)
delta[pos] |= exceptvalue << uint(bestb)
}
}
// Calculate the original from the deltas, inlining to gain a bit of performance
offset := int32(initoffset.Get())
for i, v := range delta {
n := int32(uint32(v)>>1) ^ ((v << 31) >> 31)
out[int(tmpoutpos)+i] = n + offset
offset += n
}
initoffset.Set(int(out[tmpoutpos+DefaultBlockSize-1]))
run += 1
tmpoutpos += DefaultBlockSize
}
outpos.Set(int(tmpoutpos))
inpos.Set(int(inexcept))
return nil
}
func (this *FastPFOR) decodePage(in []int32, inpos *cursor.Cursor, out []int32, outpos *cursor.Cursor, thissize int) error {
initpos := int32(inpos.Get())
wheremeta := in[initpos]
inpos.Increment()
inexcept := initpos + wheremeta
bytesize := in[inexcept]
inexcept += 1
mybytearray := in[inexcept:]
mybp := uint(0)
inexcept += (bytesize + 3) / 4
bitmap := in[inexcept]
inexcept += 1
for k := int32(1); k < 33; k++ {
if bitmap&(1<<uint32(k-1)) != 0 {
size := in[inexcept]
inexcept += 1
if int32(len(this.dataToBePacked[k])) < size {
this.dataToBePacked[k] = make([]int32, encoding.CeilBy(int(size), 32))
}
for j := int32(0); j < size; j += 32 {
bitpacking.FastUnpack(in, int(inexcept), this.dataToBePacked[k], int(j), int(k))
inexcept += k
}
}
}
copy(this.dataPointers, zeroDataPointers)
tmpoutpos := uint32(outpos.Get())
tmpinpos := uint32(inpos.Get())
run := 0
run_end := thissize / DefaultBlockSize
for run < run_end {
bestb := uint32(grapByte(mybytearray, mybp))
mybp++
cexcept := int32(grapByte(mybytearray, mybp))
mybp++
for k := uint32(0); k < 128; k += 32 {
bitpacking.FastUnpack(in, int(tmpinpos), out, int(tmpoutpos+k), int(bestb))
tmpinpos += bestb
}
if cexcept > 0 {
maxbits := uint32(grapByte(mybytearray, mybp))
mybp++
index := maxbits - bestb
// assuming that the Go compiler is bad, we move everything that is indexed outside the upcoming loop
packedexceptions := this.dataToBePacked[index]
myindex := this.dataPointers[index]
for k := int32(0); k < cexcept; k++ {
pos := uint32(grapByte(mybytearray, mybp))
mybp++
exceptvalue := packedexceptions[myindex]
myindex++
out[pos+tmpoutpos] |= exceptvalue << bestb
}
this.dataPointers[index] = myindex
}
run += 1
tmpoutpos += DefaultBlockSize
}
outpos.Set(int(tmpoutpos))
inpos.Set(int(inexcept))
return nil
}
