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package roaring
import (
"fmt"
)
// common to rle32.go and rle16.go
// rleVerbose controls whether p() prints show up.
// The testing package sets this based on
// testing.Verbose().
var rleVerbose bool
// p is a shorthand for fmt.Printf with beginning and
// trailing newlines. p() makes it easy
// to add diagnostic print statements.
func p(format string, args ...interface{}) {
if rleVerbose {
fmt.Printf("\n"+format+"\n", args...)
}
}
// MaxUint32 is the largest uint32 value.
const MaxUint32 = 4294967295
// MaxUint16 is the largest 16 bit unsigned int.
// This is the largest value an interval16 can store.
const MaxUint16 = 65535
// searchOptions allows us to accelerate runContainer32.search with
// prior knowledge of (mostly lower) bounds. This is used by Union
// and Intersect.
type searchOptions struct {
// start here instead of at 0
startIndex int64
// upper bound instead of len(rc.iv);
// endxIndex == 0 means ignore the bound and use
// endxIndex == n ==len(rc.iv) which is also
// naturally the default for search()
// when opt = nil.
endxIndex int64
}
// And finds the intersection of rc and b.
func (rc *runContainer32) And(b *Bitmap) *Bitmap {
out := NewBitmap()
for _, p := range rc.iv {
for i := p.start; i <= p.last; i++ {
if b.Contains(i) {
out.Add(i)
}
}
}
return out
}
// Xor returns the exclusive-or of rc and b.
func (rc *runContainer32) Xor(b *Bitmap) *Bitmap {
out := b.Clone()
for _, p := range rc.iv {
for v := p.start; v <= p.last; v++ {
if out.Contains(v) {
out.RemoveRange(uint64(v), uint64(v+1))
} else {
out.Add(v)
}
}
}
return out
}
// Or returns the union of rc and b.
func (rc *runContainer32) Or(b *Bitmap) *Bitmap {
out := b.Clone()
for _, p := range rc.iv {
for v := p.start; v <= p.last; v++ {
out.Add(v)
}
}
return out
}
// trial is used in the randomized testing of runContainers
type trial struct {
n int
percentFill float64
ntrial int
// only in the union test
// only subtract test
percentDelete float64
// only in 067 randomized operations
// we do this + 1 passes
numRandomOpsPass int
// allow sampling range control
// only recent tests respect this.
srang *interval16
}
// And finds the intersection of rc and b.
func (rc *runContainer16) And(b *Bitmap) *Bitmap {
out := NewBitmap()
for _, p := range rc.iv {
plast := p.last()
for i := p.start; i <= plast; i++ {
if b.Contains(uint32(i)) {
out.Add(uint32(i))
}
}
}
return out
}
// Xor returns the exclusive-or of rc and b.
func (rc *runContainer16) Xor(b *Bitmap) *Bitmap {
out := b.Clone()
for _, p := range rc.iv {
plast := p.last()
for v := p.start; v <= plast; v++ {
w := uint32(v)
if out.Contains(w) {
out.RemoveRange(uint64(w), uint64(w+1))
} else {
out.Add(w)
}
}
}
return out
}
// Or returns the union of rc and b.
func (rc *runContainer16) Or(b *Bitmap) *Bitmap {
out := b.Clone()
for _, p := range rc.iv {
plast := p.last()
for v := p.start; v <= plast; v++ {
out.Add(uint32(v))
}
}
return out
}
//func (rc *runContainer32) and(container) container {
// panic("TODO. not yet implemented")
//}
// serializedSizeInBytes returns the number of bytes of memory
// required by this runContainer16. This is for the
// Roaring format, as specified https://github.com/RoaringBitmap/RoaringFormatSpec/
func (rc *runContainer16) serializedSizeInBytes() int {
// number of runs in one uint16, then each run
// needs two more uint16
return 2 + len(rc.iv)*4
}
// serializedSizeInBytes returns the number of bytes of memory
// required by this runContainer32.
func (rc *runContainer32) serializedSizeInBytes() int {
return 4 + len(rc.iv)*8
}
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