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payload_getters.go
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/
payload_getters.go
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package main
import (
"github.com/tigrawap/goader/utils"
"math/rand"
"runtime"
)
type fullPayload struct {
data []byte
}
func (p *fullPayload) Get() []byte {
return p.data
}
func (p *fullPayload) GetFull() []byte {
return p.data
}
func (p *fullPayload) GetLength() int64 {
return int64(len(p.data))
}
func newFullPayload(data []byte) *fullPayload {
return &fullPayload{data}
}
type randomPayload struct {
data []byte
min int64
max int64
}
func (p *randomPayload) Get() []byte {
return p.data[0:p.GetLength()]
}
func (p *randomPayload) GetFull() []byte {
return p.data
}
func (p *randomPayload) GetLength() int64 {
if p.max == p.min {
return p.max
}
return p.min + rand.Int63n(p.max-p.min)
}
func newRandomPayload(data []byte, min int64) *randomPayload {
max := int64(len(data))
return &randomPayload{data, min, max}
}
type fairRandomPayload struct {
data []byte
min int64
max int64
roller *utils.WeightedRoller
}
func (p *fairRandomPayload) Get() []byte {
return p.data[0:p.GetLength()]
}
func (p *fairRandomPayload) GetFull() []byte {
return p.data
}
func (p *fairRandomPayload) GetLength() int64 {
return p.roller.Roll()
}
func newFairPayload(data []byte, min int64, buckets int) *fairRandomPayload {
max := int64(len(data))
roller := utils.NewWeightedRoller(min, max, int64(buckets))
return &fairRandomPayload{
data: data,
min: min,
max: max,
roller: roller,
}
}
type scratchDataPayloadGetter struct {
data [][]byte
}
func newScratchDataPayloadGetter(maxSize int) scratchDataPayloadGetter {
numBuffers := utils.MinInt(runtime.NumCPU()/2, 4) // No more then 4 buffers
if numBuffers == 0 {
numBuffers = 1
}
s := scratchDataPayloadGetter{
data: make([][]byte, numBuffers),
}
for i := 0; i < numBuffers; i++ {
s.data[i] = make([]byte, maxSize)
}
return s
}
func (s scratchDataPayloadGetter) GetBuffer(size int64) []byte {
buff := s.data[rand.Intn(len(s.data))]
return buff[:size]
}