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implement pivoting in struct search

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This commit is contained in:
Kevin Jahns
2020-06-04 18:14:41 +02:00
parent ee147c14f1
commit 7b16d5c92d
2 changed files with 13 additions and 5 deletions
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12
src/utils/StructStore.js
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@@ -124,10 +124,15 @@ export const addStruct = (store, struct) => {
export const findIndexSS = (structs, clock) => {
let left = 0
let right = structs.length - 1
let mid = structs[right]
let midclock = mid.id.clock
if (mid.id.clock === clock) {
return right
}
let midindex = math.floor((clock / (midclock + mid.length)) * right) // pivoting the search
while (left <= right) {
const midindex = math.floor((left + right) / 2)
const mid = structs[midindex]
const midclock = mid.id.clock
mid = structs[midindex]
midclock = mid.id.clock
if (midclock <= clock) {
if (clock < midclock + mid.length) {
return midindex
@@ -136,6 +141,7 @@ export const findIndexSS = (structs, clock) => {
} else {
right = midindex - 1
}
midindex = math.floor((left + right) / 2)
}
// Always check state before looking for a struct in StructStore
// Therefore the case of not finding a struct is unexpected