/
utils.go
129 lines (121 loc) · 1.77 KB
/
utils.go
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package metrics
func Max(a, b int) int {
if a > b {
return a
}
return b
}
func Min(a, b int) int {
if a <= b {
return a
}
return b
}
func IsSortedSliceInt64Ge(a []int64) (sorted bool) {
if len(a) == 0 {
return
}
sorted = true
prev := a[0]
for i := 1; i < len(a); i++ {
if a[i] <= prev {
sorted = false
break
}
prev = a[i]
}
return
}
func IsSortedSliceUint64Le(a []uint64) (sorted bool) {
if len(a) == 0 {
return
}
sorted = true
prev := a[0]
for i := 1; i < len(a); i++ {
if a[i] <= prev {
sorted = false
break
}
prev = a[i]
}
return
}
func IsSortedSliceFloat64Le(a []float64) (sorted bool) {
if len(a) == 0 {
return
}
sorted = true
prev := a[0]
for i := 1; i < len(a); i++ {
if a[i] <= prev {
sorted = false
break
}
prev = a[i]
}
return
}
func SearchInt64Le(a []int64, v int64) int {
if v <= a[0] {
return 0
}
start := 0
end := len(a) - 1
// if end == 0 || v > a[end] {
// return end
// }
for end > start {
mid := start + (end-start)/2
if v > a[mid] {
start = mid + 1
} else if v == a[mid] {
return mid
} else {
end = mid
}
}
return end
}
func SearchUint64Le(a []uint64, v uint64) int {
if v <= a[0] {
return 0
}
start := 0
end := len(a) - 1
// if end == 0 || v > a[end] {
// return end
// }
for end > start {
mid := start + (end-start)/2
if v > a[mid] {
start = mid + 1
} else if v == a[mid] {
return mid
} else {
end = mid
}
}
return end
}
func SearchFloat64Le(a []float64, v float64) int {
if v <= a[0] {
return 0
}
start := 0
end := len(a) - 1
if end == 0 || v > a[end] {
return end
}
for end > start {
mid := start + (end-start)/2
if v > a[mid] {
start = mid + 1
} else if v == a[mid] {
return mid
} else {
end = mid
}
}
return end
}