forked from forgejo/forgejo
Vendor Update (#16121)
* update github.com/PuerkitoBio/goquery * update github.com/alecthomas/chroma * update github.com/blevesearch/bleve/v2 * update github.com/caddyserver/certmagic * update github.com/go-enry/go-enry/v2 * update github.com/go-git/go-billy/v5 * update github.com/go-git/go-git/v5 * update github.com/go-redis/redis/v8 * update github.com/go-testfixtures/testfixtures/v3 * update github.com/jaytaylor/html2text * update github.com/json-iterator/go * update github.com/klauspost/compress * update github.com/markbates/goth * update github.com/mattn/go-isatty * update github.com/mholt/archiver/v3 * update github.com/microcosm-cc/bluemonday * update github.com/minio/minio-go/v7 * update github.com/prometheus/client_golang * update github.com/unrolled/render * update github.com/xanzy/go-gitlab * update github.com/yuin/goldmark * update github.com/yuin/goldmark-highlighting Co-authored-by: techknowlogick <techknowlogick@gitea.io>
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# bitset
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*Go language library to map between non-negative integers and boolean values*
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[](https://github.com/willf/bitset/actions?query=workflow%3ATest)
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[](https://goreportcard.com/report/github.com/willf/bitset)
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[](https://pkg.go.dev/github.com/bits-and-blooms/bitset?tab=doc)
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## Description
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Package bitset implements bitsets, a mapping between non-negative integers and boolean values.
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It should be more efficient than map[uint] bool.
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It provides methods for setting, clearing, flipping, and testing individual integers.
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But it also provides set intersection, union, difference, complement, and symmetric operations, as well as tests to check whether any, all, or no bits are set, and querying a bitset's current length and number of positive bits.
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BitSets are expanded to the size of the largest set bit; the memory allocation is approximately Max bits, where Max is the largest set bit. BitSets are never shrunk. On creation, a hint can be given for the number of bits that will be used.
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Many of the methods, including Set, Clear, and Flip, return a BitSet pointer, which allows for chaining.
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### Example use:
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```go
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package main
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import (
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"fmt"
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"math/rand"
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"github.com/bits-and-blooms/bitset"
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)
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func main() {
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fmt.Printf("Hello from BitSet!\n")
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var b bitset.BitSet
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// play some Go Fish
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for i := 0; i < 100; i++ {
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card1 := uint(rand.Intn(52))
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card2 := uint(rand.Intn(52))
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b.Set(card1)
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if b.Test(card2) {
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fmt.Println("Go Fish!")
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}
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b.Clear(card1)
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}
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// Chaining
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b.Set(10).Set(11)
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for i, e := b.NextSet(0); e; i, e = b.NextSet(i + 1) {
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fmt.Println("The following bit is set:", i)
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}
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if b.Intersection(bitset.New(100).Set(10)).Count() == 1 {
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fmt.Println("Intersection works.")
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} else {
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fmt.Println("Intersection doesn't work???")
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}
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}
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```
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As an alternative to BitSets, one should check out the 'big' package, which provides a (less set-theoretical) view of bitsets.
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Package documentation is at: https://pkg.go.dev/github.com/bits-and-blooms/bitset?tab=doc
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## Memory Usage
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The memory usage of a bitset using N bits is at least N/8 bytes. The number of bits in a bitset is at least as large as one plus the greatest bit index you have accessed. Thus it is possible to run out of memory while using a bitset. If you have lots of bits, you might prefer compressed bitsets, like the [Roaring bitmaps](http://roaringbitmap.org) and its [Go implementation](https://github.com/RoaringBitmap/roaring).
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## Implementation Note
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Go 1.9 introduced a native `math/bits` library. We provide backward compatibility to Go 1.7, which might be removed.
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It is possible that a later version will match the `math/bits` return signature for counts (which is `int`, rather than our library's `unit64`). If so, the version will be bumped.
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## Installation
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```bash
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go get github.com/bits-and-blooms/bitset
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```
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## Contributing
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If you wish to contribute to this project, please branch and issue a pull request against master ("[GitHub Flow](https://guides.github.com/introduction/flow/)")
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## Running all tests
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Before committing the code, please check if it passes tests, has adequate coverage, etc.
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```bash
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go test
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go test -cover
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```
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