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644d55475d
Also move the non crypto hash funcs into this new package. This is much faster than e.g. MD5, especially for larger inputs: ``` BenchmarkXxHash/xxHash_43-10 9917955 112.2 ns/op 56 B/op 4 allocs/op BenchmarkXxHash/mdb5_43-10 6017239 204.1 ns/op 96 B/op 3 allocs/op BenchmarkXxHash/fnv32a_43-10 14407333 82.30 ns/op 16 B/op 1 allocs/op BenchmarkXxHash/xxHash_4300-10 2916892 409.7 ns/op 56 B/op 4 allocs/op BenchmarkXxHash/mdb5_4300-10 159748 7491 ns/op 4912 B/op 3 allocs/op BenchmarkXxHash/fnv32a_4300-10 218210 5510 ns/op 16 B/op 1 allocs/op ``` Fixes #12635
93 lines
2.3 KiB
Go
93 lines
2.3 KiB
Go
// Copyright 2024 The Hugo Authors. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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// Package hash provides non-cryptographic hash functions for template use.
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package hash
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import (
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"context"
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"encoding/hex"
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"hash/fnv"
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"github.com/cespare/xxhash/v2"
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"github.com/gohugoio/hugo/deps"
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"github.com/gohugoio/hugo/tpl/internal"
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"github.com/spf13/cast"
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)
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// New returns a new instance of the hash-namespaced template functions.
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func New() *Namespace {
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return &Namespace{}
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}
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// Namespace provides template functions for the "hash" namespace.
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type Namespace struct{}
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// FNV32a hashes v using fnv32a algorithm.
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func (ns *Namespace) FNV32a(v any) (int, error) {
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conv, err := cast.ToStringE(v)
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if err != nil {
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return 0, err
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}
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algorithm := fnv.New32a()
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algorithm.Write([]byte(conv))
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return int(algorithm.Sum32()), nil
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}
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// XxHash returns the xxHash of the input string.
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func (ns *Namespace) XxHash(v any) (string, error) {
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conv, err := cast.ToStringE(v)
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if err != nil {
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return "", err
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}
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hasher := xxhash.New()
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_, err = hasher.WriteString(conv)
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if err != nil {
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return "", err
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}
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hash := hasher.Sum(nil)
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return hex.EncodeToString(hash), nil
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}
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const name = "hash"
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func init() {
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f := func(d *deps.Deps) *internal.TemplateFuncsNamespace {
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ctx := New()
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ns := &internal.TemplateFuncsNamespace{
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Name: name,
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Context: func(cctx context.Context, args ...any) (any, error) { return ctx, nil },
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}
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ns.AddMethodMapping(ctx.XxHash,
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[]string{"xxhash"},
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[][2]string{
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{`{{ hash.XxHash "The quick brown fox jumps over the lazy dog" }}`, `0b242d361fda71bc`},
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},
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)
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ns.AddMethodMapping(ctx.FNV32a,
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nil,
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[][2]string{
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{`{{ hash.FNV32a "Hugo Rocks!!" }}`, `1515779328`},
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},
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)
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return ns
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}
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internal.AddTemplateFuncsNamespace(f)
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}
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