diff options
Diffstat (limited to 'src/dma/vendor/github.com/valyala/fasttemplate')
7 files changed, 462 insertions, 0 deletions
diff --git a/src/dma/vendor/github.com/valyala/fasttemplate/LICENSE b/src/dma/vendor/github.com/valyala/fasttemplate/LICENSE new file mode 100644 index 00000000..7125a63c --- /dev/null +++ b/src/dma/vendor/github.com/valyala/fasttemplate/LICENSE @@ -0,0 +1,22 @@ +The MIT License (MIT) + +Copyright (c) 2015 Aliaksandr Valialkin + +Permission is hereby granted, free of charge, to any person obtaining a copy +of this software and associated documentation files (the "Software"), to deal +in the Software without restriction, including without limitation the rights +to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +copies of the Software, and to permit persons to whom the Software is +furnished to do so, subject to the following conditions: + +The above copyright notice and this permission notice shall be included in all +copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE +SOFTWARE. + diff --git a/src/dma/vendor/github.com/valyala/fasttemplate/README.md b/src/dma/vendor/github.com/valyala/fasttemplate/README.md new file mode 100644 index 00000000..3a4d56ce --- /dev/null +++ b/src/dma/vendor/github.com/valyala/fasttemplate/README.md @@ -0,0 +1,85 @@ +fasttemplate +============ + +Simple and fast template engine for Go. + +Fasttemplate peforms only a single task - it substitutes template placeholders +with user-defined values. At high speed :) + +Take a look at [quicktemplate](https://github.com/valyala/quicktemplate) if you need fast yet powerful html template engine. + +*Please note that fasttemplate doesn't do any escaping on template values +unlike [html/template](http://golang.org/pkg/html/template/) do. So values +must be properly escaped before passing them to fasttemplate.* + +Fasttemplate is faster than [text/template](http://golang.org/pkg/text/template/), +[strings.Replace](http://golang.org/pkg/strings/#Replace), +[strings.Replacer](http://golang.org/pkg/strings/#Replacer) +and [fmt.Fprintf](https://golang.org/pkg/fmt/#Fprintf) on placeholders' substitution. + +Below are benchmark results comparing fasttemplate performance to text/template, +strings.Replace, strings.Replacer and fmt.Fprintf: + +``` +$ go test -bench=. -benchmem +PASS +BenchmarkFmtFprintf-4 2000000 790 ns/op 0 B/op 0 allocs/op +BenchmarkStringsReplace-4 500000 3474 ns/op 2112 B/op 14 allocs/op +BenchmarkStringsReplacer-4 500000 2657 ns/op 2256 B/op 23 allocs/op +BenchmarkTextTemplate-4 500000 3333 ns/op 336 B/op 19 allocs/op +BenchmarkFastTemplateExecuteFunc-4 5000000 349 ns/op 0 B/op 0 allocs/op +BenchmarkFastTemplateExecute-4 3000000 383 ns/op 0 B/op 0 allocs/op +BenchmarkFastTemplateExecuteFuncString-4 3000000 549 ns/op 144 B/op 1 allocs/op +BenchmarkFastTemplateExecuteString-4 3000000 572 ns/op 144 B/op 1 allocs/op +BenchmarkFastTemplateExecuteTagFunc-4 2000000 743 ns/op 144 B/op 3 allocs/op +``` + + +Docs +==== + +See http://godoc.org/github.com/valyala/fasttemplate . + + +Usage +===== + +```go + template := "http://{{host}}/?q={{query}}&foo={{bar}}{{bar}}" + t := fasttemplate.New(template, "{{", "}}") + s := t.ExecuteString(map[string]interface{}{ + "host": "google.com", + "query": url.QueryEscape("hello=world"), + "bar": "foobar", + }) + fmt.Printf("%s", s) + + // Output: + // http://google.com/?q=hello%3Dworld&foo=foobarfoobar +``` + + +Advanced usage +============== + +```go + template := "Hello, [user]! You won [prize]!!! [foobar]" + t, err := fasttemplate.NewTemplate(template, "[", "]") + if err != nil { + log.Fatalf("unexpected error when parsing template: %s", err) + } + s := t.ExecuteFuncString(func(w io.Writer, tag string) (int, error) { + switch tag { + case "user": + return w.Write([]byte("John")) + case "prize": + return w.Write([]byte("$100500")) + default: + return w.Write([]byte(fmt.Sprintf("[unknown tag %q]", tag))) + } + }) + fmt.Printf("%s", s) + + // Output: + // Hello, John! You won $100500!!! [unknown tag "foobar"] +``` diff --git a/src/dma/vendor/github.com/valyala/fasttemplate/go.mod b/src/dma/vendor/github.com/valyala/fasttemplate/go.mod new file mode 100644 index 00000000..6015c4b5 --- /dev/null +++ b/src/dma/vendor/github.com/valyala/fasttemplate/go.mod @@ -0,0 +1,3 @@ +module github.com/valyala/fasttemplate + +require github.com/valyala/bytebufferpool v1.0.0 diff --git a/src/dma/vendor/github.com/valyala/fasttemplate/go.sum b/src/dma/vendor/github.com/valyala/fasttemplate/go.sum new file mode 100644 index 00000000..c10c48c2 --- /dev/null +++ b/src/dma/vendor/github.com/valyala/fasttemplate/go.sum @@ -0,0 +1,2 @@ +github.com/valyala/bytebufferpool v1.0.0 h1:GqA5TC/0021Y/b9FG4Oi9Mr3q7XYx6KllzawFIhcdPw= +github.com/valyala/bytebufferpool v1.0.0/go.mod h1:6bBcMArwyJ5K/AmCkWv1jt77kVWyCJ6HpOuEn7z0Csc= diff --git a/src/dma/vendor/github.com/valyala/fasttemplate/template.go b/src/dma/vendor/github.com/valyala/fasttemplate/template.go new file mode 100644 index 00000000..91209201 --- /dev/null +++ b/src/dma/vendor/github.com/valyala/fasttemplate/template.go @@ -0,0 +1,317 @@ +// Package fasttemplate implements simple and fast template library. +// +// Fasttemplate is faster than text/template, strings.Replace +// and strings.Replacer. +// +// Fasttemplate ideally fits for fast and simple placeholders' substitutions. +package fasttemplate + +import ( + "bytes" + "fmt" + "github.com/valyala/bytebufferpool" + "io" +) + +// ExecuteFunc calls f on each template tag (placeholder) occurrence. +// +// Returns the number of bytes written to w. +// +// This function is optimized for constantly changing templates. +// Use Template.ExecuteFunc for frozen templates. +func ExecuteFunc(template, startTag, endTag string, w io.Writer, f TagFunc) (int64, error) { + s := unsafeString2Bytes(template) + a := unsafeString2Bytes(startTag) + b := unsafeString2Bytes(endTag) + + var nn int64 + var ni int + var err error + for { + n := bytes.Index(s, a) + if n < 0 { + break + } + ni, err = w.Write(s[:n]) + nn += int64(ni) + if err != nil { + return nn, err + } + + s = s[n+len(a):] + n = bytes.Index(s, b) + if n < 0 { + // cannot find end tag - just write it to the output. + ni, _ = w.Write(a) + nn += int64(ni) + break + } + + ni, err = f(w, unsafeBytes2String(s[:n])) + nn += int64(ni) + s = s[n+len(b):] + } + ni, err = w.Write(s) + nn += int64(ni) + + return nn, err +} + +// Execute substitutes template tags (placeholders) with the corresponding +// values from the map m and writes the result to the given writer w. +// +// Substitution map m may contain values with the following types: +// * []byte - the fastest value type +// * string - convenient value type +// * TagFunc - flexible value type +// +// Returns the number of bytes written to w. +// +// This function is optimized for constantly changing templates. +// Use Template.Execute for frozen templates. +func Execute(template, startTag, endTag string, w io.Writer, m map[string]interface{}) (int64, error) { + return ExecuteFunc(template, startTag, endTag, w, func(w io.Writer, tag string) (int, error) { return stdTagFunc(w, tag, m) }) +} + +// ExecuteFuncString calls f on each template tag (placeholder) occurrence +// and substitutes it with the data written to TagFunc's w. +// +// Returns the resulting string. +// +// This function is optimized for constantly changing templates. +// Use Template.ExecuteFuncString for frozen templates. +func ExecuteFuncString(template, startTag, endTag string, f TagFunc) string { + tagsCount := bytes.Count(unsafeString2Bytes(template), unsafeString2Bytes(startTag)) + if tagsCount == 0 { + return template + } + + bb := byteBufferPool.Get() + if _, err := ExecuteFunc(template, startTag, endTag, bb, f); err != nil { + panic(fmt.Sprintf("unexpected error: %s", err)) + } + s := string(bb.B) + bb.Reset() + byteBufferPool.Put(bb) + return s +} + +var byteBufferPool bytebufferpool.Pool + +// ExecuteString substitutes template tags (placeholders) with the corresponding +// values from the map m and returns the result. +// +// Substitution map m may contain values with the following types: +// * []byte - the fastest value type +// * string - convenient value type +// * TagFunc - flexible value type +// +// This function is optimized for constantly changing templates. +// Use Template.ExecuteString for frozen templates. +func ExecuteString(template, startTag, endTag string, m map[string]interface{}) string { + return ExecuteFuncString(template, startTag, endTag, func(w io.Writer, tag string) (int, error) { return stdTagFunc(w, tag, m) }) +} + +// Template implements simple template engine, which can be used for fast +// tags' (aka placeholders) substitution. +type Template struct { + template string + startTag string + endTag string + + texts [][]byte + tags []string + byteBufferPool bytebufferpool.Pool +} + +// New parses the given template using the given startTag and endTag +// as tag start and tag end. +// +// The returned template can be executed by concurrently running goroutines +// using Execute* methods. +// +// New panics if the given template cannot be parsed. Use NewTemplate instead +// if template may contain errors. +func New(template, startTag, endTag string) *Template { + t, err := NewTemplate(template, startTag, endTag) + if err != nil { + panic(err) + } + return t +} + +// NewTemplate parses the given template using the given startTag and endTag +// as tag start and tag end. +// +// The returned template can be executed by concurrently running goroutines +// using Execute* methods. +func NewTemplate(template, startTag, endTag string) (*Template, error) { + var t Template + err := t.Reset(template, startTag, endTag) + if err != nil { + return nil, err + } + return &t, nil +} + +// TagFunc can be used as a substitution value in the map passed to Execute*. +// Execute* functions pass tag (placeholder) name in 'tag' argument. +// +// TagFunc must be safe to call from concurrently running goroutines. +// +// TagFunc must write contents to w and return the number of bytes written. +type TagFunc func(w io.Writer, tag string) (int, error) + +// Reset resets the template t to new one defined by +// template, startTag and endTag. +// +// Reset allows Template object re-use. +// +// Reset may be called only if no other goroutines call t methods at the moment. +func (t *Template) Reset(template, startTag, endTag string) error { + // Keep these vars in t, so GC won't collect them and won't break + // vars derived via unsafe* + t.template = template + t.startTag = startTag + t.endTag = endTag + t.texts = t.texts[:0] + t.tags = t.tags[:0] + + if len(startTag) == 0 { + panic("startTag cannot be empty") + } + if len(endTag) == 0 { + panic("endTag cannot be empty") + } + + s := unsafeString2Bytes(template) + a := unsafeString2Bytes(startTag) + b := unsafeString2Bytes(endTag) + + tagsCount := bytes.Count(s, a) + if tagsCount == 0 { + return nil + } + + if tagsCount+1 > cap(t.texts) { + t.texts = make([][]byte, 0, tagsCount+1) + } + if tagsCount > cap(t.tags) { + t.tags = make([]string, 0, tagsCount) + } + + for { + n := bytes.Index(s, a) + if n < 0 { + t.texts = append(t.texts, s) + break + } + t.texts = append(t.texts, s[:n]) + + s = s[n+len(a):] + n = bytes.Index(s, b) + if n < 0 { + return fmt.Errorf("Cannot find end tag=%q in the template=%q starting from %q", endTag, template, s) + } + + t.tags = append(t.tags, unsafeBytes2String(s[:n])) + s = s[n+len(b):] + } + + return nil +} + +// ExecuteFunc calls f on each template tag (placeholder) occurrence. +// +// Returns the number of bytes written to w. +// +// This function is optimized for frozen templates. +// Use ExecuteFunc for constantly changing templates. +func (t *Template) ExecuteFunc(w io.Writer, f TagFunc) (int64, error) { + var nn int64 + + n := len(t.texts) - 1 + if n == -1 { + ni, err := w.Write(unsafeString2Bytes(t.template)) + return int64(ni), err + } + + for i := 0; i < n; i++ { + ni, err := w.Write(t.texts[i]) + nn += int64(ni) + if err != nil { + return nn, err + } + + ni, err = f(w, t.tags[i]) + nn += int64(ni) + if err != nil { + return nn, err + } + } + ni, err := w.Write(t.texts[n]) + nn += int64(ni) + return nn, err +} + +// Execute substitutes template tags (placeholders) with the corresponding +// values from the map m and writes the result to the given writer w. +// +// Substitution map m may contain values with the following types: +// * []byte - the fastest value type +// * string - convenient value type +// * TagFunc - flexible value type +// +// Returns the number of bytes written to w. +func (t *Template) Execute(w io.Writer, m map[string]interface{}) (int64, error) { + return t.ExecuteFunc(w, func(w io.Writer, tag string) (int, error) { return stdTagFunc(w, tag, m) }) +} + +// ExecuteFuncString calls f on each template tag (placeholder) occurrence +// and substitutes it with the data written to TagFunc's w. +// +// Returns the resulting string. +// +// This function is optimized for frozen templates. +// Use ExecuteFuncString for constantly changing templates. +func (t *Template) ExecuteFuncString(f TagFunc) string { + bb := t.byteBufferPool.Get() + if _, err := t.ExecuteFunc(bb, f); err != nil { + panic(fmt.Sprintf("unexpected error: %s", err)) + } + s := string(bb.Bytes()) + bb.Reset() + t.byteBufferPool.Put(bb) + return s +} + +// ExecuteString substitutes template tags (placeholders) with the corresponding +// values from the map m and returns the result. +// +// Substitution map m may contain values with the following types: +// * []byte - the fastest value type +// * string - convenient value type +// * TagFunc - flexible value type +// +// This function is optimized for frozen templates. +// Use ExecuteString for constantly changing templates. +func (t *Template) ExecuteString(m map[string]interface{}) string { + return t.ExecuteFuncString(func(w io.Writer, tag string) (int, error) { return stdTagFunc(w, tag, m) }) +} + +func stdTagFunc(w io.Writer, tag string, m map[string]interface{}) (int, error) { + v := m[tag] + if v == nil { + return 0, nil + } + switch value := v.(type) { + case []byte: + return w.Write(value) + case string: + return w.Write([]byte(value)) + case TagFunc: + return value(w, tag) + default: + panic(fmt.Sprintf("tag=%q contains unexpected value type=%#v. Expected []byte, string or TagFunc", tag, v)) + } +} diff --git a/src/dma/vendor/github.com/valyala/fasttemplate/unsafe.go b/src/dma/vendor/github.com/valyala/fasttemplate/unsafe.go new file mode 100644 index 00000000..0498248f --- /dev/null +++ b/src/dma/vendor/github.com/valyala/fasttemplate/unsafe.go @@ -0,0 +1,22 @@ +// +build !appengine + +package fasttemplate + +import ( + "reflect" + "unsafe" +) + +func unsafeBytes2String(b []byte) string { + return *(*string)(unsafe.Pointer(&b)) +} + +func unsafeString2Bytes(s string) []byte { + sh := (*reflect.StringHeader)(unsafe.Pointer(&s)) + bh := reflect.SliceHeader{ + Data: sh.Data, + Len: sh.Len, + Cap: sh.Len, + } + return *(*[]byte)(unsafe.Pointer(&bh)) +} diff --git a/src/dma/vendor/github.com/valyala/fasttemplate/unsafe_gae.go b/src/dma/vendor/github.com/valyala/fasttemplate/unsafe_gae.go new file mode 100644 index 00000000..cc4ce151 --- /dev/null +++ b/src/dma/vendor/github.com/valyala/fasttemplate/unsafe_gae.go @@ -0,0 +1,11 @@ +// +build appengine + +package fasttemplate + +func unsafeBytes2String(b []byte) string { + return string(b) +} + +func unsafeString2Bytes(s string) []byte { + return []byte(s) +} |