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konrad
2018-06-10 11:11:41 +02:00
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22
vendor/github.com/valyala/fasttemplate/LICENSE generated vendored Normal file
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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.

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vendor/github.com/valyala/fasttemplate/README.md generated vendored Normal file
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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"]
```

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vendor/github.com/valyala/fasttemplate/template.go generated vendored Normal file
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// 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))
}
}

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vendor/github.com/valyala/fasttemplate/unsafe.go generated vendored Normal file
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// +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))
}

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vendor/github.com/valyala/fasttemplate/unsafe_gae.go generated vendored Normal file
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// +build appengine
package fasttemplate
func unsafeBytes2String(b []byte) string {
return string(b)
}
func unsafeString2Bytes(s string) []byte {
return []byte(s)
}