mirror of https://github.com/miguelmota/cointop
Miguel Mota
5 years ago
parent
6405fda0c6
commit
a255d67e03
@ -1,15 +0,0 @@
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ISC License
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Copyright (c) 2012-2016 Dave Collins <dave@davec.name>
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Permission to use, copy, modify, and/or distribute this software for any
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purpose with or without fee is hereby granted, provided that the above
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copyright notice and this permission notice appear in all copies.
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||||
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THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
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MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
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ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
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ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
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OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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@ -1,145 +0,0 @@
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// Copyright (c) 2015-2016 Dave Collins <dave@davec.name>
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//
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// Permission to use, copy, modify, and distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice appear in all copies.
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//
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
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// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
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// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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// NOTE: Due to the following build constraints, this file will only be compiled
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// when the code is not running on Google App Engine, compiled by GopherJS, and
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// "-tags safe" is not added to the go build command line. The "disableunsafe"
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// tag is deprecated and thus should not be used.
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// Go versions prior to 1.4 are disabled because they use a different layout
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// for interfaces which make the implementation of unsafeReflectValue more complex.
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// +build !js,!appengine,!safe,!disableunsafe,go1.4
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package spew
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import (
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"reflect"
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"unsafe"
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)
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const (
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// UnsafeDisabled is a build-time constant which specifies whether or
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// not access to the unsafe package is available.
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UnsafeDisabled = false
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// ptrSize is the size of a pointer on the current arch.
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ptrSize = unsafe.Sizeof((*byte)(nil))
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)
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type flag uintptr
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var (
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// flagRO indicates whether the value field of a reflect.Value
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// is read-only.
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flagRO flag
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// flagAddr indicates whether the address of the reflect.Value's
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// value may be taken.
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flagAddr flag
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)
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// flagKindMask holds the bits that make up the kind
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// part of the flags field. In all the supported versions,
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// it is in the lower 5 bits.
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const flagKindMask = flag(0x1f)
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// Different versions of Go have used different
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// bit layouts for the flags type. This table
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// records the known combinations.
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var okFlags = []struct {
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ro, addr flag
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}{{
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// From Go 1.4 to 1.5
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ro: 1 << 5,
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addr: 1 << 7,
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}, {
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// Up to Go tip.
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ro: 1<<5 | 1<<6,
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addr: 1 << 8,
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}}
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var flagValOffset = func() uintptr {
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field, ok := reflect.TypeOf(reflect.Value{}).FieldByName("flag")
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if !ok {
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panic("reflect.Value has no flag field")
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}
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return field.Offset
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}()
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// flagField returns a pointer to the flag field of a reflect.Value.
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func flagField(v *reflect.Value) *flag {
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return (*flag)(unsafe.Pointer(uintptr(unsafe.Pointer(v)) + flagValOffset))
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}
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// unsafeReflectValue converts the passed reflect.Value into a one that bypasses
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// the typical safety restrictions preventing access to unaddressable and
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// unexported data. It works by digging the raw pointer to the underlying
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// value out of the protected value and generating a new unprotected (unsafe)
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// reflect.Value to it.
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//
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// This allows us to check for implementations of the Stringer and error
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// interfaces to be used for pretty printing ordinarily unaddressable and
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// inaccessible values such as unexported struct fields.
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func unsafeReflectValue(v reflect.Value) reflect.Value {
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if !v.IsValid() || (v.CanInterface() && v.CanAddr()) {
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return v
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}
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flagFieldPtr := flagField(&v)
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*flagFieldPtr &^= flagRO
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*flagFieldPtr |= flagAddr
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return v
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}
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// Sanity checks against future reflect package changes
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// to the type or semantics of the Value.flag field.
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func init() {
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field, ok := reflect.TypeOf(reflect.Value{}).FieldByName("flag")
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if !ok {
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panic("reflect.Value has no flag field")
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}
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if field.Type.Kind() != reflect.TypeOf(flag(0)).Kind() {
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panic("reflect.Value flag field has changed kind")
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}
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type t0 int
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var t struct {
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A t0
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// t0 will have flagEmbedRO set.
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t0
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// a will have flagStickyRO set
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a t0
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}
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vA := reflect.ValueOf(t).FieldByName("A")
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va := reflect.ValueOf(t).FieldByName("a")
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vt0 := reflect.ValueOf(t).FieldByName("t0")
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// Infer flagRO from the difference between the flags
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// for the (otherwise identical) fields in t.
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flagPublic := *flagField(&vA)
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flagWithRO := *flagField(&va) | *flagField(&vt0)
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flagRO = flagPublic ^ flagWithRO
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// Infer flagAddr from the difference between a value
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// taken from a pointer and not.
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vPtrA := reflect.ValueOf(&t).Elem().FieldByName("A")
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flagNoPtr := *flagField(&vA)
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flagPtr := *flagField(&vPtrA)
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flagAddr = flagNoPtr ^ flagPtr
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// Check that the inferred flags tally with one of the known versions.
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for _, f := range okFlags {
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if flagRO == f.ro && flagAddr == f.addr {
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return
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}
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}
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panic("reflect.Value read-only flag has changed semantics")
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}
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@ -1,38 +0,0 @@
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// Copyright (c) 2015-2016 Dave Collins <dave@davec.name>
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//
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// Permission to use, copy, modify, and distribute this software for any
|
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// purpose with or without fee is hereby granted, provided that the above
|
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// copyright notice and this permission notice appear in all copies.
|
||||
//
|
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// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
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// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||||
// ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
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// ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
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// OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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// NOTE: Due to the following build constraints, this file will only be compiled
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// when the code is running on Google App Engine, compiled by GopherJS, or
|
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// "-tags safe" is added to the go build command line. The "disableunsafe"
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// tag is deprecated and thus should not be used.
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// +build js appengine safe disableunsafe !go1.4
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package spew
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import "reflect"
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const (
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// UnsafeDisabled is a build-time constant which specifies whether or
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// not access to the unsafe package is available.
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UnsafeDisabled = true
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)
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// unsafeReflectValue typically converts the passed reflect.Value into a one
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// that bypasses the typical safety restrictions preventing access to
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// unaddressable and unexported data. However, doing this relies on access to
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// the unsafe package. This is a stub version which simply returns the passed
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// reflect.Value when the unsafe package is not available.
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func unsafeReflectValue(v reflect.Value) reflect.Value {
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return v
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}
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@ -1,341 +0,0 @@
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/*
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* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*/
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package spew
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import (
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"bytes"
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"fmt"
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"io"
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"reflect"
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"sort"
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"strconv"
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)
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// Some constants in the form of bytes to avoid string overhead. This mirrors
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// the technique used in the fmt package.
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var (
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panicBytes = []byte("(PANIC=")
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plusBytes = []byte("+")
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iBytes = []byte("i")
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trueBytes = []byte("true")
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falseBytes = []byte("false")
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interfaceBytes = []byte("(interface {})")
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commaNewlineBytes = []byte(",\n")
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newlineBytes = []byte("\n")
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openBraceBytes = []byte("{")
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openBraceNewlineBytes = []byte("{\n")
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closeBraceBytes = []byte("}")
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asteriskBytes = []byte("*")
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colonBytes = []byte(":")
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colonSpaceBytes = []byte(": ")
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openParenBytes = []byte("(")
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closeParenBytes = []byte(")")
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spaceBytes = []byte(" ")
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pointerChainBytes = []byte("->")
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nilAngleBytes = []byte("<nil>")
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maxNewlineBytes = []byte("<max depth reached>\n")
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maxShortBytes = []byte("<max>")
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circularBytes = []byte("<already shown>")
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circularShortBytes = []byte("<shown>")
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invalidAngleBytes = []byte("<invalid>")
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openBracketBytes = []byte("[")
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closeBracketBytes = []byte("]")
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percentBytes = []byte("%")
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precisionBytes = []byte(".")
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openAngleBytes = []byte("<")
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closeAngleBytes = []byte(">")
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openMapBytes = []byte("map[")
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closeMapBytes = []byte("]")
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lenEqualsBytes = []byte("len=")
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capEqualsBytes = []byte("cap=")
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)
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// hexDigits is used to map a decimal value to a hex digit.
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var hexDigits = "0123456789abcdef"
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// catchPanic handles any panics that might occur during the handleMethods
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// calls.
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func catchPanic(w io.Writer, v reflect.Value) {
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if err := recover(); err != nil {
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w.Write(panicBytes)
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fmt.Fprintf(w, "%v", err)
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w.Write(closeParenBytes)
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}
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}
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// handleMethods attempts to call the Error and String methods on the underlying
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// type the passed reflect.Value represents and outputes the result to Writer w.
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//
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// It handles panics in any called methods by catching and displaying the error
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// as the formatted value.
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func handleMethods(cs *ConfigState, w io.Writer, v reflect.Value) (handled bool) {
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// We need an interface to check if the type implements the error or
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// Stringer interface. However, the reflect package won't give us an
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// interface on certain things like unexported struct fields in order
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// to enforce visibility rules. We use unsafe, when it's available,
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// to bypass these restrictions since this package does not mutate the
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// values.
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if !v.CanInterface() {
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if UnsafeDisabled {
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return false
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}
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v = unsafeReflectValue(v)
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}
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// Choose whether or not to do error and Stringer interface lookups against
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// the base type or a pointer to the base type depending on settings.
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// Technically calling one of these methods with a pointer receiver can
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// mutate the value, however, types which choose to satisify an error or
|
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// Stringer interface with a pointer receiver should not be mutating their
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// state inside these interface methods.
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if !cs.DisablePointerMethods && !UnsafeDisabled && !v.CanAddr() {
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v = unsafeReflectValue(v)
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}
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if v.CanAddr() {
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v = v.Addr()
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}
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// Is it an error or Stringer?
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switch iface := v.Interface().(type) {
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case error:
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defer catchPanic(w, v)
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if cs.ContinueOnMethod {
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w.Write(openParenBytes)
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w.Write([]byte(iface.Error()))
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w.Write(closeParenBytes)
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w.Write(spaceBytes)
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return false
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}
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w.Write([]byte(iface.Error()))
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return true
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case fmt.Stringer:
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defer catchPanic(w, v)
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if cs.ContinueOnMethod {
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w.Write(openParenBytes)
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w.Write([]byte(iface.String()))
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w.Write(closeParenBytes)
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w.Write(spaceBytes)
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return false
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}
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w.Write([]byte(iface.String()))
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return true
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}
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return false
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}
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// printBool outputs a boolean value as true or false to Writer w.
|
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func printBool(w io.Writer, val bool) {
|
||||
if val {
|
||||
w.Write(trueBytes)
|
||||
} else {
|
||||
w.Write(falseBytes)
|
||||
}
|
||||
}
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||||
|
||||
// printInt outputs a signed integer value to Writer w.
|
||||
func printInt(w io.Writer, val int64, base int) {
|
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w.Write([]byte(strconv.FormatInt(val, base)))
|
||||
}
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|
||||
// printUint outputs an unsigned integer value to Writer w.
|
||||
func printUint(w io.Writer, val uint64, base int) {
|
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w.Write([]byte(strconv.FormatUint(val, base)))
|
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}
|
||||
|
||||
// printFloat outputs a floating point value using the specified precision,
|
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// which is expected to be 32 or 64bit, to Writer w.
|
||||
func printFloat(w io.Writer, val float64, precision int) {
|
||||
w.Write([]byte(strconv.FormatFloat(val, 'g', -1, precision)))
|
||||
}
|
||||
|
||||
// printComplex outputs a complex value using the specified float precision
|
||||
// for the real and imaginary parts to Writer w.
|
||||
func printComplex(w io.Writer, c complex128, floatPrecision int) {
|
||||
r := real(c)
|
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w.Write(openParenBytes)
|
||||
w.Write([]byte(strconv.FormatFloat(r, 'g', -1, floatPrecision)))
|
||||
i := imag(c)
|
||||
if i >= 0 {
|
||||
w.Write(plusBytes)
|
||||
}
|
||||
w.Write([]byte(strconv.FormatFloat(i, 'g', -1, floatPrecision)))
|
||||
w.Write(iBytes)
|
||||
w.Write(closeParenBytes)
|
||||
}
|
||||
|
||||
// printHexPtr outputs a uintptr formatted as hexadecimal with a leading '0x'
|
||||
// prefix to Writer w.
|
||||
func printHexPtr(w io.Writer, p uintptr) {
|
||||
// Null pointer.
|
||||
num := uint64(p)
|
||||
if num == 0 {
|
||||
w.Write(nilAngleBytes)
|
||||
return
|
||||
}
|
||||
|
||||
// Max uint64 is 16 bytes in hex + 2 bytes for '0x' prefix
|
||||
buf := make([]byte, 18)
|
||||
|
||||
// It's simpler to construct the hex string right to left.
|
||||
base := uint64(16)
|
||||
i := len(buf) - 1
|
||||
for num >= base {
|
||||
buf[i] = hexDigits[num%base]
|
||||
num /= base
|
||||
i--
|
||||
}
|
||||
buf[i] = hexDigits[num]
|
||||
|
||||
// Add '0x' prefix.
|
||||
i--
|
||||
buf[i] = 'x'
|
||||
i--
|
||||
buf[i] = '0'
|
||||
|
||||
// Strip unused leading bytes.
|
||||
buf = buf[i:]
|
||||
w.Write(buf)
|
||||
}
|
||||
|
||||
// valuesSorter implements sort.Interface to allow a slice of reflect.Value
|
||||
// elements to be sorted.
|
||||
type valuesSorter struct {
|
||||
values []reflect.Value
|
||||
strings []string // either nil or same len and values
|
||||
cs *ConfigState
|
||||
}
|
||||
|
||||
// newValuesSorter initializes a valuesSorter instance, which holds a set of
|
||||
// surrogate keys on which the data should be sorted. It uses flags in
|
||||
// ConfigState to decide if and how to populate those surrogate keys.
|
||||
func newValuesSorter(values []reflect.Value, cs *ConfigState) sort.Interface {
|
||||
vs := &valuesSorter{values: values, cs: cs}
|
||||
if canSortSimply(vs.values[0].Kind()) {
|
||||
return vs
|
||||
}
|
||||
if !cs.DisableMethods {
|
||||
vs.strings = make([]string, len(values))
|
||||
for i := range vs.values {
|
||||
b := bytes.Buffer{}
|
||||
if !handleMethods(cs, &b, vs.values[i]) {
|
||||
vs.strings = nil
|
||||
break
|
||||
}
|
||||
vs.strings[i] = b.String()
|
||||
}
|
||||
}
|
||||
if vs.strings == nil && cs.SpewKeys {
|
||||
vs.strings = make([]string, len(values))
|
||||
for i := range vs.values {
|
||||
vs.strings[i] = Sprintf("%#v", vs.values[i].Interface())
|
||||
}
|
||||
}
|
||||
return vs
|
||||
}
|
||||
|
||||
// canSortSimply tests whether a reflect.Kind is a primitive that can be sorted
|
||||
// directly, or whether it should be considered for sorting by surrogate keys
|
||||
// (if the ConfigState allows it).
|
||||
func canSortSimply(kind reflect.Kind) bool {
|
||||
// This switch parallels valueSortLess, except for the default case.
|
||||
switch kind {
|
||||
case reflect.Bool:
|
||||
return true
|
||||
case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
|
||||
return true
|
||||
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
|
||||
return true
|
||||
case reflect.Float32, reflect.Float64:
|
||||
return true
|
||||
case reflect.String:
|
||||
return true
|
||||
case reflect.Uintptr:
|
||||
return true
|
||||
case reflect.Array:
|
||||
return true
|
||||
}
|
||||
return false
|
||||
}
|
||||
|
||||
// Len returns the number of values in the slice. It is part of the
|
||||
// sort.Interface implementation.
|
||||
func (s *valuesSorter) Len() int {
|
||||
return len(s.values)
|
||||
}
|
||||
|
||||
// Swap swaps the values at the passed indices. It is part of the
|
||||
// sort.Interface implementation.
|
||||
func (s *valuesSorter) Swap(i, j int) {
|
||||
s.values[i], s.values[j] = s.values[j], s.values[i]
|
||||
if s.strings != nil {
|
||||
s.strings[i], s.strings[j] = s.strings[j], s.strings[i]
|
||||
}
|
||||
}
|
||||
|
||||
// valueSortLess returns whether the first value should sort before the second
|
||||
// value. It is used by valueSorter.Less as part of the sort.Interface
|
||||
// implementation.
|
||||
func valueSortLess(a, b reflect.Value) bool {
|
||||
switch a.Kind() {
|
||||
case reflect.Bool:
|
||||
return !a.Bool() && b.Bool()
|
||||
case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
|
||||
return a.Int() < b.Int()
|
||||
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
|
||||
return a.Uint() < b.Uint()
|
||||
case reflect.Float32, reflect.Float64:
|
||||
return a.Float() < b.Float()
|
||||
case reflect.String:
|
||||
return a.String() < b.String()
|
||||
case reflect.Uintptr:
|
||||
return a.Uint() < b.Uint()
|
||||
case reflect.Array:
|
||||
// Compare the contents of both arrays.
|
||||
l := a.Len()
|
||||
for i := 0; i < l; i++ {
|
||||
av := a.Index(i)
|
||||
bv := b.Index(i)
|
||||
if av.Interface() == bv.Interface() {
|
||||
continue
|
||||
}
|
||||
return valueSortLess(av, bv)
|
||||
}
|
||||
}
|
||||
return a.String() < b.String()
|
||||
}
|
||||
|
||||
// Less returns whether the value at index i should sort before the
|
||||
// value at index j. It is part of the sort.Interface implementation.
|
||||
func (s *valuesSorter) Less(i, j int) bool {
|
||||
if s.strings == nil {
|
||||
return valueSortLess(s.values[i], s.values[j])
|
||||
}
|
||||
return s.strings[i] < s.strings[j]
|
||||
}
|
||||
|
||||
// sortValues is a sort function that handles both native types and any type that
|
||||
// can be converted to error or Stringer. Other inputs are sorted according to
|
||||
// their Value.String() value to ensure display stability.
|
||||
func sortValues(values []reflect.Value, cs *ConfigState) {
|
||||
if len(values) == 0 {
|
||||
return
|
||||
}
|
||||
sort.Sort(newValuesSorter(values, cs))
|
||||
}
|
||||
@ -1,306 +0,0 @@
|
||||
/*
|
||||
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
|
||||
*
|
||||
* Permission to use, copy, modify, and distribute this software for any
|
||||
* purpose with or without fee is hereby granted, provided that the above
|
||||
* copyright notice and this permission notice appear in all copies.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||||
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
||||
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
||||
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||
*/
|
||||
|
||||
package spew
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"fmt"
|
||||
"io"
|
||||
"os"
|
||||
)
|
||||
|
||||
// ConfigState houses the configuration options used by spew to format and
|
||||
// display values. There is a global instance, Config, that is used to control
|
||||
// all top-level Formatter and Dump functionality. Each ConfigState instance
|
||||
// provides methods equivalent to the top-level functions.
|
||||
//
|
||||
// The zero value for ConfigState provides no indentation. You would typically
|
||||
// want to set it to a space or a tab.
|
||||
//
|
||||
// Alternatively, you can use NewDefaultConfig to get a ConfigState instance
|
||||
// with default settings. See the documentation of NewDefaultConfig for default
|
||||
// values.
|
||||
type ConfigState struct {
|
||||
// Indent specifies the string to use for each indentation level. The
|
||||
// global config instance that all top-level functions use set this to a
|
||||
// single space by default. If you would like more indentation, you might
|
||||
// set this to a tab with "\t" or perhaps two spaces with " ".
|
||||
Indent string
|
||||
|
||||
// MaxDepth controls the maximum number of levels to descend into nested
|
||||
// data structures. The default, 0, means there is no limit.
|
||||
//
|
||||
// NOTE: Circular data structures are properly detected, so it is not
|
||||
// necessary to set this value unless you specifically want to limit deeply
|
||||
// nested data structures.
|
||||
MaxDepth int
|
||||
|
||||
// DisableMethods specifies whether or not error and Stringer interfaces are
|
||||
// invoked for types that implement them.
|
||||
DisableMethods bool
|
||||
|
||||
// DisablePointerMethods specifies whether or not to check for and invoke
|
||||
// error and Stringer interfaces on types which only accept a pointer
|
||||
// receiver when the current type is not a pointer.
|
||||
//
|
||||
// NOTE: This might be an unsafe action since calling one of these methods
|
||||
// with a pointer receiver could technically mutate the value, however,
|
||||
// in practice, types which choose to satisify an error or Stringer
|
||||
// interface with a pointer receiver should not be mutating their state
|
||||
// inside these interface methods. As a result, this option relies on
|
||||
// access to the unsafe package, so it will not have any effect when
|
||||
// running in environments without access to the unsafe package such as
|
||||
// Google App Engine or with the "safe" build tag specified.
|
||||
DisablePointerMethods bool
|
||||
|
||||
// DisablePointerAddresses specifies whether to disable the printing of
|
||||
// pointer addresses. This is useful when diffing data structures in tests.
|
||||
DisablePointerAddresses bool
|
||||
|
||||
// DisableCapacities specifies whether to disable the printing of capacities
|
||||
// for arrays, slices, maps and channels. This is useful when diffing
|
||||
// data structures in tests.
|
||||
DisableCapacities bool
|
||||
|
||||
// ContinueOnMethod specifies whether or not recursion should continue once
|
||||
// a custom error or Stringer interface is invoked. The default, false,
|
||||
// means it will print the results of invoking the custom error or Stringer
|
||||
// interface and return immediately instead of continuing to recurse into
|
||||
// the internals of the data type.
|
||||
//
|
||||
// NOTE: This flag does not have any effect if method invocation is disabled
|
||||
// via the DisableMethods or DisablePointerMethods options.
|
||||
ContinueOnMethod bool
|
||||
|
||||
// SortKeys specifies map keys should be sorted before being printed. Use
|
||||
// this to have a more deterministic, diffable output. Note that only
|
||||
// native types (bool, int, uint, floats, uintptr and string) and types
|
||||
// that support the error or Stringer interfaces (if methods are
|
||||
// enabled) are supported, with other types sorted according to the
|
||||
// reflect.Value.String() output which guarantees display stability.
|
||||
SortKeys bool
|
||||
|
||||
// SpewKeys specifies that, as a last resort attempt, map keys should
|
||||
// be spewed to strings and sorted by those strings. This is only
|
||||
// considered if SortKeys is true.
|
||||
SpewKeys bool
|
||||
}
|
||||
|
||||
// Config is the active configuration of the top-level functions.
|
||||
// The configuration can be changed by modifying the contents of spew.Config.
|
||||
var Config = ConfigState{Indent: " "}
|
||||
|
||||
// Errorf is a wrapper for fmt.Errorf that treats each argument as if it were
|
||||
// passed with a Formatter interface returned by c.NewFormatter. It returns
|
||||
// the formatted string as a value that satisfies error. See NewFormatter
|
||||
// for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Errorf(format, c.NewFormatter(a), c.NewFormatter(b))
|
||||
func (c *ConfigState) Errorf(format string, a ...interface{}) (err error) {
|
||||
return fmt.Errorf(format, c.convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Fprint is a wrapper for fmt.Fprint that treats each argument as if it were
|
||||
// passed with a Formatter interface returned by c.NewFormatter. It returns
|
||||
// the number of bytes written and any write error encountered. See
|
||||
// NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Fprint(w, c.NewFormatter(a), c.NewFormatter(b))
|
||||
func (c *ConfigState) Fprint(w io.Writer, a ...interface{}) (n int, err error) {
|
||||
return fmt.Fprint(w, c.convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Fprintf is a wrapper for fmt.Fprintf that treats each argument as if it were
|
||||
// passed with a Formatter interface returned by c.NewFormatter. It returns
|
||||
// the number of bytes written and any write error encountered. See
|
||||
// NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Fprintf(w, format, c.NewFormatter(a), c.NewFormatter(b))
|
||||
func (c *ConfigState) Fprintf(w io.Writer, format string, a ...interface{}) (n int, err error) {
|
||||
return fmt.Fprintf(w, format, c.convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Fprintln is a wrapper for fmt.Fprintln that treats each argument as if it
|
||||
// passed with a Formatter interface returned by c.NewFormatter. See
|
||||
// NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Fprintln(w, c.NewFormatter(a), c.NewFormatter(b))
|
||||
func (c *ConfigState) Fprintln(w io.Writer, a ...interface{}) (n int, err error) {
|
||||
return fmt.Fprintln(w, c.convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Print is a wrapper for fmt.Print that treats each argument as if it were
|
||||
// passed with a Formatter interface returned by c.NewFormatter. It returns
|
||||
// the number of bytes written and any write error encountered. See
|
||||
// NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Print(c.NewFormatter(a), c.NewFormatter(b))
|
||||
func (c *ConfigState) Print(a ...interface{}) (n int, err error) {
|
||||
return fmt.Print(c.convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Printf is a wrapper for fmt.Printf that treats each argument as if it were
|
||||
// passed with a Formatter interface returned by c.NewFormatter. It returns
|
||||
// the number of bytes written and any write error encountered. See
|
||||
// NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Printf(format, c.NewFormatter(a), c.NewFormatter(b))
|
||||
func (c *ConfigState) Printf(format string, a ...interface{}) (n int, err error) {
|
||||
return fmt.Printf(format, c.convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Println is a wrapper for fmt.Println that treats each argument as if it were
|
||||
// passed with a Formatter interface returned by c.NewFormatter. It returns
|
||||
// the number of bytes written and any write error encountered. See
|
||||
// NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Println(c.NewFormatter(a), c.NewFormatter(b))
|
||||
func (c *ConfigState) Println(a ...interface{}) (n int, err error) {
|
||||
return fmt.Println(c.convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Sprint is a wrapper for fmt.Sprint that treats each argument as if it were
|
||||
// passed with a Formatter interface returned by c.NewFormatter. It returns
|
||||
// the resulting string. See NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Sprint(c.NewFormatter(a), c.NewFormatter(b))
|
||||
func (c *ConfigState) Sprint(a ...interface{}) string {
|
||||
return fmt.Sprint(c.convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Sprintf is a wrapper for fmt.Sprintf that treats each argument as if it were
|
||||
// passed with a Formatter interface returned by c.NewFormatter. It returns
|
||||
// the resulting string. See NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Sprintf(format, c.NewFormatter(a), c.NewFormatter(b))
|
||||
func (c *ConfigState) Sprintf(format string, a ...interface{}) string {
|
||||
return fmt.Sprintf(format, c.convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Sprintln is a wrapper for fmt.Sprintln that treats each argument as if it
|
||||
// were passed with a Formatter interface returned by c.NewFormatter. It
|
||||
// returns the resulting string. See NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Sprintln(c.NewFormatter(a), c.NewFormatter(b))
|
||||
func (c *ConfigState) Sprintln(a ...interface{}) string {
|
||||
return fmt.Sprintln(c.convertArgs(a)...)
|
||||
}
|
||||
|
||||
/*
|
||||
NewFormatter returns a custom formatter that satisfies the fmt.Formatter
|
||||
interface. As a result, it integrates cleanly with standard fmt package
|
||||
printing functions. The formatter is useful for inline printing of smaller data
|
||||
types similar to the standard %v format specifier.
|
||||
|
||||
The custom formatter only responds to the %v (most compact), %+v (adds pointer
|
||||
addresses), %#v (adds types), and %#+v (adds types and pointer addresses) verb
|
||||
combinations. Any other verbs such as %x and %q will be sent to the the
|
||||
standard fmt package for formatting. In addition, the custom formatter ignores
|
||||
the width and precision arguments (however they will still work on the format
|
||||
specifiers not handled by the custom formatter).
|
||||
|
||||
Typically this function shouldn't be called directly. It is much easier to make
|
||||
use of the custom formatter by calling one of the convenience functions such as
|
||||
c.Printf, c.Println, or c.Printf.
|
||||
*/
|
||||
func (c *ConfigState) NewFormatter(v interface{}) fmt.Formatter {
|
||||
return newFormatter(c, v)
|
||||
}
|
||||
|
||||
// Fdump formats and displays the passed arguments to io.Writer w. It formats
|
||||
// exactly the same as Dump.
|
||||
func (c *ConfigState) Fdump(w io.Writer, a ...interface{}) {
|
||||
fdump(c, w, a...)
|
||||
}
|
||||
|
||||
/*
|
||||
Dump displays the passed parameters to standard out with newlines, customizable
|
||||
indentation, and additional debug information such as complete types and all
|
||||
pointer addresses used to indirect to the final value. It provides the
|
||||
following features over the built-in printing facilities provided by the fmt
|
||||
package:
|
||||
|
||||
* Pointers are dereferenced and followed
|
||||
* Circular data structures are detected and handled properly
|
||||
* Custom Stringer/error interfaces are optionally invoked, including
|
||||
on unexported types
|
||||
* Custom types which only implement the Stringer/error interfaces via
|
||||
a pointer receiver are optionally invoked when passing non-pointer
|
||||
variables
|
||||
* Byte arrays and slices are dumped like the hexdump -C command which
|
||||
includes offsets, byte values in hex, and ASCII output
|
||||
|
||||
The configuration options are controlled by modifying the public members
|
||||
of c. See ConfigState for options documentation.
|
||||
|
||||
See Fdump if you would prefer dumping to an arbitrary io.Writer or Sdump to
|
||||
get the formatted result as a string.
|
||||
*/
|
||||
func (c *ConfigState) Dump(a ...interface{}) {
|
||||
fdump(c, os.Stdout, a...)
|
||||
}
|
||||
|
||||
// Sdump returns a string with the passed arguments formatted exactly the same
|
||||
// as Dump.
|
||||
func (c *ConfigState) Sdump(a ...interface{}) string {
|
||||
var buf bytes.Buffer
|
||||
fdump(c, &buf, a...)
|
||||
return buf.String()
|
||||
}
|
||||
|
||||
// convertArgs accepts a slice of arguments and returns a slice of the same
|
||||
// length with each argument converted to a spew Formatter interface using
|
||||
// the ConfigState associated with s.
|
||||
func (c *ConfigState) convertArgs(args []interface{}) (formatters []interface{}) {
|
||||
formatters = make([]interface{}, len(args))
|
||||
for index, arg := range args {
|
||||
formatters[index] = newFormatter(c, arg)
|
||||
}
|
||||
return formatters
|
||||
}
|
||||
|
||||
// NewDefaultConfig returns a ConfigState with the following default settings.
|
||||
//
|
||||
// Indent: " "
|
||||
// MaxDepth: 0
|
||||
// DisableMethods: false
|
||||
// DisablePointerMethods: false
|
||||
// ContinueOnMethod: false
|
||||
// SortKeys: false
|
||||
func NewDefaultConfig() *ConfigState {
|
||||
return &ConfigState{Indent: " "}
|
||||
}
|
||||
@ -1,211 +0,0 @@
|
||||
/*
|
||||
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
|
||||
*
|
||||
* Permission to use, copy, modify, and distribute this software for any
|
||||
* purpose with or without fee is hereby granted, provided that the above
|
||||
* copyright notice and this permission notice appear in all copies.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||||
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
||||
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
||||
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||
*/
|
||||
|
||||
/*
|
||||
Package spew implements a deep pretty printer for Go data structures to aid in
|
||||
debugging.
|
||||
|
||||
A quick overview of the additional features spew provides over the built-in
|
||||
printing facilities for Go data types are as follows:
|
||||
|
||||
* Pointers are dereferenced and followed
|
||||
* Circular data structures are detected and handled properly
|
||||
* Custom Stringer/error interfaces are optionally invoked, including
|
||||
on unexported types
|
||||
* Custom types which only implement the Stringer/error interfaces via
|
||||
a pointer receiver are optionally invoked when passing non-pointer
|
||||
variables
|
||||
* Byte arrays and slices are dumped like the hexdump -C command which
|
||||
includes offsets, byte values in hex, and ASCII output (only when using
|
||||
Dump style)
|
||||
|
||||
There are two different approaches spew allows for dumping Go data structures:
|
||||
|
||||
* Dump style which prints with newlines, customizable indentation,
|
||||
and additional debug information such as types and all pointer addresses
|
||||
used to indirect to the final value
|
||||
* A custom Formatter interface that integrates cleanly with the standard fmt
|
||||
package and replaces %v, %+v, %#v, and %#+v to provide inline printing
|
||||
similar to the default %v while providing the additional functionality
|
||||
outlined above and passing unsupported format verbs such as %x and %q
|
||||
along to fmt
|
||||
|
||||
Quick Start
|
||||
|
||||
This section demonstrates how to quickly get started with spew. See the
|
||||
sections below for further details on formatting and configuration options.
|
||||
|
||||
To dump a variable with full newlines, indentation, type, and pointer
|
||||
information use Dump, Fdump, or Sdump:
|
||||
spew.Dump(myVar1, myVar2, ...)
|
||||
spew.Fdump(someWriter, myVar1, myVar2, ...)
|
||||
str := spew.Sdump(myVar1, myVar2, ...)
|
||||
|
||||
Alternatively, if you would prefer to use format strings with a compacted inline
|
||||
printing style, use the convenience wrappers Printf, Fprintf, etc with
|
||||
%v (most compact), %+v (adds pointer addresses), %#v (adds types), or
|
||||
%#+v (adds types and pointer addresses):
|
||||
spew.Printf("myVar1: %v -- myVar2: %+v", myVar1, myVar2)
|
||||
spew.Printf("myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
|
||||
spew.Fprintf(someWriter, "myVar1: %v -- myVar2: %+v", myVar1, myVar2)
|
||||
spew.Fprintf(someWriter, "myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
|
||||
|
||||
Configuration Options
|
||||
|
||||
Configuration of spew is handled by fields in the ConfigState type. For
|
||||
convenience, all of the top-level functions use a global state available
|
||||
via the spew.Config global.
|
||||
|
||||
It is also possible to create a ConfigState instance that provides methods
|
||||
equivalent to the top-level functions. This allows concurrent configuration
|
||||
options. See the ConfigState documentation for more details.
|
||||
|
||||
The following configuration options are available:
|
||||
* Indent
|
||||
String to use for each indentation level for Dump functions.
|
||||
It is a single space by default. A popular alternative is "\t".
|
||||
|
||||
* MaxDepth
|
||||
Maximum number of levels to descend into nested data structures.
|
||||
There is no limit by default.
|
||||
|
||||
* DisableMethods
|
||||
Disables invocation of error and Stringer interface methods.
|
||||
Method invocation is enabled by default.
|
||||
|
||||
* DisablePointerMethods
|
||||
Disables invocation of error and Stringer interface methods on types
|
||||
which only accept pointer receivers from non-pointer variables.
|
||||
Pointer method invocation is enabled by default.
|
||||
|
||||
* DisablePointerAddresses
|
||||
DisablePointerAddresses specifies whether to disable the printing of
|
||||
pointer addresses. This is useful when diffing data structures in tests.
|
||||
|
||||
* DisableCapacities
|
||||
DisableCapacities specifies whether to disable the printing of
|
||||
capacities for arrays, slices, maps and channels. This is useful when
|
||||
diffing data structures in tests.
|
||||
|
||||
* ContinueOnMethod
|
||||
Enables recursion into types after invoking error and Stringer interface
|
||||
methods. Recursion after method invocation is disabled by default.
|
||||
|
||||
* SortKeys
|
||||
Specifies map keys should be sorted before being printed. Use
|
||||
this to have a more deterministic, diffable output. Note that
|
||||
only native types (bool, int, uint, floats, uintptr and string)
|
||||
and types which implement error or Stringer interfaces are
|
||||
supported with other types sorted according to the
|
||||
reflect.Value.String() output which guarantees display
|
||||
stability. Natural map order is used by default.
|
||||
|
||||
* SpewKeys
|
||||
Specifies that, as a last resort attempt, map keys should be
|
||||
spewed to strings and sorted by those strings. This is only
|
||||
considered if SortKeys is true.
|
||||
|
||||
Dump Usage
|
||||
|
||||
Simply call spew.Dump with a list of variables you want to dump:
|
||||
|
||||
spew.Dump(myVar1, myVar2, ...)
|
||||
|
||||
You may also call spew.Fdump if you would prefer to output to an arbitrary
|
||||
io.Writer. For example, to dump to standard error:
|
||||
|
||||
spew.Fdump(os.Stderr, myVar1, myVar2, ...)
|
||||
|
||||
A third option is to call spew.Sdump to get the formatted output as a string:
|
||||
|
||||
str := spew.Sdump(myVar1, myVar2, ...)
|
||||
|
||||
Sample Dump Output
|
||||
|
||||
See the Dump example for details on the setup of the types and variables being
|
||||
shown here.
|
||||
|
||||
(main.Foo) {
|
||||
unexportedField: (*main.Bar)(0xf84002e210)({
|
||||
flag: (main.Flag) flagTwo,
|
||||
data: (uintptr) <nil>
|
||||
}),
|
||||
ExportedField: (map[interface {}]interface {}) (len=1) {
|
||||
(string) (len=3) "one": (bool) true
|
||||
}
|
||||
}
|
||||
|
||||
Byte (and uint8) arrays and slices are displayed uniquely like the hexdump -C
|
||||
command as shown.
|
||||
([]uint8) (len=32 cap=32) {
|
||||
00000000 11 12 13 14 15 16 17 18 19 1a 1b 1c 1d 1e 1f 20 |............... |
|
||||
00000010 21 22 23 24 25 26 27 28 29 2a 2b 2c 2d 2e 2f 30 |!"#$%&'()*+,-./0|
|
||||
00000020 31 32 |12|
|
||||
}
|
||||
|
||||
Custom Formatter
|
||||
|
||||
Spew provides a custom formatter that implements the fmt.Formatter interface
|
||||
so that it integrates cleanly with standard fmt package printing functions. The
|
||||
formatter is useful for inline printing of smaller data types similar to the
|
||||
standard %v format specifier.
|
||||
|
||||
The custom formatter only responds to the %v (most compact), %+v (adds pointer
|
||||
addresses), %#v (adds types), or %#+v (adds types and pointer addresses) verb
|
||||
combinations. Any other verbs such as %x and %q will be sent to the the
|
||||
standard fmt package for formatting. In addition, the custom formatter ignores
|
||||
the width and precision arguments (however they will still work on the format
|
||||
specifiers not handled by the custom formatter).
|
||||
|
||||
Custom Formatter Usage
|
||||
|
||||
The simplest way to make use of the spew custom formatter is to call one of the
|
||||
convenience functions such as spew.Printf, spew.Println, or spew.Printf. The
|
||||
functions have syntax you are most likely already familiar with:
|
||||
|
||||
spew.Printf("myVar1: %v -- myVar2: %+v", myVar1, myVar2)
|
||||
spew.Printf("myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
|
||||
spew.Println(myVar, myVar2)
|
||||
spew.Fprintf(os.Stderr, "myVar1: %v -- myVar2: %+v", myVar1, myVar2)
|
||||
spew.Fprintf(os.Stderr, "myVar3: %#v -- myVar4: %#+v", myVar3, myVar4)
|
||||
|
||||
See the Index for the full list convenience functions.
|
||||
|
||||
Sample Formatter Output
|
||||
|
||||
Double pointer to a uint8:
|
||||
%v: <**>5
|
||||
%+v: <**>(0xf8400420d0->0xf8400420c8)5
|
||||
%#v: (**uint8)5
|
||||
%#+v: (**uint8)(0xf8400420d0->0xf8400420c8)5
|
||||
|
||||
Pointer to circular struct with a uint8 field and a pointer to itself:
|
||||
%v: <*>{1 <*><shown>}
|
||||
%+v: <*>(0xf84003e260){ui8:1 c:<*>(0xf84003e260)<shown>}
|
||||
%#v: (*main.circular){ui8:(uint8)1 c:(*main.circular)<shown>}
|
||||
%#+v: (*main.circular)(0xf84003e260){ui8:(uint8)1 c:(*main.circular)(0xf84003e260)<shown>}
|
||||
|
||||
See the Printf example for details on the setup of variables being shown
|
||||
here.
|
||||
|
||||
Errors
|
||||
|
||||
Since it is possible for custom Stringer/error interfaces to panic, spew
|
||||
detects them and handles them internally by printing the panic information
|
||||
inline with the output. Since spew is intended to provide deep pretty printing
|
||||
capabilities on structures, it intentionally does not return any errors.
|
||||
*/
|
||||
package spew
|
||||
@ -1,509 +0,0 @@
|
||||
/*
|
||||
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
|
||||
*
|
||||
* Permission to use, copy, modify, and distribute this software for any
|
||||
* purpose with or without fee is hereby granted, provided that the above
|
||||
* copyright notice and this permission notice appear in all copies.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||||
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
||||
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
||||
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||
*/
|
||||
|
||||
package spew
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"encoding/hex"
|
||||
"fmt"
|
||||
"io"
|
||||
"os"
|
||||
"reflect"
|
||||
"regexp"
|
||||
"strconv"
|
||||
"strings"
|
||||
)
|
||||
|
||||
var (
|
||||
// uint8Type is a reflect.Type representing a uint8. It is used to
|
||||
// convert cgo types to uint8 slices for hexdumping.
|
||||
uint8Type = reflect.TypeOf(uint8(0))
|
||||
|
||||
// cCharRE is a regular expression that matches a cgo char.
|
||||
// It is used to detect character arrays to hexdump them.
|
||||
cCharRE = regexp.MustCompile(`^.*\._Ctype_char$`)
|
||||
|
||||
// cUnsignedCharRE is a regular expression that matches a cgo unsigned
|
||||
// char. It is used to detect unsigned character arrays to hexdump
|
||||
// them.
|
||||
cUnsignedCharRE = regexp.MustCompile(`^.*\._Ctype_unsignedchar$`)
|
||||
|
||||
// cUint8tCharRE is a regular expression that matches a cgo uint8_t.
|
||||
// It is used to detect uint8_t arrays to hexdump them.
|
||||
cUint8tCharRE = regexp.MustCompile(`^.*\._Ctype_uint8_t$`)
|
||||
)
|
||||
|
||||
// dumpState contains information about the state of a dump operation.
|
||||
type dumpState struct {
|
||||
w io.Writer
|
||||
depth int
|
||||
pointers map[uintptr]int
|
||||
ignoreNextType bool
|
||||
ignoreNextIndent bool
|
||||
cs *ConfigState
|
||||
}
|
||||
|
||||
// indent performs indentation according to the depth level and cs.Indent
|
||||
// option.
|
||||
func (d *dumpState) indent() {
|
||||
if d.ignoreNextIndent {
|
||||
d.ignoreNextIndent = false
|
||||
return
|
||||
}
|
||||
d.w.Write(bytes.Repeat([]byte(d.cs.Indent), d.depth))
|
||||
}
|
||||
|
||||
// unpackValue returns values inside of non-nil interfaces when possible.
|
||||
// This is useful for data types like structs, arrays, slices, and maps which
|
||||
// can contain varying types packed inside an interface.
|
||||
func (d *dumpState) unpackValue(v reflect.Value) reflect.Value {
|
||||
if v.Kind() == reflect.Interface && !v.IsNil() {
|
||||
v = v.Elem()
|
||||
}
|
||||
return v
|
||||
}
|
||||
|
||||
// dumpPtr handles formatting of pointers by indirecting them as necessary.
|
||||
func (d *dumpState) dumpPtr(v reflect.Value) {
|
||||
// Remove pointers at or below the current depth from map used to detect
|
||||
// circular refs.
|
||||
for k, depth := range d.pointers {
|
||||
if depth >= d.depth {
|
||||
delete(d.pointers, k)
|
||||
}
|
||||
}
|
||||
|
||||
// Keep list of all dereferenced pointers to show later.
|
||||
pointerChain := make([]uintptr, 0)
|
||||
|
||||
// Figure out how many levels of indirection there are by dereferencing
|
||||
// pointers and unpacking interfaces down the chain while detecting circular
|
||||
// references.
|
||||
nilFound := false
|
||||
cycleFound := false
|
||||
indirects := 0
|
||||
ve := v
|
||||
for ve.Kind() == reflect.Ptr {
|
||||
if ve.IsNil() {
|
||||
nilFound = true
|
||||
break
|
||||
}
|
||||
indirects++
|
||||
addr := ve.Pointer()
|
||||
pointerChain = append(pointerChain, addr)
|
||||
if pd, ok := d.pointers[addr]; ok && pd < d.depth {
|
||||
cycleFound = true
|
||||
indirects--
|
||||
break
|
||||
}
|
||||
d.pointers[addr] = d.depth
|
||||
|
||||
ve = ve.Elem()
|
||||
if ve.Kind() == reflect.Interface {
|
||||
if ve.IsNil() {
|
||||
nilFound = true
|
||||
break
|
||||
}
|
||||
ve = ve.Elem()
|
||||
}
|
||||
}
|
||||
|
||||
// Display type information.
|
||||
d.w.Write(openParenBytes)
|
||||
d.w.Write(bytes.Repeat(asteriskBytes, indirects))
|
||||
d.w.Write([]byte(ve.Type().String()))
|
||||
d.w.Write(closeParenBytes)
|
||||
|
||||
// Display pointer information.
|
||||
if !d.cs.DisablePointerAddresses && len(pointerChain) > 0 {
|
||||
d.w.Write(openParenBytes)
|
||||
for i, addr := range pointerChain {
|
||||
if i > 0 {
|
||||
d.w.Write(pointerChainBytes)
|
||||
}
|
||||
printHexPtr(d.w, addr)
|
||||
}
|
||||
d.w.Write(closeParenBytes)
|
||||
}
|
||||
|
||||
// Display dereferenced value.
|
||||
d.w.Write(openParenBytes)
|
||||
switch {
|
||||
case nilFound:
|
||||
d.w.Write(nilAngleBytes)
|
||||
|
||||
case cycleFound:
|
||||
d.w.Write(circularBytes)
|
||||
|
||||
default:
|
||||
d.ignoreNextType = true
|
||||
d.dump(ve)
|
||||
}
|
||||
d.w.Write(closeParenBytes)
|
||||
}
|
||||
|
||||
// dumpSlice handles formatting of arrays and slices. Byte (uint8 under
|
||||
// reflection) arrays and slices are dumped in hexdump -C fashion.
|
||||
func (d *dumpState) dumpSlice(v reflect.Value) {
|
||||
// Determine whether this type should be hex dumped or not. Also,
|
||||
// for types which should be hexdumped, try to use the underlying data
|
||||
// first, then fall back to trying to convert them to a uint8 slice.
|
||||
var buf []uint8
|
||||
doConvert := false
|
||||
doHexDump := false
|
||||
numEntries := v.Len()
|
||||
if numEntries > 0 {
|
||||
vt := v.Index(0).Type()
|
||||
vts := vt.String()
|
||||
switch {
|
||||
// C types that need to be converted.
|
||||
case cCharRE.MatchString(vts):
|
||||
fallthrough
|
||||
case cUnsignedCharRE.MatchString(vts):
|
||||
fallthrough
|
||||
case cUint8tCharRE.MatchString(vts):
|
||||
doConvert = true
|
||||
|
||||
// Try to use existing uint8 slices and fall back to converting
|
||||
// and copying if that fails.
|
||||
case vt.Kind() == reflect.Uint8:
|
||||
// We need an addressable interface to convert the type
|
||||
// to a byte slice. However, the reflect package won't
|
||||
// give us an interface on certain things like
|
||||
// unexported struct fields in order to enforce
|
||||
// visibility rules. We use unsafe, when available, to
|
||||
// bypass these restrictions since this package does not
|
||||
// mutate the values.
|
||||
vs := v
|
||||
if !vs.CanInterface() || !vs.CanAddr() {
|
||||
vs = unsafeReflectValue(vs)
|
||||
}
|
||||
if !UnsafeDisabled {
|
||||
vs = vs.Slice(0, numEntries)
|
||||
|
||||
// Use the existing uint8 slice if it can be
|
||||
// type asserted.
|
||||
iface := vs.Interface()
|
||||
if slice, ok := iface.([]uint8); ok {
|
||||
buf = slice
|
||||
doHexDump = true
|
||||
break
|
||||
}
|
||||
}
|
||||
|
||||
// The underlying data needs to be converted if it can't
|
||||
// be type asserted to a uint8 slice.
|
||||
doConvert = true
|
||||
}
|
||||
|
||||
// Copy and convert the underlying type if needed.
|
||||
if doConvert && vt.ConvertibleTo(uint8Type) {
|
||||
// Convert and copy each element into a uint8 byte
|
||||
// slice.
|
||||
buf = make([]uint8, numEntries)
|
||||
for i := 0; i < numEntries; i++ {
|
||||
vv := v.Index(i)
|
||||
buf[i] = uint8(vv.Convert(uint8Type).Uint())
|
||||
}
|
||||
doHexDump = true
|
||||
}
|
||||
}
|
||||
|
||||
// Hexdump the entire slice as needed.
|
||||
if doHexDump {
|
||||
indent := strings.Repeat(d.cs.Indent, d.depth)
|
||||
str := indent + hex.Dump(buf)
|
||||
str = strings.Replace(str, "\n", "\n"+indent, -1)
|
||||
str = strings.TrimRight(str, d.cs.Indent)
|
||||
d.w.Write([]byte(str))
|
||||
return
|
||||
}
|
||||
|
||||
// Recursively call dump for each item.
|
||||
for i := 0; i < numEntries; i++ {
|
||||
d.dump(d.unpackValue(v.Index(i)))
|
||||
if i < (numEntries - 1) {
|
||||
d.w.Write(commaNewlineBytes)
|
||||
} else {
|
||||
d.w.Write(newlineBytes)
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// dump is the main workhorse for dumping a value. It uses the passed reflect
|
||||
// value to figure out what kind of object we are dealing with and formats it
|
||||
// appropriately. It is a recursive function, however circular data structures
|
||||
// are detected and handled properly.
|
||||
func (d *dumpState) dump(v reflect.Value) {
|
||||
// Handle invalid reflect values immediately.
|
||||
kind := v.Kind()
|
||||
if kind == reflect.Invalid {
|
||||
d.w.Write(invalidAngleBytes)
|
||||
return
|
||||
}
|
||||
|
||||
// Handle pointers specially.
|
||||
if kind == reflect.Ptr {
|
||||
d.indent()
|
||||
d.dumpPtr(v)
|
||||
return
|
||||
}
|
||||
|
||||
// Print type information unless already handled elsewhere.
|
||||
if !d.ignoreNextType {
|
||||
d.indent()
|
||||
d.w.Write(openParenBytes)
|
||||
d.w.Write([]byte(v.Type().String()))
|
||||
d.w.Write(closeParenBytes)
|
||||
d.w.Write(spaceBytes)
|
||||
}
|
||||
d.ignoreNextType = false
|
||||
|
||||
// Display length and capacity if the built-in len and cap functions
|
||||
// work with the value's kind and the len/cap itself is non-zero.
|
||||
valueLen, valueCap := 0, 0
|
||||
switch v.Kind() {
|
||||
case reflect.Array, reflect.Slice, reflect.Chan:
|
||||
valueLen, valueCap = v.Len(), v.Cap()
|
||||
case reflect.Map, reflect.String:
|
||||
valueLen = v.Len()
|
||||
}
|
||||
if valueLen != 0 || !d.cs.DisableCapacities && valueCap != 0 {
|
||||
d.w.Write(openParenBytes)
|
||||
if valueLen != 0 {
|
||||
d.w.Write(lenEqualsBytes)
|
||||
printInt(d.w, int64(valueLen), 10)
|
||||
}
|
||||
if !d.cs.DisableCapacities && valueCap != 0 {
|
||||
if valueLen != 0 {
|
||||
d.w.Write(spaceBytes)
|
||||
}
|
||||
d.w.Write(capEqualsBytes)
|
||||
printInt(d.w, int64(valueCap), 10)
|
||||
}
|
||||
d.w.Write(closeParenBytes)
|
||||
d.w.Write(spaceBytes)
|
||||
}
|
||||
|
||||
// Call Stringer/error interfaces if they exist and the handle methods flag
|
||||
// is enabled
|
||||
if !d.cs.DisableMethods {
|
||||
if (kind != reflect.Invalid) && (kind != reflect.Interface) {
|
||||
if handled := handleMethods(d.cs, d.w, v); handled {
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
switch kind {
|
||||
case reflect.Invalid:
|
||||
// Do nothing. We should never get here since invalid has already
|
||||
// been handled above.
|
||||
|
||||
case reflect.Bool:
|
||||
printBool(d.w, v.Bool())
|
||||
|
||||
case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
|
||||
printInt(d.w, v.Int(), 10)
|
||||
|
||||
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
|
||||
printUint(d.w, v.Uint(), 10)
|
||||
|
||||
case reflect.Float32:
|
||||
printFloat(d.w, v.Float(), 32)
|
||||
|
||||
case reflect.Float64:
|
||||
printFloat(d.w, v.Float(), 64)
|
||||
|
||||
case reflect.Complex64:
|
||||
printComplex(d.w, v.Complex(), 32)
|
||||
|
||||
case reflect.Complex128:
|
||||
printComplex(d.w, v.Complex(), 64)
|
||||
|
||||
case reflect.Slice:
|
||||
if v.IsNil() {
|
||||
d.w.Write(nilAngleBytes)
|
||||
break
|
||||
}
|
||||
fallthrough
|
||||
|
||||
case reflect.Array:
|
||||
d.w.Write(openBraceNewlineBytes)
|
||||
d.depth++
|
||||
if (d.cs.MaxDepth != 0) && (d.depth > d.cs.MaxDepth) {
|
||||
d.indent()
|
||||
d.w.Write(maxNewlineBytes)
|
||||
} else {
|
||||
d.dumpSlice(v)
|
||||
}
|
||||
d.depth--
|
||||
d.indent()
|
||||
d.w.Write(closeBraceBytes)
|
||||
|
||||
case reflect.String:
|
||||
d.w.Write([]byte(strconv.Quote(v.String())))
|
||||
|
||||
case reflect.Interface:
|
||||
// The only time we should get here is for nil interfaces due to
|
||||
// unpackValue calls.
|
||||
if v.IsNil() {
|
||||
d.w.Write(nilAngleBytes)
|
||||
}
|
||||
|
||||
case reflect.Ptr:
|
||||
// Do nothing. We should never get here since pointers have already
|
||||
// been handled above.
|
||||
|
||||
case reflect.Map:
|
||||
// nil maps should be indicated as different than empty maps
|
||||
if v.IsNil() {
|
||||
d.w.Write(nilAngleBytes)
|
||||
break
|
||||
}
|
||||
|
||||
d.w.Write(openBraceNewlineBytes)
|
||||
d.depth++
|
||||
if (d.cs.MaxDepth != 0) && (d.depth > d.cs.MaxDepth) {
|
||||
d.indent()
|
||||
d.w.Write(maxNewlineBytes)
|
||||
} else {
|
||||
numEntries := v.Len()
|
||||
keys := v.MapKeys()
|
||||
if d.cs.SortKeys {
|
||||
sortValues(keys, d.cs)
|
||||
}
|
||||
for i, key := range keys {
|
||||
d.dump(d.unpackValue(key))
|
||||
d.w.Write(colonSpaceBytes)
|
||||
d.ignoreNextIndent = true
|
||||
d.dump(d.unpackValue(v.MapIndex(key)))
|
||||
if i < (numEntries - 1) {
|
||||
d.w.Write(commaNewlineBytes)
|
||||
} else {
|
||||
d.w.Write(newlineBytes)
|
||||
}
|
||||
}
|
||||
}
|
||||
d.depth--
|
||||
d.indent()
|
||||
d.w.Write(closeBraceBytes)
|
||||
|
||||
case reflect.Struct:
|
||||
d.w.Write(openBraceNewlineBytes)
|
||||
d.depth++
|
||||
if (d.cs.MaxDepth != 0) && (d.depth > d.cs.MaxDepth) {
|
||||
d.indent()
|
||||
d.w.Write(maxNewlineBytes)
|
||||
} else {
|
||||
vt := v.Type()
|
||||
numFields := v.NumField()
|
||||
for i := 0; i < numFields; i++ {
|
||||
d.indent()
|
||||
vtf := vt.Field(i)
|
||||
d.w.Write([]byte(vtf.Name))
|
||||
d.w.Write(colonSpaceBytes)
|
||||
d.ignoreNextIndent = true
|
||||
d.dump(d.unpackValue(v.Field(i)))
|
||||
if i < (numFields - 1) {
|
||||
d.w.Write(commaNewlineBytes)
|
||||
} else {
|
||||
d.w.Write(newlineBytes)
|
||||
}
|
||||
}
|
||||
}
|
||||
d.depth--
|
||||
d.indent()
|
||||
d.w.Write(closeBraceBytes)
|
||||
|
||||
case reflect.Uintptr:
|
||||
printHexPtr(d.w, uintptr(v.Uint()))
|
||||
|
||||
case reflect.UnsafePointer, reflect.Chan, reflect.Func:
|
||||
printHexPtr(d.w, v.Pointer())
|
||||
|
||||
// There were not any other types at the time this code was written, but
|
||||
// fall back to letting the default fmt package handle it in case any new
|
||||
// types are added.
|
||||
default:
|
||||
if v.CanInterface() {
|
||||
fmt.Fprintf(d.w, "%v", v.Interface())
|
||||
} else {
|
||||
fmt.Fprintf(d.w, "%v", v.String())
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// fdump is a helper function to consolidate the logic from the various public
|
||||
// methods which take varying writers and config states.
|
||||
func fdump(cs *ConfigState, w io.Writer, a ...interface{}) {
|
||||
for _, arg := range a {
|
||||
if arg == nil {
|
||||
w.Write(interfaceBytes)
|
||||
w.Write(spaceBytes)
|
||||
w.Write(nilAngleBytes)
|
||||
w.Write(newlineBytes)
|
||||
continue
|
||||
}
|
||||
|
||||
d := dumpState{w: w, cs: cs}
|
||||
d.pointers = make(map[uintptr]int)
|
||||
d.dump(reflect.ValueOf(arg))
|
||||
d.w.Write(newlineBytes)
|
||||
}
|
||||
}
|
||||
|
||||
// Fdump formats and displays the passed arguments to io.Writer w. It formats
|
||||
// exactly the same as Dump.
|
||||
func Fdump(w io.Writer, a ...interface{}) {
|
||||
fdump(&Config, w, a...)
|
||||
}
|
||||
|
||||
// Sdump returns a string with the passed arguments formatted exactly the same
|
||||
// as Dump.
|
||||
func Sdump(a ...interface{}) string {
|
||||
var buf bytes.Buffer
|
||||
fdump(&Config, &buf, a...)
|
||||
return buf.String()
|
||||
}
|
||||
|
||||
/*
|
||||
Dump displays the passed parameters to standard out with newlines, customizable
|
||||
indentation, and additional debug information such as complete types and all
|
||||
pointer addresses used to indirect to the final value. It provides the
|
||||
following features over the built-in printing facilities provided by the fmt
|
||||
package:
|
||||
|
||||
* Pointers are dereferenced and followed
|
||||
* Circular data structures are detected and handled properly
|
||||
* Custom Stringer/error interfaces are optionally invoked, including
|
||||
on unexported types
|
||||
* Custom types which only implement the Stringer/error interfaces via
|
||||
a pointer receiver are optionally invoked when passing non-pointer
|
||||
variables
|
||||
* Byte arrays and slices are dumped like the hexdump -C command which
|
||||
includes offsets, byte values in hex, and ASCII output
|
||||
|
||||
The configuration options are controlled by an exported package global,
|
||||
spew.Config. See ConfigState for options documentation.
|
||||
|
||||
See Fdump if you would prefer dumping to an arbitrary io.Writer or Sdump to
|
||||
get the formatted result as a string.
|
||||
*/
|
||||
func Dump(a ...interface{}) {
|
||||
fdump(&Config, os.Stdout, a...)
|
||||
}
|
||||
@ -1,419 +0,0 @@
|
||||
/*
|
||||
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
|
||||
*
|
||||
* Permission to use, copy, modify, and distribute this software for any
|
||||
* purpose with or without fee is hereby granted, provided that the above
|
||||
* copyright notice and this permission notice appear in all copies.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||||
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
||||
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
||||
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||
*/
|
||||
|
||||
package spew
|
||||
|
||||
import (
|
||||
"bytes"
|
||||
"fmt"
|
||||
"reflect"
|
||||
"strconv"
|
||||
"strings"
|
||||
)
|
||||
|
||||
// supportedFlags is a list of all the character flags supported by fmt package.
|
||||
const supportedFlags = "0-+# "
|
||||
|
||||
// formatState implements the fmt.Formatter interface and contains information
|
||||
// about the state of a formatting operation. The NewFormatter function can
|
||||
// be used to get a new Formatter which can be used directly as arguments
|
||||
// in standard fmt package printing calls.
|
||||
type formatState struct {
|
||||
value interface{}
|
||||
fs fmt.State
|
||||
depth int
|
||||
pointers map[uintptr]int
|
||||
ignoreNextType bool
|
||||
cs *ConfigState
|
||||
}
|
||||
|
||||
// buildDefaultFormat recreates the original format string without precision
|
||||
// and width information to pass in to fmt.Sprintf in the case of an
|
||||
// unrecognized type. Unless new types are added to the language, this
|
||||
// function won't ever be called.
|
||||
func (f *formatState) buildDefaultFormat() (format string) {
|
||||
buf := bytes.NewBuffer(percentBytes)
|
||||
|
||||
for _, flag := range supportedFlags {
|
||||
if f.fs.Flag(int(flag)) {
|
||||
buf.WriteRune(flag)
|
||||
}
|
||||
}
|
||||
|
||||
buf.WriteRune('v')
|
||||
|
||||
format = buf.String()
|
||||
return format
|
||||
}
|
||||
|
||||
// constructOrigFormat recreates the original format string including precision
|
||||
// and width information to pass along to the standard fmt package. This allows
|
||||
// automatic deferral of all format strings this package doesn't support.
|
||||
func (f *formatState) constructOrigFormat(verb rune) (format string) {
|
||||
buf := bytes.NewBuffer(percentBytes)
|
||||
|
||||
for _, flag := range supportedFlags {
|
||||
if f.fs.Flag(int(flag)) {
|
||||
buf.WriteRune(flag)
|
||||
}
|
||||
}
|
||||
|
||||
if width, ok := f.fs.Width(); ok {
|
||||
buf.WriteString(strconv.Itoa(width))
|
||||
}
|
||||
|
||||
if precision, ok := f.fs.Precision(); ok {
|
||||
buf.Write(precisionBytes)
|
||||
buf.WriteString(strconv.Itoa(precision))
|
||||
}
|
||||
|
||||
buf.WriteRune(verb)
|
||||
|
||||
format = buf.String()
|
||||
return format
|
||||
}
|
||||
|
||||
// unpackValue returns values inside of non-nil interfaces when possible and
|
||||
// ensures that types for values which have been unpacked from an interface
|
||||
// are displayed when the show types flag is also set.
|
||||
// This is useful for data types like structs, arrays, slices, and maps which
|
||||
// can contain varying types packed inside an interface.
|
||||
func (f *formatState) unpackValue(v reflect.Value) reflect.Value {
|
||||
if v.Kind() == reflect.Interface {
|
||||
f.ignoreNextType = false
|
||||
if !v.IsNil() {
|
||||
v = v.Elem()
|
||||
}
|
||||
}
|
||||
return v
|
||||
}
|
||||
|
||||
// formatPtr handles formatting of pointers by indirecting them as necessary.
|
||||
func (f *formatState) formatPtr(v reflect.Value) {
|
||||
// Display nil if top level pointer is nil.
|
||||
showTypes := f.fs.Flag('#')
|
||||
if v.IsNil() && (!showTypes || f.ignoreNextType) {
|
||||
f.fs.Write(nilAngleBytes)
|
||||
return
|
||||
}
|
||||
|
||||
// Remove pointers at or below the current depth from map used to detect
|
||||
// circular refs.
|
||||
for k, depth := range f.pointers {
|
||||
if depth >= f.depth {
|
||||
delete(f.pointers, k)
|
||||
}
|
||||
}
|
||||
|
||||
// Keep list of all dereferenced pointers to possibly show later.
|
||||
pointerChain := make([]uintptr, 0)
|
||||
|
||||
// Figure out how many levels of indirection there are by derferencing
|
||||
// pointers and unpacking interfaces down the chain while detecting circular
|
||||
// references.
|
||||
nilFound := false
|
||||
cycleFound := false
|
||||
indirects := 0
|
||||
ve := v
|
||||
for ve.Kind() == reflect.Ptr {
|
||||
if ve.IsNil() {
|
||||
nilFound = true
|
||||
break
|
||||
}
|
||||
indirects++
|
||||
addr := ve.Pointer()
|
||||
pointerChain = append(pointerChain, addr)
|
||||
if pd, ok := f.pointers[addr]; ok && pd < f.depth {
|
||||
cycleFound = true
|
||||
indirects--
|
||||
break
|
||||
}
|
||||
f.pointers[addr] = f.depth
|
||||
|
||||
ve = ve.Elem()
|
||||
if ve.Kind() == reflect.Interface {
|
||||
if ve.IsNil() {
|
||||
nilFound = true
|
||||
break
|
||||
}
|
||||
ve = ve.Elem()
|
||||
}
|
||||
}
|
||||
|
||||
// Display type or indirection level depending on flags.
|
||||
if showTypes && !f.ignoreNextType {
|
||||
f.fs.Write(openParenBytes)
|
||||
f.fs.Write(bytes.Repeat(asteriskBytes, indirects))
|
||||
f.fs.Write([]byte(ve.Type().String()))
|
||||
f.fs.Write(closeParenBytes)
|
||||
} else {
|
||||
if nilFound || cycleFound {
|
||||
indirects += strings.Count(ve.Type().String(), "*")
|
||||
}
|
||||
f.fs.Write(openAngleBytes)
|
||||
f.fs.Write([]byte(strings.Repeat("*", indirects)))
|
||||
f.fs.Write(closeAngleBytes)
|
||||
}
|
||||
|
||||
// Display pointer information depending on flags.
|
||||
if f.fs.Flag('+') && (len(pointerChain) > 0) {
|
||||
f.fs.Write(openParenBytes)
|
||||
for i, addr := range pointerChain {
|
||||
if i > 0 {
|
||||
f.fs.Write(pointerChainBytes)
|
||||
}
|
||||
printHexPtr(f.fs, addr)
|
||||
}
|
||||
f.fs.Write(closeParenBytes)
|
||||
}
|
||||
|
||||
// Display dereferenced value.
|
||||
switch {
|
||||
case nilFound:
|
||||
f.fs.Write(nilAngleBytes)
|
||||
|
||||
case cycleFound:
|
||||
f.fs.Write(circularShortBytes)
|
||||
|
||||
default:
|
||||
f.ignoreNextType = true
|
||||
f.format(ve)
|
||||
}
|
||||
}
|
||||
|
||||
// format is the main workhorse for providing the Formatter interface. It
|
||||
// uses the passed reflect value to figure out what kind of object we are
|
||||
// dealing with and formats it appropriately. It is a recursive function,
|
||||
// however circular data structures are detected and handled properly.
|
||||
func (f *formatState) format(v reflect.Value) {
|
||||
// Handle invalid reflect values immediately.
|
||||
kind := v.Kind()
|
||||
if kind == reflect.Invalid {
|
||||
f.fs.Write(invalidAngleBytes)
|
||||
return
|
||||
}
|
||||
|
||||
// Handle pointers specially.
|
||||
if kind == reflect.Ptr {
|
||||
f.formatPtr(v)
|
||||
return
|
||||
}
|
||||
|
||||
// Print type information unless already handled elsewhere.
|
||||
if !f.ignoreNextType && f.fs.Flag('#') {
|
||||
f.fs.Write(openParenBytes)
|
||||
f.fs.Write([]byte(v.Type().String()))
|
||||
f.fs.Write(closeParenBytes)
|
||||
}
|
||||
f.ignoreNextType = false
|
||||
|
||||
// Call Stringer/error interfaces if they exist and the handle methods
|
||||
// flag is enabled.
|
||||
if !f.cs.DisableMethods {
|
||||
if (kind != reflect.Invalid) && (kind != reflect.Interface) {
|
||||
if handled := handleMethods(f.cs, f.fs, v); handled {
|
||||
return
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
switch kind {
|
||||
case reflect.Invalid:
|
||||
// Do nothing. We should never get here since invalid has already
|
||||
// been handled above.
|
||||
|
||||
case reflect.Bool:
|
||||
printBool(f.fs, v.Bool())
|
||||
|
||||
case reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64, reflect.Int:
|
||||
printInt(f.fs, v.Int(), 10)
|
||||
|
||||
case reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uint:
|
||||
printUint(f.fs, v.Uint(), 10)
|
||||
|
||||
case reflect.Float32:
|
||||
printFloat(f.fs, v.Float(), 32)
|
||||
|
||||
case reflect.Float64:
|
||||
printFloat(f.fs, v.Float(), 64)
|
||||
|
||||
case reflect.Complex64:
|
||||
printComplex(f.fs, v.Complex(), 32)
|
||||
|
||||
case reflect.Complex128:
|
||||
printComplex(f.fs, v.Complex(), 64)
|
||||
|
||||
case reflect.Slice:
|
||||
if v.IsNil() {
|
||||
f.fs.Write(nilAngleBytes)
|
||||
break
|
||||
}
|
||||
fallthrough
|
||||
|
||||
case reflect.Array:
|
||||
f.fs.Write(openBracketBytes)
|
||||
f.depth++
|
||||
if (f.cs.MaxDepth != 0) && (f.depth > f.cs.MaxDepth) {
|
||||
f.fs.Write(maxShortBytes)
|
||||
} else {
|
||||
numEntries := v.Len()
|
||||
for i := 0; i < numEntries; i++ {
|
||||
if i > 0 {
|
||||
f.fs.Write(spaceBytes)
|
||||
}
|
||||
f.ignoreNextType = true
|
||||
f.format(f.unpackValue(v.Index(i)))
|
||||
}
|
||||
}
|
||||
f.depth--
|
||||
f.fs.Write(closeBracketBytes)
|
||||
|
||||
case reflect.String:
|
||||
f.fs.Write([]byte(v.String()))
|
||||
|
||||
case reflect.Interface:
|
||||
// The only time we should get here is for nil interfaces due to
|
||||
// unpackValue calls.
|
||||
if v.IsNil() {
|
||||
f.fs.Write(nilAngleBytes)
|
||||
}
|
||||
|
||||
case reflect.Ptr:
|
||||
// Do nothing. We should never get here since pointers have already
|
||||
// been handled above.
|
||||
|
||||
case reflect.Map:
|
||||
// nil maps should be indicated as different than empty maps
|
||||
if v.IsNil() {
|
||||
f.fs.Write(nilAngleBytes)
|
||||
break
|
||||
}
|
||||
|
||||
f.fs.Write(openMapBytes)
|
||||
f.depth++
|
||||
if (f.cs.MaxDepth != 0) && (f.depth > f.cs.MaxDepth) {
|
||||
f.fs.Write(maxShortBytes)
|
||||
} else {
|
||||
keys := v.MapKeys()
|
||||
if f.cs.SortKeys {
|
||||
sortValues(keys, f.cs)
|
||||
}
|
||||
for i, key := range keys {
|
||||
if i > 0 {
|
||||
f.fs.Write(spaceBytes)
|
||||
}
|
||||
f.ignoreNextType = true
|
||||
f.format(f.unpackValue(key))
|
||||
f.fs.Write(colonBytes)
|
||||
f.ignoreNextType = true
|
||||
f.format(f.unpackValue(v.MapIndex(key)))
|
||||
}
|
||||
}
|
||||
f.depth--
|
||||
f.fs.Write(closeMapBytes)
|
||||
|
||||
case reflect.Struct:
|
||||
numFields := v.NumField()
|
||||
f.fs.Write(openBraceBytes)
|
||||
f.depth++
|
||||
if (f.cs.MaxDepth != 0) && (f.depth > f.cs.MaxDepth) {
|
||||
f.fs.Write(maxShortBytes)
|
||||
} else {
|
||||
vt := v.Type()
|
||||
for i := 0; i < numFields; i++ {
|
||||
if i > 0 {
|
||||
f.fs.Write(spaceBytes)
|
||||
}
|
||||
vtf := vt.Field(i)
|
||||
if f.fs.Flag('+') || f.fs.Flag('#') {
|
||||
f.fs.Write([]byte(vtf.Name))
|
||||
f.fs.Write(colonBytes)
|
||||
}
|
||||
f.format(f.unpackValue(v.Field(i)))
|
||||
}
|
||||
}
|
||||
f.depth--
|
||||
f.fs.Write(closeBraceBytes)
|
||||
|
||||
case reflect.Uintptr:
|
||||
printHexPtr(f.fs, uintptr(v.Uint()))
|
||||
|
||||
case reflect.UnsafePointer, reflect.Chan, reflect.Func:
|
||||
printHexPtr(f.fs, v.Pointer())
|
||||
|
||||
// There were not any other types at the time this code was written, but
|
||||
// fall back to letting the default fmt package handle it if any get added.
|
||||
default:
|
||||
format := f.buildDefaultFormat()
|
||||
if v.CanInterface() {
|
||||
fmt.Fprintf(f.fs, format, v.Interface())
|
||||
} else {
|
||||
fmt.Fprintf(f.fs, format, v.String())
|
||||
}
|
||||
}
|
||||
}
|
||||
|
||||
// Format satisfies the fmt.Formatter interface. See NewFormatter for usage
|
||||
// details.
|
||||
func (f *formatState) Format(fs fmt.State, verb rune) {
|
||||
f.fs = fs
|
||||
|
||||
// Use standard formatting for verbs that are not v.
|
||||
if verb != 'v' {
|
||||
format := f.constructOrigFormat(verb)
|
||||
fmt.Fprintf(fs, format, f.value)
|
||||
return
|
||||
}
|
||||
|
||||
if f.value == nil {
|
||||
if fs.Flag('#') {
|
||||
fs.Write(interfaceBytes)
|
||||
}
|
||||
fs.Write(nilAngleBytes)
|
||||
return
|
||||
}
|
||||
|
||||
f.format(reflect.ValueOf(f.value))
|
||||
}
|
||||
|
||||
// newFormatter is a helper function to consolidate the logic from the various
|
||||
// public methods which take varying config states.
|
||||
func newFormatter(cs *ConfigState, v interface{}) fmt.Formatter {
|
||||
fs := &formatState{value: v, cs: cs}
|
||||
fs.pointers = make(map[uintptr]int)
|
||||
return fs
|
||||
}
|
||||
|
||||
/*
|
||||
NewFormatter returns a custom formatter that satisfies the fmt.Formatter
|
||||
interface. As a result, it integrates cleanly with standard fmt package
|
||||
printing functions. The formatter is useful for inline printing of smaller data
|
||||
types similar to the standard %v format specifier.
|
||||
|
||||
The custom formatter only responds to the %v (most compact), %+v (adds pointer
|
||||
addresses), %#v (adds types), or %#+v (adds types and pointer addresses) verb
|
||||
combinations. Any other verbs such as %x and %q will be sent to the the
|
||||
standard fmt package for formatting. In addition, the custom formatter ignores
|
||||
the width and precision arguments (however they will still work on the format
|
||||
specifiers not handled by the custom formatter).
|
||||
|
||||
Typically this function shouldn't be called directly. It is much easier to make
|
||||
use of the custom formatter by calling one of the convenience functions such as
|
||||
Printf, Println, or Fprintf.
|
||||
*/
|
||||
func NewFormatter(v interface{}) fmt.Formatter {
|
||||
return newFormatter(&Config, v)
|
||||
}
|
||||
@ -1,148 +0,0 @@
|
||||
/*
|
||||
* Copyright (c) 2013-2016 Dave Collins <dave@davec.name>
|
||||
*
|
||||
* Permission to use, copy, modify, and distribute this software for any
|
||||
* purpose with or without fee is hereby granted, provided that the above
|
||||
* copyright notice and this permission notice appear in all copies.
|
||||
*
|
||||
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
|
||||
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
|
||||
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
|
||||
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
|
||||
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
|
||||
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
|
||||
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
|
||||
*/
|
||||
|
||||
package spew
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"io"
|
||||
)
|
||||
|
||||
// Errorf is a wrapper for fmt.Errorf that treats each argument as if it were
|
||||
// passed with a default Formatter interface returned by NewFormatter. It
|
||||
// returns the formatted string as a value that satisfies error. See
|
||||
// NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Errorf(format, spew.NewFormatter(a), spew.NewFormatter(b))
|
||||
func Errorf(format string, a ...interface{}) (err error) {
|
||||
return fmt.Errorf(format, convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Fprint is a wrapper for fmt.Fprint that treats each argument as if it were
|
||||
// passed with a default Formatter interface returned by NewFormatter. It
|
||||
// returns the number of bytes written and any write error encountered. See
|
||||
// NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Fprint(w, spew.NewFormatter(a), spew.NewFormatter(b))
|
||||
func Fprint(w io.Writer, a ...interface{}) (n int, err error) {
|
||||
return fmt.Fprint(w, convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Fprintf is a wrapper for fmt.Fprintf that treats each argument as if it were
|
||||
// passed with a default Formatter interface returned by NewFormatter. It
|
||||
// returns the number of bytes written and any write error encountered. See
|
||||
// NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Fprintf(w, format, spew.NewFormatter(a), spew.NewFormatter(b))
|
||||
func Fprintf(w io.Writer, format string, a ...interface{}) (n int, err error) {
|
||||
return fmt.Fprintf(w, format, convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Fprintln is a wrapper for fmt.Fprintln that treats each argument as if it
|
||||
// passed with a default Formatter interface returned by NewFormatter. See
|
||||
// NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Fprintln(w, spew.NewFormatter(a), spew.NewFormatter(b))
|
||||
func Fprintln(w io.Writer, a ...interface{}) (n int, err error) {
|
||||
return fmt.Fprintln(w, convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Print is a wrapper for fmt.Print that treats each argument as if it were
|
||||
// passed with a default Formatter interface returned by NewFormatter. It
|
||||
// returns the number of bytes written and any write error encountered. See
|
||||
// NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Print(spew.NewFormatter(a), spew.NewFormatter(b))
|
||||
func Print(a ...interface{}) (n int, err error) {
|
||||
return fmt.Print(convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Printf is a wrapper for fmt.Printf that treats each argument as if it were
|
||||
// passed with a default Formatter interface returned by NewFormatter. It
|
||||
// returns the number of bytes written and any write error encountered. See
|
||||
// NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Printf(format, spew.NewFormatter(a), spew.NewFormatter(b))
|
||||
func Printf(format string, a ...interface{}) (n int, err error) {
|
||||
return fmt.Printf(format, convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Println is a wrapper for fmt.Println that treats each argument as if it were
|
||||
// passed with a default Formatter interface returned by NewFormatter. It
|
||||
// returns the number of bytes written and any write error encountered. See
|
||||
// NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Println(spew.NewFormatter(a), spew.NewFormatter(b))
|
||||
func Println(a ...interface{}) (n int, err error) {
|
||||
return fmt.Println(convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Sprint is a wrapper for fmt.Sprint that treats each argument as if it were
|
||||
// passed with a default Formatter interface returned by NewFormatter. It
|
||||
// returns the resulting string. See NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Sprint(spew.NewFormatter(a), spew.NewFormatter(b))
|
||||
func Sprint(a ...interface{}) string {
|
||||
return fmt.Sprint(convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Sprintf is a wrapper for fmt.Sprintf that treats each argument as if it were
|
||||
// passed with a default Formatter interface returned by NewFormatter. It
|
||||
// returns the resulting string. See NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Sprintf(format, spew.NewFormatter(a), spew.NewFormatter(b))
|
||||
func Sprintf(format string, a ...interface{}) string {
|
||||
return fmt.Sprintf(format, convertArgs(a)...)
|
||||
}
|
||||
|
||||
// Sprintln is a wrapper for fmt.Sprintln that treats each argument as if it
|
||||
// were passed with a default Formatter interface returned by NewFormatter. It
|
||||
// returns the resulting string. See NewFormatter for formatting details.
|
||||
//
|
||||
// This function is shorthand for the following syntax:
|
||||
//
|
||||
// fmt.Sprintln(spew.NewFormatter(a), spew.NewFormatter(b))
|
||||
func Sprintln(a ...interface{}) string {
|
||||
return fmt.Sprintln(convertArgs(a)...)
|
||||
}
|
||||
|
||||
// convertArgs accepts a slice of arguments and returns a slice of the same
|
||||
// length with each argument converted to a default spew Formatter interface.
|
||||
func convertArgs(args []interface{}) (formatters []interface{}) {
|
||||
formatters = make([]interface{}, len(args))
|
||||
for index, arg := range args {
|
||||
formatters[index] = NewFormatter(arg)
|
||||
}
|
||||
return formatters
|
||||
}
|
||||
@ -0,0 +1,4 @@
|
||||
*.swp
|
||||
examples/examples
|
||||
cmd/xtermcolor/xtermcolor
|
||||
xtermcolor
|
||||
@ -0,0 +1,11 @@
|
||||
language: go
|
||||
|
||||
go:
|
||||
- 1.0
|
||||
- 1.1
|
||||
- 1.2
|
||||
- 1.3
|
||||
- 1.4
|
||||
- 1.5
|
||||
- 1.6
|
||||
- tip
|
||||
@ -0,0 +1,13 @@
|
||||
# Changelog
|
||||
|
||||
## 0.1.1
|
||||
- Adds `xtermcolor` command
|
||||
|
||||
## 0.1.0
|
||||
- Now uses a `color.Palette` and its `.Index` method
|
||||
- Support for convering hex strings (e.g. #CC66FF)
|
||||
|
||||
## 0.0.0
|
||||
- Conversion using map lookup
|
||||
- Conversion from discrete RGB integers
|
||||
- Conversion from single integer
|
||||
@ -0,0 +1,10 @@
|
||||
# Contributing
|
||||
|
||||
* Raise an issue if appropriate
|
||||
* Fork the repo
|
||||
* Bootstrap the dev dependencies (run `./script/bootstrap`)
|
||||
* Make your changes
|
||||
* Use [gofmt](https://golang.org/cmd/gofmt/)
|
||||
* Make sure the tests pass (run `./script/test`)
|
||||
* Make sure the linters pass (run `./script/lint`)
|
||||
* Issue a pull request
|
||||
@ -0,0 +1,21 @@
|
||||
MIT License
|
||||
|
||||
Copyright (c) 2016 Tom Hudson
|
||||
|
||||
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.
|
||||
@ -0,0 +1,70 @@
|
||||
# XtermColor
|
||||
|
||||
Find the closest xterm color to anything implementing [color.Color](https://golang.org/pkg/image/color/#Color).
|
||||
|
||||
Provides a [color.Palette](https://golang.org/pkg/image/color/#Palette) as `xtermcolor.Colors` so you can use `.Convert` and `.Index`,
|
||||
but also provides convenience functions to get the index as a `uint8` from a `color.Color`, a 32 bit integer, or a 24 bit hex string.
|
||||
|
||||
[](https://travis-ci.org/tomnomnom/xtermcolor)
|
||||
|
||||
|
||||
Full documentation can be found on [GoDoc](https://godoc.org/github.com/tomnomnom/xtermcolor).
|
||||
|
||||
Basic usage (examples/basic.go):
|
||||
|
||||
```go
|
||||
package main
|
||||
|
||||
import (
|
||||
"fmt"
|
||||
"image/color"
|
||||
|
||||
"github.com/tomnomnom/xtermcolor"
|
||||
)
|
||||
|
||||
func main() {
|
||||
fmt.Println(xtermcolor.Colors.Convert(color.RGBA{128, 64, 32, 255}))
|
||||
|
||||
fmt.Println(xtermcolor.FromColor(color.RGBA{120, 210, 120, 255}))
|
||||
|
||||
fmt.Println(xtermcolor.FromInt(0xCC66FFFF))
|
||||
|
||||
code, err := xtermcolor.FromHexStr("#FEFEFE")
|
||||
if err != nil {
|
||||
fmt.Println(err)
|
||||
}
|
||||
fmt.Println(code)
|
||||
}
|
||||
```
|
||||
|
||||
```
|
||||
▶ go run examples/basic.go
|
||||
{135 95 0 255}
|
||||
114
|
||||
171
|
||||
15
|
||||
```
|
||||
|
||||
## xtermcolor command
|
||||
|
||||
There's also an `xtermcolor` command you can install by running:
|
||||
|
||||
```
|
||||
▶ go get github.com/tomnomnom/xtermcolor/cmd/xtermcolor
|
||||
```
|
||||
|
||||
Or you can download a binary from the [releases page](https://github.com/tomnomnom/xtermcolor/releases).
|
||||
|
||||
The command returns the color code for a 24 bit hex number:
|
||||
|
||||
```
|
||||
▶ xtermcolor cc66ff
|
||||
171
|
||||
```
|
||||
|
||||
...or for seperate 8 bit red, green and blue components:
|
||||
|
||||
```
|
||||
▶ xtermcolor 210 128 0
|
||||
172
|
||||
```
|
||||
@ -0,0 +1,319 @@
|
||||
// Package xtermcolor provides a palette for xterm colors, and conversion to that palette from anything implementing color.Color
|
||||
package xtermcolor
|
||||
|
||||
import (
|
||||
"errors"
|
||||
"image/color"
|
||||
"strconv"
|
||||
)
|
||||
|
||||
// Colors lists Xterm color codes vs. RGBA; values taken from https://gist.github.com/jasonm23/2868981
|
||||
// color.Palette is really []color.Color and provides .Convert() and .Index()
|
||||
var Colors = color.Palette{
|
||||
// Basic block
|
||||
0: color.RGBA{0x00, 0x00, 0x00, 0xff},
|
||||
1: color.RGBA{0x80, 0x00, 0x00, 0xff},
|
||||
2: color.RGBA{0x00, 0x80, 0x00, 0xff},
|
||||
3: color.RGBA{0x80, 0x80, 0x00, 0xff},
|
||||
4: color.RGBA{0x00, 0x00, 0x80, 0xff},
|
||||
5: color.RGBA{0x80, 0x00, 0x80, 0xff},
|
||||
6: color.RGBA{0x00, 0x80, 0x80, 0xff},
|
||||
7: color.RGBA{0xc0, 0xc0, 0xc0, 0xff},
|
||||
8: color.RGBA{0x80, 0x80, 0x80, 0xff},
|
||||
9: color.RGBA{0xff, 0x00, 0x00, 0xff},
|
||||
10: color.RGBA{0x00, 0xff, 0x00, 0xff},
|
||||
11: color.RGBA{0xff, 0xff, 0x00, 0xff},
|
||||
12: color.RGBA{0x00, 0x00, 0xff, 0xff},
|
||||
13: color.RGBA{0xff, 0x00, 0xff, 0xff},
|
||||
14: color.RGBA{0x00, 0xff, 0xff, 0xff},
|
||||
15: color.RGBA{0xff, 0xff, 0xff, 0xff},
|
||||
|
||||
// 6x6x6 cube block
|
||||
16: color.RGBA{0x00, 0x00, 0x00, 0xff},
|
||||
17: color.RGBA{0x00, 0x00, 0x5f, 0xff},
|
||||
18: color.RGBA{0x00, 0x00, 0x87, 0xff},
|
||||
19: color.RGBA{0x00, 0x00, 0xaf, 0xff},
|
||||
20: color.RGBA{0x00, 0x00, 0xd7, 0xff},
|
||||
21: color.RGBA{0x00, 0x00, 0xff, 0xff},
|
||||
22: color.RGBA{0x00, 0x5f, 0x00, 0xff},
|
||||
23: color.RGBA{0x00, 0x5f, 0x5f, 0xff},
|
||||
24: color.RGBA{0x00, 0x5f, 0x87, 0xff},
|
||||
25: color.RGBA{0x00, 0x5f, 0xaf, 0xff},
|
||||
26: color.RGBA{0x00, 0x5f, 0xd7, 0xff},
|
||||
27: color.RGBA{0x00, 0x5f, 0xff, 0xff},
|
||||
28: color.RGBA{0x00, 0x87, 0x00, 0xff},
|
||||
29: color.RGBA{0x00, 0x87, 0x5f, 0xff},
|
||||
30: color.RGBA{0x00, 0x87, 0x87, 0xff},
|
||||
31: color.RGBA{0x00, 0x87, 0xaf, 0xff},
|
||||
32: color.RGBA{0x00, 0x87, 0xd7, 0xff},
|
||||
33: color.RGBA{0x00, 0x87, 0xff, 0xff},
|
||||
34: color.RGBA{0x00, 0xaf, 0x00, 0xff},
|
||||
35: color.RGBA{0x00, 0xaf, 0x5f, 0xff},
|
||||
36: color.RGBA{0x00, 0xaf, 0x87, 0xff},
|
||||
37: color.RGBA{0x00, 0xaf, 0xaf, 0xff},
|
||||
38: color.RGBA{0x00, 0xaf, 0xd7, 0xff},
|
||||
39: color.RGBA{0x00, 0xaf, 0xff, 0xff},
|
||||
40: color.RGBA{0x00, 0xd7, 0x00, 0xff},
|
||||
41: color.RGBA{0x00, 0xd7, 0x5f, 0xff},
|
||||
42: color.RGBA{0x00, 0xd7, 0x87, 0xff},
|
||||
43: color.RGBA{0x00, 0xd7, 0xaf, 0xff},
|
||||
44: color.RGBA{0x00, 0xd7, 0xd7, 0xff},
|
||||
45: color.RGBA{0x00, 0xd7, 0xff, 0xff},
|
||||
46: color.RGBA{0x00, 0xff, 0x00, 0xff},
|
||||
47: color.RGBA{0x00, 0xff, 0x5f, 0xff},
|
||||
48: color.RGBA{0x00, 0xff, 0x87, 0xff},
|
||||
49: color.RGBA{0x00, 0xff, 0xaf, 0xff},
|
||||
50: color.RGBA{0x00, 0xff, 0xd7, 0xff},
|
||||
51: color.RGBA{0x00, 0xff, 0xff, 0xff},
|
||||
82: color.RGBA{0x5f, 0xff, 0x00, 0xff},
|
||||
83: color.RGBA{0x5f, 0xff, 0x5f, 0xff},
|
||||
84: color.RGBA{0x5f, 0xff, 0x87, 0xff},
|
||||
85: color.RGBA{0x5f, 0xff, 0xaf, 0xff},
|
||||
86: color.RGBA{0x5f, 0xff, 0xd7, 0xff},
|
||||
87: color.RGBA{0x5f, 0xff, 0xff, 0xff},
|
||||
76: color.RGBA{0x5f, 0xd7, 0x00, 0xff},
|
||||
77: color.RGBA{0x5f, 0xd7, 0x5f, 0xff},
|
||||
78: color.RGBA{0x5f, 0xd7, 0x87, 0xff},
|
||||
79: color.RGBA{0x5f, 0xd7, 0xaf, 0xff},
|
||||
80: color.RGBA{0x5f, 0xd7, 0xd7, 0xff},
|
||||
81: color.RGBA{0x5f, 0xd7, 0xff, 0xff},
|
||||
70: color.RGBA{0x5f, 0xaf, 0x00, 0xff},
|
||||
71: color.RGBA{0x5f, 0xaf, 0x5f, 0xff},
|
||||
72: color.RGBA{0x5f, 0xaf, 0x87, 0xff},
|
||||
73: color.RGBA{0x5f, 0xaf, 0xaf, 0xff},
|
||||
74: color.RGBA{0x5f, 0xaf, 0xd7, 0xff},
|
||||
75: color.RGBA{0x5f, 0xaf, 0xff, 0xff},
|
||||
64: color.RGBA{0x5f, 0x87, 0x00, 0xff},
|
||||
65: color.RGBA{0x5f, 0x87, 0x5f, 0xff},
|
||||
66: color.RGBA{0x5f, 0x87, 0x87, 0xff},
|
||||
67: color.RGBA{0x5f, 0x87, 0xaf, 0xff},
|
||||
68: color.RGBA{0x5f, 0x87, 0xd7, 0xff},
|
||||
69: color.RGBA{0x5f, 0x87, 0xff, 0xff},
|
||||
58: color.RGBA{0x5f, 0x5f, 0x00, 0xff},
|
||||
59: color.RGBA{0x5f, 0x5f, 0x5f, 0xff},
|
||||
60: color.RGBA{0x5f, 0x5f, 0x87, 0xff},
|
||||
61: color.RGBA{0x5f, 0x5f, 0xaf, 0xff},
|
||||
62: color.RGBA{0x5f, 0x5f, 0xd7, 0xff},
|
||||
63: color.RGBA{0x5f, 0x5f, 0xff, 0xff},
|
||||
52: color.RGBA{0x5f, 0x00, 0x00, 0xff},
|
||||
53: color.RGBA{0x5f, 0x00, 0x5f, 0xff},
|
||||
54: color.RGBA{0x5f, 0x00, 0x87, 0xff},
|
||||
55: color.RGBA{0x5f, 0x00, 0xaf, 0xff},
|
||||
56: color.RGBA{0x5f, 0x00, 0xd7, 0xff},
|
||||
57: color.RGBA{0x5f, 0x00, 0xff, 0xff},
|
||||
93: color.RGBA{0x87, 0x00, 0xff, 0xff},
|
||||
92: color.RGBA{0x87, 0x00, 0xd7, 0xff},
|
||||
91: color.RGBA{0x87, 0x00, 0xaf, 0xff},
|
||||
90: color.RGBA{0x87, 0x00, 0x87, 0xff},
|
||||
89: color.RGBA{0x87, 0x00, 0x5f, 0xff},
|
||||
88: color.RGBA{0x87, 0x00, 0x00, 0xff},
|
||||
99: color.RGBA{0x87, 0x5f, 0xff, 0xff},
|
||||
98: color.RGBA{0x87, 0x5f, 0xd7, 0xff},
|
||||
97: color.RGBA{0x87, 0x5f, 0xaf, 0xff},
|
||||
96: color.RGBA{0x87, 0x5f, 0x87, 0xff},
|
||||
95: color.RGBA{0x87, 0x5f, 0x5f, 0xff},
|
||||
94: color.RGBA{0x87, 0x5f, 0x00, 0xff},
|
||||
105: color.RGBA{0x87, 0x87, 0xff, 0xff},
|
||||
104: color.RGBA{0x87, 0x87, 0xd7, 0xff},
|
||||
103: color.RGBA{0x87, 0x87, 0xaf, 0xff},
|
||||
102: color.RGBA{0x87, 0x87, 0x87, 0xff},
|
||||
101: color.RGBA{0x87, 0x87, 0x5f, 0xff},
|
||||
100: color.RGBA{0x87, 0x87, 0x00, 0xff},
|
||||
111: color.RGBA{0x87, 0xaf, 0xff, 0xff},
|
||||
110: color.RGBA{0x87, 0xaf, 0xd7, 0xff},
|
||||
109: color.RGBA{0x87, 0xaf, 0xaf, 0xff},
|
||||
108: color.RGBA{0x87, 0xaf, 0x87, 0xff},
|
||||
107: color.RGBA{0x87, 0xaf, 0x5f, 0xff},
|
||||
106: color.RGBA{0x87, 0xaf, 0x00, 0xff},
|
||||
117: color.RGBA{0x87, 0xd7, 0xff, 0xff},
|
||||
116: color.RGBA{0x87, 0xd7, 0xd7, 0xff},
|
||||
115: color.RGBA{0x87, 0xd7, 0xaf, 0xff},
|
||||
114: color.RGBA{0x87, 0xd7, 0x87, 0xff},
|
||||
113: color.RGBA{0x87, 0xd7, 0x5f, 0xff},
|
||||
112: color.RGBA{0x87, 0xd7, 0x00, 0xff},
|
||||
123: color.RGBA{0x87, 0xff, 0xff, 0xff},
|
||||
122: color.RGBA{0x87, 0xff, 0xd7, 0xff},
|
||||
121: color.RGBA{0x87, 0xff, 0xaf, 0xff},
|
||||
120: color.RGBA{0x87, 0xff, 0x87, 0xff},
|
||||
119: color.RGBA{0x87, 0xff, 0x5f, 0xff},
|
||||
118: color.RGBA{0x87, 0xff, 0x00, 0xff},
|
||||
159: color.RGBA{0xaf, 0xff, 0xff, 0xff},
|
||||
158: color.RGBA{0xaf, 0xff, 0xd7, 0xff},
|
||||
157: color.RGBA{0xaf, 0xff, 0xaf, 0xff},
|
||||
156: color.RGBA{0xaf, 0xff, 0x87, 0xff},
|
||||
155: color.RGBA{0xaf, 0xff, 0x5f, 0xff},
|
||||
154: color.RGBA{0xaf, 0xff, 0x00, 0xff},
|
||||
153: color.RGBA{0xaf, 0xd7, 0xff, 0xff},
|
||||
152: color.RGBA{0xaf, 0xd7, 0xd7, 0xff},
|
||||
151: color.RGBA{0xaf, 0xd7, 0xaf, 0xff},
|
||||
150: color.RGBA{0xaf, 0xd7, 0x87, 0xff},
|
||||
149: color.RGBA{0xaf, 0xd7, 0x5f, 0xff},
|
||||
148: color.RGBA{0xaf, 0xd7, 0x00, 0xff},
|
||||
147: color.RGBA{0xaf, 0xaf, 0xff, 0xff},
|
||||
146: color.RGBA{0xaf, 0xaf, 0xd7, 0xff},
|
||||
145: color.RGBA{0xaf, 0xaf, 0xaf, 0xff},
|
||||
144: color.RGBA{0xaf, 0xaf, 0x87, 0xff},
|
||||
143: color.RGBA{0xaf, 0xaf, 0x5f, 0xff},
|
||||
142: color.RGBA{0xaf, 0xaf, 0x00, 0xff},
|
||||
141: color.RGBA{0xaf, 0x87, 0xff, 0xff},
|
||||
140: color.RGBA{0xaf, 0x87, 0xd7, 0xff},
|
||||
139: color.RGBA{0xaf, 0x87, 0xaf, 0xff},
|
||||
138: color.RGBA{0xaf, 0x87, 0x87, 0xff},
|
||||
137: color.RGBA{0xaf, 0x87, 0x5f, 0xff},
|
||||
136: color.RGBA{0xaf, 0x87, 0x00, 0xff},
|
||||
135: color.RGBA{0xaf, 0x5f, 0xff, 0xff},
|
||||
134: color.RGBA{0xaf, 0x5f, 0xd7, 0xff},
|
||||
133: color.RGBA{0xaf, 0x5f, 0xaf, 0xff},
|
||||
132: color.RGBA{0xaf, 0x5f, 0x87, 0xff},
|
||||
131: color.RGBA{0xaf, 0x5f, 0x5f, 0xff},
|
||||
130: color.RGBA{0xaf, 0x5f, 0x00, 0xff},
|
||||
129: color.RGBA{0xaf, 0x00, 0xff, 0xff},
|
||||
128: color.RGBA{0xaf, 0x00, 0xd7, 0xff},
|
||||
127: color.RGBA{0xaf, 0x00, 0xaf, 0xff},
|
||||
126: color.RGBA{0xaf, 0x00, 0x87, 0xff},
|
||||
125: color.RGBA{0xaf, 0x00, 0x5f, 0xff},
|
||||
124: color.RGBA{0xaf, 0x00, 0x00, 0xff},
|
||||
160: color.RGBA{0xd7, 0x00, 0x00, 0xff},
|
||||
161: color.RGBA{0xd7, 0x00, 0x5f, 0xff},
|
||||
162: color.RGBA{0xd7, 0x00, 0x87, 0xff},
|
||||
163: color.RGBA{0xd7, 0x00, 0xaf, 0xff},
|
||||
164: color.RGBA{0xd7, 0x00, 0xd7, 0xff},
|
||||
165: color.RGBA{0xd7, 0x00, 0xff, 0xff},
|
||||
166: color.RGBA{0xd7, 0x5f, 0x00, 0xff},
|
||||
167: color.RGBA{0xd7, 0x5f, 0x5f, 0xff},
|
||||
168: color.RGBA{0xd7, 0x5f, 0x87, 0xff},
|
||||
169: color.RGBA{0xd7, 0x5f, 0xaf, 0xff},
|
||||
170: color.RGBA{0xd7, 0x5f, 0xd7, 0xff},
|
||||
171: color.RGBA{0xd7, 0x5f, 0xff, 0xff},
|
||||
172: color.RGBA{0xd7, 0x87, 0x00, 0xff},
|
||||
173: color.RGBA{0xd7, 0x87, 0x5f, 0xff},
|
||||
174: color.RGBA{0xd7, 0x87, 0x87, 0xff},
|
||||
175: color.RGBA{0xd7, 0x87, 0xaf, 0xff},
|
||||
176: color.RGBA{0xd7, 0x87, 0xd7, 0xff},
|
||||
177: color.RGBA{0xd7, 0x87, 0xff, 0xff},
|
||||
178: color.RGBA{0xdf, 0xaf, 0x00, 0xff},
|
||||
179: color.RGBA{0xdf, 0xaf, 0x5f, 0xff},
|
||||
180: color.RGBA{0xdf, 0xaf, 0x87, 0xff},
|
||||
181: color.RGBA{0xdf, 0xaf, 0xaf, 0xff},
|
||||
182: color.RGBA{0xdf, 0xaf, 0xdf, 0xff},
|
||||
183: color.RGBA{0xdf, 0xaf, 0xff, 0xff},
|
||||
184: color.RGBA{0xdf, 0xdf, 0x00, 0xff},
|
||||
185: color.RGBA{0xdf, 0xdf, 0x5f, 0xff},
|
||||
186: color.RGBA{0xdf, 0xdf, 0x87, 0xff},
|
||||
187: color.RGBA{0xdf, 0xdf, 0xaf, 0xff},
|
||||
188: color.RGBA{0xdf, 0xdf, 0xdf, 0xff},
|
||||
189: color.RGBA{0xdf, 0xdf, 0xff, 0xff},
|
||||
190: color.RGBA{0xdf, 0xff, 0x00, 0xff},
|
||||
191: color.RGBA{0xdf, 0xff, 0x5f, 0xff},
|
||||
192: color.RGBA{0xdf, 0xff, 0x87, 0xff},
|
||||
193: color.RGBA{0xdf, 0xff, 0xaf, 0xff},
|
||||
194: color.RGBA{0xdf, 0xff, 0xdf, 0xff},
|
||||
195: color.RGBA{0xdf, 0xff, 0xff, 0xff},
|
||||
226: color.RGBA{0xff, 0xff, 0x00, 0xff},
|
||||
227: color.RGBA{0xff, 0xff, 0x5f, 0xff},
|
||||
228: color.RGBA{0xff, 0xff, 0x87, 0xff},
|
||||
229: color.RGBA{0xff, 0xff, 0xaf, 0xff},
|
||||
230: color.RGBA{0xff, 0xff, 0xdf, 0xff},
|
||||
231: color.RGBA{0xff, 0xff, 0xff, 0xff},
|
||||
220: color.RGBA{0xff, 0xdf, 0x00, 0xff},
|
||||
221: color.RGBA{0xff, 0xdf, 0x5f, 0xff},
|
||||
222: color.RGBA{0xff, 0xdf, 0x87, 0xff},
|
||||
223: color.RGBA{0xff, 0xdf, 0xaf, 0xff},
|
||||
224: color.RGBA{0xff, 0xdf, 0xdf, 0xff},
|
||||
225: color.RGBA{0xff, 0xdf, 0xff, 0xff},
|
||||
214: color.RGBA{0xff, 0xaf, 0x00, 0xff},
|
||||
215: color.RGBA{0xff, 0xaf, 0x5f, 0xff},
|
||||
216: color.RGBA{0xff, 0xaf, 0x87, 0xff},
|
||||
217: color.RGBA{0xff, 0xaf, 0xaf, 0xff},
|
||||
218: color.RGBA{0xff, 0xaf, 0xdf, 0xff},
|
||||
219: color.RGBA{0xff, 0xaf, 0xff, 0xff},
|
||||
208: color.RGBA{0xff, 0x87, 0x00, 0xff},
|
||||
209: color.RGBA{0xff, 0x87, 0x5f, 0xff},
|
||||
210: color.RGBA{0xff, 0x87, 0x87, 0xff},
|
||||
211: color.RGBA{0xff, 0x87, 0xaf, 0xff},
|
||||
212: color.RGBA{0xff, 0x87, 0xdf, 0xff},
|
||||
213: color.RGBA{0xff, 0x87, 0xff, 0xff},
|
||||
202: color.RGBA{0xff, 0x5f, 0x00, 0xff},
|
||||
203: color.RGBA{0xff, 0x5f, 0x5f, 0xff},
|
||||
204: color.RGBA{0xff, 0x5f, 0x87, 0xff},
|
||||
205: color.RGBA{0xff, 0x5f, 0xaf, 0xff},
|
||||
206: color.RGBA{0xff, 0x5f, 0xdf, 0xff},
|
||||
207: color.RGBA{0xff, 0x5f, 0xff, 0xff},
|
||||
196: color.RGBA{0xff, 0x00, 0x00, 0xff},
|
||||
197: color.RGBA{0xff, 0x00, 0x5f, 0xff},
|
||||
198: color.RGBA{0xff, 0x00, 0x87, 0xff},
|
||||
199: color.RGBA{0xff, 0x00, 0xaf, 0xff},
|
||||
200: color.RGBA{0xff, 0x00, 0xdf, 0xff},
|
||||
201: color.RGBA{0xff, 0x00, 0xff, 0xff},
|
||||
|
||||
// Grayscale block
|
||||
232: color.RGBA{0x08, 0x08, 0x08, 0xff},
|
||||
233: color.RGBA{0x12, 0x12, 0x12, 0xff},
|
||||
234: color.RGBA{0x1c, 0x1c, 0x1c, 0xff},
|
||||
235: color.RGBA{0x26, 0x26, 0x26, 0xff},
|
||||
236: color.RGBA{0x30, 0x30, 0x30, 0xff},
|
||||
237: color.RGBA{0x3a, 0x3a, 0x3a, 0xff},
|
||||
238: color.RGBA{0x44, 0x44, 0x44, 0xff},
|
||||
239: color.RGBA{0x4e, 0x4e, 0x4e, 0xff},
|
||||
240: color.RGBA{0x58, 0x58, 0x58, 0xff},
|
||||
241: color.RGBA{0x62, 0x62, 0x62, 0xff},
|
||||
242: color.RGBA{0x6c, 0x6c, 0x6c, 0xff},
|
||||
243: color.RGBA{0x76, 0x76, 0x76, 0xff},
|
||||
255: color.RGBA{0xee, 0xee, 0xee, 0xff},
|
||||
254: color.RGBA{0xe4, 0xe4, 0xe4, 0xff},
|
||||
253: color.RGBA{0xda, 0xda, 0xda, 0xff},
|
||||
252: color.RGBA{0xd0, 0xd0, 0xd0, 0xff},
|
||||
251: color.RGBA{0xc6, 0xc6, 0xc6, 0xff},
|
||||
250: color.RGBA{0xbc, 0xbc, 0xbc, 0xff},
|
||||
249: color.RGBA{0xb2, 0xb2, 0xb2, 0xff},
|
||||
248: color.RGBA{0xa8, 0xa8, 0xa8, 0xff},
|
||||
247: color.RGBA{0x9e, 0x9e, 0x9e, 0xff},
|
||||
246: color.RGBA{0x94, 0x94, 0x94, 0xff},
|
||||
245: color.RGBA{0x8a, 0x8a, 0x8a, 0xff},
|
||||
244: color.RGBA{0x80, 0x80, 0x80, 0xff},
|
||||
}
|
||||
|
||||
var (
|
||||
// ErrorEmptyHexStr is returned by FromHexStr when an empty hex string is provided
|
||||
ErrorEmptyHexStr = errors.New("Empty hex string provided")
|
||||
|
||||
// ErrorHexParse is returned by FromHexStr when an invalid hex string is provided
|
||||
ErrorHexParse = errors.New("Failed to parse string as hex; try something like #CC66FF")
|
||||
)
|
||||
|
||||
// Convert a 32 bit color to a color.RGBA
|
||||
func intToRGBA(c uint32) color.RGBA {
|
||||
r := uint8((c >> 24) & 0xff)
|
||||
g := uint8((c >> 16) & 0xff)
|
||||
b := uint8((c >> 8) & 0xff)
|
||||
a := uint8(c & 0xff)
|
||||
return color.RGBA{r, g, b, a}
|
||||
}
|
||||
|
||||
// FromColor finds the closest xterm colour to a given color.Color
|
||||
func FromColor(target color.Color) uint8 {
|
||||
|
||||
return uint8(Colors.Index(target))
|
||||
}
|
||||
|
||||
// FromInt finds the closest xterm color to a given 32 bit RGBA color (e.g. 0xff00ff00).
|
||||
func FromInt(target uint32) uint8 {
|
||||
return FromColor(intToRGBA(target))
|
||||
}
|
||||
|
||||
// FromHexStr finds the closest xterm color to a given 24 bit hex string, e.g. "#CC66FF" or "FEFEFE"
|
||||
// It's mostly useful if you're used to specifying colours as hex in CSS etc
|
||||
func FromHexStr(str string) (uint8, error) {
|
||||
if len(str) == 0 {
|
||||
return 0, ErrorEmptyHexStr
|
||||
}
|
||||
|
||||
if str[0] == '#' {
|
||||
str = str[1:]
|
||||
}
|
||||
v, err := strconv.ParseUint(str, 16, 24)
|
||||
if err != nil {
|
||||
return 0, ErrorHexParse
|
||||
}
|
||||
return FromInt(uint32((v << 8) + 0xFF)), nil
|
||||
}
|
||||
Loading…
Reference in New Issue