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service/api: use bitfield for prettyprint flags (#3536)

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Use a bitfield for the internal flags used by the prettyprinting code.
This commit is contained in:
Alessandro Arzilli
2023-10-24 18:35:37 +02:00
committed by GitHub
parent d4104a6bcc
commit b9b553bccd
1 changed files with 56 additions and 36 deletions
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92
service/api/prettyprint.go
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@ -18,35 +18,55 @@ const (
indentString = "\t"
)
type prettyFlags uint8
const (
prettyTop prettyFlags = 1 << iota
prettyNewlines
prettyIncludeType
)
func (flags prettyFlags) top() bool { return flags&prettyTop != 0 }
func (flags prettyFlags) includeType() bool { return flags&prettyIncludeType != 0 }
func (flags prettyFlags) newlines() bool { return flags&prettyNewlines != 0 }
func (flags prettyFlags) set(flag prettyFlags, v bool) prettyFlags {
if v {
return flags | flag
} else {
return flags &^ flag
}
}
// SinglelineString returns a representation of v on a single line.
func (v *Variable) SinglelineString() string {
var buf bytes.Buffer
v.writeTo(&buf, true, false, true, "", "")
v.writeTo(&buf, prettyTop|prettyIncludeType, "", "")
return buf.String()
}
// SinglelineStringFormatted returns a representation of v on a single line, using the format specified by fmtstr.
func (v *Variable) SinglelineStringFormatted(fmtstr string) string {
var buf bytes.Buffer
v.writeTo(&buf, true, false, true, "", fmtstr)
v.writeTo(&buf, prettyTop|prettyIncludeType, "", fmtstr)
return buf.String()
}
// MultilineString returns a representation of v on multiple lines.
func (v *Variable) MultilineString(indent, fmtstr string) string {
var buf bytes.Buffer
v.writeTo(&buf, true, true, true, indent, fmtstr)
v.writeTo(&buf, prettyTop|prettyNewlines|prettyIncludeType, indent, fmtstr)
return buf.String()
}
func (v *Variable) writeTo(buf io.Writer, top, newlines, includeType bool, indent, fmtstr string) {
func (v *Variable) writeTo(buf io.Writer, flags prettyFlags, indent, fmtstr string) {
if v.Unreadable != "" {
fmt.Fprintf(buf, "(unreadable %s)", v.Unreadable)
return
}
if !top && v.Addr == 0 && v.Value == "" {
if includeType && v.Type != "void" {
if !flags.top() && v.Addr == 0 && v.Value == "" {
if flags.includeType() && v.Type != "void" {
fmt.Fprintf(buf, "%s nil", v.Type)
} else {
fmt.Fprint(buf, "nil")
@ -56,21 +76,21 @@ func (v *Variable) writeTo(buf io.Writer, top, newlines, includeType bool, inden
switch v.Kind {
case reflect.Slice:
v.writeSliceTo(buf, newlines, includeType, indent, fmtstr)
v.writeSliceTo(buf, flags, indent, fmtstr)
case reflect.Array:
v.writeArrayTo(buf, newlines, includeType, indent, fmtstr)
v.writeArrayTo(buf, flags, indent, fmtstr)
case reflect.Ptr:
if v.Type == "" || len(v.Children) == 0 {
fmt.Fprint(buf, "nil")
} else if v.Children[0].OnlyAddr && v.Children[0].Addr != 0 {
v.writePointerTo(buf)
} else {
if top && newlines && v.Children[0].Addr != 0 {
if flags.top() && flags.newlines() && v.Children[0].Addr != 0 {
v.writePointerTo(buf)
fmt.Fprint(buf, "\n")
}
fmt.Fprint(buf, "*")
v.Children[0].writeTo(buf, false, newlines, includeType, indent, fmtstr)
v.Children[0].writeTo(buf, flags.set(prettyTop, false), indent, fmtstr)
}
case reflect.UnsafePointer:
if len(v.Children) == 0 {
@ -79,8 +99,8 @@ func (v *Variable) writeTo(buf io.Writer, top, newlines, includeType bool, inden
fmt.Fprintf(buf, "unsafe.Pointer(%#x)", v.Children[0].Addr)
}
case reflect.Chan:
if newlines {
v.writeStructTo(buf, newlines, includeType, indent, fmtstr)
if flags.newlines() {
v.writeStructTo(buf, flags, indent, fmtstr)
} else {
if len(v.Children) == 0 {
fmt.Fprintf(buf, "%s nil", v.Type)
@ -91,9 +111,9 @@ func (v *Variable) writeTo(buf io.Writer, top, newlines, includeType bool, inden
case reflect.Struct:
if v.Value != "" {
fmt.Fprintf(buf, "%s(%s)", v.Type, v.Value)
includeType = false
flags = flags.set(prettyIncludeType, false)
}
v.writeStructTo(buf, newlines, includeType, indent, fmtstr)
v.writeStructTo(buf, flags, indent, fmtstr)
case reflect.Interface:
if v.Addr == 0 {
// an escaped interface variable that points to nil, this shouldn't
@ -101,7 +121,7 @@ func (v *Variable) writeTo(buf io.Writer, top, newlines, includeType bool, inden
fmt.Fprintf(buf, "nil")
return
}
if includeType {
if flags.includeType() {
if v.Children[0].Kind == reflect.Invalid {
fmt.Fprintf(buf, "%s ", v.Type)
if v.Children[0].Addr == 0 {
@ -121,7 +141,7 @@ func (v *Variable) writeTo(buf io.Writer, top, newlines, includeType bool, inden
} else if data.Children[0].OnlyAddr {
fmt.Fprintf(buf, "0x%x", v.Children[0].Addr)
} else {
v.Children[0].writeTo(buf, false, newlines, !includeType, indent, fmtstr)
v.Children[0].writeTo(buf, flags.set(prettyTop, false).set(prettyIncludeType, !flags.includeType()), indent, fmtstr)
}
} else if data.OnlyAddr {
if strings.Contains(v.Type, "/") {
@ -130,10 +150,10 @@ func (v *Variable) writeTo(buf io.Writer, top, newlines, includeType bool, inden
fmt.Fprintf(buf, "*(*%s)(%#x)", v.Type, v.Addr)
}
} else {
v.Children[0].writeTo(buf, false, newlines, !includeType, indent, fmtstr)
v.Children[0].writeTo(buf, flags.set(prettyTop, false).set(prettyIncludeType, !flags.includeType()), indent, fmtstr)
}
case reflect.Map:
v.writeMapTo(buf, newlines, includeType, indent, fmtstr)
v.writeMapTo(buf, flags, indent, fmtstr)
case reflect.Func:
if v.Value == "" {
fmt.Fprint(buf, "nil")
@ -226,25 +246,25 @@ func ExtractIntValue(s string) string {
return s[open+1 : len(s)-1]
}
func (v *Variable) writeSliceTo(buf io.Writer, newlines, includeType bool, indent, fmtstr string) {
if includeType {
func (v *Variable) writeSliceTo(buf io.Writer, flags prettyFlags, indent, fmtstr string) {
if flags.includeType() {
fmt.Fprintf(buf, "%s len: %d, cap: %d, ", v.Type, v.Len, v.Cap)
}
if v.Base == 0 && len(v.Children) == 0 {
fmt.Fprintf(buf, "nil")
return
}
v.writeSliceOrArrayTo(buf, newlines, indent, fmtstr)
v.writeSliceOrArrayTo(buf, flags, indent, fmtstr)
}
func (v *Variable) writeArrayTo(buf io.Writer, newlines, includeType bool, indent, fmtstr string) {
if includeType {
func (v *Variable) writeArrayTo(buf io.Writer, flags prettyFlags, indent, fmtstr string) {
if flags.includeType() {
fmt.Fprintf(buf, "%s ", v.Type)
}
v.writeSliceOrArrayTo(buf, newlines, indent, fmtstr)
v.writeSliceOrArrayTo(buf, flags, indent, fmtstr)
}
func (v *Variable) writeStructTo(buf io.Writer, newlines, includeType bool, indent, fmtstr string) {
func (v *Variable) writeStructTo(buf io.Writer, flags prettyFlags, indent, fmtstr string) {
if int(v.Len) != len(v.Children) && len(v.Children) == 0 {
if strings.Contains(v.Type, "/") {
fmt.Fprintf(buf, "(*%q)(%#x)", v.Type, v.Addr)
@ -254,11 +274,11 @@ func (v *Variable) writeStructTo(buf io.Writer, newlines, includeType bool, inde
return
}
if includeType {
if flags.includeType() {
fmt.Fprintf(buf, "%s ", v.Type)
}
nl := v.shouldNewlineStruct(newlines)
nl := v.shouldNewlineStruct(flags.newlines())
fmt.Fprint(buf, "{")
@ -267,7 +287,7 @@ func (v *Variable) writeStructTo(buf io.Writer, newlines, includeType bool, inde
fmt.Fprintf(buf, "\n%s%s", indent, indentString)
}
fmt.Fprintf(buf, "%s: ", v.Children[i].Name)
v.Children[i].writeTo(buf, false, nl, true, indent+indentString, fmtstr)
v.Children[i].writeTo(buf, prettyIncludeType.set(prettyNewlines, nl), indent+indentString, fmtstr)
if i != len(v.Children)-1 || nl {
fmt.Fprint(buf, ",")
if !nl {
@ -288,8 +308,8 @@ func (v *Variable) writeStructTo(buf io.Writer, newlines, includeType bool, inde
fmt.Fprint(buf, "}")
}
func (v *Variable) writeMapTo(buf io.Writer, newlines, includeType bool, indent, fmtstr string) {
if includeType {
func (v *Variable) writeMapTo(buf io.Writer, flags prettyFlags, indent, fmtstr string) {
if flags.includeType() {
fmt.Fprintf(buf, "%s ", v.Type)
}
if v.Base == 0 && len(v.Children) == 0 {
@ -297,7 +317,7 @@ func (v *Variable) writeMapTo(buf io.Writer, newlines, includeType bool, indent,
return
}
nl := newlines && (len(v.Children) > 0)
nl := flags.newlines() && (len(v.Children) > 0)
fmt.Fprint(buf, "[")
@ -309,9 +329,9 @@ func (v *Variable) writeMapTo(buf io.Writer, newlines, includeType bool, indent,
fmt.Fprintf(buf, "\n%s%s", indent, indentString)
}
key.writeTo(buf, false, false, false, indent+indentString, fmtstr)
key.writeTo(buf, 0, indent+indentString, fmtstr)
fmt.Fprint(buf, ": ")
value.writeTo(buf, false, nl, false, indent+indentString, fmtstr)
value.writeTo(buf, prettyFlags(0).set(prettyNewlines, nl), indent+indentString, fmtstr)
if i != len(v.Children)-1 || nl {
fmt.Fprint(buf, ", ")
}
@ -403,15 +423,15 @@ func (v *Variable) shouldNewlineStruct(newlines bool) bool {
return false
}
func (v *Variable) writeSliceOrArrayTo(buf io.Writer, newlines bool, indent, fmtstr string) {
nl := v.shouldNewlineArray(newlines)
func (v *Variable) writeSliceOrArrayTo(buf io.Writer, flags prettyFlags, indent, fmtstr string) {
nl := v.shouldNewlineArray(flags.newlines())
fmt.Fprint(buf, "[")
for i := range v.Children {
if nl {
fmt.Fprintf(buf, "\n%s%s", indent, indentString)
}
v.Children[i].writeTo(buf, false, nl, false, indent+indentString, fmtstr)
v.Children[i].writeTo(buf, prettyFlags(0).set(prettyNewlines, nl), indent+indentString, fmtstr)
if i != len(v.Children)-1 || nl {
fmt.Fprint(buf, ",")
}