Add config pointers to format and dump states.

This paves the way to support individual configuration options through a
separate type while still providing the simple global config and package
level methods.

spew/common.go

@@ -125,7 +125,7 @@ func catchPanic(w io.Writer, v reflect.Value) {
 //
 // It handles panics in any called methods by catching and displaying the error
 // as the formatted value.
-func handleMethods(w io.Writer, v reflect.Value) (handled bool) {
+func handleMethods(cs *ConfigState, w io.Writer, v reflect.Value) (handled bool) {
 	// We need an interface to check if the type implements the error or
 	// Stringer interface.  However, the reflect package won't give us an
 	// an interface on certain things like unexported struct fields in order
@@ -142,7 +142,7 @@ func handleMethods(w io.Writer, v reflect.Value) (handled bool) {
 	// Stringer interface with a pointer receiver should not be mutating their
 	// state inside these interface methods.
 	var viface interface{}
-	if !Config.DisablePointerMethods {
+	if !cs.DisablePointerMethods {
 		if !v.CanAddr() {
 			v = unsafeReflectValue(v)
 		}

spew/dump.go

@@ -32,16 +32,17 @@ type dumpState struct {
 	pointers       map[uintptr]int
 	ignoreNextType bool
 	ignoreNextPad  bool
+	cs             *ConfigState
 }
 
-// pad performs indentation according to the depth level and Config.Indent
+// pad performs indentation according to the depth level and cs.Indent
 // option.
 func (d *dumpState) pad() {
 	if d.ignoreNextPad {
 		d.ignoreNextPad = false
 		return
 	}
-	d.w.Write(bytes.Repeat([]byte(Config.Indent), d.depth))
+	d.w.Write(bytes.Repeat([]byte(d.cs.Indent), d.depth))
 }
 
 // dumpPtr handles formatting of pointers by indirecting them as necessary.
@@ -146,9 +147,9 @@ func (d *dumpState) dump(v reflect.Value) {
 
 	// Call error/Stringer interfaces if they exist and the handle methods flag
 	// is enabled
-	if !Config.DisableMethods {
+	if !d.cs.DisableMethods {
 		if (kind != reflect.Invalid) && (kind != reflect.Interface) {
-			if handled := handleMethods(d.w, v); handled {
+			if handled := handleMethods(d.cs, d.w, v); handled {
 				return
 			}
 		}
@@ -182,7 +183,7 @@ func (d *dumpState) dump(v reflect.Value) {
 	case reflect.Array, reflect.Slice:
 		d.w.Write(openBraceNewlineBytes)
 		d.depth++
-		if (Config.MaxDepth != 0) && (d.depth > Config.MaxDepth) {
+		if (d.cs.MaxDepth != 0) && (d.depth > d.cs.MaxDepth) {
 			d.pad()
 			d.w.Write(maxNewlineBytes)
 		} else {
@@ -213,7 +214,7 @@ func (d *dumpState) dump(v reflect.Value) {
 	case reflect.Map:
 		d.w.Write(openBraceNewlineBytes)
 		d.depth++
-		if (Config.MaxDepth != 0) && (d.depth > Config.MaxDepth) {
+		if (d.cs.MaxDepth != 0) && (d.depth > d.cs.MaxDepth) {
 			d.pad()
 			d.w.Write(maxNewlineBytes)
 		} else {
@@ -238,7 +239,7 @@ func (d *dumpState) dump(v reflect.Value) {
 	case reflect.Struct:
 		d.w.Write(openBraceNewlineBytes)
 		d.depth++
-		if (Config.MaxDepth != 0) && (d.depth > Config.MaxDepth) {
+		if (d.cs.MaxDepth != 0) && (d.depth > d.cs.MaxDepth) {
 			d.pad()
 			d.w.Write(maxNewlineBytes)
 		} else {
@@ -291,7 +292,7 @@ func Fdump(w io.Writer, a ...interface{}) {
 			continue
 		}
 
-		d := dumpState{w: w}
+		d := dumpState{w: w, cs: &Config}
 		d.pointers = make(map[uintptr]int)
 		d.dump(reflect.ValueOf(arg))
 		d.w.Write(newlineBytes)

spew/format.go

@@ -37,6 +37,7 @@ type formatState struct {
 	depth    int
 	pointers map[uintptr]int // Holds map of points and depth they were seen at
 	fs       fmt.State
+	cs       *ConfigState
 }
 
 // buildDefaultFormat recreates the original format string without precision
@@ -175,9 +176,9 @@ func (f *formatState) format(v reflect.Value) {
 	// Call error/Stringer interfaces if they exist and the handle methods
 	// flag is enabled.
 	kind := v.Kind()
-	if !Config.DisableMethods {
+	if !f.cs.DisableMethods {
 		if (kind != reflect.Invalid) && (kind != reflect.Interface) {
-			if handled := handleMethods(&f.buffer, v); handled {
+			if handled := handleMethods(f.cs, &f.buffer, v); handled {
 				return
 			}
 		}
@@ -211,7 +212,7 @@ func (f *formatState) format(v reflect.Value) {
 	case reflect.Array, reflect.Slice:
 		f.buffer.WriteRune('[')
 		f.depth++
-		if (Config.MaxDepth != 0) && (f.depth > Config.MaxDepth) {
+		if (f.cs.MaxDepth != 0) && (f.depth > f.cs.MaxDepth) {
 			f.buffer.Write(maxShortBytes)
 		} else {
 			numEntries := v.Len()
@@ -234,7 +235,7 @@ func (f *formatState) format(v reflect.Value) {
 	case reflect.Map:
 		f.buffer.Write(openMapBytes)
 		f.depth++
-		if (Config.MaxDepth != 0) && (f.depth > Config.MaxDepth) {
+		if (f.cs.MaxDepth != 0) && (f.depth > f.cs.MaxDepth) {
 			f.buffer.Write(maxShortBytes)
 		} else {
 			keys := v.MapKeys()
@@ -257,7 +258,7 @@ func (f *formatState) format(v reflect.Value) {
 		numFields := v.NumField()
 		f.buffer.WriteRune('{')
 		f.depth++
-		if (Config.MaxDepth != 0) && (f.depth > Config.MaxDepth) {
+		if (f.cs.MaxDepth != 0) && (f.depth > f.cs.MaxDepth) {
 			f.buffer.Write(maxShortBytes)
 		} else {
 			vt := v.Type()
@@ -331,8 +332,8 @@ 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 Printf.
 */
-func NewFormatter(v interface{}) (f fmt.Formatter) {
+func NewFormatter(v interface{}) fmt.Formatter {
-	fs := &formatState{value: v}
+	fs := &formatState{value: v, cs: &Config}
 	fs.pointers = make(map[uintptr]int)
 	return fs
 }