org.mvel2.asm.util

Class Textifier

java.lang.Object

org.mvel2.asm.util.Printer

org.mvel2.asm.util.Textifier

public class Textifier
extends Printer

A Printer that prints a disassembled view of the classes it visits.

Author:

Eric Bruneton

Field Summary

Fields

Modifier and Type	Field and Description
static int	CLASS_DECLARATION Constant used in appendDescriptor for class signatures, formatted in default Java notation (non-bytecode)
static int	CLASS_SIGNATURE Constant used in appendDescriptor for class signatures, formatted in bytecode notation
static int	FIELD_DESCRIPTOR Constant used in appendDescriptor for field descriptors, formatted in bytecode notation
static int	FIELD_SIGNATURE Constant used in appendDescriptor for field signatures, formatted in bytecode notation
static int	HANDLE_DESCRIPTOR Constant used in appendDescriptor for handle descriptors, formatted in bytecode notation
static int	INTERNAL_NAME Constant used in appendDescriptor for internal type names in bytecode notation.
protected Map<Label,String>	labelNames The label names.
protected String	ltab Tab for labels.
static int	METHOD_DESCRIPTOR Constant used in appendDescriptor for method descriptors, formatted in bytecode notation
static int	METHOD_SIGNATURE Constant used in appendDescriptor for method signatures, formatted in bytecode notation
static int	PARAMETERS_DECLARATION Constant used in appendDescriptor for method parameter signatures, formatted in default Java notation (non-bytecode)
protected String	tab Tab for class members.
protected String	tab2 Tab for bytecode instructions.
protected String	tab3 Tab for table and lookup switch instructions.
static int	TYPE_DECLARATION Constant used in appendDescriptor for field or method return value signatures, formatted in default Java notation (non-bytecode)

Fields inherited from class org.mvel2.asm.util.Printer

api, buf, HANDLE_TAG, OPCODES, text, TYPES

Constructor Summary

Constructors

Modifier	Constructor and Description
	Textifier() Constructs a new Textifier.
protected	Textifier(int api) Constructs a new Textifier.

Method Summary

Methods

Modifier and Type	Method and Description
protected void	appendDescriptor(int type, String desc) Appends an internal name, a type descriptor or a type signature to buf.
protected void	appendHandle(Handle h) Appends the information about the given handle to buf.
protected void	appendLabel(Label l) Appends the name of the given label to buf.
protected Textifier	createTextifier() Creates a new TraceVisitor instance.
static void	main(String[] args) Prints a disassembled view of the given class to the standard output.
void	visit(int version, int access, String name, String signature, String superName, String[] interfaces) Class header.
void	visit(String name, Object value) Annotation value.
Textifier	visitAnnotation(String desc, boolean visible) Prints a disassembled view of the given annotation.
Textifier	visitAnnotation(String name, String desc) Nested annotation value.
Textifier	visitAnnotationDefault() Method default annotation.
void	visitAnnotationEnd() Annotation end.
Textifier	visitArray(String name) Annotation array value.
void	visitAttribute(Attribute attr) Prints a disassembled view of the given attribute.
Textifier	visitClassAnnotation(String desc, boolean visible) Class annotation.
void	visitClassAttribute(Attribute attr) Class attribute.
void	visitClassEnd() Class end.
Printer	visitClassTypeAnnotation(int typeRef, TypePath typePath, String desc, boolean visible) Class type annotation.
void	visitCode() Method start.
void	visitEnum(String name, String desc, String value) Annotation enum value.
Textifier	visitField(int access, String name, String desc, String signature, Object value) Class field.
Textifier	visitFieldAnnotation(String desc, boolean visible) Field annotation.
void	visitFieldAttribute(Attribute attr) Field attribute.
void	visitFieldEnd() Field end.
void	visitFieldInsn(int opcode, String owner, String name, String desc) Method instruction.
Printer	visitFieldTypeAnnotation(int typeRef, TypePath typePath, String desc, boolean visible) Field type annotation.
void	visitFrame(int type, int nLocal, Object[] local, int nStack, Object[] stack) Method stack frame.
void	visitIincInsn(int var, int increment) Method instruction.
void	visitInnerClass(String name, String outerName, String innerName, int access) Class inner name.
void	visitInsn(int opcode) Method instruction.
Printer	visitInsnAnnotation(int typeRef, TypePath typePath, String desc, boolean visible) Instruction type annotation.
void	visitIntInsn(int opcode, int operand) Method instruction.
void	visitInvokeDynamicInsn(String name, String desc, Handle bsm, Object... bsmArgs) Method instruction.
void	visitJumpInsn(int opcode, Label label) Method instruction.
void	visitLabel(Label label) Method label.
void	visitLdcInsn(Object cst) Method instruction.
void	visitLineNumber(int line, Label start) Method debug info.
void	visitLocalVariable(String name, String desc, String signature, Label start, Label end, int index) Method debug info.
Printer	visitLocalVariableAnnotation(int typeRef, TypePath typePath, Label[] start, Label[] end, int[] index, String desc, boolean visible) Local variable type annotation.
void	visitLookupSwitchInsn(Label dflt, int[] keys, Label[] labels) Method instruction.
void	visitMaxs(int maxStack, int maxLocals) Method max stack and max locals.
Textifier	visitMethod(int access, String name, String desc, String signature, String[] exceptions) Class method.
Textifier	visitMethodAnnotation(String desc, boolean visible) Method annotation.
void	visitMethodAttribute(Attribute attr) Method attribute.
void	visitMethodEnd() Method end.
void	visitMethodInsn(int opcode, String owner, String name, String desc) Deprecated.
void	visitMethodInsn(int opcode, String owner, String name, String desc, boolean itf) Method instruction.
Printer	visitMethodTypeAnnotation(int typeRef, TypePath typePath, String desc, boolean visible) Method type annotation.
void	visitMultiANewArrayInsn(String desc, int dims) Method instruction.
void	visitOuterClass(String owner, String name, String desc) Class outer class.
void	visitParameter(String name, int access) Method parameter.
Textifier	visitParameterAnnotation(int parameter, String desc, boolean visible) Method parameter annotation.
void	visitSource(String file, String debug) Class source.
void	visitTableSwitchInsn(int min, int max, Label dflt, Label... labels) Method instruction.
Printer	visitTryCatchAnnotation(int typeRef, TypePath typePath, String desc, boolean visible) Try catch block type annotation.
void	visitTryCatchBlock(Label start, Label end, Label handler, String type) Method exception handler.
Textifier	visitTypeAnnotation(int typeRef, TypePath typePath, String desc, boolean visible) Prints a disassembled view of the given type annotation.
void	visitTypeInsn(int opcode, String type) Method instruction.
void	visitVarInsn(int opcode, int var) Method instruction.

Methods inherited from class org.mvel2.asm.util.Printer

appendString, getText, print

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Field Detail

INTERNAL_NAME

public static final int INTERNAL_NAME

Constant used in appendDescriptor for internal type names in bytecode notation.

See Also:

Constant Field Values

FIELD_DESCRIPTOR

public static final int FIELD_DESCRIPTOR

Constant used in appendDescriptor for field descriptors, formatted in bytecode notation

See Also:

Constant Field Values

FIELD_SIGNATURE

public static final int FIELD_SIGNATURE

Constant used in appendDescriptor for field signatures, formatted in bytecode notation

See Also:

Constant Field Values

METHOD_DESCRIPTOR

public static final int METHOD_DESCRIPTOR

Constant used in appendDescriptor for method descriptors, formatted in bytecode notation

See Also:

Constant Field Values

METHOD_SIGNATURE

public static final int METHOD_SIGNATURE

Constant used in appendDescriptor for method signatures, formatted in bytecode notation

See Also:

Constant Field Values

CLASS_SIGNATURE

public static final int CLASS_SIGNATURE

Constant used in appendDescriptor for class signatures, formatted in bytecode notation

See Also:

Constant Field Values

TYPE_DECLARATION

public static final int TYPE_DECLARATION

Constant used in appendDescriptor for field or method return value signatures, formatted in default Java notation (non-bytecode)

See Also:

Constant Field Values

CLASS_DECLARATION

public static final int CLASS_DECLARATION

Constant used in appendDescriptor for class signatures, formatted in default Java notation (non-bytecode)

See Also:

Constant Field Values

PARAMETERS_DECLARATION

public static final int PARAMETERS_DECLARATION

Constant used in appendDescriptor for method parameter signatures, formatted in default Java notation (non-bytecode)

See Also:

Constant Field Values

HANDLE_DESCRIPTOR

public static final int HANDLE_DESCRIPTOR

Constant used in appendDescriptor for handle descriptors, formatted in bytecode notation

See Also:

Constant Field Values

tab

protected String tab

Tab for class members.

tab2

protected String tab2

Tab for bytecode instructions.

tab3

protected String tab3

Tab for table and lookup switch instructions.

ltab

protected String ltab

Tab for labels.

labelNames

protected Map<Label,String> labelNames

The label names. This map associate String values to Label keys.

Constructor Detail

Textifier

public Textifier()

Constructs a new Textifier. Subclasses must not use this constructor. Instead, they must use the Textifier(int) version.

Throws:

IllegalStateException - If a subclass calls this constructor.

Textifier

protected Textifier(int api)

Constructs a new Textifier.

Parameters:

api - the ASM API version implemented by this visitor. Must be one of Opcodes.ASM4 or Opcodes.ASM5.

Method Detail

main

public static void main(String[] args)
                 throws Exception

Prints a disassembled view of the given class to the standard output.

Usage: Textifier [-debug] <binary class name or class file name >

Parameters:

args - the command line arguments.

Throws:

Exception - if the class cannot be found, or if an IO exception occurs.

visit

public void visit(int version,
         int access,
         String name,
         String signature,
         String superName,
         String[] interfaces)

Description copied from class: Printer

Class header. See ClassVisitor.visit(int, int, java.lang.String, java.lang.String, java.lang.String, java.lang.String[]).

Specified by:

visit in class Printer

visitSource

public void visitSource(String file,
               String debug)

Description copied from class: Printer

Class source. See ClassVisitor.visitSource(java.lang.String, java.lang.String).

Specified by:

visitSource in class Printer

visitOuterClass

public void visitOuterClass(String owner,
                   String name,
                   String desc)

Description copied from class: Printer

Class outer class. See ClassVisitor.visitOuterClass(java.lang.String, java.lang.String, java.lang.String).

Specified by:

visitOuterClass in class Printer

visitClassAnnotation

public Textifier visitClassAnnotation(String desc,
                             boolean visible)

Description copied from class: Printer

Class annotation. See ClassVisitor.visitAnnotation(java.lang.String, boolean).

Specified by:

visitClassAnnotation in class Printer

visitClassTypeAnnotation

public Printer visitClassTypeAnnotation(int typeRef,
                               TypePath typePath,
                               String desc,
                               boolean visible)

Description copied from class: Printer

Class type annotation. See ClassVisitor.visitTypeAnnotation(int, org.mvel2.asm.TypePath, java.lang.String, boolean).

Overrides:

visitClassTypeAnnotation in class Printer

visitClassAttribute

public void visitClassAttribute(Attribute attr)

Description copied from class: Printer

Class attribute. See ClassVisitor.visitAttribute(org.mvel2.asm.Attribute).

Specified by:

visitClassAttribute in class Printer

visitInnerClass

public void visitInnerClass(String name,
                   String outerName,
                   String innerName,
                   int access)

Description copied from class: Printer

Class inner name. See ClassVisitor.visitInnerClass(java.lang.String, java.lang.String, java.lang.String, int).

Specified by:

visitInnerClass in class Printer

visitField

public Textifier visitField(int access,
                   String name,
                   String desc,
                   String signature,
                   Object value)

Description copied from class: Printer

Class field. See ClassVisitor.visitField(int, java.lang.String, java.lang.String, java.lang.String, java.lang.Object).

Specified by:

visitField in class Printer

visitMethod

public Textifier visitMethod(int access,
                    String name,
                    String desc,
                    String signature,
                    String[] exceptions)

Description copied from class: Printer

Class method. See ClassVisitor.visitMethod(int, java.lang.String, java.lang.String, java.lang.String, java.lang.String[]).

Specified by:

visitMethod in class Printer

visitClassEnd

public void visitClassEnd()

Description copied from class: Printer

Class end. See ClassVisitor.visitEnd().

Specified by:

visitClassEnd in class Printer

visit

public void visit(String name,
         Object value)

Description copied from class: Printer

Annotation value. See AnnotationVisitor.visit(java.lang.String, java.lang.Object).

Specified by:

visit in class Printer

visitEnum

public void visitEnum(String name,
             String desc,
             String value)

Description copied from class: Printer

Annotation enum value. See AnnotationVisitor.visitEnum(java.lang.String, java.lang.String, java.lang.String).

Specified by:

visitEnum in class Printer

visitAnnotation

public Textifier visitAnnotation(String name,
                        String desc)

Description copied from class: Printer

Nested annotation value. See AnnotationVisitor.visitAnnotation(java.lang.String, java.lang.String).

Specified by:

visitAnnotation in class Printer

visitArray

public Textifier visitArray(String name)

Description copied from class: Printer

Annotation array value. See AnnotationVisitor.visitArray(java.lang.String).

Specified by:

visitArray in class Printer

visitAnnotationEnd

public void visitAnnotationEnd()

Description copied from class: Printer

Annotation end. See AnnotationVisitor.visitEnd().

Specified by:

visitAnnotationEnd in class Printer

visitFieldAnnotation

public Textifier visitFieldAnnotation(String desc,
                             boolean visible)

Description copied from class: Printer

Field annotation. See FieldVisitor.visitAnnotation(java.lang.String, boolean).

Specified by:

visitFieldAnnotation in class Printer

visitFieldTypeAnnotation

public Printer visitFieldTypeAnnotation(int typeRef,
                               TypePath typePath,
                               String desc,
                               boolean visible)

Description copied from class: Printer

Field type annotation. See FieldVisitor.visitTypeAnnotation(int, org.mvel2.asm.TypePath, java.lang.String, boolean).

Overrides:

visitFieldTypeAnnotation in class Printer

visitFieldAttribute

public void visitFieldAttribute(Attribute attr)

Description copied from class: Printer

Field attribute. See FieldVisitor.visitAttribute(org.mvel2.asm.Attribute).

Specified by:

visitFieldAttribute in class Printer

visitFieldEnd

public void visitFieldEnd()

Description copied from class: Printer

Field end. See FieldVisitor.visitEnd().

Specified by:

visitFieldEnd in class Printer

visitParameter

public void visitParameter(String name,
                  int access)

Description copied from class: Printer

Method parameter. See MethodVisitor.visitParameter(String, int).

Overrides:

visitParameter in class Printer

visitAnnotationDefault

public Textifier visitAnnotationDefault()

Description copied from class: Printer

Method default annotation. See MethodVisitor.visitAnnotationDefault().

Specified by:

visitAnnotationDefault in class Printer

visitMethodAnnotation

public Textifier visitMethodAnnotation(String desc,
                              boolean visible)

Description copied from class: Printer

Method annotation. See MethodVisitor.visitAnnotation(java.lang.String, boolean).

Specified by:

visitMethodAnnotation in class Printer

visitMethodTypeAnnotation

public Printer visitMethodTypeAnnotation(int typeRef,
                                TypePath typePath,
                                String desc,
                                boolean visible)

Description copied from class: Printer

Method type annotation. See MethodVisitor.visitTypeAnnotation(int, org.mvel2.asm.TypePath, java.lang.String, boolean).

Overrides:

visitMethodTypeAnnotation in class Printer

visitParameterAnnotation

public Textifier visitParameterAnnotation(int parameter,
                                 String desc,
                                 boolean visible)

Description copied from class: Printer

Method parameter annotation. See MethodVisitor.visitParameterAnnotation(int, java.lang.String, boolean).

Specified by:

visitParameterAnnotation in class Printer

visitMethodAttribute

public void visitMethodAttribute(Attribute attr)

Description copied from class: Printer

Method attribute. See MethodVisitor.visitAttribute(org.mvel2.asm.Attribute).

Specified by:

visitMethodAttribute in class Printer

visitCode

public void visitCode()

Description copied from class: Printer

Method start. See MethodVisitor.visitCode().

Specified by:

visitCode in class Printer

visitFrame

public void visitFrame(int type,
              int nLocal,
              Object[] local,
              int nStack,
              Object[] stack)

Description copied from class: Printer

Method stack frame. See MethodVisitor.visitFrame(int, int, java.lang.Object[], int, java.lang.Object[]).

Specified by:

visitFrame in class Printer

visitInsn

public void visitInsn(int opcode)

Description copied from class: Printer

Method instruction. See MethodVisitor.visitInsn(int) .

Specified by:

visitInsn in class Printer

visitIntInsn

public void visitIntInsn(int opcode,
                int operand)

Description copied from class: Printer

Method instruction. See MethodVisitor.visitIntInsn(int, int).

Specified by:

visitIntInsn in class Printer

visitVarInsn

public void visitVarInsn(int opcode,
                int var)

Description copied from class: Printer

Method instruction. See MethodVisitor.visitVarInsn(int, int).

Specified by:

visitVarInsn in class Printer

visitTypeInsn

public void visitTypeInsn(int opcode,
                 String type)

Description copied from class: Printer

Method instruction. See MethodVisitor.visitTypeInsn(int, java.lang.String).

Specified by:

visitTypeInsn in class Printer

visitFieldInsn

public void visitFieldInsn(int opcode,
                  String owner,
                  String name,
                  String desc)

Description copied from class: Printer

Method instruction. See MethodVisitor.visitFieldInsn(int, java.lang.String, java.lang.String, java.lang.String).

Specified by:

visitFieldInsn in class Printer

visitMethodInsn

@Deprecated
public void visitMethodInsn(int opcode,
                              String owner,
                              String name,
                              String desc)

Deprecated.

Description copied from class: Printer

Method instruction. See MethodVisitor.visitMethodInsn(int, java.lang.String, java.lang.String, java.lang.String).

Overrides:

visitMethodInsn in class Printer

visitMethodInsn

public void visitMethodInsn(int opcode,
                   String owner,
                   String name,
                   String desc,
                   boolean itf)

Description copied from class: Printer

Method instruction. See MethodVisitor.visitMethodInsn(int, java.lang.String, java.lang.String, java.lang.String).

Overrides:

visitMethodInsn in class Printer

visitInvokeDynamicInsn

public void visitInvokeDynamicInsn(String name,
                          String desc,
                          Handle bsm,
                          Object... bsmArgs)

Description copied from class: Printer

Method instruction. See MethodVisitor.visitInvokeDynamicInsn(java.lang.String, java.lang.String, org.mvel2.asm.Handle, java.lang.Object...).

Specified by:

visitInvokeDynamicInsn in class Printer

visitJumpInsn

public void visitJumpInsn(int opcode,
                 Label label)

Description copied from class: Printer

Method instruction. See MethodVisitor.visitJumpInsn(int, org.mvel2.asm.Label).

Specified by:

visitJumpInsn in class Printer

visitLabel

public void visitLabel(Label label)

Description copied from class: Printer

Method label. See MethodVisitor.visitLabel(org.mvel2.asm.Label).

Specified by:

visitLabel in class Printer

visitLdcInsn

public void visitLdcInsn(Object cst)

Description copied from class: Printer

Method instruction. See MethodVisitor.visitLdcInsn(java.lang.Object).

Specified by:

visitLdcInsn in class Printer

visitIincInsn

public void visitIincInsn(int var,
                 int increment)

Description copied from class: Printer

Method instruction. See MethodVisitor.visitIincInsn(int, int).

Specified by:

visitIincInsn in class Printer

visitTableSwitchInsn

public void visitTableSwitchInsn(int min,
                        int max,
                        Label dflt,
                        Label... labels)

Description copied from class: Printer

Method instruction. See MethodVisitor.visitTableSwitchInsn(int, int, org.mvel2.asm.Label, org.mvel2.asm.Label...).

Specified by:

visitTableSwitchInsn in class Printer

visitLookupSwitchInsn

public void visitLookupSwitchInsn(Label dflt,
                         int[] keys,
                         Label[] labels)

Description copied from class: Printer

Method instruction. See MethodVisitor.visitLookupSwitchInsn(org.mvel2.asm.Label, int[], org.mvel2.asm.Label[]).

Specified by:

visitLookupSwitchInsn in class Printer

visitMultiANewArrayInsn

public void visitMultiANewArrayInsn(String desc,
                           int dims)

Description copied from class: Printer

Method instruction. See MethodVisitor.visitMultiANewArrayInsn(java.lang.String, int).

Specified by:

visitMultiANewArrayInsn in class Printer

visitInsnAnnotation

public Printer visitInsnAnnotation(int typeRef,
                          TypePath typePath,
                          String desc,
                          boolean visible)

Description copied from class: Printer

Instruction type annotation. See MethodVisitor.visitInsnAnnotation(int, org.mvel2.asm.TypePath, java.lang.String, boolean).

Overrides:

visitInsnAnnotation in class Printer

visitTryCatchBlock

public void visitTryCatchBlock(Label start,
                      Label end,
                      Label handler,
                      String type)

Description copied from class: Printer

Method exception handler. See MethodVisitor.visitTryCatchBlock(org.mvel2.asm.Label, org.mvel2.asm.Label, org.mvel2.asm.Label, java.lang.String).

Specified by:

visitTryCatchBlock in class Printer

visitTryCatchAnnotation

public Printer visitTryCatchAnnotation(int typeRef,
                              TypePath typePath,
                              String desc,
                              boolean visible)

Description copied from class: Printer

Try catch block type annotation. See MethodVisitor.visitTryCatchAnnotation(int, org.mvel2.asm.TypePath, java.lang.String, boolean).

Overrides:

visitTryCatchAnnotation in class Printer

visitLocalVariable

public void visitLocalVariable(String name,
                      String desc,
                      String signature,
                      Label start,
                      Label end,
                      int index)

Description copied from class: Printer

Method debug info. See MethodVisitor.visitLocalVariable(java.lang.String, java.lang.String, java.lang.String, org.mvel2.asm.Label, org.mvel2.asm.Label, int).

Specified by:

visitLocalVariable in class Printer

visitLocalVariableAnnotation

public Printer visitLocalVariableAnnotation(int typeRef,
                                   TypePath typePath,
                                   Label[] start,
                                   Label[] end,
                                   int[] index,
                                   String desc,
                                   boolean visible)

Description copied from class: Printer

Local variable type annotation. See MethodVisitor.visitTryCatchAnnotation(int, org.mvel2.asm.TypePath, java.lang.String, boolean).

Overrides:

visitLocalVariableAnnotation in class Printer

visitLineNumber

public void visitLineNumber(int line,
                   Label start)

Description copied from class: Printer

Method debug info. See MethodVisitor.visitLineNumber(int, org.mvel2.asm.Label).

Specified by:

visitLineNumber in class Printer

visitMaxs

public void visitMaxs(int maxStack,
             int maxLocals)

Description copied from class: Printer

Method max stack and max locals. See MethodVisitor.visitMaxs(int, int).

Specified by:

visitMaxs in class Printer

visitMethodEnd

public void visitMethodEnd()

Description copied from class: Printer

Method end. See MethodVisitor.visitEnd().

Specified by:

visitMethodEnd in class Printer

visitAnnotation

public Textifier visitAnnotation(String desc,
                        boolean visible)

Prints a disassembled view of the given annotation.

Parameters:

desc - the class descriptor of the annotation class.

visible - true if the annotation is visible at runtime.

Returns:

a visitor to visit the annotation values.

visitTypeAnnotation

public Textifier visitTypeAnnotation(int typeRef,
                            TypePath typePath,
                            String desc,
                            boolean visible)

Prints a disassembled view of the given type annotation.

Parameters:

typeRef - a reference to the annotated type. See TypeReference.

typePath - the path to the annotated type argument, wildcard bound, array element type, or static inner type within 'typeRef'. May be null if the annotation targets 'typeRef' as a whole.

desc - the class descriptor of the annotation class.

visible - true if the annotation is visible at runtime.

Returns:

a visitor to visit the annotation values.

visitAttribute

public void visitAttribute(Attribute attr)

Prints a disassembled view of the given attribute.

Parameters:

attr - an attribute.

createTextifier

protected Textifier createTextifier()

Creates a new TraceVisitor instance.

Returns:

a new TraceVisitor.

appendDescriptor

protected void appendDescriptor(int type,
                    String desc)

Appends an internal name, a type descriptor or a type signature to buf.

Parameters:

type - indicates if desc is an internal name, a field descriptor, a method descriptor, a class signature, ...

desc - an internal name, type descriptor, or type signature. May be null.

appendLabel

protected void appendLabel(Label l)

Appends the name of the given label to buf. Creates a new label name if the given label does not yet have one.

Parameters:

l - a label.

appendHandle

protected void appendHandle(Handle h)

Appends the information about the given handle to buf.

Parameters:

h - a handle, non null.