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gen.go
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gen.go
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package tool
import (
"bytes"
"fmt"
)
func GenerateCode(pkg string) string {
return generateCode(pkg, parseJniMethodList(headerCode))
}
func generateCode(pkg string, list []*method) string {
buf := bytes.NewBuffer(nil)
fmt.Fprintf(buf, "package %s\n", pkg)
fmt.Fprint(buf, `
//
// #include <jni.h>
// #include <stdlib.h>
//
// static inline jint AttachCurrentThread(JavaVM *vm, JNIEnv **p_env) {
// return (*vm)->AttachCurrentThread(vm, (void **) p_env, NULL);
// }
//
// static inline jint AttachCurrentThreadAsDaemon(JavaVM *vm, JNIEnv **p_env) {
// return (*vm)->AttachCurrentThreadAsDaemon(vm, (void **) p_env, NULL);
// }
//
// static inline jint GetEnv(JavaVM *vm, JNIEnv **penv, jint version) {
// return (*vm)->GetEnv(vm, (void **) penv, version);
// }
//
// static inline jint GetJavaVM(JNIEnv * env, JavaVM **vm) {
// return (*env)->GetJavaVM(env, vm);
// }
//
// static inline int GetObjectRefType(JNIEnv * env, jobject obj) {
// return (int) (*env)->GetObjectRefType(env, obj);
// }
//
`)
for _, m := range list {
if skip, err := generateFuncCode(m, buf); err == nil {
if !skip {
fmt.Fprintln(buf, "//")
}
}
}
fmt.Fprint(buf, `import "C"
import (
"unicode/utf16"
"unsafe"
)
const (
JNI_VERSION_1_1 = 0x00010001
JNI_VERSION_1_2 = 0x00010002
JNI_VERSION_1_4 = 0x00010004
JNI_VERSION_1_6 = 0x00010006
JNI_VERSION_1_8 = 0x00010008
JNI_VERSION_9 = 0x00090000
JNI_VERSION_10 = 0x000a0000
JNI_FALSE = 0
JNI_TRUE = 1
JNI_OK = 0 /* success */
JNI_ERR = (-1) /* unknown error */
JNI_EDETACHED = (-2) /* thread detached from the VM */
JNI_EVERSION = (-3) /* JNI version error */
JNI_ENOMEM = (-4) /* not enough memory */
JNI_EEXIST = (-5) /* VM already created */
JNI_EINVAL = (-6) /* invalid arguments */
JNI_COMMIT = 1
JNI_ABORT = 2
)
type RefType int
const (
Invalid RefType = iota
Local
Global
WeakGlobal
)
type Jobject = uintptr
type Jclass = uintptr
type Jthrowable = uintptr
type Jstring = uintptr
type Jarray = uintptr
type JbooleanArray = uintptr
type JbyteArray = uintptr
type JcharArray = uintptr
type JshortArray = uintptr
type JintArray = uintptr
type JlongArray = uintptr
type JfloatArray = uintptr
type JdoubleArray = uintptr
type JobjectArray = uintptr
type Jweak = uintptr
type Jvalue = uint64
type JmethodID = uintptr
type JfieldID = uintptr
type VM uintptr
func (vm VM) AttachCurrentThread() (Env, int) {
var env *C.JNIEnv
ret := int(C.AttachCurrentThread((*C.JavaVM)(unsafe.Pointer(vm)), &env))
return Env(unsafe.Pointer(env)), ret
}
func (vm VM) AttachCurrentThreadAsDaemon() (Env, int) {
var env *C.JNIEnv
ret := int(C.AttachCurrentThreadAsDaemon((*C.JavaVM)(unsafe.Pointer(vm)), &env))
return Env(unsafe.Pointer(env)), ret
}
func (vm VM) GetEnv(version int) (Env, int) {
var env *C.JNIEnv
ret := int(C.GetEnv((*C.JavaVM)(unsafe.Pointer(vm)), &env, C.jint(version)))
return Env(unsafe.Pointer(env)), ret
}
type Env uintptr
func (env Env) GetJavaVM() (VM, int) {
var vm *C.JavaVM
ret := int(C.GetJavaVM((*C.JNIEnv)(unsafe.Pointer(env)), &vm))
return VM(unsafe.Pointer(vm)), ret
}
func (env Env) GetObjectRefType(obj Jobject) RefType {
return RefType(C.GetObjectRefType((*C.JNIEnv)(unsafe.Pointer(env)), C.jobject(obj)))
}
func (env Env) NewString(s string) Jstring {
codes := utf16.Encode([]rune(s))
size := len(codes)
if size <= 0 {
return 0
} else {
return Jstring(C.NewString((*C.JNIEnv)(unsafe.Pointer(env)), (*C.jchar)(unsafe.Pointer(&codes[0])), C.jsize(size)))
}
}
func (env Env) GetStringUTF(ptr Jstring) []byte {
jstr := C.jstring(ptr)
size := C.GetStringUTFLength((*C.JNIEnv)(unsafe.Pointer(env)), jstr)
ret := make([]byte, int(size))
C.GetStringUTFRegion((*C.JNIEnv)(unsafe.Pointer(env)), jstr, C.jsize(0), C.GetStringLength((*C.JNIEnv)(unsafe.Pointer(env)), jstr), cmem(ret))
return ret
}
func (env Env) NewDirectByteBuffer(address unsafe.Pointer, capacity int) Jobject {
return Jobject(C.NewDirectByteBuffer((*C.JNIEnv)(unsafe.Pointer(env)), address, C.jlong(capacity)))
}
func (env Env) GetDirectBufferAddress(buf Jobject) unsafe.Pointer {
return C.GetDirectBufferAddress((*C.JNIEnv)(unsafe.Pointer(env)), C.jobject(buf))
}
func (env Env) GetDirectBufferCapacity(buf Jobject) int {
return int(C.GetDirectBufferCapacity((*C.JNIEnv)(unsafe.Pointer(env)), C.jobject(buf)))
}
func (env Env) GetBooleanArrayElement(array JbooleanArray, index int) bool {
var ret C.jboolean
C.GetBooleanArrayRegion((*C.JNIEnv)(unsafe.Pointer(env)), C.jbooleanArray(array), C.jsize(index), C.jsize(1), &ret)
return ret != C.JNI_FALSE
}
func (env Env) GetByteArrayElement(array JbyteArray, index int) byte {
var ret C.jbyte
C.GetByteArrayRegion((*C.JNIEnv)(unsafe.Pointer(env)), C.jbyteArray(array), C.jsize(index), C.jsize(1), &ret)
return byte(ret)
}
func (env Env) GetCharArrayElement(array JcharArray, index int) uint16 {
var ret C.jchar
C.GetCharArrayRegion((*C.JNIEnv)(unsafe.Pointer(env)), C.jcharArray(array), C.jsize(index), C.jsize(1), &ret)
return uint16(ret)
}
func (env Env) GetShortArrayElement(array JshortArray, index int) int16 {
var ret C.jshort
C.GetShortArrayRegion((*C.JNIEnv)(unsafe.Pointer(env)), C.jshortArray(array), C.jsize(index), C.jsize(1), &ret)
return int16(ret)
}
func (env Env) GetIntArrayElement(array JintArray, index int) int {
var ret C.jint
C.GetIntArrayRegion((*C.JNIEnv)(unsafe.Pointer(env)), C.jintArray(array), C.jsize(index), C.jsize(1), &ret)
return int(ret)
}
func (env Env) GetLongArrayElement(array JlongArray, index int) int64 {
var ret C.jlong
C.GetLongArrayRegion((*C.JNIEnv)(unsafe.Pointer(env)), C.jlongArray(array), C.jsize(index), C.jsize(1), &ret)
return int64(ret)
}
func (env Env) GetFloatArrayElement(array JfloatArray, index int) float32 {
var ret C.jfloat
C.GetFloatArrayRegion((*C.JNIEnv)(unsafe.Pointer(env)), C.jfloatArray(array), C.jsize(index), C.jsize(1), &ret)
return float32(ret)
}
func (env Env) GetDoubleArrayElement(array JdoubleArray, index int) float64 {
var ret C.jdouble
C.GetDoubleArrayRegion((*C.JNIEnv)(unsafe.Pointer(env)), C.jdoubleArray(array), C.jsize(index), C.jsize(1), &ret)
return float64(ret)
}
func (env Env) SetBooleanArrayElement(array JbooleanArray, index int, v bool) {
cv := cbool(v)
C.SetBooleanArrayRegion((*C.JNIEnv)(unsafe.Pointer(env)), C.jbooleanArray(array), C.jsize(index), C.jsize(1), &cv)
}
func (env Env) SetByteArrayElement(array JbyteArray, index int, v byte) {
cv := C.jbyte(v)
C.SetByteArrayRegion((*C.JNIEnv)(unsafe.Pointer(env)), C.jbyteArray(array), C.jsize(index), C.jsize(1), &cv)
}
func (env Env) SetCharArrayElement(array JcharArray, index int, v uint16) {
cv := C.jchar(v)
C.SetCharArrayRegion((*C.JNIEnv)(unsafe.Pointer(env)), C.jcharArray(array), C.jsize(index), C.jsize(1), &cv)
}
func (env Env) SetShortArrayElement(array JshortArray, index int, v int16) {
cv := C.jshort(v)
C.SetShortArrayRegion((*C.JNIEnv)(unsafe.Pointer(env)), C.jshortArray(array), C.jsize(index), C.jsize(1), &cv)
}
func (env Env) SetIntArrayElement(array JintArray, index int, v int) {
cv := C.jint(v)
C.SetIntArrayRegion((*C.JNIEnv)(unsafe.Pointer(env)), C.jintArray(array), C.jsize(index), C.jsize(1), &cv)
}
func (env Env) SetLongArrayElement(array JlongArray, index int, v int64) {
cv := C.jlong(v)
C.SetLongArrayRegion((*C.JNIEnv)(unsafe.Pointer(env)), C.jlongArray(array), C.jsize(index), C.jsize(1), &cv)
}
func (env Env) SetFloatArrayElement(array JfloatArray, index int, v float32) {
cv := C.jfloat(v)
C.SetFloatArrayRegion((*C.JNIEnv)(unsafe.Pointer(env)), C.jfloatArray(array), C.jsize(index), C.jsize(1), &cv)
}
func (env Env) SetDoubleArrayElement(array JdoubleArray, index int, v float64) {
cv := C.jdouble(v)
C.SetDoubleArrayRegion((*C.JNIEnv)(unsafe.Pointer(env)), C.jdoubleArray(array), C.jsize(index), C.jsize(1), &cv)
}
`)
for _, m := range list {
if skip, err := generateGoFuncCode(m, buf); err == nil {
if !skip {
fmt.Fprintln(buf)
}
}
}
fmt.Fprint(buf, `func DoubleValue(f float64) Jvalue {
return *(*Jvalue)(unsafe.Pointer(&f))
}
func FloatValue(f float32) Jvalue {
return Jvalue(*(*uint32)(unsafe.Pointer(&f)))
}
func Int8Value(i int8) Jvalue {
return Jvalue(*(*uint8)(unsafe.Pointer(&i)))
}
func Int16Value(i int16) Jvalue {
return Jvalue(*(*uint16)(unsafe.Pointer(&i)))
}
func Int32Value(i int32) Jvalue {
return Jvalue(*(*uint32)(unsafe.Pointer(&i)))
}
func IntValue(i int) Jvalue {
return Jvalue(*(*uint)(unsafe.Pointer(&i)))
}
func BooleanValue(b bool) Jvalue {
return Jvalue(cbool(b))
}
func Bool(b uint8) bool {
return b != 0
}
func CMalloc(capacity int) unsafe.Pointer {
return C.malloc(C.size_t(capacity))
}
func CFree(p unsafe.Pointer) {
C.free(p)
}
func ByteSlicePtr(b []byte) unsafe.Pointer {
return unsafe.Pointer(unsafe.SliceData(b))
}
func cmem(b []byte) *C.char {
return (*C.char)(ByteSlicePtr(b))
}
func cbool(b bool) C.jboolean {
if b {
return C.JNI_TRUE
} else {
return C.JNI_FALSE
}
}
func cvals(v []Jvalue) *C.jvalue {
if len(v) == 0 {
return nil
}
return (*C.jvalue)(unsafe.Pointer(unsafe.SliceData(v)))
}
func cBooleanArray(a []bool) *C.jboolean {
return (*C.jboolean)(unsafe.Pointer(unsafe.SliceData(a)))
}
func cByteArray(a []byte) *C.jbyte {
return (*C.jbyte)(unsafe.Pointer(unsafe.SliceData(a)))
}
func cShortArray(a []int16) *C.jshort {
return (*C.jshort)(unsafe.Pointer(unsafe.SliceData(a)))
}
func cCharArray(a []uint16) *C.jchar {
return (*C.jchar)(unsafe.Pointer(unsafe.SliceData(a)))
}
func cIntArray(a []int32) *C.jint {
return (*C.jint)(unsafe.Pointer(unsafe.SliceData(a)))
}
func cLongArray(a []int64) *C.jlong {
return (*C.jlong)(unsafe.Pointer(unsafe.SliceData(a)))
}
func cFloatArray(a []float32) *C.jfloat {
return (*C.jfloat)(unsafe.Pointer(unsafe.SliceData(a)))
}
func cDoubleArray(a []float64) *C.jdouble {
return (*C.jdouble)(unsafe.Pointer(unsafe.SliceData(a)))
}
`)
return buf.String()
}
// 处理参数,去掉参数中的 const
// 处理返回值,去掉返回值中的 const
func generateFuncCode(m *method, buf *bytes.Buffer) (skip bool, err error) {
if m.isVarArgs() || m.isVaList() {
return false, fmt.Errorf("%s 处理不了不定参数的情况", m)
}
if containsInSkipList(m.name, skipList) {
// 忽略
return true, nil
}
fmt.Fprintf(buf, "// static inline %s %s(%s) {\n",
m.ret.toC().TypeDesc(), m.name, m.toC().paramList())
ret := ""
if m.hasRetVal() {
ret = "return "
}
expr := fmt.Sprintf("(*%s)->%s(%s)",
m.params[0].idName,
m.name,
m.toC().callList())
expr = m.toC().beforeReturn(expr)
fmt.Fprintf(buf, "// %s%s;\n",
ret,
expr)
fmt.Fprint(buf, "// }\n")
return false, nil
}
func generateGoFuncCode(m *method, buf *bytes.Buffer) (bool, error) {
if m.isVarArgs() || m.isVaList() {
return false, fmt.Errorf("%s 处理不了不定参数的情况", m)
}
if containsInSkipList(m.name, skipList) || containsInSkipList(m.name, goSkipList) {
// 忽略
return true, nil
}
fmt.Fprintf(buf, "func (%s %s) %s(%s)%s {\n",
m.params[0].idName, m.params[0].cType.toGo().TypeDesc(),
m.name, m.toGo().paramList(), m.goRetVal())
m.toGo().prepareReturn(buf)
ret := ""
if m.hasRetVal() {
ret = "return "
}
expr := fmt.Sprintf("C.%s(%s)",
m.name,
m.toGo().callList())
expr = m.toGo().beforeReturn(expr)
fmt.Fprintf(buf, "\t%s%s\n",
ret,
expr)
fmt.Fprint(buf, "}\n")
return false, nil
}