/*

 * Copyright (c) 1994, 2019, Oracle and/or its affiliates. All rights reserved.

 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.

 *

 * This code is free software; you can redistribute it and/or modify it

 * under the terms of the GNU General Public License version 2 only, as

 * published by the Free Software Foundation.  Oracle designates this

 * particular file as subject to the "Classpath" exception as provided

 * by Oracle in the LICENSE file that accompanied this code.

 *

 * This code is distributed in the hope that it will be useful, but WITHOUT

 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or

 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License

 * version 2 for more details (a copy is included in the LICENSE file that

 * accompanied this code).

 *

 * You should have received a copy of the GNU General Public License version

 * 2 along with this work; if not, write to the Free Software Foundation,

 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.

 *

 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA

 * or visit www.oracle.com if you need additional information or have any

 * questions.

 */

/*-

 *      Implementation of class Class

 *

 *      former threadruntime.c, Sun Sep 22 12:09:39 1991

 */

#include <string.h>

#include <stdlib.h>

#include "jni.h"

#include "jni_util.h"

#include "jvm.h"

#include "check_classname.h"

#include "java_lang_Class.h"

#define OBJ "Ljava/lang/Object;"

#define CLS "Ljava/lang/Class;"

#define CPL "Ljdk/internal/reflect/ConstantPool;"

#define STR "Ljava/lang/String;"

#define FLD "Ljava/lang/reflect/Field;"

#define MHD "Ljava/lang/reflect/Method;"

#define CTR "Ljava/lang/reflect/Constructor;"

#define PD  "Ljava/security/ProtectionDomain;"

#define BA  "[B"

static JNINativeMethod methods[] = {

    {"initClassName",    "()" STR,          (void *)&JVM_InitClassName},

    {"getSuperclass",    "()" CLS,          NULL},

    {"getInterfaces0",   "()[" CLS,         (void *)&JVM_GetClassInterfaces},

    {"isInterface",      "()Z",             (void *)&JVM_IsInterface},

    {"getSigners",       "()[" OBJ,         (void *)&JVM_GetClassSigners},

    {"setSigners",       "([" OBJ ")V",     (void *)&JVM_SetClassSigners},

    {"isArray",          "()Z",             (void *)&JVM_IsArrayClass},

    {"isPrimitive",      "()Z",             (void *)&JVM_IsPrimitiveClass},

    {"getModifiers",     "()I",             (void *)&JVM_GetClassModifiers},

    {"getDeclaredFields0","(Z)[" FLD,       (void *)&JVM_GetClassDeclaredFields},

    {"getDeclaredMethods0","(Z)[" MHD,      (void *)&JVM_GetClassDeclaredMethods},

    {"getDeclaredConstructors0","(Z)[" CTR, (void *)&JVM_GetClassDeclaredConstructors},

    {"getProtectionDomain0", "()" PD,       (void *)&JVM_GetProtectionDomain},

    {"getDeclaredClasses0",  "()[" CLS,     (void *)&JVM_GetDeclaredClasses},

    {"getDeclaringClass0",   "()" CLS,      (void *)&JVM_GetDeclaringClass},

    {"getSimpleBinaryName0", "()" STR,      (void *)&JVM_GetSimpleBinaryName},

    {"getGenericSignature0", "()" STR,      (void *)&JVM_GetClassSignature},

    {"getRawAnnotations",      "()" BA,     (void *)&JVM_GetClassAnnotations},

    {"getConstantPool",     "()" CPL,       (void *)&JVM_GetClassConstantPool},

    {"desiredAssertionStatus0","("CLS")Z",  (void *)&JVM_DesiredAssertionStatus},

    {"getEnclosingMethod0", "()[" OBJ,      (void *)&JVM_GetEnclosingMethodInfo},

    {"getRawTypeAnnotations", "()" BA,      (void *)&JVM_GetClassTypeAnnotations},

    {"getNestHost0",         "()" CLS,      (void *)&JVM_GetNestHost},

    {"getNestMembers0",      "()[" CLS,     (void *)&JVM_GetNestMembers},

    {"linkClass",            "(" CLS ")V",  (void *)&JVM_LinkClass},

};

#undef OBJ

#undef CLS

#undef STR

#undef FLD

#undef MHD

#undef CTR

#undef PD

JNIEXPORT void JNICALL

Java_java_lang_Class_registerNatives(JNIEnv *env, jclass cls)

{

    methods[1].fnPtr = (void *)(*env)->GetSuperclass;

    (*env)->RegisterNatives(env, cls, methods,

                            sizeof(methods)/sizeof(JNINativeMethod));

}

JNIEXPORT jclass JNICALL

Java_java_lang_Class_forName0(JNIEnv *env, jclass this, jstring classname,

                              jboolean initialize, jobject loader, jclass caller)

{

    char *clname;

    jclass cls = 0;

    char buf[128];

    jsize len;

    jsize unicode_len;

    if (classname == NULL) {

        JNU_ThrowNullPointerException(env, 0);

        return 0;

    }

    len = (*env)->GetStringUTFLength(env, classname);

    unicode_len = (*env)->GetStringLength(env, classname);

    if (len >= (jsize)sizeof(buf)) {

        clname = malloc(len + 1);

        if (clname == NULL) {

            JNU_ThrowOutOfMemoryError(env, NULL);

            return NULL;

        }

    } else {

        clname = buf;

    }

    (*env)->GetStringUTFRegion(env, classname, 0, unicode_len, clname);

    if (verifyFixClassname(clname) == JNI_TRUE) {

        /* slashes present in clname, use name b4 translation for exception */

        (*env)->GetStringUTFRegion(env, classname, 0, unicode_len, clname);

        JNU_ThrowClassNotFoundException(env, clname);

        goto done;

    }

    if (!verifyClassname(clname, JNI_TRUE)) {  /* expects slashed name */

        JNU_ThrowClassNotFoundException(env, clname);

        goto done;

    }

    cls = JVM_FindClassFromCaller(env, clname, initialize, loader, caller);

 done:

    if (clname != buf) {

        free(clname);

    }

    return cls;

}

JNIEXPORT jboolean JNICALL

Java_java_lang_Class_isInstance(JNIEnv *env, jobject cls, jobject obj)

{

    if (obj == NULL) {

        return JNI_FALSE;

    }

    return (*env)->IsInstanceOf(env, obj, (jclass)cls);

}

JNIEXPORT jboolean JNICALL

Java_java_lang_Class_isAssignableFrom(JNIEnv *env, jobject cls, jobject cls2)

{

    if (cls2 == NULL) {

        JNU_ThrowNullPointerException(env, 0);

        return JNI_FALSE;

    }

    return (*env)->IsAssignableFrom(env, cls2, cls);

}

JNIEXPORT jclass JNICALL

Java_java_lang_Class_getPrimitiveClass(JNIEnv *env,

                                       jclass cls,

                                       jstring name)

{

    const char *utfName;

    jclass result;

    if (name == NULL) {

        JNU_ThrowNullPointerException(env, 0);

        return NULL;

    }

    utfName = (*env)->GetStringUTFChars(env, name, 0);

    if (utfName == 0)

        return NULL;

    result = JVM_FindPrimitiveClass(env, utfName);

    (*env)->ReleaseStringUTFChars(env, name, utfName);

    return result;

}