124 lines
2.8 KiB
C
124 lines
2.8 KiB
C
/*
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* BindingsUtil.c
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*
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* Copyright (c) 2007 Vreixo Formoso
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*
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* This library is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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* See COPYING file for details.
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*/
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#include "BindingsUtil.h"
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#define JAVA_LIBBURN_JNI_VERSION JNI_VERSION_1_4
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static JavaVM* cachedJavaVM;
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JNIEXPORT jint JNICALL
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JNI_OnLoad
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(
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JavaVM *jvm,
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void *reserved
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)
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{
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if (jvm == NULL) {
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perror("null JavaVM pointer");
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}
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cachedJavaVM = jvm;
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return JAVA_LIBBURN_JNI_VERSION;
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}
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/**
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* Creates a new TocEntry java class from a burn_toc_entry C struct
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*/
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jobject java_libburn_toc_entry_c2java
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(
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JNIEnv *env, struct burn_toc_entry *entry
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)
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{
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static jclass tocEntryCls = NULL;
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static jmethodID cid = NULL;
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jobject result;
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if ( tocEntryCls == NULL ) {
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tocEntryCls = (*env)->FindClass(env, "org/pykix/libburnia/libburn/TocEntry");
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if ( tocEntryCls == NULL ) {
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return NULL;
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}
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}
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if ( cid == NULL ) {
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cid = (*env)->GetMethodID(env, tocEntryCls, "<init>", "(BBBBBBBBBBBBBBBII)V");
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if (cid == NULL) {
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return NULL; /* exception thrown */
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}
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}
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result = (*env)->NewObject(env, tocEntryCls, cid, entry->session, entry->adr, entry->control,
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entry->tno, entry->point, entry->min, entry->sec, entry->frame, entry->zero, entry->pmin,
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entry->psec, entry->pframe, entry->extensions_valid, entry->session_msb,
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entry->point_msb, entry->start_lba, entry->track_blocks);
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return result;
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}
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void java_libburn_throw_burn_exception
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(
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JNIEnv *env, const char *msg
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)
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{
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static jclass cls = NULL;
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if ( cls == NULL) {
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cls = (*env)->FindClass(env, "org/pykix/libburnia/libburn/BurnException");
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}
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(*env)->ThrowNew(env, cls, msg);
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}
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jclass java_libburn_find_class
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(
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JNIEnv *env, const char *name
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)
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{
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jclass localRefCls = (*env)->FindClass(env, name);
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if (localRefCls == NULL) {
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return NULL; /* exception thrown */
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}
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jclass globalRef = (*env)->NewWeakGlobalRef(env, localRefCls);
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(*env)->DeleteLocalRef(env, localRefCls);
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return globalRef; //can be NULL on error, need to be checked!!
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}
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JNIEnv* java_libburn_get_env()
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{
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JNIEnv* env;
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jint result;
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result = (*cachedJavaVM)->GetEnv(cachedJavaVM, (void **) &env, JAVA_LIBBURN_JNI_VERSION);
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if ( result != JNI_OK) {
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switch (result) {
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case JNI_EDETACHED:
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perror("[DEBUG] Current thread is not attached. Attaching...");
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JavaVMAttachArgs args;
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args.version = JAVA_LIBBURN_JNI_VERSION;
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args.name = "Signal handler callback";
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args.group = NULL;
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(*cachedJavaVM)->AttachCurrentThread(cachedJavaVM, (void **)&env, &args);
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return env;
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break;
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case JNI_EVERSION:
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g_error("Specified version is not supported.");
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break;
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}
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return NULL;
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}
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return env;
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}
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