Put libuuid JNI bridge in a dedicated package.

[lgpl/argeo-commons.git] / org.argeo.api.uuid / jni / org_argeo_api_uuid_libuuid / org_argeo_api_uuid_libuuid_LibuuidFactory.c

diff --git a/org.argeo.api.uuid/jni/org_argeo_api_uuid_libuuid/org_argeo_api_uuid_libuuid_LibuuidFactory.c b/org.argeo.api.uuid/jni/org_argeo_api_uuid_libuuid/org_argeo_api_uuid_libuuid_LibuuidFactory.c
new file mode 100644 (file)
index 0000000..cff3cc5
--- /dev/null
+++ b/org.argeo.api.uuid/jni/org_argeo_api_uuid_libuuid/org_argeo_api_uuid_libuuid_LibuuidFactory.c
@@ -0,0 +1,89 @@
+#include <jni.h>
+#include <uuid.h>
+#include "org_argeo_api_uuid_libuuid_LibuuidFactory.h"
+
+/*
+ * UTILITIES
+ */
+
+static inline jobject fromBytes(JNIEnv *env, uuid_t out) {
+       jlong msb = 0;
+       jlong lsb = 0;
+
+       for (int i = 0; i < 8; i++)
+               msb = (msb << 8) | (out[i] & 0xff);
+       for (int i = 8; i < 16; i++)
+               lsb = (lsb << 8) | (out[i] & 0xff);
+
+       jclass uuidClass = (*env)->FindClass(env, "java/util/UUID");
+       jmethodID uuidConstructor = (*env)->GetMethodID(env, uuidClass, "<init>",
+                       "(JJ)V");
+
+       jobject jUUID = (*env)->AllocObject(env, uuidClass);
+       (*env)->CallVoidMethod(env, jUUID, uuidConstructor, msb, lsb);
+
+       return jUUID;
+}
+
+static inline void toBytes(JNIEnv *env, jobject jUUID, uuid_t result) {
+
+       jclass uuidClass = (*env)->FindClass(env, "java/util/UUID");
+       jmethodID getMostSignificantBits = (*env)->GetMethodID(env, uuidClass,
+                       "getMostSignificantBits", "()J");
+       jmethodID getLeastSignificantBits = (*env)->GetMethodID(env, uuidClass,
+                       "getLeastSignificantBits", "()J");
+
+       jlong msb = (*env)->CallLongMethod(env, jUUID, getMostSignificantBits);
+       jlong lsb = (*env)->CallLongMethod(env, jUUID, getLeastSignificantBits);
+
+       for (int i = 0; i < 8; i++)
+               result[i] = (unsigned char) ((msb >> ((7 - i) * 8)) & 0xff);
+       for (int i = 8; i < 16; i++)
+               result[i] = (unsigned char) ((lsb >> ((15 - i) * 8)) & 0xff);
+}
+
+/*
+ * JNI IMPLEMENTATION
+ */
+
+JNIEXPORT jobject JNICALL Java_org_argeo_api_uuid_libuuid_LibuuidFactory_timeUUID(
+               JNIEnv *env, jobject) {
+       uuid_t out;
+
+       uuid_generate_time(out);
+       return fromBytes(env, out);
+}
+
+JNIEXPORT jobject JNICALL Java_org_argeo_api_uuid_libuuid_LibuuidFactory_nameUUIDv5(
+               JNIEnv *env, jobject, jobject namespaceUuid, jbyteArray name) {
+       uuid_t ns;
+       uuid_t out;
+
+       toBytes(env, namespaceUuid, ns);
+       jsize length = (*env)->GetArrayLength(env, name);
+       jbyte *bytes = (*env)->GetByteArrayElements(env, name, 0);
+
+       uuid_generate_sha1(out, ns, bytes, length);
+       return fromBytes(env, out);
+}
+
+JNIEXPORT jobject JNICALL Java_org_argeo_api_uuid_libuuid_LibuuidFactory_nameUUIDv3(
+               JNIEnv *env, jobject, jobject namespaceUuid, jbyteArray name) {
+       uuid_t ns;
+       uuid_t out;
+
+       toBytes(env, namespaceUuid, ns);
+       jsize length = (*env)->GetArrayLength(env, name);
+       jbyte *bytes = (*env)->GetByteArrayElements(env, name, 0);
+
+       uuid_generate_md5(out, ns, bytes, length);
+       return fromBytes(env, out);
+}
+
+JNIEXPORT jobject JNICALL Java_org_argeo_api_uuid_libuuid_LibuuidFactory_randomUUIDStrong(
+               JNIEnv *env, jobject) {
+       uuid_t out;
+
+       uuid_generate_random(out);
+       return fromBytes(env, out);
+}