1 files changed, 163 insertions, 0 deletions
diff --git a/core/jni/android_os_StatFs.cpp b/core/jni/android_os_StatFs.cpp
new file mode 100644
index 0000000..c658aa5
--- /dev/null
+++ b/core/jni/android_os_StatFs.cpp
@@ -0,0 +1,163 @@
+/*
+ * Copyright 2007, The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#if INCLUDE_SYS_MOUNT_FOR_STATFS
+#include <sys/mount.h>
+#else
+#include <sys/statfs.h>
+#endif
+
+#include <errno.h>
+
+#include "jni.h"
+#include "JNIHelp.h"
+#include "android_runtime/AndroidRuntime.h"
+
+
+namespace android
+{
+
+// ----------------------------------------------------------------------------
+
+struct fields_t {
+    jfieldID    context;
+};
+static fields_t fields;
+
+// ----------------------------------------------------------------------------
+
+static jint
+android_os_StatFs_getBlockSize(JNIEnv *env, jobject thiz)
+{
+    struct statfs *stat = (struct statfs *)env->GetIntField(thiz, fields.context);
+    return stat->f_bsize;
+}
+
+static jint
+android_os_StatFs_getBlockCount(JNIEnv *env, jobject thiz)
+{
+    struct statfs *stat = (struct statfs *)env->GetIntField(thiz, fields.context);
+    return stat->f_blocks;
+}
+
+static jint
+android_os_StatFs_getFreeBlocks(JNIEnv *env, jobject thiz)
+{
+    struct statfs *stat = (struct statfs *)env->GetIntField(thiz, fields.context);
+    return stat->f_bfree;
+}
+
+static jint
+android_os_StatFs_getAvailableBlocks(JNIEnv *env, jobject thiz)
+{
+    struct statfs *stat = (struct statfs *)env->GetIntField(thiz, fields.context);
+    return stat->f_bavail;
+}
+
+static void
+android_os_StatFs_native_restat(JNIEnv *env, jobject thiz, jstring path)
+{
+    if (path == NULL) {
+        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        return;
+    }
+
+    // get the object handle
+    struct statfs *stat = (struct statfs *)env->GetIntField(thiz, fields.context);
+    if (stat == NULL) {
+        jniThrowException(env, "java/lang/NoSuchFieldException", NULL);
+        return;
+    }
+
+    const char* pathstr = env->GetStringUTFChars(path, NULL);
+    if (pathstr == NULL) {
+        jniThrowException(env, "java/lang/RuntimeException", "Out of memory");
+        return;
+    }
+
+    // note that stat will contain the new file data corresponding to
+    // pathstr
+    if (statfs(pathstr, stat) != 0) {
+        LOGE("statfs %s failed, errno: %d", pathstr, errno);
+        delete stat;
+        env->SetIntField(thiz, fields.context, 0);
+        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+    }
+    // Release pathstr
+    env->ReleaseStringUTFChars(path, pathstr);
+}
+
+static void
+android_os_StatFs_native_setup(JNIEnv *env, jobject thiz, jstring path)
+{
+    if (path == NULL) {
+        jniThrowException(env, "java/lang/IllegalArgumentException", NULL);
+        return;
+    }
+
+    struct statfs* stat = new struct statfs;
+    if (stat == NULL) {
+        jniThrowException(env, "java/lang/RuntimeException", "Out of memory");
+        return;
+    }
+    env->SetIntField(thiz, fields.context, (int)stat);
+    android_os_StatFs_native_restat(env, thiz, path);
+}
+
+static void
+android_os_StatFs_native_finalize(JNIEnv *env, jobject thiz)
+{
+    struct statfs *stat = (struct statfs *)env->GetIntField(thiz, fields.context);
+    if (stat != NULL) {
+        delete stat;
+        env->SetIntField(thiz, fields.context, 0);
+    }
+}
+
+// ----------------------------------------------------------------------------
+
+static JNINativeMethod gMethods[] = {
+    {"getBlockSize",       "()I",                       (void *)android_os_StatFs_getBlockSize},
+    {"getBlockCount",      "()I",                       (void *)android_os_StatFs_getBlockCount},
+    {"getFreeBlocks",      "()I",                       (void *)android_os_StatFs_getFreeBlocks},
+    {"getAvailableBlocks", "()I",                       (void *)android_os_StatFs_getAvailableBlocks},
+    {"native_setup",       "(Ljava/lang/String;)V",     (void *)android_os_StatFs_native_setup},
+    {"native_finalize",    "()V",                       (void *)android_os_StatFs_native_finalize},
+    {"native_restat",      "(Ljava/lang/String;)V",     (void *)android_os_StatFs_native_restat},
+};
+
+
+int register_android_os_StatFs(JNIEnv *env)
+{
+    jclass clazz;
+
+    clazz = env->FindClass("android/os/StatFs");
+    if (clazz == NULL) {
+        LOGE("Can't find android/os/StatFs");
+        return -1;
+    }
+
+    fields.context = env->GetFieldID(clazz, "mNativeContext", "I");
+    if (fields.context == NULL) {
+        LOGE("Can't find StatFs.mNativeContext");
+        return -1;
+    }
+
+    return AndroidRuntime::registerNativeMethods(env,
+            "android/os/StatFs", gMethods, NELEM(gMethods));
+}
+
+}   // namespace android