1 files changed, 109 insertions, 0 deletions
diff --git a/drm/common/ReadWriteUtils.cpp b/drm/common/ReadWriteUtils.cpp
new file mode 100644
index 0000000..7ec4fa2
--- /dev/null
+++ b/drm/common/ReadWriteUtils.cpp
@@ -0,0 +1,109 @@
+/*
+ * Copyright (C) 2010 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.
+ */
+
+//#define LOG_NDEBUG 0
+#define LOG_TAG "ReadWriteUtils"
+#include <utils/Log.h>
+
+#include <ReadWriteUtils.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <fcntl.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <utils/String8.h>
+
+using namespace android;
+
+#define FAILURE -1
+
+String8 ReadWriteUtils::readBytes(const String8& filePath) {
+    FILE* file = NULL;
+    file = fopen(filePath.string(), "r");
+
+    String8 string("");
+    if (NULL != file) {
+        int fd = fileno(file);
+        struct stat sb;
+
+        if (fstat(fd, &sb) == 0 && sb.st_size > 0) {
+            int length = sb.st_size;
+            char* bytes = new char[length];
+            if (length == read(fd, (void*) bytes, length)) {
+                string.append(bytes, length);
+            }
+            delete bytes;
+        }
+        fclose(file);
+    }
+    return string;
+}
+
+int ReadWriteUtils::readBytes(const String8& filePath, char** buffer) {
+    FILE* file = NULL;
+    file = fopen(filePath.string(), "r");
+    int length = 0;
+
+    if (NULL != file) {
+        int fd = fileno(file);
+        struct stat sb;
+
+        if (fstat(fd, &sb) == 0 && sb.st_size > 0) {
+            length = sb.st_size;
+            *buffer = new char[length];
+            if (length != read(fd, (void*) *buffer, length)) {
+                length = FAILURE;
+            }
+        }
+        fclose(file);
+    }
+    return length;
+}
+
+void ReadWriteUtils::writeToFile(const String8& filePath, const String8& data) {
+    FILE* file = NULL;
+    file = fopen(filePath.string(), "w+");
+
+    if (NULL != file) {
+        int fd = fileno(file);
+
+        int size = data.size();
+        if (FAILURE != ftruncate(fd, size)) {
+            if (size != write(fd, data.string(), size)) {
+                LOGE("Failed to write the data to: %s", filePath.string());
+            }
+        }
+        fclose(file);
+    }
+}
+
+void ReadWriteUtils::appendToFile(const String8& filePath, const String8& data) {
+    FILE* file = NULL;
+    file = fopen(filePath.string(), "a+");
+
+    if (NULL != file) {
+        int fd = fileno(file);
+
+        int size = data.size();
+        if (size != write(fd, data.string(), size)) {
+            LOGE("Failed to write the data to: %s", filePath.string());
+        }
+        fclose(file);
+    }
+}
+