From 840e252b72c0891d2173157e9331049568144cbe Mon Sep 17 00:00:00 2001
From: roynatech2544 <whiteshell2544@naver.com>
Date: Mon, 3 Oct 2022 18:15:32 +0900
Subject: [PATCH] universal7885: hidl: Introduce simple fileio lib

---
 .../parts/hardware/libfileio/Android.bp       |  7 +++
 .../parts/hardware/libfileio/FileIO.cpp       | 48 +++++++++++++++++++
 .../parts/hardware/libfileio/include/FileIO.h |  6 +++
 3 files changed, 61 insertions(+)
 create mode 100644 universal7885-common/hidl-packages/parts/hardware/libfileio/Android.bp
 create mode 100644 universal7885-common/hidl-packages/parts/hardware/libfileio/FileIO.cpp
 create mode 100644 universal7885-common/hidl-packages/parts/hardware/libfileio/include/FileIO.h

diff --git a/universal7885-common/hidl-packages/parts/hardware/libfileio/Android.bp b/universal7885-common/hidl-packages/parts/hardware/libfileio/Android.bp
new file mode 100644
index 0000000..035ee69
--- /dev/null
+++ b/universal7885-common/hidl-packages/parts/hardware/libfileio/Android.bp
@@ -0,0 +1,7 @@
+cc_library_shared {
+   name: "libfileio",
+   srcs: ["FileIO.cpp"],
+   include_dirs: ["include"],
+   export_include_dirs: ["include"],
+}
+   
diff --git a/universal7885-common/hidl-packages/parts/hardware/libfileio/FileIO.cpp b/universal7885-common/hidl-packages/parts/hardware/libfileio/FileIO.cpp
new file mode 100644
index 0000000..b97e8cb
--- /dev/null
+++ b/universal7885-common/hidl-packages/parts/hardware/libfileio/FileIO.cpp
@@ -0,0 +1,48 @@
+#define LOG_TAG "libFileIO"
+
+#include <log/log.h>
+
+#include <fstream>
+#include <memory>
+#include <string>
+
+namespace FileIO {
+
+constexpr const int EXIT_ERR = -1;
+
+int readline(const char *path) {
+  std::ifstream file;
+  std::string value;
+  file.open(path);
+  ALOGD("%s: Opening %s", __func__, path);
+  if (file.is_open()) {
+    getline(file, value);
+    file.close();
+  } else {
+    ALOGE("%s: Failed to open %s", __func__, path);
+    return EXIT_ERR;
+  }
+  try {
+    return stoi(value);
+  } catch (std::invalid_argument const &ex) {
+    ALOGE("%s: stoi(): invalid argument: for %s", __func__, value);
+  } catch (std::out_of_range const &ex) {
+    ALOGE("%s: stoi(): out of range: for %s", __func__, value);
+  }
+  return EXIT_ERR;
+}
+
+template <typename T>
+void writeline(const char *path, const T data) {
+  std::ofstream file;
+  file.open(path);
+  ALOGD("%s: Opening %s", __func__, path);
+  if (file.is_open()) {
+    file << data;
+    file.close();
+    return;
+  }
+  ALOGE("%s: Failed to open %s", __func__, path);
+}
+
+} // namespace FileIO
diff --git a/universal7885-common/hidl-packages/parts/hardware/libfileio/include/FileIO.h b/universal7885-common/hidl-packages/parts/hardware/libfileio/include/FileIO.h
new file mode 100644
index 0000000..466c237
--- /dev/null
+++ b/universal7885-common/hidl-packages/parts/hardware/libfileio/include/FileIO.h
@@ -0,0 +1,6 @@
+namespace FileIO {
+  int readline(const char *path);
+
+  template <typename T>
+  void writeline(const char *path, const T data);
+} // namespace FileIO