!112 Decouple the ohos code of drivers based on the Pegasus architecture

Merge pull request !112 from zk/master

file/BUILD.gn

@@ -19,7 +19,15 @@ static_library("native_file") {
     "//commonlibrary/utils_lite/include",
     "//commonlibrary/utils_lite/hals/file",
   ]
-  deps = [ "$ohos_board_adapter_dir/hals/utils/file:hal_file_static" ]
+  BOARD_DRIVER_HAL_FILE_PATH =
+      rebase_path("//${ohos_board_adapter_dir}/hals/utils/file")
+  cmd = "if [ -f ${BOARD_DRIVER_HAL_FILE_PATH}/BUILD.gn ]; then echo true; else echo false; fi"
+  BOARD_DRIVER_HAL_FILE_PATH_EXISTS =
+      exec_script("//build/lite/run_shell_cmd.py", [ cmd ], "value")
+  if (BOARD_DRIVER_HAL_FILE_PATH_EXISTS) {
+    deps = [ "$ohos_board_adapter_dir/hals/utils/file:hal_file_static" ]
+  }
+  deps += [ "//commonlibrary/utils_lite/hals/file:static_hal_file" ]
 }
 
 lite_component("file") {

hals/file/BUILD.gn

@@ -0,0 +1,23 @@
+# Copyright (c) 2022 Huawei Device Co., Ltd.
+# 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.
+
+import("//build/ohos.gni")
+
+ohos_static_library("static_hal_file") {
+  sources = [ "hal_file.c" ]
+
+  include_dirs = [
+    "//commonlibrary/utils_lite/include",
+    "//commonlibrary/utils_lite/hals/file",
+  ]
+}

hals/file/hal_file.c

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2022 Huawei Device Co., Ltd.
+ * 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.
+ */
+#include <fcntl.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+#include "hal_file.h"
+
+__attribute__((weak)) int HalFileOpen(const char *path, int oflag, int mode)
+{
+    (void)mode;
+    return open(path, oflag);
+}
+
+__attribute__((weak)) int HalFileClose(int fd)
+{
+    return close(fd);
+}
+
+__attribute__((weak)) int HalFileRead(int fd, char *buf, unsigned int len)
+{
+    return read(fd, buf, len);
+}
+
+__attribute__((weak)) int HalFileWrite(int fd, const char *buf, unsigned int len)
+{
+    return write(fd, buf, len);
+}
+
+__attribute__((weak)) int HalFileDelete(const char *path)
+{
+    return unlink(path);
+}
+
+__attribute__((weak)) int HalFileStat(const char *path, unsigned int *fileSize)
+{
+    struct stat info = { 0 };
+    int ret = stat(path, &info);
+    if (ret < 0) {
+        return ret;
+    } else {
+        return info.st_size;
+    }
+}
+
+__attribute__((weak)) int HalFileSeek(int fd, int offset, unsigned int whence)
+{
+    return lseek(fd, offset, whence);
+}