Added a utility to create proto from a pbtxt file

mediapipe/tasks/ios/test/vision/utils/BUILD

@@ -9,3 +9,13 @@ objc_library(
     module_name = "MPPImageTestUtils",
     deps = ["//mediapipe/tasks/ios/vision/core:MPPImage"],
 )
+
+cc_library(
+    name = "parse_proto_utils",
+    srcs = ["sources/parse_proto_utils.cc"],
+    hdrs = ["sources/parse_proto_utils.h"],
+    deps = [ 
+        "@com_google_absl//absl/status",  
+        "@com_google_protobuf//:protobuf",
+    ],
+)

mediapipe/tasks/ios/test/vision/utils/sources/parse_proto_utils.cc

@@ -0,0 +1,43 @@
+/* Copyright 2022 The MediaPipe Authors.
+
+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 "mediapipe/tasks/ios/test/vision/utils/sources/parse_proto_utils.h"
+
+#include <fstream>
+#include <sstream>
+#include "google/protobuf/io/zero_copy_stream_impl.h"
+
+namespace mediapipe::tasks::ios::test::vision::utils {
+
+namespace {
+  using ::google::protobuf::TextFormat;
+ }
+
+ absl::Status get_proto_from_pbtxt(const std::string file_path, google::protobuf::Message& proto) {
+    std::ifstream fin(file_path);
+
+    if(!fin.is_open()) return absl::InvalidArgumentError(
+          "Cannot read input file.");
+    
+    std::stringstream strings_stream;
+
+    strings_stream << fin.rdbuf();
+
+    return TextFormat::ParseFromString(strings_stream.str(), &proto) ? absl::OkStatus() : absl::InvalidArgumentError(
+          "Cannot read a valid proto from the input file.");
+
+ }
+
+}  // namespace mediapipe::tasks::text::utils

mediapipe/tasks/ios/test/vision/utils/sources/parse_proto_utils.h

@@ -0,0 +1,28 @@
+/* Copyright 2022 The MediaPipe Authors.
+
+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.
+==============================================================================*/
+
+#ifndef MEDIAPIPE_TASKS_IOS_TEST_VISION_UTILS_H_
+#define MEDIAPIPE_TASKS_IOS_TEST_VISION_UTILS_H_
+
+#include <string>
+
+#include "absl/status/status.h"
+#include "google/protobuf/text_format.h"
+
+namespace mediapipe::tasks::ios::test::vision::utils {
+ absl::Status get_proto_from_pbtxt(const std::string file_path, google::protobuf::Message& proto);
+}  // namespace mediapipe::tasks::ios::test::utils
+
+#endif  // MEDIAPIPE_TASKS_IOS_TEST_VISION_UTILS_H_