First Commit

3rdparty/shaderc/glslc/src/file_includer.cc

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+// Copyright 2015 The Shaderc Authors. All rights reserved.
+//
+// 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 "file_includer.h"
+
+#include <mutex>
+#include <utility>
+
+#include "libshaderc_util/io_shaderc.h"
+
+namespace glslc {
+
+shaderc_include_result* MakeErrorIncludeResult(const char* message) {
+  return new shaderc_include_result{"", 0, message, strlen(message)};
+}
+
+FileIncluder::~FileIncluder() = default;
+
+shaderc_include_result* FileIncluder::GetInclude(
+    const char* requested_source, shaderc_include_type include_type,
+    const char* requesting_source, size_t) {
+
+  const std::string full_path =
+      (include_type == shaderc_include_type_relative)
+          ? file_finder_.FindRelativeReadableFilepath(requesting_source,
+                                                      requested_source)
+          : file_finder_.FindReadableFilepath(requested_source);
+
+  if (full_path.empty())
+    return MakeErrorIncludeResult("Cannot find or open include file.");
+
+  // In principle, several threads could be resolving includes at the same
+  // time.  Protect the included_files.
+
+  // Read the file and save its full path and contents into stable addresses.
+  FileInfo* new_file_info = new FileInfo{full_path, {}};
+  if (!shaderc_util::ReadFile(full_path, &(new_file_info->contents))) {
+    return MakeErrorIncludeResult("Cannot read file");
+  }
+
+  included_files_.insert(full_path);
+
+  return new shaderc_include_result{
+      new_file_info->full_path.data(), new_file_info->full_path.length(),
+      new_file_info->contents.data(), new_file_info->contents.size(),
+      new_file_info};
+}
+
+void FileIncluder::ReleaseInclude(shaderc_include_result* include_result) {
+  FileInfo* info = static_cast<FileInfo*>(include_result->user_data);
+  delete info;
+  delete include_result;
+}
+
+}  // namespace glslc