1 files changed, 51 insertions, 0 deletions
diff --git a/src/parser.cc b/src/parser.cc
new file mode 100644
index 0000000..745c532
--- /dev/null
+++ b/src/parser.cc
@@ -0,0 +1,51 @@
+// Copyright 2018 Google Inc. 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 "parser.h"
+
+#include "disk_interface.h"
+#include "metrics.h"
+
+bool Parser::Load(const string& filename, string* err, Lexer* parent) {
+  METRIC_RECORD(".ninja parse");
+  string contents;
+  string read_err;
+  if (file_reader_->ReadFile(filename, &contents, &read_err) !=
+      FileReader::Okay) {
+    *err = "loading '" + filename + "': " + read_err;
+    if (parent)
+      parent->Error(string(*err), err);
+    return false;
+  }
+
+  // The lexer needs a nul byte at the end of its input, to know when it's done.
+  // It takes a StringPiece, and StringPiece's string constructor uses
+  // string::data().  data()'s return value isn't guaranteed to be
+  // null-terminated (although in practice - libc++, libstdc++, msvc's stl --
+  // it is, and C++11 demands that too), so add an explicit nul byte.
+  contents.resize(contents.size() + 1);
+
+  return Parse(filename, contents, err);
+}
+
+bool Parser::ExpectToken(Lexer::Token expected, string* err) {
+  Lexer::Token token = lexer_.ReadToken();
+  if (token != expected) {
+    string message = string("expected ") + Lexer::TokenName(expected);
+    message += string(", got ") + Lexer::TokenName(token);
+    message += Lexer::TokenErrorHint(expected);
+    return lexer_.Error(message, err);
+  }
+  return true;
+}