add antlr source code and ReadMe

[toc] / antlr4-cpp-runtime-4.9.2-source / runtime / src / ListTokenSource.cpp

diff --git a/antlr4-cpp-runtime-4.9.2-source/runtime/src/ListTokenSource.cpp b/antlr4-cpp-runtime-4.9.2-source/runtime/src/ListTokenSource.cpp
new file mode 100644 (file)
index 0000000..ec93cb9
--- /dev/null
+++ b/antlr4-cpp-runtime-4.9.2-source/runtime/src/ListTokenSource.cpp
@@ -0,0 +1,92 @@
+/* Copyright (c) 2012-2017 The ANTLR Project. All rights reserved.
+ * Use of this file is governed by the BSD 3-clause license that
+ * can be found in the LICENSE.txt file in the project root.
+ */
+
+#include "Token.h"
+#include "CommonToken.h"
+#include "CharStream.h"
+
+#include "ListTokenSource.h"
+
+using namespace antlr4;
+
+ListTokenSource::ListTokenSource(std::vector<std::unique_ptr<Token>> tokens_) : ListTokenSource(std::move(tokens_), "") {
+}
+
+ListTokenSource::ListTokenSource(std::vector<std::unique_ptr<Token>> tokens_, const std::string &sourceName_)
+  : tokens(std::move(tokens_)), sourceName(sourceName_) {
+  InitializeInstanceFields();
+  if (tokens.empty()) {
+    throw "tokens cannot be null";
+  }
+
+  // Check if there is an eof token and create one if not.
+  if (tokens.back()->getType() != Token::EOF) {
+    Token *lastToken = tokens.back().get();
+    size_t start = INVALID_INDEX;
+    size_t previousStop = lastToken->getStopIndex();
+    if (previousStop != INVALID_INDEX) {
+      start = previousStop + 1;
+    }
+
+    size_t stop = std::max(INVALID_INDEX, start - 1);
+    tokens.emplace_back((_factory->create({ this, getInputStream() }, Token::EOF, "EOF",
+      Token::DEFAULT_CHANNEL, start, stop, static_cast<int>(lastToken->getLine()), lastToken->getCharPositionInLine())));
+  }
+}
+
+size_t ListTokenSource::getCharPositionInLine() {
+  if (i < tokens.size()) {
+    return tokens[i]->getCharPositionInLine();
+  }
+  return 0;
+}
+
+std::unique_ptr<Token> ListTokenSource::nextToken() {
+  if (i < tokens.size()) {
+    return std::move(tokens[i++]);
+  }
+  return nullptr;
+}
+
+size_t ListTokenSource::getLine() const {
+  if (i < tokens.size()) {
+    return tokens[i]->getLine();
+  }
+
+  return 1;
+}
+
+CharStream *ListTokenSource::getInputStream() {
+  if (i < tokens.size()) {
+    return tokens[i]->getInputStream();
+  } else if (!tokens.empty()) {
+    return tokens.back()->getInputStream();
+  }
+
+  // no input stream information is available
+  return nullptr;
+}
+
+std::string ListTokenSource::getSourceName() {
+  if (sourceName != "") {
+    return sourceName;
+  }
+
+  CharStream *inputStream = getInputStream();
+  if (inputStream != nullptr) {
+    return inputStream->getSourceName();
+  }
+
+  return "List";
+}
+
+TokenFactory<CommonToken>* ListTokenSource::getTokenFactory() {
+  return _factory;
+}
+
+void ListTokenSource::InitializeInstanceFields() {
+  i = 0;
+  _factory = CommonTokenFactory::DEFAULT.get();
+}