From fb74cb1edfa64424fb5204d10a16892f972435ed Mon Sep 17 00:00:00 2001
From: Marek Sokolowski <mnbvmar@gmail.com>
Date: Thu, 28 Sep 2017 22:41:38 +0000
Subject: [llvm-rc] Add VERSIONINFO parsing ability. [6/8]

This extends the set of llvm-rc parser's available resources by
another one, VERSIONINFO.

Ref: msdn.microsoft.com/en-us/library/windows/desktop/aa381058.aspx

Thanks to Nico Weber for his original work in this area.

Differential Revision: https://reviews.llvm.org/D37021

llvm-svn: 314468
---
 llvm/tools/llvm-rc/ResourceScriptParser.cpp | 75 +++++++++++++++++++++++++++++
 1 file changed, 75 insertions(+)

(limited to 'llvm/tools/llvm-rc/ResourceScriptParser.cpp')

diff --git a/llvm/tools/llvm-rc/ResourceScriptParser.cpp b/llvm/tools/llvm-rc/ResourceScriptParser.cpp
index 41b11911b06..57a30d14371 100644
--- a/llvm/tools/llvm-rc/ResourceScriptParser.cpp
+++ b/llvm/tools/llvm-rc/ResourceScriptParser.cpp
@@ -77,6 +77,8 @@ RCParser::ParseType RCParser::parseSingleResource() {
     Result = parseHTMLResource();
   else if (TypeToken->equalsLower("MENU"))
     Result = parseMenuResource();
+  else if (TypeToken->equalsLower("VERSIONINFO"))
+    Result = parseVersionInfoResource();
   else
     return getExpectedError("resource type", /* IsAlreadyRead = */ true);
 
@@ -322,6 +324,13 @@ RCParser::ParseType RCParser::parseDialogResource(bool IsExtended) {
   return std::move(Dialog);
 }
 
+RCParser::ParseType RCParser::parseVersionInfoResource() {
+  ASSIGN_OR_RETURN(FixedResult, parseVersionInfoFixed());
+  ASSIGN_OR_RETURN(BlockResult, parseVersionInfoBlockContents(StringRef()));
+  return make_unique<VersionInfoResource>(std::move(**BlockResult),
+                                          std::move(*FixedResult));
+}
+
 Expected<Control> RCParser::parseControl() {
   // Each control definition (except CONTROL) follows one of the schemes below
   // depending on the control class:
@@ -446,6 +455,72 @@ RCParser::ParseType RCParser::parseStringTableResource() {
   return std::move(Table);
 }
 
+Expected<std::unique_ptr<VersionInfoBlock>>
+RCParser::parseVersionInfoBlockContents(StringRef BlockName) {
+  RETURN_IF_ERROR(consumeType(Kind::BlockBegin));
+
+  auto Contents = make_unique<VersionInfoBlock>(BlockName);
+
+  while (!isNextTokenKind(Kind::BlockEnd)) {
+    ASSIGN_OR_RETURN(Stmt, parseVersionInfoStmt());
+    Contents->addStmt(std::move(*Stmt));
+  }
+
+  consume(); // Consume BlockEnd.
+
+  return std::move(Contents);
+}
+
+Expected<std::unique_ptr<VersionInfoStmt>> RCParser::parseVersionInfoStmt() {
+  // Expect either BLOCK or VALUE, then a name or a key (a string).
+  ASSIGN_OR_RETURN(TypeResult, readIdentifier());
+
+  if (TypeResult->equals_lower("BLOCK")) {
+    ASSIGN_OR_RETURN(NameResult, readString());
+    return parseVersionInfoBlockContents(*NameResult);
+  }
+
+  if (TypeResult->equals_lower("VALUE")) {
+    ASSIGN_OR_RETURN(KeyResult, readString());
+    // Read a (possibly empty) list of strings and/or ints, each preceded by
+    // a comma.
+    std::vector<IntOrString> Values;
+
+    while (consumeOptionalType(Kind::Comma)) {
+      ASSIGN_OR_RETURN(ValueResult, readIntOrString());
+      Values.push_back(*ValueResult);
+    }
+    return make_unique<VersionInfoValue>(*KeyResult, std::move(Values));
+  }
+
+  return getExpectedError("BLOCK or VALUE", true);
+}
+
+Expected<VersionInfoResource::VersionInfoFixed>
+RCParser::parseVersionInfoFixed() {
+  using RetType = VersionInfoResource::VersionInfoFixed;
+  RetType Result;
+
+  // Read until the beginning of the block.
+  while (!isNextTokenKind(Kind::BlockBegin)) {
+    ASSIGN_OR_RETURN(TypeResult, readIdentifier());
+    auto FixedType = RetType::getFixedType(*TypeResult);
+
+    if (!RetType::isTypeSupported(FixedType))
+      return getExpectedError("fixed VERSIONINFO statement type", true);
+    if (Result.IsTypePresent[FixedType])
+      return getExpectedError("yet unread fixed VERSIONINFO statement type",
+                              true);
+
+    // VERSION variations take multiple integers.
+    size_t NumInts = RetType::isVersionType(FixedType) ? 4 : 1;
+    ASSIGN_OR_RETURN(ArgsResult, readIntsWithCommas(NumInts, NumInts));
+    Result.setValue(FixedType, *ArgsResult);
+  }
+
+  return Result;
+}
+
 RCParser::ParseOptionType RCParser::parseLanguageStmt() {
   ASSIGN_OR_RETURN(Args, readIntsWithCommas(/* min = */ 2, /* max = */ 2));
   return make_unique<LanguageResource>((*Args)[0], (*Args)[1]);
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