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llvm-mirror/tools/llvm-rc/ResourceScriptParser.cpp
Zachary Turner 1a5684f1d0 [llvm-rc] Use proper search algorithm for finding resources. 
Previously we would only look in the current directory for a
resource, which might not be the same as the directory of the
rc file.  Furthermore, MSVC rc supports a /I option, and can
also look in the system environment.  This patch adds support
for this search algorithm.

Differential Revision: https://reviews.llvm.org/D38740

llvm-svn: 315499
2017-10-11 20:12:09 +00:00

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//===-- ResourceScriptParser.cpp --------------------------------*- C++-*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===---------------------------------------------------------------------===//
//
// This implements the parser defined in ResourceScriptParser.h.
//
//===---------------------------------------------------------------------===//
#include "ResourceScriptParser.h"
#include "llvm/Option/ArgList.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Process.h"
// Take an expression returning llvm::Error and forward the error if it exists.
#define RETURN_IF_ERROR(Expr) \
if (auto Err = (Expr)) \
return std::move(Err);
// Take an expression returning llvm::Expected<T> and assign it to Var or
// forward the error out of the function.
#define ASSIGN_OR_RETURN(Var, Expr) \
auto Var = (Expr); \
if (!Var) \
return Var.takeError();
namespace llvm {
namespace rc {
RCParser::ParserError::ParserError(const Twine &Expected, const LocIter CurLoc,
const LocIter End)
: ErrorLoc(CurLoc), FileEnd(End) {
CurMessage = "Error parsing file: expected " + Expected.str() + ", got " +
(CurLoc == End ? "<EOF>" : CurLoc->value()).str();
}
char RCParser::ParserError::ID = 0;
RCParser::RCParser(std::vector<RCToken> TokenList)
: Tokens(std::move(TokenList)), CurLoc(Tokens.begin()), End(Tokens.end()) {}
bool RCParser::isEof() const { return CurLoc == End; }
RCParser::ParseType RCParser::parseSingleResource() {
// The first thing we read is usually a resource's name. However, in some
// cases (LANGUAGE and STRINGTABLE) the resources don't have their names
// and the first token to be read is the type.
ASSIGN_OR_RETURN(NameToken, readTypeOrName());
if (NameToken->equalsLower("LANGUAGE"))
return parseLanguageResource();
else if (NameToken->equalsLower("STRINGTABLE"))
return parseStringTableResource();
// If it's not an unnamed resource, what we've just read is a name. Now,
// read resource type;
ASSIGN_OR_RETURN(TypeToken, readTypeOrName());
ParseType Result = std::unique_ptr<RCResource>();
(void)!Result;
if (TypeToken->equalsLower("ACCELERATORS"))
Result = parseAcceleratorsResource();
else if (TypeToken->equalsLower("CURSOR"))
Result = parseCursorResource();
else if (TypeToken->equalsLower("DIALOG"))
Result = parseDialogResource(false);
else if (TypeToken->equalsLower("DIALOGEX"))
Result = parseDialogResource(true);
else if (TypeToken->equalsLower("ICON"))
Result = parseIconResource();
else if (TypeToken->equalsLower("HTML"))
Result = parseHTMLResource();
else if (TypeToken->equalsLower("MENU"))
Result = parseMenuResource();
else if (TypeToken->equalsLower("VERSIONINFO"))
Result = parseVersionInfoResource();
else
Result = parseUserDefinedResource(*TypeToken);
if (Result)
(*Result)->setName(*NameToken);
return Result;
}
bool RCParser::isNextTokenKind(Kind TokenKind) const {
return !isEof() && look().kind() == TokenKind;
}
const RCToken &RCParser::look() const {
assert(!isEof());
return *CurLoc;
}
const RCToken &RCParser::read() {
assert(!isEof());
return *CurLoc++;
}
void RCParser::consume() {
assert(!isEof());
CurLoc++;
}
// An integer description might consist of a single integer or
// an arithmetic expression evaluating to the integer. The expressions
// can contain the following tokens: <int> ( ) + - | & ~. Their meaning
// is the same as in C++.
// The operators in the original RC implementation have the following
// precedence:
// 1) Unary operators (- ~),
// 2) Binary operators (+ - & |), with no precedence.
//
// The following grammar is used to parse the expressions Exp1:
// Exp1 ::= Exp2 || Exp1 + Exp2 || Exp1 - Exp2 || Exp1 | Exp2 || Exp1 & Exp2
// Exp2 ::= -Exp2 || ~Exp2 || Int || (Exp1).
// (More conveniently, Exp1 is a non-empty sequence of Exp2 expressions,
// separated by binary operators.)
//
// Expressions of type Exp1 are read by parseIntExpr1(Inner) method, while Exp2
// is read by parseIntExpr2().
//
// The original Microsoft tool handles multiple unary operators incorrectly.
// For example, in 16-bit little-endian integers:
// 1 => 01 00, -1 => ff ff, --1 => ff ff, ---1 => 01 00;
// 1 => 01 00, ~1 => fe ff, ~~1 => fd ff, ~~~1 => fc ff.
// Our implementation differs from the original one and handles these
// operators correctly:
// 1 => 01 00, -1 => ff ff, --1 => 01 00, ---1 => ff ff;
// 1 => 01 00, ~1 => fe ff, ~~1 => 01 00, ~~~1 => fe ff.
Expected<RCInt> RCParser::readInt() { return parseIntExpr1(); }
Expected<RCInt> RCParser::parseIntExpr1() {
// Exp1 ::= Exp2 || Exp1 + Exp2 || Exp1 - Exp2 || Exp1 | Exp2 || Exp1 & Exp2.
ASSIGN_OR_RETURN(FirstResult, parseIntExpr2());
RCInt Result = *FirstResult;
while (!isEof() && look().isBinaryOp()) {
auto OpToken = read();
ASSIGN_OR_RETURN(NextResult, parseIntExpr2());
switch (OpToken.kind()) {
case Kind::Plus:
Result += *NextResult;
break;
case Kind::Minus:
Result -= *NextResult;
break;
case Kind::Pipe:
Result |= *NextResult;
break;
case Kind::Amp:
Result &= *NextResult;
break;
default:
llvm_unreachable("Already processed all binary ops.");
}
}
return Result;
}
Expected<RCInt> RCParser::parseIntExpr2() {
// Exp2 ::= -Exp2 || ~Exp2 || Int || (Exp1).
static const char ErrorMsg[] = "'-', '~', integer or '('";
if (isEof())
return getExpectedError(ErrorMsg);
switch (look().kind()) {
case Kind::Minus: {
consume();
ASSIGN_OR_RETURN(Result, parseIntExpr2());
return -(*Result);
}
case Kind::Tilde: {
consume();
ASSIGN_OR_RETURN(Result, parseIntExpr2());
return ~(*Result);
}
case Kind::Int:
return RCInt(read());
case Kind::LeftParen: {
consume();
ASSIGN_OR_RETURN(Result, parseIntExpr1());
RETURN_IF_ERROR(consumeType(Kind::RightParen));
return *Result;
}
default:
return getExpectedError(ErrorMsg);
}
}
Expected<StringRef> RCParser::readString() {
if (!isNextTokenKind(Kind::String))
return getExpectedError("string");
return read().value();
}
Expected<StringRef> RCParser::readIdentifier() {
if (!isNextTokenKind(Kind::Identifier))
return getExpectedError("identifier");
return read().value();
}
Expected<IntOrString> RCParser::readIntOrString() {
if (!isNextTokenKind(Kind::Int) && !isNextTokenKind(Kind::String))
return getExpectedError("int or string");
return IntOrString(read());
}
Expected<IntOrString> RCParser::readTypeOrName() {
// We suggest that the correct resource name or type should be either an
// identifier or an integer. The original RC tool is much more liberal.
if (!isNextTokenKind(Kind::Identifier) && !isNextTokenKind(Kind::Int))
return getExpectedError("int or identifier");
return IntOrString(read());
}
Error RCParser::consumeType(Kind TokenKind) {
if (isNextTokenKind(TokenKind)) {
consume();
return Error::success();
}
switch (TokenKind) {
#define TOKEN(TokenName) \
case Kind::TokenName: \
return getExpectedError(#TokenName);
#define SHORT_TOKEN(TokenName, TokenCh) \
case Kind::TokenName: \
return getExpectedError(#TokenCh);
#include "ResourceScriptTokenList.h"
#undef SHORT_TOKEN
#undef TOKEN
}
llvm_unreachable("All case options exhausted.");
}
bool RCParser::consumeOptionalType(Kind TokenKind) {
if (isNextTokenKind(TokenKind)) {
consume();
return true;
}
return false;
}
Expected<SmallVector<RCInt, 8>> RCParser::readIntsWithCommas(size_t MinCount,
size_t MaxCount) {
assert(MinCount <= MaxCount);
SmallVector<RCInt, 8> Result;
auto FailureHandler =
[&](llvm::Error Err) -> Expected<SmallVector<RCInt, 8>> {
if (Result.size() < MinCount)
return std::move(Err);
consumeError(std::move(Err));
return Result;
};
for (size_t i = 0; i < MaxCount; ++i) {
// Try to read a comma unless we read the first token.
// Sometimes RC tool requires them and sometimes not. We decide to
// always require them.
if (i >= 1) {
if (auto CommaError = consumeType(Kind::Comma))
return FailureHandler(std::move(CommaError));
}
if (auto IntResult = readInt())
Result.push_back(*IntResult);
else
return FailureHandler(IntResult.takeError());
}
return std::move(Result);
}
Expected<uint32_t> RCParser::parseFlags(ArrayRef<StringRef> FlagDesc,
ArrayRef<uint32_t> FlagValues) {
assert(!FlagDesc.empty());
assert(FlagDesc.size() == FlagValues.size());
uint32_t Result = 0;
while (isNextTokenKind(Kind::Comma)) {
consume();
ASSIGN_OR_RETURN(FlagResult, readIdentifier());
bool FoundFlag = false;
for (size_t FlagId = 0; FlagId < FlagDesc.size(); ++FlagId) {
if (!FlagResult->equals_lower(FlagDesc[FlagId]))
continue;
Result |= FlagValues[FlagId];
FoundFlag = true;
break;
}
if (!FoundFlag)
return getExpectedError(join(FlagDesc, "/"), true);
}
return Result;
}
Expected<OptionalStmtList>
RCParser::parseOptionalStatements(OptStmtType StmtsType) {
OptionalStmtList Result;
// The last statement is always followed by the start of the block.
while (!isNextTokenKind(Kind::BlockBegin)) {
ASSIGN_OR_RETURN(SingleParse, parseSingleOptionalStatement(StmtsType));
Result.addStmt(std::move(*SingleParse));
}
return std::move(Result);
}
Expected<std::unique_ptr<OptionalStmt>>
RCParser::parseSingleOptionalStatement(OptStmtType StmtsType) {
ASSIGN_OR_RETURN(TypeToken, readIdentifier());
if (TypeToken->equals_lower("CHARACTERISTICS"))
return parseCharacteristicsStmt();
if (TypeToken->equals_lower("LANGUAGE"))
return parseLanguageStmt();
if (TypeToken->equals_lower("VERSION"))
return parseVersionStmt();
if (StmtsType != OptStmtType::BasicStmt) {
if (TypeToken->equals_lower("CAPTION"))
return parseCaptionStmt();
if (TypeToken->equals_lower("FONT"))
return parseFontStmt(StmtsType);
if (TypeToken->equals_lower("STYLE"))
return parseStyleStmt();
}
return getExpectedError("optional statement type, BEGIN or '{'",
/* IsAlreadyRead = */ true);
}
RCParser::ParseType RCParser::parseLanguageResource() {
// Read LANGUAGE as an optional statement. If it's read correctly, we can
// upcast it to RCResource.
return parseLanguageStmt();
}
RCParser::ParseType RCParser::parseAcceleratorsResource() {
ASSIGN_OR_RETURN(OptStatements, parseOptionalStatements());
RETURN_IF_ERROR(consumeType(Kind::BlockBegin));
auto Accels =
llvm::make_unique<AcceleratorsResource>(std::move(*OptStatements));
while (!consumeOptionalType(Kind::BlockEnd)) {
ASSIGN_OR_RETURN(EventResult, readIntOrString());
RETURN_IF_ERROR(consumeType(Kind::Comma));
ASSIGN_OR_RETURN(IDResult, readInt());
ASSIGN_OR_RETURN(
FlagsResult,
parseFlags(AcceleratorsResource::Accelerator::OptionsStr,
AcceleratorsResource::Accelerator::OptionsFlags));
Accels->addAccelerator(*EventResult, *IDResult, *FlagsResult);
}
return std::move(Accels);
}
RCParser::ParseType RCParser::parseCursorResource() {
ASSIGN_OR_RETURN(Arg, readString());
return llvm::make_unique<CursorResource>(*Arg);
}
RCParser::ParseType RCParser::parseDialogResource(bool IsExtended) {
// Dialog resources have the following format of the arguments:
// DIALOG: x, y, width, height [opt stmts...] {controls...}
// DIALOGEX: x, y, width, height [, helpID] [opt stmts...] {controls...}
// These are very similar, so we parse them together.
ASSIGN_OR_RETURN(LocResult, readIntsWithCommas(4, 4));
uint32_t HelpID = 0; // When HelpID is unset, it's assumed to be 0.
if (IsExtended && consumeOptionalType(Kind::Comma)) {
ASSIGN_OR_RETURN(HelpIDResult, readInt());
HelpID = *HelpIDResult;
}
ASSIGN_OR_RETURN(OptStatements, parseOptionalStatements(
IsExtended ? OptStmtType::DialogExStmt
: OptStmtType::DialogStmt));
assert(isNextTokenKind(Kind::BlockBegin) &&
"parseOptionalStatements, when successful, halts on BlockBegin.");
consume();
auto Dialog = llvm::make_unique<DialogResource>(
(*LocResult)[0], (*LocResult)[1], (*LocResult)[2], (*LocResult)[3],
HelpID, std::move(*OptStatements), IsExtended);
while (!consumeOptionalType(Kind::BlockEnd)) {
ASSIGN_OR_RETURN(ControlDefResult, parseControl());
Dialog->addControl(std::move(*ControlDefResult));
}
return std::move(Dialog);
}
RCParser::ParseType RCParser::parseUserDefinedResource(IntOrString Type) {
if (isEof())
return getExpectedError("filename, '{' or BEGIN");
// Check if this is a file resource.
if (look().kind() == Kind::String)
return llvm::make_unique<UserDefinedResource>(Type, read().value());
RETURN_IF_ERROR(consumeType(Kind::BlockBegin));
std::vector<IntOrString> Data;
// Consume comma before each consecutive token except the first one.
bool ConsumeComma = false;
while (!consumeOptionalType(Kind::BlockEnd)) {
if (ConsumeComma)
RETURN_IF_ERROR(consumeType(Kind::Comma));
ConsumeComma = true;
ASSIGN_OR_RETURN(Item, readIntOrString());
Data.push_back(*Item);
}
return llvm::make_unique<UserDefinedResource>(Type, std::move(Data));
}
RCParser::ParseType RCParser::parseVersionInfoResource() {
ASSIGN_OR_RETURN(FixedResult, parseVersionInfoFixed());
ASSIGN_OR_RETURN(BlockResult, parseVersionInfoBlockContents(StringRef()));
return llvm::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:
// [class] text, id, x, y, width, height [, style] [, exstyle] [, helpID]
// [class] id, x, y, width, height [, style] [, exstyle] [, helpID]
// Note that control ids must be integers.
// Text might be either a string or an integer pointing to resource ID.
ASSIGN_OR_RETURN(ClassResult, readIdentifier());
std::string ClassUpper = ClassResult->upper();
auto CtlInfo = Control::SupportedCtls.find(ClassUpper);
if (CtlInfo == Control::SupportedCtls.end())
return getExpectedError("control type, END or '}'", true);
// Read caption if necessary.
IntOrString Caption{StringRef()};
if (CtlInfo->getValue().HasTitle) {
ASSIGN_OR_RETURN(CaptionResult, readIntOrString());
RETURN_IF_ERROR(consumeType(Kind::Comma));
Caption = *CaptionResult;
}
ASSIGN_OR_RETURN(Args, readIntsWithCommas(5, 8));
auto TakeOptArg = [&Args](size_t Id) -> Optional<uint32_t> {
return Args->size() > Id ? (uint32_t)(*Args)[Id] : Optional<uint32_t>();
};
return Control(*ClassResult, Caption, (*Args)[0], (*Args)[1], (*Args)[2],
(*Args)[3], (*Args)[4], TakeOptArg(5), TakeOptArg(6),
TakeOptArg(7));
}
RCParser::ParseType RCParser::parseIconResource() {
ASSIGN_OR_RETURN(Arg, readString());
return llvm::make_unique<IconResource>(*Arg);
}
RCParser::ParseType RCParser::parseHTMLResource() {
ASSIGN_OR_RETURN(Arg, readString());
return llvm::make_unique<HTMLResource>(*Arg);
}
RCParser::ParseType RCParser::parseMenuResource() {
ASSIGN_OR_RETURN(OptStatements, parseOptionalStatements());
ASSIGN_OR_RETURN(Items, parseMenuItemsList());
return llvm::make_unique<MenuResource>(std::move(*OptStatements),
std::move(*Items));
}
Expected<MenuDefinitionList> RCParser::parseMenuItemsList() {
RETURN_IF_ERROR(consumeType(Kind::BlockBegin));
MenuDefinitionList List;
// Read a set of items. Each item is of one of three kinds:
// MENUITEM SEPARATOR
// MENUITEM caption:String, result:Int [, menu flags]...
// POPUP caption:String [, menu flags]... { items... }
while (!consumeOptionalType(Kind::BlockEnd)) {
ASSIGN_OR_RETURN(ItemTypeResult, readIdentifier());
bool IsMenuItem = ItemTypeResult->equals_lower("MENUITEM");
bool IsPopup = ItemTypeResult->equals_lower("POPUP");
if (!IsMenuItem && !IsPopup)
return getExpectedError("MENUITEM, POPUP, END or '}'", true);
if (IsMenuItem && isNextTokenKind(Kind::Identifier)) {
// Now, expecting SEPARATOR.
ASSIGN_OR_RETURN(SeparatorResult, readIdentifier());
if (SeparatorResult->equals_lower("SEPARATOR")) {
List.addDefinition(llvm::make_unique<MenuSeparator>());
continue;
}
return getExpectedError("SEPARATOR or string", true);
}
// Not a separator. Read the caption.
ASSIGN_OR_RETURN(CaptionResult, readString());
// If MENUITEM, expect also a comma and an integer.
uint32_t MenuResult = -1;
if (IsMenuItem) {
RETURN_IF_ERROR(consumeType(Kind::Comma));
ASSIGN_OR_RETURN(IntResult, readInt());
MenuResult = *IntResult;
}
ASSIGN_OR_RETURN(FlagsResult, parseFlags(MenuDefinition::OptionsStr,
MenuDefinition::OptionsFlags));
if (IsPopup) {
// If POPUP, read submenu items recursively.
ASSIGN_OR_RETURN(SubMenuResult, parseMenuItemsList());
List.addDefinition(llvm::make_unique<PopupItem>(
*CaptionResult, *FlagsResult, std::move(*SubMenuResult)));
continue;
}
assert(IsMenuItem);
List.addDefinition(
llvm::make_unique<MenuItem>(*CaptionResult, MenuResult, *FlagsResult));
}
return std::move(List);
}
RCParser::ParseType RCParser::parseStringTableResource() {
ASSIGN_OR_RETURN(OptStatements, parseOptionalStatements());
RETURN_IF_ERROR(consumeType(Kind::BlockBegin));
auto Table =
llvm::make_unique<StringTableResource>(std::move(*OptStatements));
// Read strings until we reach the end of the block.
while (!consumeOptionalType(Kind::BlockEnd)) {
// Each definition consists of string's ID (an integer) and a string.
// Some examples in documentation suggest that there might be a comma in
// between, however we strictly adhere to the single statement definition.
ASSIGN_OR_RETURN(IDResult, readInt());
ASSIGN_OR_RETURN(StrResult, readString());
Table->addString(*IDResult, *StrResult);
}
return std::move(Table);
}
Expected<std::unique_ptr<VersionInfoBlock>>
RCParser::parseVersionInfoBlockContents(StringRef BlockName) {
RETURN_IF_ERROR(consumeType(Kind::BlockBegin));
auto Contents = llvm::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 non-empty list of strings and/or ints, each
// possibly preceded by a comma. Unfortunately, the tool behavior depends
// on them existing or not, so we need to memorize where we found them.
std::vector<IntOrString> Values;
std::vector<bool> PrecedingCommas;
RETURN_IF_ERROR(consumeType(Kind::Comma));
while (!isNextTokenKind(Kind::Identifier) &&
!isNextTokenKind(Kind::BlockEnd)) {
// Try to eat a comma if it's not the first statement.
bool HadComma = Values.size() > 0 && consumeOptionalType(Kind::Comma);
ASSIGN_OR_RETURN(ValueResult, readIntOrString());
Values.push_back(*ValueResult);
PrecedingCommas.push_back(HadComma);
}
return llvm::make_unique<VersionInfoValue>(*KeyResult, std::move(Values),
std::move(PrecedingCommas));
}
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));
SmallVector<uint32_t, 4> ArgInts(ArgsResult->begin(), ArgsResult->end());
Result.setValue(FixedType, ArgInts);
}
return Result;
}
RCParser::ParseOptionType RCParser::parseLanguageStmt() {
ASSIGN_OR_RETURN(Args, readIntsWithCommas(/* min = */ 2, /* max = */ 2));
return llvm::make_unique<LanguageResource>((*Args)[0], (*Args)[1]);
}
RCParser::ParseOptionType RCParser::parseCharacteristicsStmt() {
ASSIGN_OR_RETURN(Arg, readInt());
return llvm::make_unique<CharacteristicsStmt>(*Arg);
}
RCParser::ParseOptionType RCParser::parseVersionStmt() {
ASSIGN_OR_RETURN(Arg, readInt());
return llvm::make_unique<VersionStmt>(*Arg);
}
RCParser::ParseOptionType RCParser::parseCaptionStmt() {
ASSIGN_OR_RETURN(Arg, readString());
return llvm::make_unique<CaptionStmt>(*Arg);
}
RCParser::ParseOptionType RCParser::parseFontStmt(OptStmtType DialogType) {
assert(DialogType != OptStmtType::BasicStmt);
ASSIGN_OR_RETURN(SizeResult, readInt());
RETURN_IF_ERROR(consumeType(Kind::Comma));
ASSIGN_OR_RETURN(NameResult, readString());
// Default values for the optional arguments.
uint32_t FontWeight = 0;
bool FontItalic = false;
uint32_t FontCharset = 1;
if (DialogType == OptStmtType::DialogExStmt) {
if (consumeOptionalType(Kind::Comma)) {
ASSIGN_OR_RETURN(Args, readIntsWithCommas(/* min = */ 0, /* max = */ 3));
if (Args->size() >= 1)
FontWeight = (*Args)[0];
if (Args->size() >= 2)
FontItalic = (*Args)[1] != 0;
if (Args->size() >= 3)
FontCharset = (*Args)[2];
}
}
return llvm::make_unique<FontStmt>(*SizeResult, *NameResult, FontWeight,
FontItalic, FontCharset);
}
RCParser::ParseOptionType RCParser::parseStyleStmt() {
ASSIGN_OR_RETURN(Arg, readInt());
return llvm::make_unique<StyleStmt>(*Arg);
}
Error RCParser::getExpectedError(const Twine &Message, bool IsAlreadyRead) {
return make_error<ParserError>(
Message, IsAlreadyRead ? std::prev(CurLoc) : CurLoc, End);
}
} // namespace rc
} // namespace llvm
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