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llvm-mirror/tools/llvm-rc/ResourceFileWriter.cpp
Martin Storsjö 7b4e9362ee [llvm-rc] Update a comment. NFC. 
Fix a typo and mention one missing step.
2020-09-16 09:34:26 +03:00

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//===-- ResourceFileWriter.cpp --------------------------------*- C++-*-===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===---------------------------------------------------------------------===//
//
// This implements the visitor serializing resources to a .res stream.
//
//===---------------------------------------------------------------------===//
#include "ResourceFileWriter.h"
#include "llvm/Object/WindowsResource.h"
#include "llvm/Support/ConvertUTF.h"
#include "llvm/Support/Endian.h"
#include "llvm/Support/EndianStream.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/Path.h"
#include "llvm/Support/Process.h"
using namespace llvm::support;
// Take an expression returning llvm::Error and forward the error if it exists.
#define RETURN_IF_ERROR(Expr) \
if (auto Err = (Expr)) \
return Err;
namespace llvm {
namespace rc {
// Class that employs RAII to save the current FileWriter object state
// and revert to it as soon as we leave the scope. This is useful if resources
// declare their own resource-local statements.
class ContextKeeper {
ResourceFileWriter *FileWriter;
ResourceFileWriter::ObjectInfo SavedInfo;
public:
ContextKeeper(ResourceFileWriter *V)
: FileWriter(V), SavedInfo(V->ObjectData) {}
~ContextKeeper() { FileWriter->ObjectData = SavedInfo; }
};
static Error createError(const Twine &Message,
std::errc Type = std::errc::invalid_argument) {
return make_error<StringError>(Message, std::make_error_code(Type));
}
static Error checkNumberFits(uint32_t Number, size_t MaxBits,
const Twine &FieldName) {
assert(1 <= MaxBits && MaxBits <= 32);
if (!(Number >> MaxBits))
return Error::success();
return createError(FieldName + " (" + Twine(Number) + ") does not fit in " +
Twine(MaxBits) + " bits.",
std::errc::value_too_large);
}
template <typename FitType>
static Error checkNumberFits(uint32_t Number, const Twine &FieldName) {
return checkNumberFits(Number, sizeof(FitType) * 8, FieldName);
}
// A similar function for signed integers.
template <typename FitType>
static Error checkSignedNumberFits(uint32_t Number, const Twine &FieldName,
bool CanBeNegative) {
int32_t SignedNum = Number;
if (SignedNum < std::numeric_limits<FitType>::min() ||
SignedNum > std::numeric_limits<FitType>::max())
return createError(FieldName + " (" + Twine(SignedNum) +
") does not fit in " + Twine(sizeof(FitType) * 8) +
"-bit signed integer type.",
std::errc::value_too_large);
if (!CanBeNegative && SignedNum < 0)
return createError(FieldName + " (" + Twine(SignedNum) +
") cannot be negative.");
return Error::success();
}
static Error checkRCInt(RCInt Number, const Twine &FieldName) {
if (Number.isLong())
return Error::success();
return checkNumberFits<uint16_t>(Number, FieldName);
}
static Error checkIntOrString(IntOrString Value, const Twine &FieldName) {
if (!Value.isInt())
return Error::success();
return checkNumberFits<uint16_t>(Value.getInt(), FieldName);
}
static bool stripQuotes(StringRef &Str, bool &IsLongString) {
if (!Str.contains('"'))
return false;
// Just take the contents of the string, checking if it's been marked long.
IsLongString = Str.startswith_lower("L");
if (IsLongString)
Str = Str.drop_front();
bool StripSuccess = Str.consume_front("\"") && Str.consume_back("\"");
(void)StripSuccess;
assert(StripSuccess && "Strings should be enclosed in quotes.");
return true;
}
static UTF16 cp1252ToUnicode(unsigned char C) {
static const UTF16 Map80[] = {
0x20ac, 0x0081, 0x201a, 0x0192, 0x201e, 0x2026, 0x2020, 0x2021,
0x02c6, 0x2030, 0x0160, 0x2039, 0x0152, 0x008d, 0x017d, 0x008f,
0x0090, 0x2018, 0x2019, 0x201c, 0x201d, 0x2022, 0x2013, 0x2014,
0x02dc, 0x2122, 0x0161, 0x203a, 0x0153, 0x009d, 0x017e, 0x0178,
};
if (C >= 0x80 && C <= 0x9F)
return Map80[C - 0x80];
return C;
}
// Describes a way to handle '\0' characters when processing the string.
// rc.exe tool sometimes behaves in a weird way in postprocessing.
// If the string to be output is equivalent to a C-string (e.g. in MENU
// titles), string is (predictably) truncated after first 0-byte.
// When outputting a string table, the behavior is equivalent to appending
// '\0\0' at the end of the string, and then stripping the string
// before the first '\0\0' occurrence.
// Finally, when handling strings in user-defined resources, 0-bytes
// aren't stripped, nor do they terminate the string.
enum class NullHandlingMethod {
UserResource, // Don't terminate string on '\0'.
CutAtNull, // Terminate string on '\0'.
CutAtDoubleNull // Terminate string on '\0\0'; strip final '\0'.
};
// Parses an identifier or string and returns a processed version of it:
// * Strip the string boundary quotes.
// * Convert the input code page characters to UTF16.
// * Squash "" to a single ".
// * Replace the escape sequences with their processed version.
// For identifiers, this is no-op.
static Error processString(StringRef Str, NullHandlingMethod NullHandler,
bool &IsLongString, SmallVectorImpl<UTF16> &Result,
int CodePage) {
bool IsString = stripQuotes(Str, IsLongString);
SmallVector<UTF16, 128> Chars;
// Convert the input bytes according to the chosen codepage.
if (CodePage == CpUtf8) {
convertUTF8ToUTF16String(Str, Chars);
} else if (CodePage == CpWin1252) {
for (char C : Str)
Chars.push_back(cp1252ToUnicode((unsigned char)C));
} else {
// For other, unknown codepages, only allow plain ASCII input.
for (char C : Str) {
if ((unsigned char)C > 0x7F)
return createError("Non-ASCII 8-bit codepoint (" + Twine(C) +
") can't be interpreted in the current codepage");
Chars.push_back((unsigned char)C);
}
}
if (!IsString) {
// It's an identifier if it's not a string. Make all characters uppercase.
for (UTF16 &Ch : Chars) {
assert(Ch <= 0x7F && "We didn't allow identifiers to be non-ASCII");
Ch = toupper(Ch);
}
Result.swap(Chars);
return Error::success();
}
Result.reserve(Chars.size());
size_t Pos = 0;
auto AddRes = [&Result, NullHandler, IsLongString](UTF16 Char) -> Error {
if (!IsLongString) {
if (NullHandler == NullHandlingMethod::UserResource) {
// Narrow strings in user-defined resources are *not* output in
// UTF-16 format.
if (Char > 0xFF)
return createError("Non-8-bit codepoint (" + Twine(Char) +
") can't occur in a user-defined narrow string");
}
}
Result.push_back(Char);
return Error::success();
};
auto AddEscapedChar = [AddRes, IsLongString, CodePage](UTF16 Char) -> Error {
if (!IsLongString) {
// Escaped chars in narrow strings have to be interpreted according to
// the chosen code page.
if (Char > 0xFF)
return createError("Non-8-bit escaped char (" + Twine(Char) +
") can't occur in narrow string");
if (CodePage == CpUtf8) {
if (Char >= 0x80)
return createError("Unable to interpret single byte (" + Twine(Char) +
") as UTF-8");
} else if (CodePage == CpWin1252) {
Char = cp1252ToUnicode(Char);
} else {
// Unknown/unsupported codepage, only allow ASCII input.
if (Char > 0x7F)
return createError("Non-ASCII 8-bit codepoint (" + Twine(Char) +
") can't "
"occur in a non-Unicode string");
}
}
return AddRes(Char);
};
while (Pos < Chars.size()) {
UTF16 CurChar = Chars[Pos];
++Pos;
// Strip double "".
if (CurChar == '"') {
if (Pos == Chars.size() || Chars[Pos] != '"')
return createError("Expected \"\"");
++Pos;
RETURN_IF_ERROR(AddRes('"'));
continue;
}
if (CurChar == '\\') {
UTF16 TypeChar = Chars[Pos];
++Pos;
if (TypeChar == 'x' || TypeChar == 'X') {
// Read a hex number. Max number of characters to read differs between
// narrow and wide strings.
UTF16 ReadInt = 0;
size_t RemainingChars = IsLongString ? 4 : 2;
// We don't want to read non-ASCII hex digits. std:: functions past
// 0xFF invoke UB.
//
// FIXME: actually, Microsoft version probably doesn't check this
// condition and uses their Unicode version of 'isxdigit'. However,
// there are some hex-digit Unicode character outside of ASCII, and
// some of these are actually accepted by rc.exe, the notable example
// being fullwidth forms (U+FF10..U+FF19 etc.) These can be written
// instead of ASCII digits in \x... escape sequence and get accepted.
// However, the resulting hexcodes seem totally unpredictable.
// We think it's infeasible to try to reproduce this behavior, nor to
// put effort in order to detect it.
while (RemainingChars && Pos < Chars.size() && Chars[Pos] < 0x80) {
if (!isxdigit(Chars[Pos]))
break;
char Digit = tolower(Chars[Pos]);
++Pos;
ReadInt <<= 4;
if (isdigit(Digit))
ReadInt |= Digit - '0';
else
ReadInt |= Digit - 'a' + 10;
--RemainingChars;
}
RETURN_IF_ERROR(AddEscapedChar(ReadInt));
continue;
}
if (TypeChar >= '0' && TypeChar < '8') {
// Read an octal number. Note that we've already read the first digit.
UTF16 ReadInt = TypeChar - '0';
size_t RemainingChars = IsLongString ? 6 : 2;
while (RemainingChars && Pos < Chars.size() && Chars[Pos] >= '0' &&
Chars[Pos] < '8') {
ReadInt <<= 3;
ReadInt |= Chars[Pos] - '0';
--RemainingChars;
++Pos;
}
RETURN_IF_ERROR(AddEscapedChar(ReadInt));
continue;
}
switch (TypeChar) {
case 'A':
case 'a':
// Windows '\a' translates into '\b' (Backspace).
RETURN_IF_ERROR(AddRes('\b'));
break;
case 'n': // Somehow, RC doesn't recognize '\N' and '\R'.
RETURN_IF_ERROR(AddRes('\n'));
break;
case 'r':
RETURN_IF_ERROR(AddRes('\r'));
break;
case 'T':
case 't':
RETURN_IF_ERROR(AddRes('\t'));
break;
case '\\':
RETURN_IF_ERROR(AddRes('\\'));
break;
case '"':
// RC accepts \" only if another " comes afterwards; then, \"" means
// a single ".
if (Pos == Chars.size() || Chars[Pos] != '"')
return createError("Expected \\\"\"");
++Pos;
RETURN_IF_ERROR(AddRes('"'));
break;
default:
// If TypeChar means nothing, \ is should be output to stdout with
// following char. However, rc.exe consumes these characters when
// dealing with wide strings.
if (!IsLongString) {
RETURN_IF_ERROR(AddRes('\\'));
RETURN_IF_ERROR(AddRes(TypeChar));
}
break;
}
continue;
}
// If nothing interesting happens, just output the character.
RETURN_IF_ERROR(AddRes(CurChar));
}
switch (NullHandler) {
case NullHandlingMethod::CutAtNull:
for (size_t Pos = 0; Pos < Result.size(); ++Pos)
if (Result[Pos] == '\0')
Result.resize(Pos);
break;
case NullHandlingMethod::CutAtDoubleNull:
for (size_t Pos = 0; Pos + 1 < Result.size(); ++Pos)
if (Result[Pos] == '\0' && Result[Pos + 1] == '\0')
Result.resize(Pos);
if (Result.size() > 0 && Result.back() == '\0')
Result.pop_back();
break;
case NullHandlingMethod::UserResource:
break;
}
return Error::success();
}
uint64_t ResourceFileWriter::writeObject(const ArrayRef<uint8_t> Data) {
uint64_t Result = tell();
FS->write((const char *)Data.begin(), Data.size());
return Result;
}
Error ResourceFileWriter::writeCString(StringRef Str, bool WriteTerminator) {
SmallVector<UTF16, 128> ProcessedString;
bool IsLongString;
RETURN_IF_ERROR(processString(Str, NullHandlingMethod::CutAtNull,
IsLongString, ProcessedString,
Params.CodePage));
for (auto Ch : ProcessedString)
writeInt<uint16_t>(Ch);
if (WriteTerminator)
writeInt<uint16_t>(0);
return Error::success();
}
Error ResourceFileWriter::writeIdentifier(const IntOrString &Ident) {
return writeIntOrString(Ident);
}
Error ResourceFileWriter::writeIntOrString(const IntOrString &Value) {
if (!Value.isInt())
return writeCString(Value.getString());
writeInt<uint16_t>(0xFFFF);
writeInt<uint16_t>(Value.getInt());
return Error::success();
}
void ResourceFileWriter::writeRCInt(RCInt Value) {
if (Value.isLong())
writeInt<uint32_t>(Value);
else
writeInt<uint16_t>(Value);
}
Error ResourceFileWriter::appendFile(StringRef Filename) {
bool IsLong;
stripQuotes(Filename, IsLong);
auto File = loadFile(Filename);
if (!File)
return File.takeError();
*FS << (*File)->getBuffer();
return Error::success();
}
void ResourceFileWriter::padStream(uint64_t Length) {
assert(Length > 0);
uint64_t Location = tell();
Location %= Length;
uint64_t Pad = (Length - Location) % Length;
for (uint64_t i = 0; i < Pad; ++i)
writeInt<uint8_t>(0);
}
Error ResourceFileWriter::handleError(Error Err, const RCResource *Res) {
if (Err)
return joinErrors(createError("Error in " + Res->getResourceTypeName() +
" statement (ID " + Twine(Res->ResName) +
"): "),
std::move(Err));
return Error::success();
}
Error ResourceFileWriter::visitNullResource(const RCResource *Res) {
return writeResource(Res, &ResourceFileWriter::writeNullBody);
}
Error ResourceFileWriter::visitAcceleratorsResource(const RCResource *Res) {
return writeResource(Res, &ResourceFileWriter::writeAcceleratorsBody);
}
Error ResourceFileWriter::visitBitmapResource(const RCResource *Res) {
return writeResource(Res, &ResourceFileWriter::writeBitmapBody);
}
Error ResourceFileWriter::visitCursorResource(const RCResource *Res) {
return handleError(visitIconOrCursorResource(Res), Res);
}
Error ResourceFileWriter::visitDialogResource(const RCResource *Res) {
return writeResource(Res, &ResourceFileWriter::writeDialogBody);
}
Error ResourceFileWriter::visitIconResource(const RCResource *Res) {
return handleError(visitIconOrCursorResource(Res), Res);
}
Error ResourceFileWriter::visitCaptionStmt(const CaptionStmt *Stmt) {
ObjectData.Caption = Stmt->Value;
return Error::success();
}
Error ResourceFileWriter::visitClassStmt(const ClassStmt *Stmt) {
ObjectData.Class = Stmt->Value;
return Error::success();
}
Error ResourceFileWriter::visitHTMLResource(const RCResource *Res) {
return writeResource(Res, &ResourceFileWriter::writeHTMLBody);
}
Error ResourceFileWriter::visitMenuResource(const RCResource *Res) {
return writeResource(Res, &ResourceFileWriter::writeMenuBody);
}
Error ResourceFileWriter::visitStringTableResource(const RCResource *Base) {
const auto *Res = cast<StringTableResource>(Base);
ContextKeeper RAII(this);
RETURN_IF_ERROR(Res->applyStmts(this));
for (auto &String : Res->Table) {
RETURN_IF_ERROR(checkNumberFits<uint16_t>(String.first, "String ID"));
uint16_t BundleID = String.first >> 4;
StringTableInfo::BundleKey Key(BundleID, ObjectData.LanguageInfo);
auto &BundleData = StringTableData.BundleData;
auto Iter = BundleData.find(Key);
if (Iter == BundleData.end()) {
// Need to create a bundle.
StringTableData.BundleList.push_back(Key);
auto EmplaceResult = BundleData.emplace(
Key, StringTableInfo::Bundle(ObjectData, Res->MemoryFlags));
assert(EmplaceResult.second && "Could not create a bundle");
Iter = EmplaceResult.first;
}
RETURN_IF_ERROR(
insertStringIntoBundle(Iter->second, String.first, String.second));
}
return Error::success();
}
Error ResourceFileWriter::visitUserDefinedResource(const RCResource *Res) {
return writeResource(Res, &ResourceFileWriter::writeUserDefinedBody);
}
Error ResourceFileWriter::visitVersionInfoResource(const RCResource *Res) {
return writeResource(Res, &ResourceFileWriter::writeVersionInfoBody);
}
Error ResourceFileWriter::visitCharacteristicsStmt(
const CharacteristicsStmt *Stmt) {
ObjectData.Characteristics = Stmt->Value;
return Error::success();
}
Error ResourceFileWriter::visitExStyleStmt(const ExStyleStmt *Stmt) {
ObjectData.ExStyle = Stmt->Value;
return Error::success();
}
Error ResourceFileWriter::visitFontStmt(const FontStmt *Stmt) {
RETURN_IF_ERROR(checkNumberFits<uint16_t>(Stmt->Size, "Font size"));
RETURN_IF_ERROR(checkNumberFits<uint16_t>(Stmt->Weight, "Font weight"));
RETURN_IF_ERROR(checkNumberFits<uint8_t>(Stmt->Charset, "Font charset"));
ObjectInfo::FontInfo Font{Stmt->Size, Stmt->Name, Stmt->Weight, Stmt->Italic,
Stmt->Charset};
ObjectData.Font.emplace(Font);
return Error::success();
}
Error ResourceFileWriter::visitLanguageStmt(const LanguageResource *Stmt) {
RETURN_IF_ERROR(checkNumberFits(Stmt->Lang, 10, "Primary language ID"));
RETURN_IF_ERROR(checkNumberFits(Stmt->SubLang, 6, "Sublanguage ID"));
ObjectData.LanguageInfo = Stmt->Lang | (Stmt->SubLang << 10);
return Error::success();
}
Error ResourceFileWriter::visitStyleStmt(const StyleStmt *Stmt) {
ObjectData.Style = Stmt->Value;
return Error::success();
}
Error ResourceFileWriter::visitVersionStmt(const VersionStmt *Stmt) {
ObjectData.VersionInfo = Stmt->Value;
return Error::success();
}
Error ResourceFileWriter::writeResource(
const RCResource *Res,
Error (ResourceFileWriter::*BodyWriter)(const RCResource *)) {
// We don't know the sizes yet.
object::WinResHeaderPrefix HeaderPrefix{ulittle32_t(0U), ulittle32_t(0U)};
uint64_t HeaderLoc = writeObject(HeaderPrefix);
auto ResType = Res->getResourceType();
RETURN_IF_ERROR(checkIntOrString(ResType, "Resource type"));
RETURN_IF_ERROR(checkIntOrString(Res->ResName, "Resource ID"));
RETURN_IF_ERROR(handleError(writeIdentifier(ResType), Res));
RETURN_IF_ERROR(handleError(writeIdentifier(Res->ResName), Res));
// Apply the resource-local optional statements.
ContextKeeper RAII(this);
RETURN_IF_ERROR(handleError(Res->applyStmts(this), Res));
padStream(sizeof(uint32_t));
object::WinResHeaderSuffix HeaderSuffix{
ulittle32_t(0), // DataVersion; seems to always be 0
ulittle16_t(Res->MemoryFlags), ulittle16_t(ObjectData.LanguageInfo),
ulittle32_t(ObjectData.VersionInfo),
ulittle32_t(ObjectData.Characteristics)};
writeObject(HeaderSuffix);
uint64_t DataLoc = tell();
RETURN_IF_ERROR(handleError((this->*BodyWriter)(Res), Res));
// RETURN_IF_ERROR(handleError(dumpResource(Ctx)));
// Update the sizes.
HeaderPrefix.DataSize = tell() - DataLoc;
HeaderPrefix.HeaderSize = DataLoc - HeaderLoc;
writeObjectAt(HeaderPrefix, HeaderLoc);
padStream(sizeof(uint32_t));
return Error::success();
}
// --- NullResource helpers. --- //
Error ResourceFileWriter::writeNullBody(const RCResource *) {
return Error::success();
}
// --- AcceleratorsResource helpers. --- //
Error ResourceFileWriter::writeSingleAccelerator(
const AcceleratorsResource::Accelerator &Obj, bool IsLastItem) {
using Accelerator = AcceleratorsResource::Accelerator;
using Opt = Accelerator::Options;
struct AccelTableEntry {
ulittle16_t Flags;
ulittle16_t ANSICode;
ulittle16_t Id;
uint16_t Padding;
} Entry{ulittle16_t(0), ulittle16_t(0), ulittle16_t(0), 0};
bool IsASCII = Obj.Flags & Opt::ASCII, IsVirtKey = Obj.Flags & Opt::VIRTKEY;
// Remove ASCII flags (which doesn't occur in .res files).
Entry.Flags = Obj.Flags & ~Opt::ASCII;
if (IsLastItem)
Entry.Flags |= 0x80;
RETURN_IF_ERROR(checkNumberFits<uint16_t>(Obj.Id, "ACCELERATORS entry ID"));
Entry.Id = ulittle16_t(Obj.Id);
auto createAccError = [&Obj](const char *Msg) {
return createError("Accelerator ID " + Twine(Obj.Id) + ": " + Msg);
};
if (IsASCII && IsVirtKey)
return createAccError("Accelerator can't be both ASCII and VIRTKEY");
if (!IsVirtKey && (Obj.Flags & (Opt::ALT | Opt::SHIFT | Opt::CONTROL)))
return createAccError("Can only apply ALT, SHIFT or CONTROL to VIRTKEY"
" accelerators");
if (Obj.Event.isInt()) {
if (!IsASCII && !IsVirtKey)
return createAccError(
"Accelerator with a numeric event must be either ASCII"
" or VIRTKEY");
uint32_t EventVal = Obj.Event.getInt();
RETURN_IF_ERROR(
checkNumberFits<uint16_t>(EventVal, "Numeric event key ID"));
Entry.ANSICode = ulittle16_t(EventVal);
writeObject(Entry);
return Error::success();
}
StringRef Str = Obj.Event.getString();
bool IsWide;
stripQuotes(Str, IsWide);
if (Str.size() == 0 || Str.size() > 2)
return createAccError(
"Accelerator string events should have length 1 or 2");
if (Str[0] == '^') {
if (Str.size() == 1)
return createAccError("No character following '^' in accelerator event");
if (IsVirtKey)
return createAccError(
"VIRTKEY accelerator events can't be preceded by '^'");
char Ch = Str[1];
if (Ch >= 'a' && Ch <= 'z')
Entry.ANSICode = ulittle16_t(Ch - 'a' + 1);
else if (Ch >= 'A' && Ch <= 'Z')
Entry.ANSICode = ulittle16_t(Ch - 'A' + 1);
else
return createAccError("Control character accelerator event should be"
" alphabetic");
writeObject(Entry);
return Error::success();
}
if (Str.size() == 2)
return createAccError("Event string should be one-character, possibly"
" preceded by '^'");
uint8_t EventCh = Str[0];
// The original tool just warns in this situation. We chose to fail.
if (IsVirtKey && !isalnum(EventCh))
return createAccError("Non-alphanumeric characters cannot describe virtual"
" keys");
if (EventCh > 0x7F)
return createAccError("Non-ASCII description of accelerator");
if (IsVirtKey)
EventCh = toupper(EventCh);
Entry.ANSICode = ulittle16_t(EventCh);
writeObject(Entry);
return Error::success();
}
Error ResourceFileWriter::writeAcceleratorsBody(const RCResource *Base) {
auto *Res = cast<AcceleratorsResource>(Base);
size_t AcceleratorId = 0;
for (auto &Acc : Res->Accelerators) {
++AcceleratorId;
RETURN_IF_ERROR(
writeSingleAccelerator(Acc, AcceleratorId == Res->Accelerators.size()));
}
return Error::success();
}
// --- BitmapResource helpers. --- //
Error ResourceFileWriter::writeBitmapBody(const RCResource *Base) {
StringRef Filename = cast<BitmapResource>(Base)->BitmapLoc;
bool IsLong;
stripQuotes(Filename, IsLong);
auto File = loadFile(Filename);
if (!File)
return File.takeError();
StringRef Buffer = (*File)->getBuffer();
// Skip the 14 byte BITMAPFILEHEADER.
constexpr size_t BITMAPFILEHEADER_size = 14;
if (Buffer.size() < BITMAPFILEHEADER_size || Buffer[0] != 'B' ||
Buffer[1] != 'M')
return createError("Incorrect bitmap file.");
*FS << Buffer.substr(BITMAPFILEHEADER_size);
return Error::success();
}
// --- CursorResource and IconResource helpers. --- //
// ICONRESDIR structure. Describes a single icon in resource group.
//
// Ref: msdn.microsoft.com/en-us/library/windows/desktop/ms648016.aspx
struct IconResDir {
uint8_t Width;
uint8_t Height;
uint8_t ColorCount;
uint8_t Reserved;
};
// CURSORDIR structure. Describes a single cursor in resource group.
//
// Ref: msdn.microsoft.com/en-us/library/windows/desktop/ms648011(v=vs.85).aspx
struct CursorDir {
ulittle16_t Width;
ulittle16_t Height;
};
// RESDIRENTRY structure, stripped from the last item. Stripping made
// for compatibility with RESDIR.
//
// Ref: msdn.microsoft.com/en-us/library/windows/desktop/ms648026(v=vs.85).aspx
struct ResourceDirEntryStart {
union {
CursorDir Cursor; // Used in CURSOR resources.
IconResDir Icon; // Used in .ico and .cur files, and ICON resources.
};
ulittle16_t Planes; // HotspotX (.cur files but not CURSOR resource).
ulittle16_t BitCount; // HotspotY (.cur files but not CURSOR resource).
ulittle32_t Size;
// ulittle32_t ImageOffset; // Offset to image data (ICONDIRENTRY only).
// ulittle16_t IconID; // Resource icon ID (RESDIR only).
};
// BITMAPINFOHEADER structure. Describes basic information about the bitmap
// being read.
//
// Ref: msdn.microsoft.com/en-us/library/windows/desktop/dd183376(v=vs.85).aspx
struct BitmapInfoHeader {
ulittle32_t Size;
ulittle32_t Width;
ulittle32_t Height;
ulittle16_t Planes;
ulittle16_t BitCount;
ulittle32_t Compression;
ulittle32_t SizeImage;
ulittle32_t XPelsPerMeter;
ulittle32_t YPelsPerMeter;
ulittle32_t ClrUsed;
ulittle32_t ClrImportant;
};
// Group icon directory header. Called ICONDIR in .ico/.cur files and
// NEWHEADER in .res files.
//
// Ref: msdn.microsoft.com/en-us/library/windows/desktop/ms648023(v=vs.85).aspx
struct GroupIconDir {
ulittle16_t Reserved; // Always 0.
ulittle16_t ResType; // 1 for icons, 2 for cursors.
ulittle16_t ResCount; // Number of items.
};
enum class IconCursorGroupType { Icon, Cursor };
class SingleIconCursorResource : public RCResource {
public:
IconCursorGroupType Type;
const ResourceDirEntryStart &Header;
ArrayRef<uint8_t> Image;
SingleIconCursorResource(IconCursorGroupType ResourceType,
const ResourceDirEntryStart &HeaderEntry,
ArrayRef<uint8_t> ImageData, uint16_t Flags)
: RCResource(Flags), Type(ResourceType), Header(HeaderEntry),
Image(ImageData) {}
Twine getResourceTypeName() const override { return "Icon/cursor image"; }
IntOrString getResourceType() const override {
return Type == IconCursorGroupType::Icon ? RkSingleIcon : RkSingleCursor;
}
ResourceKind getKind() const override { return RkSingleCursorOrIconRes; }
static bool classof(const RCResource *Res) {
return Res->getKind() == RkSingleCursorOrIconRes;
}
};
class IconCursorGroupResource : public RCResource {
public:
IconCursorGroupType Type;
GroupIconDir Header;
std::vector<ResourceDirEntryStart> ItemEntries;
IconCursorGroupResource(IconCursorGroupType ResourceType,
const GroupIconDir &HeaderData,
std::vector<ResourceDirEntryStart> &&Entries)
: Type(ResourceType), Header(HeaderData),
ItemEntries(std::move(Entries)) {}
Twine getResourceTypeName() const override { return "Icon/cursor group"; }
IntOrString getResourceType() const override {
return Type == IconCursorGroupType::Icon ? RkIconGroup : RkCursorGroup;
}
ResourceKind getKind() const override { return RkCursorOrIconGroupRes; }
static bool classof(const RCResource *Res) {
return Res->getKind() == RkCursorOrIconGroupRes;
}
};
Error ResourceFileWriter::writeSingleIconOrCursorBody(const RCResource *Base) {
auto *Res = cast<SingleIconCursorResource>(Base);
if (Res->Type == IconCursorGroupType::Cursor) {
// In case of cursors, two WORDS are appended to the beginning
// of the resource: HotspotX (Planes in RESDIRENTRY),
// and HotspotY (BitCount).
//
// Ref: msdn.microsoft.com/en-us/library/windows/desktop/ms648026.aspx
// (Remarks section).
writeObject(Res->Header.Planes);
writeObject(Res->Header.BitCount);
}
writeObject(Res->Image);
return Error::success();
}
Error ResourceFileWriter::writeIconOrCursorGroupBody(const RCResource *Base) {
auto *Res = cast<IconCursorGroupResource>(Base);
writeObject(Res->Header);
for (auto Item : Res->ItemEntries) {
writeObject(Item);
writeInt(IconCursorID++);
}
return Error::success();
}
Error ResourceFileWriter::visitSingleIconOrCursor(const RCResource *Res) {
return writeResource(Res, &ResourceFileWriter::writeSingleIconOrCursorBody);
}
Error ResourceFileWriter::visitIconOrCursorGroup(const RCResource *Res) {
return writeResource(Res, &ResourceFileWriter::writeIconOrCursorGroupBody);
}
Error ResourceFileWriter::visitIconOrCursorResource(const RCResource *Base) {
IconCursorGroupType Type;
StringRef FileStr;
IntOrString ResName = Base->ResName;
if (auto *IconRes = dyn_cast<IconResource>(Base)) {
FileStr = IconRes->IconLoc;
Type = IconCursorGroupType::Icon;
} else {
auto *CursorRes = dyn_cast<CursorResource>(Base);
FileStr = CursorRes->CursorLoc;
Type = IconCursorGroupType::Cursor;
}
bool IsLong;
stripQuotes(FileStr, IsLong);
auto File = loadFile(FileStr);
if (!File)
return File.takeError();
BinaryStreamReader Reader((*File)->getBuffer(), support::little);
// Read the file headers.
// - At the beginning, ICONDIR/NEWHEADER header.
// - Then, a number of RESDIR headers follow. These contain offsets
// to data.
const GroupIconDir *Header;
RETURN_IF_ERROR(Reader.readObject(Header));
if (Header->Reserved != 0)
return createError("Incorrect icon/cursor Reserved field; should be 0.");
uint16_t NeededType = Type == IconCursorGroupType::Icon ? 1 : 2;
if (Header->ResType != NeededType)
return createError("Incorrect icon/cursor ResType field; should be " +
Twine(NeededType) + ".");
uint16_t NumItems = Header->ResCount;
// Read single ico/cur headers.
std::vector<ResourceDirEntryStart> ItemEntries;
ItemEntries.reserve(NumItems);
std::vector<uint32_t> ItemOffsets(NumItems);
for (size_t ID = 0; ID < NumItems; ++ID) {
const ResourceDirEntryStart *Object;
RETURN_IF_ERROR(Reader.readObject(Object));
ItemEntries.push_back(*Object);
RETURN_IF_ERROR(Reader.readInteger(ItemOffsets[ID]));
}
// Now write each icon/cursors one by one. At first, all the contents
// without ICO/CUR header. This is described by SingleIconCursorResource.
for (size_t ID = 0; ID < NumItems; ++ID) {
// Load the fragment of file.
Reader.setOffset(ItemOffsets[ID]);
ArrayRef<uint8_t> Image;
RETURN_IF_ERROR(Reader.readArray(Image, ItemEntries[ID].Size));
SingleIconCursorResource SingleRes(Type, ItemEntries[ID], Image,
Base->MemoryFlags);
SingleRes.setName(IconCursorID + ID);
RETURN_IF_ERROR(visitSingleIconOrCursor(&SingleRes));
}
// Now, write all the headers concatenated into a separate resource.
for (size_t ID = 0; ID < NumItems; ++ID) {
// We need to rewrite the cursor headers, and fetch actual values
// for Planes/BitCount.
const auto &OldHeader = ItemEntries[ID];
ResourceDirEntryStart NewHeader = OldHeader;
if (Type == IconCursorGroupType::Cursor) {
NewHeader.Cursor.Width = OldHeader.Icon.Width;
// Each cursor in fact stores two bitmaps, one under another.
// Height provided in cursor definition describes the height of the
// cursor, whereas the value existing in resource definition describes
// the height of the bitmap. Therefore, we need to double this height.
NewHeader.Cursor.Height = OldHeader.Icon.Height * 2;
// Two WORDs were written at the beginning of the resource (hotspot
// location). This is reflected in Size field.
NewHeader.Size += 2 * sizeof(uint16_t);
}
// Now, we actually need to read the bitmap header to find
// the number of planes and the number of bits per pixel.
Reader.setOffset(ItemOffsets[ID]);
const BitmapInfoHeader *BMPHeader;
RETURN_IF_ERROR(Reader.readObject(BMPHeader));
if (BMPHeader->Size == sizeof(BitmapInfoHeader)) {
NewHeader.Planes = BMPHeader->Planes;
NewHeader.BitCount = BMPHeader->BitCount;
} else {
// A PNG .ico file.
// https://blogs.msdn.microsoft.com/oldnewthing/20101022-00/?p=12473
// "The image must be in 32bpp"
NewHeader.Planes = 1;
NewHeader.BitCount = 32;
}
ItemEntries[ID] = NewHeader;
}
IconCursorGroupResource HeaderRes(Type, *Header, std::move(ItemEntries));
HeaderRes.setName(ResName);
if (Base->MemoryFlags & MfPreload) {
HeaderRes.MemoryFlags |= MfPreload;
HeaderRes.MemoryFlags &= ~MfPure;
}
RETURN_IF_ERROR(visitIconOrCursorGroup(&HeaderRes));
return Error::success();
}
// --- DialogResource helpers. --- //
Error ResourceFileWriter::writeSingleDialogControl(const Control &Ctl,
bool IsExtended) {
// Each control should be aligned to DWORD.
padStream(sizeof(uint32_t));
auto TypeInfo = Control::SupportedCtls.lookup(Ctl.Type);
IntWithNotMask CtlStyle(TypeInfo.Style);
CtlStyle |= Ctl.Style.getValueOr(RCInt(0));
uint32_t CtlExtStyle = Ctl.ExtStyle.getValueOr(0);
// DIALOG(EX) item header prefix.
if (!IsExtended) {
struct {
ulittle32_t Style;
ulittle32_t ExtStyle;
} Prefix{ulittle32_t(CtlStyle.getValue()), ulittle32_t(CtlExtStyle)};
writeObject(Prefix);
} else {
struct {
ulittle32_t HelpID;
ulittle32_t ExtStyle;
ulittle32_t Style;
} Prefix{ulittle32_t(Ctl.HelpID.getValueOr(0)), ulittle32_t(CtlExtStyle),
ulittle32_t(CtlStyle.getValue())};
writeObject(Prefix);
}
// Common fixed-length part.
RETURN_IF_ERROR(checkSignedNumberFits<int16_t>(
Ctl.X, "Dialog control x-coordinate", true));
RETURN_IF_ERROR(checkSignedNumberFits<int16_t>(
Ctl.Y, "Dialog control y-coordinate", true));
RETURN_IF_ERROR(
checkSignedNumberFits<int16_t>(Ctl.Width, "Dialog control width", false));
RETURN_IF_ERROR(checkSignedNumberFits<int16_t>(
Ctl.Height, "Dialog control height", false));
struct {
ulittle16_t X;
ulittle16_t Y;
ulittle16_t Width;
ulittle16_t Height;
} Middle{ulittle16_t(Ctl.X), ulittle16_t(Ctl.Y), ulittle16_t(Ctl.Width),
ulittle16_t(Ctl.Height)};
writeObject(Middle);
// ID; it's 16-bit in DIALOG and 32-bit in DIALOGEX.
if (!IsExtended) {
// It's common to use -1, i.e. UINT32_MAX, for controls one doesn't
// want to refer to later.
if (Ctl.ID != static_cast<uint32_t>(-1))
RETURN_IF_ERROR(checkNumberFits<uint16_t>(
Ctl.ID, "Control ID in simple DIALOG resource"));
writeInt<uint16_t>(Ctl.ID);
} else {
writeInt<uint32_t>(Ctl.ID);
}
// Window class - either 0xFFFF + 16-bit integer or a string.
RETURN_IF_ERROR(writeIntOrString(Ctl.Class));
// Element caption/reference ID. ID is preceded by 0xFFFF.
RETURN_IF_ERROR(checkIntOrString(Ctl.Title, "Control reference ID"));
RETURN_IF_ERROR(writeIntOrString(Ctl.Title));
// # bytes of extra creation data count. Don't pass any.
writeInt<uint16_t>(0);
return Error::success();
}
Error ResourceFileWriter::writeDialogBody(const RCResource *Base) {
auto *Res = cast<DialogResource>(Base);
// Default style: WS_POPUP | WS_BORDER | WS_SYSMENU.
const uint32_t DefaultStyle = 0x80880000;
const uint32_t StyleFontFlag = 0x40;
const uint32_t StyleCaptionFlag = 0x00C00000;
uint32_t UsedStyle = ObjectData.Style.getValueOr(DefaultStyle);
if (ObjectData.Font)
UsedStyle |= StyleFontFlag;
else
UsedStyle &= ~StyleFontFlag;
// Actually, in case of empty (but existent) caption, the examined field
// is equal to "\"\"". That's why empty captions are still noticed.
if (ObjectData.Caption != "")
UsedStyle |= StyleCaptionFlag;
const uint16_t DialogExMagic = 0xFFFF;
uint32_t ExStyle = ObjectData.ExStyle.getValueOr(0);
// Write DIALOG(EX) header prefix. These are pretty different.
if (!Res->IsExtended) {
// We cannot let the higher word of DefaultStyle be equal to 0xFFFF.
// In such a case, whole object (in .res file) is equivalent to a
// DIALOGEX. It might lead to access violation/segmentation fault in
// resource readers. For example,
// 1 DIALOG 0, 0, 0, 65432
// STYLE 0xFFFF0001 {}
// would be compiled to a DIALOGEX with 65432 controls.
if ((UsedStyle >> 16) == DialogExMagic)
return createError("16 higher bits of DIALOG resource style cannot be"
" equal to 0xFFFF");
struct {
ulittle32_t Style;
ulittle32_t ExtStyle;
} Prefix{ulittle32_t(UsedStyle),
ulittle32_t(ExStyle)};
writeObject(Prefix);
} else {
struct {
ulittle16_t Version;
ulittle16_t Magic;
ulittle32_t HelpID;
ulittle32_t ExtStyle;
ulittle32_t Style;
} Prefix{ulittle16_t(1), ulittle16_t(DialogExMagic),
ulittle32_t(Res->HelpID), ulittle32_t(ExStyle), ulittle32_t(UsedStyle)};
writeObject(Prefix);
}
// Now, a common part. First, fixed-length fields.
RETURN_IF_ERROR(checkNumberFits<uint16_t>(Res->Controls.size(),
"Number of dialog controls"));
RETURN_IF_ERROR(
checkSignedNumberFits<int16_t>(Res->X, "Dialog x-coordinate", true));
RETURN_IF_ERROR(
checkSignedNumberFits<int16_t>(Res->Y, "Dialog y-coordinate", true));
RETURN_IF_ERROR(
checkSignedNumberFits<int16_t>(Res->Width, "Dialog width", false));
RETURN_IF_ERROR(
checkSignedNumberFits<int16_t>(Res->Height, "Dialog height", false));
struct {
ulittle16_t Count;
ulittle16_t PosX;
ulittle16_t PosY;
ulittle16_t DialogWidth;
ulittle16_t DialogHeight;
} Middle{ulittle16_t(Res->Controls.size()), ulittle16_t(Res->X),
ulittle16_t(Res->Y), ulittle16_t(Res->Width),
ulittle16_t(Res->Height)};
writeObject(Middle);
// MENU field. As of now, we don't keep them in the state and can peacefully
// think there is no menu attached to the dialog.
writeInt<uint16_t>(0);
// Window CLASS field.
RETURN_IF_ERROR(writeIntOrString(ObjectData.Class));
// Window title or a single word equal to 0.
RETURN_IF_ERROR(writeCString(ObjectData.Caption));
// If there *is* a window font declared, output its data.
auto &Font = ObjectData.Font;
if (Font) {
writeInt<uint16_t>(Font->Size);
// Additional description occurs only in DIALOGEX.
if (Res->IsExtended) {
writeInt<uint16_t>(Font->Weight);
writeInt<uint8_t>(Font->IsItalic);
writeInt<uint8_t>(Font->Charset);
}
RETURN_IF_ERROR(writeCString(Font->Typeface));
}
auto handleCtlError = [&](Error &&Err, const Control &Ctl) -> Error {
if (!Err)
return Error::success();
return joinErrors(createError("Error in " + Twine(Ctl.Type) +
" control (ID " + Twine(Ctl.ID) + "):"),
std::move(Err));
};
for (auto &Ctl : Res->Controls)
RETURN_IF_ERROR(
handleCtlError(writeSingleDialogControl(Ctl, Res->IsExtended), Ctl));
return Error::success();
}
// --- HTMLResource helpers. --- //
Error ResourceFileWriter::writeHTMLBody(const RCResource *Base) {
return appendFile(cast<HTMLResource>(Base)->HTMLLoc);
}
// --- MenuResource helpers. --- //
Error ResourceFileWriter::writeMenuDefinition(
const std::unique_ptr<MenuDefinition> &Def, uint16_t Flags) {
assert(Def);
const MenuDefinition *DefPtr = Def.get();
if (auto *MenuItemPtr = dyn_cast<MenuItem>(DefPtr)) {
writeInt<uint16_t>(Flags);
// Some resource files use -1, i.e. UINT32_MAX, for empty menu items.
if (MenuItemPtr->Id != static_cast<uint32_t>(-1))
RETURN_IF_ERROR(
checkNumberFits<uint16_t>(MenuItemPtr->Id, "MENUITEM action ID"));
writeInt<uint16_t>(MenuItemPtr->Id);
RETURN_IF_ERROR(writeCString(MenuItemPtr->Name));
return Error::success();
}
if (isa<MenuSeparator>(DefPtr)) {
writeInt<uint16_t>(Flags);
writeInt<uint32_t>(0);
return Error::success();
}
auto *PopupPtr = cast<PopupItem>(DefPtr);
writeInt<uint16_t>(Flags);
RETURN_IF_ERROR(writeCString(PopupPtr->Name));
return writeMenuDefinitionList(PopupPtr->SubItems);
}
Error ResourceFileWriter::writeMenuDefinitionList(
const MenuDefinitionList &List) {
for (auto &Def : List.Definitions) {
uint16_t Flags = Def->getResFlags();
// Last element receives an additional 0x80 flag.
const uint16_t LastElementFlag = 0x0080;
if (&Def == &List.Definitions.back())
Flags |= LastElementFlag;
RETURN_IF_ERROR(writeMenuDefinition(Def, Flags));
}
return Error::success();
}
Error ResourceFileWriter::writeMenuBody(const RCResource *Base) {
// At first, MENUHEADER structure. In fact, these are two WORDs equal to 0.
// Ref: msdn.microsoft.com/en-us/library/windows/desktop/ms648018.aspx
writeInt<uint32_t>(0);
return writeMenuDefinitionList(cast<MenuResource>(Base)->Elements);
}
// --- StringTableResource helpers. --- //
class BundleResource : public RCResource {
public:
using BundleType = ResourceFileWriter::StringTableInfo::Bundle;
BundleType Bundle;
BundleResource(const BundleType &StrBundle)
: RCResource(StrBundle.MemoryFlags), Bundle(StrBundle) {}
IntOrString getResourceType() const override { return 6; }
ResourceKind getKind() const override { return RkStringTableBundle; }
static bool classof(const RCResource *Res) {
return Res->getKind() == RkStringTableBundle;
}
Twine getResourceTypeName() const override { return "STRINGTABLE"; }
};
Error ResourceFileWriter::visitStringTableBundle(const RCResource *Res) {
return writeResource(Res, &ResourceFileWriter::writeStringTableBundleBody);
}
Error ResourceFileWriter::insertStringIntoBundle(
StringTableInfo::Bundle &Bundle, uint16_t StringID,
const std::vector<StringRef> &String) {
uint16_t StringLoc = StringID & 15;
if (Bundle.Data[StringLoc])
return createError("Multiple STRINGTABLE strings located under ID " +
Twine(StringID));
Bundle.Data[StringLoc] = String;
return Error::success();
}
Error ResourceFileWriter::writeStringTableBundleBody(const RCResource *Base) {
auto *Res = cast<BundleResource>(Base);
for (size_t ID = 0; ID < Res->Bundle.Data.size(); ++ID) {
// The string format is a tiny bit different here. We
// first output the size of the string, and then the string itself
// (which is not null-terminated).
SmallVector<UTF16, 128> Data;
if (Res->Bundle.Data[ID]) {
bool IsLongString;
for (StringRef S : *Res->Bundle.Data[ID])
RETURN_IF_ERROR(processString(S, NullHandlingMethod::CutAtDoubleNull,
IsLongString, Data, Params.CodePage));
if (AppendNull)
Data.push_back('\0');
}
RETURN_IF_ERROR(
checkNumberFits<uint16_t>(Data.size(), "STRINGTABLE string size"));
writeInt<uint16_t>(Data.size());
for (auto Char : Data)
writeInt(Char);
}
return Error::success();
}
Error ResourceFileWriter::dumpAllStringTables() {
for (auto Key : StringTableData.BundleList) {
auto Iter = StringTableData.BundleData.find(Key);
assert(Iter != StringTableData.BundleData.end());
// For a moment, revert the context info to moment of bundle declaration.
ContextKeeper RAII(this);
ObjectData = Iter->second.DeclTimeInfo;
BundleResource Res(Iter->second);
// Bundle #(k+1) contains keys [16k, 16k + 15].
Res.setName(Key.first + 1);
RETURN_IF_ERROR(visitStringTableBundle(&Res));
}
return Error::success();
}
// --- UserDefinedResource helpers. --- //
Error ResourceFileWriter::writeUserDefinedBody(const RCResource *Base) {
auto *Res = cast<UserDefinedResource>(Base);
if (Res->IsFileResource)
return appendFile(Res->FileLoc);
for (auto &Elem : Res->Contents) {
if (Elem.isInt()) {
RETURN_IF_ERROR(
checkRCInt(Elem.getInt(), "Number in user-defined resource"));
writeRCInt(Elem.getInt());
continue;
}
SmallVector<UTF16, 128> ProcessedString;
bool IsLongString;
RETURN_IF_ERROR(
processString(Elem.getString(), NullHandlingMethod::UserResource,
IsLongString, ProcessedString, Params.CodePage));
for (auto Ch : ProcessedString) {
if (IsLongString) {
writeInt(Ch);
continue;
}
RETURN_IF_ERROR(checkNumberFits<uint8_t>(
Ch, "Character in narrow string in user-defined resource"));
writeInt<uint8_t>(Ch);
}
}
return Error::success();
}
// --- VersionInfoResourceResource helpers. --- //
Error ResourceFileWriter::writeVersionInfoBlock(const VersionInfoBlock &Blk) {
// Output the header if the block has name.
bool OutputHeader = Blk.Name != "";
uint64_t LengthLoc;
padStream(sizeof(uint32_t));
if (OutputHeader) {
LengthLoc = writeInt<uint16_t>(0);
writeInt<uint16_t>(0);
writeInt<uint16_t>(1); // true
RETURN_IF_ERROR(writeCString(Blk.Name));
padStream(sizeof(uint32_t));
}
for (const std::unique_ptr<VersionInfoStmt> &Item : Blk.Stmts) {
VersionInfoStmt *ItemPtr = Item.get();
if (auto *BlockPtr = dyn_cast<VersionInfoBlock>(ItemPtr)) {
RETURN_IF_ERROR(writeVersionInfoBlock(*BlockPtr));
continue;
}
auto *ValuePtr = cast<VersionInfoValue>(ItemPtr);
RETURN_IF_ERROR(writeVersionInfoValue(*ValuePtr));
}
if (OutputHeader) {
uint64_t CurLoc = tell();
writeObjectAt(ulittle16_t(CurLoc - LengthLoc), LengthLoc);
}
return Error::success();
}
Error ResourceFileWriter::writeVersionInfoValue(const VersionInfoValue &Val) {
// rc has a peculiar algorithm to output VERSIONINFO VALUEs. Each VALUE
// is a mapping from the key (string) to the value (a sequence of ints or
// a sequence of strings).
//
// If integers are to be written: width of each integer written depends on
// whether it's been declared 'long' (it's DWORD then) or not (it's WORD).
// ValueLength defined in structure referenced below is then the total
// number of bytes taken by these integers.
//
// If strings are to be written: characters are always WORDs.
// Moreover, '\0' character is written after the last string, and between
// every two strings separated by comma (if strings are not comma-separated,
// they're simply concatenated). ValueLength is equal to the number of WORDs
// written (that is, half of the bytes written).
//
// Ref: msdn.microsoft.com/en-us/library/windows/desktop/ms646994.aspx
bool HasStrings = false, HasInts = false;
for (auto &Item : Val.Values)
(Item.isInt() ? HasInts : HasStrings) = true;
assert((HasStrings || HasInts) && "VALUE must have at least one argument");
if (HasStrings && HasInts)
return createError(Twine("VALUE ") + Val.Key +
" cannot contain both strings and integers");
padStream(sizeof(uint32_t));
auto LengthLoc = writeInt<uint16_t>(0);
auto ValLengthLoc = writeInt<uint16_t>(0);
writeInt<uint16_t>(HasStrings);
RETURN_IF_ERROR(writeCString(Val.Key));
padStream(sizeof(uint32_t));
auto DataLoc = tell();
for (size_t Id = 0; Id < Val.Values.size(); ++Id) {
auto &Item = Val.Values[Id];
if (Item.isInt()) {
auto Value = Item.getInt();
RETURN_IF_ERROR(checkRCInt(Value, "VERSIONINFO integer value"));
writeRCInt(Value);
continue;
}
bool WriteTerminator =
Id == Val.Values.size() - 1 || Val.HasPrecedingComma[Id + 1];
RETURN_IF_ERROR(writeCString(Item.getString(), WriteTerminator));
}
auto CurLoc = tell();
auto ValueLength = CurLoc - DataLoc;
if (HasStrings) {
assert(ValueLength % 2 == 0);
ValueLength /= 2;
}
writeObjectAt(ulittle16_t(CurLoc - LengthLoc), LengthLoc);
writeObjectAt(ulittle16_t(ValueLength), ValLengthLoc);
return Error::success();
}
template <typename Ty>
static Ty getWithDefault(const StringMap<Ty> &Map, StringRef Key,
const Ty &Default) {
auto Iter = Map.find(Key);
if (Iter != Map.end())
return Iter->getValue();
return Default;
}
Error ResourceFileWriter::writeVersionInfoBody(const RCResource *Base) {
auto *Res = cast<VersionInfoResource>(Base);
const auto &FixedData = Res->FixedData;
struct /* VS_FIXEDFILEINFO */ {
ulittle32_t Signature = ulittle32_t(0xFEEF04BD);
ulittle32_t StructVersion = ulittle32_t(0x10000);
// It's weird to have most-significant DWORD first on the little-endian
// machines, but let it be this way.
ulittle32_t FileVersionMS;
ulittle32_t FileVersionLS;
ulittle32_t ProductVersionMS;
ulittle32_t ProductVersionLS;
ulittle32_t FileFlagsMask;
ulittle32_t FileFlags;
ulittle32_t FileOS;
ulittle32_t FileType;
ulittle32_t FileSubtype;
// MS implementation seems to always set these fields to 0.
ulittle32_t FileDateMS = ulittle32_t(0);
ulittle32_t FileDateLS = ulittle32_t(0);
} FixedInfo;
// First, VS_VERSIONINFO.
auto LengthLoc = writeInt<uint16_t>(0);
writeInt<uint16_t>(sizeof(FixedInfo));
writeInt<uint16_t>(0);
cantFail(writeCString("VS_VERSION_INFO"));
padStream(sizeof(uint32_t));
using VersionInfoFixed = VersionInfoResource::VersionInfoFixed;
auto GetField = [&](VersionInfoFixed::VersionInfoFixedType Type) {
static const SmallVector<uint32_t, 4> DefaultOut{0, 0, 0, 0};
if (!FixedData.IsTypePresent[(int)Type])
return DefaultOut;
return FixedData.FixedInfo[(int)Type];
};
auto FileVer = GetField(VersionInfoFixed::FtFileVersion);
RETURN_IF_ERROR(checkNumberFits<uint16_t>(
*std::max_element(FileVer.begin(), FileVer.end()), "FILEVERSION fields"));
FixedInfo.FileVersionMS = (FileVer[0] << 16) | FileVer[1];
FixedInfo.FileVersionLS = (FileVer[2] << 16) | FileVer[3];
auto ProdVer = GetField(VersionInfoFixed::FtProductVersion);
RETURN_IF_ERROR(checkNumberFits<uint16_t>(
*std::max_element(ProdVer.begin(), ProdVer.end()),
"PRODUCTVERSION fields"));
FixedInfo.ProductVersionMS = (ProdVer[0] << 16) | ProdVer[1];
FixedInfo.ProductVersionLS = (ProdVer[2] << 16) | ProdVer[3];
FixedInfo.FileFlagsMask = GetField(VersionInfoFixed::FtFileFlagsMask)[0];
FixedInfo.FileFlags = GetField(VersionInfoFixed::FtFileFlags)[0];
FixedInfo.FileOS = GetField(VersionInfoFixed::FtFileOS)[0];
FixedInfo.FileType = GetField(VersionInfoFixed::FtFileType)[0];
FixedInfo.FileSubtype = GetField(VersionInfoFixed::FtFileSubtype)[0];
writeObject(FixedInfo);
padStream(sizeof(uint32_t));
RETURN_IF_ERROR(writeVersionInfoBlock(Res->MainBlock));
// FIXME: check overflow?
writeObjectAt(ulittle16_t(tell() - LengthLoc), LengthLoc);
return Error::success();
}
Expected<std::unique_ptr<MemoryBuffer>>
ResourceFileWriter::loadFile(StringRef File) const {
SmallString<128> Path;
SmallString<128> Cwd;
std::unique_ptr<MemoryBuffer> Result;
// 0. The file path is absolute and the file exists.
if (sys::path::is_absolute(File))
return errorOrToExpected(MemoryBuffer::getFile(File, -1, false));
// 1. The current working directory.
sys::fs::current_path(Cwd);
Path.assign(Cwd.begin(), Cwd.end());
sys::path::append(Path, File);
if (sys::fs::exists(Path))
return errorOrToExpected(MemoryBuffer::getFile(Path, -1, false));
// 2. The directory of the input resource file, if it is different from the
// current working directory.
StringRef InputFileDir = sys::path::parent_path(Params.InputFilePath);
Path.assign(InputFileDir.begin(), InputFileDir.end());
sys::path::append(Path, File);
if (sys::fs::exists(Path))
return errorOrToExpected(MemoryBuffer::getFile(Path, -1, false));
// 3. All of the include directories specified on the command line.
for (StringRef ForceInclude : Params.Include) {
Path.assign(ForceInclude.begin(), ForceInclude.end());
sys::path::append(Path, File);
if (sys::fs::exists(Path))
return errorOrToExpected(MemoryBuffer::getFile(Path, -1, false));
}
if (auto Result =
llvm::sys::Process::FindInEnvPath("INCLUDE", File, Params.NoInclude))
return errorOrToExpected(MemoryBuffer::getFile(*Result, -1, false));
return make_error<StringError>("error : file not found : " + Twine(File),
inconvertibleErrorCode());
}
} // namespace rc
} // namespace llvm
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