mirror of https://github.com/libAthena/athena.git
457 lines
21 KiB
C++
457 lines
21 KiB
C++
#include "clang/AST/ASTConsumer.h"
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#include "clang/AST/RecursiveASTVisitor.h"
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#include "clang/Frontend/CompilerInstance.h"
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#include "clang/Frontend/FrontendAction.h"
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#include "clang/Tooling/Tooling.h"
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#include "clang/Lex/Preprocessor.h"
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#include "clang/Sema/Sema.h"
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#include "clang/AST/RecordLayout.h"
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#include "clang/AST/DeclCXX.h"
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#include "clang/Basic/Version.h"
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#include "llvm/Support/Format.h"
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#include "llvm/Support/CommandLine.h"
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#ifndef SYSTEM_PREFIX
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#define SYSTEM_PREFIX /usr/local
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#endif
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#define XSTR(s) STR(s)
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#define STR(s) #s
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static llvm::cl::opt<bool> Help("h", llvm::cl::desc("Alias for -help"), llvm::cl::Hidden);
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static llvm::cl::OptionCategory ATDNAFormatCategory("atdna options");
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static llvm::cl::opt<std::string> OutputFilename("o",
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llvm::cl::desc("Specify output filename"),
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llvm::cl::value_desc("filename"),
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llvm::cl::Prefix);
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static llvm::cl::list<std::string> InputFilenames(llvm::cl::Positional,
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llvm::cl::desc("<Input files>"),
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llvm::cl::OneOrMore);
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class ATDNAEmitVisitor : public clang::RecursiveASTVisitor<ATDNAEmitVisitor>
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{
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clang::ASTContext& context;
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llvm::raw_fd_ostream& fileOut;
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std::string GetOpString(const clang::Type* theType, unsigned width,
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std::string fieldName, bool writerPass)
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{
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if (writerPass)
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{
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if (theType->isBuiltinType())
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{
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const clang::BuiltinType* bType = (clang::BuiltinType*)theType;
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if (bType->isUnsignedInteger())
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{
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if (width == 8)
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return "writer.writeUByte(" + fieldName + ");";
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else if (width == 16)
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return "writer.writeUint16(" + fieldName + ");";
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else if (width == 32)
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return "writer.writeUint32(" + fieldName + ");";
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else if (width == 64)
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return "writer.writeUint64(" + fieldName + ");";
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}
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else if (bType->isSignedInteger())
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{
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if (width == 8)
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return "writer.writeByte(" + fieldName + ");";
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else if (width == 16)
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return "writer.writeInt16(" + fieldName + ");";
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else if (width == 32)
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return "writer.writeInt32(" + fieldName + ");";
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else if (width == 64)
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return "writer.writeInt64(" + fieldName + ");";
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}
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else if (bType->isFloatingPoint())
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{
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if (width == 32)
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return "writer.writeFloat(" + fieldName + ");";
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else if (width == 64)
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return "writer.writeDouble(" + fieldName + ");";
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}
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}
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else if (theType->isRecordType())
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{
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const clang::RecordDecl* rDecl = ((clang::RecordType*)theType)->getDecl();
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for (const clang::FieldDecl* field : rDecl->fields())
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{
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if (!field->getNameAsString().compare("clangVec"))
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{
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const clang::VectorType* vType = (clang::VectorType*)field->getType().getTypePtr();
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if (vType->isVectorType())
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{
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const clang::BuiltinType* eType = (clang::BuiltinType*)vType->getElementType().getTypePtr();
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if (!eType->isBuiltinType() || !eType->isFloatingPoint() ||
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context.getTypeInfo(eType).Width != 32)
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continue;
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if (vType->getNumElements() == 3)
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return "writer.writeVec3f(" + fieldName + ");";
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else if (vType->getNumElements() == 4)
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return "writer.writeVec4f(" + fieldName + ");";
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}
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}
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}
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}
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}
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else
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{
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if (theType->isBuiltinType())
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{
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const clang::BuiltinType* bType = (clang::BuiltinType*)theType;
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if (bType->isUnsignedInteger())
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{
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if (width == 8)
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return "reader.readUByte()";
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else if (width == 16)
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return "reader.readUint16()";
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else if (width == 32)
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return "reader.readUint32()";
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else if (width == 64)
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return "reader.readUint64()";
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}
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else if (bType->isSignedInteger())
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{
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if (width == 8)
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return "reader.readByte()";
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else if (width == 16)
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return "reader.readInt16()";
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else if (width == 32)
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return "reader.readInt32()";
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else if (width == 64)
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return "reader.readInt64()";
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}
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else if (bType->isFloatingPoint())
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{
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if (width == 32)
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return "reader.readFloat()";
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else if (width == 64)
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return "reader.readDouble()";
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}
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}
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else if (theType->isRecordType())
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{
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const clang::RecordDecl* rDecl = ((clang::RecordType*)theType)->getDecl();
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for (const clang::FieldDecl* field : rDecl->fields())
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{
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if (!field->getNameAsString().compare("clangVec"))
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{
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const clang::VectorType* vType = (clang::VectorType*)field->getType().getTypePtr();
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if (vType->isVectorType())
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{
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const clang::BuiltinType* eType = (clang::BuiltinType*)vType->getElementType().getTypePtr();
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if (!eType->isBuiltinType() || !eType->isFloatingPoint() ||
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context.getTypeInfo(eType).Width != 32)
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continue;
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if (vType->getNumElements() == 3)
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return "reader.readVec3f()";
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else if (vType->getNumElements() == 4)
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return "reader.readVec4f()";
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}
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}
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}
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}
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}
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return std::string();
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}
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public:
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explicit ATDNAEmitVisitor(clang::ASTContext& ctxin,
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llvm::raw_fd_ostream& fo)
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: context(ctxin), fileOut(fo) {}
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bool VisitCXXRecordDecl(clang::CXXRecordDecl* decl)
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{
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if (decl->isInvalidDecl() || !decl->hasDefinition())
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return true;
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if (!decl->getNumBases())
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return true;
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/* First ensure this inherits from struct Athena::io::DNA */
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bool foundDNA = false;
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for (const clang::CXXBaseSpecifier& base : decl->bases())
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{
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clang::QualType canonType = base.getType().getCanonicalType();
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if (!canonType.getAsString().compare(0, 22, "struct Athena::io::DNA"))
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{
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foundDNA = true;
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break;
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}
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}
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if (!foundDNA)
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return true;
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for (int p=0 ; p<2 ; ++p)
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{
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if (p)
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fileOut << "void " << decl->getQualifiedNameAsString() << "::write(Athena::IStreamWriter& writer) const\n{\n";
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else
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fileOut << "void " << decl->getQualifiedNameAsString() << "::read(Athena::IStreamReader& reader)\n{\n";
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int currentEndian = -1;
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for (const clang::FieldDecl* field : decl->fields())
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{
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clang::QualType qualType = field->getType();
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clang::TypeInfo regTypeInfo = context.getTypeInfo(qualType);
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const clang::Type* regType = qualType.getTypePtrOrNull();
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if (regType->getTypeClass() == clang::Type::Elaborated)
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regType = regType->getUnqualifiedDesugaredType();
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if (regType->getTypeClass() == clang::Type::TemplateSpecialization)
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{
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const clang::TemplateSpecializationType* tsType = (const clang::TemplateSpecializationType*)regType;
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const clang::TemplateDecl* tsDecl = tsType->getTemplateName().getAsTemplateDecl();
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const clang::TemplateParameterList* classParms = tsDecl->getTemplateParameters();
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if (!tsDecl->getNameAsString().compare("Value"))
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{
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int endian = -1;
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if (classParms->size() >= 2)
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{
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const clang::NamedDecl* endianParm = classParms->getParam(1);
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if (endianParm->getKind() == clang::Decl::NonTypeTemplateParm)
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{
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const clang::NonTypeTemplateParmDecl* nttParm = (clang::NonTypeTemplateParmDecl*)endianParm;
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const clang::Expr* defArg = nttParm->getDefaultArgument();
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llvm::APSInt result;
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if (defArg->isIntegerConstantExpr(result, context))
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endian = result.getSExtValue();
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}
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}
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std::string ioOp;
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const clang::TemplateArgument* typeArg = nullptr;
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for (const clang::TemplateArgument& arg : *tsType)
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{
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if (arg.getKind() == clang::TemplateArgument::Type)
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{
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typeArg = &arg;
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const clang::Type* type = arg.getAsType().getCanonicalType().getTypePtr();
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ioOp = GetOpString(type, regTypeInfo.Width, field->getName().str(), p);
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}
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else if (arg.getKind() == clang::TemplateArgument::Expression)
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{
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llvm::APSInt value;
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if (arg.getAsExpr()->isIntegerConstantExpr(value, context))
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endian = value.getSExtValue();
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}
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}
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if (ioOp.empty())
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{
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clang::DiagnosticBuilder diag = context.getDiagnostics().Report(tsDecl->getLocation(), context.getDiagnostics().getCustomDiagID(clang::DiagnosticsEngine::Fatal, "Athena error"));
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diag.AddString("Unable to use type '" + tsDecl->getNameAsString() + "' with Athena");
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if (typeArg)
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diag.AddSourceRange(clang::CharSourceRange(clang::TemplateArgumentLoc(*typeArg, clang::TemplateArgumentLocInfo()).getSourceRange(), false));
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continue;
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}
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if (currentEndian != endian)
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{
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if (endian == 0)
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fileOut << (p ? " writer.setEndian(Athena::LittleEndian);\n" : " reader.setEndian(Athena::LittleEndian);\n");
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else if (endian == 1)
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fileOut << (p ? " writer.setEndian(Athena::BigEndian);\n" : " reader.setEndian(Athena::BigEndian);\n");
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currentEndian = endian;
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}
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if (!p)
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fileOut << " " << field->getName() << " = " << ioOp << ";\n";
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else
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fileOut << " " << ioOp << "\n";
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}
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else if (!tsDecl->getNameAsString().compare("Vector"))
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{
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int endian = -1;
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if (classParms->size() >= 3)
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{
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const clang::NamedDecl* endianParm = classParms->getParam(2);
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if (endianParm->getKind() == clang::Decl::NonTypeTemplateParm)
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{
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const clang::NonTypeTemplateParmDecl* nttParm = (clang::NonTypeTemplateParmDecl*)endianParm;
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const clang::Expr* defArg = nttParm->getDefaultArgument();
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llvm::APSInt result;
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if (defArg->isIntegerConstantExpr(result, context))
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endian = result.getSExtValue();
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}
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}
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std::string ioOp;
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std::string sizeVar;
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const clang::TemplateArgument* typeArg = nullptr;
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const clang::TemplateArgument* sizeArg = nullptr;
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size_t idx = 0;
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for (const clang::TemplateArgument& arg : *tsType)
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{
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if (arg.getKind() == clang::TemplateArgument::Type)
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{
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typeArg = &arg;
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const clang::Type* type = arg.getAsType().getCanonicalType().getTypePtr();
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clang::TypeInfo typeInfo = context.getTypeInfo(arg.getAsType().getCanonicalType());
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ioOp = GetOpString(type, typeInfo.Width, "*it", p);
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}
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else if (arg.getKind() == clang::TemplateArgument::Expression)
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{
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const clang::Expr* expr = arg.getAsExpr();
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if (idx == 1)
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{
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sizeArg = &arg;
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const clang::UnaryExprOrTypeTraitExpr* uExpr = (clang::UnaryExprOrTypeTraitExpr*)expr;
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if (uExpr->getStmtClass() == clang::Stmt::UnaryExprOrTypeTraitExprClass &&
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uExpr->getKind() == clang::UETT_SizeOf)
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{
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const clang::Expr* argExpr = uExpr->getArgumentExpr();
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while (argExpr->getStmtClass() == clang::Stmt::ParenExprClass)
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argExpr = ((clang::ParenExpr*)argExpr)->getSubExpr();
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if (argExpr->getStmtClass() == clang::Stmt::DeclRefExprClass)
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{
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const clang::DeclRefExpr* refExpr = (clang::DeclRefExpr*)argExpr;
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sizeVar = refExpr->getFoundDecl()->getNameAsString();
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}
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}
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}
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else if (idx == 2)
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{
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llvm::APSInt value;
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if (expr->isIntegerConstantExpr(value, context))
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endian = value.getSExtValue();
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}
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}
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++idx;
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}
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if (ioOp.empty())
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{
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clang::DiagnosticBuilder diag = context.getDiagnostics().Report(tsDecl->getLocation(), context.getDiagnostics().getCustomDiagID(clang::DiagnosticsEngine::Fatal, "Athena error"));
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diag.AddString("Unable to use type '" + tsDecl->getNameAsString() + "' with Athena");
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if (typeArg)
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diag.AddSourceRange(clang::CharSourceRange(clang::TemplateArgumentLoc(*typeArg, clang::TemplateArgumentLocInfo()).getSourceRange(), false));
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continue;
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}
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if (sizeVar.empty())
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{
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clang::DiagnosticBuilder diag = context.getDiagnostics().Report(tsDecl->getLocation(), context.getDiagnostics().getCustomDiagID(clang::DiagnosticsEngine::Fatal, "Athena error"));
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diag.AddString("Unable to use type '" + tsDecl->getNameAsString() + "' with Athena");
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if (sizeArg)
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diag.AddSourceRange(clang::CharSourceRange(clang::TemplateArgumentLoc(*sizeArg, clang::TemplateArgumentLocInfo()).getSourceRange(), false));
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continue;
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}
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if (currentEndian != endian)
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{
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if (endian == 0)
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fileOut << (p ? " writer.setEndian(Athena::LittleEndian);\n" : " reader.setEndian(Athena::LittleEndian);\n");
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else if (endian == 1)
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fileOut << (p ? " writer.setEndian(Athena::BigEndian);\n" : " reader.setEndian(Athena::BigEndian);\n");
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currentEndian = endian;
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}
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if (!p)
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{
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fileOut << " " << field->getName() << ".clear();\n";
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fileOut << " " << field->getName() << ".reserve(" << sizeVar << ");\n";
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fileOut << " for (int i=0 ; i<" << sizeVar << " ; ++i)\n " << field->getName() << ".push_back(" << ioOp << ");\n";
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}
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else
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fileOut << " for (int i=0, auto it=" << field->getName() << ".begin() ; i<" << sizeVar << " && it!=" << field->getName() << ".end() ; ++i, ++it)\n " << ioOp << "\n";
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}
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}
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else if (regType->getTypeClass() == clang::Type::Record)
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{
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const clang::CXXRecordDecl* cxxRDecl = regType->getAsCXXRecordDecl();
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if (cxxRDecl)
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{
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for (const clang::CXXBaseSpecifier& base : cxxRDecl->bases())
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{
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clang::QualType canonType = base.getType().getCanonicalType();
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if (!canonType.getAsString().compare(0, 22, "struct Athena::io::DNA"))
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{
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fileOut << " " << field->getNameAsString() << (p ? ".write(writer);\n" : ".read(reader);\n");
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currentEndian = -1;
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break;
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}
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}
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}
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}
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}
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fileOut << "}\n\n";
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}
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return true;
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}
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};
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class ATDNAConsumer : public clang::ASTConsumer
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{
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ATDNAEmitVisitor emitVisitor;
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llvm::raw_fd_ostream& fileOut;
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public:
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explicit ATDNAConsumer(clang::ASTContext& context, llvm::raw_fd_ostream& fo)
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: emitVisitor(context, fo),
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fileOut(fo) {}
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void HandleTranslationUnit(clang::ASTContext& context)
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{
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/* Write file head */
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fileOut << "/* Auto generated atdna implementation */\n"
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"#include <Athena/Global.hpp>\n"
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"#include <Athena/IStreamReader.hpp>\n"
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"#include <Athena/IStreamWriter.hpp>\n\n";
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for (const std::string& inputf : InputFilenames)
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fileOut << "#include \"" << inputf << "\"\n";
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fileOut << "\n";
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/* Second pass - emit file */
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emitVisitor.TraverseDecl(context.getTranslationUnitDecl());
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}
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};
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class ATDNAAction : public clang::ASTFrontendAction
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{
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public:
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explicit ATDNAAction() {}
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std::unique_ptr<clang::ASTConsumer> CreateASTConsumer(clang::CompilerInstance& compiler,
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llvm::StringRef /*filename*/)
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{
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llvm::raw_fd_ostream* fileout;
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if (OutputFilename.size())
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fileout = compiler.createOutputFile(OutputFilename, false, true, "", "", true);
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else
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fileout = compiler.createDefaultOutputFile(false, "a", "cpp");
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return std::unique_ptr<clang::ASTConsumer>(new ATDNAConsumer(compiler.getASTContext(), *fileout));
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}
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};
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int main(int argc, const char** argv)
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{
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llvm::cl::ParseCommandLineOptions(argc, argv, "Athena DNA Generator");
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if (Help)
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llvm::cl::PrintHelpMessage();
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std::vector<std::string> args = {"clang-tool",
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"-fsyntax-only",
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"-std=c++11"};
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args.push_back("-I" + std::string(XSTR(SYSTEM_PREFIX)) + "/lib/clang/" + CLANG_VERSION_STRING + "/include");
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llvm::outs() << args.back() << "\n";
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for (int a=1 ; a<argc ; ++a)
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args.push_back(argv[a]);
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llvm::IntrusiveRefCntPtr<clang::FileManager> fman(new clang::FileManager(clang::FileSystemOptions()));
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clang::tooling::ToolInvocation TI(args, new ATDNAAction, fman.get());
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if (TI.run())
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return 0;
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return -1;
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}
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