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//===-- Twine.cpp - Fast Temporary String Concatenation -------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/Twine.h"
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/Debug.h"
#include "llvm/Support/raw_ostream.h"
using namespace llvm;
std::string Twine::str() const {
// If we're storing only a std::string, just return it.
if (LHSKind == StdStringKind && RHSKind == EmptyKind)
return *static_cast<const std::string*>(LHS);
// Otherwise, flatten and copy the contents first.
SmallString<256> Vec;
return toStringRef(Vec).str();
}
void Twine::toVector(SmallVectorImpl<char> &Out) const {
raw_svector_ostream OS(Out);
print(OS);
}
StringRef Twine::toStringRef(SmallVectorImpl<char> &Out) const {
if (isSingleStringRef())
return getSingleStringRef();
toVector(Out);
return StringRef(Out.data(), Out.size());
}
StringRef Twine::toNullTerminatedStringRef(SmallVectorImpl<char> &Out) const {
if (isUnary()) {
switch (getLHSKind()) {
case CStringKind:
// Already null terminated, yay!
return StringRef(static_cast<const char*>(LHS));
case StdStringKind: {
const std::string *str = static_cast<const std::string*>(LHS);
return StringRef(str->c_str(), str->size());
}
default:
break;
}
}
toVector(Out);
Out.push_back(0);
Out.pop_back();
return StringRef(Out.data(), Out.size());
}
void Twine::printOneChild(raw_ostream &OS, const void *Ptr,
NodeKind Kind) const {
switch (Kind) {
case Twine::NullKind: break;
case Twine::EmptyKind: break;
case Twine::TwineKind:
static_cast<const Twine*>(Ptr)->print(OS);
break;
case Twine::CStringKind:
OS << static_cast<const char*>(Ptr);
break;
case Twine::StdStringKind:
OS << *static_cast<const std::string*>(Ptr);
break;
case Twine::StringRefKind:
OS << *static_cast<const StringRef*>(Ptr);
break;
case Twine::DecUIKind:
OS << (unsigned)(uintptr_t)Ptr;
break;
case Twine::DecIKind:
OS << (int)(intptr_t)Ptr;
break;
case Twine::DecULKind:
OS << *static_cast<const unsigned long*>(Ptr);
break;
case Twine::DecLKind:
OS << *static_cast<const long*>(Ptr);
break;
case Twine::DecULLKind:
OS << *static_cast<const unsigned long long*>(Ptr);
break;
case Twine::DecLLKind:
OS << *static_cast<const long long*>(Ptr);
break;
case Twine::UHexKind:
OS.write_hex(*static_cast<const uint64_t*>(Ptr));
break;
}
}
void Twine::printOneChildRepr(raw_ostream &OS, const void *Ptr,
NodeKind Kind) const {
switch (Kind) {
case Twine::NullKind:
OS << "null"; break;
case Twine::EmptyKind:
OS << "empty"; break;
case Twine::TwineKind:
OS << "rope:";
static_cast<const Twine*>(Ptr)->printRepr(OS);
break;
case Twine::CStringKind:
OS << "cstring:\""
<< static_cast<const char*>(Ptr) << "\"";
break;
case Twine::StdStringKind:
OS << "std::string:\""
<< static_cast<const std::string*>(Ptr) << "\"";
break;
case Twine::StringRefKind:
OS << "stringref:\""
<< static_cast<const StringRef*>(Ptr) << "\"";
break;
case Twine::DecUIKind:
OS << "decUI:\"" << (unsigned)(uintptr_t)Ptr << "\"";
break;
case Twine::DecIKind:
OS << "decI:\"" << (int)(intptr_t)Ptr << "\"";
break;
case Twine::DecULKind:
OS << "decUL:\"" << *static_cast<const unsigned long*>(Ptr) << "\"";
break;
case Twine::DecLKind:
OS << "decL:\"" << *static_cast<const long*>(Ptr) << "\"";
break;
case Twine::DecULLKind:
OS << "decULL:\"" << *static_cast<const unsigned long long*>(Ptr) << "\"";
break;
case Twine::DecLLKind:
OS << "decLL:\"" << *static_cast<const long long*>(Ptr) << "\"";
break;
case Twine::UHexKind:
OS << "uhex:\"" << static_cast<const uint64_t*>(Ptr) << "\"";
break;
}
}
void Twine::print(raw_ostream &OS) const {
printOneChild(OS, LHS, getLHSKind());
printOneChild(OS, RHS, getRHSKind());
}
void Twine::printRepr(raw_ostream &OS) const {
OS << "(Twine ";
printOneChildRepr(OS, LHS, getLHSKind());
OS << " ";
printOneChildRepr(OS, RHS, getRHSKind());
OS << ")";
}
void Twine::dump() const {
print(llvm::dbgs());
}
void Twine::dumpRepr() const {
printRepr(llvm::dbgs());
}
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