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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/Support/raw_ostream.h"
using namespace llvm;
std::string Twine::str() const {
std::string Res;
raw_string_ostream OS(Res);
print(OS);
return Res;
}
void Twine::toVector(SmallVectorImpl<char> &Out) const {
// FIXME: This is very inefficient, since we are creating a large raw_ostream
// buffer -- hitting malloc, which we were supposed to avoid -- all when we
// have this pretty little small vector available.
//
// The best way to fix this is to make raw_svector_ostream do the right thing
// and be efficient, by augmenting the base raw_ostream with the ability to
// have the buffer managed by a concrete implementation.
raw_svector_ostream OS(Out);
print(OS);
}
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::UDec32Kind:
OS << *static_cast<const uint32_t*>(Ptr);
break;
case Twine::SDec32Kind:
OS << *static_cast<const int32_t*>(Ptr);
break;
case Twine::UDec64Kind:
OS << *static_cast<const uint64_t*>(Ptr);
break;
case Twine::SDec64Kind:
OS << *static_cast<const int64_t*>(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::UDec32Kind:
OS << "udec32:" << static_cast<const uint64_t*>(Ptr) << "\"";
break;
case Twine::SDec32Kind:
OS << "sdec32:" << static_cast<const int64_t*>(Ptr) << "\"";
break;
case Twine::UDec64Kind:
OS << "udec64:" << static_cast<const uint64_t*>(Ptr) << "\"";
break;
case Twine::SDec64Kind:
OS << "sdec64:" << static_cast<const int64_t*>(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::errs());
}
void Twine::dumpRepr() const {
printRepr(llvm::errs());
}
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