lib/Support/Twine.cpp

   1 //===-- Twine.cpp - Fast Temporary String Concatenation -------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "llvm/ADT/Twine.h"
  11 #include "llvm/ADT/SmallString.h"
  12 #include "llvm/Support/Debug.h"
  13 #include "llvm/Support/raw_ostream.h"
  14 using namespace llvm;
  15
  16 std::string Twine::str() const {
  17   SmallString<256> Vec;
  18   return toStringRef(Vec).str();
  19 }
  20
  21 void Twine::toVector(SmallVectorImpl<char> &Out) const {
  22   raw_svector_ostream OS(Out);
  23   print(OS);
  24 }
  25
  26 StringRef Twine::toStringRef(SmallVectorImpl<char> &Out) const {
  27   if (isSingleStringRef())
  28     return getSingleStringRef();
  29   toVector(Out);
  30   return StringRef(Out.data(), Out.size());
  31 }
  32
  33 void Twine::printOneChild(raw_ostream &OS, const void *Ptr,
  34                           NodeKind Kind) const {
  35   switch (Kind) {
  36   case Twine::NullKind: break;
  37   case Twine::EmptyKind: break;
  38   case Twine::TwineKind:
  39     static_cast<const Twine*>(Ptr)->print(OS);
  40     break;
  41   case Twine::CStringKind:
  42     OS << static_cast<const char*>(Ptr);
  43     break;
  44   case Twine::StdStringKind:
  45     OS << *static_cast<const std::string*>(Ptr);
  46     break;
  47   case Twine::StringRefKind:
  48     OS << *static_cast<const StringRef*>(Ptr);
  49     break;
  50   case Twine::DecUIKind:
  51     OS << (unsigned)(uintptr_t)Ptr;
  52     break;
  53   case Twine::DecIKind:
  54     OS << (int)(intptr_t)Ptr;
  55     break;
  56   case Twine::DecULKind:
  57     OS << *static_cast<const unsigned long*>(Ptr);
  58     break;
  59   case Twine::DecLKind:
  60     OS << *static_cast<const long*>(Ptr);
  61     break;
  62   case Twine::DecULLKind:
  63     OS << *static_cast<const unsigned long long*>(Ptr);
  64     break;
  65   case Twine::DecLLKind:
  66     OS << *static_cast<const long long*>(Ptr);
  67     break;
  68   case Twine::UHexKind:
  69     OS.write_hex(*static_cast<const uint64_t*>(Ptr));
  70     break;
  71   }
  72 }
  73
  74 void Twine::printOneChildRepr(raw_ostream &OS, const void *Ptr,
  75                               NodeKind Kind) const {
  76   switch (Kind) {
  77   case Twine::NullKind:
  78     OS << "null"; break;
  79   case Twine::EmptyKind:
  80     OS << "empty"; break;
  81   case Twine::TwineKind:
  82     OS << "rope:";
  83     static_cast<const Twine*>(Ptr)->printRepr(OS);
  84     break;
  85   case Twine::CStringKind:
  86     OS << "cstring:\""
  87        << static_cast<const char*>(Ptr) << "\"";
  88     break;
  89   case Twine::StdStringKind:
  90     OS << "std::string:\""
  91        << static_cast<const std::string*>(Ptr) << "\"";
  92     break;
  93   case Twine::StringRefKind:
  94     OS << "stringref:\""
  95        << static_cast<const StringRef*>(Ptr) << "\"";
  96     break;
  97   case Twine::DecUIKind:
  98     OS << "decUI:\"" << (unsigned)(uintptr_t)Ptr << "\"";
  99     break;
 100   case Twine::DecIKind:
 101     OS << "decI:\"" << (int)(intptr_t)Ptr << "\"";
 102     break;
 103   case Twine::DecULKind:
 104     OS << "decUL:\"" << *static_cast<const unsigned long*>(Ptr) << "\"";
 105     break;
 106   case Twine::DecLKind:
 107     OS << "decL:\"" << *static_cast<const long*>(Ptr) << "\"";
 108     break;
 109   case Twine::DecULLKind:
 110     OS << "decULL:\"" << *static_cast<const unsigned long long*>(Ptr) << "\"";
 111     break;
 112   case Twine::DecLLKind:
 113     OS << "decLL:\"" << *static_cast<const long long*>(Ptr) << "\"";
 114     break;
 115   case Twine::UHexKind:
 116     OS << "uhex:\"" << static_cast<const uint64_t*>(Ptr) << "\"";
 117     break;
 118   }
 119 }
 120
 121 void Twine::print(raw_ostream &OS) const {
 122   printOneChild(OS, LHS, getLHSKind());
 123   printOneChild(OS, RHS, getRHSKind());
 124 }
 125
 126 void Twine::printRepr(raw_ostream &OS) const {
 127   OS << "(Twine ";
 128   printOneChildRepr(OS, LHS, getLHSKind());
 129   OS << " ";
 130   printOneChildRepr(OS, RHS, getRHSKind());
 131   OS << ")";
 132 }
 133
 134 void Twine::dump() const {
 135   print(llvm::dbgs());
 136 }
 137
 138 void Twine::dumpRepr() const {
 139   printRepr(llvm::dbgs());
 140 }