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      1 //===--- ArgList.cpp - Argument List Management ---------------------------===//
      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/Option/ArgList.h"
     11 #include "llvm/ADT/SmallString.h"
     12 #include "llvm/ADT/Twine.h"
     13 #include "llvm/Option/Arg.h"
     14 #include "llvm/Option/Option.h"
     15 #include "llvm/Support/raw_ostream.h"
     16 
     17 using namespace llvm;
     18 using namespace llvm::opt;
     19 
     20 void arg_iterator::SkipToNextArg() {
     21   for (; Current != Args.end(); ++Current) {
     22     // Done if there are no filters.
     23     if (!Id0.isValid())
     24       break;
     25 
     26     // Otherwise require a match.
     27     const Option &O = (*Current)->getOption();
     28     if (O.matches(Id0) ||
     29         (Id1.isValid() && O.matches(Id1)) ||
     30         (Id2.isValid() && O.matches(Id2)))
     31       break;
     32   }
     33 }
     34 
     35 //
     36 
     37 ArgList::ArgList() {
     38 }
     39 
     40 ArgList::~ArgList() {
     41 }
     42 
     43 void ArgList::append(Arg *A) {
     44   Args.push_back(A);
     45 }
     46 
     47 void ArgList::eraseArg(OptSpecifier Id) {
     48   for (iterator it = begin(), ie = end(); it != ie; ) {
     49     if ((*it)->getOption().matches(Id)) {
     50       it = Args.erase(it);
     51       ie = end();
     52     } else {
     53       ++it;
     54     }
     55   }
     56 }
     57 
     58 Arg *ArgList::getLastArgNoClaim(OptSpecifier Id) const {
     59   // FIXME: Make search efficient?
     60   for (const_reverse_iterator it = rbegin(), ie = rend(); it != ie; ++it)
     61     if ((*it)->getOption().matches(Id))
     62       return *it;
     63   return 0;
     64 }
     65 
     66 Arg *ArgList::getLastArg(OptSpecifier Id) const {
     67   Arg *Res = 0;
     68   for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
     69     if ((*it)->getOption().matches(Id)) {
     70       Res = *it;
     71       Res->claim();
     72     }
     73   }
     74 
     75   return Res;
     76 }
     77 
     78 Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1) const {
     79   Arg *Res = 0;
     80   for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
     81     if ((*it)->getOption().matches(Id0) ||
     82         (*it)->getOption().matches(Id1)) {
     83       Res = *it;
     84       Res->claim();
     85 
     86     }
     87   }
     88 
     89   return Res;
     90 }
     91 
     92 Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1,
     93                          OptSpecifier Id2) const {
     94   Arg *Res = 0;
     95   for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
     96     if ((*it)->getOption().matches(Id0) ||
     97         (*it)->getOption().matches(Id1) ||
     98         (*it)->getOption().matches(Id2)) {
     99       Res = *it;
    100       Res->claim();
    101     }
    102   }
    103 
    104   return Res;
    105 }
    106 
    107 Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1,
    108                          OptSpecifier Id2, OptSpecifier Id3) const {
    109   Arg *Res = 0;
    110   for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
    111     if ((*it)->getOption().matches(Id0) ||
    112         (*it)->getOption().matches(Id1) ||
    113         (*it)->getOption().matches(Id2) ||
    114         (*it)->getOption().matches(Id3)) {
    115       Res = *it;
    116       Res->claim();
    117     }
    118   }
    119 
    120   return Res;
    121 }
    122 
    123 Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1,
    124                          OptSpecifier Id2, OptSpecifier Id3,
    125                          OptSpecifier Id4) const {
    126   Arg *Res = 0;
    127   for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
    128     if ((*it)->getOption().matches(Id0) ||
    129         (*it)->getOption().matches(Id1) ||
    130         (*it)->getOption().matches(Id2) ||
    131         (*it)->getOption().matches(Id3) ||
    132         (*it)->getOption().matches(Id4)) {
    133       Res = *it;
    134       Res->claim();
    135     }
    136   }
    137 
    138   return Res;
    139 }
    140 
    141 Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1,
    142                          OptSpecifier Id2, OptSpecifier Id3,
    143                          OptSpecifier Id4, OptSpecifier Id5) const {
    144   Arg *Res = 0;
    145   for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
    146     if ((*it)->getOption().matches(Id0) ||
    147         (*it)->getOption().matches(Id1) ||
    148         (*it)->getOption().matches(Id2) ||
    149         (*it)->getOption().matches(Id3) ||
    150         (*it)->getOption().matches(Id4) ||
    151         (*it)->getOption().matches(Id5)) {
    152       Res = *it;
    153       Res->claim();
    154     }
    155   }
    156 
    157   return Res;
    158 }
    159 
    160 Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1,
    161                          OptSpecifier Id2, OptSpecifier Id3,
    162                          OptSpecifier Id4, OptSpecifier Id5,
    163                          OptSpecifier Id6) const {
    164   Arg *Res = 0;
    165   for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
    166     if ((*it)->getOption().matches(Id0) ||
    167         (*it)->getOption().matches(Id1) ||
    168         (*it)->getOption().matches(Id2) ||
    169         (*it)->getOption().matches(Id3) ||
    170         (*it)->getOption().matches(Id4) ||
    171         (*it)->getOption().matches(Id5) ||
    172         (*it)->getOption().matches(Id6)) {
    173       Res = *it;
    174       Res->claim();
    175     }
    176   }
    177 
    178   return Res;
    179 }
    180 
    181 Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1,
    182                          OptSpecifier Id2, OptSpecifier Id3,
    183                          OptSpecifier Id4, OptSpecifier Id5,
    184                          OptSpecifier Id6, OptSpecifier Id7) const {
    185   Arg *Res = 0;
    186   for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
    187     if ((*it)->getOption().matches(Id0) ||
    188         (*it)->getOption().matches(Id1) ||
    189         (*it)->getOption().matches(Id2) ||
    190         (*it)->getOption().matches(Id3) ||
    191         (*it)->getOption().matches(Id4) ||
    192         (*it)->getOption().matches(Id5) ||
    193         (*it)->getOption().matches(Id6) ||
    194         (*it)->getOption().matches(Id7)) {
    195       Res = *it;
    196       Res->claim();
    197     }
    198   }
    199 
    200   return Res;
    201 }
    202 
    203 bool ArgList::hasFlag(OptSpecifier Pos, OptSpecifier Neg, bool Default) const {
    204   if (Arg *A = getLastArg(Pos, Neg))
    205     return A->getOption().matches(Pos);
    206   return Default;
    207 }
    208 
    209 bool ArgList::hasFlag(OptSpecifier Pos, OptSpecifier PosAlias, OptSpecifier Neg,
    210                       bool Default) const {
    211   if (Arg *A = getLastArg(Pos, PosAlias, Neg))
    212     return A->getOption().matches(Pos) || A->getOption().matches(PosAlias);
    213   return Default;
    214 }
    215 
    216 StringRef ArgList::getLastArgValue(OptSpecifier Id,
    217                                          StringRef Default) const {
    218   if (Arg *A = getLastArg(Id))
    219     return A->getValue();
    220   return Default;
    221 }
    222 
    223 std::vector<std::string> ArgList::getAllArgValues(OptSpecifier Id) const {
    224   SmallVector<const char *, 16> Values;
    225   AddAllArgValues(Values, Id);
    226   return std::vector<std::string>(Values.begin(), Values.end());
    227 }
    228 
    229 void ArgList::AddLastArg(ArgStringList &Output, OptSpecifier Id) const {
    230   if (Arg *A = getLastArg(Id)) {
    231     A->claim();
    232     A->render(*this, Output);
    233   }
    234 }
    235 
    236 void ArgList::AddLastArg(ArgStringList &Output, OptSpecifier Id0,
    237                          OptSpecifier Id1) const {
    238   if (Arg *A = getLastArg(Id0, Id1)) {
    239     A->claim();
    240     A->render(*this, Output);
    241   }
    242 }
    243 
    244 void ArgList::AddAllArgs(ArgStringList &Output, OptSpecifier Id0,
    245                          OptSpecifier Id1, OptSpecifier Id2) const {
    246   for (arg_iterator it = filtered_begin(Id0, Id1, Id2),
    247          ie = filtered_end(); it != ie; ++it) {
    248     (*it)->claim();
    249     (*it)->render(*this, Output);
    250   }
    251 }
    252 
    253 void ArgList::AddAllArgValues(ArgStringList &Output, OptSpecifier Id0,
    254                               OptSpecifier Id1, OptSpecifier Id2) const {
    255   for (arg_iterator it = filtered_begin(Id0, Id1, Id2),
    256          ie = filtered_end(); it != ie; ++it) {
    257     (*it)->claim();
    258     for (unsigned i = 0, e = (*it)->getNumValues(); i != e; ++i)
    259       Output.push_back((*it)->getValue(i));
    260   }
    261 }
    262 
    263 void ArgList::AddAllArgsTranslated(ArgStringList &Output, OptSpecifier Id0,
    264                                    const char *Translation,
    265                                    bool Joined) const {
    266   for (arg_iterator it = filtered_begin(Id0),
    267          ie = filtered_end(); it != ie; ++it) {
    268     (*it)->claim();
    269 
    270     if (Joined) {
    271       Output.push_back(MakeArgString(StringRef(Translation) +
    272                                      (*it)->getValue(0)));
    273     } else {
    274       Output.push_back(Translation);
    275       Output.push_back((*it)->getValue(0));
    276     }
    277   }
    278 }
    279 
    280 void ArgList::ClaimAllArgs(OptSpecifier Id0) const {
    281   for (arg_iterator it = filtered_begin(Id0),
    282          ie = filtered_end(); it != ie; ++it)
    283     (*it)->claim();
    284 }
    285 
    286 void ArgList::ClaimAllArgs() const {
    287   for (const_iterator it = begin(), ie = end(); it != ie; ++it)
    288     if (!(*it)->isClaimed())
    289       (*it)->claim();
    290 }
    291 
    292 const char *ArgList::MakeArgString(const Twine &T) const {
    293   SmallString<256> Str;
    294   T.toVector(Str);
    295   return MakeArgString(Str.str());
    296 }
    297 
    298 const char *ArgList::GetOrMakeJoinedArgString(unsigned Index,
    299                                               StringRef LHS,
    300                                               StringRef RHS) const {
    301   StringRef Cur = getArgString(Index);
    302   if (Cur.size() == LHS.size() + RHS.size() &&
    303       Cur.startswith(LHS) && Cur.endswith(RHS))
    304     return Cur.data();
    305 
    306   return MakeArgString(LHS + RHS);
    307 }
    308 
    309 //
    310 
    311 InputArgList::InputArgList(const char* const *ArgBegin,
    312                            const char* const *ArgEnd)
    313   : NumInputArgStrings(ArgEnd - ArgBegin) {
    314   ArgStrings.append(ArgBegin, ArgEnd);
    315 }
    316 
    317 InputArgList::~InputArgList() {
    318   // An InputArgList always owns its arguments.
    319   for (iterator it = begin(), ie = end(); it != ie; ++it)
    320     delete *it;
    321 }
    322 
    323 unsigned InputArgList::MakeIndex(StringRef String0) const {
    324   unsigned Index = ArgStrings.size();
    325 
    326   // Tuck away so we have a reliable const char *.
    327   SynthesizedStrings.push_back(String0);
    328   ArgStrings.push_back(SynthesizedStrings.back().c_str());
    329 
    330   return Index;
    331 }
    332 
    333 unsigned InputArgList::MakeIndex(StringRef String0,
    334                                  StringRef String1) const {
    335   unsigned Index0 = MakeIndex(String0);
    336   unsigned Index1 = MakeIndex(String1);
    337   assert(Index0 + 1 == Index1 && "Unexpected non-consecutive indices!");
    338   (void) Index1;
    339   return Index0;
    340 }
    341 
    342 const char *InputArgList::MakeArgString(StringRef Str) const {
    343   return getArgString(MakeIndex(Str));
    344 }
    345 
    346 //
    347 
    348 DerivedArgList::DerivedArgList(const InputArgList &_BaseArgs)
    349   : BaseArgs(_BaseArgs) {
    350 }
    351 
    352 DerivedArgList::~DerivedArgList() {
    353   // We only own the arguments we explicitly synthesized.
    354   for (iterator it = SynthesizedArgs.begin(), ie = SynthesizedArgs.end();
    355        it != ie; ++it)
    356     delete *it;
    357 }
    358 
    359 const char *DerivedArgList::MakeArgString(StringRef Str) const {
    360   return BaseArgs.MakeArgString(Str);
    361 }
    362 
    363 Arg *DerivedArgList::MakeFlagArg(const Arg *BaseArg, const Option Opt) const {
    364   Arg *A = new Arg(Opt, ArgList::MakeArgString(Twine(Opt.getPrefix()) +
    365                                                Twine(Opt.getName())),
    366                    BaseArgs.MakeIndex(Opt.getName()), BaseArg);
    367   SynthesizedArgs.push_back(A);
    368   return A;
    369 }
    370 
    371 Arg *DerivedArgList::MakePositionalArg(const Arg *BaseArg, const Option Opt,
    372                                        StringRef Value) const {
    373   unsigned Index = BaseArgs.MakeIndex(Value);
    374   Arg *A = new Arg(Opt, ArgList::MakeArgString(Twine(Opt.getPrefix()) +
    375                                                Twine(Opt.getName())),
    376                    Index, BaseArgs.getArgString(Index), BaseArg);
    377   SynthesizedArgs.push_back(A);
    378   return A;
    379 }
    380 
    381 Arg *DerivedArgList::MakeSeparateArg(const Arg *BaseArg, const Option Opt,
    382                                      StringRef Value) const {
    383   unsigned Index = BaseArgs.MakeIndex(Opt.getName(), Value);
    384   Arg *A = new Arg(Opt, ArgList::MakeArgString(Twine(Opt.getPrefix()) +
    385                                                Twine(Opt.getName())),
    386                    Index, BaseArgs.getArgString(Index + 1), BaseArg);
    387   SynthesizedArgs.push_back(A);
    388   return A;
    389 }
    390 
    391 Arg *DerivedArgList::MakeJoinedArg(const Arg *BaseArg, const Option Opt,
    392                                    StringRef Value) const {
    393   unsigned Index = BaseArgs.MakeIndex(Opt.getName().str() + Value.str());
    394   Arg *A = new Arg(Opt, ArgList::MakeArgString(Twine(Opt.getPrefix()) +
    395                                                Twine(Opt.getName())), Index,
    396                    BaseArgs.getArgString(Index) + Opt.getName().size(),
    397                    BaseArg);
    398   SynthesizedArgs.push_back(A);
    399   return A;
    400 }
    401