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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 "clang/Driver/ArgList.h"
     11 #include "clang/Driver/Arg.h"
     12 #include "clang/Driver/DriverDiagnostic.h"
     13 #include "clang/Driver/Option.h"
     14 
     15 #include "llvm/ADT/SmallString.h"
     16 #include "llvm/ADT/Twine.h"
     17 #include "llvm/Support/raw_ostream.h"
     18 
     19 using namespace clang;
     20 using namespace clang::driver;
     21 
     22 void arg_iterator::SkipToNextArg() {
     23   for (; Current != Args.end(); ++Current) {
     24     // Done if there are no filters.
     25     if (!Id0.isValid())
     26       break;
     27 
     28     // Otherwise require a match.
     29     const Option &O = (*Current)->getOption();
     30     if (O.matches(Id0) ||
     31         (Id1.isValid() && O.matches(Id1)) ||
     32         (Id2.isValid() && O.matches(Id2)))
     33       break;
     34   }
     35 }
     36 
     37 //
     38 
     39 ArgList::ArgList() {
     40 }
     41 
     42 ArgList::~ArgList() {
     43 }
     44 
     45 void ArgList::append(Arg *A) {
     46   Args.push_back(A);
     47 }
     48 
     49 void ArgList::eraseArg(OptSpecifier Id) {
     50   for (iterator it = begin(), ie = end(); it != ie; ) {
     51     if ((*it)->getOption().matches(Id)) {
     52       it = Args.erase(it);
     53       ie = end();
     54     } else {
     55       ++it;
     56     }
     57   }
     58 }
     59 
     60 Arg *ArgList::getLastArgNoClaim(OptSpecifier Id) const {
     61   // FIXME: Make search efficient?
     62   for (const_reverse_iterator it = rbegin(), ie = rend(); it != ie; ++it)
     63     if ((*it)->getOption().matches(Id))
     64       return *it;
     65   return 0;
     66 }
     67 
     68 Arg *ArgList::getLastArg(OptSpecifier Id) const {
     69   Arg *Res = 0;
     70   for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
     71     if ((*it)->getOption().matches(Id)) {
     72       Res = *it;
     73       Res->claim();
     74     }
     75   }
     76 
     77   return Res;
     78 }
     79 
     80 Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1) const {
     81   Arg *Res = 0;
     82   for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
     83     if ((*it)->getOption().matches(Id0) ||
     84         (*it)->getOption().matches(Id1)) {
     85       Res = *it;
     86       Res->claim();
     87 
     88     }
     89   }
     90 
     91   return Res;
     92 }
     93 
     94 Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1,
     95                          OptSpecifier Id2) const {
     96   Arg *Res = 0;
     97   for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
     98     if ((*it)->getOption().matches(Id0) ||
     99         (*it)->getOption().matches(Id1) ||
    100         (*it)->getOption().matches(Id2)) {
    101       Res = *it;
    102       Res->claim();
    103     }
    104   }
    105 
    106   return Res;
    107 }
    108 
    109 Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1,
    110                          OptSpecifier Id2, OptSpecifier Id3) const {
    111   Arg *Res = 0;
    112   for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
    113     if ((*it)->getOption().matches(Id0) ||
    114         (*it)->getOption().matches(Id1) ||
    115         (*it)->getOption().matches(Id2) ||
    116         (*it)->getOption().matches(Id3)) {
    117       Res = *it;
    118       Res->claim();
    119     }
    120   }
    121 
    122   return Res;
    123 }
    124 
    125 Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1,
    126                          OptSpecifier Id2, OptSpecifier Id3,
    127                          OptSpecifier Id4) const {
    128   Arg *Res = 0;
    129   for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
    130     if ((*it)->getOption().matches(Id0) ||
    131         (*it)->getOption().matches(Id1) ||
    132         (*it)->getOption().matches(Id2) ||
    133         (*it)->getOption().matches(Id3) ||
    134         (*it)->getOption().matches(Id4)) {
    135       Res = *it;
    136       Res->claim();
    137     }
    138   }
    139 
    140   return Res;
    141 }
    142 
    143 Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1,
    144                          OptSpecifier Id2, OptSpecifier Id3,
    145                          OptSpecifier Id4, OptSpecifier Id5) const {
    146   Arg *Res = 0;
    147   for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
    148     if ((*it)->getOption().matches(Id0) ||
    149         (*it)->getOption().matches(Id1) ||
    150         (*it)->getOption().matches(Id2) ||
    151         (*it)->getOption().matches(Id3) ||
    152         (*it)->getOption().matches(Id4) ||
    153         (*it)->getOption().matches(Id5)) {
    154       Res = *it;
    155       Res->claim();
    156     }
    157   }
    158 
    159   return Res;
    160 }
    161 
    162 Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1,
    163                          OptSpecifier Id2, OptSpecifier Id3,
    164                          OptSpecifier Id4, OptSpecifier Id5,
    165                          OptSpecifier Id6) const {
    166   Arg *Res = 0;
    167   for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
    168     if ((*it)->getOption().matches(Id0) ||
    169         (*it)->getOption().matches(Id1) ||
    170         (*it)->getOption().matches(Id2) ||
    171         (*it)->getOption().matches(Id3) ||
    172         (*it)->getOption().matches(Id4) ||
    173         (*it)->getOption().matches(Id5) ||
    174         (*it)->getOption().matches(Id6)) {
    175       Res = *it;
    176       Res->claim();
    177     }
    178   }
    179 
    180   return Res;
    181 }
    182 
    183 Arg *ArgList::getLastArg(OptSpecifier Id0, OptSpecifier Id1,
    184                          OptSpecifier Id2, OptSpecifier Id3,
    185                          OptSpecifier Id4, OptSpecifier Id5,
    186                          OptSpecifier Id6, OptSpecifier Id7) const {
    187   Arg *Res = 0;
    188   for (const_iterator it = begin(), ie = end(); it != ie; ++it) {
    189     if ((*it)->getOption().matches(Id0) ||
    190         (*it)->getOption().matches(Id1) ||
    191         (*it)->getOption().matches(Id2) ||
    192         (*it)->getOption().matches(Id3) ||
    193         (*it)->getOption().matches(Id4) ||
    194         (*it)->getOption().matches(Id5) ||
    195         (*it)->getOption().matches(Id6) ||
    196         (*it)->getOption().matches(Id7)) {
    197       Res = *it;
    198       Res->claim();
    199     }
    200   }
    201 
    202   return Res;
    203 }
    204 
    205 bool ArgList::hasFlag(OptSpecifier Pos, OptSpecifier Neg, bool Default) const {
    206   if (Arg *A = getLastArg(Pos, Neg))
    207     return A->getOption().matches(Pos);
    208   return Default;
    209 }
    210 
    211 StringRef ArgList::getLastArgValue(OptSpecifier Id,
    212                                          StringRef Default) const {
    213   if (Arg *A = getLastArg(Id))
    214     return A->getValue(*this);
    215   return Default;
    216 }
    217 
    218 int ArgList::getLastArgIntValue(OptSpecifier Id, int Default,
    219                                 clang::DiagnosticsEngine *Diags) const {
    220   int Res = Default;
    221 
    222   if (Arg *A = getLastArg(Id)) {
    223     if (StringRef(A->getValue(*this)).getAsInteger(10, Res)) {
    224       if (Diags)
    225         Diags->Report(diag::err_drv_invalid_int_value)
    226           << A->getAsString(*this) << A->getValue(*this);
    227     }
    228   }
    229 
    230   return Res;
    231 }
    232 
    233 std::vector<std::string> ArgList::getAllArgValues(OptSpecifier Id) const {
    234   SmallVector<const char *, 16> Values;
    235   AddAllArgValues(Values, Id);
    236   return std::vector<std::string>(Values.begin(), Values.end());
    237 }
    238 
    239 void ArgList::AddLastArg(ArgStringList &Output, OptSpecifier Id) const {
    240   if (Arg *A = getLastArg(Id)) {
    241     A->claim();
    242     A->render(*this, Output);
    243   }
    244 }
    245 
    246 void ArgList::AddAllArgs(ArgStringList &Output, OptSpecifier Id0,
    247                          OptSpecifier Id1, OptSpecifier Id2) const {
    248   for (arg_iterator it = filtered_begin(Id0, Id1, Id2),
    249          ie = filtered_end(); it != ie; ++it) {
    250     (*it)->claim();
    251     (*it)->render(*this, Output);
    252   }
    253 }
    254 
    255 void ArgList::AddAllArgValues(ArgStringList &Output, OptSpecifier Id0,
    256                               OptSpecifier Id1, OptSpecifier Id2) const {
    257   for (arg_iterator it = filtered_begin(Id0, Id1, Id2),
    258          ie = filtered_end(); it != ie; ++it) {
    259     (*it)->claim();
    260     for (unsigned i = 0, e = (*it)->getNumValues(); i != e; ++i)
    261       Output.push_back((*it)->getValue(*this, i));
    262   }
    263 }
    264 
    265 void ArgList::AddAllArgsTranslated(ArgStringList &Output, OptSpecifier Id0,
    266                                    const char *Translation,
    267                                    bool Joined) const {
    268   for (arg_iterator it = filtered_begin(Id0),
    269          ie = filtered_end(); it != ie; ++it) {
    270     (*it)->claim();
    271 
    272     if (Joined) {
    273       Output.push_back(MakeArgString(StringRef(Translation) +
    274                                      (*it)->getValue(*this, 0)));
    275     } else {
    276       Output.push_back(Translation);
    277       Output.push_back((*it)->getValue(*this, 0));
    278     }
    279   }
    280 }
    281 
    282 void ArgList::ClaimAllArgs(OptSpecifier Id0) const {
    283   for (arg_iterator it = filtered_begin(Id0),
    284          ie = filtered_end(); it != ie; ++it)
    285     (*it)->claim();
    286 }
    287 
    288 void ArgList::ClaimAllArgs() const {
    289   for (const_iterator it = begin(), ie = end(); it != ie; ++it)
    290     if (!(*it)->isClaimed())
    291       (*it)->claim();
    292 }
    293 
    294 const char *ArgList::MakeArgString(const Twine &T) const {
    295   SmallString<256> Str;
    296   T.toVector(Str);
    297   return MakeArgString(Str.str());
    298 }
    299 
    300 const char *ArgList::GetOrMakeJoinedArgString(unsigned Index,
    301                                               StringRef LHS,
    302                                               StringRef RHS) const {
    303   StringRef Cur = getArgString(Index);
    304   if (Cur.size() == LHS.size() + RHS.size() &&
    305       Cur.startswith(LHS) && Cur.endswith(RHS))
    306     return Cur.data();
    307 
    308   return MakeArgString(LHS + RHS);
    309 }
    310 
    311 //
    312 
    313 InputArgList::InputArgList(const char* const *ArgBegin,
    314                            const char* const *ArgEnd)
    315   : NumInputArgStrings(ArgEnd - ArgBegin) {
    316   ArgStrings.append(ArgBegin, ArgEnd);
    317 }
    318 
    319 InputArgList::~InputArgList() {
    320   // An InputArgList always owns its arguments.
    321   for (iterator it = begin(), ie = end(); it != ie; ++it)
    322     delete *it;
    323 }
    324 
    325 unsigned InputArgList::MakeIndex(StringRef String0) const {
    326   unsigned Index = ArgStrings.size();
    327 
    328   // Tuck away so we have a reliable const char *.
    329   SynthesizedStrings.push_back(String0);
    330   ArgStrings.push_back(SynthesizedStrings.back().c_str());
    331 
    332   return Index;
    333 }
    334 
    335 unsigned InputArgList::MakeIndex(StringRef String0,
    336                                  StringRef String1) const {
    337   unsigned Index0 = MakeIndex(String0);
    338   unsigned Index1 = MakeIndex(String1);
    339   assert(Index0 + 1 == Index1 && "Unexpected non-consecutive indices!");
    340   (void) Index1;
    341   return Index0;
    342 }
    343 
    344 const char *InputArgList::MakeArgString(StringRef Str) const {
    345   return getArgString(MakeIndex(Str));
    346 }
    347 
    348 //
    349 
    350 DerivedArgList::DerivedArgList(const InputArgList &_BaseArgs)
    351   : BaseArgs(_BaseArgs) {
    352 }
    353 
    354 DerivedArgList::~DerivedArgList() {
    355   // We only own the arguments we explicitly synthesized.
    356   for (iterator it = SynthesizedArgs.begin(), ie = SynthesizedArgs.end();
    357        it != ie; ++it)
    358     delete *it;
    359 }
    360 
    361 const char *DerivedArgList::MakeArgString(StringRef Str) const {
    362   return BaseArgs.MakeArgString(Str);
    363 }
    364 
    365 Arg *DerivedArgList::MakeFlagArg(const Arg *BaseArg, const Option *Opt) const {
    366   Arg *A = new Arg(Opt, 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, Index, BaseArgs.getArgString(Index), BaseArg);
    375   SynthesizedArgs.push_back(A);
    376   return A;
    377 }
    378 
    379 Arg *DerivedArgList::MakeSeparateArg(const Arg *BaseArg, const Option *Opt,
    380                                      StringRef Value) const {
    381   unsigned Index = BaseArgs.MakeIndex(Opt->getName(), Value);
    382   Arg *A = new Arg(Opt, Index, BaseArgs.getArgString(Index + 1), BaseArg);
    383   SynthesizedArgs.push_back(A);
    384   return A;
    385 }
    386 
    387 Arg *DerivedArgList::MakeJoinedArg(const Arg *BaseArg, const Option *Opt,
    388                                    StringRef Value) const {
    389   unsigned Index = BaseArgs.MakeIndex(Opt->getName().str() + Value.str());
    390   Arg *A = new Arg(Opt, Index,
    391                    BaseArgs.getArgString(Index) + Opt->getName().size(),
    392                    BaseArg);
    393   SynthesizedArgs.push_back(A);
    394   return A;
    395 }
    396