xref: /freebsd/contrib/llvm-project/llvm/lib/Option/ArgList.cpp (revision 9e5787d2284e187abb5b654d924394a65772e004) 
1 //===- ArgList.cpp - Argument List Management -----------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8 
9 #include "llvm/ADT/ArrayRef.h"
10 #include "llvm/ADT/None.h"
11 #include "llvm/ADT/SmallVector.h"
12 #include "llvm/ADT/STLExtras.h"
13 #include "llvm/ADT/StringRef.h"
14 #include "llvm/ADT/Twine.h"
15 #include "llvm/Config/llvm-config.h"
16 #include "llvm/Option/Arg.h"
17 #include "llvm/Option/ArgList.h"
18 #include "llvm/Option/Option.h"
19 #include "llvm/Option/OptSpecifier.h"
20 #include "llvm/Support/Compiler.h"
21 #include "llvm/Support/Debug.h"
22 #include "llvm/Support/raw_ostream.h"
23 #include <algorithm>
24 #include <cassert>
25 #include <memory>
26 #include <string>
27 #include <utility>
28 #include <vector>
29 
30 using namespace llvm;
31 using namespace llvm::opt;
32 
33 void ArgList::append(Arg *A) {
34   Args.push_back(A);
35 
36   // Update ranges for the option and all of its groups.
37   for (Option O = A->getOption().getUnaliasedOption(); O.isValid();
38        O = O.getGroup()) {
39     auto &R =
40         OptRanges.insert(std::make_pair(O.getID(), emptyRange())).first->second;
41     R.first = std::min<unsigned>(R.first, Args.size() - 1);
42     R.second = Args.size();
43   }
44 }
45 
46 void ArgList::eraseArg(OptSpecifier Id) {
47   // Zero out the removed entries but keep them around so that we don't
48   // need to invalidate OptRanges.
49   for (Arg *const &A : filtered(Id)) {
50     // Avoid the need for a non-const filtered iterator variant.
51     Arg **ArgsBegin = Args.data();
52     ArgsBegin[&A - ArgsBegin] = nullptr;
53   }
54   OptRanges.erase(Id.getID());
55 }
56 
57 ArgList::OptRange
58 ArgList::getRange(std::initializer_list<OptSpecifier> Ids) const {
59   OptRange R = emptyRange();
60   for (auto Id : Ids) {
61     auto I = OptRanges.find(Id.getID());
62     if (I != OptRanges.end()) {
63       R.first = std::min(R.first, I->second.first);
64       R.second = std::max(R.second, I->second.second);
65     }
66   }
67   // Map an empty {-1, 0} range to {0, 0} so it can be used to form iterators.
68   if (R.first == -1u)
69     R.first = 0;
70   return R;
71 }
72 
73 bool ArgList::hasFlag(OptSpecifier Pos, OptSpecifier Neg, bool Default) const {
74   if (Arg *A = getLastArg(Pos, Neg))
75     return A->getOption().matches(Pos);
76   return Default;
77 }
78 
79 bool ArgList::hasFlag(OptSpecifier Pos, OptSpecifier PosAlias, OptSpecifier Neg,
80                       bool Default) const {
81   if (Arg *A = getLastArg(Pos, PosAlias, Neg))
82     return A->getOption().matches(Pos) || A->getOption().matches(PosAlias);
83   return Default;
84 }
85 
86 StringRef ArgList::getLastArgValue(OptSpecifier Id, StringRef Default) const {
87   if (Arg *A = getLastArg(Id))
88     return A->getValue();
89   return Default;
90 }
91 
92 std::vector<std::string> ArgList::getAllArgValues(OptSpecifier Id) const {
93   SmallVector<const char *, 16> Values;
94   AddAllArgValues(Values, Id);
95   return std::vector<std::string>(Values.begin(), Values.end());
96 }
97 
98 void ArgList::AddAllArgsExcept(ArgStringList &Output,
99                                ArrayRef<OptSpecifier> Ids,
100                                ArrayRef<OptSpecifier> ExcludeIds) const {
101   for (const Arg *Arg : *this) {
102     bool Excluded = false;
103     for (OptSpecifier Id : ExcludeIds) {
104       if (Arg->getOption().matches(Id)) {
105         Excluded = true;
106         break;
107       }
108     }
109     if (!Excluded) {
110       for (OptSpecifier Id : Ids) {
111         if (Arg->getOption().matches(Id)) {
112           Arg->claim();
113           Arg->render(*this, Output);
114           break;
115         }
116       }
117     }
118   }
119 }
120 
121 /// This is a nicer interface when you don't have a list of Ids to exclude.
122 void ArgList::AddAllArgs(ArgStringList &Output,
123                          ArrayRef<OptSpecifier> Ids) const {
124   ArrayRef<OptSpecifier> Exclude = None;
125   AddAllArgsExcept(Output, Ids, Exclude);
126 }
127 
128 /// This 3-opt variant of AddAllArgs could be eliminated in favor of one
129 /// that accepts a single specifier, given the above which accepts any number.
130 void ArgList::AddAllArgs(ArgStringList &Output, OptSpecifier Id0,
131                          OptSpecifier Id1, OptSpecifier Id2) const {
132   for (auto Arg: filtered(Id0, Id1, Id2)) {
133     Arg->claim();
134     Arg->render(*this, Output);
135   }
136 }
137 
138 void ArgList::AddAllArgValues(ArgStringList &Output, OptSpecifier Id0,
139                               OptSpecifier Id1, OptSpecifier Id2) const {
140   for (auto Arg : filtered(Id0, Id1, Id2)) {
141     Arg->claim();
142     const auto &Values = Arg->getValues();
143     Output.append(Values.begin(), Values.end());
144   }
145 }
146 
147 void ArgList::AddAllArgsTranslated(ArgStringList &Output, OptSpecifier Id0,
148                                    const char *Translation,
149                                    bool Joined) const {
150   for (auto Arg: filtered(Id0)) {
151     Arg->claim();
152 
153     if (Joined) {
154       Output.push_back(MakeArgString(StringRef(Translation) +
155                                      Arg->getValue(0)));
156     } else {
157       Output.push_back(Translation);
158       Output.push_back(Arg->getValue(0));
159     }
160   }
161 }
162 
163 void ArgList::ClaimAllArgs(OptSpecifier Id0) const {
164   for (auto *Arg : filtered(Id0))
165     Arg->claim();
166 }
167 
168 void ArgList::ClaimAllArgs() const {
169   for (auto *Arg : *this)
170     if (!Arg->isClaimed())
171       Arg->claim();
172 }
173 
174 const char *ArgList::GetOrMakeJoinedArgString(unsigned Index,
175                                               StringRef LHS,
176                                               StringRef RHS) const {
177   StringRef Cur = getArgString(Index);
178   if (Cur.size() == LHS.size() + RHS.size() &&
179       Cur.startswith(LHS) && Cur.endswith(RHS))
180     return Cur.data();
181 
182   return MakeArgString(LHS + RHS);
183 }
184 
185 void ArgList::print(raw_ostream &O) const {
186   for (Arg *A : *this) {
187     O << "* ";
188     A->print(O);
189   }
190 }
191 
192 #if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
193 LLVM_DUMP_METHOD void ArgList::dump() const { print(dbgs()); }
194 #endif
195 
196 void InputArgList::releaseMemory() {
197   // An InputArgList always owns its arguments.
198   for (Arg *A : *this)
199     delete A;
200 }
201 
202 InputArgList::InputArgList(const char* const *ArgBegin,
203                            const char* const *ArgEnd)
204   : NumInputArgStrings(ArgEnd - ArgBegin) {
205   ArgStrings.append(ArgBegin, ArgEnd);
206 }
207 
208 unsigned InputArgList::MakeIndex(StringRef String0) const {
209   unsigned Index = ArgStrings.size();
210 
211   // Tuck away so we have a reliable const char *.
212   SynthesizedStrings.push_back(std::string(String0));
213   ArgStrings.push_back(SynthesizedStrings.back().c_str());
214 
215   return Index;
216 }
217 
218 unsigned InputArgList::MakeIndex(StringRef String0,
219                                  StringRef String1) const {
220   unsigned Index0 = MakeIndex(String0);
221   unsigned Index1 = MakeIndex(String1);
222   assert(Index0 + 1 == Index1 && "Unexpected non-consecutive indices!");
223   (void) Index1;
224   return Index0;
225 }
226 
227 const char *InputArgList::MakeArgStringRef(StringRef Str) const {
228   return getArgString(MakeIndex(Str));
229 }
230 
231 DerivedArgList::DerivedArgList(const InputArgList &BaseArgs)
232     : BaseArgs(BaseArgs) {}
233 
234 const char *DerivedArgList::MakeArgStringRef(StringRef Str) const {
235   return BaseArgs.MakeArgString(Str);
236 }
237 
238 void DerivedArgList::AddSynthesizedArg(Arg *A) {
239   SynthesizedArgs.push_back(std::unique_ptr<Arg>(A));
240 }
241 
242 Arg *DerivedArgList::MakeFlagArg(const Arg *BaseArg, const Option Opt) const {
243   SynthesizedArgs.push_back(
244       std::make_unique<Arg>(Opt, MakeArgString(Opt.getPrefix() + Opt.getName()),
245                        BaseArgs.MakeIndex(Opt.getName()), BaseArg));
246   return SynthesizedArgs.back().get();
247 }
248 
249 Arg *DerivedArgList::MakePositionalArg(const Arg *BaseArg, const Option Opt,
250                                        StringRef Value) const {
251   unsigned Index = BaseArgs.MakeIndex(Value);
252   SynthesizedArgs.push_back(
253       std::make_unique<Arg>(Opt, MakeArgString(Opt.getPrefix() + Opt.getName()),
254                        Index, BaseArgs.getArgString(Index), BaseArg));
255   return SynthesizedArgs.back().get();
256 }
257 
258 Arg *DerivedArgList::MakeSeparateArg(const Arg *BaseArg, const Option Opt,
259                                      StringRef Value) const {
260   unsigned Index = BaseArgs.MakeIndex(Opt.getName(), Value);
261   SynthesizedArgs.push_back(
262       std::make_unique<Arg>(Opt, MakeArgString(Opt.getPrefix() + Opt.getName()),
263                        Index, BaseArgs.getArgString(Index + 1), BaseArg));
264   return SynthesizedArgs.back().get();
265 }
266 
267 Arg *DerivedArgList::MakeJoinedArg(const Arg *BaseArg, const Option Opt,
268                                    StringRef Value) const {
269   unsigned Index = BaseArgs.MakeIndex((Opt.getName() + Value).str());
270   SynthesizedArgs.push_back(std::make_unique<Arg>(
271       Opt, MakeArgString(Opt.getPrefix() + Opt.getName()), Index,
272       BaseArgs.getArgString(Index) + Opt.getName().size(), BaseArg));
273   return SynthesizedArgs.back().get();
274 }
275