1 //===--- Option.cpp - Abstract Driver Options -----------------------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "clang/Driver/Option.h"
12 #include "clang/Driver/Arg.h"
13 #include "clang/Driver/ArgList.h"
14 #include "llvm/Support/raw_ostream.h"
17 using namespace clang::driver;
19 Option::Option(OptionClass _Kind, OptSpecifier _ID, const char *_Name,
20 const OptionGroup *_Group, const Option *_Alias)
21 : Kind(_Kind), ID(_ID.getID()), Name(_Name), Group(_Group), Alias(_Alias),
22 Unsupported(false), LinkerInput(false), NoOptAsInput(false),
23 DriverOption(false), NoArgumentUnused(false), NoForward(false) {
25 // Multi-level aliases are not supported, and alias options cannot
26 // have groups. This just simplifies option tracking, it is not an
27 // inherent limitation.
28 assert((!Alias || (!Alias->Alias && !Group)) &&
29 "Multi-level aliases and aliases with groups are unsupported.");
31 // Initialize rendering options based on the class.
36 RenderStyle = RenderValuesStyle;
40 case JoinedAndSeparateClass:
41 RenderStyle = RenderJoinedStyle;
44 case CommaJoinedClass:
45 RenderStyle = RenderCommaJoinedStyle;
51 case JoinedOrSeparateClass:
52 RenderStyle = RenderSeparateStyle;
60 void Option::dump() const {
64 assert(0 && "Invalid kind");
65 #define P(N) case N: llvm::errs() << #N; break
74 P(JoinedOrSeparateClass);
75 P(JoinedAndSeparateClass);
79 llvm::errs() << " Name:\"" << Name << '"';
82 llvm::errs() << " Group:";
87 llvm::errs() << " Alias:";
91 if (const MultiArgOption *MOA = dyn_cast<MultiArgOption>(this))
92 llvm::errs() << " NumArgs:" << MOA->getNumArgs();
94 llvm::errs() << ">\n";
97 bool Option::matches(OptSpecifier Opt) const {
98 // Aliases are never considered in matching, look through them.
100 return Alias->matches(Opt);
102 // Check exact match.
107 return Group->matches(Opt);
111 OptionGroup::OptionGroup(OptSpecifier ID, const char *Name,
112 const OptionGroup *Group)
113 : Option(Option::GroupClass, ID, Name, Group, 0) {
116 Arg *OptionGroup::accept(const ArgList &Args, unsigned &Index) const {
117 assert(0 && "accept() should never be called on an OptionGroup");
121 InputOption::InputOption(OptSpecifier ID)
122 : Option(Option::InputClass, ID, "<input>", 0, 0) {
125 Arg *InputOption::accept(const ArgList &Args, unsigned &Index) const {
126 assert(0 && "accept() should never be called on an InputOption");
130 UnknownOption::UnknownOption(OptSpecifier ID)
131 : Option(Option::UnknownClass, ID, "<unknown>", 0, 0) {
134 Arg *UnknownOption::accept(const ArgList &Args, unsigned &Index) const {
135 assert(0 && "accept() should never be called on an UnknownOption");
139 FlagOption::FlagOption(OptSpecifier ID, const char *Name,
140 const OptionGroup *Group, const Option *Alias)
141 : Option(Option::FlagClass, ID, Name, Group, Alias) {
144 Arg *FlagOption::accept(const ArgList &Args, unsigned &Index) const {
145 // Matches iff this is an exact match.
146 // FIXME: Avoid strlen.
147 if (getName().size() != strlen(Args.getArgString(Index)))
150 return new Arg(getUnaliasedOption(), Index++);
153 JoinedOption::JoinedOption(OptSpecifier ID, const char *Name,
154 const OptionGroup *Group, const Option *Alias)
155 : Option(Option::JoinedClass, ID, Name, Group, Alias) {
158 Arg *JoinedOption::accept(const ArgList &Args, unsigned &Index) const {
160 const char *Value = Args.getArgString(Index) + getName().size();
161 return new Arg(getUnaliasedOption(), Index++, Value);
164 CommaJoinedOption::CommaJoinedOption(OptSpecifier ID, const char *Name,
165 const OptionGroup *Group,
167 : Option(Option::CommaJoinedClass, ID, Name, Group, Alias) {
170 Arg *CommaJoinedOption::accept(const ArgList &Args,
171 unsigned &Index) const {
173 const char *Str = Args.getArgString(Index) + getName().size();
174 Arg *A = new Arg(getUnaliasedOption(), Index++);
176 // Parse out the comma separated values.
177 const char *Prev = Str;
181 if (!c || c == ',') {
183 char *Value = new char[Str - Prev + 1];
184 memcpy(Value, Prev, Str - Prev);
185 Value[Str - Prev] = '\0';
186 A->getValues().push_back(Value);
195 A->setOwnsValues(true);
200 SeparateOption::SeparateOption(OptSpecifier ID, const char *Name,
201 const OptionGroup *Group, const Option *Alias)
202 : Option(Option::SeparateClass, ID, Name, Group, Alias) {
205 Arg *SeparateOption::accept(const ArgList &Args, unsigned &Index) const {
206 // Matches iff this is an exact match.
207 // FIXME: Avoid strlen.
208 if (getName().size() != strlen(Args.getArgString(Index)))
212 if (Index > Args.getNumInputArgStrings())
215 return new Arg(getUnaliasedOption(), Index - 2, Args.getArgString(Index - 1));
218 MultiArgOption::MultiArgOption(OptSpecifier ID, const char *Name,
219 const OptionGroup *Group, const Option *Alias,
221 : Option(Option::MultiArgClass, ID, Name, Group, Alias), NumArgs(_NumArgs) {
222 assert(NumArgs > 1 && "Invalid MultiArgOption!");
225 Arg *MultiArgOption::accept(const ArgList &Args, unsigned &Index) const {
226 // Matches iff this is an exact match.
227 // FIXME: Avoid strlen.
228 if (getName().size() != strlen(Args.getArgString(Index)))
231 Index += 1 + NumArgs;
232 if (Index > Args.getNumInputArgStrings())
235 Arg *A = new Arg(getUnaliasedOption(), Index - 1 - NumArgs,
236 Args.getArgString(Index - NumArgs));
237 for (unsigned i = 1; i != NumArgs; ++i)
238 A->getValues().push_back(Args.getArgString(Index - NumArgs + i));
242 JoinedOrSeparateOption::JoinedOrSeparateOption(OptSpecifier ID,
244 const OptionGroup *Group,
246 : Option(Option::JoinedOrSeparateClass, ID, Name, Group, Alias) {
249 Arg *JoinedOrSeparateOption::accept(const ArgList &Args,
250 unsigned &Index) const {
251 // If this is not an exact match, it is a joined arg.
252 // FIXME: Avoid strlen.
253 if (getName().size() != strlen(Args.getArgString(Index))) {
254 const char *Value = Args.getArgString(Index) + getName().size();
255 return new Arg(this, Index++, Value);
258 // Otherwise it must be separate.
260 if (Index > Args.getNumInputArgStrings())
263 return new Arg(getUnaliasedOption(), Index - 2, Args.getArgString(Index - 1));
266 JoinedAndSeparateOption::JoinedAndSeparateOption(OptSpecifier ID,
268 const OptionGroup *Group,
270 : Option(Option::JoinedAndSeparateClass, ID, Name, Group, Alias) {
273 Arg *JoinedAndSeparateOption::accept(const ArgList &Args,
274 unsigned &Index) const {
278 if (Index > Args.getNumInputArgStrings())
281 return new Arg(getUnaliasedOption(), Index - 2,
282 Args.getArgString(Index-2)+getName().size(),
283 Args.getArgString(Index-1));