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"
15 #include "llvm/Support/ErrorHandling.h"
18 using namespace clang::driver;
20 Option::Option(OptionClass _Kind, OptSpecifier _ID, const char *_Name,
21 const OptionGroup *_Group, const Option *_Alias)
22 : Kind(_Kind), ID(_ID.getID()), Name(_Name), Group(_Group), Alias(_Alias),
23 Unsupported(false), LinkerInput(false), NoOptAsInput(false),
24 DriverOption(false), NoArgumentUnused(false), NoForward(false) {
26 // Multi-level aliases are not supported, and alias options cannot
27 // have groups. This just simplifies option tracking, it is not an
28 // inherent limitation.
29 assert((!Alias || (!Alias->Alias && !Group)) &&
30 "Multi-level aliases and aliases with groups are unsupported.");
32 // Initialize rendering options based on the class.
37 RenderStyle = RenderValuesStyle;
41 case JoinedAndSeparateClass:
42 RenderStyle = RenderJoinedStyle;
45 case CommaJoinedClass:
46 RenderStyle = RenderCommaJoinedStyle;
52 case JoinedOrSeparateClass:
53 RenderStyle = RenderSeparateStyle;
61 void Option::dump() const {
64 #define P(N) case N: llvm::errs() << #N; break
73 P(JoinedOrSeparateClass);
74 P(JoinedAndSeparateClass);
78 llvm::errs() << " Name:\"" << Name << '"';
81 llvm::errs() << " Group:";
86 llvm::errs() << " Alias:";
90 if (const MultiArgOption *MOA = dyn_cast<MultiArgOption>(this))
91 llvm::errs() << " NumArgs:" << MOA->getNumArgs();
93 llvm::errs() << ">\n";
96 bool Option::matches(OptSpecifier Opt) const {
97 // Aliases are never considered in matching, look through them.
99 return Alias->matches(Opt);
101 // Check exact match.
106 return Group->matches(Opt);
110 OptionGroup::OptionGroup(OptSpecifier ID, const char *Name,
111 const OptionGroup *Group)
112 : Option(Option::GroupClass, ID, Name, Group, 0) {
115 Arg *OptionGroup::accept(const ArgList &Args, unsigned &Index) const {
116 llvm_unreachable("accept() should never be called on an OptionGroup");
119 InputOption::InputOption(OptSpecifier ID)
120 : Option(Option::InputClass, ID, "<input>", 0, 0) {
123 Arg *InputOption::accept(const ArgList &Args, unsigned &Index) const {
124 llvm_unreachable("accept() should never be called on an InputOption");
127 UnknownOption::UnknownOption(OptSpecifier ID)
128 : Option(Option::UnknownClass, ID, "<unknown>", 0, 0) {
131 Arg *UnknownOption::accept(const ArgList &Args, unsigned &Index) const {
132 llvm_unreachable("accept() should never be called on an UnknownOption");
135 FlagOption::FlagOption(OptSpecifier ID, const char *Name,
136 const OptionGroup *Group, const Option *Alias)
137 : Option(Option::FlagClass, ID, Name, Group, Alias) {
140 Arg *FlagOption::accept(const ArgList &Args, unsigned &Index) const {
141 // Matches iff this is an exact match.
142 // FIXME: Avoid strlen.
143 if (getName().size() != strlen(Args.getArgString(Index)))
146 return new Arg(getUnaliasedOption(), Index++);
149 JoinedOption::JoinedOption(OptSpecifier ID, const char *Name,
150 const OptionGroup *Group, const Option *Alias)
151 : Option(Option::JoinedClass, ID, Name, Group, Alias) {
154 Arg *JoinedOption::accept(const ArgList &Args, unsigned &Index) const {
156 const char *Value = Args.getArgString(Index) + getName().size();
157 return new Arg(getUnaliasedOption(), Index++, Value);
160 CommaJoinedOption::CommaJoinedOption(OptSpecifier ID, const char *Name,
161 const OptionGroup *Group,
163 : Option(Option::CommaJoinedClass, ID, Name, Group, Alias) {
166 Arg *CommaJoinedOption::accept(const ArgList &Args,
167 unsigned &Index) const {
169 const char *Str = Args.getArgString(Index) + getName().size();
170 Arg *A = new Arg(getUnaliasedOption(), Index++);
172 // Parse out the comma separated values.
173 const char *Prev = Str;
177 if (!c || c == ',') {
179 char *Value = new char[Str - Prev + 1];
180 memcpy(Value, Prev, Str - Prev);
181 Value[Str - Prev] = '\0';
182 A->getValues().push_back(Value);
191 A->setOwnsValues(true);
196 SeparateOption::SeparateOption(OptSpecifier ID, const char *Name,
197 const OptionGroup *Group, const Option *Alias)
198 : Option(Option::SeparateClass, ID, Name, Group, Alias) {
201 Arg *SeparateOption::accept(const ArgList &Args, unsigned &Index) const {
202 // Matches iff this is an exact match.
203 // FIXME: Avoid strlen.
204 if (getName().size() != strlen(Args.getArgString(Index)))
208 if (Index > Args.getNumInputArgStrings())
211 return new Arg(getUnaliasedOption(), Index - 2, Args.getArgString(Index - 1));
214 MultiArgOption::MultiArgOption(OptSpecifier ID, const char *Name,
215 const OptionGroup *Group, const Option *Alias,
217 : Option(Option::MultiArgClass, ID, Name, Group, Alias), NumArgs(_NumArgs) {
218 assert(NumArgs > 1 && "Invalid MultiArgOption!");
221 Arg *MultiArgOption::accept(const ArgList &Args, unsigned &Index) const {
222 // Matches iff this is an exact match.
223 // FIXME: Avoid strlen.
224 if (getName().size() != strlen(Args.getArgString(Index)))
227 Index += 1 + NumArgs;
228 if (Index > Args.getNumInputArgStrings())
231 Arg *A = new Arg(getUnaliasedOption(), Index - 1 - NumArgs,
232 Args.getArgString(Index - NumArgs));
233 for (unsigned i = 1; i != NumArgs; ++i)
234 A->getValues().push_back(Args.getArgString(Index - NumArgs + i));
238 JoinedOrSeparateOption::JoinedOrSeparateOption(OptSpecifier ID,
240 const OptionGroup *Group,
242 : Option(Option::JoinedOrSeparateClass, ID, Name, Group, Alias) {
245 Arg *JoinedOrSeparateOption::accept(const ArgList &Args,
246 unsigned &Index) const {
247 // If this is not an exact match, it is a joined arg.
248 // FIXME: Avoid strlen.
249 if (getName().size() != strlen(Args.getArgString(Index))) {
250 const char *Value = Args.getArgString(Index) + getName().size();
251 return new Arg(this, Index++, Value);
254 // Otherwise it must be separate.
256 if (Index > Args.getNumInputArgStrings())
259 return new Arg(getUnaliasedOption(), Index - 2, Args.getArgString(Index - 1));
262 JoinedAndSeparateOption::JoinedAndSeparateOption(OptSpecifier ID,
264 const OptionGroup *Group,
266 : Option(Option::JoinedAndSeparateClass, ID, Name, Group, Alias) {
269 Arg *JoinedAndSeparateOption::accept(const ArgList &Args,
270 unsigned &Index) const {
274 if (Index > Args.getNumInputArgStrings())
277 return new Arg(getUnaliasedOption(), Index - 2,
278 Args.getArgString(Index-2)+getName().size(),
279 Args.getArgString(Index-1));