2011-01-01 01:31:54 +08:00
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//===--- OptTable.cpp - Option Table Implementation -----------------------===//
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2009-03-04 16:33:23 +08:00
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is distributed under the University of Illinois Open Source
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// License. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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2009-11-19 08:15:11 +08:00
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#include "clang/Driver/OptTable.h"
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2009-03-05 06:41:37 +08:00
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#include "clang/Driver/Arg.h"
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#include "clang/Driver/ArgList.h"
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2009-03-04 16:33:23 +08:00
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#include "clang/Driver/Option.h"
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2009-12-03 15:01:38 +08:00
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#include "llvm/Support/raw_ostream.h"
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2009-03-24 05:50:40 +08:00
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#include <algorithm>
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2009-12-05 05:08:40 +08:00
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#include <map>
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2009-03-04 16:33:23 +08:00
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using namespace clang::driver;
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using namespace clang::driver::options;
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2011-07-23 18:55:15 +08:00
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using namespace clang;
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2009-03-04 16:33:23 +08:00
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2009-03-24 02:41:45 +08:00
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// Ordering on Info. The ordering is *almost* lexicographic, with two
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// exceptions. First, '\0' comes at the end of the alphabet instead of
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2011-04-15 13:22:18 +08:00
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// the beginning (thus options precede any other options which prefix
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2009-03-24 02:41:45 +08:00
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// them). Second, for options with the same name, the less permissive
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2011-04-15 13:22:18 +08:00
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// version should come first; a Flag option should precede a Joined
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2009-03-24 02:41:45 +08:00
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// option, for example.
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static int StrCmpOptionName(const char *A, const char *B) {
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char a = *A, b = *B;
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while (a == b) {
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if (a == '\0')
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return 0;
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a = *++A;
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b = *++B;
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}
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if (a == '\0') // A is a prefix of B.
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return 1;
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if (b == '\0') // B is a prefix of A.
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return -1;
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// Otherwise lexicographic.
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return (a < b) ? -1 : 1;
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}
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2009-11-19 05:42:57 +08:00
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namespace clang {
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namespace driver {
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2009-11-19 04:19:36 +08:00
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static inline bool operator<(const OptTable::Info &A, const OptTable::Info &B) {
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2009-03-24 02:41:45 +08:00
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if (&A == &B)
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return false;
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if (int N = StrCmpOptionName(A.Name, B.Name))
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return N == -1;
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// Names are the same, check that classes are in order; exactly one
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// should be joined, and it should succeed the other.
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2009-03-25 11:06:26 +08:00
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assert(((A.Kind == Option::JoinedClass) ^ (B.Kind == Option::JoinedClass)) &&
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2009-03-24 02:41:45 +08:00
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"Unexpected classes for options with same name.");
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return B.Kind == Option::JoinedClass;
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}
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2009-11-19 05:42:57 +08:00
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// Support lower_bound between info and an option name.
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static inline bool operator<(const OptTable::Info &I, const char *Name) {
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return StrCmpOptionName(I.Name, Name) == -1;
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}
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static inline bool operator<(const char *Name, const OptTable::Info &I) {
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return StrCmpOptionName(Name, I.Name) == -1;
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}
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}
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}
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2009-03-24 02:41:45 +08:00
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//
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2009-11-19 12:14:53 +08:00
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OptSpecifier::OptSpecifier(const Option *Opt) : ID(Opt->getID()) {}
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//
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2009-11-19 04:19:36 +08:00
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OptTable::OptTable(const Info *_OptionInfos, unsigned _NumOptionInfos)
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: OptionInfos(_OptionInfos), NumOptionInfos(_NumOptionInfos),
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Options(new Option*[NumOptionInfos]),
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TheInputOption(0), TheUnknownOption(0), FirstSearchableIndex(0)
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{
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2009-07-14 05:50:47 +08:00
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// Explicitly zero initialize the error to work around a bug in array
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// value-initialization on MinGW with gcc 4.3.5.
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2009-11-19 04:19:36 +08:00
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memset(Options, 0, sizeof(*Options) * NumOptionInfos);
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2009-07-14 05:50:47 +08:00
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2009-03-24 02:41:45 +08:00
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// Find start of normal options.
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2009-11-19 04:19:36 +08:00
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for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
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unsigned Kind = getInfo(i + 1).Kind;
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if (Kind == Option::InputClass) {
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assert(!TheInputOption && "Cannot have multiple input options!");
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TheInputOption = getOption(i + 1);
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} else if (Kind == Option::UnknownClass) {
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assert(!TheUnknownOption && "Cannot have multiple input options!");
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TheUnknownOption = getOption(i + 1);
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} else if (Kind != Option::GroupClass) {
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FirstSearchableIndex = i;
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2009-03-24 02:41:45 +08:00
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break;
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}
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}
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2009-11-19 04:19:36 +08:00
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assert(FirstSearchableIndex != 0 && "No searchable options?");
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2009-03-24 02:41:45 +08:00
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#ifndef NDEBUG
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// Check that everything after the first searchable option is a
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// regular option class.
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2009-11-19 04:19:36 +08:00
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for (unsigned i = FirstSearchableIndex, e = getNumOptions(); i != e; ++i) {
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Option::OptionClass Kind = (Option::OptionClass) getInfo(i + 1).Kind;
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2009-03-24 02:41:45 +08:00
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assert((Kind != Option::InputClass && Kind != Option::UnknownClass &&
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Kind != Option::GroupClass) &&
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"Special options should be defined first!");
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}
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// Check that options are in order.
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2009-11-19 04:19:36 +08:00
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for (unsigned i = FirstSearchableIndex+1, e = getNumOptions(); i != e; ++i) {
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if (!(getInfo(i) < getInfo(i + 1))) {
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getOption(i)->dump();
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getOption(i + 1)->dump();
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2009-03-24 02:41:45 +08:00
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assert(0 && "Options are not in order!");
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}
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}
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2009-09-09 23:08:12 +08:00
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#endif
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2009-03-04 16:33:23 +08:00
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}
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2009-09-09 23:08:12 +08:00
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OptTable::~OptTable() {
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2009-11-19 04:19:36 +08:00
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for (unsigned i = 0, e = getNumOptions(); i != e; ++i)
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2009-03-04 16:33:23 +08:00
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delete Options[i];
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delete[] Options;
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}
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2009-11-19 04:19:36 +08:00
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Option *OptTable::CreateOption(unsigned id) const {
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const Info &info = getInfo(id);
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2009-09-09 23:08:12 +08:00
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const OptionGroup *Group =
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2009-11-19 04:19:36 +08:00
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cast_or_null<OptionGroup>(getOption(info.GroupID));
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const Option *Alias = getOption(info.AliasID);
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2009-03-04 16:33:23 +08:00
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Option *Opt = 0;
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switch (info.Kind) {
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2009-03-05 05:53:04 +08:00
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case Option::InputClass:
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2009-11-19 12:25:06 +08:00
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Opt = new InputOption(id); break;
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2009-03-05 05:53:04 +08:00
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case Option::UnknownClass:
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2009-11-19 12:25:06 +08:00
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Opt = new UnknownOption(id); break;
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2009-03-04 16:33:23 +08:00
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case Option::GroupClass:
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2009-03-05 05:53:04 +08:00
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Opt = new OptionGroup(id, info.Name, Group); break;
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2009-03-04 16:33:23 +08:00
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case Option::FlagClass:
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2009-03-05 05:53:04 +08:00
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Opt = new FlagOption(id, info.Name, Group, Alias); break;
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2009-03-04 16:33:23 +08:00
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case Option::JoinedClass:
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2009-03-05 05:53:04 +08:00
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Opt = new JoinedOption(id, info.Name, Group, Alias); break;
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2009-03-04 16:33:23 +08:00
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case Option::SeparateClass:
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2009-03-05 05:53:04 +08:00
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Opt = new SeparateOption(id, info.Name, Group, Alias); break;
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2009-03-04 16:33:23 +08:00
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case Option::CommaJoinedClass:
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2009-03-05 05:53:04 +08:00
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Opt = new CommaJoinedOption(id, info.Name, Group, Alias); break;
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2009-03-04 16:33:23 +08:00
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case Option::MultiArgClass:
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2009-03-05 05:53:04 +08:00
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Opt = new MultiArgOption(id, info.Name, Group, Alias, info.Param); break;
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2009-03-04 16:33:23 +08:00
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case Option::JoinedOrSeparateClass:
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2009-03-05 05:53:04 +08:00
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Opt = new JoinedOrSeparateOption(id, info.Name, Group, Alias); break;
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2009-03-04 16:33:23 +08:00
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case Option::JoinedAndSeparateClass:
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2009-03-05 05:53:04 +08:00
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Opt = new JoinedAndSeparateOption(id, info.Name, Group, Alias); break;
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2009-03-04 16:33:23 +08:00
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}
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2009-11-19 01:42:34 +08:00
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if (info.Flags & DriverOption)
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Opt->setDriverOption(true);
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if (info.Flags & LinkerInput)
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Opt->setLinkerInput(true);
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if (info.Flags & NoArgumentUnused)
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Opt->setNoArgumentUnused(true);
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2010-08-13 12:44:20 +08:00
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if (info.Flags & NoForward)
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Opt->setNoForward(true);
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2009-11-19 01:42:34 +08:00
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if (info.Flags & RenderAsInput)
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Opt->setNoOptAsInput(true);
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if (info.Flags & RenderJoined) {
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2010-03-20 09:12:00 +08:00
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assert((info.Kind == Option::JoinedOrSeparateClass ||
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info.Kind == Option::SeparateClass) && "Invalid option.");
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2010-06-10 06:31:04 +08:00
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Opt->setRenderStyle(Option::RenderJoinedStyle);
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2009-11-19 01:42:34 +08:00
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}
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if (info.Flags & RenderSeparate) {
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2010-03-20 09:12:00 +08:00
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assert((info.Kind == Option::JoinedOrSeparateClass ||
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info.Kind == Option::JoinedClass) && "Invalid option.");
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2010-06-10 06:31:04 +08:00
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Opt->setRenderStyle(Option::RenderSeparateStyle);
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2009-03-04 16:33:23 +08:00
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}
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2009-11-19 01:42:34 +08:00
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if (info.Flags & Unsupported)
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Opt->setUnsupported(true);
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2009-03-04 16:33:23 +08:00
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return Opt;
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}
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2009-03-05 06:41:37 +08:00
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2010-06-12 06:00:17 +08:00
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Arg *OptTable::ParseOneArg(const ArgList &Args, unsigned &Index) const {
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2009-03-23 07:26:43 +08:00
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unsigned Prev = Index;
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2009-03-05 06:41:37 +08:00
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const char *Str = Args.getArgString(Index);
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2009-03-12 16:44:47 +08:00
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// Anything that doesn't start with '-' is an input, as is '-' itself.
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if (Str[0] != '-' || Str[1] == '\0')
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2010-06-10 06:31:08 +08:00
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return new Arg(TheInputOption, Index++, Str);
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2009-03-05 06:41:37 +08:00
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2009-11-19 04:19:36 +08:00
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const Info *Start = OptionInfos + FirstSearchableIndex;
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2009-11-19 12:25:06 +08:00
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const Info *End = OptionInfos + getNumOptions();
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2009-03-24 05:50:40 +08:00
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2009-04-08 02:21:47 +08:00
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// Search for the first next option which could be a prefix.
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2009-03-24 05:50:40 +08:00
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Start = std::lower_bound(Start, End, Str);
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2009-04-08 02:21:47 +08:00
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// Options are stored in sorted order, with '\0' at the end of the
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// alphabet. Since the only options which can accept a string must
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// prefix it, we iteratively search for the next option which could
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// be a prefix.
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//
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// FIXME: This is searching much more than necessary, but I am
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// blanking on the simplest way to make it fast. We can solve this
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// problem when we move to TableGen.
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2009-03-24 05:50:40 +08:00
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for (; Start != End; ++Start) {
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2009-04-08 02:21:47 +08:00
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// Scan for first option which is a proper prefix.
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for (; Start != End; ++Start)
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if (memcmp(Str, Start->Name, strlen(Start->Name)) == 0)
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break;
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if (Start == End)
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2009-03-24 05:50:40 +08:00
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break;
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2009-04-08 02:21:47 +08:00
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// See if this option matches.
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2009-11-19 12:25:06 +08:00
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if (Arg *A = getOption(Start - OptionInfos + 1)->accept(Args, Index))
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2009-03-24 05:50:40 +08:00
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return A;
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// Otherwise, see if this argument was missing values.
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if (Prev != Index)
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return 0;
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2009-03-05 06:41:37 +08:00
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}
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2010-06-10 06:31:08 +08:00
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return new Arg(TheUnknownOption, Index++, Str);
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2009-11-19 04:19:36 +08:00
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}
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2009-11-19 14:35:06 +08:00
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2010-10-11 17:18:43 +08:00
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InputArgList *OptTable::ParseArgs(const char* const *ArgBegin,
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const char* const *ArgEnd,
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2009-11-19 14:35:06 +08:00
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unsigned &MissingArgIndex,
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unsigned &MissingArgCount) const {
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InputArgList *Args = new InputArgList(ArgBegin, ArgEnd);
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// FIXME: Handle '@' args (or at least error on them).
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MissingArgIndex = MissingArgCount = 0;
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unsigned Index = 0, End = ArgEnd - ArgBegin;
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while (Index < End) {
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// Ignore empty arguments (other things may still take them as arguments).
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if (Args->getArgString(Index)[0] == '\0') {
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++Index;
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continue;
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}
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unsigned Prev = Index;
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Arg *A = ParseOneArg(*Args, Index);
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assert(Index > Prev && "Parser failed to consume argument.");
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// Check for missing argument error.
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if (!A) {
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assert(Index >= End && "Unexpected parser error.");
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assert(Index - Prev - 1 && "No missing arguments!");
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MissingArgIndex = Prev;
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MissingArgCount = Index - Prev - 1;
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break;
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}
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Args->append(A);
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}
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return Args;
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}
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2009-12-03 15:01:38 +08:00
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static std::string getOptionHelpName(const OptTable &Opts, OptSpecifier Id) {
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std::string Name = Opts.getOptionName(Id);
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// Add metavar, if used.
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switch (Opts.getOptionKind(Id)) {
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case Option::GroupClass: case Option::InputClass: case Option::UnknownClass:
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assert(0 && "Invalid option with help text.");
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2010-06-17 00:59:23 +08:00
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case Option::MultiArgClass:
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2009-12-03 15:01:38 +08:00
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assert(0 && "Cannot print metavar for this kind of option.");
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case Option::FlagClass:
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break;
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case Option::SeparateClass: case Option::JoinedOrSeparateClass:
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Name += ' ';
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// FALLTHROUGH
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case Option::JoinedClass: case Option::CommaJoinedClass:
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2010-06-17 00:59:23 +08:00
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case Option::JoinedAndSeparateClass:
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2009-12-03 15:01:38 +08:00
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if (const char *MetaVarName = Opts.getOptionMetaVar(Id))
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Name += MetaVarName;
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else
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Name += "<value>";
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break;
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}
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return Name;
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}
|
|
|
|
|
2011-07-23 18:55:15 +08:00
|
|
|
static void PrintHelpOptionList(raw_ostream &OS, StringRef Title,
|
2009-12-05 05:08:40 +08:00
|
|
|
std::vector<std::pair<std::string,
|
|
|
|
const char*> > &OptionHelp) {
|
|
|
|
OS << Title << ":\n";
|
2009-12-03 15:01:38 +08:00
|
|
|
|
|
|
|
// Find the maximum option length.
|
|
|
|
unsigned OptionFieldWidth = 0;
|
|
|
|
for (unsigned i = 0, e = OptionHelp.size(); i != e; ++i) {
|
|
|
|
// Skip titles.
|
|
|
|
if (!OptionHelp[i].second)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
// Limit the amount of padding we are willing to give up for alignment.
|
|
|
|
unsigned Length = OptionHelp[i].first.size();
|
|
|
|
if (Length <= 23)
|
|
|
|
OptionFieldWidth = std::max(OptionFieldWidth, Length);
|
|
|
|
}
|
|
|
|
|
|
|
|
const unsigned InitialPad = 2;
|
|
|
|
for (unsigned i = 0, e = OptionHelp.size(); i != e; ++i) {
|
|
|
|
const std::string &Option = OptionHelp[i].first;
|
|
|
|
int Pad = OptionFieldWidth - int(Option.size());
|
|
|
|
OS.indent(InitialPad) << Option;
|
|
|
|
|
|
|
|
// Break on long option names.
|
|
|
|
if (Pad < 0) {
|
|
|
|
OS << "\n";
|
|
|
|
Pad = OptionFieldWidth + InitialPad;
|
|
|
|
}
|
|
|
|
OS.indent(Pad + 1) << OptionHelp[i].second << '\n';
|
|
|
|
}
|
2009-12-05 05:08:40 +08:00
|
|
|
}
|
|
|
|
|
|
|
|
static const char *getOptionHelpGroup(const OptTable &Opts, OptSpecifier Id) {
|
|
|
|
unsigned GroupID = Opts.getOptionGroupID(Id);
|
|
|
|
|
|
|
|
// If not in a group, return the default help group.
|
|
|
|
if (!GroupID)
|
|
|
|
return "OPTIONS";
|
|
|
|
|
|
|
|
// Abuse the help text of the option groups to store the "help group"
|
|
|
|
// name.
|
|
|
|
//
|
|
|
|
// FIXME: Split out option groups.
|
|
|
|
if (const char *GroupHelp = Opts.getOptionHelpText(GroupID))
|
|
|
|
return GroupHelp;
|
|
|
|
|
|
|
|
// Otherwise keep looking.
|
|
|
|
return getOptionHelpGroup(Opts, GroupID);
|
|
|
|
}
|
|
|
|
|
2011-07-23 18:55:15 +08:00
|
|
|
void OptTable::PrintHelp(raw_ostream &OS, const char *Name,
|
2009-12-05 05:08:40 +08:00
|
|
|
const char *Title, bool ShowHidden) const {
|
|
|
|
OS << "OVERVIEW: " << Title << "\n";
|
|
|
|
OS << '\n';
|
|
|
|
OS << "USAGE: " << Name << " [options] <inputs>\n";
|
|
|
|
OS << '\n';
|
|
|
|
|
|
|
|
// Render help text into a map of group-name to a list of (option, help)
|
|
|
|
// pairs.
|
|
|
|
typedef std::map<std::string,
|
|
|
|
std::vector<std::pair<std::string, const char*> > > helpmap_ty;
|
|
|
|
helpmap_ty GroupedOptionHelp;
|
|
|
|
|
|
|
|
for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
|
|
|
|
unsigned Id = i + 1;
|
|
|
|
|
|
|
|
// FIXME: Split out option groups.
|
|
|
|
if (getOptionKind(Id) == Option::GroupClass)
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (!ShowHidden && isOptionHelpHidden(Id))
|
|
|
|
continue;
|
|
|
|
|
|
|
|
if (const char *Text = getOptionHelpText(Id)) {
|
|
|
|
const char *HelpGroup = getOptionHelpGroup(*this, Id);
|
|
|
|
const std::string &OptName = getOptionHelpName(*this, Id);
|
|
|
|
GroupedOptionHelp[HelpGroup].push_back(std::make_pair(OptName, Text));
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
for (helpmap_ty::iterator it = GroupedOptionHelp .begin(),
|
|
|
|
ie = GroupedOptionHelp.end(); it != ie; ++it) {
|
|
|
|
if (it != GroupedOptionHelp .begin())
|
|
|
|
OS << "\n";
|
|
|
|
PrintHelpOptionList(OS, it->first, it->second);
|
|
|
|
}
|
2009-12-03 15:01:38 +08:00
|
|
|
|
|
|
|
OS.flush();
|
|
|
|
}
|