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Re-submitting r189416 with fix for Windows build on where strcasecmp is not defined. git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@189501 91177308-0d34-0410-b5e6-96231b3b80d8
180 lines
6.3 KiB
C++
180 lines
6.3 KiB
C++
//===--- OptTable.h - Option Table ------------------------------*- C++ -*-===//
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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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#ifndef LLVM_OPTION_OPTTABLE_H
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#define LLVM_OPTION_OPTTABLE_H
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#include "llvm/ADT/StringSet.h"
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#include "llvm/Option/OptSpecifier.h"
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namespace llvm {
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class raw_ostream;
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namespace opt {
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class Arg;
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class ArgList;
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class InputArgList;
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class Option;
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/// \brief Provide access to the Option info table.
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///
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/// The OptTable class provides a layer of indirection which allows Option
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/// instance to be created lazily. In the common case, only a few options will
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/// be needed at runtime; the OptTable class maintains enough information to
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/// parse command lines without instantiating Options, while letting other
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/// parts of the driver still use Option instances where convenient.
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class OptTable {
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public:
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/// \brief Entry for a single option instance in the option data table.
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struct Info {
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/// A null terminated array of prefix strings to apply to name while
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/// matching.
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const char *const *Prefixes;
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const char *Name;
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const char *HelpText;
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const char *MetaVar;
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unsigned ID;
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unsigned char Kind;
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unsigned char Param;
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unsigned short Flags;
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unsigned short GroupID;
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unsigned short AliasID;
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const char *AliasArgs;
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};
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private:
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/// \brief The static option information table.
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const Info *OptionInfos;
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unsigned NumOptionInfos;
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bool IgnoreCase;
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unsigned TheInputOptionID;
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unsigned TheUnknownOptionID;
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/// The index of the first option which can be parsed (i.e., is not a
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/// special option like 'input' or 'unknown', and is not an option group).
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unsigned FirstSearchableIndex;
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/// The union of all option prefixes. If an argument does not begin with
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/// one of these, it is an input.
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StringSet<> PrefixesUnion;
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std::string PrefixChars;
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private:
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const Info &getInfo(OptSpecifier Opt) const {
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unsigned id = Opt.getID();
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assert(id > 0 && id - 1 < getNumOptions() && "Invalid Option ID.");
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return OptionInfos[id - 1];
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}
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protected:
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OptTable(const Info *_OptionInfos, unsigned _NumOptionInfos,
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bool _IgnoreCase = false);
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public:
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~OptTable();
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/// \brief Return the total number of option classes.
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unsigned getNumOptions() const { return NumOptionInfos; }
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/// \brief Get the given Opt's Option instance, lazily creating it
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/// if necessary.
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///
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/// \return The option, or null for the INVALID option id.
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const Option getOption(OptSpecifier Opt) const;
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/// \brief Lookup the name of the given option.
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const char *getOptionName(OptSpecifier id) const {
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return getInfo(id).Name;
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}
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/// \brief Get the kind of the given option.
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unsigned getOptionKind(OptSpecifier id) const {
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return getInfo(id).Kind;
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}
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/// \brief Get the group id for the given option.
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unsigned getOptionGroupID(OptSpecifier id) const {
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return getInfo(id).GroupID;
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}
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/// \brief Get the help text to use to describe this option.
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const char *getOptionHelpText(OptSpecifier id) const {
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return getInfo(id).HelpText;
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}
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/// \brief Get the meta-variable name to use when describing
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/// this options values in the help text.
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const char *getOptionMetaVar(OptSpecifier id) const {
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return getInfo(id).MetaVar;
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}
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/// \brief Parse a single argument; returning the new argument and
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/// updating Index.
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///
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/// \param [in,out] Index - The current parsing position in the argument
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/// string list; on return this will be the index of the next argument
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/// string to parse.
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/// \param [in] FlagsToInclude - Only parse options with any of these flags.
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/// Zero is the default which includes all flags.
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/// \param [in] FlagsToExclude - Don't parse options with this flag. Zero
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/// is the default and means exclude nothing.
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///
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/// \return The parsed argument, or 0 if the argument is missing values
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/// (in which case Index still points at the conceptual next argument string
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/// to parse).
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Arg *ParseOneArg(const ArgList &Args, unsigned &Index,
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unsigned FlagsToInclude = 0,
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unsigned FlagsToExclude = 0) const;
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/// \brief Parse an list of arguments into an InputArgList.
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///
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/// The resulting InputArgList will reference the strings in [\p ArgBegin,
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/// \p ArgEnd), and their lifetime should extend past that of the returned
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/// InputArgList.
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///
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/// The only error that can occur in this routine is if an argument is
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/// missing values; in this case \p MissingArgCount will be non-zero.
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///
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/// \param ArgBegin - The beginning of the argument vector.
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/// \param ArgEnd - The end of the argument vector.
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/// \param MissingArgIndex - On error, the index of the option which could
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/// not be parsed.
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/// \param MissingArgCount - On error, the number of missing options.
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/// \param FlagsToInclude - Only parse options with any of these flags.
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/// Zero is the default which includes all flags.
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/// \param FlagsToExclude - Don't parse options with this flag. Zero
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/// is the default and means exclude nothing.
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/// \return An InputArgList; on error this will contain all the options
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/// which could be parsed.
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InputArgList *ParseArgs(const char* const *ArgBegin,
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const char* const *ArgEnd,
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unsigned &MissingArgIndex,
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unsigned &MissingArgCount,
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unsigned FlagsToInclude = 0,
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unsigned FlagsToExclude = 0) const;
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/// \brief Render the help text for an option table.
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///
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/// \param OS - The stream to write the help text to.
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/// \param Name - The name to use in the usage line.
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/// \param Title - The title to use in the usage line.
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/// \param FlagsToInclude - If non-zero, only include options with any
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/// of these flags set.
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/// \param FlagsToExclude - Exclude options with any of these flags set.
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void PrintHelp(raw_ostream &OS, const char *Name,
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const char *Title, unsigned FlagsToInclude,
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unsigned FlagsToExclude) const;
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void PrintHelp(raw_ostream &OS, const char *Name,
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const char *Title, bool ShowHidden = false) const;
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};
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} // end namespace opt
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} // end namespace llvm
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#endif
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