575 lines
18 KiB
C++
575 lines
18 KiB
C++
//===- OptTable.cpp - Option Table Implementation -------------------------===//
|
|
//
|
|
// The LLVM Compiler Infrastructure
|
|
//
|
|
// This file is distributed under the University of Illinois Open Source
|
|
// License. See LICENSE.TXT for details.
|
|
//
|
|
//===----------------------------------------------------------------------===//
|
|
|
|
#include "llvm/ADT/STLExtras.h"
|
|
#include "llvm/ADT/StringRef.h"
|
|
#include "llvm/ADT/StringSet.h"
|
|
#include "llvm/Option/Arg.h"
|
|
#include "llvm/Option/ArgList.h"
|
|
#include "llvm/Option/Option.h"
|
|
#include "llvm/Option/OptSpecifier.h"
|
|
#include "llvm/Option/OptTable.h"
|
|
#include "llvm/Support/Compiler.h"
|
|
#include "llvm/Support/ErrorHandling.h"
|
|
#include "llvm/Support/raw_ostream.h"
|
|
#include <algorithm>
|
|
#include <cassert>
|
|
#include <cctype>
|
|
#include <cstring>
|
|
#include <map>
|
|
#include <string>
|
|
#include <utility>
|
|
#include <vector>
|
|
|
|
using namespace llvm;
|
|
using namespace llvm::opt;
|
|
|
|
namespace llvm {
|
|
namespace opt {
|
|
|
|
// Ordering on Info. The ordering is *almost* case-insensitive lexicographic,
|
|
// with an exception. '\0' comes at the end of the alphabet instead of the
|
|
// beginning (thus options precede any other options which prefix them).
|
|
static int StrCmpOptionNameIgnoreCase(const char *A, const char *B) {
|
|
const char *X = A, *Y = B;
|
|
char a = tolower(*A), b = tolower(*B);
|
|
while (a == b) {
|
|
if (a == '\0')
|
|
return 0;
|
|
|
|
a = tolower(*++X);
|
|
b = tolower(*++Y);
|
|
}
|
|
|
|
if (a == '\0') // A is a prefix of B.
|
|
return 1;
|
|
if (b == '\0') // B is a prefix of A.
|
|
return -1;
|
|
|
|
// Otherwise lexicographic.
|
|
return (a < b) ? -1 : 1;
|
|
}
|
|
|
|
#ifndef NDEBUG
|
|
static int StrCmpOptionName(const char *A, const char *B) {
|
|
if (int N = StrCmpOptionNameIgnoreCase(A, B))
|
|
return N;
|
|
return strcmp(A, B);
|
|
}
|
|
|
|
static inline bool operator<(const OptTable::Info &A, const OptTable::Info &B) {
|
|
if (&A == &B)
|
|
return false;
|
|
|
|
if (int N = StrCmpOptionName(A.Name, B.Name))
|
|
return N < 0;
|
|
|
|
for (const char * const *APre = A.Prefixes,
|
|
* const *BPre = B.Prefixes;
|
|
*APre != nullptr && *BPre != nullptr; ++APre, ++BPre){
|
|
if (int N = StrCmpOptionName(*APre, *BPre))
|
|
return N < 0;
|
|
}
|
|
|
|
// Names are the same, check that classes are in order; exactly one
|
|
// should be joined, and it should succeed the other.
|
|
assert(((A.Kind == Option::JoinedClass) ^ (B.Kind == Option::JoinedClass)) &&
|
|
"Unexpected classes for options with same name.");
|
|
return B.Kind == Option::JoinedClass;
|
|
}
|
|
#endif
|
|
|
|
// Support lower_bound between info and an option name.
|
|
static inline bool operator<(const OptTable::Info &I, const char *Name) {
|
|
return StrCmpOptionNameIgnoreCase(I.Name, Name) < 0;
|
|
}
|
|
|
|
} // end namespace opt
|
|
} // end namespace llvm
|
|
|
|
OptSpecifier::OptSpecifier(const Option *Opt) : ID(Opt->getID()) {}
|
|
|
|
OptTable::OptTable(ArrayRef<Info> OptionInfos, bool IgnoreCase)
|
|
: OptionInfos(OptionInfos), IgnoreCase(IgnoreCase) {
|
|
// Explicitly zero initialize the error to work around a bug in array
|
|
// value-initialization on MinGW with gcc 4.3.5.
|
|
|
|
// Find start of normal options.
|
|
for (unsigned i = 0, e = getNumOptions(); i != e; ++i) {
|
|
unsigned Kind = getInfo(i + 1).Kind;
|
|
if (Kind == Option::InputClass) {
|
|
assert(!TheInputOptionID && "Cannot have multiple input options!");
|
|
TheInputOptionID = getInfo(i + 1).ID;
|
|
} else if (Kind == Option::UnknownClass) {
|
|
assert(!TheUnknownOptionID && "Cannot have multiple unknown options!");
|
|
TheUnknownOptionID = getInfo(i + 1).ID;
|
|
} else if (Kind != Option::GroupClass) {
|
|
FirstSearchableIndex = i;
|
|
break;
|
|
}
|
|
}
|
|
assert(FirstSearchableIndex != 0 && "No searchable options?");
|
|
|
|
#ifndef NDEBUG
|
|
// Check that everything after the first searchable option is a
|
|
// regular option class.
|
|
for (unsigned i = FirstSearchableIndex, e = getNumOptions(); i != e; ++i) {
|
|
Option::OptionClass Kind = (Option::OptionClass) getInfo(i + 1).Kind;
|
|
assert((Kind != Option::InputClass && Kind != Option::UnknownClass &&
|
|
Kind != Option::GroupClass) &&
|
|
"Special options should be defined first!");
|
|
}
|
|
|
|
// Check that options are in order.
|
|
for (unsigned i = FirstSearchableIndex + 1, e = getNumOptions(); i != e; ++i){
|
|
if (!(getInfo(i) < getInfo(i + 1))) {
|
|
getOption(i).dump();
|
|
getOption(i + 1).dump();
|
|
llvm_unreachable("Options are not in order!");
|
|
}
|
|
}
|
|
#endif
|
|
|
|
// Build prefixes.
|
|
for (unsigned i = FirstSearchableIndex + 1, e = getNumOptions() + 1;
|
|
i != e; ++i) {
|
|
if (const char *const *P = getInfo(i).Prefixes) {
|
|
for (; *P != nullptr; ++P) {
|
|
PrefixesUnion.insert(*P);
|
|
}
|
|
}
|
|
}
|
|
|
|
// Build prefix chars.
|
|
for (StringSet<>::const_iterator I = PrefixesUnion.begin(),
|
|
E = PrefixesUnion.end(); I != E; ++I) {
|
|
StringRef Prefix = I->getKey();
|
|
for (StringRef::const_iterator C = Prefix.begin(), CE = Prefix.end();
|
|
C != CE; ++C)
|
|
if (!is_contained(PrefixChars, *C))
|
|
PrefixChars.push_back(*C);
|
|
}
|
|
}
|
|
|
|
OptTable::~OptTable() = default;
|
|
|
|
const Option OptTable::getOption(OptSpecifier Opt) const {
|
|
unsigned id = Opt.getID();
|
|
if (id == 0)
|
|
return Option(nullptr, nullptr);
|
|
assert((unsigned) (id - 1) < getNumOptions() && "Invalid ID.");
|
|
return Option(&getInfo(id), this);
|
|
}
|
|
|
|
static bool isInput(const StringSet<> &Prefixes, StringRef Arg) {
|
|
if (Arg == "-")
|
|
return true;
|
|
for (StringSet<>::const_iterator I = Prefixes.begin(),
|
|
E = Prefixes.end(); I != E; ++I)
|
|
if (Arg.startswith(I->getKey()))
|
|
return false;
|
|
return true;
|
|
}
|
|
|
|
/// \returns Matched size. 0 means no match.
|
|
static unsigned matchOption(const OptTable::Info *I, StringRef Str,
|
|
bool IgnoreCase) {
|
|
for (const char * const *Pre = I->Prefixes; *Pre != nullptr; ++Pre) {
|
|
StringRef Prefix(*Pre);
|
|
if (Str.startswith(Prefix)) {
|
|
StringRef Rest = Str.substr(Prefix.size());
|
|
bool Matched = IgnoreCase
|
|
? Rest.startswith_lower(I->Name)
|
|
: Rest.startswith(I->Name);
|
|
if (Matched)
|
|
return Prefix.size() + StringRef(I->Name).size();
|
|
}
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
// Returns true if one of the Prefixes + In.Names matches Option
|
|
static bool optionMatches(const OptTable::Info &In, StringRef Option) {
|
|
if (In.Prefixes)
|
|
for (size_t I = 0; In.Prefixes[I]; I++)
|
|
if (Option == std::string(In.Prefixes[I]) + In.Name)
|
|
return true;
|
|
return false;
|
|
}
|
|
|
|
// This function is for flag value completion.
|
|
// Eg. When "-stdlib=" and "l" was passed to this function, it will return
|
|
// appropiriate values for stdlib, which starts with l.
|
|
std::vector<std::string>
|
|
OptTable::suggestValueCompletions(StringRef Option, StringRef Arg) const {
|
|
// Search all options and return possible values.
|
|
for (size_t I = FirstSearchableIndex, E = OptionInfos.size(); I < E; I++) {
|
|
const Info &In = OptionInfos[I];
|
|
if (!In.Values || !optionMatches(In, Option))
|
|
continue;
|
|
|
|
SmallVector<StringRef, 8> Candidates;
|
|
StringRef(In.Values).split(Candidates, ",", -1, false);
|
|
|
|
std::vector<std::string> Result;
|
|
for (StringRef Val : Candidates)
|
|
if (Val.startswith(Arg) && Arg.compare(Val))
|
|
Result.push_back(Val);
|
|
return Result;
|
|
}
|
|
return {};
|
|
}
|
|
|
|
std::vector<std::string>
|
|
OptTable::findByPrefix(StringRef Cur, unsigned short DisableFlags) const {
|
|
std::vector<std::string> Ret;
|
|
for (size_t I = FirstSearchableIndex, E = OptionInfos.size(); I < E; I++) {
|
|
const Info &In = OptionInfos[I];
|
|
if (!In.Prefixes || (!In.HelpText && !In.GroupID))
|
|
continue;
|
|
if (In.Flags & DisableFlags)
|
|
continue;
|
|
|
|
for (int I = 0; In.Prefixes[I]; I++) {
|
|
std::string S = std::string(In.Prefixes[I]) + std::string(In.Name) + "\t";
|
|
if (In.HelpText)
|
|
S += In.HelpText;
|
|
if (StringRef(S).startswith(Cur) && S.compare(std::string(Cur) + "\t"))
|
|
Ret.push_back(S);
|
|
}
|
|
}
|
|
return Ret;
|
|
}
|
|
|
|
unsigned OptTable::findNearest(StringRef Option, std::string &NearestString,
|
|
unsigned FlagsToInclude, unsigned FlagsToExclude,
|
|
unsigned MinimumLength) const {
|
|
assert(!Option.empty());
|
|
|
|
// Consider each option as a candidate, finding the closest match.
|
|
unsigned BestDistance = UINT_MAX;
|
|
for (const Info &CandidateInfo :
|
|
ArrayRef<Info>(OptionInfos).drop_front(FirstSearchableIndex)) {
|
|
StringRef CandidateName = CandidateInfo.Name;
|
|
|
|
// Ignore option candidates with empty names, such as "--", or names
|
|
// that do not meet the minimum length.
|
|
if (CandidateName.empty() || CandidateName.size() < MinimumLength)
|
|
continue;
|
|
|
|
// If FlagsToInclude were specified, ignore options that don't include
|
|
// those flags.
|
|
if (FlagsToInclude && !(CandidateInfo.Flags & FlagsToInclude))
|
|
continue;
|
|
// Ignore options that contain the FlagsToExclude.
|
|
if (CandidateInfo.Flags & FlagsToExclude)
|
|
continue;
|
|
|
|
// Ignore positional argument option candidates (which do not
|
|
// have prefixes).
|
|
if (!CandidateInfo.Prefixes)
|
|
continue;
|
|
// Find the most appropriate prefix. For example, if a user asks for
|
|
// "--helm", suggest "--help" over "-help".
|
|
StringRef Prefix = CandidateInfo.Prefixes[0];
|
|
for (int P = 1; CandidateInfo.Prefixes[P]; P++) {
|
|
if (Option.startswith(CandidateInfo.Prefixes[P]))
|
|
Prefix = CandidateInfo.Prefixes[P];
|
|
}
|
|
|
|
// Check if the candidate ends with a character commonly used when
|
|
// delimiting an option from its value, such as '=' or ':'. If it does,
|
|
// attempt to split the given option based on that delimiter.
|
|
std::string Delimiter = "";
|
|
char Last = CandidateName.back();
|
|
if (Last == '=' || Last == ':')
|
|
Delimiter = std::string(1, Last);
|
|
|
|
StringRef LHS, RHS;
|
|
if (Delimiter.empty())
|
|
LHS = Option;
|
|
else
|
|
std::tie(LHS, RHS) = Option.split(Last);
|
|
|
|
std::string NormalizedName =
|
|
(LHS.drop_front(Prefix.size()) + Delimiter).str();
|
|
unsigned Distance =
|
|
CandidateName.edit_distance(NormalizedName, /*AllowReplacements=*/true,
|
|
/*MaxEditDistance=*/BestDistance);
|
|
if (Distance < BestDistance) {
|
|
BestDistance = Distance;
|
|
NearestString = (Prefix + CandidateName + RHS).str();
|
|
}
|
|
}
|
|
return BestDistance;
|
|
}
|
|
|
|
bool OptTable::addValues(const char *Option, const char *Values) {
|
|
for (size_t I = FirstSearchableIndex, E = OptionInfos.size(); I < E; I++) {
|
|
Info &In = OptionInfos[I];
|
|
if (optionMatches(In, Option)) {
|
|
In.Values = Values;
|
|
return true;
|
|
}
|
|
}
|
|
return false;
|
|
}
|
|
|
|
Arg *OptTable::ParseOneArg(const ArgList &Args, unsigned &Index,
|
|
unsigned FlagsToInclude,
|
|
unsigned FlagsToExclude) const {
|
|
unsigned Prev = Index;
|
|
const char *Str = Args.getArgString(Index);
|
|
|
|
// Anything that doesn't start with PrefixesUnion is an input, as is '-'
|
|
// itself.
|
|
if (isInput(PrefixesUnion, Str))
|
|
return new Arg(getOption(TheInputOptionID), Str, Index++, Str);
|
|
|
|
const Info *Start = OptionInfos.data() + FirstSearchableIndex;
|
|
const Info *End = OptionInfos.data() + OptionInfos.size();
|
|
StringRef Name = StringRef(Str).ltrim(PrefixChars);
|
|
|
|
// Search for the first next option which could be a prefix.
|
|
Start = std::lower_bound(Start, End, Name.data());
|
|
|
|
// Options are stored in sorted order, with '\0' at the end of the
|
|
// alphabet. Since the only options which can accept a string must
|
|
// prefix it, we iteratively search for the next option which could
|
|
// be a prefix.
|
|
//
|
|
// FIXME: This is searching much more than necessary, but I am
|
|
// blanking on the simplest way to make it fast. We can solve this
|
|
// problem when we move to TableGen.
|
|
for (; Start != End; ++Start) {
|
|
unsigned ArgSize = 0;
|
|
// Scan for first option which is a proper prefix.
|
|
for (; Start != End; ++Start)
|
|
if ((ArgSize = matchOption(Start, Str, IgnoreCase)))
|
|
break;
|
|
if (Start == End)
|
|
break;
|
|
|
|
Option Opt(Start, this);
|
|
|
|
if (FlagsToInclude && !Opt.hasFlag(FlagsToInclude))
|
|
continue;
|
|
if (Opt.hasFlag(FlagsToExclude))
|
|
continue;
|
|
|
|
// See if this option matches.
|
|
if (Arg *A = Opt.accept(Args, Index, ArgSize))
|
|
return A;
|
|
|
|
// Otherwise, see if this argument was missing values.
|
|
if (Prev != Index)
|
|
return nullptr;
|
|
}
|
|
|
|
// If we failed to find an option and this arg started with /, then it's
|
|
// probably an input path.
|
|
if (Str[0] == '/')
|
|
return new Arg(getOption(TheInputOptionID), Str, Index++, Str);
|
|
|
|
return new Arg(getOption(TheUnknownOptionID), Str, Index++, Str);
|
|
}
|
|
|
|
InputArgList OptTable::ParseArgs(ArrayRef<const char *> ArgArr,
|
|
unsigned &MissingArgIndex,
|
|
unsigned &MissingArgCount,
|
|
unsigned FlagsToInclude,
|
|
unsigned FlagsToExclude) const {
|
|
InputArgList Args(ArgArr.begin(), ArgArr.end());
|
|
|
|
// FIXME: Handle '@' args (or at least error on them).
|
|
|
|
MissingArgIndex = MissingArgCount = 0;
|
|
unsigned Index = 0, End = ArgArr.size();
|
|
while (Index < End) {
|
|
// Ingore nullptrs, they are response file's EOL markers
|
|
if (Args.getArgString(Index) == nullptr) {
|
|
++Index;
|
|
continue;
|
|
}
|
|
// Ignore empty arguments (other things may still take them as arguments).
|
|
StringRef Str = Args.getArgString(Index);
|
|
if (Str == "") {
|
|
++Index;
|
|
continue;
|
|
}
|
|
|
|
unsigned Prev = Index;
|
|
Arg *A = ParseOneArg(Args, Index, FlagsToInclude, FlagsToExclude);
|
|
assert(Index > Prev && "Parser failed to consume argument.");
|
|
|
|
// Check for missing argument error.
|
|
if (!A) {
|
|
assert(Index >= End && "Unexpected parser error.");
|
|
assert(Index - Prev - 1 && "No missing arguments!");
|
|
MissingArgIndex = Prev;
|
|
MissingArgCount = Index - Prev - 1;
|
|
break;
|
|
}
|
|
|
|
Args.append(A);
|
|
}
|
|
|
|
return Args;
|
|
}
|
|
|
|
static std::string getOptionHelpName(const OptTable &Opts, OptSpecifier Id) {
|
|
const Option O = Opts.getOption(Id);
|
|
std::string Name = O.getPrefixedName();
|
|
|
|
// Add metavar, if used.
|
|
switch (O.getKind()) {
|
|
case Option::GroupClass: case Option::InputClass: case Option::UnknownClass:
|
|
llvm_unreachable("Invalid option with help text.");
|
|
|
|
case Option::MultiArgClass:
|
|
if (const char *MetaVarName = Opts.getOptionMetaVar(Id)) {
|
|
// For MultiArgs, metavar is full list of all argument names.
|
|
Name += ' ';
|
|
Name += MetaVarName;
|
|
}
|
|
else {
|
|
// For MultiArgs<N>, if metavar not supplied, print <value> N times.
|
|
for (unsigned i=0, e=O.getNumArgs(); i< e; ++i) {
|
|
Name += " <value>";
|
|
}
|
|
}
|
|
break;
|
|
|
|
case Option::FlagClass:
|
|
break;
|
|
|
|
case Option::ValuesClass:
|
|
break;
|
|
|
|
case Option::SeparateClass: case Option::JoinedOrSeparateClass:
|
|
case Option::RemainingArgsClass: case Option::RemainingArgsJoinedClass:
|
|
Name += ' ';
|
|
LLVM_FALLTHROUGH;
|
|
case Option::JoinedClass: case Option::CommaJoinedClass:
|
|
case Option::JoinedAndSeparateClass:
|
|
if (const char *MetaVarName = Opts.getOptionMetaVar(Id))
|
|
Name += MetaVarName;
|
|
else
|
|
Name += "<value>";
|
|
break;
|
|
}
|
|
|
|
return Name;
|
|
}
|
|
|
|
namespace {
|
|
struct OptionInfo {
|
|
std::string Name;
|
|
StringRef HelpText;
|
|
};
|
|
} // namespace
|
|
|
|
static void PrintHelpOptionList(raw_ostream &OS, StringRef Title,
|
|
std::vector<OptionInfo> &OptionHelp) {
|
|
OS << Title << ":\n";
|
|
|
|
// Find the maximum option length.
|
|
unsigned OptionFieldWidth = 0;
|
|
for (unsigned i = 0, e = OptionHelp.size(); i != e; ++i) {
|
|
// Limit the amount of padding we are willing to give up for alignment.
|
|
unsigned Length = OptionHelp[i].Name.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].Name;
|
|
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].HelpText << '\n';
|
|
}
|
|
}
|
|
|
|
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);
|
|
}
|
|
|
|
void OptTable::PrintHelp(raw_ostream &OS, const char *Usage, const char *Title,
|
|
bool ShowHidden, bool ShowAllAliases) const {
|
|
PrintHelp(OS, Usage, Title, /*Include*/ 0, /*Exclude*/
|
|
(ShowHidden ? 0 : HelpHidden), ShowAllAliases);
|
|
}
|
|
|
|
void OptTable::PrintHelp(raw_ostream &OS, const char *Usage, const char *Title,
|
|
unsigned FlagsToInclude, unsigned FlagsToExclude,
|
|
bool ShowAllAliases) const {
|
|
OS << "OVERVIEW: " << Title << "\n\n";
|
|
OS << "USAGE: " << Usage << "\n\n";
|
|
|
|
// Render help text into a map of group-name to a list of (option, help)
|
|
// pairs.
|
|
std::map<std::string, std::vector<OptionInfo>> GroupedOptionHelp;
|
|
|
|
for (unsigned Id = 1, e = getNumOptions() + 1; Id != e; ++Id) {
|
|
// FIXME: Split out option groups.
|
|
if (getOptionKind(Id) == Option::GroupClass)
|
|
continue;
|
|
|
|
unsigned Flags = getInfo(Id).Flags;
|
|
if (FlagsToInclude && !(Flags & FlagsToInclude))
|
|
continue;
|
|
if (Flags & FlagsToExclude)
|
|
continue;
|
|
|
|
// If an alias doesn't have a help text, show a help text for the aliased
|
|
// option instead.
|
|
const char *HelpText = getOptionHelpText(Id);
|
|
if (!HelpText && ShowAllAliases) {
|
|
const Option Alias = getOption(Id).getAlias();
|
|
if (Alias.isValid())
|
|
HelpText = getOptionHelpText(Alias.getID());
|
|
}
|
|
|
|
if (HelpText) {
|
|
const char *HelpGroup = getOptionHelpGroup(*this, Id);
|
|
const std::string &OptName = getOptionHelpName(*this, Id);
|
|
GroupedOptionHelp[HelpGroup].push_back({OptName, HelpText});
|
|
}
|
|
}
|
|
|
|
for (auto& OptionGroup : GroupedOptionHelp) {
|
|
if (OptionGroup.first != GroupedOptionHelp.begin()->first)
|
|
OS << "\n";
|
|
PrintHelpOptionList(OS, OptionGroup.first, OptionGroup.second);
|
|
}
|
|
|
|
OS.flush();
|
|
}
|