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87d13166c7
This is how it should've been and brings it more in line with std::string_view. There should be no functional change here. This is mostly mechanical from a custom clang-tidy check, with a lot of manual fixups. It uncovers a lot of minor inefficiencies. This doesn't actually modify StringRef yet, I'll do that in a follow-up.
275 lines
8.6 KiB
C++
275 lines
8.6 KiB
C++
//===- ArgList.cpp - Argument List Management -----------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#include "llvm/ADT/ArrayRef.h"
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#include "llvm/ADT/None.h"
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#include "llvm/ADT/SmallVector.h"
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#include "llvm/ADT/STLExtras.h"
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#include "llvm/ADT/StringRef.h"
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#include "llvm/ADT/Twine.h"
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#include "llvm/Config/llvm-config.h"
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#include "llvm/Option/Arg.h"
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#include "llvm/Option/ArgList.h"
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#include "llvm/Option/Option.h"
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#include "llvm/Option/OptSpecifier.h"
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#include "llvm/Support/Compiler.h"
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#include "llvm/Support/Debug.h"
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#include "llvm/Support/raw_ostream.h"
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#include <algorithm>
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#include <cassert>
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#include <memory>
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#include <string>
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#include <utility>
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#include <vector>
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using namespace llvm;
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using namespace llvm::opt;
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void ArgList::append(Arg *A) {
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Args.push_back(A);
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// Update ranges for the option and all of its groups.
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for (Option O = A->getOption().getUnaliasedOption(); O.isValid();
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O = O.getGroup()) {
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auto &R =
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OptRanges.insert(std::make_pair(O.getID(), emptyRange())).first->second;
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R.first = std::min<unsigned>(R.first, Args.size() - 1);
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R.second = Args.size();
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}
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}
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void ArgList::eraseArg(OptSpecifier Id) {
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// Zero out the removed entries but keep them around so that we don't
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// need to invalidate OptRanges.
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for (Arg *const &A : filtered(Id)) {
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// Avoid the need for a non-const filtered iterator variant.
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Arg **ArgsBegin = Args.data();
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ArgsBegin[&A - ArgsBegin] = nullptr;
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}
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OptRanges.erase(Id.getID());
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}
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ArgList::OptRange
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ArgList::getRange(std::initializer_list<OptSpecifier> Ids) const {
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OptRange R = emptyRange();
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for (auto Id : Ids) {
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auto I = OptRanges.find(Id.getID());
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if (I != OptRanges.end()) {
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R.first = std::min(R.first, I->second.first);
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R.second = std::max(R.second, I->second.second);
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}
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}
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// Map an empty {-1, 0} range to {0, 0} so it can be used to form iterators.
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if (R.first == -1u)
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R.first = 0;
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return R;
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}
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bool ArgList::hasFlag(OptSpecifier Pos, OptSpecifier Neg, bool Default) const {
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if (Arg *A = getLastArg(Pos, Neg))
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return A->getOption().matches(Pos);
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return Default;
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}
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bool ArgList::hasFlag(OptSpecifier Pos, OptSpecifier PosAlias, OptSpecifier Neg,
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bool Default) const {
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if (Arg *A = getLastArg(Pos, PosAlias, Neg))
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return A->getOption().matches(Pos) || A->getOption().matches(PosAlias);
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return Default;
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}
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StringRef ArgList::getLastArgValue(OptSpecifier Id, StringRef Default) const {
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if (Arg *A = getLastArg(Id))
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return A->getValue();
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return Default;
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}
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std::vector<std::string> ArgList::getAllArgValues(OptSpecifier Id) const {
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SmallVector<const char *, 16> Values;
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AddAllArgValues(Values, Id);
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return std::vector<std::string>(Values.begin(), Values.end());
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}
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void ArgList::AddAllArgsExcept(ArgStringList &Output,
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ArrayRef<OptSpecifier> Ids,
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ArrayRef<OptSpecifier> ExcludeIds) const {
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for (const Arg *Arg : *this) {
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bool Excluded = false;
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for (OptSpecifier Id : ExcludeIds) {
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if (Arg->getOption().matches(Id)) {
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Excluded = true;
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break;
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}
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}
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if (!Excluded) {
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for (OptSpecifier Id : Ids) {
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if (Arg->getOption().matches(Id)) {
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Arg->claim();
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Arg->render(*this, Output);
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break;
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}
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}
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}
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}
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}
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/// This is a nicer interface when you don't have a list of Ids to exclude.
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void ArgList::AddAllArgs(ArgStringList &Output,
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ArrayRef<OptSpecifier> Ids) const {
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ArrayRef<OptSpecifier> Exclude = None;
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AddAllArgsExcept(Output, Ids, Exclude);
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}
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/// This 3-opt variant of AddAllArgs could be eliminated in favor of one
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/// that accepts a single specifier, given the above which accepts any number.
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void ArgList::AddAllArgs(ArgStringList &Output, OptSpecifier Id0,
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OptSpecifier Id1, OptSpecifier Id2) const {
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for (auto Arg: filtered(Id0, Id1, Id2)) {
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Arg->claim();
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Arg->render(*this, Output);
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}
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}
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void ArgList::AddAllArgValues(ArgStringList &Output, OptSpecifier Id0,
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OptSpecifier Id1, OptSpecifier Id2) const {
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for (auto Arg : filtered(Id0, Id1, Id2)) {
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Arg->claim();
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const auto &Values = Arg->getValues();
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Output.append(Values.begin(), Values.end());
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}
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}
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void ArgList::AddAllArgsTranslated(ArgStringList &Output, OptSpecifier Id0,
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const char *Translation,
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bool Joined) const {
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for (auto Arg: filtered(Id0)) {
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Arg->claim();
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if (Joined) {
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Output.push_back(MakeArgString(StringRef(Translation) +
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Arg->getValue(0)));
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} else {
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Output.push_back(Translation);
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Output.push_back(Arg->getValue(0));
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}
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}
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}
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void ArgList::ClaimAllArgs(OptSpecifier Id0) const {
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for (auto *Arg : filtered(Id0))
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Arg->claim();
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}
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void ArgList::ClaimAllArgs() const {
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for (auto *Arg : *this)
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if (!Arg->isClaimed())
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Arg->claim();
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}
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const char *ArgList::GetOrMakeJoinedArgString(unsigned Index,
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StringRef LHS,
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StringRef RHS) const {
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StringRef Cur = getArgString(Index);
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if (Cur.size() == LHS.size() + RHS.size() &&
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Cur.startswith(LHS) && Cur.endswith(RHS))
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return Cur.data();
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return MakeArgString(LHS + RHS);
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}
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void ArgList::print(raw_ostream &O) const {
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for (Arg *A : *this) {
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O << "* ";
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A->print(O);
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}
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}
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#if !defined(NDEBUG) || defined(LLVM_ENABLE_DUMP)
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LLVM_DUMP_METHOD void ArgList::dump() const { print(dbgs()); }
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#endif
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void InputArgList::releaseMemory() {
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// An InputArgList always owns its arguments.
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for (Arg *A : *this)
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delete A;
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}
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InputArgList::InputArgList(const char* const *ArgBegin,
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const char* const *ArgEnd)
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: NumInputArgStrings(ArgEnd - ArgBegin) {
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ArgStrings.append(ArgBegin, ArgEnd);
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}
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unsigned InputArgList::MakeIndex(StringRef String0) const {
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unsigned Index = ArgStrings.size();
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// Tuck away so we have a reliable const char *.
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SynthesizedStrings.push_back(std::string(String0));
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ArgStrings.push_back(SynthesizedStrings.back().c_str());
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return Index;
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}
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unsigned InputArgList::MakeIndex(StringRef String0,
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StringRef String1) const {
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unsigned Index0 = MakeIndex(String0);
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unsigned Index1 = MakeIndex(String1);
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assert(Index0 + 1 == Index1 && "Unexpected non-consecutive indices!");
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(void) Index1;
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return Index0;
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}
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const char *InputArgList::MakeArgStringRef(StringRef Str) const {
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return getArgString(MakeIndex(Str));
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}
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DerivedArgList::DerivedArgList(const InputArgList &BaseArgs)
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: BaseArgs(BaseArgs) {}
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const char *DerivedArgList::MakeArgStringRef(StringRef Str) const {
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return BaseArgs.MakeArgString(Str);
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}
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void DerivedArgList::AddSynthesizedArg(Arg *A) {
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SynthesizedArgs.push_back(std::unique_ptr<Arg>(A));
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}
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Arg *DerivedArgList::MakeFlagArg(const Arg *BaseArg, const Option Opt) const {
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SynthesizedArgs.push_back(
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std::make_unique<Arg>(Opt, MakeArgString(Opt.getPrefix() + Opt.getName()),
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BaseArgs.MakeIndex(Opt.getName()), BaseArg));
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return SynthesizedArgs.back().get();
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}
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Arg *DerivedArgList::MakePositionalArg(const Arg *BaseArg, const Option Opt,
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StringRef Value) const {
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unsigned Index = BaseArgs.MakeIndex(Value);
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SynthesizedArgs.push_back(
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std::make_unique<Arg>(Opt, MakeArgString(Opt.getPrefix() + Opt.getName()),
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Index, BaseArgs.getArgString(Index), BaseArg));
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return SynthesizedArgs.back().get();
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}
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Arg *DerivedArgList::MakeSeparateArg(const Arg *BaseArg, const Option Opt,
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StringRef Value) const {
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unsigned Index = BaseArgs.MakeIndex(Opt.getName(), Value);
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SynthesizedArgs.push_back(
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std::make_unique<Arg>(Opt, MakeArgString(Opt.getPrefix() + Opt.getName()),
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Index, BaseArgs.getArgString(Index + 1), BaseArg));
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return SynthesizedArgs.back().get();
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}
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Arg *DerivedArgList::MakeJoinedArg(const Arg *BaseArg, const Option Opt,
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StringRef Value) const {
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unsigned Index = BaseArgs.MakeIndex((Opt.getName() + Value).str());
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SynthesizedArgs.push_back(std::make_unique<Arg>(
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Opt, MakeArgString(Opt.getPrefix() + Opt.getName()), Index,
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BaseArgs.getArgString(Index) + Opt.getName().size(), BaseArg));
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return SynthesizedArgs.back().get();
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}
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