140 lines
4.6 KiB
C++
140 lines
4.6 KiB
C++
//===--- CommentCommandTraits.cpp - Comment command properties --*- 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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#include "clang/AST/CommentCommandTraits.h"
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#include "llvm/ADT/STLExtras.h"
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namespace clang {
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namespace comments {
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#include "clang/AST/CommentCommandInfo.inc"
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CommandTraits::CommandTraits(llvm::BumpPtrAllocator &Allocator,
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const CommentOptions &CommentOptions) :
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NextID(llvm::array_lengthof(Commands)), Allocator(Allocator) {
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registerCommentOptions(CommentOptions);
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}
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void CommandTraits::registerCommentOptions(
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const CommentOptions &CommentOptions) {
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for (CommentOptions::BlockCommandNamesTy::const_iterator
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I = CommentOptions.BlockCommandNames.begin(),
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E = CommentOptions.BlockCommandNames.end();
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I != E; I++) {
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registerBlockCommand(*I);
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}
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}
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const CommandInfo *CommandTraits::getCommandInfoOrNULL(StringRef Name) const {
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if (const CommandInfo *Info = getBuiltinCommandInfo(Name))
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return Info;
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return getRegisteredCommandInfo(Name);
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}
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const CommandInfo *CommandTraits::getCommandInfo(unsigned CommandID) const {
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if (const CommandInfo *Info = getBuiltinCommandInfo(CommandID))
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return Info;
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return getRegisteredCommandInfo(CommandID);
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}
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static void
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HelperTypoCorrectCommandInfo(SmallVectorImpl<const CommandInfo *> &BestCommand,
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StringRef Typo, const CommandInfo *Command) {
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const unsigned MaxEditDistance = 1;
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unsigned BestEditDistance = MaxEditDistance + 1;
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StringRef Name = Command->Name;
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unsigned MinPossibleEditDistance = abs((int)Name.size() - (int)Typo.size());
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if (MinPossibleEditDistance > 0 &&
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Typo.size() / MinPossibleEditDistance < 1)
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return;
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unsigned EditDistance = Typo.edit_distance(Name, true, MaxEditDistance);
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if (EditDistance > MaxEditDistance)
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return;
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if (EditDistance == BestEditDistance)
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BestCommand.push_back(Command);
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else if (EditDistance < BestEditDistance) {
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BestCommand.clear();
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BestCommand.push_back(Command);
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BestEditDistance = EditDistance;
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}
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}
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const CommandInfo *
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CommandTraits::getTypoCorrectCommandInfo(StringRef Typo) const {
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// single character command impostures, such as \t or \n must not go
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// through the fixit logic.
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if (Typo.size() <= 1)
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return NULL;
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SmallVector<const CommandInfo *, 2> BestCommand;
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const int NumOfCommands = llvm::array_lengthof(Commands);
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for (int i = 0; i < NumOfCommands; i++)
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HelperTypoCorrectCommandInfo(BestCommand, Typo, &Commands[i]);
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for (unsigned i = 0, e = RegisteredCommands.size(); i != e; ++i)
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if (!RegisteredCommands[i]->IsUnknownCommand)
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HelperTypoCorrectCommandInfo(BestCommand, Typo, RegisteredCommands[i]);
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return (BestCommand.size() != 1) ? NULL : BestCommand[0];
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}
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CommandInfo *CommandTraits::createCommandInfoWithName(StringRef CommandName) {
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char *Name = Allocator.Allocate<char>(CommandName.size() + 1);
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memcpy(Name, CommandName.data(), CommandName.size());
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Name[CommandName.size()] = '\0';
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// Value-initialize (=zero-initialize in this case) a new CommandInfo.
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CommandInfo *Info = new (Allocator) CommandInfo();
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Info->Name = Name;
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Info->ID = NextID++;
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RegisteredCommands.push_back(Info);
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return Info;
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}
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const CommandInfo *CommandTraits::registerUnknownCommand(
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StringRef CommandName) {
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CommandInfo *Info = createCommandInfoWithName(CommandName);
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Info->IsUnknownCommand = true;
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return Info;
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}
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const CommandInfo *CommandTraits::registerBlockCommand(StringRef CommandName) {
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CommandInfo *Info = createCommandInfoWithName(CommandName);
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Info->IsBlockCommand = true;
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return Info;
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}
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const CommandInfo *CommandTraits::getBuiltinCommandInfo(
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unsigned CommandID) {
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if (CommandID < llvm::array_lengthof(Commands))
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return &Commands[CommandID];
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return NULL;
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}
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const CommandInfo *CommandTraits::getRegisteredCommandInfo(
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StringRef Name) const {
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for (unsigned i = 0, e = RegisteredCommands.size(); i != e; ++i) {
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if (RegisteredCommands[i]->Name == Name)
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return RegisteredCommands[i];
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}
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return NULL;
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}
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const CommandInfo *CommandTraits::getRegisteredCommandInfo(
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unsigned CommandID) const {
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return RegisteredCommands[CommandID - llvm::array_lengthof(Commands)];
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}
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} // end namespace comments
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} // end namespace clang
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