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      1 //===--- CommentCommandTraits.cpp - Comment command properties --*- C++ -*-===//
      2 //
      3 //                     The LLVM Compiler Infrastructure
      4 //
      5 // This file is distributed under the University of Illinois Open Source
      6 // License. See LICENSE.TXT for details.
      7 //
      8 //===----------------------------------------------------------------------===//
      9 
     10 #include "clang/AST/CommentCommandTraits.h"
     11 #include "llvm/ADT/STLExtras.h"
     12 
     13 namespace clang {
     14 namespace comments {
     15 
     16 #include "clang/AST/CommentCommandInfo.inc"
     17 
     18 CommandTraits::CommandTraits(llvm::BumpPtrAllocator &Allocator,
     19                              const CommentOptions &CommentOptions) :
     20     NextID(llvm::array_lengthof(Commands)), Allocator(Allocator) {
     21   registerCommentOptions(CommentOptions);
     22 }
     23 
     24 void CommandTraits::registerCommentOptions(
     25     const CommentOptions &CommentOptions) {
     26   for (CommentOptions::BlockCommandNamesTy::const_iterator
     27            I = CommentOptions.BlockCommandNames.begin(),
     28            E = CommentOptions.BlockCommandNames.end();
     29        I != E; I++) {
     30     registerBlockCommand(*I);
     31   }
     32 }
     33 
     34 const CommandInfo *CommandTraits::getCommandInfoOrNULL(StringRef Name) const {
     35   if (const CommandInfo *Info = getBuiltinCommandInfo(Name))
     36     return Info;
     37   return getRegisteredCommandInfo(Name);
     38 }
     39 
     40 const CommandInfo *CommandTraits::getCommandInfo(unsigned CommandID) const {
     41   if (const CommandInfo *Info = getBuiltinCommandInfo(CommandID))
     42     return Info;
     43   return getRegisteredCommandInfo(CommandID);
     44 }
     45 
     46 CommandInfo *CommandTraits::createCommandInfoWithName(StringRef CommandName) {
     47   char *Name = Allocator.Allocate<char>(CommandName.size() + 1);
     48   memcpy(Name, CommandName.data(), CommandName.size());
     49   Name[CommandName.size()] = '\0';
     50 
     51   // Value-initialize (=zero-initialize in this case) a new CommandInfo.
     52   CommandInfo *Info = new (Allocator) CommandInfo();
     53   Info->Name = Name;
     54   Info->ID = NextID++;
     55 
     56   RegisteredCommands.push_back(Info);
     57 
     58   return Info;
     59 }
     60 
     61 const CommandInfo *CommandTraits::registerUnknownCommand(
     62                                                   StringRef CommandName) {
     63   CommandInfo *Info = createCommandInfoWithName(CommandName);
     64   Info->IsUnknownCommand = true;
     65   return Info;
     66 }
     67 
     68 const CommandInfo *CommandTraits::registerBlockCommand(StringRef CommandName) {
     69   CommandInfo *Info = createCommandInfoWithName(CommandName);
     70   Info->IsBlockCommand = true;
     71   return Info;
     72 }
     73 
     74 const CommandInfo *CommandTraits::getBuiltinCommandInfo(
     75                                                   unsigned CommandID) {
     76   if (CommandID < llvm::array_lengthof(Commands))
     77     return &Commands[CommandID];
     78   return NULL;
     79 }
     80 
     81 const CommandInfo *CommandTraits::getRegisteredCommandInfo(
     82                                                   StringRef Name) const {
     83   for (unsigned i = 0, e = RegisteredCommands.size(); i != e; ++i) {
     84     if (RegisteredCommands[i]->Name == Name)
     85       return RegisteredCommands[i];
     86   }
     87   return NULL;
     88 }
     89 
     90 const CommandInfo *CommandTraits::getRegisteredCommandInfo(
     91                                                   unsigned CommandID) const {
     92   return RegisteredCommands[CommandID - llvm::array_lengthof(Commands)];
     93 }
     94 
     95 } // end namespace comments
     96 } // end namespace clang
     97 
     98