1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
|
//===--- CommentCommandTraits.cpp - Comment command properties --*- C++ -*-===//
//
// The LLVM Compiler Infrastructure
//
// This file is distributed under the University of Illinois Open Source
// License. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
#include "clang/AST/CommentCommandTraits.h"
#include "llvm/ADT/STLExtras.h"
namespace clang {
namespace comments {
#include "clang/AST/CommentCommandInfo.inc"
CommandTraits::CommandTraits(llvm::BumpPtrAllocator &Allocator,
const CommentOptions &CommentOptions) :
NextID(llvm::array_lengthof(Commands)), Allocator(Allocator) {
registerCommentOptions(CommentOptions);
}
void CommandTraits::registerCommentOptions(
const CommentOptions &CommentOptions) {
for (CommentOptions::BlockCommandNamesTy::const_iterator
I = CommentOptions.BlockCommandNames.begin(),
E = CommentOptions.BlockCommandNames.end();
I != E; I++) {
registerBlockCommand(*I);
}
}
const CommandInfo *CommandTraits::getCommandInfoOrNULL(StringRef Name) const {
if (const CommandInfo *Info = getBuiltinCommandInfo(Name))
return Info;
return getRegisteredCommandInfo(Name);
}
const CommandInfo *CommandTraits::getCommandInfo(unsigned CommandID) const {
if (const CommandInfo *Info = getBuiltinCommandInfo(CommandID))
return Info;
return getRegisteredCommandInfo(CommandID);
}
static void
HelperTypoCorrectCommandInfo(SmallVectorImpl<const CommandInfo *> &BestCommand,
StringRef Typo, const CommandInfo *Command) {
const unsigned MaxEditDistance = 1;
unsigned BestEditDistance = MaxEditDistance + 1;
StringRef Name = Command->Name;
unsigned MinPossibleEditDistance = abs((int)Name.size() - (int)Typo.size());
if (MinPossibleEditDistance > 0 &&
Typo.size() / MinPossibleEditDistance < 1)
return;
unsigned EditDistance = Typo.edit_distance(Name, true, MaxEditDistance);
if (EditDistance > MaxEditDistance)
return;
if (EditDistance == BestEditDistance)
BestCommand.push_back(Command);
else if (EditDistance < BestEditDistance) {
BestCommand.clear();
BestCommand.push_back(Command);
BestEditDistance = EditDistance;
}
}
const CommandInfo *
CommandTraits::getTypoCorrectCommandInfo(StringRef Typo) const {
// single character command impostures, such as \t or \n must not go
// through the fixit logic.
if (Typo.size() <= 1)
return NULL;
SmallVector<const CommandInfo *, 2> BestCommand;
const int NumOfCommands = llvm::array_lengthof(Commands);
for (int i = 0; i < NumOfCommands; i++)
HelperTypoCorrectCommandInfo(BestCommand, Typo, &Commands[i]);
for (unsigned i = 0, e = RegisteredCommands.size(); i != e; ++i)
if (!RegisteredCommands[i]->IsUnknownCommand)
HelperTypoCorrectCommandInfo(BestCommand, Typo, RegisteredCommands[i]);
return (BestCommand.size() != 1) ? NULL : BestCommand[0];
}
CommandInfo *CommandTraits::createCommandInfoWithName(StringRef CommandName) {
char *Name = Allocator.Allocate<char>(CommandName.size() + 1);
memcpy(Name, CommandName.data(), CommandName.size());
Name[CommandName.size()] = '\0';
// Value-initialize (=zero-initialize in this case) a new CommandInfo.
CommandInfo *Info = new (Allocator) CommandInfo();
Info->Name = Name;
Info->ID = NextID++;
RegisteredCommands.push_back(Info);
return Info;
}
const CommandInfo *CommandTraits::registerUnknownCommand(
StringRef CommandName) {
CommandInfo *Info = createCommandInfoWithName(CommandName);
Info->IsUnknownCommand = true;
return Info;
}
const CommandInfo *CommandTraits::registerBlockCommand(StringRef CommandName) {
CommandInfo *Info = createCommandInfoWithName(CommandName);
Info->IsBlockCommand = true;
return Info;
}
const CommandInfo *CommandTraits::getBuiltinCommandInfo(
unsigned CommandID) {
if (CommandID < llvm::array_lengthof(Commands))
return &Commands[CommandID];
return NULL;
}
const CommandInfo *CommandTraits::getRegisteredCommandInfo(
StringRef Name) const {
for (unsigned i = 0, e = RegisteredCommands.size(); i != e; ++i) {
if (RegisteredCommands[i]->Name == Name)
return RegisteredCommands[i];
}
return NULL;
}
const CommandInfo *CommandTraits::getRegisteredCommandInfo(
unsigned CommandID) const {
return RegisteredCommands[CommandID - llvm::array_lengthof(Commands)];
}
} // end namespace comments
} // end namespace clang
|
