1// Copyright 2016 The SwiftShader Authors. All Rights Reserved.
2//
3// Licensed under the Apache License, Version 2.0 (the "License");
4// you may not use this file except in compliance with the License.
5// You may obtain a copy of the License at
6//
7// http://www.apache.org/licenses/LICENSE-2.0
8//
9// Unless required by applicable law or agreed to in writing, software
10// distributed under the License is distributed on an "AS IS" BASIS,
11// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
12// See the License for the specific language governing permissions and
13// limitations under the License.
14
15#ifndef COMPILER_PREPROCESSOR_TOKENIZER_H_
16#define COMPILER_PREPROCESSOR_TOKENIZER_H_
17
18#include "Input.h"
19#include "Lexer.h"
20#include "pp_utils.h"
21
22namespace pp
23{
24
25class Diagnostics;
26
27class Tokenizer : public Lexer
28{
29public:
30 struct Context
31 {
32 Diagnostics *diagnostics;
33
34 Input input;
35 // The location where yytext points to. Token location should track
36 // scanLoc instead of Input::mReadLoc because they may not be the same
37 // if text is buffered up in the scanner input buffer.
38 Input::Location scanLoc;
39
40 bool leadingSpace;
41 bool lineStart;
42 };
43
44 Tokenizer(Diagnostics *diagnostics);
45 ~Tokenizer() override;
46
47 bool init(size_t count, const char *const string[], const int length[]);
48
49 void setFileNumber(int file);
50 void setLineNumber(int line);
51 void setMaxTokenSize(size_t maxTokenSize);
52
53 void lex(Token *token) override;
54
55private:
56 PP_DISALLOW_COPY_AND_ASSIGN(Tokenizer);
57 bool initScanner();
58 void destroyScanner();
59
60 void *mHandle; // Scanner handle.
61 Context mContext; // Scanner extra.
62 size_t mMaxTokenSize; // Maximum token size
63};
64
65} // namespace pp
66#endif // COMPILER_PREPROCESSOR_TOKENIZER_H_
67
68