John Kessenich | 9c86c6a | 2016-05-03 22:49:24 -0600 | [diff] [blame] | 1 | // |
John Kessenich | 927608b | 2017-01-06 12:34:14 -0700 | [diff] [blame] | 2 | // Copyright (C) 2016 Google, Inc. |
John Kessenich | 9c86c6a | 2016-05-03 22:49:24 -0600 | [diff] [blame] | 3 | // |
John Kessenich | 927608b | 2017-01-06 12:34:14 -0700 | [diff] [blame] | 4 | // All rights reserved. |
John Kessenich | 9c86c6a | 2016-05-03 22:49:24 -0600 | [diff] [blame] | 5 | // |
John Kessenich | 927608b | 2017-01-06 12:34:14 -0700 | [diff] [blame] | 6 | // Redistribution and use in source and binary forms, with or without |
| 7 | // modification, are permitted provided that the following conditions |
| 8 | // are met: |
John Kessenich | 9c86c6a | 2016-05-03 22:49:24 -0600 | [diff] [blame] | 9 | // |
| 10 | // Redistributions of source code must retain the above copyright |
| 11 | // notice, this list of conditions and the following disclaimer. |
| 12 | // |
| 13 | // Redistributions in binary form must reproduce the above |
| 14 | // copyright notice, this list of conditions and the following |
| 15 | // disclaimer in the documentation and/or other materials provided |
| 16 | // with the distribution. |
| 17 | // |
| 18 | // Neither the name of Google, Inc., nor the names of its |
| 19 | // contributors may be used to endorse or promote products derived |
| 20 | // from this software without specific prior written permission. |
| 21 | // |
John Kessenich | 927608b | 2017-01-06 12:34:14 -0700 | [diff] [blame] | 22 | // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 23 | // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 24 | // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| 25 | // FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| 26 | // COPYRIGHT HOLDERS OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| 27 | // INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| 28 | // BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| 29 | // LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| 30 | // CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| 31 | // LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN |
| 32 | // ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 33 | // POSSIBILITY OF SUCH DAMAGE. |
John Kessenich | 9c86c6a | 2016-05-03 22:49:24 -0600 | [diff] [blame] | 34 | // |
| 35 | |
| 36 | #ifndef HLSLTOKENSTREAM_H_ |
| 37 | #define HLSLTOKENSTREAM_H_ |
| 38 | |
| 39 | #include "hlslScanContext.h" |
| 40 | |
| 41 | namespace glslang { |
| 42 | |
| 43 | class HlslTokenStream { |
| 44 | public: |
John Kessenich | 34fb036 | 2016-05-03 23:17:20 -0600 | [diff] [blame] | 45 | explicit HlslTokenStream(HlslScanContext& scanner) |
steve-lunarg | 5964c64 | 2016-07-30 07:38:55 -0600 | [diff] [blame] | 46 | : scanner(scanner), preTokenStackSize(0), tokenBufferPos(0) { } |
John Kessenich | 9c86c6a | 2016-05-03 22:49:24 -0600 | [diff] [blame] | 47 | virtual ~HlslTokenStream() { } |
| 48 | |
| 49 | public: |
| 50 | void advanceToken(); |
John Kessenich | 1cc1a28 | 2016-06-03 16:55:49 -0600 | [diff] [blame] | 51 | void recedeToken(); |
John Kessenich | 9c86c6a | 2016-05-03 22:49:24 -0600 | [diff] [blame] | 52 | bool acceptTokenClass(EHlslTokenClass); |
| 53 | EHlslTokenClass peek() const; |
| 54 | bool peekTokenClass(EHlslTokenClass) const; |
John Kessenich | 2dd643f | 2017-03-14 21:50:06 -0600 | [diff] [blame] | 55 | glslang::TBuiltInVariable mapSemantic(const char* upperCase) { return scanner.mapSemantic(upperCase); } |
John Kessenich | 9c86c6a | 2016-05-03 22:49:24 -0600 | [diff] [blame] | 56 | |
John Kessenich | b16f7e6 | 2017-03-11 19:32:47 -0700 | [diff] [blame] | 57 | void pushTokenStream(const TVector<HlslToken>* tokens); |
| 58 | void popTokenStream(); |
| 59 | |
John Kessenich | 9c86c6a | 2016-05-03 22:49:24 -0600 | [diff] [blame] | 60 | protected: |
John Kessenich | 1cc1a28 | 2016-06-03 16:55:49 -0600 | [diff] [blame] | 61 | HlslToken token; // the token we are currently looking at, but have not yet accepted |
| 62 | |
John Kessenich | 9c86c6a | 2016-05-03 22:49:24 -0600 | [diff] [blame] | 63 | private: |
John Kessenich | 7f349c7 | 2016-07-08 22:09:10 -0600 | [diff] [blame] | 64 | HlslTokenStream(); |
| 65 | HlslTokenStream& operator=(const HlslTokenStream&); |
| 66 | |
John Kessenich | b16f7e6 | 2017-03-11 19:32:47 -0700 | [diff] [blame] | 67 | HlslScanContext& scanner; // lexical scanner, to get next token from source file |
| 68 | TVector<const TVector<HlslToken>*> tokenStreamStack; // for getting the next token from an existing vector of tokens |
| 69 | TVector<int> tokenPosition; |
| 70 | TVector<HlslToken> currentTokenStack; |
John Kessenich | 1cc1a28 | 2016-06-03 16:55:49 -0600 | [diff] [blame] | 71 | |
steve-lunarg | 5964c64 | 2016-07-30 07:38:55 -0600 | [diff] [blame] | 72 | // This is the number of tokens we can recedeToken() over. |
| 73 | static const int tokenBufferSize = 2; |
| 74 | |
John Kessenich | 1cc1a28 | 2016-06-03 16:55:49 -0600 | [diff] [blame] | 75 | // Previously scanned tokens, returned for future advances, |
| 76 | // so logically in front of the token stream. |
| 77 | // Is logically a stack; needs last in last out semantics. |
steve-lunarg | 5964c64 | 2016-07-30 07:38:55 -0600 | [diff] [blame] | 78 | // Currently implemented as a stack of size 2. |
| 79 | HlslToken preTokenStack[tokenBufferSize]; |
John Kessenich | 1cc1a28 | 2016-06-03 16:55:49 -0600 | [diff] [blame] | 80 | int preTokenStackSize; |
| 81 | void pushPreToken(const HlslToken&); |
| 82 | HlslToken popPreToken(); |
| 83 | |
steve-lunarg | 5964c64 | 2016-07-30 07:38:55 -0600 | [diff] [blame] | 84 | // Previously scanned tokens, not yet returned for future advances, |
John Kessenich | 1cc1a28 | 2016-06-03 16:55:49 -0600 | [diff] [blame] | 85 | // but available for that. |
| 86 | // Is logically a fifo for normal advances, and a stack for recession. |
steve-lunarg | 5964c64 | 2016-07-30 07:38:55 -0600 | [diff] [blame] | 87 | // Currently implemented with an intrinsic size of 2. |
| 88 | HlslToken tokenBuffer[tokenBufferSize]; |
| 89 | int tokenBufferPos; |
John Kessenich | 1cc1a28 | 2016-06-03 16:55:49 -0600 | [diff] [blame] | 90 | void pushTokenBuffer(const HlslToken&); |
| 91 | HlslToken popTokenBuffer(); |
John Kessenich | 9c86c6a | 2016-05-03 22:49:24 -0600 | [diff] [blame] | 92 | }; |
| 93 | |
| 94 | } // end namespace glslang |
| 95 | |
| 96 | #endif // HLSLTOKENSTREAM_H_ |