comparison: src/LexerScanner.h
src/LexerScanner.h
- changeset 119
- bdf8d46c145f
- parent 118
- e3361cf7cbf4
- child 120
- 5ea0faefa82a
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| 118:e3361cf7cbf4 | 119:bdf8d46c145f |
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| 1 /* | |
| 2 Copyright 2012-2014 Santeri Piippo | |
| 3 All rights reserved. | |
| 4 | |
| 5 Redistribution and use in source and binary forms, with or without | |
| 6 modification, are permitted provided that the following conditions | |
| 7 are met: | |
| 8 | |
| 9 1. Redistributions of source code must retain the above copyright | |
| 10 notice, this list of conditions and the following disclaimer. | |
| 11 2. Redistributions in binary form must reproduce the above copyright | |
| 12 notice, this list of conditions and the following disclaimer in the | |
| 13 documentation and/or other materials provided with the distribution. | |
| 14 3. The name of the author may not be used to endorse or promote products | |
| 15 derived from this software without specific prior written permission. | |
| 16 | |
| 17 THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR | |
| 18 IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES | |
| 19 OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. | |
| 20 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, | |
| 21 INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT | |
| 22 NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
| 23 DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
| 24 THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 25 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF | |
| 26 THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 27 */ | |
| 28 | |
| 29 #ifndef BOTC_LEXER_SCANNER_H | |
| 30 #define BOTC_LEXER_SCANNER_H | |
| 31 | |
| 32 #include <climits> | |
| 33 #include "Main.h" | |
| 34 | |
| 35 class LexerScanner | |
| 36 { | |
| 37 public: | |
| 38 struct PositionInfo | |
| 39 { | |
| 40 char* pos; | |
| 41 int line; | |
| 42 }; | |
| 43 | |
| 44 // Flags for check_string() | |
| 45 enum | |
| 46 { | |
| 47 FCheckWord = (1 << 0), // must be followed by whitespace | |
| 48 FCheckPeek = (1 << 1), // don't advance cursor | |
| 49 }; | |
| 50 | |
| 51 static inline bool isSymbolChar (char c, bool allownumbers) | |
| 52 { | |
| 53 if (allownumbers && (c >= '0' && c <= '9')) | |
| 54 return true; | |
| 55 | |
| 56 return (c >= 'a' && c <= 'z') || | |
| 57 (c >= 'A' && c <= 'Z') || | |
| 58 (c == '_'); | |
| 59 } | |
| 60 | |
| 61 LexerScanner (FILE* fp); | |
| 62 ~LexerScanner(); | |
| 63 bool getNextToken(); | |
| 64 String readLine(); | |
| 65 | |
| 66 inline const String& getTokenText() const | |
| 67 { | |
| 68 return m_tokenText; | |
| 69 } | |
| 70 | |
| 71 inline int getLine() const | |
| 72 { | |
| 73 return m_line; | |
| 74 } | |
| 75 | |
| 76 inline int getColumn() const | |
| 77 { | |
| 78 return m_position - m_lineBreakPosition; | |
| 79 } | |
| 80 | |
| 81 inline ETokenType getTokenType() const | |
| 82 { | |
| 83 return m_tokenType; | |
| 84 } | |
| 85 | |
| 86 static String getTokenString (ETokenType a); | |
| 87 | |
| 88 private: | |
| 89 char* m_data; | |
| 90 char* m_position; | |
| 91 char* m_lineBreakPosition; | |
| 92 String m_tokenText, | |
| 93 m_lastToken; | |
| 94 ETokenType m_tokenType; | |
| 95 int m_line; | |
| 96 | |
| 97 bool checkString (const char* c, int flags = 0); | |
| 98 | |
| 99 // Yields a copy of the current position information. | |
| 100 PositionInfo getPosition() const; | |
| 101 | |
| 102 // Sets the current position based on given data. | |
| 103 void setPosition (const PositionInfo& a); | |
| 104 | |
| 105 // Skips one character | |
| 106 void skip(); | |
| 107 | |
| 108 // Skips many characters | |
| 109 void skip (int chars); | |
| 110 }; | |
| 111 | |
| 112 #endif // BOTC_LEXER_SCANNER_H |
