comparison: src/lexer_scanner.h
src/lexer_scanner.h
- changeset 73
- 1ee9b312dc18
- child 74
- 007fbadfa7f9
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| 72:03e4d9db3fd9 | 73:1ee9b312dc18 |
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| 1 /* | |
| 2 Copyright (c) 2013-2014, 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 are met: | |
| 7 | |
| 8 * Redistributions of source code must retain the above copyright | |
| 9 notice, this list of conditions and the following disclaimer. | |
| 10 | |
| 11 * 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 | |
| 15 * Neither the name of the <organization> nor the | |
| 16 names of its contributors may be used to endorse or promote products | |
| 17 derived from this software without specific prior written permission. | |
| 18 | |
| 19 THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND | |
| 20 ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED | |
| 21 WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE | |
| 22 DISCLAIMED. IN NO EVENT SHALL <COPYRIGHT HOLDER> BE LIABLE FOR ANY | |
| 23 DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES | |
| 24 (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; | |
| 25 LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND | |
| 26 ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
| 27 (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS | |
| 28 SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
| 29 */ | |
| 30 | |
| 31 #ifndef IRIS_SCANNER_H | |
| 32 #define IRIS_SCANNER_H | |
| 33 | |
| 34 #include <climits> | |
| 35 #include "main.h" | |
| 36 | |
| 37 class lexer_scanner | |
| 38 { | |
| 39 types: | |
| 40 struct position_info | |
| 41 { | |
| 42 char* pos; | |
| 43 char* line_break_pos; | |
| 44 int line; | |
| 45 }; | |
| 46 | |
| 47 // Flags for check_string() | |
| 48 enum | |
| 49 { | |
| 50 f_check_word = (1 << 0), // must be followed by whitespace | |
| 51 f_check_peek = (1 << 1), // don't advance cursor | |
| 52 }; | |
| 53 | |
| 54 public: | |
| 55 static inline bool is_symbol_char (char c) | |
| 56 { | |
| 57 return (c >= 'a' && c <= 'z') || | |
| 58 (c >= 'A' && c <= 'Z') || | |
| 59 (c == '_'); | |
| 60 } | |
| 61 | |
| 62 lexer_scanner (FILE* fp); | |
| 63 ~lexer_scanner(); | |
| 64 bool get_next_token(); | |
| 65 | |
| 66 inline const string& get_token_text() const | |
| 67 { | |
| 68 return m_token_text; | |
| 69 } | |
| 70 | |
| 71 inline int get_line() const | |
| 72 { | |
| 73 return m_line; | |
| 74 } | |
| 75 | |
| 76 inline int get_column() const | |
| 77 { | |
| 78 return m_ptr - m_line_break_pos; | |
| 79 } | |
| 80 | |
| 81 inline e_token get_e_token() const | |
| 82 { | |
| 83 return m_e_token; | |
| 84 } | |
| 85 | |
| 86 static string get_token_string (e_token a); | |
| 87 | |
| 88 private: | |
| 89 char* m_data, | |
| 90 * m_ptr, | |
| 91 * m_line_break_pos; | |
| 92 string m_token_text, | |
| 93 m_last_token; | |
| 94 e_token m_e_token; | |
| 95 int m_line; | |
| 96 | |
| 97 bool check_string (const char* c, int flags = 0); | |
| 98 | |
| 99 // Yields a copy of the current position information. | |
| 100 position_info get_position() const; | |
| 101 | |
| 102 // Sets the current position based on given data. | |
| 103 void set_position (const position_info& a); | |
| 104 }; | |
| 105 | |
| 106 #endif // IRIS_SCANNER_H | |
| 107 |
