projects / dragonfly.git / blame
| Commit | Line | Data |
|---|---|---|
| 92d0a6a6 | 1 | // -*- C++ -*- |
| 4d3e9548 | 2 | /* Copyright (C) 1989, 1990, 1991, 1992, 2002, 2004, 2009 |
| 92d0a6a6 JR |
3 | Free Software Foundation, Inc. |
| 4 | Written by James Clark (jjc@jclark.com) | |
| 5 | ||
| 6 | This file is part of groff. | |
| 7 | ||
| 8 | groff is free software; you can redistribute it and/or modify it under | |
| 9 | the terms of the GNU General Public License as published by the Free | |
| 4d3e9548 JL |
10 | Software Foundation, either version 3 of the License, or |
| 11 | (at your option) any later version. | |
| 92d0a6a6 JR |
12 | |
| 13 | groff is distributed in the hope that it will be useful, but WITHOUT ANY | |
| 14 | WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 | FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License | |
| 16 | for more details. | |
| 17 | ||
| 4d3e9548 JL |
18 | You should have received a copy of the GNU General Public License |
| 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ | |
| 92d0a6a6 JR |
20 | |
| 21 | #define DONT_STORE 1 | |
| 22 | #define MUST_ALREADY_EXIST 2 | |
| 23 | ||
| 24 | class symbol { | |
| 25 | static const char **table; | |
| 26 | static int table_used; | |
| 27 | static int table_size; | |
| 28 | static char *block; | |
| 29 | static int block_size; | |
| 30 | const char *s; | |
| 31 | public: | |
| 32 | symbol(const char *p, int how = 0); | |
| 33 | symbol(); | |
| 34 | unsigned long hash() const; | |
| 35 | int operator ==(symbol) const; | |
| 36 | int operator !=(symbol) const; | |
| 37 | const char *contents() const; | |
| 38 | int is_null() const; | |
| 39 | int is_empty() const; | |
| 40 | }; | |
| 41 | ||
| 42 | ||
| 43 | extern const symbol NULL_SYMBOL; | |
| 44 | extern const symbol EMPTY_SYMBOL; | |
| 45 | ||
| 46 | inline symbol::symbol() : s(0) | |
| 47 | { | |
| 48 | } | |
| 49 | ||
| 50 | inline int symbol::operator==(symbol p) const | |
| 51 | { | |
| 52 | return s == p.s; | |
| 53 | } | |
| 54 | ||
| 55 | inline int symbol::operator!=(symbol p) const | |
| 56 | { | |
| 57 | return s != p.s; | |
| 58 | } | |
| 59 | ||
| 60 | inline unsigned long symbol::hash() const | |
| 61 | { | |
| 62 | return (unsigned long)s; | |
| 63 | } | |
| 64 | ||
| 65 | inline const char *symbol::contents() const | |
| 66 | { | |
| 67 | return s; | |
| 68 | } | |
| 69 | ||
| 70 | inline int symbol::is_null() const | |
| 71 | { | |
| 72 | return s == 0; | |
| 73 | } | |
| 74 | ||
| 75 | inline int symbol::is_empty() const | |
| 76 | { | |
| 77 | return s != 0 && *s == 0; | |
| 78 | } | |
| 79 | ||
| 80 | symbol concat(symbol, symbol); | |
| 81 | ||
| 82 | extern symbol default_symbol; |