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Diffstat (limited to 'contrib/groff/src/include/symbol.h')
-rw-r--r-- | contrib/groff/src/include/symbol.h | 83 |
1 files changed, 83 insertions, 0 deletions
diff --git a/contrib/groff/src/include/symbol.h b/contrib/groff/src/include/symbol.h new file mode 100644 index 000000000000..c3cc8eea63a8 --- /dev/null +++ b/contrib/groff/src/include/symbol.h @@ -0,0 +1,83 @@ +// -*- C++ -*- +/* Copyright (C) 1989, 1990, 1991, 1992, 2002, 2004 + Free Software Foundation, Inc. + Written by James Clark (jjc@jclark.com) + +This file is part of groff. + +groff is free software; you can redistribute it and/or modify it under +the terms of the GNU General Public License as published by the Free +Software Foundation; either version 2, or (at your option) any later +version. + +groff is distributed in the hope that it will be useful, but WITHOUT ANY +WARRANTY; without even the implied warranty of MERCHANTABILITY or +FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License +for more details. + +You should have received a copy of the GNU General Public License along +with groff; see the file COPYING. If not, write to the Free Software +Foundation, 51 Franklin St - Fifth Floor, Boston, MA 02110-1301, USA. */ + +#define DONT_STORE 1 +#define MUST_ALREADY_EXIST 2 + +class symbol { + static const char **table; + static int table_used; + static int table_size; + static char *block; + static int block_size; + const char *s; +public: + symbol(const char *p, int how = 0); + symbol(); + unsigned long hash() const; + int operator ==(symbol) const; + int operator !=(symbol) const; + const char *contents() const; + int is_null() const; + int is_empty() const; +}; + + +extern const symbol NULL_SYMBOL; +extern const symbol EMPTY_SYMBOL; + +inline symbol::symbol() : s(0) +{ +} + +inline int symbol::operator==(symbol p) const +{ + return s == p.s; +} + +inline int symbol::operator!=(symbol p) const +{ + return s != p.s; +} + +inline unsigned long symbol::hash() const +{ + return (unsigned long)s; +} + +inline const char *symbol::contents() const +{ + return s; +} + +inline int symbol::is_null() const +{ + return s == 0; +} + +inline int symbol::is_empty() const +{ + return s != 0 && *s == 0; +} + +symbol concat(symbol, symbol); + +extern symbol default_symbol; |