diff options
Diffstat (limited to 'src/hash-table.h')
| -rw-r--r-- | src/hash-table.h | 69 |
1 files changed, 46 insertions, 23 deletions
diff --git a/src/hash-table.h b/src/hash-table.h index 86438d00f7d6..d6938eb4d1f0 100644 --- a/src/hash-table.h +++ b/src/hash-table.h @@ -2,42 +2,65 @@ /* Hash table used to check for duplicate keyword entries. - Copyright (C) 1989-1998, 2000 Free Software Foundation, Inc. - written by Douglas C. Schmidt (schmidt@ics.uci.edu) + Copyright (C) 1989-1998, 2000, 2002 Free Software Foundation, Inc. + Written by Douglas C. Schmidt <schmidt@ics.uci.edu> + and Bruno Haible <bruno@clisp.org>. -This file is part of GNU GPERF. + This file is part of GNU GPERF. -GNU GPERF 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 1, or (at your option) -any later version. + GNU GPERF 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. -GNU GPERF 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. + GNU GPERF 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 GNU GPERF; see the file COPYING. If not, write to the Free -Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111, USA. */ + You should have received a copy of the GNU General Public License + along with this program; see the file COPYING. + If not, write to the Free Software Foundation, Inc., + 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */ #ifndef hash_table_h #define hash_table_h 1 -#include "list-node.h" +#include "keyword.h" + +/* Hash table of KeywordExt* entries. + Two entries are considered equal if their _selchars are the same and + - if !ignore_length - if their _allchars_length are the same. */ class Hash_Table { +public: + /* Constructor. + size is the maximum number of entries. + ignore_length determines a detail in the comparison function. */ + Hash_Table (unsigned int size, bool ignore_length); + /* Destructor. */ + ~Hash_Table (); + /* Attempts to insert ITEM in the table. If there is already an equal + entry in it, returns it. Otherwise inserts ITEM and returns NULL. */ + KeywordExt * insert (KeywordExt *item); + /* Print the table's contents. */ + void dump () const; + private: - List_Node **table; /* Vector of pointers to linked lists of List_Node's. */ - int size; /* Size of the vector. */ - int collisions; /* Find out how well our double hashing is working! */ - int ignore_length; + /* Vector of entries. */ + KeywordExt ** _table; + /* Size of the vector. */ + unsigned int _size; + /* log2(_size). */ + unsigned int _log_size; + /* A detail of the comparison function. */ + bool const _ignore_length; + /* Statistics: Number of collisions so far. */ + unsigned int _collisions; -public: - Hash_Table (List_Node **t, int s, int ignore_len); - ~Hash_Table (void); - List_Node *insert (List_Node *item); + /* Compares two items. */ + bool equal (KeywordExt *item1, KeywordExt *item2) const; }; #endif |