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authorru <ru@FreeBSD.org>2003-05-01 13:15:22 +0000
committerru <ru@FreeBSD.org>2003-05-01 13:15:22 +0000
commitbfbdfe00b3a7278899603d226f338d4bd1c1339a (patch)
tree3d9f3e5e587c8f761c8593c226f57460f1b1cd32 /contrib/groff/src/roff/troff/dictionary.cc
parentafe720d86864aed2532a11aa8d43096f324e4f23 (diff)
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This commit was generated by cvs2svn to compensate for changes in r114405,
which included commits to RCS files with non-trunk default branches.
Diffstat (limited to 'contrib/groff/src/roff/troff/dictionary.cc')
-rw-r--r--contrib/groff/src/roff/troff/dictionary.cc212
1 files changed, 0 insertions, 212 deletions
diff --git a/contrib/groff/src/roff/troff/dictionary.cc b/contrib/groff/src/roff/troff/dictionary.cc
deleted file mode 100644
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--- a/contrib/groff/src/roff/troff/dictionary.cc
+++ /dev/null
@@ -1,212 +0,0 @@
-// -*- C++ -*-
-/* Copyright (C) 1989, 1990, 1991, 1992, 2001 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, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-
-
-#include "troff.h"
-#include "symbol.h"
-#include "dictionary.h"
-
-// is `p' a good size for a hash table
-
-static int is_good_size(unsigned int p)
-{
- const unsigned int SMALL = 10;
- unsigned int i;
- for (i = 2; i <= p/2; i++)
- if (p % i == 0)
- return 0;
- for (i = 0x100; i != 0; i <<= 8)
- if (i % p <= SMALL || i % p > p - SMALL)
- return 0;
- return 1;
-}
-
-dictionary::dictionary(int n) : size(n), used(0), threshold(0.5), factor(1.5)
-{
- table = new association[n];
-}
-
-// see Knuth, Sorting and Searching, p518, Algorithm L
-// we can't use double-hashing because we want a remove function
-
-void *dictionary::lookup(symbol s, void *v)
-{
- int i;
- for (i = int(s.hash() % size);
- table[i].v != 0;
- i == 0 ? i = size - 1: --i)
- if (s == table[i].s) {
- if (v != 0) {
- void *temp = table[i].v;
- table[i].v = v;
- return temp;
- }
- else
- return table[i].v;
- }
- if (v == 0)
- return 0;
- ++used;
- table[i].v = v;
- table[i].s = s;
- if ((double)used/(double)size >= threshold || used + 1 >= size) {
- int old_size = size;
- size = int(size*factor);
- while (!is_good_size(size))
- ++size;
- association *old_table = table;
- table = new association[size];
- used = 0;
- for (i = 0; i < old_size; i++)
- if (old_table[i].v != 0)
- (void)lookup(old_table[i].s, old_table[i].v);
- a_delete old_table;
- }
- return 0;
-}
-
-void *dictionary::lookup(const char *p)
-{
- symbol s(p, MUST_ALREADY_EXIST);
- if (s.is_null())
- return 0;
- else
- return lookup(s);
-}
-
-// see Knuth, Sorting and Searching, p527, Algorithm R
-
-void *dictionary::remove(symbol s)
-{
- // this relies on the fact that we are using linear probing
- int i;
- for (i = int(s.hash() % size);
- table[i].v != 0 && s != table[i].s;
- i == 0 ? i = size - 1: --i)
- ;
- void *p = table[i].v;
- while (table[i].v != 0) {
- table[i].v = 0;
- int j = i;
- int r;
- do {
- --i;
- if (i < 0)
- i = size - 1;
- if (table[i].v == 0)
- break;
- r = int(table[i].s.hash() % size);
- } while ((i <= r && r < j) || (r < j && j < i) || (j < i && i <= r));
- table[j] = table[i];
- }
- if (p != 0)
- --used;
- return p;
-}
-
-dictionary_iterator::dictionary_iterator(dictionary &d) : dict(&d), i(0)
-{
-}
-
-int dictionary_iterator::get(symbol *sp, void **vp)
-{
- for (; i < dict->size; i++)
- if (dict->table[i].v) {
- *sp = dict->table[i].s;
- *vp = dict->table[i].v;
- i++;
- return 1;
- }
- return 0;
-}
-
-object_dictionary_iterator::object_dictionary_iterator(object_dictionary &od)
-: di(od.d)
-{
-}
-
-object::object() : rcount(0)
-{
-}
-
-object::~object()
-{
-}
-
-void object::add_reference()
-{
- rcount += 1;
-}
-
-void object::remove_reference()
-{
- if (--rcount == 0)
- delete this;
-}
-
-object_dictionary::object_dictionary(int n) : d(n)
-{
-}
-
-object *object_dictionary::lookup(symbol nm)
-{
- return (object *)d.lookup(nm);
-}
-
-void object_dictionary::define(symbol nm, object *obj)
-{
- obj->add_reference();
- obj = (object *)d.lookup(nm, obj);
- if (obj)
- obj->remove_reference();
-}
-
-void object_dictionary::rename(symbol oldnm, symbol newnm)
-{
- object *obj = (object *)d.remove(oldnm);
- if (obj) {
- obj = (object *)d.lookup(newnm, obj);
- if (obj)
- obj->remove_reference();
- }
-}
-
-void object_dictionary::remove(symbol nm)
-{
- object *obj = (object *)d.remove(nm);
- if (obj)
- obj->remove_reference();
-}
-
-// Return non-zero if oldnm was defined.
-
-int object_dictionary::alias(symbol newnm, symbol oldnm)
-{
- object *obj = (object *)d.lookup(oldnm);
- if (obj) {
- obj->add_reference();
- obj = (object *)d.lookup(newnm, obj);
- if (obj)
- obj->remove_reference();
- return 1;
- }
- return 0;
-}
-
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