diff options
Diffstat (limited to 'contrib/groff/src/roff/troff/symbol.cpp')
| -rw-r--r-- | contrib/groff/src/roff/troff/symbol.cpp | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/contrib/groff/src/roff/troff/symbol.cpp b/contrib/groff/src/roff/troff/symbol.cpp deleted file mode 100644 index 09f4c98..0000000 --- a/contrib/groff/src/roff/troff/symbol.cpp +++ /dev/null @@ -1,154 +0,0 @@ -// -*- C++ -*- -/* Copyright (C) 1989, 1990, 1991, 1992, 2002 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" - -const char **symbol::table = 0; -int symbol::table_used = 0; -int symbol::table_size = 0; -char *symbol::block = 0; -int symbol::block_size = 0; - -const symbol NULL_SYMBOL; -const symbol EMPTY_SYMBOL(""); - -#ifdef BLOCK_SIZE -#undef BLOCK_SIZE -#endif - -const int BLOCK_SIZE = 1024; -// the table will increase in size as necessary -// the size will be chosen from the following array -// add some more if you want -static const unsigned int table_sizes[] = { - 101, 503, 1009, 2003, 3001, 4001, 5003, 10007, 20011, 40009, 80021, - 160001, 500009, 1000003, 1500007, 2000003, 0 -}; -const double FULL_MAX = 0.3; // don't let the table get more than this full - -static unsigned int hash_string(const char *p) -{ - // compute a hash code; this assumes 32-bit unsigned ints - // see p436 of Compilers by Aho, Sethi & Ullman - // give special treatment to two-character names - unsigned int hc = 0, g; - if (*p != 0) { - hc = *p++; - if (*p != 0) { - hc <<= 7; - hc += *p++; - for (; *p != 0; p++) { - hc <<= 4; - hc += *p; - if ((g = (hc & 0xf0000000)) == 0) { - hc ^= g >> 24; - hc ^= g; - } - } - } - } - return hc; -} - -// Tell compiler that a variable is intentionally unused. -inline void unused(void *) { } - -symbol::symbol(const char *p, int how) -{ - if (p == 0) { - s = 0; - return; - } - if (*p == 0) { - s = ""; - return; - } - if (table == 0) { - table_size = table_sizes[0]; - table = (const char **)new char*[table_size]; - for (int i = 0; i < table_size; i++) - table[i] = 0; - table_used = 0; - } - unsigned int hc = hash_string(p); - const char **pp; - for (pp = table + hc % table_size; - *pp != 0; - (pp == table ? pp = table + table_size - 1 : --pp)) - if (strcmp(p, *pp) == 0) { - s = *pp; - return; - } - if (how == MUST_ALREADY_EXIST) { - s = 0; - return; - } - if (table_used >= table_size - 1 || table_used >= table_size*FULL_MAX) { - const char **old_table = table; - unsigned int old_table_size = table_size; - int i; - for (i = 1; table_sizes[i] <= old_table_size; i++) - if (table_sizes[i] == 0) - fatal("too many symbols"); - table_size = table_sizes[i]; - table_used = 0; - table = (const char **)new char*[table_size]; - for (i = 0; i < table_size; i++) - table[i] = 0; - for (pp = old_table + old_table_size - 1; - pp >= old_table; - --pp) { - symbol temp(*pp, 1); /* insert it into the new table */ - unused(&temp); - } - a_delete old_table; - for (pp = table + hc % table_size; - *pp != 0; - (pp == table ? pp = table + table_size - 1 : --pp)) - ; - } - ++table_used; - if (how == DONT_STORE) { - s = *pp = p; - } - else { - int len = strlen(p)+1; - if (block == 0 || block_size < len) { - block_size = len > BLOCK_SIZE ? len : BLOCK_SIZE; - block = new char [block_size]; - } - (void)strcpy(block, p); - s = *pp = block; - block += len; - block_size -= len; - } -} - -symbol concat(symbol s1, symbol s2) -{ - char *buf = new char [strlen(s1.contents()) + strlen(s2.contents()) + 1]; - strcpy(buf, s1.contents()); - strcat(buf, s2.contents()); - symbol res(buf); - a_delete buf; - return res; -} |
