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/* Copyright (C) 1989, 1990, 1991, 1992, 2000 Free Software Foundation, Inc.
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Written by James Clark (jjc@jclark.com)
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This file is part of groff.
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groff is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free
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Software Foundation; either version 2, or (at your option) any later
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groff is distributed in the hope that it will be useful, but WITHOUT ANY
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WARRANTY; without even the implied warranty of MERCHANTABILITY or
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FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
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You should have received a copy of the GNU General Public License along
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with groff; see the file COPYING. If not, write to the Free Software
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Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
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class character_indexer {
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int ascii_char_index(unsigned char);
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int named_char_index(const char *);
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int numbered_char_index(int);
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enum { NSMALL = 256 };
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int small_number_index[NSMALL];
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int lookup_char(const char *, int);
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character_indexer::character_indexer()
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for (i = 0; i < 256; i++)
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for (i = 0; i < NSMALL; i++)
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small_number_index[i] = -1;
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character_indexer::~character_indexer()
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int character_indexer::ascii_char_index(unsigned char c)
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if (ascii_index[c] < 0)
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ascii_index[c] = next_index++;
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return ascii_index[c];
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int character_indexer::numbered_char_index(int n)
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if (n >= 0 && n < NSMALL) {
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if (small_number_index[n] < 0)
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small_number_index[n] = next_index++;
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return small_number_index[n];
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// Not the most efficient possible implementation.
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char buf[INT_DIGITS + 3];
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strcpy(buf + 1, i_to_a(n));
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return named_char_index(buf);
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int character_indexer::named_char_index(const char *s)
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int *np = table.lookup(s);
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static character_indexer indexer;
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int font::number_to_index(int n)
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return indexer.numbered_char_index(n);
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int font::name_to_index(const char *s)
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assert(s != 0 && s[0] != '\0' && s[0] != ' ');
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return indexer.ascii_char_index(s[0]);
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/* char128 and \200 are synonyms */
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if (s[0] == 'c' && s[1] == 'h' && s[2] == 'a' && s[3] == 'r') {
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long n = strtol(s + 4, &res, 10);
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if (res != s + 4 && *res == '\0' && n >= 0 && n < 256)
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return indexer.ascii_char_index((unsigned char)n);
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return indexer.named_char_index(s);