[1076] | 1 | /**********************************************************************
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| 2 | *
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| 3 | * text_t.cpp -- a simple 16-bit character string class
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| 4 | * Copyright (C) 1999 The New Zealand Digital Library Project
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| 5 | *
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| 6 | * A component of the Greenstone digital library software
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| 7 | * from the New Zealand Digital Library Project at the
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| 8 | * University of Waikato, New Zealand.
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| 9 | *
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| 10 | * This program is free software; you can redistribute it and/or modify
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| 11 | * it under the terms of the GNU General Public License as published by
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| 12 | * the Free Software Foundation; either version 2 of the License, or
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| 13 | * (at your option) any later version.
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| 14 | *
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| 15 | * This program is distributed in the hope that it will be useful,
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| 16 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 17 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 18 | * GNU General Public License for more details.
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| 19 | *
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| 20 | * You should have received a copy of the GNU General Public License
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| 21 | * along with this program; if not, write to the Free Software
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| 22 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 23 | *
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[1860] | 24 | * $Id: text_t.cpp 1860 2001-01-25 18:26:45Z cs025 $
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| 25 | *
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[1076] | 26 | *********************************************************************/
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| 27 |
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[1860] | 28 | /*
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| 29 | $Log$
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| 30 | Revision 1.20 2001/01/25 18:26:44 cs025
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| 31 | Included CORBA branch for first time
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| 32 |
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| 33 | Revision 1.15.2.2 2000/04/05 10:19:38 syeates
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| 34 | added automatic conversion to allow text_t's to be <<'ed to ostreams
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| 35 |
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| 36 | Revision 1.15.2.1 2000/04/04 15:02:29 cs025
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| 37 | Corba first commit
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| 38 |
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| 39 | Revision 1.15 1999/10/14 22:52:39 sjboddie
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| 40 | joinchar can join using text_t string now too
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| 41 |
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| 42 | Revision 1.14 1999/09/24 02:30:03 rjmcnab
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| 43 | added function has_unicode_letdig
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| 44 |
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| 45 | Revision 1.13 1999/09/07 04:57:43 sjboddie
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| 46 | added gpl notice
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| 47 |
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| 48 | Revision 1.12 1999/08/31 08:04:41 rjmcnab
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| 49 | Fixed a small but hard to find bug in getcarr
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| 50 |
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| 51 | Revision 1.11 1999/07/01 04:05:09 rjmcnab
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| 52 | Optimised append functions slightly and added a reserve function.
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| 53 |
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| 54 | Revision 1.10 1999/04/26 03:58:03 sjboddie
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| 55 | added is_number function
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| 56 |
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| 57 | Revision 1.9 1999/04/06 22:17:24 rjmcnab
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| 58 | Added splits and joins using text_tset.
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| 59 |
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| 60 | Revision 1.8 1999/02/28 23:14:41 rjmcnab
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| 61 |
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| 62 | Added uc and lc to convert to uppercase and lowercase.
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| 63 |
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| 64 | Revision 1.7 1999/02/21 22:26:39 rjmcnab
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| 65 |
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| 66 | Made getint() a constant function.
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| 67 |
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| 68 | Revision 1.6 1999/02/03 01:13:26 sjboddie
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| 69 |
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| 70 | Got interface to handle subcollections and language subcollections -
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| 71 | committed changes made to some of the collections
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| 72 |
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| 73 | Revision 1.5 1999/01/19 01:38:14 rjmcnab
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| 74 |
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| 75 | Made the source more portable.
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| 76 |
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| 77 | Revision 1.4 1999/01/12 01:51:00 rjmcnab
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| 78 |
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| 79 | Standard header.
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| 80 |
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| 81 | Revision 1.3 1999/01/08 02:33:16 rjmcnab
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| 82 |
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| 83 | Added standard header to source files.
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| 84 |
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| 85 | */
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| 86 |
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[1076] | 87 | #include "text_t.h"
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| 88 |
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| 89 | #if defined(GSDL_USE_OBJECTSPACE)
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| 90 | # include <ospace\std\algorithm>
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| 91 | #elif defined(GSDL_USE_STL_H)
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| 92 | # if defined(GSDL_USE_ALGO_H)
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| 93 | # include <algo.h>
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| 94 | # else
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| 95 | # include <algorithm.h>
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| 96 | # endif
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| 97 | #else
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| 98 | # include <algorithm>
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| 99 | #endif
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| 100 |
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[1860] | 101 | #ifdef HAVE_CONFIG_H
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| 102 | # ifdef __WIN32__
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| 103 | # include "WIN32cfg.h"
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| 104 | # else
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| 105 | # include "config.h"
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| 106 | # endif
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| 107 | #endif
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[1076] | 108 |
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[1860] | 109 |
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[1076] | 110 | #include "unitool.h"
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| 111 |
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| 112 | ////////////////////////////////////
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| 113 | // text_t methods
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| 114 | ////////////////////////////////////
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| 115 |
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[1860] | 116 | // new stream converter ...
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| 117 | ostream& operator<< (ostream &o, const text_t text)
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| 118 | {
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| 119 | text_t::const_iterator ithere = text.begin();
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| 120 | text_t::const_iterator itend = text.end();
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| 121 |
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| 122 | while (ithere != itend)
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| 123 | {
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| 124 | if (*ithere < 256)
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| 125 | {
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| 126 | o << (unsigned char)(*ithere);
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| 127 | }
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| 128 | else
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| 129 | {
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| 130 | // put a space or a question mark depending on what
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| 131 | // the character is. Question marks tell the user that
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| 132 | // they are missing some information.
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| 133 | if (is_unicode_space (*ithere))
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| 134 | o << ' ';
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| 135 | else
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| 136 | o << '?';
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| 137 | }
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| 138 | ithere++;
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| 139 | }
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| 140 |
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| 141 | return o;
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| 142 | }
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| 143 |
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[1076] | 144 | text_t::text_t ()
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| 145 | {
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| 146 | setencoding(0);
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| 147 | clear ();
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| 148 | }
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| 149 |
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| 150 | text_t::text_t (int i)
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| 151 | {
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| 152 | setencoding(0);
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| 153 | clear ();
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| 154 | appendint (i);
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| 155 | }
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| 156 |
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| 157 | text_t::text_t (char *s)
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| 158 | {
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| 159 | setencoding(0);
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| 160 | clear ();
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| 161 | appendcstr (s);
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| 162 | }
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| 163 |
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[1860] | 164 |
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[1076] | 165 | void text_t::append (const text_t &t)
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| 166 | {
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| 167 | text.insert(text.end(), t.begin(), t.end());
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| 168 | // const_iterator here, end=t.end();
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| 169 | // for (here=t.begin(); here!=end;here++)
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| 170 | // {
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| 171 | // text.push_back(*here);
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| 172 | // }
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| 173 | }
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| 174 |
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| 175 | void text_t::appendrange (iterator first, iterator last)
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| 176 | {
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| 177 | text.insert(text.end(), first, last);
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| 178 | // while (first != last)
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| 179 | // {
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| 180 | // text.push_back (*first);
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| 181 | // first++;
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| 182 | // }
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| 183 | }
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| 184 |
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| 185 | void text_t::appendrange (const_iterator first, const_iterator last)
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| 186 | {
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| 187 | text.insert(text.end(), first, last);
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| 188 | // while (first != last)
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| 189 | // {
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| 190 | // text.push_back (*first);
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| 191 | // first++;
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| 192 | // }
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| 193 | }
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| 194 |
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| 195 | void text_t::appendint (int i)
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| 196 | {
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| 197 | // deal with zeros and negatives
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| 198 | if (i == 0)
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| 199 | {
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| 200 | text.push_back('0');
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| 201 | return;
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| 202 | }
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| 203 | else if (i < 0)
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| 204 | {
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| 205 | text.push_back('-');
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| 206 | i *= -1;
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| 207 | }
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| 208 |
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| 209 | // get a buffer for the conversion
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| 210 | int maxbuflen = sizeof(int)*3;
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| 211 | char *buf = new char[maxbuflen];
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| 212 | int len = 0;
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| 213 |
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| 214 | // get the number in reverse
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| 215 | while (i > 0)
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| 216 | {
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| 217 | buf[len++] = '0'+ (i%10);
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| 218 | i = i/10;
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| 219 | }
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| 220 |
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| 221 | // reverse the number
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| 222 | while (len > 0)
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| 223 | {
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| 224 | text.push_back(buf[--len]);
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| 225 | }
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| 226 |
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| 227 | delete buf;
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| 228 | }
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| 229 |
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| 230 | int text_t::getint () const
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| 231 | {
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| 232 | int i = 0;
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| 233 | int mult = 1; // become -1 for negative numbers
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| 234 |
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| 235 | const_iterator here = text.begin();
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| 236 | const_iterator end = text.end();
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| 237 |
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| 238 | // do plus and minus signs
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| 239 | if (here != end)
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| 240 | {
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| 241 | if (*here == '-')
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| 242 | {
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| 243 | mult = -1;
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| 244 | here++;
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| 245 | }
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| 246 | else if (*here == '+')
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| 247 | {
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| 248 | mult = 1;
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| 249 | here++;
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| 250 | }
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| 251 | }
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| 252 |
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| 253 | // deal with the number
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| 254 | while ((here != end) && (*here >= '0') && (*here <= '9'))
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| 255 | {
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| 256 | i = 10*i + (*here - '0');
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| 257 | here++;
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| 258 | }
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| 259 |
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| 260 | i *= mult;
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| 261 | return i;
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| 262 | }
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| 263 |
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| 264 |
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| 265 |
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| 266 | void text_t::appendcarr (char *s, size_type len)
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| 267 | {
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| 268 | unsigned char *us = (unsigned char *)s;
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| 269 | while (len > 0)
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| 270 | {
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| 271 | text.push_back (*us); // append this character
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| 272 | us++;
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| 273 | len--;
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| 274 | }
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| 275 | }
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| 276 |
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| 277 | void text_t::appendcstr (char *s)
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| 278 | {
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| 279 | unsigned char *us = (unsigned char *)s;
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| 280 | while (*us != '\0')
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| 281 | {
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| 282 | text.push_back (*us); // append this character
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| 283 | us++;
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| 284 | }
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| 285 | }
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| 286 |
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| 287 |
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| 288 | // strings returned from getcarr and getcstr become the callers
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| 289 | // responsibility and should be deallocated with "delete"
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| 290 |
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| 291 | char *text_t::getcarr(size_type &len) const
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| 292 | {
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| 293 | unsigned char *cstr = new unsigned char[size()];
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| 294 | len = 0;
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| 295 |
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| 296 | const_iterator ithere = begin();
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| 297 | const_iterator itend = end();
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| 298 | while (ithere != itend)
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| 299 | {
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| 300 | if (*ithere < 256) cstr[len] = (unsigned char)(*ithere);
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| 301 | else {
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| 302 | // put a space or a question mark depending on what
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| 303 | // the character is. Question marks tell the user that
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| 304 | // they are missing some information.
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| 305 | if (is_unicode_space (*ithere)) cstr[len] = ' ';
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| 306 | else cstr[len] = '?';
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| 307 | }
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| 308 | len++;
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| 309 | ithere++;
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| 310 | }
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| 311 |
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| 312 | return (char *)cstr;
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| 313 | }
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| 314 |
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| 315 | char *text_t::getcstr() const
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| 316 | {
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| 317 | unsigned char *cstr = new unsigned char[size() + 1];
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| 318 | const_iterator ithere = begin();
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| 319 | const_iterator itend = end();
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| 320 | int len = 0;
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| 321 |
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| 322 | while (ithere != itend)
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| 323 | {
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| 324 | if (*ithere < 256) cstr[len] = (unsigned char)(*ithere);
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| 325 | else {
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| 326 | // put a space or a question mark depending on what
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| 327 | // the character is. Question marks tell the user that
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| 328 | // they are missing some information.
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| 329 | if (is_unicode_space (*ithere)) cstr[len] = ' ';
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| 330 | else cstr[len] = '?';
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| 331 | }
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| 332 | len++;
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| 333 | ithere++;
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| 334 | }
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| 335 |
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| 336 | cstr[len] = '\0';
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| 337 |
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| 338 | return (char *)cstr;
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| 339 | }
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| 340 |
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| 341 |
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| 342 | // general functions which work on text_ts
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| 343 |
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| 344 | // find a character within a range
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| 345 | text_t::const_iterator findchar (text_t::const_iterator first, text_t::const_iterator last,
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| 346 | unsigned short c)
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| 347 | {
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| 348 | while (first != last)
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| 349 | {
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| 350 | if (*first == c) break;
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| 351 | first++;
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| 352 | }
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| 353 | return first;
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| 354 | }
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| 355 |
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| 356 | text_t::iterator findchar (text_t::iterator first, text_t::iterator last,
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| 357 | unsigned short c)
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| 358 | {
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| 359 | while (first != last)
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| 360 | {
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| 361 | if (*first == c) break;
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| 362 | first++;
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| 363 | }
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| 364 | return first;
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| 365 | }
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| 366 |
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[1860] | 367 | text_t::iterator findword (text_t::iterator first, text_t::iterator last,
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| 368 | const text_t& word)
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| 369 | {
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| 370 | text_t::const_iterator word_begin = word.begin();
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| 371 | text_t::const_iterator word_end = word.end();
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| 372 |
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| 373 | while (first != last)
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| 374 | {
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| 375 | text_t::iterator char_match = first;
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| 376 | text_t::const_iterator word_here = word_begin;
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| 377 | while (word_here!=word_end)
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| 378 | {
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| 379 | if (*char_match != *word_here)
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| 380 | {
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| 381 | break;
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| 382 | }
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| 383 | char_match++;
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| 384 | word_here++;
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| 385 | }
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| 386 | if (word_here==word_end)
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| 387 | {
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| 388 | return first;
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| 389 | }
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| 390 | first++;
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| 391 | }
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| 392 | return last; // get to here only if there is no match
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| 393 | }
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| 394 |
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[1076] | 395 | // get a string up to the next delimiter (which is skipped)
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| 396 | text_t::const_iterator getdelimitstr (text_t::const_iterator first,
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| 397 | text_t::const_iterator last,
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| 398 | unsigned short c, text_t &outstr)
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| 399 | {
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| 400 | text_t::const_iterator here = first;
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| 401 | here = findchar (first, last, c);
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| 402 | outstr.clear();
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| 403 | outstr.appendrange (first, here);
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| 404 | if (here != last) here++; // skip c
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| 405 | return here;
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| 406 | }
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| 407 |
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| 408 | text_t::iterator getdelimitstr (text_t::iterator first, text_t::iterator last,
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| 409 | unsigned short c, text_t &outstr)
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| 410 | {
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| 411 | text_t::iterator here = first;
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| 412 | here = findchar (first, last, c);
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| 413 | outstr.clear();
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| 414 | outstr.appendrange (first, here);
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| 415 | if (here != last) here++; // skip c
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| 416 | return here;
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| 417 | }
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| 418 |
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| 419 | // split a string with a character
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| 420 | void splitchar (text_t::const_iterator first, text_t::const_iterator last,
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| 421 | unsigned short c, text_tset &outlist)
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| 422 | {
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| 423 | outlist.erase(outlist.begin(), outlist.end());
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| 424 |
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| 425 | text_t t;
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| 426 |
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| 427 | while (first != last)
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| 428 | {
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| 429 | first = getdelimitstr (first, last, c, t);
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| 430 | outlist.insert (t);
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| 431 | }
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| 432 | }
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| 433 |
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| 434 | void splitchar (text_t::const_iterator first, text_t::const_iterator last,
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| 435 | unsigned short c, text_tlist &outlist)
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| 436 | {
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| 437 | outlist.erase(outlist.begin(), outlist.end());
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| 438 |
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| 439 | text_t t;
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| 440 |
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| 441 | while (first != last)
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| 442 | {
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| 443 | first = getdelimitstr (first, last, c, t);
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| 444 | outlist.push_back (t);
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| 445 | }
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| 446 | }
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| 447 |
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| 448 | void splitchar (text_t::const_iterator first, text_t::const_iterator last,
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| 449 | unsigned short c, text_tarray &outlist)
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| 450 | {
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| 451 | outlist.erase(outlist.begin(), outlist.end());
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| 452 |
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| 453 | text_t t;
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| 454 |
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| 455 | while (first != last)
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| 456 | {
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| 457 | first = getdelimitstr (first, last, c, t);
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| 458 | outlist.push_back (t);
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| 459 | }
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| 460 | }
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| 461 |
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| 462 | // join a string using a character
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| 463 | void joinchar (const text_tset &inlist, unsigned short c, text_t &outtext)
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| 464 | {
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| 465 | outtext.clear ();
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| 466 |
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| 467 | text_tset::const_iterator here = inlist.begin ();
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| 468 | text_tset::const_iterator end = inlist.end ();
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| 469 | bool first = true;
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| 470 | while (here != end)
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| 471 | {
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| 472 | if (!first) outtext.push_back (c);
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| 473 | first = false;
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| 474 | outtext += *here;
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| 475 | here++;
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| 476 | }
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| 477 | }
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| 478 |
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| 479 | void joinchar (const text_tlist &inlist, unsigned short c, text_t &outtext)
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| 480 | {
|
---|
| 481 | outtext.clear ();
|
---|
| 482 |
|
---|
| 483 | text_tlist::const_iterator here = inlist.begin ();
|
---|
| 484 | text_tlist::const_iterator end = inlist.end ();
|
---|
| 485 | bool first = true;
|
---|
| 486 | while (here != end)
|
---|
| 487 | {
|
---|
| 488 | if (!first) outtext.push_back (c);
|
---|
| 489 | first = false;
|
---|
| 490 | outtext += *here;
|
---|
| 491 | here++;
|
---|
| 492 | }
|
---|
| 493 | }
|
---|
| 494 |
|
---|
| 495 | void joinchar (const text_tarray &inlist, unsigned short c, text_t &outtext)
|
---|
| 496 | {
|
---|
| 497 | outtext.clear ();
|
---|
| 498 |
|
---|
| 499 | text_tarray::const_iterator here = inlist.begin ();
|
---|
| 500 | text_tarray::const_iterator end = inlist.end ();
|
---|
| 501 | bool first = true;
|
---|
| 502 | while (here != end)
|
---|
| 503 | {
|
---|
| 504 | if (!first) outtext.push_back (c);
|
---|
| 505 | first = false;
|
---|
| 506 | outtext += *here;
|
---|
| 507 | here++;
|
---|
| 508 | }
|
---|
| 509 | }
|
---|
| 510 |
|
---|
[1088] | 511 | void joinchar (const text_tlist &inlist, text_t c, text_t &outtext)
|
---|
| 512 | {
|
---|
| 513 | outtext.clear ();
|
---|
| 514 |
|
---|
| 515 | text_tlist::const_iterator here = inlist.begin ();
|
---|
| 516 | text_tlist::const_iterator end = inlist.end ();
|
---|
| 517 | bool first = true;
|
---|
| 518 | while (here != end)
|
---|
| 519 | {
|
---|
| 520 | if (!first) outtext += c;
|
---|
| 521 | first = false;
|
---|
| 522 | outtext += *here;
|
---|
| 523 | here++;
|
---|
| 524 | }
|
---|
| 525 | }
|
---|
| 526 |
|
---|
| 527 | void joinchar (const text_tset &inlist, text_t c, text_t &outtext)
|
---|
| 528 | {
|
---|
| 529 | outtext.clear ();
|
---|
| 530 |
|
---|
| 531 | text_tset::const_iterator here = inlist.begin ();
|
---|
| 532 | text_tset::const_iterator end = inlist.end ();
|
---|
| 533 | bool first = true;
|
---|
| 534 | while (here != end)
|
---|
| 535 | {
|
---|
| 536 | if (!first) outtext += c;
|
---|
| 537 | first = false;
|
---|
| 538 | outtext += *here;
|
---|
| 539 | here++;
|
---|
| 540 | }
|
---|
| 541 | }
|
---|
| 542 |
|
---|
[1076] | 543 | void joinchar (const text_tarray &inlist, text_t c, text_t &outtext)
|
---|
| 544 | {
|
---|
| 545 | outtext.clear ();
|
---|
| 546 |
|
---|
| 547 | text_tarray::const_iterator here = inlist.begin ();
|
---|
| 548 | text_tarray::const_iterator end = inlist.end ();
|
---|
| 549 | bool first = true;
|
---|
| 550 | while (here != end)
|
---|
| 551 | {
|
---|
| 552 | if (!first) outtext += c;
|
---|
| 553 | first = false;
|
---|
| 554 | outtext += *here;
|
---|
| 555 | here++;
|
---|
| 556 | }
|
---|
| 557 | }
|
---|
| 558 |
|
---|
| 559 | // count the occurances of a character within a range
|
---|
| 560 | int countchar (text_t::const_iterator first, text_t::const_iterator last,
|
---|
| 561 | unsigned short c)
|
---|
| 562 | {
|
---|
| 563 | int count = 0;
|
---|
| 564 | while (first != last) {
|
---|
| 565 | if (*first == c) count ++;
|
---|
| 566 | first ++;
|
---|
| 567 | }
|
---|
| 568 | return count;
|
---|
| 569 | }
|
---|
| 570 |
|
---|
| 571 | // return a substring of string from first up to but not including last
|
---|
| 572 | text_t substr (text_t::const_iterator first, text_t::const_iterator last) {
|
---|
| 573 |
|
---|
| 574 | text_t substr;
|
---|
| 575 | while (first != last) {
|
---|
| 576 | substr.push_back(*first);
|
---|
| 577 | first ++;
|
---|
| 578 | }
|
---|
| 579 | return substr;
|
---|
| 580 | }
|
---|
| 581 |
|
---|
| 582 |
|
---|
| 583 | // convert to lowercase
|
---|
| 584 | void lc (text_t::iterator first, text_t::iterator last) {
|
---|
| 585 | while (first != last) {
|
---|
| 586 | *first = unicode_tolower(*first);
|
---|
| 587 | first++;
|
---|
| 588 | }
|
---|
| 589 | }
|
---|
| 590 |
|
---|
| 591 | // convert to uppercase
|
---|
| 592 | void uc (text_t::iterator first, text_t::iterator last) {
|
---|
| 593 | while (first != last) {
|
---|
| 594 | *first = unicode_toupper(*first);
|
---|
| 595 | first++;
|
---|
| 596 | }
|
---|
| 597 | }
|
---|
| 598 |
|
---|
| 599 |
|
---|
| 600 | // checks to see if it is a number (i.e. contains only 0-9)
|
---|
| 601 | bool is_number (const text_t &text) {
|
---|
| 602 |
|
---|
| 603 | text_t::const_iterator here = text.begin();
|
---|
| 604 | text_t::const_iterator end = text.end();
|
---|
| 605 |
|
---|
| 606 | while (here != end) {
|
---|
| 607 | if ((*here!='0') && (*here!='1') && (*here!='2') &&
|
---|
| 608 | (*here!='3') && (*here!='4') && (*here!='5') &&
|
---|
| 609 | (*here!='6') && (*here!='7') && (*here!='8') &&
|
---|
| 610 | (*here!='9')) return false;
|
---|
| 611 | here ++;
|
---|
| 612 | }
|
---|
| 613 | return true;
|
---|
| 614 | }
|
---|
| 615 |
|
---|
| 616 |
|
---|
| 617 | // checks to see if the text has any letters or digits
|
---|
| 618 | bool has_unicode_letdig (const text_t &text) {
|
---|
| 619 | if (text.empty()) return false;
|
---|
| 620 |
|
---|
| 621 | text_t::const_iterator here = text.begin();
|
---|
| 622 | text_t::const_iterator end = text.end();
|
---|
| 623 | while (here != end) {
|
---|
| 624 | if (is_unicode_letdig (*here)) return true;
|
---|
| 625 | here++;
|
---|
| 626 | }
|
---|
| 627 |
|
---|
| 628 | return false;
|
---|
| 629 | }
|
---|
| 630 |
|
---|
| 631 |
|
---|
| 632 |
|
---|
| 633 | ////////////////////////////////////
|
---|
| 634 | // convertclass methods
|
---|
| 635 | ////////////////////////////////////
|
---|
| 636 |
|
---|
| 637 | // conversion classes used for getting information in to and out of
|
---|
| 638 | // the text_t class.
|
---|
| 639 |
|
---|
| 640 | convertclass::convertclass ()
|
---|
| 641 | {
|
---|
| 642 | // nothing to do
|
---|
| 643 | }
|
---|
| 644 |
|
---|
| 645 | void convertclass::reset ()
|
---|
| 646 | {
|
---|
| 647 | // nothing to do
|
---|
| 648 | }
|
---|
| 649 |
|
---|
| 650 |
|
---|
| 651 | ////////////////////////////////////
|
---|
| 652 | // inconvertclass methods
|
---|
| 653 | ////////////////////////////////////
|
---|
| 654 |
|
---|
| 655 | // convert from a char stream to the text_t class
|
---|
| 656 | // the default version assumes the input is a ascii
|
---|
| 657 | // character array
|
---|
| 658 |
|
---|
| 659 | inconvertclass::inconvertclass ()
|
---|
| 660 | {
|
---|
| 661 | start = NULL;
|
---|
| 662 | len = 0;
|
---|
| 663 | }
|
---|
| 664 |
|
---|
| 665 |
|
---|
| 666 | void inconvertclass::reset ()
|
---|
| 667 | {
|
---|
| 668 | start = NULL;
|
---|
| 669 | len = 0;
|
---|
| 670 | }
|
---|
| 671 |
|
---|
| 672 | void inconvertclass::setinput (char *thestart, size_t thelen)
|
---|
| 673 | {
|
---|
| 674 | start = thestart;
|
---|
| 675 | len = thelen;
|
---|
| 676 | }
|
---|
| 677 |
|
---|
| 678 | void inconvertclass::convert (text_t &output, status_t &status)
|
---|
| 679 | {
|
---|
| 680 | output.clear();
|
---|
| 681 |
|
---|
| 682 | if (start == NULL || len == 0)
|
---|
| 683 | {
|
---|
| 684 | status = finished;
|
---|
| 685 | return;
|
---|
| 686 | }
|
---|
| 687 |
|
---|
| 688 | // don't want any funny sign conversions happening
|
---|
| 689 | unsigned char *here = (unsigned char *)start;
|
---|
| 690 | while (len > 0)
|
---|
| 691 | {
|
---|
| 692 | output.push_back (*here); // append this character
|
---|
| 693 | ++here;
|
---|
| 694 | --len;
|
---|
| 695 | }
|
---|
| 696 |
|
---|
| 697 | start = (char *)here; // save current position
|
---|
| 698 | status = finished;
|
---|
| 699 | }
|
---|
| 700 |
|
---|
| 701 | // will treat the text_t as a 8-bit string and convert
|
---|
| 702 | // it to a 16-bit string using the about convert method.
|
---|
| 703 | text_t inconvertclass::convert (const text_t &t) {
|
---|
| 704 | text_t out;
|
---|
| 705 | text_t tmpout;
|
---|
| 706 | status_t status;
|
---|
| 707 | text_t::const_iterator here = t.begin();
|
---|
| 708 | text_t::const_iterator end = t.end();
|
---|
| 709 | unsigned char cbuf[256];
|
---|
| 710 | size_t cbuflen = 0;
|
---|
| 711 |
|
---|
| 712 | while (here != end) {
|
---|
| 713 | while (here != end && cbuflen < 256) {
|
---|
| 714 | cbuf[cbuflen++] = (unsigned char)(*here & 0xff);
|
---|
| 715 | here++;
|
---|
| 716 | }
|
---|
| 717 |
|
---|
| 718 | if (cbuflen > 0) {
|
---|
| 719 | setinput ((char *)cbuf, cbuflen);
|
---|
| 720 | status = unfinished;
|
---|
| 721 | while (status == unfinished) {
|
---|
| 722 | convert (tmpout, status);
|
---|
| 723 | out += tmpout;
|
---|
| 724 | }
|
---|
| 725 | cbuflen = 0;
|
---|
| 726 | }
|
---|
| 727 | }
|
---|
| 728 |
|
---|
| 729 | out.setencoding (0); // unicode
|
---|
| 730 |
|
---|
| 731 | return out;
|
---|
| 732 | }
|
---|
| 733 |
|
---|
| 734 | // an instance of the default inconvertclass to do simple
|
---|
| 735 | // conversions. Note that any functions that use this are
|
---|
| 736 | // not reentrant. If a function needs to be reentrant it
|
---|
| 737 | // should declare its own instance.
|
---|
| 738 | inconvertclass ascii2text_t;
|
---|
| 739 |
|
---|
| 740 |
|
---|
| 741 | ////////////////////////////////////
|
---|
| 742 | // outconvertclass methods
|
---|
| 743 | ////////////////////////////////////
|
---|
| 744 |
|
---|
| 745 | // Convert from a text_t class to a char stream
|
---|
| 746 | // This default version assumes the output is a ascii
|
---|
| 747 | // character array. If you set the output stream you
|
---|
| 748 | // can use this class to output to a stream using the
|
---|
| 749 | // << operator. The << operator can also be conveniently
|
---|
| 750 | // used to set the output stream by doing something like
|
---|
| 751 | //
|
---|
| 752 | // cout << text_t2ascii << text_tstr << anothertext_tstr;
|
---|
| 753 | //
|
---|
| 754 | outconvertclass::outconvertclass ()
|
---|
| 755 | {
|
---|
| 756 | input = NULL;
|
---|
| 757 | outs = NULL;
|
---|
| 758 | }
|
---|
| 759 |
|
---|
| 760 | void outconvertclass::reset ()
|
---|
| 761 | {
|
---|
| 762 | input = NULL;
|
---|
| 763 | outs = NULL;
|
---|
| 764 | }
|
---|
| 765 |
|
---|
| 766 | void outconvertclass::setinput (text_t *theinput)
|
---|
| 767 | {
|
---|
| 768 | input = theinput;
|
---|
| 769 | if (input != NULL) texthere = input->begin();
|
---|
| 770 | }
|
---|
| 771 |
|
---|
| 772 | void outconvertclass::convert (char *output, size_t maxlen,
|
---|
| 773 | size_t &len, status_t &status)
|
---|
| 774 | {
|
---|
| 775 | if (input == NULL || output == NULL)
|
---|
| 776 | {
|
---|
| 777 | status = finished;
|
---|
| 778 | return;
|
---|
| 779 | }
|
---|
| 780 |
|
---|
| 781 | // don't want any funny sign conversions happening
|
---|
| 782 | unsigned char *uoutput = (unsigned char *)output;
|
---|
| 783 | text_t::iterator textend = input->end();
|
---|
| 784 | len = 0;
|
---|
| 785 | while ((len < maxlen) && (texthere != textend))
|
---|
| 786 | {
|
---|
| 787 | if (*texthere < 256) *uoutput = (unsigned char)(*texthere);
|
---|
| 788 | else {
|
---|
| 789 | // put a space or a question mark depending on what
|
---|
| 790 | // the character is. Question marks tell the user that
|
---|
| 791 | // they are missing some information.
|
---|
| 792 | if (is_unicode_space (*texthere)) *uoutput = ' ';
|
---|
| 793 | else *uoutput = '?';
|
---|
| 794 | }
|
---|
| 795 | ++uoutput;
|
---|
| 796 | ++len;
|
---|
| 797 | ++texthere;
|
---|
| 798 | }
|
---|
| 799 |
|
---|
| 800 | if (texthere == textend) status = finished;
|
---|
| 801 | else status = unfinished;
|
---|
| 802 | }
|
---|
| 803 |
|
---|
| 804 | // will convert the 16-bit string to a 8-bit stream
|
---|
| 805 | // and place the result in a text_t. This method uses
|
---|
| 806 | // the above convert function.
|
---|
| 807 | text_t outconvertclass::convert (const text_t &t) {
|
---|
| 808 | text_t out;
|
---|
| 809 | unsigned char cbuf[256];
|
---|
| 810 | size_t cbuflen = 0;
|
---|
| 811 | status_t status = unfinished;
|
---|
| 812 |
|
---|
| 813 | setinput ((text_t *)&t); // discard constant
|
---|
| 814 | while (status == unfinished) {
|
---|
| 815 | convert ((char *)cbuf, 256, cbuflen, status);
|
---|
| 816 | out.appendcarr ((char *)cbuf, cbuflen);
|
---|
| 817 | }
|
---|
| 818 |
|
---|
| 819 | out.setencoding (1); // other encoding
|
---|
| 820 |
|
---|
| 821 | return out;
|
---|
| 822 | }
|
---|
| 823 |
|
---|
| 824 |
|
---|
| 825 | void outconvertclass::setostream (ostream *theouts)
|
---|
| 826 | {
|
---|
| 827 | outs = theouts;
|
---|
| 828 | }
|
---|
| 829 |
|
---|
| 830 | ostream *outconvertclass::getostream ()
|
---|
| 831 | {
|
---|
| 832 | return outs;
|
---|
| 833 | }
|
---|
| 834 |
|
---|
| 835 |
|
---|
| 836 |
|
---|
| 837 |
|
---|
| 838 | // an instance of the default outconvertclass to do simple
|
---|
| 839 | // conversions
|
---|
| 840 | outconvertclass text_t2ascii;
|
---|
| 841 |
|
---|
| 842 |
|
---|
| 843 |
|
---|
| 844 | // stream operators for the output class
|
---|
| 845 |
|
---|
| 846 | outconvertclass &operator<< (ostream &theouts, outconvertclass &outconverter)
|
---|
| 847 | {
|
---|
| 848 | outconverter.setostream(&theouts);
|
---|
| 849 | return outconverter;
|
---|
| 850 | }
|
---|
| 851 |
|
---|
| 852 |
|
---|
| 853 | #define STREAMBUFSIZE 256
|
---|
| 854 | outconvertclass &operator<< (outconvertclass &outconverter, const text_t &t)
|
---|
| 855 | {
|
---|
| 856 | ostream *outstream = outconverter.getostream();
|
---|
| 857 |
|
---|
| 858 | if (outstream == NULL) return outconverter;
|
---|
| 859 |
|
---|
| 860 | char outbuf[STREAMBUFSIZE];
|
---|
| 861 | size_t len;
|
---|
| 862 | outconvertclass::status_t status = outconvertclass::unfinished;
|
---|
| 863 |
|
---|
| 864 | // assume that there is no data needing converting
|
---|
| 865 | // left in the converter
|
---|
| 866 | outconverter.setinput ((text_t *)(&t)); // note the const -> nonconst conversion
|
---|
| 867 |
|
---|
| 868 | while (status == outconvertclass::unfinished)
|
---|
| 869 | {
|
---|
| 870 | outconverter.convert (outbuf, STREAMBUFSIZE, len, status);
|
---|
| 871 | if (len > 0) outstream->write(outbuf, len);
|
---|
| 872 | }
|
---|
| 873 |
|
---|
| 874 | return outconverter;
|
---|
| 875 | }
|
---|