[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 15077 2008-03-10 02:18:07Z mdewsnip $
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| 25 | *
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[1076] | 26 | *********************************************************************/
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| 27 |
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| 28 | #include "text_t.h"
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| 29 |
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| 30 | #if defined(GSDL_USE_OBJECTSPACE)
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| 31 | # include <ospace\std\algorithm>
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| 32 | #elif defined(GSDL_USE_STL_H)
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| 33 | # if defined(GSDL_USE_ALGO_H)
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| 34 | # include <algo.h>
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| 35 | # else
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| 36 | # include <algorithm.h>
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| 37 | # endif
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| 38 | #else
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| 39 | # include <algorithm>
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| 40 | #endif
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| 41 |
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[1860] | 42 | #ifdef HAVE_CONFIG_H
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| 43 | # ifdef __WIN32__
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[14909] | 44 | # include "win32cfg.h"
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[1860] | 45 | # else
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| 46 | # include "config.h"
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| 47 | # endif
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| 48 | #endif
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[1076] | 49 |
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[1860] | 50 |
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[1076] | 51 | #include "unitool.h"
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| 52 |
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[7382] | 53 | const text_t g_EmptyText("");
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| 54 |
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[1076] | 55 | ////////////////////////////////////
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| 56 | // text_t methods
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| 57 | ////////////////////////////////////
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| 58 |
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[1860] | 59 | // new stream converter ...
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[8727] | 60 | ostream& operator<< (ostream &o, const text_t &text)
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[1860] | 61 | {
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| 62 | text_t::const_iterator ithere = text.begin();
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| 63 | text_t::const_iterator itend = text.end();
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| 64 |
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| 65 | while (ithere != itend)
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| 66 | {
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| 67 | if (*ithere < 256)
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| 68 | {
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| 69 | o << (unsigned char)(*ithere);
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| 70 | }
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| 71 | else
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| 72 | {
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| 73 | // put a space or a question mark depending on what
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| 74 | // the character is. Question marks tell the user that
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| 75 | // they are missing some information.
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| 76 | if (is_unicode_space (*ithere))
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| 77 | o << ' ';
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| 78 | else
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| 79 | o << '?';
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| 80 | }
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[8727] | 81 | ++ithere;
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[1860] | 82 | }
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| 83 |
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| 84 | return o;
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| 85 | }
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| 86 |
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[1076] | 87 | text_t::text_t ()
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| 88 | {
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| 89 | setencoding(0);
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| 90 | clear ();
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| 91 | }
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| 92 |
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| 93 | text_t::text_t (int i)
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| 94 | {
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| 95 | setencoding(0);
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| 96 | clear ();
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| 97 | appendint (i);
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| 98 | }
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| 99 |
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[8727] | 100 | text_t::text_t (const char *s)
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[1076] | 101 | {
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| 102 | setencoding(0);
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| 103 | clear ();
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| 104 | appendcstr (s);
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| 105 | }
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| 106 |
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[8727] | 107 | text_t::text_t (const char *s, size_type nLength)
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| 108 | {
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| 109 | setencoding(0);
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| 110 | clear ();
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| 111 | appendcarr(s, nLength);
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| 112 | }
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[1860] | 113 |
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[8727] | 114 |
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[1076] | 115 | void text_t::append (const text_t &t)
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| 116 | {
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| 117 | text.insert(text.end(), t.begin(), t.end());
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| 118 | }
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| 119 |
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| 120 | void text_t::appendrange (iterator first, iterator last)
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| 121 | {
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| 122 | text.insert(text.end(), first, last);
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| 123 | }
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| 124 |
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| 125 | void text_t::appendrange (const_iterator first, const_iterator last)
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| 126 | {
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| 127 | text.insert(text.end(), first, last);
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| 128 | }
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| 129 |
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| 130 | void text_t::appendint (int i)
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| 131 | {
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| 132 | // deal with zeros and negatives
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| 133 | if (i == 0)
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| 134 | {
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| 135 | text.push_back('0');
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| 136 | return;
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| 137 | }
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| 138 | else if (i < 0)
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| 139 | {
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| 140 | text.push_back('-');
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| 141 | i *= -1;
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| 142 | }
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| 143 |
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| 144 | // get a buffer for the conversion
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| 145 | int maxbuflen = sizeof(int)*3;
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| 146 | char *buf = new char[maxbuflen];
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| 147 | int len = 0;
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| 148 |
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| 149 | // get the number in reverse
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| 150 | while (i > 0)
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| 151 | {
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| 152 | buf[len++] = '0'+ (i%10);
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| 153 | i = i/10;
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| 154 | }
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| 155 |
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| 156 | // reverse the number
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| 157 | while (len > 0)
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| 158 | {
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| 159 | text.push_back(buf[--len]);
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| 160 | }
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| 161 |
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[8727] | 162 | delete []buf;
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[1076] | 163 | }
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| 164 |
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| 165 | int text_t::getint () const
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| 166 | {
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| 167 | int i = 0;
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| 168 | int mult = 1; // become -1 for negative numbers
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| 169 |
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| 170 | const_iterator here = text.begin();
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| 171 | const_iterator end = text.end();
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| 172 |
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| 173 | // do plus and minus signs
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| 174 | if (here != end)
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| 175 | {
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| 176 | if (*here == '-')
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| 177 | {
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| 178 | mult = -1;
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[9593] | 179 | ++here;
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[1076] | 180 | }
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| 181 | else if (*here == '+')
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| 182 | {
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| 183 | mult = 1;
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[8727] | 184 | ++here;
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[1076] | 185 | }
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| 186 | }
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| 187 |
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| 188 | // deal with the number
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| 189 | while ((here != end) && (*here >= '0') && (*here <= '9'))
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| 190 | {
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| 191 | i = 10*i + (*here - '0');
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[8727] | 192 | ++here;
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[1076] | 193 | }
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| 194 |
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| 195 | i *= mult;
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| 196 | return i;
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| 197 | }
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| 198 |
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[2487] | 199 | unsigned long text_t::getulong () const
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| 200 | {
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| 201 | unsigned long i = 0;
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[1076] | 202 |
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[2487] | 203 | const_iterator here = text.begin();
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| 204 | const_iterator end = text.end();
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[1076] | 205 |
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[2487] | 206 | while ((here != end) && (*here >= '0') && (*here <= '9'))
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| 207 | {
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| 208 | i = 10*i + (*here - '0');
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[8727] | 209 | ++here;
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[2487] | 210 | }
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| 211 |
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| 212 | return i;
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| 213 | }
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| 214 |
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[8727] | 215 | void text_t::appendcarr (const char *s, size_type len)
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[1076] | 216 | {
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| 217 | unsigned char *us = (unsigned char *)s;
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[8727] | 218 | if (text.capacity() < (text.size() + len + 2)) {
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| 219 | text.reserve(text.size() + len + 2);
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| 220 | }
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| 221 |
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[1076] | 222 | while (len > 0)
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| 223 | {
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| 224 | text.push_back (*us); // append this character
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[8727] | 225 | ++us;
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| 226 | --len;
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[1076] | 227 | }
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| 228 | }
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| 229 |
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[8727] | 230 | void text_t::appendcstr (const char *s)
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[1076] | 231 | {
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[8727] | 232 | size_t len = strlen(s);
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| 233 | if (text.capacity() < (text.size() + len + 2)) {
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| 234 | text.reserve(text.size() + len + 2);
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| 235 | }
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| 236 |
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[1076] | 237 | unsigned char *us = (unsigned char *)s;
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| 238 | while (*us != '\0')
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| 239 | {
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| 240 | text.push_back (*us); // append this character
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[8727] | 241 | ++us;
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[1076] | 242 | }
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| 243 | }
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| 244 |
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| 245 |
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| 246 | // strings returned from getcarr and getcstr become the callers
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[8727] | 247 | // responsibility and should be deallocated with "delete []"
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[1076] | 248 |
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| 249 | char *text_t::getcarr(size_type &len) const
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| 250 | {
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| 251 | unsigned char *cstr = new unsigned char[size()];
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| 252 | len = 0;
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| 253 |
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| 254 | const_iterator ithere = begin();
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| 255 | const_iterator itend = end();
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| 256 | while (ithere != itend)
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| 257 | {
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| 258 | if (*ithere < 256) cstr[len] = (unsigned char)(*ithere);
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| 259 | else {
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| 260 | // put a space or a question mark depending on what
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| 261 | // the character is. Question marks tell the user that
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| 262 | // they are missing some information.
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| 263 | if (is_unicode_space (*ithere)) cstr[len] = ' ';
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| 264 | else cstr[len] = '?';
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| 265 | }
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[8727] | 266 | ++len;
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| 267 | ++ithere;
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[1076] | 268 | }
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| 269 |
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| 270 | return (char *)cstr;
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| 271 | }
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| 272 |
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| 273 | char *text_t::getcstr() const
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| 274 | {
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| 275 | unsigned char *cstr = new unsigned char[size() + 1];
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| 276 | const_iterator ithere = begin();
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| 277 | const_iterator itend = end();
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| 278 | int len = 0;
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| 279 |
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| 280 | while (ithere != itend)
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| 281 | {
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| 282 | if (*ithere < 256) cstr[len] = (unsigned char)(*ithere);
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| 283 | else {
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| 284 | // put a space or a question mark depending on what
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| 285 | // the character is. Question marks tell the user that
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| 286 | // they are missing some information.
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| 287 | if (is_unicode_space (*ithere)) cstr[len] = ' ';
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| 288 | else cstr[len] = '?';
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| 289 | }
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[8727] | 290 | ++len;
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| 291 | ++ithere;
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[1076] | 292 | }
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| 293 |
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| 294 | cstr[len] = '\0';
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| 295 |
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| 296 | return (char *)cstr;
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| 297 | }
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| 298 |
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| 299 |
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[14342] | 300 | int text_t::replace(text_t toreplace, text_t replacement)
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| 301 | {
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| 302 | // Get the beginning and end of the current text
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| 303 | text_t::iterator text_begin = text.begin(), text_end = text.end();
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| 304 | int count = 0;
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| 305 | text_t new_text, temp_text;
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| 306 |
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| 307 | // Loop through and grab the text off the end
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| 308 | while (text_begin < text_end)
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| 309 | {
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| 310 | // Find where the next toreplace is
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| 311 | text_t::iterator next_toreplace = findword(text_begin, text_end, toreplace);
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| 312 |
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[15077] | 313 | // We've found a match
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| 314 | if (next_toreplace != text_end)
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[14342] | 315 | {
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[15077] | 316 | new_text.append(substr(text_begin, next_toreplace));
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| 317 | new_text.append(replacement);
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| 318 | count++;
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| 319 | text_begin = next_toreplace + toreplace.size();
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[14342] | 320 | }
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[15077] | 321 | // We haven't found a match
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[14342] | 322 | else
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| 323 | {
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[15077] | 324 | new_text.append(substr(text_begin, text_end));
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| 325 | text_begin = text_end;
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[14342] | 326 | }
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| 327 | }
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| 328 |
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| 329 | text.clear();
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| 330 | text = new_text.text_as_usvector();
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| 331 | return count;
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| 332 | }
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| 333 |
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| 334 |
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[1076] | 335 | // general functions which work on text_ts
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| 336 |
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| 337 | // find a character within a range
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| 338 | text_t::const_iterator findchar (text_t::const_iterator first, text_t::const_iterator last,
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| 339 | unsigned short c)
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| 340 | {
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| 341 | while (first != last)
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| 342 | {
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| 343 | if (*first == c) break;
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[8727] | 344 | ++first;
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[1076] | 345 | }
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| 346 | return first;
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| 347 | }
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| 348 |
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| 349 | text_t::iterator findchar (text_t::iterator first, text_t::iterator last,
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| 350 | unsigned short c)
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| 351 | {
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| 352 | while (first != last)
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| 353 | {
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| 354 | if (*first == c) break;
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[8727] | 355 | ++first;
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[1076] | 356 | }
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| 357 | return first;
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| 358 | }
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| 359 |
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[12504] | 360 | text_t::iterator findlastchar (text_t::iterator first, text_t::iterator last,
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| 361 | unsigned short c)
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| 362 | {
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| 363 | text_t::iterator current = last;
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| 364 | while (current != first) {
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| 365 | if (*current == c) break;
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| 366 | --current;
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| 367 | }
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| 368 | if (current == first) {
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| 369 | if (*current == c) return current;
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| 370 | return last;
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| 371 | }
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| 372 |
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| 373 | return current;
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| 374 | }
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| 375 |
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[8727] | 376 | text_t::iterator findword (text_t::iterator first,
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| 377 | text_t::iterator last,
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[1860] | 378 | const text_t& word)
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| 379 | {
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| 380 | text_t::const_iterator word_begin = word.begin();
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| 381 | text_t::const_iterator word_end = word.end();
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| 382 |
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| 383 | while (first != last)
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| 384 | {
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| 385 | text_t::iterator char_match = first;
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| 386 | text_t::const_iterator word_here = word_begin;
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| 387 | while (word_here!=word_end)
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| 388 | {
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| 389 | if (*char_match != *word_here)
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| 390 | {
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| 391 | break;
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| 392 | }
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[8727] | 393 | ++char_match;
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| 394 | ++word_here;
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[1860] | 395 | }
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| 396 | if (word_here==word_end)
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| 397 | {
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| 398 | return first;
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| 399 | }
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[8727] | 400 | ++first;
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[1860] | 401 | }
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| 402 | return last; // get to here only if there is no match
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| 403 | }
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| 404 |
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[1076] | 405 | // get a string up to the next delimiter (which is skipped)
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| 406 | text_t::const_iterator getdelimitstr (text_t::const_iterator first,
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| 407 | text_t::const_iterator last,
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| 408 | unsigned short c, text_t &outstr)
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| 409 | {
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| 410 | text_t::const_iterator here = first;
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| 411 | here = findchar (first, last, c);
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| 412 | outstr.clear();
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| 413 | outstr.appendrange (first, here);
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[8727] | 414 | if (here != last) ++here; // skip c
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[1076] | 415 | return here;
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| 416 | }
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| 417 |
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| 418 | text_t::iterator getdelimitstr (text_t::iterator first, text_t::iterator last,
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| 419 | unsigned short c, text_t &outstr)
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| 420 | {
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| 421 | text_t::iterator here = first;
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| 422 | here = findchar (first, last, c);
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| 423 | outstr.clear();
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| 424 | outstr.appendrange (first, here);
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[8727] | 425 | if (here != last) ++here; // skip c
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[1076] | 426 | return here;
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| 427 | }
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| 428 |
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| 429 | // split a string with a character
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| 430 | void splitchar (text_t::const_iterator first, text_t::const_iterator last,
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| 431 | unsigned short c, text_tset &outlist)
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| 432 | {
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| 433 | outlist.erase(outlist.begin(), outlist.end());
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| 434 |
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| 435 | text_t t;
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| 436 |
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| 437 | while (first != last)
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| 438 | {
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| 439 | first = getdelimitstr (first, last, c, t);
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| 440 | outlist.insert (t);
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| 441 | }
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| 442 | }
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| 443 |
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| 444 | void splitchar (text_t::const_iterator first, text_t::const_iterator last,
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| 445 | unsigned short c, text_tlist &outlist)
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| 446 | {
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| 447 | outlist.erase(outlist.begin(), outlist.end());
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| 448 |
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| 449 | text_t t;
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| 450 |
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| 451 | while (first != last)
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| 452 | {
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| 453 | first = getdelimitstr (first, last, c, t);
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| 454 | outlist.push_back (t);
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| 455 | }
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| 456 | }
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| 457 |
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| 458 | void splitchar (text_t::const_iterator first, text_t::const_iterator last,
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| 459 | unsigned short c, text_tarray &outlist)
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| 460 | {
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| 461 | outlist.erase(outlist.begin(), outlist.end());
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| 462 |
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| 463 | text_t t;
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| 464 |
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| 465 | while (first != last)
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| 466 | {
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| 467 | first = getdelimitstr (first, last, c, t);
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| 468 | outlist.push_back (t);
|
---|
| 469 | }
|
---|
| 470 | }
|
---|
| 471 |
|
---|
| 472 | // join a string using a character
|
---|
| 473 | void joinchar (const text_tset &inlist, unsigned short c, text_t &outtext)
|
---|
| 474 | {
|
---|
| 475 | outtext.clear ();
|
---|
| 476 |
|
---|
| 477 | text_tset::const_iterator here = inlist.begin ();
|
---|
| 478 | text_tset::const_iterator end = inlist.end ();
|
---|
[8727] | 479 |
|
---|
| 480 | if (here != end) {
|
---|
| 481 | outtext += *here; ++here;
|
---|
| 482 | while (here != end) {
|
---|
| 483 | outtext.push_back (c);
|
---|
[1076] | 484 | outtext += *here;
|
---|
[8727] | 485 | ++here;
|
---|
[1076] | 486 | }
|
---|
[8727] | 487 | }
|
---|
[1076] | 488 | }
|
---|
| 489 |
|
---|
| 490 | void joinchar (const text_tlist &inlist, unsigned short c, text_t &outtext)
|
---|
| 491 | {
|
---|
| 492 | outtext.clear ();
|
---|
| 493 |
|
---|
| 494 | text_tlist::const_iterator here = inlist.begin ();
|
---|
| 495 | text_tlist::const_iterator end = inlist.end ();
|
---|
[8727] | 496 | if (here != end) {
|
---|
| 497 | outtext += *here; ++here;
|
---|
| 498 | while (here != end) {
|
---|
| 499 | outtext.push_back (c);
|
---|
[1076] | 500 | outtext += *here;
|
---|
[8727] | 501 | ++here;
|
---|
[1076] | 502 | }
|
---|
[8727] | 503 | }
|
---|
[1076] | 504 | }
|
---|
| 505 |
|
---|
| 506 | void joinchar (const text_tarray &inlist, unsigned short c, text_t &outtext)
|
---|
| 507 | {
|
---|
| 508 | outtext.clear ();
|
---|
| 509 |
|
---|
| 510 | text_tarray::const_iterator here = inlist.begin ();
|
---|
| 511 | text_tarray::const_iterator end = inlist.end ();
|
---|
[8727] | 512 | if (here != end) {
|
---|
| 513 | outtext += *here; ++here;
|
---|
| 514 | while (here != end) {
|
---|
| 515 | outtext.push_back (c);
|
---|
[1076] | 516 | outtext += *here;
|
---|
[8727] | 517 | ++here;
|
---|
[1076] | 518 | }
|
---|
[8727] | 519 | }
|
---|
[1076] | 520 | }
|
---|
| 521 |
|
---|
[8727] | 522 | void joinchar (const text_tlist &inlist, const text_t &c, text_t &outtext)
|
---|
[1088] | 523 | {
|
---|
| 524 | outtext.clear ();
|
---|
| 525 |
|
---|
| 526 | text_tlist::const_iterator here = inlist.begin ();
|
---|
| 527 | text_tlist::const_iterator end = inlist.end ();
|
---|
[8727] | 528 | if (here != end) {
|
---|
| 529 | outtext += *here; ++here;
|
---|
| 530 | while (here != end) {
|
---|
| 531 | outtext += c;
|
---|
[1088] | 532 | outtext += *here;
|
---|
[8727] | 533 | ++here;
|
---|
[1088] | 534 | }
|
---|
[8727] | 535 | }
|
---|
[1088] | 536 | }
|
---|
| 537 |
|
---|
[8727] | 538 | void joinchar (const text_tset &inlist, const text_t &c, text_t &outtext)
|
---|
[1088] | 539 | {
|
---|
| 540 | outtext.clear ();
|
---|
| 541 |
|
---|
| 542 | text_tset::const_iterator here = inlist.begin ();
|
---|
| 543 | text_tset::const_iterator end = inlist.end ();
|
---|
[8727] | 544 | if (here != end) {
|
---|
| 545 | outtext += *here; ++here;
|
---|
| 546 | while (here != end) {
|
---|
| 547 | outtext += c;
|
---|
[1088] | 548 | outtext += *here;
|
---|
[8727] | 549 | ++here;
|
---|
[1088] | 550 | }
|
---|
[8727] | 551 | }
|
---|
[1088] | 552 | }
|
---|
| 553 |
|
---|
[8727] | 554 | void joinchar (const text_tarray &inlist, const text_t &c, text_t &outtext)
|
---|
[1076] | 555 | {
|
---|
| 556 | outtext.clear ();
|
---|
| 557 |
|
---|
| 558 | text_tarray::const_iterator here = inlist.begin ();
|
---|
| 559 | text_tarray::const_iterator end = inlist.end ();
|
---|
[8727] | 560 | if (here != end) {
|
---|
| 561 | outtext += *here; ++here;
|
---|
| 562 | while (here != end) {
|
---|
| 563 | outtext += c;
|
---|
[1076] | 564 | outtext += *here;
|
---|
[8727] | 565 | ++here;
|
---|
[1076] | 566 | }
|
---|
[8727] | 567 | }
|
---|
[1076] | 568 | }
|
---|
| 569 |
|
---|
| 570 | // count the occurances of a character within a range
|
---|
| 571 | int countchar (text_t::const_iterator first, text_t::const_iterator last,
|
---|
| 572 | unsigned short c)
|
---|
| 573 | {
|
---|
| 574 | int count = 0;
|
---|
| 575 | while (first != last) {
|
---|
[9593] | 576 | if (*first == c) ++count;
|
---|
| 577 | ++first;
|
---|
[1076] | 578 | }
|
---|
| 579 | return count;
|
---|
| 580 | }
|
---|
| 581 |
|
---|
| 582 | // return a substring of string from first up to but not including last
|
---|
| 583 | text_t substr (text_t::const_iterator first, text_t::const_iterator last) {
|
---|
| 584 |
|
---|
[8727] | 585 | text_t substr; substr.reserve(last - first + 2);
|
---|
[1076] | 586 | while (first != last) {
|
---|
| 587 | substr.push_back(*first);
|
---|
[8727] | 588 | ++first;
|
---|
[1076] | 589 | }
|
---|
| 590 | return substr;
|
---|
| 591 | }
|
---|
| 592 |
|
---|
| 593 |
|
---|
| 594 | // convert to lowercase
|
---|
| 595 | void lc (text_t::iterator first, text_t::iterator last) {
|
---|
| 596 | while (first != last) {
|
---|
| 597 | *first = unicode_tolower(*first);
|
---|
[8727] | 598 | ++first;
|
---|
[1076] | 599 | }
|
---|
| 600 | }
|
---|
| 601 |
|
---|
| 602 | // convert to uppercase
|
---|
| 603 | void uc (text_t::iterator first, text_t::iterator last) {
|
---|
| 604 | while (first != last) {
|
---|
| 605 | *first = unicode_toupper(*first);
|
---|
[8727] | 606 | ++first;
|
---|
[1076] | 607 | }
|
---|
| 608 | }
|
---|
| 609 |
|
---|
| 610 |
|
---|
| 611 | // checks to see if it is a number (i.e. contains only 0-9)
|
---|
| 612 | bool is_number (const text_t &text) {
|
---|
| 613 |
|
---|
| 614 | text_t::const_iterator here = text.begin();
|
---|
| 615 | text_t::const_iterator end = text.end();
|
---|
| 616 |
|
---|
| 617 | while (here != end) {
|
---|
| 618 | if ((*here!='0') && (*here!='1') && (*here!='2') &&
|
---|
| 619 | (*here!='3') && (*here!='4') && (*here!='5') &&
|
---|
| 620 | (*here!='6') && (*here!='7') && (*here!='8') &&
|
---|
| 621 | (*here!='9')) return false;
|
---|
[8727] | 622 | ++here;
|
---|
[1076] | 623 | }
|
---|
| 624 | return true;
|
---|
| 625 | }
|
---|
| 626 |
|
---|
| 627 |
|
---|
| 628 | // checks to see if the text has any letters or digits
|
---|
| 629 | bool has_unicode_letdig (const text_t &text) {
|
---|
| 630 | if (text.empty()) return false;
|
---|
| 631 |
|
---|
| 632 | text_t::const_iterator here = text.begin();
|
---|
| 633 | text_t::const_iterator end = text.end();
|
---|
| 634 | while (here != end) {
|
---|
| 635 | if (is_unicode_letdig (*here)) return true;
|
---|
[8727] | 636 | ++here;
|
---|
[1076] | 637 | }
|
---|
| 638 |
|
---|
| 639 | return false;
|
---|
| 640 | }
|
---|
| 641 |
|
---|
[10140] | 642 | // checks to see if a text_t starts with the specified prefix
|
---|
| 643 | bool starts_with(const text_t& text, const text_t& prefix) {
|
---|
| 644 | if (prefix.empty()) return true;
|
---|
| 645 | if (text.empty() || text.size()<prefix.size()) return false;
|
---|
| 646 | text_t substring = substr(text.begin(), text.begin()+prefix.size());
|
---|
| 647 | return substring == prefix;
|
---|
| 648 | }
|
---|
| 649 | // checks to see if a text_t ends with the specified suffix
|
---|
| 650 | bool ends_with(const text_t& text, const text_t& suffix) {
|
---|
| 651 | if (suffix.empty()) return true;
|
---|
| 652 | if (text.empty() || text.size() < suffix.size()) return false;
|
---|
| 653 | text_t substring = substr(text.end()-suffix.size(),text.end());
|
---|
| 654 | return substring == suffix;
|
---|
[1076] | 655 |
|
---|
[10140] | 656 | }
|
---|
[1076] | 657 |
|
---|
[10140] | 658 |
|
---|
[1076] | 659 | ////////////////////////////////////
|
---|
| 660 | // convertclass methods
|
---|
| 661 | ////////////////////////////////////
|
---|
| 662 |
|
---|
| 663 | // conversion classes used for getting information in to and out of
|
---|
| 664 | // the text_t class.
|
---|
| 665 |
|
---|
| 666 | convertclass::convertclass ()
|
---|
| 667 | {
|
---|
| 668 | // nothing to do
|
---|
| 669 | }
|
---|
| 670 |
|
---|
| 671 | void convertclass::reset ()
|
---|
| 672 | {
|
---|
| 673 | // nothing to do
|
---|
| 674 | }
|
---|
| 675 |
|
---|
| 676 |
|
---|
| 677 | ////////////////////////////////////
|
---|
| 678 | // inconvertclass methods
|
---|
| 679 | ////////////////////////////////////
|
---|
| 680 |
|
---|
| 681 | // convert from a char stream to the text_t class
|
---|
| 682 | // the default version assumes the input is a ascii
|
---|
| 683 | // character array
|
---|
| 684 |
|
---|
| 685 | inconvertclass::inconvertclass ()
|
---|
| 686 | {
|
---|
| 687 | start = NULL;
|
---|
| 688 | len = 0;
|
---|
| 689 | }
|
---|
| 690 |
|
---|
| 691 |
|
---|
| 692 | void inconvertclass::reset ()
|
---|
| 693 | {
|
---|
| 694 | start = NULL;
|
---|
| 695 | len = 0;
|
---|
| 696 | }
|
---|
| 697 |
|
---|
| 698 | void inconvertclass::setinput (char *thestart, size_t thelen)
|
---|
| 699 | {
|
---|
| 700 | start = thestart;
|
---|
| 701 | len = thelen;
|
---|
| 702 | }
|
---|
| 703 |
|
---|
| 704 | void inconvertclass::convert (text_t &output, status_t &status)
|
---|
| 705 | {
|
---|
| 706 | output.clear();
|
---|
| 707 |
|
---|
| 708 | if (start == NULL || len == 0)
|
---|
| 709 | {
|
---|
| 710 | status = finished;
|
---|
| 711 | return;
|
---|
| 712 | }
|
---|
| 713 |
|
---|
[8727] | 714 | if (output.capacity() < len + 2)
|
---|
| 715 | output.reserve(len + 2);
|
---|
| 716 |
|
---|
[1076] | 717 | // don't want any funny sign conversions happening
|
---|
| 718 | unsigned char *here = (unsigned char *)start;
|
---|
| 719 | while (len > 0)
|
---|
| 720 | {
|
---|
| 721 | output.push_back (*here); // append this character
|
---|
| 722 | ++here;
|
---|
| 723 | --len;
|
---|
| 724 | }
|
---|
| 725 |
|
---|
| 726 | start = (char *)here; // save current position
|
---|
| 727 | status = finished;
|
---|
| 728 | }
|
---|
| 729 |
|
---|
| 730 | // will treat the text_t as a 8-bit string and convert
|
---|
| 731 | // it to a 16-bit string using the about convert method.
|
---|
| 732 | text_t inconvertclass::convert (const text_t &t) {
|
---|
| 733 | text_t out;
|
---|
| 734 | text_t tmpout;
|
---|
| 735 | status_t status;
|
---|
| 736 | text_t::const_iterator here = t.begin();
|
---|
| 737 | text_t::const_iterator end = t.end();
|
---|
| 738 | unsigned char cbuf[256];
|
---|
| 739 | size_t cbuflen = 0;
|
---|
| 740 |
|
---|
[8727] | 741 | out.clear();
|
---|
| 742 | if (out.capacity() < t.size() + 2)
|
---|
| 743 | out.reserve(t.size() + 2);
|
---|
[1076] | 744 | while (here != end) {
|
---|
| 745 | while (here != end && cbuflen < 256) {
|
---|
| 746 | cbuf[cbuflen++] = (unsigned char)(*here & 0xff);
|
---|
[8727] | 747 | ++here;
|
---|
[1076] | 748 | }
|
---|
| 749 |
|
---|
| 750 | if (cbuflen > 0) {
|
---|
| 751 | setinput ((char *)cbuf, cbuflen);
|
---|
| 752 | status = unfinished;
|
---|
| 753 | while (status == unfinished) {
|
---|
| 754 | convert (tmpout, status);
|
---|
| 755 | out += tmpout;
|
---|
| 756 | }
|
---|
| 757 | cbuflen = 0;
|
---|
| 758 | }
|
---|
| 759 | }
|
---|
| 760 |
|
---|
| 761 | out.setencoding (0); // unicode
|
---|
| 762 |
|
---|
| 763 | return out;
|
---|
| 764 | }
|
---|
| 765 |
|
---|
| 766 | // an instance of the default inconvertclass to do simple
|
---|
| 767 | // conversions. Note that any functions that use this are
|
---|
| 768 | // not reentrant. If a function needs to be reentrant it
|
---|
| 769 | // should declare its own instance.
|
---|
| 770 | inconvertclass ascii2text_t;
|
---|
| 771 |
|
---|
| 772 |
|
---|
| 773 | ////////////////////////////////////
|
---|
| 774 | // outconvertclass methods
|
---|
| 775 | ////////////////////////////////////
|
---|
| 776 |
|
---|
| 777 | // Convert from a text_t class to a char stream
|
---|
| 778 | // This default version assumes the output is a ascii
|
---|
| 779 | // character array. If you set the output stream you
|
---|
| 780 | // can use this class to output to a stream using the
|
---|
| 781 | // << operator. The << operator can also be conveniently
|
---|
| 782 | // used to set the output stream by doing something like
|
---|
| 783 | //
|
---|
| 784 | // cout << text_t2ascii << text_tstr << anothertext_tstr;
|
---|
| 785 | //
|
---|
| 786 | outconvertclass::outconvertclass ()
|
---|
| 787 | {
|
---|
| 788 | input = NULL;
|
---|
| 789 | outs = NULL;
|
---|
| 790 | }
|
---|
| 791 |
|
---|
| 792 | void outconvertclass::reset ()
|
---|
| 793 | {
|
---|
| 794 | input = NULL;
|
---|
| 795 | outs = NULL;
|
---|
| 796 | }
|
---|
| 797 |
|
---|
| 798 | void outconvertclass::setinput (text_t *theinput)
|
---|
| 799 | {
|
---|
| 800 | input = theinput;
|
---|
| 801 | if (input != NULL) texthere = input->begin();
|
---|
| 802 | }
|
---|
| 803 |
|
---|
[8727] | 804 | void outconvertclass::setdata(text_t *theinput, text_t::iterator thetexthere)
|
---|
| 805 | {
|
---|
| 806 | input = theinput;
|
---|
| 807 | texthere = thetexthere;
|
---|
| 808 | }
|
---|
| 809 |
|
---|
[1076] | 810 | void outconvertclass::convert (char *output, size_t maxlen,
|
---|
| 811 | size_t &len, status_t &status)
|
---|
| 812 | {
|
---|
| 813 | if (input == NULL || output == NULL)
|
---|
| 814 | {
|
---|
| 815 | status = finished;
|
---|
| 816 | return;
|
---|
| 817 | }
|
---|
| 818 |
|
---|
| 819 | // don't want any funny sign conversions happening
|
---|
| 820 | unsigned char *uoutput = (unsigned char *)output;
|
---|
| 821 | text_t::iterator textend = input->end();
|
---|
| 822 | len = 0;
|
---|
| 823 | while ((len < maxlen) && (texthere != textend))
|
---|
| 824 | {
|
---|
| 825 | if (*texthere < 256) *uoutput = (unsigned char)(*texthere);
|
---|
| 826 | else {
|
---|
| 827 | // put a space or a question mark depending on what
|
---|
| 828 | // the character is. Question marks tell the user that
|
---|
| 829 | // they are missing some information.
|
---|
| 830 | if (is_unicode_space (*texthere)) *uoutput = ' ';
|
---|
| 831 | else *uoutput = '?';
|
---|
| 832 | }
|
---|
| 833 | ++uoutput;
|
---|
| 834 | ++len;
|
---|
| 835 | ++texthere;
|
---|
| 836 | }
|
---|
| 837 |
|
---|
| 838 | if (texthere == textend) status = finished;
|
---|
| 839 | else status = unfinished;
|
---|
| 840 | }
|
---|
| 841 |
|
---|
| 842 | // will convert the 16-bit string to a 8-bit stream
|
---|
| 843 | // and place the result in a text_t. This method uses
|
---|
| 844 | // the above convert function.
|
---|
| 845 | text_t outconvertclass::convert (const text_t &t) {
|
---|
| 846 | text_t out;
|
---|
| 847 | unsigned char cbuf[256];
|
---|
| 848 | size_t cbuflen = 0;
|
---|
| 849 | status_t status = unfinished;
|
---|
[8727] | 850 |
|
---|
| 851 | out.clear();
|
---|
| 852 | if (out.capacity() < t.size() + 2)
|
---|
| 853 | out.reserve(t.size() + 2);
|
---|
[1076] | 854 | setinput ((text_t *)&t); // discard constant
|
---|
| 855 | while (status == unfinished) {
|
---|
| 856 | convert ((char *)cbuf, 256, cbuflen, status);
|
---|
| 857 | out.appendcarr ((char *)cbuf, cbuflen);
|
---|
| 858 | }
|
---|
| 859 |
|
---|
| 860 | out.setencoding (1); // other encoding
|
---|
| 861 |
|
---|
| 862 | return out;
|
---|
| 863 | }
|
---|
| 864 |
|
---|
| 865 |
|
---|
| 866 | void outconvertclass::setostream (ostream *theouts)
|
---|
| 867 | {
|
---|
| 868 | outs = theouts;
|
---|
| 869 | }
|
---|
| 870 |
|
---|
| 871 | ostream *outconvertclass::getostream ()
|
---|
| 872 | {
|
---|
| 873 | return outs;
|
---|
| 874 | }
|
---|
| 875 |
|
---|
| 876 |
|
---|
| 877 |
|
---|
| 878 |
|
---|
| 879 | // an instance of the default outconvertclass to do simple
|
---|
| 880 | // conversions
|
---|
| 881 | outconvertclass text_t2ascii;
|
---|
| 882 |
|
---|
| 883 |
|
---|
| 884 |
|
---|
| 885 | // stream operators for the output class
|
---|
| 886 |
|
---|
| 887 | outconvertclass &operator<< (ostream &theouts, outconvertclass &outconverter)
|
---|
| 888 | {
|
---|
| 889 | outconverter.setostream(&theouts);
|
---|
| 890 | return outconverter;
|
---|
| 891 | }
|
---|
| 892 |
|
---|
| 893 |
|
---|
| 894 | #define STREAMBUFSIZE 256
|
---|
| 895 | outconvertclass &operator<< (outconvertclass &outconverter, const text_t &t)
|
---|
| 896 | {
|
---|
| 897 | ostream *outstream = outconverter.getostream();
|
---|
| 898 |
|
---|
| 899 | if (outstream == NULL) return outconverter;
|
---|
| 900 |
|
---|
| 901 | char outbuf[STREAMBUFSIZE];
|
---|
| 902 | size_t len;
|
---|
| 903 | outconvertclass::status_t status = outconvertclass::unfinished;
|
---|
| 904 |
|
---|
| 905 | // assume that there is no data needing converting
|
---|
| 906 | // left in the converter
|
---|
| 907 | outconverter.setinput ((text_t *)(&t)); // note the const -> nonconst conversion
|
---|
| 908 |
|
---|
| 909 | while (status == outconvertclass::unfinished)
|
---|
| 910 | {
|
---|
| 911 | outconverter.convert (outbuf, STREAMBUFSIZE, len, status);
|
---|
| 912 | if (len > 0) outstream->write(outbuf, len);
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| 913 | }
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| 914 |
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| 915 | return outconverter;
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| 916 | }
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