[3365] | 1 | /**************************************************************************
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| 2 | *
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| 3 | * words.cpp -- Functions for parsing out words from the source text
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| 4 | * Copyright (C) 1999 Rodger McNab
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| 5 | *
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| 6 | * This program is free software; you can redistribute it and/or modify
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| 7 | * it under the terms of the GNU General Public License as published by
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| 8 | * the Free Software Foundation; either version 2 of the License, or
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| 9 | * (at your option) any later version.
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| 10 | *
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| 11 | * This program is distributed in the hope that it will be useful,
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| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of
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| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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| 14 | * GNU General Public License for more details.
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| 15 | *
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| 16 | * You should have received a copy of the GNU General Public License
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| 17 | * along with this program; if not, write to the Free Software
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| 18 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
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| 19 | *
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| 20 | **************************************************************************/
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| 21 |
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| 22 | // need this to avoid bizarre compiler problems under VC++ 6.0
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| 23 | #if defined (__WIN32__) && !defined (GSDL_USE_IOS_H)
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| 24 | # include <iostream>
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| 25 | #endif
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| 26 |
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| 27 | #include "words.h"
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| 28 |
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| 29 |
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| 30 | /* Takes the place of the old INAWORD macro. It determines
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| 31 | whether a given place in a UTF-8 encoded Unicode string
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| 32 | is part of a word. */
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| 33 | int inaword (const u_char *here, const u_char *end) {
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| 34 | unsigned short c;
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| 35 | if (parse_utf8_char(here, end, &c) > 0) return is_unicode_letdig (c);
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| 36 | return 0;
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| 37 | }
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| 38 |
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| 39 | const unsigned char *ParseIndexWord (const unsigned char *textHere,
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| 40 | const unsigned char *textEnd,
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| 41 | UCArray &word) {
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| 42 | word.erase (word.begin(), word.end());
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| 43 |
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| 44 | register int charlength = 0;
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| 45 | register int length = 0;
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| 46 | register int numeric = 0;
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| 47 | unsigned short c;
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| 48 |
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| 49 | charlength = parse_utf8_char (textHere, textEnd, &c);
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| 50 |
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| 51 | while (length+charlength <= MAXSTEMLEN && charlength > 0 &&
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| 52 | (is_unicode_letter(c) || (is_unicode_digit(c) &&
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| 53 | ++numeric <= MAXNUMERIC))) {
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| 54 | while (charlength-- > 0) {
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| 55 | word.push_back (*textHere++); length++;
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| 56 | }
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| 57 | charlength = parse_utf8_char (textHere, textEnd, &c);
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| 58 | }
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| 59 |
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| 60 | return textHere;
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| 61 | }
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| 62 |
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| 63 | const unsigned char *ParseIndexMGWord (const unsigned char *textHere,
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| 64 | const unsigned char *textEnd,
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| 65 | unsigned char *mgWord) {
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| 66 | register int charlength = 0;
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| 67 | register int length = 0;
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| 68 | register int numeric = 0;
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| 69 | unsigned short c;
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| 70 |
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| 71 | charlength = parse_utf8_char (textHere, textEnd, &c);
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| 72 |
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| 73 | while (length+charlength <= MAXSTEMLEN && charlength > 0 &&
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| 74 | (is_unicode_letter(c) || (is_unicode_digit(c) &&
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| 75 | ++numeric <= MAXNUMERIC))) {
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| 76 | while (charlength-- > 0) {
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| 77 | mgWord[++length] = *textHere++;
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| 78 | }
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| 79 | charlength = parse_utf8_char (textHere, textEnd, &c);
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| 80 | }
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| 81 |
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| 82 | mgWord[0] = length;
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| 83 |
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| 84 | return textHere;
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| 85 | }
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| 86 |
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| 87 | const unsigned char *ParseNonindexWord (const unsigned char *textHere,
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| 88 | const unsigned char *textEnd) {
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| 89 | register int charlength = 0;
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| 90 | unsigned short c;
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| 91 |
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| 92 | charlength = parse_utf8_char(textHere, textEnd, &c);
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| 93 |
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| 94 | while (charlength > 0 && !is_unicode_letdig(c)) {
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| 95 | textHere += charlength;
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| 96 | charlength = parse_utf8_char (textHere, textEnd, &c);
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| 97 | }
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| 98 |
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| 99 | return textHere;
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| 100 | }
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