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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