/[stem-hr]/stem-hr.pl
This is repository of my old source code which isn't updated any more. Go to git.rot13.org for current projects!
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Contents of /stem-hr.pl

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Revision 4 - (show annotations)
Sat Feb 26 00:37:18 2005 UTC (19 years, 1 month ago) by dpavlin
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1 #!/usr/bin/perl -w
2 #
3 # Croatian stemmer
4 #
5
6 # promjenjive:
7 # - imenice
8 # - pridjevi
9 # - brojevi
10 # - zamjenice
11 # - prilozi
12 # - glagoli
13 #
14 # nepromjenjive:
15 # - prijedlozi
16 # - veznici
17 # - èestice
18 # - uzvici
19 #
20
21 use strict;
22
23 sub kgh {
24 my ($pre,$replace,$post) = @_;
25 $replace =~ s/[cè]/k/g;
26 $replace =~ s/[z¾]/g/g;
27 $replace =~ s/[s¹]/h/g;
28 return $pre . $replace . $post;
29 }
30
31 # samoglasnici
32 my $sa = '[aeiou]';
33 # suglasnici
34 my $su = '[^aeiou]';
35
36 my %rules;
37 my %stem_words;
38 my $words = 0;
39 my $stems = 0;
40
41 while(<>) {
42 chomp;
43 if (/^$/) {
44 print "\n";
45 next;
46 }
47
48 $words++;
49
50 my $orig = $_;
51
52 # imenice
53 # vrsta a
54
55 unless (
56 # kgh
57 s/(${sa})([è¾¹czs])(i|e|ima)$/kgh($1,$2,' 1')/gex ||
58 s/(${sa}[kgh])(a|u|om)$/$1 2/g ||
59 s/(${su})([è¾¹czs])(i|e|ima)$/kgh($1,"a$2",' 3')/gex ||
60 # nepostojano a
61 s/(${su}a{$su})a/$1 4/g ||
62 s/(${su})(${su})(a|u|i|e|om|ima)$/$1a$2 5/g
63 ) {
64
65 # mno¾ina
66 s/(${su})(ov|ev)*(i|a|ima|e|in|ina)$/$1 6/g;
67 # jednina
68 s/(o|e|a|u|om|em)$/ 7/g;
69 }
70
71 if (s/^(.+)\s(\d+)$/$1\t$2/g) {
72 $rules{$2}++;
73 $stems++;
74 $stem_words{$1}++;
75 }
76
77 printf("%-15s %s\n",$orig,$_);
78
79 }
80 my $nr_stems = keys(%stem_words);
81 printf "\n# %d words, %d stems in %d ops, %.2f%% size\n",$words,$nr_stems,$stems,($nr_stems*100/$words);
82
83 foreach my $s (keys %stem_words) {
84 print "#stem $stem_words{$s} $s\n";
85 }
86
87 foreach my $r (keys %rules) {
88 print "#rule $rules{$r} $r\n";
89 }

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