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#!/usr/bin/perl -w |
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# |
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# Croatian stemmer |
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# |
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|
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# promjenjive: |
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# - imenice |
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# - pridjevi |
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# - brojevi |
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# - zamjenice |
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# - prilozi |
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# - glagoli |
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# |
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# nepromjenjive: |
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# - prijedlozi |
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# - veznici |
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# - èestice |
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# - uzvici |
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# |
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|
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use strict; |
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|
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sub kgh { |
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my ($pre,$replace,$post) = @_; |
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$replace =~ s/[cè]/k/g; |
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$replace =~ s/[z¾]/g/g; |
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$replace =~ s/[s¹]/h/g; |
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return $pre . $replace . $post; |
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} |
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|
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# samoglasnici |
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my $sa = '[aeiou]'; |
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# suglasnici |
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my $su = '[^aeiou]'; |
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|
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my $palatal = '(lj|nj|j|æ|¾|¹|¾|¹t|¾d)'; |
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|
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my %rules; |
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my %stem_words; |
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my $words = 0; |
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my $stems = 0; |
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|
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|
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my $last_stem = ''; |
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sub check_stem { |
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my $s = shift || return; |
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if ($last_stem) { |
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print "ERROR==> " if ($last_stem ne $s); |
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} else { |
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$last_stem = $s; |
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} |
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} |
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|
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while(<>) { |
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chomp; |
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next if (/^#/); |
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if (/^$/) { |
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print "\n"; |
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$last_stem = ''; |
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next; |
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} |
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|
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$words++; |
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|
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my $orig = $_; |
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|
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# imenice |
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|
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unless ( |
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# vrsta a |
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s/(${su}st)a$/$1 13/g || |
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s/(${su})c[ae]$/$1ce 17/g || |
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# kgh |
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s/(${sa})([è¾¹czs])(i|e|ima)$/kgh($1,$2,' 1')/gex || |
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s/(${sa}[kgh])(a|u|om)$/$1 2/g || |
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s/(${su})([è¾¹czs])(i|e|ima)$/kgh($1,"a$2",' 3')/gex || |
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# imenice na palatal |
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s/${palatal}${palatal}(a|u|em|i|ima|e)$/$1a$2 9/g || |
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s/${palatal}(a|u|em)$/$1 8/g || |
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# nepostojano a |
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s/(${su}a{$su})a/$1 4/g || |
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s/(${su})(${su})(a|u|i|e|om|ima)$/$1a$2 5/g |
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) { |
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|
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# vrsta a |
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s/me$/me 11/g || |
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s/(eta|ena)$/e 12/g || |
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s/(${sa}${su})(o|e|a|u|om|em|i|ima|ina)$/$1 7/g || |
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|
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s/(${su})sa$/$1as 14/g || |
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s/(${su})ena$/$1e 16/g || |
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s/(${su})eta$/$1e 17/g || |
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s/(${su})([oe])$/$1-$2 18/g || |
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|
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# mno¾ina |
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s/(${su})(ov|ev)*(i|a|ima|e|in|ina|eta)$/$1 6/g; |
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} |
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|
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if (s/^(.+)\s(\d+)$/$1\t$2/g) { |
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$rules{$2}++; |
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$stems++; |
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$stem_words{$1}++; |
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check_stem($1); |
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} else { |
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$last_stem = $_; |
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} |
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|
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printf("%-15s %s\n",$orig,$_); |
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|
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} |
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my $nr_stems = keys(%stem_words); |
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printf "\n# %d words, %d stems in %d ops, %.2f%% size\n",$words,$nr_stems,$stems,($nr_stems*100/$words); |
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|
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foreach my $s (keys %stem_words) { |
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print "#stem $stem_words{$s} $s\n"; |
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} |
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|
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foreach my $r (sort keys %rules) { |
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print "#rule $rules{$r} $r\n"; |
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} |
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