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Scripts/utils/apply_map.pl
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#!/usr/bin/perl -w
# Copyright 2012 Johns Hopkins University (Author: Daniel Povey)
# Apache 2.0.
# This program is a bit like ./sym2int.pl in that it applies a map
# to things in a file, but it's a bit more general in that it doesn't
# assume the things being mapped to are single tokens, they could
# be sequences of tokens. See the usage message.
if (@ARGV > 0 && $ARGV[0] eq "-f") {
shift @ARGV;
$field_spec = shift @ARGV;
if ($field_spec =~ m/^\d+$/) {
$field_begin = $field_spec - 1; $field_end = $field_spec - 1;
}
if ($field_spec =~ m/^(\d*)[-:](\d*)/) { # accept e.g. 1:10 as a courtesty (properly, 1-10)
if ($1 ne "") {
$field_begin = $1 - 1; # Change to zero-based indexing.
}
if ($2 ne "") {
$field_end = $2 - 1; # Change to zero-based indexing.
}
}
if (!defined $field_begin && !defined $field_end) {
die "Bad argument to -f option: $field_spec";
}
}
# Mapping is obligatory
$permissive = 0;
if (@ARGV > 0 && $ARGV[0] eq '--permissive') {
shift @ARGV;
# Mapping is optional (missing key is printed to output)
$permissive = 1;
}
if(@ARGV != 1) {
print STDERR "Usage: apply_map.pl [options] map <input >output
" .
"options: [-f <field-range> ]
" .
"Applies the map 'map' to all input text, where each line of the map
" .
"is interpreted as a map from the first field to the list of the other fields
" .
"Note: <field-range> can look like 4-5, or 4-, or 5-, or 1, it means the field
" .
"range in the input to apply the map to.
" .
"e.g.: echo A B | apply_map.pl a.txt
" .
"where a.txt is:
" .
"A a1 a2
" .
"B b
" .
"will produce:
" .
"a1 a2 b
";
exit(1);
}
($map) = @ARGV;
open(M, "<$map") || die "Error opening map file $map: $!";
while (<M>) {
@A = split(" ", $_);
@A >= 1 || die "apply_map.pl: empty line.";
$i = shift @A;
$o = join(" ", @A);
$map{$i} = $o;
}
while(<STDIN>) {
@A = split(" ", $_);
for ($x = 0; $x < @A; $x++) {
if ( (!defined $field_begin || $x >= $field_begin)
&& (!defined $field_end || $x <= $field_end)) {
$a = $A[$x];
if (!defined $map{$a}) {
if (!$permissive) {
die "apply_map.pl: undefined key $a
";
} else {
print STDERR "apply_map.pl: warning! missing key $a
";
}
} else {
$A[$x] = $map{$a};
}
}
}
print join(" ", @A) . "
";
}
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