2009-01-16 07:09:18 +00:00
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#$Id$
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2009-01-07 19:57:51 +00:00
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#!/usr/bin/perl
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# This script extracts the ASN1 definition from and TS 36.331 and generates 3 output files that can be processed by asn2wrs
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# First download the specification from 3gpp.org as a word document and open it
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# Then in "view" menu, select normal or web layout (needed to removed page header and footers)
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# Finally save the document as a text file
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# Call the script: "perl extract_asn1 36331-xxx.txt"
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# It should generate: EUTRA-RRC-Definitions.asn, EUTRA-UE-Variables.asn and EUTRA-InterNodeDefinitions
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use warnings;
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$input_file = $ARGV[0];
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$def_output_file = "EUTRA-RRC-Definitions.asn";
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$var_output_file = "EUTRA-UE-Variables.asn";
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$internode_output_file = "EUTRA-InterNodeDefinitions.asn";
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sub extract_asn1;
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open(INPUT_FILE, "< $input_file") or die "Can not open file $input_file";
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while (<INPUT_FILE>) {
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# Process the EUTRA-RRC-Definitions section
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if( m/EUTRA-RRC-Definitions DEFINITIONS AUTOMATIC TAGS ::=/){
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open(OUTPUT_FILE, "> $def_output_file") or die "Can not open file $def_output_file";
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syswrite OUTPUT_FILE,"$_ \n";
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syswrite OUTPUT_FILE,"BEGIN\n\n";
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# Get all the text delimited by -- ASN1START and -- ASN1STOP
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extract_asn1();
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syswrite OUTPUT_FILE,"END\n\n";
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close(OUTPUT_FILE);
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}
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# Process the EUTRA-RRC-Variables section
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if( m/EUTRA-UE-Variables DEFINITIONS AUTOMATIC TAGS ::=/){
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open(OUTPUT_FILE, "> $var_output_file") or die "Can not open file $def_output_file";
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syswrite OUTPUT_FILE,"$_ \n";
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syswrite OUTPUT_FILE,"BEGIN\n\n";
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# Get all the text delimited by -- ASN1START and -- ASN1STOP
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extract_asn1();
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syswrite OUTPUT_FILE,"END\n\n";
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close(OUTPUT_FILE);
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}
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# Process the EUTRA-InterNodeDefinitions section
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if( m/EUTRA-InterNodeDefinitions DEFINITIONS AUTOMATIC TAGS ::=/){
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open(OUTPUT_FILE, "> $internode_output_file") or die "Can not open file $def_output_file";
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syswrite OUTPUT_FILE,"$_ \n";
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syswrite OUTPUT_FILE,"BEGIN\n\n";
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# Get all the text delimited by -- ASN1START and -- ASN1STOP
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extract_asn1();
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syswrite OUTPUT_FILE,"END\n\n";
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close(OUTPUT_FILE);
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}
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}
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close(INPUT_FILE);
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# This subroutine copies the text delimited by -- ASN1START and -- ASN1STOP in INPUT_FILE
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# and copies it into OUTPUT_FILE.
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# It stops when it meets the keyword "END"
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sub extract_asn1 {
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my $line = <INPUT_FILE>;
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my $is_asn1 = 0;
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while(($line ne "END\n") && ($line ne "END\r\n")){
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if ($line =~ m/-- ASN1STOP/) {
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$is_asn1 = 0;
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}
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if ($is_asn1 == 1){
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syswrite OUTPUT_FILE,"$line";
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}
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if ($line =~ m/-- ASN1START/) {
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$is_asn1 = 1;
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}
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$line = <INPUT_FILE>;
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}
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}
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