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|
#! /usr/bin/perl
# This is a skeleton of a perl script for processing the output of
# sgmls. You must change the parts marked with "XXX".
# XXX This is for troff: in data, turn \ into \e (which prints as \).
# Backslashes in SDATA entities are left as backslashes.
$backslash_in_data = "\\e";
$prog = $0;
$prog =~ s|.*/||;
$level = 0;
while (<STDIN>) {
chop;
$command = substr($_, 0, 1);
substr($_, 0, 1) = "";
if ($command eq '(') {
&start_element($_);
$level++;
}
elsif ($command eq ')') {
$level--;
&end_element($_);
foreach $key (keys %attribute_value) {
@splitkey = split($;, $key);
if ($splitkey[0] == $level) {
delete $attribute_value{$key};
delete $attribute_type{$key};
}
}
}
elsif ($command eq '-') {
&unescape_data($_);
&data($_);
}
elsif ($command eq 'A') {
@field = split(/ /, $_, 3);
$attribute_type{$level,$field[0]} = $field[1];
&unescape_data($field[2]);
$attribute_value{$level,$field[0]} = $field[2];
}
elsif ($command eq '&') {
&entity($_);
}
elsif ($command eq 'D') {
@field = split(/ /, $_, 4);
$data_attribute_type{$field[0], $field[1]} = $field[2];
&unescape_data($field[3]);
$data_attribute_value{$field[0], $field[1]} = $field[3];
}
elsif ($command eq 'N') {
$notation{$_} = 1;
if (defined($sysid)) {
$notation_sysid{$_} = $sysid;
undef($sysid);
}
if (defined($pubid)) {
$notation_pubid{$_} = $pubid;
undef($pubid);
}
}
elsif ($command eq 'I') {
@field = split(/ /, $_, 3);
$entity_type{$field[0]} = $field[1];
&unescape($field[2]);
# You may want to substitute \e for \ if the type is CDATA.
$entity_text{$field[0]} = $field[2];
$entity_code{$field[0]} = 'I';
}
elsif ($command eq 'E') {
@field = split(/ /, $_);
$entity_code{$field[0]} = 'E';
$entity_type{$field[0]} = $field[1];
$entity_notation{$field[0]} = $field[2];
if (defined(@files)) {
foreach $i (0..$#files) {
$entity_filename{$field[0], $i} = $files[i];
}
undef(@files);
}
if (defined($sysid)) {
$entity_sysid{$field[0]} = $sysid;
undef($sysid);
}
if (defined($pubid)) {
$entity_pubid{$field[0]} = $pubid;
undef($pubid);
}
}
elsif ($command eq 'S') {
$entity_code{$_} = 'S';
if (defined(@files)) {
foreach $i (0..$#files) {
$entity_filename{$_, $i} = $files[i];
}
undef(@files);
}
if (defined($sysid)) {
$entity_sysid{$_} = $sysid;
undef($sysid);
}
if (defined($pubid)) {
$entity_pubid{$_} = $pubid;
undef($pubid);
}
}
elsif ($command eq '?') {
&unescape($_);
&pi($_);
}
elsif ($command eq 'L') {
@field = split(/ /, $_);
$lineno = $field[0];
if ($#field >= 1) {
&unescape($field[1]);
$filename = $field[1];
}
}
elsif ($command eq 'V') {
@field = split(/ /, $_, 2);
&unescape($field[1]);
$environment{$field[0]} = $field[1];
}
elsif ($command eq '{') {
&start_subdoc($_);
}
elsif ($command eq '}') {
&end_subdoc($_);
}
elsif ($command eq 'f') {
&unescape($_);
push(@files, $_);
}
elsif ($command eq 'p') {
&unescape($_);
$pubid = $_;
}
elsif ($command eq 's') {
&unescape($_);
$sysid = $_;
}
elsif ($command eq 'C') {
$conforming = 1;
}
else {
warn "$prog:$ARGV:$.: unrecognized command \`$command'\n";
}
}
sub unescape {
$_[0] =~ s/\\([0-7][0-7]?[0-7]?|.)/&esc($1)/eg;
}
sub esc {
local($_) = $_[0];
if ($_ eq '012' || $_ eq '12') {
""; # ignore RS
}
elsif (/^[0-7]/) {
sprintf("%c", oct);
}
elsif ($_ eq 'n') {
"\n";
}
elsif ($_ eq '|') {
"";
}
elsif ($_ eq "\\") {
"\\";
}
else {
$_;
}
}
sub unescape_data {
local($sdata) = 0;
$_[0] =~ s/\\([0-7][0-7]?[0-7]?|.)/&esc_data($1)/eg;
}
sub esc_data {
local($_) = $_[0];
if ($_ eq '012' || $_ eq '12') {
""; # ignore RS
}
elsif (/^[0-7]/) {
sprintf("%c", oct);
}
elsif ($_ eq 'n') {
"\n";
}
elsif ($_ eq '|') {
$sdata = !$sdata;
"";
}
elsif ($_ eq "\\") {
$sdata ? "\\" : $backslash_in_data;
}
else {
$_;
}
}
sub start_element {
local($gi) = $_[0];
# XXX
}
sub end_element {
local($gi) = $_[0];
# XXX
}
sub data {
local($data) = $_[0];
# XXX
}
# A processing instruction.
sub pi {
local($data) = $_[0];
# XXX
}
# A reference to an external entity.
sub entity {
local($name) = $_[0];
# XXX
}
sub start_subdoc {
local($name) = $_[0];
# XXX
}
sub end_subdoc {
local($name) = $_[0];
# XXX
}
|
