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Interpreter: extract_bracketed: fix indentation, minor tweaks
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Pragmatic Software
parent
d9c2c55efc
commit
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@ -346,8 +346,6 @@ sub extract_bracketed {
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@prefix_group = split //, $1;
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}
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#push @prefix_group, ' ' if $allow_whitespace;
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my @prefixes = split //, $optional_prefix;
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my @opens = split //, $open_bracket;
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my @closes = split //, $close_bracket;
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@ -370,139 +368,139 @@ sub extract_bracketed {
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my $bracket_pos;
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my $bracket_level = 0;
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my $ignore_quote = 0;
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my $prefix_group_match = @prefix_group ? 0 : 1;
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my $prefix_match = @prefixes ? 0 : 1;
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my $match = 0;
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my $prefix_group_match = @prefix_group ? 0 : 1;
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my $prefix_match = @prefixes ? 0 : 1;
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my $match = 0;
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my @chars = split //, $string;
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my @chars = split //, $string;
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my $state = 'prefixgroup';
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my $state = 'prefixgroup';
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while (1) {
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$last_ch = $ch;
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if ($i >= @chars) {
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if (defined $quote) {
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# reached end, but unbalanced quote... reset to beginning of quote and ignore it
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$i = $quote_pos;
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$ignore_quote = 1;
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$quote = undef;
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$last_ch = ' ';
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$token = '';
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} elsif ($extracting) {
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# reached end, but unbalanced brackets... reset to beginning and ignore them
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$i = $bracket_pos;
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$bracket_level = 0;
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$state = 'prefixgroup';
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$extracting = 0;
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$last_ch = ' ';
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$token = '';
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$result = '';
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} else {
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# add final token and exit
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$rest .= $token if $extracted;
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last;
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}
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}
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$ch = $chars[$i++];
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if ($escaped) {
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$token .= "\\$ch" if $extracting or $extracted;
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$escaped = 0;
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next;
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}
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if ($ch eq '\\') {
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$escaped = 1;
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next;
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}
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while (1) {
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$last_ch = $ch;
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if ($i >= @chars) {
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if (defined $quote) {
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if ($ch eq $quote) {
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# closing quote
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$token .= $ch if $extracting or $extracted;
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$result .= $token if $extracting;
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$rest .= $token if $extracted;
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$quote = undef;
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$token = '';
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} else {
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# still within quoted argument
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$token .= $ch if $extracting or $extracted;
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}
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next;
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# reached end, but unbalanced quote... reset to beginning of quote and ignore it
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$i = $quote_pos;
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$ignore_quote = 1;
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$quote = undef;
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$last_ch = ' ';
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$token = '';
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} elsif ($extracting) {
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# reached end, but unbalanced brackets... reset to beginning and ignore them
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$i = $bracket_pos;
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$bracket_level = 0;
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$state = 'prefixgroup';
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$extracting = 0;
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$last_ch = ' ';
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$token = '';
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$result = '';
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} else {
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# add final token and exit
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$rest .= $token if $extracted;
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last;
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}
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}
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if ($last_ch eq ' ' and not defined $quote and ($ch eq "'" or $ch eq '"')) {
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if ($ignore_quote) {
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# treat unbalanced quote as part of this argument
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$token .= $ch if $extracting or $extracted;
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$ignore_quote = 0;
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} else {
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# begin potential quoted argument
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$quote_pos = $i - 1;
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$quote = $ch;
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$token .= $ch if $extracting or $extracted;
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}
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next;
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$ch = $chars[$i++];
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if ($escaped) {
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$token .= "\\$ch" if $extracting or $extracted;
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$escaped = 0;
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next;
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}
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if ($ch eq '\\') {
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$escaped = 1;
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next;
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}
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if (defined $quote) {
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if ($ch eq $quote) {
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# closing quote
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$token .= $ch if $extracting or $extracted;
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$result .= $token if $extracting;
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$rest .= $token if $extracted;
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$quote = undef;
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$token = '';
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} else {
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# still within quoted argument
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$token .= $ch if $extracting or $extracted;
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}
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next;
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}
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if (not $extracted) {
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if ($state eq 'prefixgroup' and @prefix_group and not $extracting) {
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foreach my $prefix_ch (@prefix_group) {
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if ($ch eq $prefix_ch) {
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$prefix_group_match = 1;
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$state = 'prefixes';
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last;
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} else {
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$prefix_group_match = 0;
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}
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}
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next if $prefix_group_match;
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} elsif ($state eq 'prefixgroup' and not @prefix_group) {
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$state = 'prefixes';
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$prefix_index = 0;
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}
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if ($last_ch eq ' ' and not defined $quote and ($ch eq "'" or $ch eq '"')) {
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if ($ignore_quote) {
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# treat unbalanced quote as part of this argument
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$token .= $ch if $extracting or $extracted;
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$ignore_quote = 0;
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} else {
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# begin potential quoted argument
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$quote_pos = $i - 1;
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$quote = $ch;
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$token .= $ch if $extracting or $extracted;
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}
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next;
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}
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if ($state eq 'prefixes') {
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if (@prefixes and $ch eq $prefixes[$prefix_index]) {
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$token .= $ch if $extracting;
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$prefix_match = 1;
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$prefix_index++;
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$state = 'openbracket';
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next;
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} elsif ($state eq 'prefixes' and not @prefixes) {
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$state = 'openbracket';
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}
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}
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if ($state eq 'openbracket' and $prefix_group_match and $prefix_match) {
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$prefix_index = 0;
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if ($ch eq $opens[$open_index]) {
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$match = 1;
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$open_index++;
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if (not $extracted) {
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if ($state eq 'prefixgroup' and @prefix_group and not $extracting) {
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foreach my $prefix_ch (@prefix_group) {
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if ($ch eq $prefix_ch) {
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$prefix_group_match = 1;
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$state = 'prefixes';
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last;
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} else {
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if ($allow_whitespace and $ch eq ' ') {
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next;
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} else {
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$state = 'prefixgroup';
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next;
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}
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$prefix_group_match = 0;
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}
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}
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next if $prefix_group_match;
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} elsif ($state eq 'prefixgroup' and not @prefix_group) {
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$state = 'prefixes';
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$prefix_index = 0;
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}
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if ($match) {
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$state = 'prefixgroup';
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$prefix_group_match = 0 unless not @prefix_group;
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$prefix_match = 0 unless not @prefixes;
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$match = 0;
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$bracket_pos = $i if not $extracting;
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if ($open_index == @opens) {
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$extracting = 1;
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$token .= $ch if $bracket_level > 0;
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$bracket_level++;
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$open_index = 0;
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if ($state eq 'prefixes') {
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if (@prefixes and $ch eq $prefixes[$prefix_index]) {
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$token .= $ch if $extracting;
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$prefix_match = 1;
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$prefix_index++;
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$state = 'openbracket';
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next;
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} elsif ($state eq 'prefixes' and not @prefixes) {
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$state = 'openbracket';
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}
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}
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if ($extracting or ($state eq 'openbracket' and $prefix_group_match and $prefix_match)) {
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$prefix_index = 0;
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if ($ch eq $opens[$open_index]) {
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$match = 1;
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$open_index++;
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} else {
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if ($allow_whitespace and $ch eq ' ' and not $extracting) {
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next;
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} elsif (not $extracting) {
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$state = 'prefixgroup';
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next;
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}
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}
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}
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if ($match) {
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$state = 'prefixgroup';
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$prefix_group_match = 0 unless not @prefix_group;
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$prefix_match = 0 unless not @prefixes;
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$match = 0;
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$bracket_pos = $i if not $extracting;
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if ($open_index == @opens) {
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$extracting = 1;
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$token .= $ch if $bracket_level > 0;
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$bracket_level++;
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$open_index = 0;
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}
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next;
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} else {
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$open_index = 0;
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