json-format.pl: make it a streaming formatter
Always pretty-print.
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17331073a4
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@ -56,9 +56,15 @@ my $any_token = qr/\G(${\join '|', @all_pats})/;
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my $indent = 0;
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sub nexttoken ($) {
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my $ref = shift;
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return unless @$ref;
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my $text = shift @$ref;
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my $json = shift;
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if (!@$json) {
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return unless defined (my $line = <>);
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push @$json, $line =~ /$any_token/gsc;
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push @$json, substr $line, pos $line
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if pos $line != length $line;
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}
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my $text = shift @$json;
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if (my $s = $lookup{$text}) {
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return $s, $text;
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}
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@ -68,6 +74,15 @@ sub nexttoken ($) {
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return 'ERROR', $text;
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}
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sub skip_ws ($) {
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my $json = shift;
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while (my ($token, $text) = nexttoken $json) {
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next if $token eq 'WS';
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return $token, $text;
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}
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return;
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}
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sub printindent () {
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print "\n";
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print ' ' x $indent;
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@ -78,7 +93,7 @@ sub do_object ($) {
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my $json = shift;
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my $in_field_name = 1;
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my $first = 1;
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while (my ($token, $text) = nexttoken $json) {
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while (my ($token, $text) = skip_ws $json) {
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if ($token eq 'COLON') {
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$in_field_name = 0;
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} elsif ($token eq 'COMMA') {
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@ -101,7 +116,7 @@ sub do_object ($) {
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sub do_array ($) {
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my $json = shift;
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my $first = 1;
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while (my ($token, $text) = nexttoken $json) {
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while (my ($token, $text) = skip_ws $json) {
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if ($token eq 'RBRACKET') {
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$indent--;
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printindent;
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@ -134,16 +149,8 @@ sub do_value ($$$) {
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}
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}
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while (<>) {
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# FIXME: this way it doesn't work with pre-formatted JSON
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my $json = $_;
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my @matches = $json =~ /$any_token/gsc;
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push @matches, substr $json, pos $json
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if pos $json != length $json;
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while (my ($token, $text) = nexttoken \@matches) {
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next if $token eq 'WS';
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do_value $token, $text, \@matches;
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my @buffer;
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while (my ($token, $text) = skip_ws \@buffer) {
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do_value $token, $text, \@buffer;
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}
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print "\n";
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}
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