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235 lines
6.2 KiB
Perl
Executable File
235 lines
6.2 KiB
Perl
Executable File
#!/usr/bin/perl
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# This Source Code Form is subject to the terms of the Mozilla Public
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# License, v. 2.0. If a copy of the MPL was not distributed with this
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# file, You can obtain one at http://mozilla.org/MPL/2.0/.
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use warnings;
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use strict;
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my $debug = 0;
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# for paragraphs
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my $USER_SPECIFIED = 1;
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my $RESULTS_SPECIFIED = 2;
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my $search = join ' ', @ARGV;
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if (not length $search) {
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print "Usage: c99std [-list] [-n#] [-section <section>] [search text] -- 'section' must be in the form of X.YpZ where X and Y are section/chapter and, optionally, pZ is paragraph. If both 'section' and 'search text' are specified, then the search space will be within the specified section. You may use -n # to skip to the #th match. To list only the section numbers containing 'search text', add -list.\n";
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exit 0;
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}
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my ($section, $paragraph, $section_specified, $paragraph_specified, $match, $list_only, $list_titles);
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$section_specified = 0;
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$paragraph_specified = 0;
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if ($search =~ s/-section\s*([A-Z0-9\.p]+)//i or $search =~ s/\b([A-Z0-9]+\.[0-9\.p]+)//i) {
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$section = $1;
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if ($section =~ s/p(\d+)//i) {
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$paragraph = $1;
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$paragraph_specified = $USER_SPECIFIED;
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} else {
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$paragraph = 1;
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}
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$section = "$section." if $section =~ m/^[A-Z0-9]+$/i;
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$section_specified = 1;
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}
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if ($search =~ s/-n\s*(\d+)//) {
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$match = $1;
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} else {
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$match = 1;
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}
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if ($search =~ s/-list//i) {
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$list_only = 1;
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$list_titles = 1; # Added here instead of removing -titles option
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}
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if ($search =~ s/-titles//i) {
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$list_only = 1;
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$list_titles = 1;
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}
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$search =~ s/^\s+//;
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$search =~ s/\s+$//;
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if (not defined $section) {
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$section = "1.";
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$paragraph = 1;
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}
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if ($list_only and not length $search) {
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print "You must specify some search text to use with -list.\n";
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exit 0;
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}
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open FH, "<n1256.out" or die "Could not open n1256: $!";
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my @contents = <FH>;
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close FH;
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my $text = join '', @contents;
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$text =~ s/\r//g;
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my $result;
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my $found_section = "";
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my $found_section_title = "";
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my $section_title;
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my $found_paragraph;
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my $found = 0;
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my $matches = 0;
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my $this_section;
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my $comma = "";
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if ($list_only) {
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$result = "Sections containing '$search':\n ";
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}
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my $qsearch = quotemeta $search;
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$qsearch =~ s/\\ / /g;
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$qsearch =~ s/\s+/\\s+/g;
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while ($text =~ m/^\s{0,4}([0-9A-Z]+\.[0-9\.]*)/msg) {
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$this_section = $1;
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print "----------------------------------\n" if $debug >= 2;
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print "Processing section [$this_section]\n" if $debug;
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if ($section_specified and $this_section !~ m/^$section/i) {
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print "No section match, skipping.\n" if $debug >= 4;
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next;
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}
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my $section_text;
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if ($text =~ m/(.*?)^(?=\s{0,4}(?!FOOTNOTE)[0-9A-Z]+\.)/msg) {
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$section_text = $1;
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} else {
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print "No section text, end of file marker found.\n" if $debug >= 4;
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last;
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}
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if ($section =~ /FOOTNOTE/i) {
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$section_text =~ s/^\s{4}//ms;
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$section_text =~ s/^\s{4}FOOTNOTE.*//msi;
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$section_text =~ s/^\d.*//ms;
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} elsif ($section_text =~ m/(.*?)$/msg) {
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$section_title = $1 if length $1;
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$section_title =~ s/^\s+//;
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$section_title =~ s/\s+$//;
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}
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print "$this_section [$section_title]\n" if $debug >= 2;
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while ($section_text =~ m/^(\d+)\s(.*?)^(?=\d)/msgic or $section_text =~ m/^(\d+)\s(.*)/msgi) {
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my $p = $1 ;
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my $t = $2;
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print "paragraph $p: [$t]\n" if $debug >= 3;
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if ($paragraph_specified == $USER_SPECIFIED and not length $search and $p == $paragraph) {
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$result = $t if not $found;
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$found_paragraph = $p;
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$found_section = $this_section;
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$found_section_title = $section_title;
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$found = 1;
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last;
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}
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if (length $search) {
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eval {
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if ($t =~ m/\b$qsearch\b/mis or $section_title =~ m/\b$qsearch\b/mis) {
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$matches++;
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if ($matches >= $match) {
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if ($list_only) {
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$result .= sprintf("%s%-15s", $comma, $this_section."p".$p);
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$result .= " $section_title" if $list_titles;
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$comma = ",\n ";
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} else {
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if (not $found) {
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$result = $t;
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$found_section = $this_section;
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$found_section_title = $section_title;
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$found_paragraph = $p;
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$paragraph_specified = $RESULTS_SPECIFIED;
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}
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$found = 1;
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}
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}
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}
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};
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if ($@) {
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print "Error in search regex; you may need to escape characters such as *, ?, ., etc.\n";
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exit 0;
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}
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}
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}
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last if $found && $paragraph_specified == $USER_SPECIFIED;
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if ($paragraph_specified == $USER_SPECIFIED) {
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if (length $search) {
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print "No such text '$search' found within paragraph $paragraph of section $section of n1256.\n";
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} else {
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print "No such paragraph $paragraph in section $section of n1256.\n";
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}
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exit 0;
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}
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if (defined $section_specified and not length $search) {
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$found = 1;
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$found_section = $this_section;
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$found_section_title = $section_title;
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$found_paragraph = $paragraph;
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$result = $section_text;
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last;
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}
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}
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if (not $found and $comma eq "") {
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$search =~ s/\\s\+/ /g;
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if ($section_specified) {
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print "No such text '$search' found within section '$section' in C99 Draft Standard (n1256).\n" if length $search;
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print "No such section '$section' in C99 Draft Standard (n1256).\n" if not length $search;
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exit 0;
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}
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print "No such section '$section' in C99 Draft Standard (n1256).\n" if not length $search;
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print "No such text '$search' found in C99 Draft Standard (n1256).\n" if length $search;
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exit 0;
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}
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$result =~ s/$found_section_title// if length $found_section_title;
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$result =~ s/^\s+//;
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$result =~ s/\s+$//;
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=cut
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$result =~ s/\s+/ /g;
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$result =~ s/[\n\r]/ /g;
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=cut
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if ($matches > 1 and not $list_only) {
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print "Displaying $match of $matches matches: ";
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}
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if ($comma eq "") {
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print "http://www.iso-9899.info/n1256.html\#$found_section";
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print "p" . $found_paragraph if $paragraph_specified;
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print "\n\n";
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print "[", $found_section_title, "]\n\n" if length $found_section_title;
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}
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$result =~ s/\s*Constraints\s*$//;
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$result =~ s/\s*Semantics\s*$//;
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$result =~ s/\s*Description\s*$//;
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$result =~ s/\s*Returns\s*$//;
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$result =~ s/\s*Runtime-constraints\s*$//;
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$result =~ s/\s*Recommended practice\s*$//;
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print "$result\n";
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