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1#! /usr/bin/perl
2
3# A script to scan PCRE2's man pages to check for typos in the control
4# sequences. I use only a small set of the available repertoire, so it is
5# straightforward to check that nothing else has slipped in by mistake. This
6# script should be called in the doc directory.
7
8$yield = 0;
9
10while (scalar(@ARGV) > 0)
11  {
12  $line = 0;
13  $file = shift @ARGV;
14
15  open (IN, $file) || die "Failed to open $file\n";
16
17  while (<IN>)
18    {
19    $line++;
20    if (/^\s*$/)
21      {
22      printf "Empty line $line of $file\n";
23      $yield = 1;
24      }
25    elsif (/^\./)
26      {
27      if (!/^\.\s*$|
28            ^\.B\s+\S|
29            ^\.TH\s\S|
30            ^\.SH\s\S|
31            ^\.SS\s\S|
32            ^\.TP(?:\s?\d+)?\s*$|
33            ^\.SM\s*$|
34            ^\.br\s*$|
35            ^\.rs\s*$|
36            ^\.sp\s*$|
37            ^\.nf\s*$|
38            ^\.fi\s*$|
39            ^\.P\s*$|
40            ^\.PP\s*$|
41            ^\.\\"(?:\ HREF)?\s*$|
42            ^\.\\"\sHTML\s<a\shref="[^"]+?">\s*$|
43            ^\.\\"\sHTML\s<a\sname="[^"]+?"><\/a>\s*$|
44            ^\.\\"\s<\/a>\s*$|
45            ^\.\\"\sJOINSH\s*$|
46            ^\.\\"\sJOIN\s*$/x
47         )
48        {
49        printf "Bad control line $line of $file\n";
50        $yield = 1;
51        }
52      }
53    else
54      {
55      if (/\\[^ef]|\\f[^IBP]/)
56        {
57        printf "Bad backslash in line $line of $file\n";
58        $yield = 1;
59        }
60      }
61    }
62
63  close(IN);
64  }
65
66exit $yield;
67# End
68