Merge find-undoc-api into find-doc-nits

Use \b on NOEXIST and EXPORT_VAR_AS_FUNC patterns as suggested by Andy.
Reviewed-by: NAndy Polyakov <appro@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/1912)

util/find-doc-nits.pl

@@ -13,9 +13,28 @@ use strict;
 use Pod::Checker;
 use File::Find;
 use File::Basename;
+use File::Spec::Functions;
 use Getopt::Std;
+use lib catdir(dirname($0), "perl");
+use OpenSSL::Util::Pod;
 
+# Options.
 our($opt_s);
+our($opt_u);
+our($opt_h);
+our($opt_n);
+
+sub help()
+{
+    print <<EOF;
+Find small errors (nits) in documentation.  Options:
+    -n Print nits in POD pages
+    -s Also print missing sections in POD pages (implies -n)
+    -u List undocumented functions
+    -h Print this help message
+EOF
+    exit;
+}
 
 my $temp = '/tmp/docnits.txt';
 my $OUT;
@@ -173,10 +192,83 @@ sub check()
     unlink $temp || warn "Can't remove $temp, $!";
 }
 
-getopts('s');
+my %dups;
+
+sub parsenum()
+{
+    my $file = shift;
+    my @apis;
+
+    open my $IN, '<', $file
+        or die "Can't open $file, $!, stopped";
+
+    while ( <$IN> ) {
+        next if /\bNOEXIST\b/;
+        next if /\bEXPORT_VAR_AS_FUNC\b/;
+        push @apis, $1 if /([^\s]+).\s/;
+    }
+
+    close $IN;
+
+    print "# Found ", scalar(@apis), " in $file\n";
+    return sort @apis;
+}
+
+sub getdocced()
+{
+    my $dir = shift;
+    my %return;
+
+    foreach my $pod ( glob("$dir/*.pod") ) {
+        my %podinfo = extract_pod_info($pod);
+        foreach my $n ( @{$podinfo{names}} ) {
+            $return{$n} = $pod;
+            print "# Duplicate $n in $pod and $dups{$n}\n"
+                if defined $dups{$n} && $dups{$n} ne $pod;
+            $dups{$n} = $pod;
+        }
+    }
+
+    return %return;
+}
+
+my %docced;
+
+sub printem()
+{
+    my $libname = shift;
+    my $numfile = shift;
+    my $count = 0;
+
+    foreach my $func ( &parsenum($numfile) ) {
+        next if $docced{$func};
+
+        # Skip ASN1 utilities
+        next if $func =~ /^ASN1_/;
+
+        print "$libname:$func\n";
+        $count++;
+    }
+    print "# Found $count missing from $numfile\n\n";
+}
+
+
+getopts('nshu');
 
-foreach (@ARGV ? @ARGV : glob('doc/*/*.pod')) {
-    &check($_);
+&help() if ( $opt_h );
+
+if ( $opt_n or $opt_s ) {
+    foreach (@ARGV ? @ARGV : glob('doc/*/*.pod')) {
+        &check($_);
+    }
+}
+if ( $opt_u ) {
+    my %temp = &getdocced('doc/man3');
+    foreach ( keys %temp ) {
+        $docced{$_} = $temp{$_};
+    }
+    &printem('crypto', 'util/libcrypto.num');
+    &printem('ssl', 'util/libssl.num');
 }
 
 exit;

util/find-undoc-api.pl

-#! /usr/bin/env perl
-# Copyright 2016 The OpenSSL Project Authors. All Rights Reserved.
-#
-# Licensed under the OpenSSL license (the "License").  You may not use
-# this file except in compliance with the License.  You can obtain a copy
-# in the file LICENSE in the source distribution or at
-# https://www.openssl.org/source/license.html
-
-use strict;
-use warnings;
-
-use File::Spec::Functions;
-use File::Basename;
-#use File::Copy;
-#use File::Path;
-use lib catdir(dirname($0), "perl");
-use OpenSSL::Util::Pod;
-
-my %dups;
-
-sub parsenum()
-{
-    my $file = shift;
-    my @apis;
-
-    open my $IN, '<', $file
-        or die "Can't open $file, $!, stopped";
-
-    while ( <$IN> ) {
-        next if /\sNOEXIST/;
-        next if /EXPORT_VAR_AS_FUNC/;
-        push @apis, $1 if /([^\s]+).\s/;
-    }
-
-    close $IN;
-
-    print "# Found ", scalar(@apis), " in $file\n";
-    return sort @apis;
-}
-
-sub getdocced()
-{
-    my $dir = shift;
-    my %return;
-
-    foreach my $pod ( glob("$dir/*.pod") ) {
-        my %podinfo = extract_pod_info($pod);
-        foreach my $n ( @{$podinfo{names}} ) {
-            $return{$n} = $pod;
-            print "# Duplicate $n in $pod and $dups{$n}\n"
-                if defined $dups{$n} && $dups{$n} ne $pod;
-            $dups{$n} = $pod;
-        }
-    }
-
-    return %return;
-}
-
-my %docced = &getdocced('doc/man3');
-
-sub printem()
-{
-    my $numfile = shift;
-    my $count = 0;
-
-    foreach my $func ( &parsenum($numfile) ) {
-        next if $docced{$func};
-
-        # Skip ASN1 utilities
-        next if $func =~ /^ASN1_/;
-
-        print $func, "\n";
-        $count++;
-    }
-    print "# Found $count missing from $numfile\n\n";
-}
-
-&printem('util/libcrypto.num');
-&printem('util/libssl.num');