wikiheaders.pl: Migrate in docs that exist only in the wiki.

This is going to expose some docs that needs cleaning up once
the bridge imports those docs, though.

build-scripts/wikiheaders.pl

@@ -292,6 +292,7 @@ my %headerfuncs = ();   # $headerfuncs{"SDL_OpenAudio"} -> string of header docu
 my %headerdecls = ();
 my %headerfuncslocation = ();   # $headerfuncslocation{"SDL_OpenAudio"} -> name of header holding SDL_OpenAudio define ("SDL_audio.h" in this case).
 my %headerfuncschunk = ();   # $headerfuncschunk{"SDL_OpenAudio"} -> offset in array in %headers that should be replaced for this function.
+my %headerfuncshasdoxygen = ();   # $headerfuncschunk{"SDL_OpenAudio"} -> 1 if there was no existing doxygen for this function.
 
 my $incpath = "$srcpath/include";
 opendir(DH, $incpath) or die("Can't opendir '$incpath': $!\n");
@@ -304,14 +305,20 @@ while (readdir(DH)) {
 
     while (<FH>) {
         chomp;
-        if (not /\A\/\*\*\s*\Z/) {  # not doxygen comment start?
+        my $decl;
+        my @templines;
+        my $str;
+        my $has_doxygen = 1;
+        if (/\A\s*extern\s+DECLSPEC/) {  # a function declaration without a doxygen comment?
+            @templines = ();
+            $decl = $_;
+            $str = '';
+            $has_doxygen = 0;
+        } elsif (not /\A\/\*\*\s*\Z/) {  # not doxygen comment start?
             push @contents, $_;
             next;
-        }
+        } else {   # Start of a doxygen comment, parse it out.
-
+            @templines = ( $_ );
-        my @templines = ();
-        push @templines, $_;
-        my $str = '';
             while (<FH>) {
                 chomp;
                 push @templines, $_;
@@ -335,7 +342,8 @@ while (readdir(DH)) {
                 }
             }
 
-        my $decl = <FH>;
+            $decl = <FH>;
+            $decl = '' if not defined $decl;
             chomp($decl);
             if (not $decl =~ /\A\s*extern\s+DECLSPEC/) {
                 #print "Found doxygen but no function sig:\n$str\n\n";
@@ -345,6 +353,7 @@ while (readdir(DH)) {
                 push @contents, $decl;
                 next;
             }
+        }
 
         my @decllines = ( $decl );
 
@@ -397,6 +406,7 @@ while (readdir(DH)) {
         $headerdecls{$fn} = $decl;
         $headerfuncslocation{$fn} = $dent;
         $headerfuncschunk{$fn} = scalar(@contents);
+        $headerfuncshasdoxygen{$fn} = $has_doxygen;
 
         push @contents, join("\n", @templines);
         push @contents, join("\n", @decllines);
@@ -522,7 +532,6 @@ if ($copy_direction == 1) {  # --copy-to-headers
 
     $wordwrap_mode = 'md';   # the headers use Markdown format.
 
-    # if it's not in the headers already, we don't add it, so iterate what we know is already there for changes.
     foreach (keys %headerfuncs) {
         my $fn = $_;
         next if not defined $wikifuncs{$fn};  # don't have a page for that function, skip it.
@@ -537,6 +546,8 @@ if ($copy_direction == 1) {  # --copy-to-headers
         my $addblank = 0;
         my $str = '';
 
+        $headerfuncshasdoxygen{$fn} = 1;  # Added/changed doxygen for this header.
+
         $brief = dewikify($wikitype, $brief);
         $brief =~ s/\A(.*?\.) /$1\n/;  # \brief should only be one sentence, delimited by a period+space. Split if necessary.
         my @briefsplit = split /\n/, $brief;
@@ -632,8 +643,15 @@ if ($copy_direction == 1) {  # --copy-to-headers
             }
         }
 
+        my $header = $headerfuncslocation{$fn};
+        my $contentsref = $headers{$header};
+        my $chunk = $headerfuncschunk{$fn};
+
         my @lines = split /\n/, $str;
-        my $output = "/**\n";
+
+        my $addnewline = (($chunk > 0) && ($$contentsref[$chunk-1] ne '')) ? "\n" : '';
+
+        my $output = "$addnewline/**\n";
         foreach (@lines) {
             chomp;
             s/\s*\Z//;
@@ -647,9 +665,6 @@ if ($copy_direction == 1) {  # --copy-to-headers
 
         #print("$fn:\n$output\n\n");
 
-        my $header = $headerfuncslocation{$fn};
-        my $chunk = $headerfuncschunk{$fn};
-        my $contentsref = $headers{$header};
         $$contentsref[$chunk] = $output;
         #$$contentsref[$chunk+1] = $headerdecls{$fn};
 
@@ -657,19 +672,36 @@ if ($copy_direction == 1) {  # --copy-to-headers
     }
 
     foreach (keys %changed_headers) {
-        my $contentsref = $headers{$_};
+        my $header = $_;
-        my $path = "$incpath/$_.tmp";
+
+        # this is kinda inefficient, but oh well.
+        my @removelines = ();
+        foreach (keys %headerfuncslocation) {
+            my $fn = $_;
+            next if $headerfuncshasdoxygen{$fn};
+            next if $headerfuncslocation{$fn} ne $header;
+            # the index of the blank line we put before the function declaration in case we needed to replace it with new content from the wiki.
+            push @removelines, $headerfuncschunk{$fn};
+        }
+
+        my $contentsref = $headers{$header};
+        foreach (@removelines) {
+            delete $$contentsref[$_];  # delete DOES NOT RENUMBER existing elements!
+        }
+
+        my $path = "$incpath/$header.tmp";
         open(FH, '>', $path) or die("Can't open '$path': $!\n");
         foreach (@$contentsref) {
-            print FH "$_\n";
+            print FH "$_\n" if defined $_;
         }
         close(FH);
-        rename($path, "$incpath/$_") or die("Can't rename '$path' to '$incpath/$_': $!\n");
+        rename($path, "$incpath/$header") or die("Can't rename '$path' to '$incpath/$header': $!\n");
     }
 
 } elsif ($copy_direction == -1) { # --copy-to-wiki
     foreach (keys %headerfuncs) {
         my $fn = $_;
+        next if not $headerfuncshasdoxygen{$fn};
         my $wikitype = defined $wikitypes{$fn} ? $wikitypes{$fn} : 'mediawiki';  # default to MediaWiki for new stuff FOR NOW.
         die("Unexpected wikitype '$wikitype'\n") if (($wikitype ne 'mediawiki') and ($wikitype ne 'md'));
 
@@ -678,6 +710,7 @@ if ($copy_direction == 1) {  # --copy-to-headers
         $wordwrap_mode = $wikitype;
 
         my $raw = $headerfuncs{$fn};  # raw doxygen text with comment characters stripped from start/end and start of each line.
+        next if not defined $raw;
         $raw =~ s/\A\s*\\brief\s+//;  # Technically we don't need \brief (please turn on JAVADOC_AUTOBRIEF if you use Doxygen), so just in case one is present, strip it.
 
         my @doxygenlines = split /\n/, $raw;