mandoc: Reset HTML formatter state, in particular the id_unique hash,

[schwarze@mandoc.bsd.lv]

Log Message:
-----------
Reset HTML formatter state, in particular the id_unique hash,
after processing each manual page, such that the next page
starts from a clean state and doesn't continue suffix numbering.

Issue found while looking at https://github.com/Debian/debiman/issues/48
which was brought up by Orestis Ioannou <oorestisime at github>.

Modified Files:
--------------
    mandoc:
        html.c
        main.c
        main.h
        mandocd.c

Revision Data
-------------
Index: html.c
===================================================================
RCS file: /home/cvs/mandoc/mandoc/html.c,v
retrieving revision 1.253
retrieving revision 1.254
diff -Lhtml.c -Lhtml.c -u -p -r1.253 -r1.254
--- html.c
+++ html.c
@@ -110,6 +110,7 @@ static	const struct htmldata htmltags[TA
 /* Avoid duplicate HTML id= attributes. */
 static	struct ohash	 id_unique;
 
+static	void	 html_reset_internal(struct html *);
 static	void	 print_byte(struct html *, char);
 static	void	 print_endword(struct html *);
 static	void	 print_indent(struct html *);
@@ -145,27 +146,37 @@ html_alloc(const struct manoutput *outop
 	return h;
 }
 
-void
-html_free(void *p)
+static void
+html_reset_internal(struct html *h)
 {
 	struct tag	*tag;
-	struct html	*h;
 	char		*cp;
 	unsigned int	 slot;
 
-	h = (struct html *)p;
 	while ((tag = h->tag) != NULL) {
 		h->tag = tag->next;
 		free(tag);
 	}
-	free(h);
-
 	cp = ohash_first(&id_unique, &slot);
 	while (cp != NULL) {
 		free(cp);
 		cp = ohash_next(&id_unique, &slot);
 	}
 	ohash_delete(&id_unique);
+}
+
+void
+html_reset(void *p)
+{
+	html_reset_internal(p);
+	mandoc_ohash_init(&id_unique, 4, 0);
+}
+
+void
+html_free(void *p)
+{
+	html_reset_internal(p);
+	free(p);
 }
 
 void
Index: mandocd.c
===================================================================
RCS file: /home/cvs/mandoc/mandoc/mandocd.c,v
retrieving revision 1.10
retrieving revision 1.11
diff -Lmandocd.c -Lmandocd.c -u -p -r1.10 -r1.11
--- mandocd.c
+++ mandocd.c
@@ -1,7 +1,7 @@
 /*	$Id$ */
 /*
  * Copyright (c) 2017 Michael Stapelberg <stapelberg@debian.org>
- * Copyright (c) 2017 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2017, 2019 Ingo Schwarze <schwarze@openbsd.org>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -213,6 +213,8 @@ main(int argc, char *argv[])
 
 		process(parser, outtype, formatter);
 		mparse_reset(parser);
+		if (outtype == OUTT_HTML)
+			html_reset(formatter);
 
 		fflush(stdout);
 		fflush(stderr);
Index: main.c
===================================================================
RCS file: /home/cvs/mandoc/mandoc/main.c,v
retrieving revision 1.318
retrieving revision 1.319
diff -Lmain.c -Lmain.c -u -p -r1.318 -r1.319
--- main.c
+++ main.c
@@ -835,6 +835,8 @@ parse(struct curparse *curp, int fd, con
 
 	if (curp->outdata == NULL)
 		outdata_alloc(curp);
+	else if (curp->outtype == OUTT_HTML)
+		html_reset(curp);
 
 	mandoc_xr_reset();
 	meta = mparse_result(curp->mp);
Index: main.h
===================================================================
RCS file: /home/cvs/mandoc/mandoc/main.h,v
retrieving revision 1.29
retrieving revision 1.30
diff -Lmain.h -Lmain.h -u -p -r1.29 -r1.30
--- main.h
+++ main.h
@@ -1,7 +1,7 @@
 /*	$Id$ */
 /*
  * Copyright (c) 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
- * Copyright (c) 2014, 2015 Ingo Schwarze <schwarze@openbsd.org>
+ * Copyright (c) 2014, 2015, 2019 Ingo Schwarze <schwarze@openbsd.org>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -29,6 +29,7 @@ struct	manoutput;
 void		 *html_alloc(const struct manoutput *);
 void		  html_mdoc(void *, const struct roff_meta *);
 void		  html_man(void *, const struct roff_meta *);
+void		  html_reset(void *);
 void		  html_free(void *);
 
 void		  tree_mdoc(void *, const struct roff_meta *);
--
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