===================================================================
RCS file: /cvs/mandoc/Attic/macro.c,v
retrieving revision 1.31
retrieving revision 1.39
diff -u -p -r1.31 -r1.39
--- mandoc/Attic/macro.c	2009/01/12 10:31:53	1.31
+++ mandoc/Attic/macro.c	2009/01/16 14:04:26	1.39
@@ -1,4 +1,4 @@
-/* $Id: macro.c,v 1.31 2009/01/12 10:31:53 kristaps Exp $ */
+/* $Id: macro.c,v 1.39 2009/01/16 14:04:26 kristaps Exp $ */
 /*
  * Copyright (c) 2008 Kristaps Dzonsons <kristaps@kth.se>
  *
@@ -29,12 +29,22 @@
 
 /* FIXME: maxlineargs should be per LINE, no per TOKEN. */
 
+static	int	  rewind_alt(int);
+static	int	  rewind_dohalt(int, enum mdoc_type, 
+			const struct mdoc_node *);
+#define	REWIND_REWIND	(1 << 0)
+#define	REWIND_NOHALT	(1 << 1)
+#define	REWIND_HALT	(1 << 2)
+static	int	  rewind_dobreak(int, enum mdoc_type, 
+			const struct mdoc_node *);
+
+
 static	int	  rewind_elem(struct mdoc *, int);
-static	int	  rewind_impblock(struct mdoc *, int);
-static	int	  rewind_expblock(struct mdoc *, int);
-static	int	  rewind_head(struct mdoc *, int);
-static	int	  rewind_body(struct mdoc *, int);
-static	int	  rewind_last(struct mdoc *, struct mdoc_node *);
+static	int	  rewind_impblock(struct mdoc *, int, int, int);
+static	int	  rewind_expblock(struct mdoc *, int, int, int);
+static	int	  rewind_subblock(enum mdoc_type, struct mdoc *, int);
+static	int	  rewind_last(int, int, 
+			struct mdoc *, struct mdoc_node *);
 static	int	  append_delims(struct mdoc *, 
 			int, int, int *, char *);
 static	int	  lookup(struct mdoc *, int, int, int, const char *);
@@ -51,14 +61,14 @@ lookup(struct mdoc *mdoc, int line, int pos, int from,
 	if (MDOC_MAX == res)
 		return(res);
 
-	if ( ! mdoc_pwarn(mdoc, line, pos, WARN_SYNTAX_MACLIKE))
+	if ( ! mdoc_pwarn(mdoc, line, pos, WARN_SYNTAX, "macro-like parameter"))
 		return(-1);
 	return(MDOC_MAX);
 }
 
 
 static int
-rewind_last(struct mdoc *mdoc, struct mdoc_node *to)
+rewind_last(int tok, int type, struct mdoc *mdoc, struct mdoc_node *to)
 {
 
 	assert(to);
@@ -68,6 +78,11 @@ rewind_last(struct mdoc *mdoc, struct mdoc_node *to)
 			return(0);
 		if ( ! mdoc_action_post(mdoc))
 			return(0);
+		mdoc_msg(mdoc, "rewound %s %s to %s %s", 
+				mdoc_type2a(type),
+				mdoc_macronames[tok],
+				mdoc_type2a(mdoc->last->type),
+				mdoc_macronames[mdoc->last->tok]);
 		return(1);
 	}
 
@@ -78,6 +93,11 @@ rewind_last(struct mdoc *mdoc, struct mdoc_node *to)
 			return(0);
 		if ( ! mdoc_action_post(mdoc))
 			return(0);
+		mdoc_msg(mdoc, "rewound %s %s to %s %s",
+				mdoc_type2a(type),
+				mdoc_macronames[tok],
+				mdoc_type2a(mdoc->last->type),
+				mdoc_macronames[mdoc->last->tok]);
 	} while (mdoc->last != to);
 
 	return(1);
@@ -85,116 +105,319 @@ rewind_last(struct mdoc *mdoc, struct mdoc_node *to)
 
 
 static int
-rewind_elem(struct mdoc *mdoc, int tok)
+rewind_alt(int tok)
 {
-	struct mdoc_node *n;
+	switch (tok) {
+	case (MDOC_Ac):
+		return(MDOC_Ao);
+	case (MDOC_Bc):
+		return(MDOC_Bo);
+	case (MDOC_Dc):
+		return(MDOC_Do);
+	case (MDOC_Ec):
+		return(MDOC_Eo);
+	case (MDOC_Ed):
+		return(MDOC_Bd);
+	case (MDOC_Ef):
+		return(MDOC_Bf);
+	case (MDOC_Ek):
+		return(MDOC_Bk);
+	case (MDOC_El):
+		return(MDOC_Bl);
+	case (MDOC_Fc):
+		return(MDOC_Fo);
+	case (MDOC_Oc):
+		return(MDOC_Oo);
+	case (MDOC_Pc):
+		return(MDOC_Po);
+	case (MDOC_Qc):
+		return(MDOC_Qo);
+	case (MDOC_Re):
+		return(MDOC_Rs);
+	case (MDOC_Sc):
+		return(MDOC_So);
+	case (MDOC_Xc):
+		return(MDOC_Xo);
+	default:
+		break;
+	}
+	abort();
+	/* NOTREACHED */
+}
 
-	n = mdoc->last;
-	if (MDOC_ELEM != n->type)
-		n = n->parent;
-	assert(MDOC_ELEM == n->type);
-	assert(tok == n->data.elem.tok);
 
-	return(rewind_last(mdoc, n));
+static int
+rewind_dohalt(int tok, enum mdoc_type type, const struct mdoc_node *p)
+{
+
+	if (MDOC_ROOT == p->type)
+		return(REWIND_HALT);
+	if (MDOC_TEXT == p->type) 
+		return(REWIND_NOHALT);
+	if (MDOC_ELEM == p->type) 
+		return(REWIND_NOHALT);
+
+	switch (tok) {
+	/* One-liner implicit-scope. */
+	case (MDOC_Aq):
+		/* FALLTHROUGH */
+	case (MDOC_Bq):
+		/* FALLTHROUGH */
+	case (MDOC_D1):
+		/* FALLTHROUGH */
+	case (MDOC_Dl):
+		/* FALLTHROUGH */
+	case (MDOC_Dq):
+		/* FALLTHROUGH */
+	case (MDOC_Op):
+		/* FALLTHROUGH */
+	case (MDOC_Pq):
+		/* FALLTHROUGH */
+	case (MDOC_Ql):
+		/* FALLTHROUGH */
+	case (MDOC_Qq):
+		/* FALLTHROUGH */
+	case (MDOC_Sq):
+		assert(MDOC_BODY != type);
+		assert(MDOC_TAIL != type);
+		if (type == p->type && tok == p->tok)
+			return(REWIND_REWIND);
+		break;
+
+	/* Multi-line implicit-scope. */
+	case (MDOC_It):
+		assert(MDOC_TAIL != type);
+		if (type == p->type && tok == p->tok)
+			return(REWIND_REWIND);
+		if (MDOC_BODY == p->type && MDOC_Bl == p->tok)
+			return(REWIND_HALT);
+		break;
+	case (MDOC_Sh):
+		if (type == p->type && tok == p->tok)
+			return(REWIND_REWIND);
+		break;
+	case (MDOC_Ss):
+		assert(MDOC_TAIL != type);
+		if (type == p->type && tok == p->tok)
+			return(REWIND_REWIND);
+		if (MDOC_BODY == p->type && MDOC_Sh == p->tok)
+			return(REWIND_HALT);
+		break;
+	
+	/* Multi-line explicit scope start. */
+	case (MDOC_Ao):
+		/* FALLTHROUGH */
+	case (MDOC_Bd):
+		/* FALLTHROUGH */
+	case (MDOC_Bf):
+		/* FALLTHROUGH */
+	case (MDOC_Bk):
+		/* FALLTHROUGH */
+	case (MDOC_Bl):
+		/* FALLTHROUGH */
+	case (MDOC_Bo):
+		/* FALLTHROUGH */
+	case (MDOC_Do):
+		/* FALLTHROUGH */
+	case (MDOC_Eo):
+		/* FALLTHROUGH */
+	case (MDOC_Fo):
+		/* FALLTHROUGH */
+	case (MDOC_Oo):
+		/* FALLTHROUGH */
+	case (MDOC_Po):
+		/* FALLTHROUGH */
+	case (MDOC_Qo):
+		/* FALLTHROUGH */
+	case (MDOC_Rs):
+		/* FALLTHROUGH */
+	case (MDOC_So):
+		/* FALLTHROUGH */
+	case (MDOC_Xo):
+		if (type == p->type && tok == p->tok)
+			return(REWIND_REWIND);
+		break;
+
+	/* Multi-line explicit scope close. */
+	case (MDOC_Ac):
+		/* FALLTHROUGH */
+	case (MDOC_Bc):
+		/* FALLTHROUGH */
+	case (MDOC_Dc):
+		/* FALLTHROUGH */
+	case (MDOC_Ec):
+		/* FALLTHROUGH */
+	case (MDOC_Ed):
+		/* FALLTHROUGH */
+	case (MDOC_Ek):
+		/* FALLTHROUGH */
+	case (MDOC_El):
+		/* FALLTHROUGH */
+	case (MDOC_Fc):
+		/* FALLTHROUGH */
+	case (MDOC_Ef):
+		/* FALLTHROUGH */
+	case (MDOC_Oc):
+		/* FALLTHROUGH */
+	case (MDOC_Pc):
+		/* FALLTHROUGH */
+	case (MDOC_Qc):
+		/* FALLTHROUGH */
+	case (MDOC_Re):
+		/* FALLTHROUGH */
+	case (MDOC_Sc):
+		/* FALLTHROUGH */
+	case (MDOC_Xc):
+		if (type == p->type && rewind_alt(tok) == p->tok)
+			return(REWIND_REWIND);
+		break;
+	default:
+		abort();
+		/* NOTREACHED */
+	}
+
+	return(REWIND_NOHALT);
 }
 
 
 static int
-rewind_body(struct mdoc *mdoc, int tok)
+rewind_dobreak(int tok, enum mdoc_type type, const struct mdoc_node *p)
 {
-	struct mdoc_node *n;
-	int		  t;
 
-	assert(mdoc->last);
+	assert(MDOC_ROOT != p->type);
+	if (MDOC_ELEM == p->type)
+		return(1);
+	if (MDOC_TEXT == p->type)
+		return(1);
 
-	/* LINTED */
-	for (n = mdoc->last; n; n = n->parent) {
-		if (MDOC_BODY != n->type) 
-			continue;
-		if (tok == (t = n->data.head.tok))
-			break;
-		if ( ! (MDOC_EXPLICIT & mdoc_macros[t].flags))
-			continue;
-		return(mdoc_verr(mdoc, n, ERR_SCOPE_BREAK));
+	switch (tok) {
+	/* Implicit rules. */
+	case (MDOC_It):
+		return(MDOC_It == p->tok);
+	case (MDOC_Ss):
+		return(MDOC_Ss == p->tok);
+	case (MDOC_Sh):
+		if (MDOC_Ss == p->tok)
+			return(1);
+		return(MDOC_Sh == p->tok);
+
+	/* Extra scope rules. */
+	case (MDOC_El):
+		if (MDOC_It == p->tok)
+			return(1);
+		break;
+	default:
+		break;
 	}
 
-	assert(n);
-	return(rewind_last(mdoc, n));
+	if (MDOC_EXPLICIT & mdoc_macros[tok].flags) 
+		return(p->tok == rewind_alt(tok));
+	else if (MDOC_BLOCK == p->type)
+		return(1);
+
+	return(tok == p->tok);
 }
 
 
 static int
-rewind_head(struct mdoc *mdoc, int tok)
+rewind_elem(struct mdoc *mdoc, int tok)
 {
 	struct mdoc_node *n;
-	int		  t;
 
-	assert(mdoc->last);
+	n = mdoc->last;
+	if (MDOC_ELEM != n->type)
+		n = n->parent;
+	assert(MDOC_ELEM == n->type);
+	assert(tok == n->tok);
 
+	return(rewind_last(tok, MDOC_ELEM, mdoc, n));
+}
+
+
+static int
+rewind_subblock(enum mdoc_type type, struct mdoc *mdoc, int tok)
+{
+	struct mdoc_node *n;
+	int		  c;
+
+	c = rewind_dohalt(tok, type, mdoc->last);
+	if (REWIND_HALT == c)
+		return(1);
+	if (REWIND_REWIND == c)
+		return(rewind_last(tok, type, mdoc, mdoc->last));
+
 	/* LINTED */
-	for (n = mdoc->last; n; n = n->parent) {
-		if (MDOC_HEAD != n->type) 
-			continue;
-		if (tok == (t = n->data.head.tok))
+	for (n = mdoc->last->parent; n; n = n->parent) {
+		c = rewind_dohalt(tok, type, n);
+		if (REWIND_HALT == c)
+			return(1);
+		if (REWIND_REWIND == c)
 			break;
-		if ( ! (MDOC_EXPLICIT & mdoc_macros[t].flags))
+		else if (rewind_dobreak(tok, type, n))
 			continue;
-		return(mdoc_verr(mdoc, n, ERR_SCOPE_BREAK));
+		return(mdoc_nerr(mdoc, n, "body scope broken"));
 	}
 
 	assert(n);
-	return(rewind_last(mdoc, n));
+	return(rewind_last(tok, type, mdoc, n));
 }
 
 
 static int
-rewind_expblock(struct mdoc *mdoc, int tok)
+rewind_expblock(struct mdoc *mdoc, int tok, int line, int ppos)
 {
 	struct mdoc_node *n;
-	int		  t;
+	int		  c;
 
-	n = mdoc->last ? mdoc->last->parent : NULL;
+	c = rewind_dohalt(tok, MDOC_BLOCK, mdoc->last);
+	if (REWIND_HALT == c)
+		return(mdoc_perr(mdoc, line, ppos, "closing macro has no context"));
+	if (REWIND_REWIND == c)
+		return(rewind_last(tok, MDOC_BLOCK, mdoc, mdoc->last));
 
 	/* LINTED */
-	for ( ; n; n = n->parent) {
-		if (MDOC_BLOCK != n->type)
-			continue;
-		if (tok == (t = n->data.block.tok))
+	for (n = mdoc->last->parent; n; n = n->parent) {
+		c = rewind_dohalt(tok, MDOC_BLOCK, n);
+		if (REWIND_HALT == c)
+			return(mdoc_perr(mdoc, line, ppos, "closing macro has no context"));
+		if (REWIND_REWIND == c)
 			break;
-		if (MDOC_NESTED & mdoc_macros[t].flags)
+		else if (rewind_dobreak(tok, MDOC_BLOCK, n))
 			continue;
-		return(mdoc_verr(mdoc, n, ERR_SCOPE_BREAK));
+		return(mdoc_nerr(mdoc, n, "block scope broken"));
 	}
 
 	assert(n);
-	return(rewind_last(mdoc, n));
+	return(rewind_last(tok, MDOC_BLOCK, mdoc, n));
 }
 
 
 static int
-rewind_impblock(struct mdoc *mdoc, int tok)
+rewind_impblock(struct mdoc *mdoc, int tok, int line, int ppos)
 {
-	int		  t;
 	struct mdoc_node *n;
+	int		  c;
 
-	n = mdoc->last ? mdoc->last->parent : NULL;
+	c = rewind_dohalt(tok, MDOC_BLOCK, mdoc->last);
+	if (REWIND_HALT == c)
+		return(1);
+	if (REWIND_REWIND == c)
+		return(rewind_last(tok, MDOC_BLOCK, mdoc, mdoc->last));
 
 	/* LINTED */
-	for ( ; n; n = n->parent) {
-		if (MDOC_BLOCK != n->type) 
-			continue;
-		if (tok == (t = n->data.block.tok))
+	for (n = mdoc->last->parent; n; n = n->parent) {
+		c = rewind_dohalt(tok, MDOC_BLOCK, n);
+		if (REWIND_HALT == c)
+			return(1);
+		else if (REWIND_REWIND == c)
 			break;
-		if ( ! (MDOC_EXPLICIT & mdoc_macros[t].flags))
+		else if (rewind_dobreak(tok, MDOC_BLOCK, n))
 			continue;
-		if (MDOC_NESTED & mdoc_macros[tok].flags)
-			return(1);
-		return(mdoc_verr(mdoc, n, ERR_SCOPE_BREAK));
+		return(mdoc_nerr(mdoc, n, "block scope broken"));
 	}
 
-	if (NULL == n)
-		return(1);
-	return(rewind_last(mdoc, n));
+	assert(n);
+	return(rewind_last(tok, MDOC_BLOCK, mdoc, n));
 }
 
 
@@ -227,64 +450,13 @@ append_delims(struct mdoc *mdoc, int tok, 
 
 /* ARGSUSED */
 int
-macro_close_explicit(MACRO_PROT_ARGS)
+macro_scoped_close(MACRO_PROT_ARGS)
 {
 	int	 	 tt, j, c, lastarg, maxargs, flushed;
 	char		*p;
 
 	switch (tok) {
-	case (MDOC_Ac):
-		tt = MDOC_Ao;
-		break;
-	case (MDOC_Bc):
-		tt = MDOC_Bo;
-		break;
-	case (MDOC_Dc):
-		tt = MDOC_Do;
-		break;
 	case (MDOC_Ec):
-		tt = MDOC_Eo;
-		break;
-	case (MDOC_Ed):
-		tt = MDOC_Bd;
-		break;
-	case (MDOC_Ef):
-		tt = MDOC_Bf;
-		break;
-	case (MDOC_Ek):
-		tt = MDOC_Bk;
-		break;
-	case (MDOC_El):
-		tt = MDOC_Bl;
-		break;
-	case (MDOC_Fc):
-		tt = MDOC_Fo;
-		break;
-	case (MDOC_Oc):
-		tt = MDOC_Oo;
-		break;
-	case (MDOC_Pc):
-		tt = MDOC_Po;
-		break;
-	case (MDOC_Qc):
-		tt = MDOC_Qo;
-		break;
-	case (MDOC_Re):
-		tt = MDOC_Rs;
-		break;
-	case (MDOC_Sc):
-		tt = MDOC_So;
-		break;
-	case (MDOC_Xc):
-		tt = MDOC_Xo;
-		break;
-	default:
-		abort();
-		/* NOTREACHED */
-	}
-
-	switch (tok) {
-	case (MDOC_Ec):
 		maxargs = 1;
 		break;
 	default:
@@ -292,13 +464,21 @@ macro_close_explicit(MACRO_PROT_ARGS)
 		break;
 	}
 
+	tt = rewind_alt(tok);
+
+	mdoc_msg(mdoc, "parse-quiet: %s closing %s",
+			mdoc_macronames[tok], mdoc_macronames[tt]);
+
 	if ( ! (MDOC_CALLABLE & mdoc_macros[tok].flags)) {
-		if (0 == buf[*pos])
-			return(rewind_expblock(mdoc, tt));
-		return(mdoc_perr(mdoc, line, ppos, ERR_ARGS_EQ0));
+		if (0 == buf[*pos]) {
+			if ( ! rewind_subblock(MDOC_BODY, mdoc, tok))
+				return(0);
+			return(rewind_expblock(mdoc, tok, line, ppos));
+		}
+		return(mdoc_perr(mdoc, line, ppos, "macro expects no parameters"));
 	}
 
-	if ( ! rewind_body(mdoc, tt))
+	if ( ! rewind_subblock(MDOC_BODY, mdoc, tok))
 		return(0);
 
 	lastarg = ppos;
@@ -314,7 +494,7 @@ macro_close_explicit(MACRO_PROT_ARGS)
 		lastarg = *pos;
 
 		if (j == maxargs && ! flushed) {
-			if ( ! rewind_expblock(mdoc, tt))
+			if ( ! rewind_expblock(mdoc, tok, line, ppos))
 				return(0);
 			flushed = 1;
 		}
@@ -331,7 +511,7 @@ macro_close_explicit(MACRO_PROT_ARGS)
 			return(0);
 		else if (MDOC_MAX != c) {
 			if ( ! flushed) {
-				if ( ! rewind_expblock(mdoc, tt))
+				if ( ! rewind_expblock(mdoc, tok, line, ppos))
 					return(0);
 				flushed = 1;
 			}
@@ -346,9 +526,9 @@ macro_close_explicit(MACRO_PROT_ARGS)
 	}
 
 	if (MDOC_LINEARG_MAX == j)
-		return(mdoc_perr(mdoc, line, ppos, ERR_ARGS_MANY));
+		return(mdoc_perr(mdoc, line, ppos, "too many arguments"));
 
-	if ( ! flushed && ! rewind_expblock(mdoc, tt))
+	if ( ! flushed && ! rewind_expblock(mdoc, tok, line, ppos))
 		return(0);
 
 	if (ppos > 1)
@@ -380,17 +560,21 @@ macro_text(MACRO_PROT_ARGS)
 		la = *pos;
 
 		c = mdoc_argv(mdoc, line, tok, &argv[argc], pos, buf);
-		if (ARGV_EOLN == c || ARGV_WORD == c)
+		if (ARGV_EOLN == c)
 			break;
-		else if (ARGV_ARG == c)
+		if (ARGV_WORD == c) {
+			*pos = la;
+			break;
+		} else if (ARGV_ARG == c)
 			continue;
+
 		mdoc_argv_free(argc, argv);
 		return(0);
 	}
 
 	if (MDOC_LINEARG_MAX == argc) {
 		mdoc_argv_free(argc, argv);
-		return(mdoc_perr(mdoc, line, ppos, ERR_ARGS_MANY));
+		return(mdoc_perr(mdoc, line, ppos, "too many arguments"));
 	}
 
 	c = mdoc_elem_alloc(mdoc, line, la, tok, argc, argv);
@@ -409,17 +593,6 @@ macro_text(MACRO_PROT_ARGS)
 	for (lastpunct = sz = 0; sz + argc < MDOC_LINEARG_MAX; sz++) {
 		la = *pos;
 
-		if (lastpunct) {
-			c = mdoc_elem_alloc(mdoc, line, 
-					la, tok, argc, argv);
-			if (0 == c) {
-				mdoc_argv_free(argc, argv);
-				return(0);
-			}
-			mdoc->next = MDOC_NEXT_CHILD;
-			lastpunct = 0;
-		}
-
 		c = mdoc_args(mdoc, line, pos, buf, fl, &p);
 		if (ARGS_ERROR == c) {
 			mdoc_argv_free(argc, argv);
@@ -434,7 +607,7 @@ macro_text(MACRO_PROT_ARGS)
 		if (-1 == (c = lookup(mdoc, line, la, tok, p)))
 			return(0);
 		else if (MDOC_MAX != c) {
-			if ( ! rewind_elem(mdoc, tok)) {
+			if (0 == lastpunct && ! rewind_elem(mdoc, tok)) {
 				mdoc_argv_free(argc, argv);
 				return(0);
 			}
@@ -449,12 +622,22 @@ macro_text(MACRO_PROT_ARGS)
 		}
 
 		if (mdoc_isdelim(p)) {
-			if ( ! rewind_elem(mdoc, tok)) {
+			if (0 == lastpunct && ! rewind_elem(mdoc, tok)) {
 				mdoc_argv_free(argc, argv);
 				return(0);
 			}
 			lastpunct = 1;
+		} else if (lastpunct) {
+			c = mdoc_elem_alloc(mdoc, line, 
+					la, tok, argc, argv);
+			if (0 == c) {
+				mdoc_argv_free(argc, argv);
+				return(0);
+			}
+			mdoc->next = MDOC_NEXT_CHILD;
+			lastpunct = 0;
 		}
+
 		if ( ! mdoc_word_alloc(mdoc, line, la, p))
 			return(0);
 		mdoc->next = MDOC_NEXT_SIBLING;
@@ -463,9 +646,9 @@ macro_text(MACRO_PROT_ARGS)
 	mdoc_argv_free(argc, argv);
 
 	if (sz == MDOC_LINEARG_MAX)
-		return(mdoc_perr(mdoc, line, ppos, ERR_ARGS_MANY));
+		return(mdoc_perr(mdoc, line, ppos, "too many arguments"));
 
-	if ( ! rewind_elem(mdoc, tok))
+	if (0 == lastpunct && ! rewind_elem(mdoc, tok))
 		return(0);
 	if (ppos > 1)
 		return(1);
@@ -479,22 +662,28 @@ macro_text(MACRO_PROT_ARGS)
 int
 macro_scoped(MACRO_PROT_ARGS)
 {
-	int		  c, lastarg, argc, j;
+	int		  c, lastarg, argc, j, fl;
 	struct mdoc_arg	  argv[MDOC_LINEARG_MAX];
 	char		 *p;
 
 	assert ( ! (MDOC_CALLABLE & mdoc_macros[tok].flags));
 
-	if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)) 
-		if ( ! rewind_impblock(mdoc, tok))
+	if ( ! (MDOC_EXPLICIT & mdoc_macros[tok].flags)) {
+		if ( ! rewind_subblock(MDOC_BODY, mdoc, tok))
 			return(0);
+		if ( ! rewind_impblock(mdoc, tok, line, ppos))
+			return(0);
+	}
 
 	for (argc = 0; argc < MDOC_LINEARG_MAX; argc++) {
 		lastarg = *pos;
 		c = mdoc_argv(mdoc, line, tok, &argv[argc], pos, buf);
-		if (ARGV_EOLN == c || ARGV_WORD == c)
+		if (ARGV_EOLN == c)
 			break;
-		else if (ARGV_ARG == c)
+		if (ARGV_WORD == c) {
+			*pos = lastarg;
+			break;
+		} else if (ARGV_ARG == c)
 			continue;
 		mdoc_argv_free(argc, argv);
 		return(0);
@@ -502,7 +691,7 @@ macro_scoped(MACRO_PROT_ARGS)
 
 	if (MDOC_LINEARG_MAX == argc) {
 		mdoc_argv_free(argc, argv);
-		return(mdoc_perr(mdoc, line, ppos, ERR_ARGS_MANY));
+		return(mdoc_perr(mdoc, line, ppos, "too many arguments"));
 	}
 
 	c = mdoc_block_alloc(mdoc, line, ppos, 
@@ -517,7 +706,7 @@ macro_scoped(MACRO_PROT_ARGS)
 	if (0 == buf[*pos]) {
 		if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
 			return(0);
-		if ( ! rewind_head(mdoc, tok))
+		if ( ! rewind_subblock(MDOC_HEAD, mdoc, tok))
 			return(0);
 		if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
 			return(0);
@@ -529,9 +718,13 @@ macro_scoped(MACRO_PROT_ARGS)
 		return(0);
 	mdoc->next = MDOC_NEXT_CHILD;
 
+	fl = ARGS_DELIM;
+	if (MDOC_TABSEP & mdoc_macros[tok].flags)
+		fl |= ARGS_TABSEP;
+
 	for (j = 0; j < MDOC_LINEARG_MAX; j++) {
 		lastarg = *pos;
-		c = mdoc_args(mdoc, line, pos, buf, ARGS_DELIM, &p);
+		c = mdoc_args(mdoc, line, pos, buf, fl, &p);
 	
 		if (ARGS_ERROR == c)
 			return(0);
@@ -555,9 +748,9 @@ macro_scoped(MACRO_PROT_ARGS)
 	}
 
 	if (j == MDOC_LINEARG_MAX)
-		return(mdoc_perr(mdoc, line, ppos, ERR_ARGS_MANY));
+		return(mdoc_perr(mdoc, line, ppos, "too many arguments"));
 
-	if ( ! rewind_head(mdoc, tok))
+	if ( ! rewind_subblock(MDOC_HEAD, mdoc, tok))
 		return(0);
 	if (1 == ppos && ! append_delims(mdoc, tok, line, pos, buf))
 		return(0);
@@ -617,15 +810,16 @@ macro_scoped_line(MACRO_PROT_ARGS)
 	}
 
 	if (j == MDOC_LINEARG_MAX)
-		return(mdoc_perr(mdoc, line, ppos, ERR_ARGS_MANY));
+		return(mdoc_perr(mdoc, line, ppos, "too many arguments"));
 
 	if (1 == ppos) {
-		if ( ! rewind_head(mdoc, tok))
+		if ( ! rewind_subblock(MDOC_HEAD, mdoc, tok))
 			return(0);
 		if ( ! append_delims(mdoc, tok, line, pos, buf))
 			return(0);
-	}
-	return(rewind_impblock(mdoc, tok));
+	} else if ( ! rewind_subblock(MDOC_HEAD, mdoc, tok))
+		return(0);
+	return(rewind_impblock(mdoc, tok, line, ppos));
 }
 
 
@@ -658,7 +852,7 @@ macro_constant_scoped(MACRO_PROT_ARGS)
 	if (0 == maxargs) {
 		if ( ! mdoc_head_alloc(mdoc, line, ppos, tok))
 			return(0);
-		if ( ! rewind_head(mdoc, tok))
+		if ( ! rewind_subblock(MDOC_HEAD, mdoc, tok))
 			return(0);
 		if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
 			return(0);
@@ -672,7 +866,7 @@ macro_constant_scoped(MACRO_PROT_ARGS)
 		lastarg = *pos;
 
 		if (j == maxargs && ! flushed) {
-			if ( ! rewind_head(mdoc, tok))
+			if ( ! rewind_subblock(MDOC_HEAD, mdoc, tok))
 				return(0);
 			flushed = 1;
 			if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
@@ -692,7 +886,7 @@ macro_constant_scoped(MACRO_PROT_ARGS)
 			return(0);
 		else if (MDOC_MAX != c) {
 			if ( ! flushed) {
-				if ( ! rewind_head(mdoc, tok))
+				if ( ! rewind_subblock(MDOC_HEAD, mdoc, tok))
 					return(0);
 				flushed = 1;
 				if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
@@ -705,7 +899,7 @@ macro_constant_scoped(MACRO_PROT_ARGS)
 		}
 
 		if ( ! flushed && mdoc_isdelim(p)) {
-			if ( ! rewind_head(mdoc, tok))
+			if ( ! rewind_subblock(MDOC_HEAD, mdoc, tok))
 				return(0);
 			flushed = 1;
 			if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
@@ -719,10 +913,10 @@ macro_constant_scoped(MACRO_PROT_ARGS)
 	}
 
 	if (MDOC_LINEARG_MAX == j)
-		return(mdoc_perr(mdoc, line, ppos, ERR_ARGS_MANY));
+		return(mdoc_perr(mdoc, line, ppos, "too many arguments"));
 
 	if ( ! flushed) {
-		if ( ! rewind_head(mdoc, tok))
+		if ( ! rewind_subblock(MDOC_HEAD, mdoc, tok))
 			return(0);
 		if ( ! mdoc_body_alloc(mdoc, line, ppos, tok))
 			return(0);
@@ -756,6 +950,8 @@ macro_constant_delimited(MACRO_PROT_ARGS)
 		/* FALLTHROUGH */
 	case (MDOC_Ns):
 		/* FALLTHROUGH */
+	case (MDOC_Pf):
+		/* FALLTHROUGH */
 	case (MDOC_Ux):
 		/* FALLTHROUGH */
 	case (MDOC_St):
@@ -769,9 +965,12 @@ macro_constant_delimited(MACRO_PROT_ARGS)
 	for (argc = 0; argc < MDOC_LINEARG_MAX; argc++) {
 		lastarg = *pos;
 		c = mdoc_argv(mdoc, line, tok, &argv[argc], pos, buf);
-		if (ARGV_EOLN == c || ARGV_WORD == c)
+		if (ARGV_EOLN == c)
 			break;
-		else if (ARGV_ARG == c)
+		if (ARGV_WORD == c) {
+			*pos = lastarg;
+			break;
+		} else if (ARGV_ARG == c)
 			continue;
 		mdoc_argv_free(argc, argv);
 		return(0);
@@ -825,7 +1024,7 @@ macro_constant_delimited(MACRO_PROT_ARGS)
 	}
 
 	if (MDOC_LINEARG_MAX == j)
-		return(mdoc_perr(mdoc, line, ppos, ERR_ARGS_MANY));
+		return(mdoc_perr(mdoc, line, ppos, "too many arguments"));
 
 	if ( ! flushed && rewind_elem(mdoc, tok))
 		return(0);
@@ -847,8 +1046,6 @@ macro_constant(MACRO_PROT_ARGS)
 	struct mdoc_arg	 argv[MDOC_LINEARG_MAX];
 	char		*p;
 
-	/* FIXME: parsing macros! */
-
 	fl = 0;
 	if (MDOC_QUOTABLE & mdoc_macros[tok].flags)
 		fl = ARGS_QUOTED;
@@ -858,10 +1055,11 @@ macro_constant(MACRO_PROT_ARGS)
 		c = mdoc_argv(mdoc, line, tok, &argv[argc], pos, buf);
 		if (ARGV_EOLN == c) 
 			break;
-		else if (ARGV_ARG == c)
-			continue;
-		else if (ARGV_WORD == c)
+		if (ARGV_WORD == c) {
+			*pos = lastarg;
 			break;
+		} else if (ARGV_ARG == c)
+			continue;
 
 		mdoc_argv_free(argc, argv);
 		return(0);
@@ -876,7 +1074,7 @@ macro_constant(MACRO_PROT_ARGS)
 	mdoc->next = MDOC_NEXT_CHILD;
 
 	if (MDOC_LINEARG_MAX == argc)
-		return(mdoc_perr(mdoc, line, ppos, ERR_ARGS_MANY));
+		return(mdoc_perr(mdoc, line, ppos, "too many arguments"));
 
 	for (sz = 0; sz + argc < MDOC_LINEARG_MAX; sz++) {
 		lastarg = *pos;
@@ -886,13 +1084,22 @@ macro_constant(MACRO_PROT_ARGS)
 		if (ARGS_EOLN == c)
 			break;
 
+		if (-1 == (c = lookup(mdoc, line, lastarg, tok, p)))
+			return(0);
+		else if (MDOC_MAX != c) {
+			if ( ! rewind_elem(mdoc, tok))
+				return(0);
+			return(mdoc_macro(mdoc, c, line, 
+						lastarg, pos, buf));
+		}
+
 		if ( ! mdoc_word_alloc(mdoc, line, lastarg, p))
 			return(0);
 		mdoc->next = MDOC_NEXT_SIBLING;
 	}
 
 	if (MDOC_LINEARG_MAX == sz + argc)
-		return(mdoc_perr(mdoc, line, ppos, ERR_ARGS_MANY));
+		return(mdoc_perr(mdoc, line, ppos, "too many arguments"));
 
 	return(rewind_elem(mdoc, tok));
 }
@@ -903,7 +1110,7 @@ int
 macro_obsolete(MACRO_PROT_ARGS)
 {
 
-	return(mdoc_pwarn(mdoc, line, ppos, WARN_IGN_OBSOLETE));
+	return(mdoc_pwarn(mdoc, line, ppos, WARN_SYNTAX, "macro is obsolete"));
 }
 
 
@@ -913,5 +1120,6 @@ macro_end(struct mdoc *mdoc)
 
 	assert(mdoc->first);
 	assert(mdoc->last);
-	return(rewind_last(mdoc, mdoc->first));
+	return(rewind_last(mdoc->last->tok, mdoc->last->type,
+				mdoc, mdoc->first));
 }