===================================================================
RCS file: /cvs/mandoc/man.c,v
retrieving revision 1.43
retrieving revision 1.86
diff -u -p -r1.43 -r1.86
--- mandoc/man.c	2009/10/26 07:11:06	1.43
+++ mandoc/man.c	2010/08/08 14:51:32	1.86
@@ -1,6 +1,6 @@
-/*	$Id: man.c,v 1.43 2009/10/26 07:11:06 kristaps Exp $ */
+/*	$Id: man.c,v 1.86 2010/08/08 14:51:32 schwarze Exp $ */
 /*
- * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
+ * Copyright (c) 2008, 2009, 2010 Kristaps Dzonsons <kristaps@bsd.lv>
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -14,39 +14,22 @@
  * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
  * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
  */
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
 #include <sys/types.h>
 
 #include <assert.h>
-#include <ctype.h>
 #include <stdarg.h>
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>
 
+#include "mandoc.h"
 #include "libman.h"
+#include "libmandoc.h"
 
-const	char *const __man_merrnames[WERRMAX] = {		 
-	"invalid character", /* WNPRINT */
-	"system: malloc error", /* WNMEM */
-	"invalid manual section", /* WMSEC */
-	"invalid date format", /* WDATE */
-	"scope of prior line violated", /* WLNSCOPE */
-	"trailing whitespace", /* WTSPACE */
-	"unterminated quoted parameter", /* WTQUOTE */
-	"document has no body", /* WNODATA */
-	"document has no title/section", /* WNOTITLE */
-	"invalid escape sequence", /* WESCAPE */
-	"invalid number format", /* WNUMFMT */
-	"expected block head arguments", /* WHEADARGS */
-	"expected block body arguments", /* WBODYARGS */
-	"expected empty block head", /* WNHEADARGS */
-	"ill-formed macro", /* WMACROFORM */
-	"scope open on exit", /* WEXITSCOPE */
-	"no scope context", /* WNOSCOPE */
-	"literal context already open", /* WOLITERAL */
-	"no literal context open" /* WNLITERAL */
-};
-
 const	char *const __man_macronames[MAN_MAX] = {		 
 	"br",		"TH",		"SH",		"SS",
 	"TP", 		"LP",		"PP",		"P",
@@ -55,28 +38,27 @@ const	char *const __man_macronames[MAN_MAX] = {		 
 	"R",		"B",		"I",		"IR",
 	"RI",		"na",		"i",		"sp",
 	"nf",		"fi",		"r",		"RE",
-	"RS",		"DT",		"UC",		"PD"
+	"RS",		"DT",		"UC",		"PD",
+	"Sp",		"Vb",		"Ve",		"AT",
+	"in"
 	};
 
 const	char * const *man_macronames = __man_macronames;
 
 static	struct man_node	*man_node_alloc(int, int, 
-				enum man_type, int);
+				enum man_type, enum mant);
 static	int		 man_node_append(struct man *, 
 				struct man_node *);
-static	int		 man_ptext(struct man *, int, char *);
-static	int		 man_pmacro(struct man *, int, char *);
+static	void		 man_node_free(struct man_node *);
+static	void		 man_node_unlink(struct man *, 
+				struct man_node *);
+static	int		 man_ptext(struct man *, int, char *, int);
+static	int		 man_pmacro(struct man *, int, char *, int);
 static	void		 man_free1(struct man *);
-static	int		 man_alloc1(struct man *);
-static	int		 pstring(struct man *, int, int, 
-				const char *, size_t);
-static	int		 macrowarn(struct man *, int, const char *);
+static	void		 man_alloc1(struct man *);
+static	int		 macrowarn(struct man *, int, const char *, int);
 
-#ifdef __linux__
-extern	size_t	  	  strlcpy(char *, const char *, size_t);
-#endif
 
-
 const struct man_node *
 man_node(const struct man *m)
 {
@@ -93,12 +75,12 @@ man_meta(const struct man *m)
 }
 
 
-int
+void
 man_reset(struct man *man)
 {
 
 	man_free1(man);
-	return(man_alloc1(man));
+	man_alloc1(man);
 }
 
 
@@ -112,23 +94,20 @@ man_free(struct man *man)
 
 
 struct man *
-man_alloc(void *data, int pflags, const struct man_cb *cb)
+man_alloc(struct regset *regs, void *data, 
+		int pflags, mandocmsg msg)
 {
 	struct man	*p;
 
-	if (NULL == (p = calloc(1, sizeof(struct man))))
-		return(NULL);
+	p = mandoc_calloc(1, sizeof(struct man));
 
-	if ( ! man_alloc1(p)) {
-		free(p);
-		return(NULL);
-	}
-
 	man_hash_init();
-
 	p->data = data;
 	p->pflags = pflags;
-	(void)memcpy(&p->cb, cb, sizeof(struct man_cb));
+	p->msg = msg;
+	p->regs = regs;
+
+	man_alloc1(p);
 	return(p);
 }
 
@@ -147,12 +126,15 @@ man_endparse(struct man *m)
 
 
 int
-man_parseln(struct man *m, int ln, char *buf)
+man_parseln(struct man *m, int ln, char *buf, int offs)
 {
 
-	return('.' == *buf ? 
-			man_pmacro(m, ln, buf) : 
-			man_ptext(m, ln, buf));
+	if (MAN_HALT & m->flags)
+		return(0);
+
+	return(('.' == buf[offs] || '\'' == buf[offs]) ? 
+			man_pmacro(m, ln, buf, offs) : 
+			man_ptext(m, ln, buf, offs));
 }
 
 
@@ -161,29 +143,31 @@ man_free1(struct man *man)
 {
 
 	if (man->first)
-		man_node_freelist(man->first);
+		man_node_delete(man, man->first);
 	if (man->meta.title)
 		free(man->meta.title);
 	if (man->meta.source)
 		free(man->meta.source);
+	if (man->meta.rawdate)
+		free(man->meta.rawdate);
 	if (man->meta.vol)
 		free(man->meta.vol);
+	if (man->meta.msec)
+		free(man->meta.msec);
 }
 
 
-static int
+static void
 man_alloc1(struct man *m)
 {
 
-	bzero(&m->meta, sizeof(struct man_meta));
+	memset(&m->meta, 0, sizeof(struct man_meta));
 	m->flags = 0;
-	m->last = calloc(1, sizeof(struct man_node));
-	if (NULL == m->last)
-		return(0);
+	m->last = mandoc_calloc(1, sizeof(struct man_node));
 	m->first = m->last;
 	m->last->type = MAN_ROOT;
+	m->last->tok = MAN_MAX;
 	m->next = MAN_NEXT_CHILD;
-	return(1);
 }
 
 
@@ -210,6 +194,7 @@ man_node_append(struct man *man, struct man_node *p)
 		/* NOTREACHED */
 	}
 	
+	assert(p->parent);
 	p->parent->nchild++;
 
 	if ( ! man_valid_pre(man, p))
@@ -246,14 +231,11 @@ man_node_append(struct man *man, struct man_node *p)
 
 
 static struct man_node *
-man_node_alloc(int line, int pos, enum man_type type, int tok)
+man_node_alloc(int line, int pos, enum man_type type, enum mant tok)
 {
 	struct man_node *p;
 
-	p = calloc(1, sizeof(struct man_node));
-	if (NULL == p)
-		return(NULL);
-
+	p = mandoc_calloc(1, sizeof(struct man_node));
 	p->line = line;
 	p->pos = pos;
 	p->type = type;
@@ -263,13 +245,11 @@ man_node_alloc(int line, int pos, enum man_type type, 
 
 
 int
-man_elem_alloc(struct man *m, int line, int pos, int tok)
+man_elem_alloc(struct man *m, int line, int pos, enum mant tok)
 {
 	struct man_node *p;
 
 	p = man_node_alloc(line, pos, MAN_ELEM, tok);
-	if (NULL == p)
-		return(0);
 	if ( ! man_node_append(m, p))
 		return(0);
 	m->next = MAN_NEXT_CHILD;
@@ -278,13 +258,11 @@ man_elem_alloc(struct man *m, int line, int pos, int t
 
 
 int
-man_head_alloc(struct man *m, int line, int pos, int tok)
+man_head_alloc(struct man *m, int line, int pos, enum mant tok)
 {
 	struct man_node *p;
 
 	p = man_node_alloc(line, pos, MAN_HEAD, tok);
-	if (NULL == p)
-		return(0);
 	if ( ! man_node_append(m, p))
 		return(0);
 	m->next = MAN_NEXT_CHILD;
@@ -293,13 +271,11 @@ man_head_alloc(struct man *m, int line, int pos, int t
 
 
 int
-man_body_alloc(struct man *m, int line, int pos, int tok)
+man_body_alloc(struct man *m, int line, int pos, enum mant tok)
 {
 	struct man_node *p;
 
 	p = man_node_alloc(line, pos, MAN_BODY, tok);
-	if (NULL == p)
-		return(0);
 	if ( ! man_node_append(m, p))
 		return(0);
 	m->next = MAN_NEXT_CHILD;
@@ -308,13 +284,11 @@ man_body_alloc(struct man *m, int line, int pos, int t
 
 
 int
-man_block_alloc(struct man *m, int line, int pos, int tok)
+man_block_alloc(struct man *m, int line, int pos, enum mant tok)
 {
 	struct man_node *p;
 
 	p = man_node_alloc(line, pos, MAN_BLOCK, tok);
-	if (NULL == p)
-		return(0);
 	if ( ! man_node_append(m, p))
 		return(0);
 	m->next = MAN_NEXT_CHILD;
@@ -322,118 +296,123 @@ man_block_alloc(struct man *m, int line, int pos, int 
 }
 
 
-static int
-pstring(struct man *m, int line, int pos, 
-		const char *p, size_t len)
+int
+man_word_alloc(struct man *m, int line, int pos, const char *word)
 {
 	struct man_node	*n;
-	size_t		 sv;
+	size_t		 sv, len;
 
-	n = man_node_alloc(line, pos, MAN_TEXT, -1);
-	if (NULL == n)
-		return(0);
+	len = strlen(word);
 
-	n->string = malloc(len + 1);
-	if (NULL == n->string) {
-		free(n);
-		return(0);
-	}
+	n = man_node_alloc(line, pos, MAN_TEXT, MAN_MAX);
+	n->string = mandoc_malloc(len + 1);
+	sv = strlcpy(n->string, word, len + 1);
 
-	sv = strlcpy(n->string, p, len + 1);
-
 	/* Prohibit truncation. */
 	assert(sv < len + 1);
 
 	if ( ! man_node_append(m, n))
 		return(0);
+
 	m->next = MAN_NEXT_SIBLING;
 	return(1);
 }
 
 
-int
-man_word_alloc(struct man *m, int line, int pos, const char *word)
-{
-
-	return(pstring(m, line, pos, word, strlen(word)));
-}
-
-
-void
+/*
+ * Free all of the resources held by a node.  This does NOT unlink a
+ * node from its context; for that, see man_node_unlink().
+ */
+static void
 man_node_free(struct man_node *p)
 {
 
 	if (p->string)
 		free(p->string);
-	if (p->parent)
-		p->parent->nchild--;
 	free(p);
 }
 
 
 void
-man_node_freelist(struct man_node *p)
+man_node_delete(struct man *m, struct man_node *p)
 {
-	struct man_node	*n;
 
-	if (p->child)
-		man_node_freelist(p->child);
-	assert(0 == p->nchild);
-	n = p->next;
+	while (p->child)
+		man_node_delete(m, p->child);
+
+	man_node_unlink(m, p);
 	man_node_free(p);
-	if (n)
-		man_node_freelist(n);
 }
 
 
 static int
-man_ptext(struct man *m, int line, char *buf)
+man_ptext(struct man *m, int line, char *buf, int offs)
 {
-	int		 i, j;
+	int		 i;
 
+	/* Ignore bogus comments. */
+
+	if ('\\' == buf[offs] && 
+			'.' == buf[offs + 1] && 
+			'"' == buf[offs + 2])
+		return(man_pmsg(m, line, offs, MANDOCERR_BADCOMMENT));
+
 	/* Literal free-form text whitespace is preserved. */
 
 	if (MAN_LITERAL & m->flags) {
-		if ( ! man_word_alloc(m, line, 0, buf))
+		if ( ! man_word_alloc(m, line, offs, buf + offs))
 			return(0);
 		goto descope;
 	}
 
-	/* First de-chunk and allocate words. */
+	/* Pump blank lines directly into the backend. */
 
-	for (i = 0; ' ' == buf[i]; i++)
+	for (i = offs; ' ' == buf[i]; i++)
 		/* Skip leading whitespace. */ ;
-	if (0 == buf[i]) {
-		if ( ! pstring(m, line, 0, &buf[i], 0))
+
+	if ('\0' == buf[i]) {
+		/* Allocate a blank entry. */
+		if ( ! man_word_alloc(m, line, offs, ""))
 			return(0);
 		goto descope;
 	}
 
-	for (j = i; buf[i]; i++) {
-		if (' ' != buf[i])
-			continue;
+	/* 
+	 * Warn if the last un-escaped character is whitespace. Then
+	 * strip away the remaining spaces (tabs stay!).   
+	 */
 
-		/* Escaped whitespace. */
-		if (i && ' ' == buf[i] && '\\' == buf[i - 1])
-			continue;
+	i = (int)strlen(buf);
+	assert(i);
 
-		buf[i++] = 0;
-		if ( ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
-			return(0);
+	if (' ' == buf[i - 1] || '\t' == buf[i - 1]) {
+		if (i > 1 && '\\' != buf[i - 2])
+			if ( ! man_pmsg(m, line, i - 1, MANDOCERR_EOLNSPACE))
+				return(0);
 
-		for ( ; ' ' == buf[i]; i++)
-			/* Skip trailing whitespace. */ ;
+		for (--i; i && ' ' == buf[i]; i--)
+			/* Spin back to non-space. */ ;
 
-		j = i;
-		if (0 == buf[i])
-			break;
+		/* Jump ahead of escaped whitespace. */
+		i += '\\' == buf[i] ? 2 : 1;
+
+		buf[i] = '\0';
 	}
 
-	if (j != i && ! pstring(m, line, j, &buf[j], (size_t)(i - j)))
+	if ( ! man_word_alloc(m, line, offs, buf + offs))
 		return(0);
 
-descope:
+	/*
+	 * End-of-sentence check.  If the last character is an unescaped
+	 * EOS character, then flag the node as being the end of a
+	 * sentence.  The front-end will know how to interpret this.
+	 */
 
+	assert(i);
+	if (mandoc_eos(buf, (size_t)i, 0))
+		m->last->flags |= MAN_EOS;
+
+descope:
 	/*
 	 * Co-ordinate what happens with having a next-line scope open:
 	 * first close out the element scope (if applicable), then close
@@ -442,7 +421,7 @@ descope:
 
 	if (MAN_ELINE & m->flags) {
 		m->flags &= ~MAN_ELINE;
-		if ( ! man_unscope(m, m->last->parent))
+		if ( ! man_unscope(m, m->last->parent, MANDOCERR_MAX))
 			return(0);
 	}
 
@@ -450,79 +429,75 @@ descope:
 		return(1);
 	m->flags &= ~MAN_BLINE;
 
-	if ( ! man_unscope(m, m->last->parent))
+	if ( ! man_unscope(m, m->last->parent, MANDOCERR_MAX))
 		return(0);
-	return(man_body_alloc(m, line, 0, m->last->tok));
+	return(man_body_alloc(m, line, offs, m->last->tok));
 }
 
 
 static int
-macrowarn(struct man *m, int ln, const char *buf)
+macrowarn(struct man *m, int ln, const char *buf, int offs)
 {
-	if ( ! (MAN_IGN_MACRO & m->pflags))
-		return(man_verr(m, ln, 0, 
-				"unknown macro: %s%s", 
-				buf, strlen(buf) > 3 ? "..." : ""));
-	return(man_vwarn(m, ln, 0, "unknown macro: %s%s",
-				buf, strlen(buf) > 3 ? "..." : ""));
+	int		 rc;
+
+	rc = man_vmsg(m, MANDOCERR_MACRO, ln, offs, 
+			"unknown macro: %s%s",
+			buf, strlen(buf) > 3 ? "..." : "");
+
+	return(MAN_IGN_MACRO & m->pflags ? rc : 0);
 }
 
 
 int
-man_pmacro(struct man *m, int ln, char *buf)
+man_pmacro(struct man *m, int ln, char *buf, int offs)
 {
-	int		 i, j, c, ppos, fl;
+	int		 i, j, ppos;
+	enum mant	 tok;
 	char		 mac[5];
 	struct man_node	*n;
 
 	/* Comments and empties are quickly ignored. */
 
-	fl = m->flags;
+	offs++;
 
-	if (0 == buf[1])
-		goto out;
+	if ('\0' == buf[offs])
+		return(1);
 
-	i = 1;
+	i = offs;
 
-	if (' ' == buf[i]) {
+	/*
+	 * Skip whitespace between the control character and initial
+	 * text.  "Whitespace" is both spaces and tabs.
+	 */
+
+	if (' ' == buf[i] || '\t' == buf[i]) {
 		i++;
-		while (buf[i] && ' ' == buf[i])
+		while (buf[i] && (' ' == buf[i] || '\t' == buf[i]))
 			i++;
-		if (0 == buf[i])
+		if ('\0' == buf[i])
 			goto out;
 	}
 
 	ppos = i;
 
-	/* Copy the first word into a nil-terminated buffer. */
+	/*
+	 * Copy the first word into a nil-terminated buffer.
+	 * Stop copying when a tab, space, or eoln is encountered.
+	 */
 
-	for (j = 0; j < 4; j++, i++) {
-		if (0 == (mac[j] = buf[i]))
-			break;
-		else if (' ' == buf[i])
-			break;
+	j = 0;
+	while (j < 4 && '\0' != buf[i] && ' ' != buf[i] && '\t' != buf[i])
+		mac[j++] = buf[i++];
+	mac[j] = '\0';
 
-		/* Check for invalid characters. */
-
-		if (isgraph((u_char)buf[i]))
-			continue;
-		return(man_perr(m, ln, i, WNPRINT));
-	}
-
-	mac[j] = 0;
-
 	if (j == 4 || j < 1) {
-		if ( ! (MAN_IGN_MACRO & m->pflags)) {
-			(void)man_perr(m, ln, ppos, WMACROFORM);
+		if ( ! macrowarn(m, ln, mac, ppos))
 			goto err;
-		} 
-		if ( ! man_pwarn(m, ln, ppos, WMACROFORM))
-			goto err;
 		return(1);
 	}
 	
-	if (MAN_MAX == (c = man_hash_find(mac))) {
-		if ( ! macrowarn(m, ln, mac))
+	if (MAN_MAX == (tok = man_hash_find(mac))) {
+		if ( ! macrowarn(m, ln, mac, ppos))
 			goto err;
 		return(1);
 	}
@@ -532,43 +507,89 @@ man_pmacro(struct man *m, int ln, char *buf)
 	while (buf[i] && ' ' == buf[i])
 		i++;
 
-	/* Remove prior ELINE macro, if applicable. */
+	/* 
+	 * Trailing whitespace.  Note that tabs are allowed to be passed
+	 * into the parser as "text", so we only warn about spaces here.
+	 */
 
-	if (m->flags & MAN_ELINE) {
+	if ('\0' == buf[i] && ' ' == buf[i - 1])
+		if ( ! man_pmsg(m, ln, i - 1, MANDOCERR_EOLNSPACE))
+			goto err;
+
+	/* 
+	 * Remove prior ELINE macro, as it's being clobbering by a new
+	 * macro.  Note that NSCOPED macros do not close out ELINE
+	 * macros---they don't print text---so we let those slip by.
+	 */
+
+	if ( ! (MAN_NSCOPED & man_macros[tok].flags) &&
+			m->flags & MAN_ELINE) {
+		assert(MAN_TEXT != m->last->type);
+
+		/*
+		 * This occurs in the following construction:
+		 *   .B
+		 *   .br
+		 *   .B
+		 *   .br
+		 *   I hate man macros.
+		 * Flat-out disallow this madness.
+		 */
+		if (MAN_NSCOPED & man_macros[m->last->tok].flags) {
+			man_pmsg(m, ln, ppos, MANDOCERR_SYNTLINESCOPE);
+			return(0);
+		}
+
 		n = m->last;
+
+		assert(n);
 		assert(NULL == n->child);
 		assert(0 == n->nchild);
-		if ( ! man_nwarn(m, n, WLNSCOPE))
+
+		if ( ! man_nmsg(m, n, MANDOCERR_LINESCOPE))
 			return(0);
 
-		if (n->prev) {
-			assert(n != n->parent->child);
-			assert(n == n->prev->next);
-			n->prev->next = NULL;
-			m->last = n->prev;
-			m->next = MAN_NEXT_SIBLING;
-		} else {
-			assert(n == n->parent->child);
-			n->parent->child = NULL;
-			m->last = n->parent;
-			m->next = MAN_NEXT_CHILD;
-		}
-
-		man_node_free(n);
+		man_node_delete(m, n);
 		m->flags &= ~MAN_ELINE;
 	}
 
-	/* Begin recursive parse sequence. */
+	/*
+	 * Save the fact that we're in the next-line for a block.  In
+	 * this way, embedded roff instructions can "remember" state
+	 * when they exit.
+	 */
 
-	assert(man_macros[c].fp);
+	if (MAN_BLINE & m->flags)
+		m->flags |= MAN_BPLINE;
 
-	if ( ! (*man_macros[c].fp)(m, c, ln, ppos, &i, buf))
+	/* Call to handler... */
+
+	assert(man_macros[tok].fp);
+	if ( ! (*man_macros[tok].fp)(m, tok, ln, ppos, &i, buf))
 		goto err;
 
 out:
-	if ( ! (MAN_BLINE & fl))
+	/* 
+	 * We weren't in a block-line scope when entering the
+	 * above-parsed macro, so return.
+	 */
+
+	if ( ! (MAN_BPLINE & m->flags)) {
+		m->flags &= ~MAN_ILINE; 
 		return(1);
+	}
+	m->flags &= ~MAN_BPLINE;
 
+	/*
+	 * If we're in a block scope, then allow this macro to slip by
+	 * without closing scope around it.
+	 */
+
+	if (MAN_ILINE & m->flags) {
+		m->flags &= ~MAN_ILINE;
+		return(1);
+	}
+
 	/* 
 	 * If we've opened a new next-line element scope, then return
 	 * now, as the next line will close out the block scope.
@@ -582,9 +603,9 @@ out:
 	assert(MAN_BLINE & m->flags);
 	m->flags &= ~MAN_BLINE;
 
-	if ( ! man_unscope(m, m->last->parent))
+	if ( ! man_unscope(m, m->last->parent, MANDOCERR_MAX))
 		return(0);
-	return(man_body_alloc(m, ln, 0, m->last->tok));
+	return(man_body_alloc(m, ln, offs, m->last->tok));
 
 err:	/* Error out. */
 
@@ -594,47 +615,56 @@ err:	/* Error out. */
 
 
 int
-man_verr(struct man *man, int ln, int pos, const char *fmt, ...)
+man_vmsg(struct man *man, enum mandocerr t, 
+		int ln, int pos, const char *fmt, ...)
 {
 	char		 buf[256];
 	va_list		 ap;
 
-	if (NULL == man->cb.man_err)
-		return(0);
-
 	va_start(ap, fmt);
-	(void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
+	vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
 	va_end(ap);
-	return((*man->cb.man_err)(man->data, ln, pos, buf));
+	return((*man->msg)(t, man->data, ln, pos, buf));
 }
 
 
-int
-man_vwarn(struct man *man, int ln, int pos, const char *fmt, ...)
+/*
+ * Unlink a node from its context.  If "m" is provided, the last parse
+ * point will also be adjusted accordingly.
+ */
+static void
+man_node_unlink(struct man *m, struct man_node *n)
 {
-	char		 buf[256];
-	va_list		 ap;
 
-	if (NULL == man->cb.man_warn)
-		return(0);
+	/* Adjust siblings. */
 
-	va_start(ap, fmt);
-	(void)vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
-	va_end(ap);
-	return((*man->cb.man_warn)(man->data, ln, pos, buf));
-}
+	if (n->prev)
+		n->prev->next = n->next;
+	if (n->next)
+		n->next->prev = n->prev;
 
+	/* Adjust parent. */
 
-int
-man_err(struct man *m, int line, int pos, int iserr, enum merr type)
-{
-	const char	 *p;
-	
-	p = __man_merrnames[(int)type];
-	assert(p);
+	if (n->parent) {
+		n->parent->nchild--;
+		if (n->parent->child == n)
+			n->parent->child = n->prev ? n->prev : n->next;
+	}
 
-	if (iserr)
-		return(man_verr(m, line, pos, p));
+	/* Adjust parse point, if applicable. */
 
-	return(man_vwarn(m, line, pos, p));
+	if (m && m->last == n) {
+		/*XXX: this can occur when bailing from validation. */
+		/*assert(NULL == n->next);*/
+		if (n->prev) {
+			m->last = n->prev;
+			m->next = MAN_NEXT_SIBLING;
+		} else {
+			m->last = n->parent;
+			m->next = MAN_NEXT_CHILD;
+		}
+	}
+
+	if (m && m->first == n)
+		m->first = NULL;
 }