Clean up the warnings related to document structure.

[mandoc.git] / mdoc.c

diff --git a/mdoc.c b/mdoc.c
index 1fb6372d5eeb68586460190e24d6c23d1420cb4b..04e9d9724864e1881dfb1ce71e1d557f78d9e26f 100644 (file)
--- a/mdoc.c
+++ b/mdoc.c
@@ -1,6 +1,7 @@
-/*     $Id: mdoc.c,v 1.136 2010/05/17 22:11:42 kristaps Exp $ */
+/*     $Id: mdoc.c,v 1.216 2014/07/01 22:37:15 schwarze Exp $ */

 /*
 /*

- * Copyright (c) 2008, 2009 Kristaps Dzonsons <kristaps@kth.se>
+ * Copyright (c) 2008, 2009, 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
+ * Copyright (c) 2010, 2012, 2013, 2014 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
  *
  * Permission to use, copy, modify, and distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above


@@ -28,11 +29,13 @@
 #include <string.h>
 #include <time.h>
 
 #include <string.h>
 #include <time.h>
 

+#include "mdoc.h"

 #include "mandoc.h"
 #include "mandoc.h"

+#include "mandoc_aux.h"

 #include "libmdoc.h"
 #include "libmandoc.h"
 
 #include "libmdoc.h"
 #include "libmandoc.h"
 

-const  char *const __mdoc_macronames[MDOC_MAX] = {              
+const  char *const __mdoc_macronames[MDOC_MAX + 1] = {

        "Ap",           "Dd",           "Dt",           "Os",
        "Sh",           "Ss",           "Pp",           "D1",
        "Dl",           "Bd",           "Ed",           "Bl",
        "Ap",           "Dd",           "Dt",           "Os",
        "Sh",           "Ss",           "Pp",           "D1",
        "Dl",           "Bd",           "Ed",           "Bl",


@@ -43,11 +46,8 @@ const        char *const __mdoc_macronames[MDOC_MAX] = {
        "Ic",           "In",           "Li",           "Nd",
        "Nm",           "Op",           "Ot",           "Pa",
        "Rv",           "St",           "Va",           "Vt",
        "Ic",           "In",           "Li",           "Nd",
        "Nm",           "Op",           "Ot",           "Pa",
        "Rv",           "St",           "Va",           "Vt",

-       /* LINTED */

        "Xr",           "%A",           "%B",           "%D",
        "Xr",           "%A",           "%B",           "%D",

-       /* LINTED */

        "%I",           "%J",           "%N",           "%O",
        "%I",           "%J",           "%N",           "%O",

-       /* LINTED */

        "%P",           "%R",           "%T",           "%V",
        "Ac",           "Ao",           "Aq",           "At",
        "Bc",           "Bf",           "Bo",           "Bq",
        "%P",           "%R",           "%T",           "%V",
        "Ac",           "Ao",           "Aq",           "At",
        "Bc",           "Bf",           "Bo",           "Bq",


@@ -64,22 +64,19 @@ const       char *const __mdoc_macronames[MDOC_MAX] = {
        "Bk",           "Ek",           "Bt",           "Hf",
        "Fr",           "Ud",           "Lb",           "Lp",
        "Lk",           "Mt",           "Brq",          "Bro",
        "Bk",           "Ek",           "Bt",           "Hf",
        "Fr",           "Ud",           "Lb",           "Lp",
        "Lk",           "Mt",           "Brq",          "Bro",

-       /* LINTED */

        "Brc",          "%C",           "Es",           "En",
        "Brc",          "%C",           "Es",           "En",

-       /* LINTED */

        "Dx",           "%Q",           "br",           "sp",
        "Dx",           "%Q",           "br",           "sp",

-       /* LINTED */
-       "%U"
+       "%U",           "Ta",           "ll",           "text",

        };
 
        };
 

-const  char *const __mdoc_argnames[MDOC_ARG_MAX] = {            
+const  char *const __mdoc_argnames[MDOC_ARG_MAX] = {

        "split",                "nosplit",              "ragged",
        "split",                "nosplit",              "ragged",

-       "unfilled",             "literal",              "file",          
-       "offset",               "bullet",               "dash",          
-       "hyphen",               "item",                 "enum",          
-       "tag",                  "diag",                 "hang",          
-       "ohang",                "inset",                "column",        
-       "width",                "compact",              "std",   
+       "unfilled",             "literal",              "file",
+       "offset",               "bullet",               "dash",
+       "hyphen",               "item",                 "enum",
+       "tag",                  "diag",                 "hang",
+       "ohang",                "inset",                "column",
+       "width",                "compact",              "std",

        "filled",               "words",                "emphasis",
        "symbolic",             "nested",               "centered"
        };
        "filled",               "words",                "emphasis",
        "symbolic",             "nested",               "centered"
        };


@@ -88,36 +85,37 @@ const       char * const *mdoc_macronames = __mdoc_macronames;
 const  char * const *mdoc_argnames = __mdoc_argnames;
 
 static void              mdoc_node_free(struct mdoc_node *);
 const  char * const *mdoc_argnames = __mdoc_argnames;
 
 static void              mdoc_node_free(struct mdoc_node *);

-static void              mdoc_node_unlink(struct mdoc *, 
+static void              mdoc_node_unlink(struct mdoc *,

                                struct mdoc_node *);
 static void              mdoc_free1(struct mdoc *);
 static void              mdoc_alloc1(struct mdoc *);
                                struct mdoc_node *);
 static void              mdoc_free1(struct mdoc *);
 static void              mdoc_alloc1(struct mdoc *);

-static struct mdoc_node *node_alloc(struct mdoc *, int, int, 
+static struct mdoc_node *node_alloc(struct mdoc *, int, int,

                                enum mdoct, enum mdoc_type);
                                enum mdoct, enum mdoc_type);

-static int               node_append(struct mdoc *, 
+static int               node_append(struct mdoc *,

                                struct mdoc_node *);
                                struct mdoc_node *);

+#if 0
+static int               mdoc_preptext(struct mdoc *, int, char *, int);
+#endif

 static int               mdoc_ptext(struct mdoc *, int, char *, int);
 static int               mdoc_pmacro(struct mdoc *, int, char *, int);
 static int               mdoc_ptext(struct mdoc *, int, char *, int);
 static int               mdoc_pmacro(struct mdoc *, int, char *, int);

-static int               macrowarn(struct mdoc *, int, 
-                               const char *, int);

 
 
 const struct mdoc_node *
 
 
 const struct mdoc_node *

-mdoc_node(const struct mdoc *m)
+mdoc_node(const struct mdoc *mdoc)

 {
 
 {
 

-       return(MDOC_HALT & m->flags ? NULL : m->first);
+       assert( ! (MDOC_HALT & mdoc->flags));
+       return(mdoc->first);

 }
 
 }
 

-

 const struct mdoc_meta *
 const struct mdoc_meta *

-mdoc_meta(const struct mdoc *m)
+mdoc_meta(const struct mdoc *mdoc)

 {
 
 {
 

-       return(MDOC_HALT & m->flags ? NULL : &m->meta);
+       assert( ! (MDOC_HALT & mdoc->flags));
+       return(&mdoc->meta);

 }
 
 }
 

-

 /*
  * Frees volatile resources (parse tree, meta-data, fields).
  */
 /*
  * Frees volatile resources (parse tree, meta-data, fields).
  */


@@ -139,9 +137,10 @@ mdoc_free1(struct mdoc *mdoc)
                free(mdoc->meta.vol);
        if (mdoc->meta.msec)
                free(mdoc->meta.msec);
                free(mdoc->meta.vol);
        if (mdoc->meta.msec)
                free(mdoc->meta.msec);

+       if (mdoc->meta.date)
+               free(mdoc->meta.date);

 }
 
 }
 

-

 /*
  * Allocate all volatile resources (parse tree, meta-data, fields).
  */
 /*
  * Allocate all volatile resources (parse tree, meta-data, fields).
  */


@@ -155,10 +154,10 @@ mdoc_alloc1(struct mdoc *mdoc)
        mdoc->last = mandoc_calloc(1, sizeof(struct mdoc_node));
        mdoc->first = mdoc->last;
        mdoc->last->type = MDOC_ROOT;
        mdoc->last = mandoc_calloc(1, sizeof(struct mdoc_node));
        mdoc->first = mdoc->last;
        mdoc->last->type = MDOC_ROOT;

+       mdoc->last->tok = MDOC_MAX;

        mdoc->next = MDOC_NEXT_CHILD;
 }
 
        mdoc->next = MDOC_NEXT_CHILD;
 }
 

-

 /*
  * Free up volatile resources (see mdoc_free1()) then re-initialises the
  * data with mdoc_alloc1().  After invocation, parse data has been reset
 /*
  * Free up volatile resources (see mdoc_free1()) then re-initialises the
  * data with mdoc_alloc1().  After invocation, parse data has been reset


@@ -173,7 +172,6 @@ mdoc_reset(struct mdoc *mdoc)
        mdoc_alloc1(mdoc);
 }
 
        mdoc_alloc1(mdoc);
 }
 

-

 /*
  * Completely free up all volatile and non-volatile parse resources.
  * After invocation, the pointer is no longer usable.
 /*
  * Completely free up all volatile and non-volatile parse resources.
  * After invocation, the pointer is no longer usable.


@@ -186,107 +184,153 @@ mdoc_free(struct mdoc *mdoc)
        free(mdoc);
 }
 
        free(mdoc);
 }
 

-

 /*
 /*

- * Allocate volatile and non-volatile parse resources.  
+ * Allocate volatile and non-volatile parse resources.

  */
 struct mdoc *
  */
 struct mdoc *

-mdoc_alloc(void *data, int pflags, mandocmsg msg)
+mdoc_alloc(struct roff *roff, struct mparse *parse,
+       char *defos, int quick)

 {
        struct mdoc     *p;
 
        p = mandoc_calloc(1, sizeof(struct mdoc));
 
 {
        struct mdoc     *p;
 
        p = mandoc_calloc(1, sizeof(struct mdoc));
 

-       p->msg = msg;
-       p->data = data;
-       p->pflags = pflags;
+       p->parse = parse;
+       p->defos = defos;
+       p->quick = quick;
+       p->roff = roff;

 
        mdoc_hash_init();
        mdoc_alloc1(p);
        return(p);
 }
 
 
        mdoc_hash_init();
        mdoc_alloc1(p);
        return(p);
 }
 

-

 /*
  * Climb back up the parse tree, validating open scopes.  Mostly calls
  * through to macro_end() in macro.c.
  */
 int
 /*
  * Climb back up the parse tree, validating open scopes.  Mostly calls
  * through to macro_end() in macro.c.
  */
 int

-mdoc_endparse(struct mdoc *m)
+mdoc_endparse(struct mdoc *mdoc)

 {
 
 {
 

-       if (MDOC_HALT & m->flags)
-               return(0);
-       else if (mdoc_macroend(m))
+       assert( ! (MDOC_HALT & mdoc->flags));
+       if (mdoc_macroend(mdoc))

                return(1);
                return(1);

-       m->flags |= MDOC_HALT;
+       mdoc->flags |= MDOC_HALT;

        return(0);
 }
 
        return(0);
 }
 

-
-/*
- * Main parse routine.  Parses a single line -- really just hands off to
- * the macro (mdoc_pmacro()) or text parser (mdoc_ptext()).
- */

 int
 int

-mdoc_parseln(struct mdoc *m, int ln, char *buf, int offs)
+mdoc_addeqn(struct mdoc *mdoc, const struct eqn *ep)

 {
 {

+       struct mdoc_node *n;

 
 

-       if (MDOC_HALT & m->flags)
+       assert( ! (MDOC_HALT & mdoc->flags));
+
+       /* No text before an initial macro. */
+
+       if (SEC_NONE == mdoc->lastnamed) {
+               mdoc_pmsg(mdoc, ep->ln, ep->pos, MANDOCERR_NOTEXT);
+               return(1);
+       }
+
+       n = node_alloc(mdoc, ep->ln, ep->pos, MDOC_MAX, MDOC_EQN);
+       n->eqn = ep;
+
+       if ( ! node_append(mdoc, n))

                return(0);
 
                return(0);
 

-       m->flags |= MDOC_NEWLINE;
-       return(('.' == buf[offs] || '\'' == buf[offs]) ? 
-                       mdoc_pmacro(m, ln, buf, offs) :
-                       mdoc_ptext(m, ln, buf, offs));
+       mdoc->next = MDOC_NEXT_SIBLING;
+       return(1);

 }
 
 }
 

-

 int
 int

-mdoc_vmsg(struct mdoc *mdoc, enum mandocerr t, 
-               int ln, int pos, const char *fmt, ...)
+mdoc_addspan(struct mdoc *mdoc, const struct tbl_span *sp)

 {
 {

-       char             buf[256];
-       va_list          ap;
+       struct mdoc_node *n;

 
 

-       va_start(ap, fmt);
-       vsnprintf(buf, sizeof(buf) - 1, fmt, ap);
-       va_end(ap);
+       assert( ! (MDOC_HALT & mdoc->flags));
+
+       /* No text before an initial macro. */
+
+       if (SEC_NONE == mdoc->lastnamed) {
+               mdoc_pmsg(mdoc, sp->line, 0, MANDOCERR_NOTEXT);
+               return(1);
+       }

 
 

-       return((*mdoc->msg)(t, mdoc->data, ln, pos, buf));
+       n = node_alloc(mdoc, sp->line, 0, MDOC_MAX, MDOC_TBL);
+       n->span = sp;
+
+       if ( ! node_append(mdoc, n))
+               return(0);
+
+       mdoc->next = MDOC_NEXT_SIBLING;
+       return(1);

 }
 
 }
 

+/*
+ * Main parse routine.  Parses a single line -- really just hands off to
+ * the macro (mdoc_pmacro()) or text parser (mdoc_ptext()).
+ */
+int
+mdoc_parseln(struct mdoc *mdoc, int ln, char *buf, int offs)
+{
+
+       assert( ! (MDOC_HALT & mdoc->flags));
+
+       mdoc->flags |= MDOC_NEWLINE;
+
+       /*
+        * Let the roff nS register switch SYNOPSIS mode early,
+        * such that the parser knows at all times
+        * whether this mode is on or off.
+        * Note that this mode is also switched by the Sh macro.
+        */
+       if (roff_getreg(mdoc->roff, "nS"))
+               mdoc->flags |= MDOC_SYNOPSIS;
+       else
+               mdoc->flags &= ~MDOC_SYNOPSIS;
+
+       return(roff_getcontrol(mdoc->roff, buf, &offs) ?
+           mdoc_pmacro(mdoc, ln, buf, offs) :
+           mdoc_ptext(mdoc, ln, buf, offs));
+}

 
 int
 
 int

-mdoc_macro(struct mdoc *m, enum mdoct tok, 
-               int ln, int pp, int *pos, char *buf)
+mdoc_macro(MACRO_PROT_ARGS)

 {
        assert(tok < MDOC_MAX);
 
        /* If we're in the body, deny prologue calls. */
 
 {
        assert(tok < MDOC_MAX);
 
        /* If we're in the body, deny prologue calls. */
 

-       if (MDOC_PROLOGUE & mdoc_macros[tok].flags && 
-                       MDOC_PBODY & m->flags)
-               return(mdoc_pmsg(m, ln, pp, MANDOCERR_BADBODY));
+       if (MDOC_PROLOGUE & mdoc_macros[tok].flags &&
+           MDOC_PBODY & mdoc->flags) {
+               mandoc_vmsg(MANDOCERR_PROLOG_ONLY, mdoc->parse,
+                   line, ppos, "%s", mdoc_macronames[tok]);
+               return(1);
+       }

 
        /* If we're in the prologue, deny "body" macros.  */
 
 
        /* If we're in the prologue, deny "body" macros.  */
 

-       if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) && 
-                       ! (MDOC_PBODY & m->flags)) {
-               if ( ! mdoc_pmsg(m, ln, pp, MANDOCERR_BADPROLOG))
-                       return(0);
-               if (NULL == m->meta.title)
-                       m->meta.title = mandoc_strdup("unknown");
-               if (NULL == m->meta.vol)
-                       m->meta.vol = mandoc_strdup("local");
-               if (NULL == m->meta.os)
-                       m->meta.os = mandoc_strdup("local");
-               if (0 == m->meta.date)
-                       m->meta.date = time(NULL);
-               m->flags |= MDOC_PBODY;
+       if ( ! (MDOC_PROLOGUE & mdoc_macros[tok].flags) &&
+            ! (MDOC_PBODY & mdoc->flags)) {
+               mandoc_vmsg(MANDOCERR_PROLOG_BAD, mdoc->parse,
+                   line, ppos, "%s", mdoc_macronames[tok]);
+               if (NULL == mdoc->meta.msec)
+                       mdoc->meta.msec = mandoc_strdup("1");
+               if (NULL == mdoc->meta.title)
+                       mdoc->meta.title = mandoc_strdup("UNKNOWN");
+               if (NULL == mdoc->meta.vol)
+                       mdoc->meta.vol = mandoc_strdup("LOCAL");
+               if (NULL == mdoc->meta.os)
+                       mdoc->meta.os = mandoc_strdup("LOCAL");
+               if (NULL == mdoc->meta.date)
+                       mdoc->meta.date = mandoc_normdate
+                               (mdoc->parse, NULL, line, ppos);
+               mdoc->flags |= MDOC_PBODY;

        }
 
        }
 

-       return((*mdoc_macros[tok].fp)(m, tok, ln, pp, pos, buf));
+       return((*mdoc_macros[tok].fp)(mdoc, tok, line, ppos, pos, buf));

 }
 
 
 }
 
 


@@ -299,12 +343,12 @@ node_append(struct mdoc *mdoc, struct mdoc_node *p)
        assert(MDOC_ROOT != p->type);
 
        switch (mdoc->next) {
        assert(MDOC_ROOT != p->type);
 
        switch (mdoc->next) {

-       case (MDOC_NEXT_SIBLING):
+       case MDOC_NEXT_SIBLING:

                mdoc->last->next = p;
                p->prev = mdoc->last;
                p->parent = mdoc->last->parent;
                break;
                mdoc->last->next = p;
                p->prev = mdoc->last;
                p->parent = mdoc->last->parent;
                break;

-       case (MDOC_NEXT_CHILD):
+       case MDOC_NEXT_CHILD:

                mdoc->last->child = p;
                p->parent = mdoc->last;
                break;
                mdoc->last->child = p;
                p->parent = mdoc->last;
                break;


@@ -315,21 +359,40 @@ node_append(struct mdoc *mdoc, struct mdoc_node *p)
 
        p->parent->nchild++;
 
 
        p->parent->nchild++;
 

+       /*
+        * Copy over the normalised-data pointer of our parent.  Not
+        * everybody has one, but copying a null pointer is fine.
+        */
+
+       switch (p->type) {
+       case MDOC_BODY:
+               if (ENDBODY_NOT != p->end)
+                       break;
+               /* FALLTHROUGH */
+       case MDOC_TAIL:
+               /* FALLTHROUGH */
+       case MDOC_HEAD:
+               p->norm = p->parent->norm;
+               break;
+       default:
+               break;
+       }
+

        if ( ! mdoc_valid_pre(mdoc, p))
                return(0);
        if ( ! mdoc_valid_pre(mdoc, p))
                return(0);

-       if ( ! mdoc_action_pre(mdoc, p))
-               return(0);

 
        switch (p->type) {
 
        switch (p->type) {

-       case (MDOC_HEAD):
+       case MDOC_HEAD:

                assert(MDOC_BLOCK == p->parent->type);
                p->parent->head = p;
                break;
                assert(MDOC_BLOCK == p->parent->type);
                p->parent->head = p;
                break;

-       case (MDOC_TAIL):
+       case MDOC_TAIL:

                assert(MDOC_BLOCK == p->parent->type);
                p->parent->tail = p;
                break;
                assert(MDOC_BLOCK == p->parent->type);
                p->parent->tail = p;
                break;

-       case (MDOC_BODY):
+       case MDOC_BODY:
+               if (p->end)
+                       break;

                assert(MDOC_BLOCK == p->parent->type);
                p->parent->body = p;
                break;
                assert(MDOC_BLOCK == p->parent->type);
                p->parent->body = p;
                break;


@@ -340,11 +403,11 @@ node_append(struct mdoc *mdoc, struct mdoc_node *p)
        mdoc->last = p;
 
        switch (p->type) {
        mdoc->last = p;
 
        switch (p->type) {

-       case (MDOC_TEXT):
+       case MDOC_TBL:
+               /* FALLTHROUGH */
+       case MDOC_TEXT:

                if ( ! mdoc_valid_post(mdoc))
                        return(0);
                if ( ! mdoc_valid_post(mdoc))
                        return(0);

-               if ( ! mdoc_action_post(mdoc))
-                       return(0);

                break;
        default:
                break;
                break;
        default:
                break;


@@ -353,129 +416,180 @@ node_append(struct mdoc *mdoc, struct mdoc_node *p)
        return(1);
 }
 
        return(1);
 }
 

-

 static struct mdoc_node *
 static struct mdoc_node *

-node_alloc(struct mdoc *m, int line, int pos, 
+node_alloc(struct mdoc *mdoc, int line, int pos,

                enum mdoct tok, enum mdoc_type type)
 {
        struct mdoc_node *p;
 
        p = mandoc_calloc(1, sizeof(struct mdoc_node));
                enum mdoct tok, enum mdoc_type type)
 {
        struct mdoc_node *p;
 
        p = mandoc_calloc(1, sizeof(struct mdoc_node));

-       p->sec = m->lastsec;
+       p->sec = mdoc->lastsec;

        p->line = line;
        p->pos = pos;
        p->line = line;
        p->pos = pos;

+       p->lastline = line;

        p->tok = tok;
        p->type = type;
        p->tok = tok;
        p->type = type;

-       if (MDOC_NEWLINE & m->flags)
+
+       /* Flag analysis. */
+
+       if (MDOC_SYNOPSIS & mdoc->flags)
+               p->flags |= MDOC_SYNPRETTY;
+       else
+               p->flags &= ~MDOC_SYNPRETTY;
+       if (MDOC_NEWLINE & mdoc->flags)

                p->flags |= MDOC_LINE;
                p->flags |= MDOC_LINE;

-       m->flags &= ~MDOC_NEWLINE;
+       mdoc->flags &= ~MDOC_NEWLINE;
+

        return(p);
 }
 
        return(p);
 }
 

-

 int
 int

-mdoc_tail_alloc(struct mdoc *m, int line, int pos, enum mdoct tok)
+mdoc_tail_alloc(struct mdoc *mdoc, int line, int pos, enum mdoct tok)

 {
        struct mdoc_node *p;
 
 {
        struct mdoc_node *p;
 

-       p = node_alloc(m, line, pos, tok, MDOC_TAIL);
-       if ( ! node_append(m, p))
+       p = node_alloc(mdoc, line, pos, tok, MDOC_TAIL);
+       if ( ! node_append(mdoc, p))

                return(0);
                return(0);

-       m->next = MDOC_NEXT_CHILD;
+       mdoc->next = MDOC_NEXT_CHILD;

        return(1);
 }
 
        return(1);
 }
 

-

 int
 int

-mdoc_head_alloc(struct mdoc *m, int line, int pos, enum mdoct tok)
+mdoc_head_alloc(struct mdoc *mdoc, int line, int pos, enum mdoct tok)

 {
        struct mdoc_node *p;
 
 {
        struct mdoc_node *p;
 

-       assert(m->first);
-       assert(m->last);
+       assert(mdoc->first);
+       assert(mdoc->last);

 
 

-       p = node_alloc(m, line, pos, tok, MDOC_HEAD);
-       if ( ! node_append(m, p))
+       p = node_alloc(mdoc, line, pos, tok, MDOC_HEAD);
+       if ( ! node_append(mdoc, p))

                return(0);
                return(0);

-       m->next = MDOC_NEXT_CHILD;
+       mdoc->next = MDOC_NEXT_CHILD;

        return(1);
 }
 
        return(1);
 }
 

-

 int
 int

-mdoc_body_alloc(struct mdoc *m, int line, int pos, enum mdoct tok)
+mdoc_body_alloc(struct mdoc *mdoc, int line, int pos, enum mdoct tok)

 {
        struct mdoc_node *p;
 
 {
        struct mdoc_node *p;
 

-       p = node_alloc(m, line, pos, tok, MDOC_BODY);
-       if ( ! node_append(m, p))
+       p = node_alloc(mdoc, line, pos, tok, MDOC_BODY);
+       if ( ! node_append(mdoc, p))

                return(0);
                return(0);

-       m->next = MDOC_NEXT_CHILD;
+       mdoc->next = MDOC_NEXT_CHILD;

        return(1);
 }
 
        return(1);
 }
 

+int
+mdoc_endbody_alloc(struct mdoc *mdoc, int line, int pos, enum mdoct tok,
+               struct mdoc_node *body, enum mdoc_endbody end)
+{
+       struct mdoc_node *p;
+
+       p = node_alloc(mdoc, line, pos, tok, MDOC_BODY);
+       p->pending = body;
+       p->norm = body->norm;
+       p->end = end;
+       if ( ! node_append(mdoc, p))
+               return(0);
+       mdoc->next = MDOC_NEXT_SIBLING;
+       return(1);
+}

 
 int
 
 int

-mdoc_block_alloc(struct mdoc *m, int line, int pos, 
+mdoc_block_alloc(struct mdoc *mdoc, int line, int pos,

                enum mdoct tok, struct mdoc_arg *args)
 {
        struct mdoc_node *p;
 
                enum mdoct tok, struct mdoc_arg *args)
 {
        struct mdoc_node *p;
 

-       p = node_alloc(m, line, pos, tok, MDOC_BLOCK);
+       p = node_alloc(mdoc, line, pos, tok, MDOC_BLOCK);

        p->args = args;
        if (p->args)
                (args->refcnt)++;
        p->args = args;
        if (p->args)
                (args->refcnt)++;

-       if ( ! node_append(m, p))
+
+       switch (tok) {
+       case MDOC_Bd:
+               /* FALLTHROUGH */
+       case MDOC_Bf:
+               /* FALLTHROUGH */
+       case MDOC_Bl:
+               /* FALLTHROUGH */
+       case MDOC_Rs:
+               p->norm = mandoc_calloc(1, sizeof(union mdoc_data));
+               break;
+       default:
+               break;
+       }
+
+       if ( ! node_append(mdoc, p))

                return(0);
                return(0);

-       m->next = MDOC_NEXT_CHILD;
+       mdoc->next = MDOC_NEXT_CHILD;

        return(1);
 }
 
        return(1);
 }
 

-

 int
 int

-mdoc_elem_alloc(struct mdoc *m, int line, int pos, 
+mdoc_elem_alloc(struct mdoc *mdoc, int line, int pos,

                enum mdoct tok, struct mdoc_arg *args)
 {
        struct mdoc_node *p;
 
                enum mdoct tok, struct mdoc_arg *args)
 {
        struct mdoc_node *p;
 

-       p = node_alloc(m, line, pos, tok, MDOC_ELEM);
+       p = node_alloc(mdoc, line, pos, tok, MDOC_ELEM);

        p->args = args;
        if (p->args)
                (args->refcnt)++;
        p->args = args;
        if (p->args)
                (args->refcnt)++;

-       if ( ! node_append(m, p))
+
+       switch (tok) {
+       case MDOC_An:
+               p->norm = mandoc_calloc(1, sizeof(union mdoc_data));
+               break;
+       default:
+               break;
+       }
+
+       if ( ! node_append(mdoc, p))

                return(0);
                return(0);

-       m->next = MDOC_NEXT_CHILD;
+       mdoc->next = MDOC_NEXT_CHILD;

        return(1);
 }
 
        return(1);
 }
 

-

 int
 int

-mdoc_word_alloc(struct mdoc *m, int line, int pos, const char *p)
+mdoc_word_alloc(struct mdoc *mdoc, int line, int pos, const char *p)

 {
        struct mdoc_node *n;
 {
        struct mdoc_node *n;

-       size_t            sv, len;
-
-       len = strlen(p);

 
 

-       n = node_alloc(m, line, pos, MDOC_MAX, MDOC_TEXT);
-       n->string = mandoc_malloc(len + 1);
-       sv = strlcpy(n->string, p, len + 1);
+       n = node_alloc(mdoc, line, pos, MDOC_MAX, MDOC_TEXT);
+       n->string = roff_strdup(mdoc->roff, p);

 
 

-       /* Prohibit truncation. */
-       assert(sv < len + 1);
-
-       if ( ! node_append(m, n))
+       if ( ! node_append(mdoc, n))

                return(0);
 
                return(0);
 

-       m->next = MDOC_NEXT_SIBLING;
+       mdoc->next = MDOC_NEXT_SIBLING;

        return(1);
 }
 
        return(1);
 }
 

-

 void
 void

+mdoc_word_append(struct mdoc *mdoc, const char *p)
+{
+       struct mdoc_node        *n;
+       char                    *addstr, *newstr;
+
+       n = mdoc->last;
+       addstr = roff_strdup(mdoc->roff, p);
+       mandoc_asprintf(&newstr, "%s %s", n->string, addstr);
+       free(addstr);
+       free(n->string);
+       n->string = newstr;
+       mdoc->next = MDOC_NEXT_SIBLING;
+}
+
+static void

 mdoc_node_free(struct mdoc_node *p)
 {
 
 mdoc_node_free(struct mdoc_node *p)
 {
 

+       if (MDOC_BLOCK == p->type || MDOC_ELEM == p->type)
+               free(p->norm);

        if (p->string)
                free(p->string);
        if (p->args)
        if (p->string)
                free(p->string);
        if (p->args)


@@ -483,9 +597,8 @@ mdoc_node_free(struct mdoc_node *p)
        free(p);
 }
 
        free(p);
 }
 

-

 static void
 static void

-mdoc_node_unlink(struct mdoc *m, struct mdoc_node *n)
+mdoc_node_unlink(struct mdoc *mdoc, struct mdoc_node *n)

 {
 
        /* Adjust siblings. */
 {
 
        /* Adjust siblings. */


@@ -501,232 +614,428 @@ mdoc_node_unlink(struct mdoc *m, struct mdoc_node *n)
                n->parent->nchild--;
                if (n->parent->child == n)
                        n->parent->child = n->prev ? n->prev : n->next;
                n->parent->nchild--;
                if (n->parent->child == n)
                        n->parent->child = n->prev ? n->prev : n->next;

+               if (n->parent->last == n)
+                       n->parent->last = n->prev ? n->prev : NULL;

        }
 
        /* Adjust parse point, if applicable. */
 
        }
 
        /* Adjust parse point, if applicable. */
 

-       if (m && m->last == n) {
+       if (mdoc && mdoc->last == n) {

                if (n->prev) {
                if (n->prev) {

-                       m->last = n->prev;
-                       m->next = MDOC_NEXT_SIBLING;
+                       mdoc->last = n->prev;
+                       mdoc->next = MDOC_NEXT_SIBLING;

                } else {
                } else {

-                       m->last = n->parent;
-                       m->next = MDOC_NEXT_CHILD;
+                       mdoc->last = n->parent;
+                       mdoc->next = MDOC_NEXT_CHILD;

                }
        }
 
                }
        }
 

-       if (m && m->first == n)
-               m->first = NULL;
+       if (mdoc && mdoc->first == n)
+               mdoc->first = NULL;

 }
 
 }
 

-

 void
 void

-mdoc_node_delete(struct mdoc *m, struct mdoc_node *p)
+mdoc_node_delete(struct mdoc *mdoc, struct mdoc_node *p)

 {
 
        while (p->child) {
                assert(p->nchild);
 {
 
        while (p->child) {
                assert(p->nchild);

-               mdoc_node_delete(m, p->child);
+               mdoc_node_delete(mdoc, p->child);

        }
        assert(0 == p->nchild);
 
        }
        assert(0 == p->nchild);
 

-       mdoc_node_unlink(m, p);
+       mdoc_node_unlink(mdoc, p);

        mdoc_node_free(p);
 }
 
        mdoc_node_free(p);
 }
 

+int
+mdoc_node_relink(struct mdoc *mdoc, struct mdoc_node *p)
+{
+
+       mdoc_node_unlink(mdoc, p);
+       return(node_append(mdoc, p));
+}

 
 

+#if 0

 /*
 /*

- * Parse free-form text, that is, a line that does not begin with the
- * control character.
+ * Pre-treat a text line.
+ * Text lines can consist of equations, which must be handled apart from
+ * the regular text.
+ * Thus, use this function to step through a line checking if it has any
+ * equations embedded in it.
+ * This must handle multiple equations AND equations that do not end at
+ * the end-of-line, i.e., will re-enter in the next roff parse.

  */
 static int
  */
 static int

-mdoc_ptext(struct mdoc *m, int line, char *buf, int offs)
+mdoc_preptext(struct mdoc *mdoc, int line, char *buf, int offs)

 {
 {

-       int              i;
+       char            *start, *end;
+       char             delim;
+
+       while ('\0' != buf[offs]) {
+               /* Mark starting position if eqn is set. */
+               start = NULL;
+               if ('\0' != (delim = roff_eqndelim(mdoc->roff)))
+                       if (NULL != (start = strchr(buf + offs, delim)))
+                               *start++ = '\0';
+
+               /* Parse text as normal. */
+               if ( ! mdoc_ptext(mdoc, line, buf, offs))
+                       return(0);

 
 

-       /* Ignore bogus comments. */
+               /* Continue only if an equation exists. */
+               if (NULL == start)
+                       break;

 
 

-       if ('\\' == buf[offs] && 
-                       '.' == buf[offs + 1] && 
-                       '"' == buf[offs + 2])
-               return(mdoc_pmsg(m, line, offs, MANDOCERR_BADCOMMENT));
+               /* Read past the end of the equation. */
+               offs += start - (buf + offs);
+               assert(start == &buf[offs]);
+               if (NULL != (end = strchr(buf + offs, delim))) {
+                       *end++ = '\0';
+                       while (' ' == *end)
+                               end++;
+               }

 
 

-       /* No text before an initial macro. */
+               /* Parse the equation itself. */
+               roff_openeqn(mdoc->roff, NULL, line, offs, buf);

 
 

-       if (SEC_NONE == m->lastnamed)
-               return(mdoc_pmsg(m, line, offs, MANDOCERR_NOTEXT));
+               /* Process a finished equation? */
+               if (roff_closeeqn(mdoc->roff))
+                       if ( ! mdoc_addeqn(mdoc, roff_eqn(mdoc->roff)))
+                               return(0);
+               offs += (end - (buf + offs));
+       }

 
 

-       /* Literal just gets pulled in as-is. */
-       
-       if (MDOC_LITERAL & m->flags)
-               return(mdoc_word_alloc(m, line, offs, buf + offs));
+       return(1);
+}
+#endif

 
 

-       /* Check for a blank line, which may also consist of spaces. */
+/*
+ * Parse free-form text, that is, a line that does not begin with the
+ * control character.
+ */
+static int
+mdoc_ptext(struct mdoc *mdoc, int line, char *buf, int offs)
+{
+       char             *c, *ws, *end;
+       struct mdoc_node *n;

 
 

-       for (i = offs; ' ' == buf[i]; i++)
-               /* Skip to first non-space. */ ;
+       /* No text before an initial macro. */

 
 

-       if ('\0' == buf[i]) {
-               if ( ! mdoc_pmsg(m, line, offs, MANDOCERR_NOBLANKLN))
-                       return(0);
+       if (SEC_NONE == mdoc->lastnamed) {
+               mdoc_pmsg(mdoc, line, offs, MANDOCERR_NOTEXT);
+               return(1);
+       }

 
 

-               /*
-                * Insert a `Pp' in the case of a blank line.  Technically,
-                * blank lines aren't allowed, but enough manuals assume this
-                * behaviour that we want to work around it.
-                */
-               if ( ! mdoc_elem_alloc(m, line, offs, MDOC_Pp, NULL))
-                       return(0);
+       assert(mdoc->last);
+       n = mdoc->last;

 
 

-               m->next = MDOC_NEXT_SIBLING;
-               return(1);
+       /*
+        * Divert directly to list processing if we're encountering a
+        * columnar MDOC_BLOCK with or without a prior MDOC_BLOCK entry
+        * (a MDOC_BODY means it's already open, in which case we should
+        * process within its context in the normal way).
+        */
+
+       if (MDOC_Bl == n->tok && MDOC_BODY == n->type &&
+           LIST_column == n->norm->Bl.type) {
+               /* `Bl' is open without any children. */
+               mdoc->flags |= MDOC_FREECOL;
+               return(mdoc_macro(mdoc, MDOC_It, line, offs, &offs, buf));

        }
 
        }
 

-       /* 
-        * Warn if the last un-escaped character is whitespace. Then
-        * strip away the remaining spaces (tabs stay!).   
+       if (MDOC_It == n->tok && MDOC_BLOCK == n->type &&
+           NULL != n->parent &&
+           MDOC_Bl == n->parent->tok &&
+           LIST_column == n->parent->norm->Bl.type) {
+               /* `Bl' has block-level `It' children. */
+               mdoc->flags |= MDOC_FREECOL;
+               return(mdoc_macro(mdoc, MDOC_It, line, offs, &offs, buf));
+       }
+
+       /*
+        * Search for the beginning of unescaped trailing whitespace (ws)
+        * and for the first character not to be output (end).

         */
 
         */
 

-       i = (int)strlen(buf);
-       assert(i);
+       /* FIXME: replace with strcspn(). */
+       ws = NULL;
+       for (c = end = buf + offs; *c; c++) {
+               switch (*c) {
+               case ' ':
+                       if (NULL == ws)
+                               ws = c;
+                       continue;
+               case '\t':
+                       /*
+                        * Always warn about trailing tabs,
+                        * even outside literal context,
+                        * where they should be put on the next line.
+                        */
+                       if (NULL == ws)
+                               ws = c;
+                       /*
+                        * Strip trailing tabs in literal context only;
+                        * outside, they affect the next line.
+                        */
+                       if (MDOC_LITERAL & mdoc->flags)
+                               continue;
+                       break;
+               case '\\':
+                       /* Skip the escaped character, too, if any. */
+                       if (c[1])
+                               c++;
+                       /* FALLTHROUGH */
+               default:
+                       ws = NULL;
+                       break;
+               }
+               end = c + 1;
+       }
+       *end = '\0';
+
+       if (ws)
+               mdoc_pmsg(mdoc, line, (int)(ws-buf), MANDOCERR_EOLNSPACE);

 
 

-       if (' ' == buf[i - 1] || '\t' == buf[i - 1]) {
-               if (i > 1 && '\\' != buf[i - 2])
-                       if ( ! mdoc_pmsg(m, line, i - 1, MANDOCERR_EOLNSPACE))
-                               return(0);
+       if ('\0' == buf[offs] && ! (MDOC_LITERAL & mdoc->flags)) {
+               mdoc_pmsg(mdoc, line, (int)(c-buf), MANDOCERR_NOBLANKLN);

 
 

-               for (--i; i && ' ' == buf[i]; i--)
-                       /* Spin back to non-space. */ ;
+               /*
+                * Insert a `sp' in the case of a blank line.  Technically,
+                * blank lines aren't allowed, but enough manuals assume this
+                * behaviour that we want to work around it.
+                */
+               if ( ! mdoc_elem_alloc(mdoc, line, offs, MDOC_sp, NULL))
+                       return(0);

 
 

-               /* Jump ahead of escaped whitespace. */
-               i += '\\' == buf[i] ? 2 : 1;
+               mdoc->next = MDOC_NEXT_SIBLING;

 
 

-               buf[i] = '\0';
+               return(mdoc_valid_post(mdoc));

        }
 
        }
 

-       /* Allocate the whole word. */
-
-       if ( ! mdoc_word_alloc(m, line, offs, buf + offs))
+       if ( ! mdoc_word_alloc(mdoc, line, offs, buf+offs))

                return(0);
 
                return(0);
 

+       if (MDOC_LITERAL & mdoc->flags)
+               return(1);
+

        /*
         * 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.
         */
 
        /*
         * 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))
-               m->last->flags |= MDOC_EOS;
-
-       return(1);
-}
+       assert(buf < end);

 
 

+       if (mandoc_eos(buf+offs, (size_t)(end-buf-offs)))
+               mdoc->last->flags |= MDOC_EOS;

 
 

-static int
-macrowarn(struct mdoc *m, int ln, const char *buf, int offs)
-{
-       int              rc;
-
-       rc = mdoc_vmsg(m, MANDOCERR_MACRO, ln, offs, 
-                       "unknown macro: %s%s", 
-                       buf, strlen(buf) > 3 ? "..." : "");
-
-       /* FIXME: logic should be in driver. */
-       return(MDOC_IGN_MACRO & m->pflags ? rc : 0);
+       return(1);

 }
 
 }
 

-

 /*
  * Parse a macro line, that is, a line beginning with the control
  * character.
  */
 /*
  * Parse a macro line, that is, a line beginning with the control
  * character.
  */

-int
-mdoc_pmacro(struct mdoc *m, int ln, char *buf, int offs)
+static int
+mdoc_pmacro(struct mdoc *mdoc, int ln, char *buf, int offs)

 {
 {

-       enum mdoct      tok;
-       int             i, j, sv;
-       char            mac[5];
-
-       /* Empty lines are ignored. */
+       enum mdoct        tok;
+       int               i, sv;
+       char              mac[5];
+       struct mdoc_node *n;

 
 

-       offs++;
+       /* Empty post-control lines are ignored. */

 
 

-       if ('\0' == buf[offs])
+       if ('"' == buf[offs]) {
+               mdoc_pmsg(mdoc, ln, offs, MANDOCERR_BADCOMMENT);
+               return(1);
+       } else if ('\0' == buf[offs])

                return(1);
 
                return(1);
 

-       i = offs;
+       sv = offs;
+
+       /*
+        * Copy the first word into a nil-terminated buffer.
+        * Stop copying when a tab, space, or eoln is encountered.
+        */
+
+       i = 0;
+       while (i < 4 && '\0' != buf[offs] && ' ' != buf[offs] &&
+           '\t' != buf[offs])
+               mac[i++] = buf[offs++];
+
+       mac[i] = '\0';

 
 

-       /* Accept whitespace after the initial control char. */
+       tok = (i > 1 && i < 4) ? mdoc_hash_find(mac) : MDOC_MAX;

 
 

-       if (' ' == buf[i]) {
-               i++;
-               while (buf[i] && ' ' == buf[i])
-                       i++;
-               if ('\0' == buf[i])
-                       return(1);
+       if (MDOC_MAX == tok) {
+               mandoc_vmsg(MANDOCERR_MACRO, mdoc->parse,
+                   ln, sv, "%s", buf + sv - 1);
+               return(1);

        }
 
        }
 

-       sv = i;
+       /* Disregard the first trailing tab, if applicable. */

 
 

-       /* Copy the first word into a nil-terminated buffer. */
+       if ('\t' == buf[offs])
+               offs++;

 
 

-       for (j = 0; j < 4; j++, i++) {
-               if ('\0' == (mac[j] = buf[i]))
-                       break;
-               else if (' ' == buf[i])
-                       break;
+       /* Jump to the next non-whitespace word. */

 
 

-               /* Check for invalid characters. */
+       while (buf[offs] && ' ' == buf[offs])
+               offs++;

 
 

-               if (isgraph((u_char)buf[i]))
-                       continue;
-               if ( ! mdoc_pmsg(m, ln, i, MANDOCERR_BADCHAR))
-                       return(0);
-               i--;
-       }
+       /*
+        * Trailing whitespace.  Note that tabs are allowed to be passed
+        * into the parser as "text", so we only warn about spaces here.
+        */

 
 

-       mac[j] = '\0';
+       if ('\0' == buf[offs] && ' ' == buf[offs - 1])
+               mdoc_pmsg(mdoc, ln, offs - 1, MANDOCERR_EOLNSPACE);

 
 

-       if (j == 4 || j < 2) {
-               if ( ! macrowarn(m, ln, mac, sv))
-                       goto err;
-               return(1);
-       } 
-       
-       if (MDOC_MAX == (tok = mdoc_hash_find(mac))) {
-               if ( ! macrowarn(m, ln, mac, sv))
+       /*
+        * If an initial macro or a list invocation, divert directly
+        * into macro processing.
+        */
+
+       if (NULL == mdoc->last || MDOC_It == tok || MDOC_El == tok) {
+               if ( ! mdoc_macro(mdoc, tok, ln, sv, &offs, buf))

                        goto err;
                return(1);
        }
 
                        goto err;
                return(1);
        }
 

-       /* The macro is sane.  Jump to the next word. */
-
-       while (buf[i] && ' ' == buf[i])
-               i++;
+       n = mdoc->last;
+       assert(mdoc->last);

 
 

-       /* 
-        * Trailing whitespace.  Note that tabs are allowed to be passed
-        * into the parser as "text", so we only warn about spaces here.
+       /*
+        * If the first macro of a `Bl -column', open an `It' block
+        * context around the parsed macro.

         */
 
         */
 

-       if ('\0' == buf[i] && ' ' == buf[i - 1])
-               if ( ! mdoc_pmsg(m, ln, i - 1, MANDOCERR_EOLNSPACE))
+       if (MDOC_Bl == n->tok && MDOC_BODY == n->type &&
+           LIST_column == n->norm->Bl.type) {
+               mdoc->flags |= MDOC_FREECOL;
+               if ( ! mdoc_macro(mdoc, MDOC_It, ln, sv, &sv, buf))

                        goto err;
                        goto err;

+               return(1);
+       }

 
 

-       /* 
-        * Begin recursive parse sequence.  Since we're at the start of
-        * the line, we don't need to do callable/parseable checks.
+       /*
+        * If we're following a block-level `It' within a `Bl -column'
+        * context (perhaps opened in the above block or in ptext()),
+        * then open an `It' block context around the parsed macro.

         */
         */

-       if ( ! mdoc_macro(m, tok, ln, sv, &i, buf)) 
+
+       if (MDOC_It == n->tok && MDOC_BLOCK == n->type &&
+           NULL != n->parent &&
+           MDOC_Bl == n->parent->tok &&
+           LIST_column == n->parent->norm->Bl.type) {
+               mdoc->flags |= MDOC_FREECOL;
+               if ( ! mdoc_macro(mdoc, MDOC_It, ln, sv, &sv, buf))
+                       goto err;
+               return(1);
+       }
+
+       /* Normal processing of a macro. */
+
+       if ( ! mdoc_macro(mdoc, tok, ln, sv, &offs, buf))

                goto err;
 
                goto err;
 

+       /* In quick mode (for mandocdb), abort after the NAME section. */
+
+       if (mdoc->quick && MDOC_Sh == tok &&
+           SEC_NAME != mdoc->last->sec)
+               return(2);
+

        return(1);
 
 err:   /* Error out. */
 
        return(1);
 
 err:   /* Error out. */
 

-       m->flags |= MDOC_HALT;
+       mdoc->flags |= MDOC_HALT;

        return(0);
 }
 
        return(0);
 }
 

+enum mdelim
+mdoc_isdelim(const char *p)
+{

 
 

+       if ('\0' == p[0])
+               return(DELIM_NONE);
+
+       if ('\0' == p[1])
+               switch (p[0]) {
+               case '(':
+                       /* FALLTHROUGH */
+               case '[':
+                       return(DELIM_OPEN);
+               case '|':
+                       return(DELIM_MIDDLE);
+               case '.':
+                       /* FALLTHROUGH */
+               case ',':
+                       /* FALLTHROUGH */
+               case ';':
+                       /* FALLTHROUGH */
+               case ':':
+                       /* FALLTHROUGH */
+               case '?':
+                       /* FALLTHROUGH */
+               case '!':
+                       /* FALLTHROUGH */
+               case ')':
+                       /* FALLTHROUGH */
+               case ']':
+                       return(DELIM_CLOSE);
+               default:
+                       return(DELIM_NONE);
+               }
+
+       if ('\\' != p[0])
+               return(DELIM_NONE);
+
+       if (0 == strcmp(p + 1, "."))
+               return(DELIM_CLOSE);
+       if (0 == strcmp(p + 1, "fR|\\fP"))
+               return(DELIM_MIDDLE);
+
+       return(DELIM_NONE);
+}
+
+void
+mdoc_deroff(char **dest, const struct mdoc_node *n)
+{
+       char    *cp;
+       size_t   sz;
+
+       if (MDOC_TEXT != n->type) {
+               for (n = n->child; n; n = n->next)
+                       mdoc_deroff(dest, n);
+               return;
+       }
+
+       /* Skip leading whitespace. */
+
+       for (cp = n->string; '\0' != *cp; cp++)
+               if (0 == isspace((unsigned char)*cp))
+                       break;
+
+       /* Skip trailing whitespace. */
+
+       for (sz = strlen(cp); sz; sz--)
+               if (0 == isspace((unsigned char)cp[sz-1]))
+                       break;
+
+       /* Skip empty strings. */
+
+       if (0 == sz)
+               return;
+
+       if (NULL == *dest) {
+               *dest = mandoc_strndup(cp, sz);
+               return;
+       }
+
+       mandoc_asprintf(&cp, "%s %*s", *dest, (int)sz, cp);
+       free(*dest);
+       *dest = cp;
+}