Do not read past the end of the buffer if an "f" layout font modifier

[mandoc.git] / mdoc_macro.c

diff --git a/mdoc_macro.c b/mdoc_macro.c
index c6b0f3521295983f39e20e566aa925bf30645e1c..f04acb96e73bbbb43285a8ad3ad20b6590c30c8b 100644 (file)
--- a/mdoc_macro.c
+++ b/mdoc_macro.c
@@ -1,4 +1,4 @@
-/*     $Id: mdoc_macro.c,v 1.174 2015/02/04 22:30:10 schwarze Exp $ */
+/*     $Id: mdoc_macro.c,v 1.180 2015/02/07 16:42:33 schwarze Exp $ */
 /*
  * Copyright (c) 2008-2012 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010, 2012-2015 Ingo Schwarze <schwarze@openbsd.org>
@@ -262,9 +262,6 @@ rew_last(struct mdoc *mdoc, const struct mdoc_node *to)
        assert(to);
        mdoc->next = MDOC_NEXT_SIBLING;
        while (mdoc->last != to) {
-               if ( ! (mdoc->last->flags & MDOC_VALID))
-                       mdoc->last->lastline = to->lastline -
-                           (mdoc->flags & MDOC_NEWLINE ? 1 : 0);
                /*
                 * Save the parent here, because we may delete the
                 * mdoc->last node in the post-validation phase and reset
@@ -578,10 +575,8 @@ blk_exp_close(MACRO_PROT_ARGS)
                /* Remember the start of our own body. */
 
                if (n->type == MDOC_BODY && atok == n->tok) {
-                       if (n->end == ENDBODY_NOT) {
+                       if (n->end == ENDBODY_NOT)
                                body = n;
-                               n->lastline = line;
-                       }
                        continue;
                }
 
@@ -594,7 +589,6 @@ blk_exp_close(MACRO_PROT_ARGS)
                }
 
                if (atok == n->tok) {
-                       n->lastline = line;
                        assert(body);
 
                        /*
@@ -778,7 +772,7 @@ in_line(MACRO_PROT_ARGS)
                 */
 
                if (ac == ARGS_PUNCT) {
-                       if (cnt == 0 && nc == 0)
+                       if (cnt == 0 && (nc == 0 || tok == MDOC_An))
                                mdoc->flags |= MDOC_NODELIMC;
                        break;
                }
@@ -910,6 +904,12 @@ blk_full(MACRO_PROT_ARGS)
 
        nl = MDOC_NEWLINE & mdoc->flags;
 
+       if (buf[*pos] == '\0' && (tok == MDOC_Sh || tok == MDOC_Ss)) {
+               mandoc_msg(MANDOCERR_MACRO_EMPTY, mdoc->parse,
+                   line, ppos, mdoc_macronames[tok]);
+               return;
+       }
+
        if ( ! (mdoc_macros[tok].flags & MDOC_EXPLICIT)) {
 
                /* Here, tok is one of Sh Ss Nm Nd It. */
@@ -941,6 +941,7 @@ blk_full(MACRO_PROT_ARGS)
                                            mdoc_macronames[tok],
                                            mdoc_macronames[n->tok]);
                                        rew_pending(mdoc, n);
+                                       n = mdoc->last;
                                        continue;
                                case MDOC_It:
                                        /* Delay in case it's astray. */
@@ -1373,6 +1374,11 @@ in_line_argn(MACRO_PROT_ARGS)
        }
 
        if (j == 0) {
+               if (tok == MDOC_In || tok == MDOC_St || tok == MDOC_Xr) {
+                       mandoc_msg(MANDOCERR_MACRO_EMPTY, mdoc->parse,
+                           line, ppos, mdoc_macronames[tok]);
+                       return;
+               }
                mdoc_elem_alloc(mdoc, line, ppos, tok, arg);
                if (ac == ARGS_PUNCT && tok == MDOC_Pf)
                        append_delims(mdoc, line, pos, buf);
@@ -1398,6 +1404,13 @@ in_line_eoln(MACRO_PROT_ARGS)
                        rew_last(mdoc, mdoc->last->parent);
        }
 
+       if (buf[*pos] == '\0' &&
+           (tok == MDOC_Fd || mdoc_macronames[tok][0] == '%')) {
+               mandoc_msg(MANDOCERR_MACRO_EMPTY, mdoc->parse,
+                   line, ppos, mdoc_macronames[tok]);
+               return;
+       }
+
        mdoc_argv(mdoc, line, tok, &arg, pos, buf);
        mdoc_elem_alloc(mdoc, line, ppos, tok, arg);
        if (parse_rest(mdoc, tok, line, pos, buf))