If a predefined string is missing, emit a warning and make it an empty

string instead of passing it along to libmdoc/libman (where it'll be
printed verbatim, now).  This is what groff seems to do, too (of course
without a warning).

diff --git a/roff.c b/roff.c
index a9dbce22a58db061900e7d4a6c9778e45880463d..92a4a9b37231f08c46ce673476ab7a21dc5c8f17 100644 (file)
--- a/roff.c
+++ b/roff.c
@@ -1,4 +1,4 @@
-/*     $Id: roff.c,v 1.141 2011/05/24 21:18:06 kristaps Exp $ */
+/*     $Id: roff.c,v 1.142 2011/05/26 11:58:25 kristaps Exp $ */
 /*
  * Copyright (c) 2010, 2011 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010, 2011 Ingo Schwarze <schwarze@openbsd.org>
@@ -150,7 +150,7 @@ static      const char      *roff_getstrn(const struct roff *,
 static enum rofferr     roff_line_ignore(ROFF_ARGS);
 static enum rofferr     roff_nr(ROFF_ARGS);
 static int              roff_res(struct roff *, 
-                               char **, size_t *, int);
+                               char **, size_t *, int, int);
 static enum rofferr     roff_rm(ROFF_ARGS);
 static void             roff_setstr(struct roff *,
                                const char *, const char *, int);
@@ -387,7 +387,7 @@ roff_alloc(struct regset *regs, struct mparse *parse)
  * is processed. 
  */
 static int
-roff_res(struct roff *r, char **bufp, size_t *szp, int pos)
+roff_res(struct roff *r, char **bufp, size_t *szp, int ln, int pos)
 {
        const char      *stesc; /* start of an escape sequence ('\\') */
        const char      *stnam; /* start of the name, after "[(*" */
@@ -454,8 +454,9 @@ roff_res(struct roff *r, char **bufp, size_t *szp, int pos)
                res = roff_getstrn(r, stnam, (size_t)i);
 
                if (NULL == res) {
-                       cp -= maxl ? 1 : 0;
-                       continue;
+                       /* TODO: keep track of the correct position. */
+                       mandoc_msg(MANDOCERR_BADESCAPE, r->parse, ln, pos, NULL);
+                       res = "";
                }
 
                /* Replace the escape sequence by the string. */
@@ -491,7 +492,7 @@ roff_parseln(struct roff *r, int ln, char **bufp,
         * words to fill in.
         */
 
-       if (r->first_string && ! roff_res(r, bufp, szp, pos))
+       if (r->first_string && ! roff_res(r, bufp, szp, ln, pos))
                return(ROFF_REPARSE);
 
        ppos = pos;