Implement the roff(7) .rr (remove register) request.

[mandoc.git] / roff.c

diff --git a/roff.c b/roff.c
index 7c46e9a593a96f9613227097720500374f585a3a..1316bfa9d2569997100c8d17cdb66dc029060f35 100644 (file)
--- a/roff.c
+++ b/roff.c
@@ -1,4 +1,4 @@
-/*     $Id: roff.c,v 1.200 2014/03/20 02:57:28 schwarze Exp $ */
+/*     $Id: roff.c,v 1.203 2014/04/05 20:34:57 schwarze Exp $ */
 /*
  * Copyright (c) 2010, 2011, 2012 Kristaps Dzonsons <kristaps@bsd.lv>
  * Copyright (c) 2010-2014 Ingo Schwarze <schwarze@openbsd.org>
@@ -26,6 +26,7 @@
 #include <string.h>
 
 #include "mandoc.h"
+#include "mandoc_aux.h"
 #include "libroff.h"
 #include "libmandoc.h"
 
@@ -61,6 +62,7 @@ enum  rofft {
        ROFF_ns,
        ROFF_ps,
        ROFF_rm,
+       ROFF_rr,
        ROFF_so,
        ROFF_ta,
        ROFF_tr,
@@ -201,6 +203,7 @@ static      enum rofferr     roff_parsetext(char **, size_t *, int, int *);
 static enum rofferr     roff_res(struct roff *, 
                                char **, size_t *, int, int);
 static enum rofferr     roff_rm(ROFF_ARGS);
+static enum rofferr     roff_rr(ROFF_ARGS);
 static void             roff_setstr(struct roff *,
                                const char *, const char *, int);
 static void             roff_setstrn(struct roffkv **, const char *, 
@@ -250,6 +253,7 @@ static      struct roffmac   roffs[ROFF_MAX] = {
        { "ns", roff_line_ignore, NULL, NULL, 0, NULL },
        { "ps", roff_line_ignore, NULL, NULL, 0, NULL },
        { "rm", roff_rm, NULL, NULL, 0, NULL },
+       { "rr", roff_rr, NULL, NULL, 0, NULL },
        { "so", roff_so, NULL, NULL, 0, NULL },
        { "ta", roff_line_ignore, NULL, NULL, 0, NULL },
        { "tr", roff_tr, NULL, NULL, 0, NULL },
@@ -655,11 +659,7 @@ roff_parsetext(char **bufp, size_t *szp, int pos, int *offs)
 
        /* Spring the input line trap. */
        if (1 == roffit_lines) {
-               isz = asprintf(&p, "%s\n.%s", *bufp, roffit_macro);
-               if (-1 == isz) {
-                       perror(NULL);
-                       exit((int)MANDOCLEVEL_SYSERR);
-               }
+               isz = mandoc_asprintf(&p, "%s\n.%s", *bufp, roffit_macro);
                free(*bufp);
                *bufp = p;
                *szp = isz + 1;
@@ -1505,6 +1505,31 @@ roff_nr(ROFF_ARGS)
        return(ROFF_IGN);
 }
 
+static enum rofferr
+roff_rr(ROFF_ARGS)
+{
+       struct roffreg  *reg, **prev;
+       const char      *name;
+       char            *cp;
+
+       cp = *bufp + pos;
+       name = roff_getname(r, &cp, ln, pos);
+
+       prev = &r->regtab;
+       while (1) {
+               reg = *prev;
+               if (NULL == reg || !strcmp(name, reg->key.p))
+                       break;
+               prev = &reg->next;
+       }
+       if (NULL != reg) {
+               *prev = reg->next;
+               free(reg->key.p);
+               free(reg);
+       }
+       return(ROFF_IGN);
+}
+
 /* ARGSUSED */
 static enum rofferr
 roff_rm(ROFF_ARGS)