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-rw-r--r--roff.c53
1 files changed, 53 insertions, 0 deletions
diff --git a/roff.c b/roff.c
index d5eb3f90..55172fad 100644
--- a/roff.c
+++ b/roff.c
@@ -1114,6 +1114,59 @@ roff_node_delete(struct roff_man *man, struct roff_node *n)
roff_node_free(n);
}
+int
+roff_node_transparent(struct roff_node *n)
+{
+ if (n == NULL)
+ return 0;
+ if (n->type == ROFFT_COMMENT || n->flags & NODE_NOPRT)
+ return 1;
+ switch (n->tok) {
+ case ROFF_ft:
+ case ROFF_ll:
+ case ROFF_mc:
+ case ROFF_po:
+ case ROFF_ta:
+ case MDOC_Db:
+ case MDOC_Es:
+ case MDOC_Sm:
+ case MDOC_Tg:
+ case MAN_DT:
+ case MAN_UC:
+ case MAN_PD:
+ case MAN_AT:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+struct roff_node *
+roff_node_child(struct roff_node *n)
+{
+ for (n = n->child; roff_node_transparent(n); n = n->next)
+ continue;
+ return n;
+}
+
+struct roff_node *
+roff_node_prev(struct roff_node *n)
+{
+ do {
+ n = n->prev;
+ } while (roff_node_transparent(n));
+ return n;
+}
+
+struct roff_node *
+roff_node_next(struct roff_node *n)
+{
+ do {
+ n = n->next;
+ } while (roff_node_transparent(n));
+ return n;
+}
+
void
deroff(char **dest, const struct roff_node *n)
{