Fix eval bugs 1516 and 1517.

1 files changed, 25 insertions, 0 deletions

diff --git a/expand.c b/expand.c
index 5c2c3e2..ac4ccda 100644
--- a/expand.c
+++ b/expand.c
@@ -545,3 +545,28 @@ allocated_variable_expand_for_file (char *line, struct file *file)
 
   return value;
 }
+
+/* Install a new variable_buffer context, returning the current one for
+   safe-keeping.  */
+
+void
+install_variable_buffer (char **bufp, unsigned int *lenp)
+{
+  *bufp = variable_buffer;
+  *lenp = variable_buffer_length;
+
+  variable_buffer = 0;
+  initialize_variable_output ();
+}
+
+/* Restore a previously-saved variable_buffer setting (free the current one).
+ */
+
+void
+restore_variable_buffer (char *buf, unsigned int len)
+{
+  free (variable_buffer);
+
+  variable_buffer = buf;
+  variable_buffer_length = len;
+}