vppinfra: add unformat_init_path

More conveninet way to unformat file by providing filesystem path.
Takes format string for easier constuction of path...

Type: improvement
Change-Id: I433204fa20dc98e2b11c53914883d047a7fc62c6
Signed-off-by: Damjan Marion <damarion@cisco.com>

1 files changed, 10 insertions, 2 deletions

diff --git a/src/vppinfra/format.h b/src/vppinfra/format.h
index 7254031a0ea..cf5e1f6dcce 100644
--- a/src/vppinfra/format.h
+++ b/src/vppinfra/format.h
@@ -133,8 +133,11 @@ typedef struct _unformat_input_t
      (and argument). */
     uword (*fill_buffer) (struct _unformat_input_t * i);
 
-  /* Return values for fill buffer function which indicate whether not
-     input has been exhausted. */
+    /* User's function to be called on input_free */
+    void (*free) (struct _unformat_input_t *i);
+
+    /* Return values for fill buffer function which indicate whether not
+       input has been exhausted. */
 #define UNFORMAT_END_OF_INPUT (~0)
 #define UNFORMAT_MORE_INPUT   0
 
@@ -155,6 +158,8 @@ unformat_init (unformat_input_t * i,
 always_inline void
 unformat_free (unformat_input_t * i)
 {
+  if (i->free)
+    i->free (i);
   vec_free (i->buffer);
   vec_free (i->buffer_marks);
   clib_memset (i, 0, sizeof (i[0]));
@@ -336,6 +341,9 @@ u8 *format_uword_bitmap (u8 *s, va_list *va);
 /* Setup input from Unix file. */
 void unformat_init_clib_file (unformat_input_t * input, int file_descriptor);
 
+/* Setup input from flesystem path. */
+uword unformat_init_file (unformat_input_t *input, char *fmt, ...);
+
 /* Take input from Unix environment variable; returns
    1 if variable exists zero otherwise. */
 uword unformat_init_unix_env (unformat_input_t * input, char *var);