vppinfra: add unformat_{single,double}_quoted_string function

Change-Id: I8ee90be1b772074c1130b98c71b3be48c973b2e2
Type: improvement
Signed-off-by: Damjan Marion <damarion@cisco.com>

2 files changed, 44 insertions, 0 deletions

diff --git a/src/vppinfra/format.h b/src/vppinfra/format.h
index cf5e1f6dcce..24511735a53 100644
--- a/src/vppinfra/format.h
+++ b/src/vppinfra/format.h
@@ -312,6 +312,10 @@ unformat_function_t unformat_memory_size;
 /* Unformat C string array, takes array length as 2nd argument */
 unformat_function_t unformat_c_string_array;
 
+/* Unformat sigle and double quoted string */
+unformat_function_t unformat_single_quoted_string;
+unformat_function_t unformat_double_quoted_string;
+
 /* Format base 10 e.g. 100, 100K, 100M, 100G */
 u8 *format_base10 (u8 *s, va_list *va);
 
diff --git a/src/vppinfra/unformat.c b/src/vppinfra/unformat.c
index cea5b677dec..fe1a46e4a12 100644
--- a/src/vppinfra/unformat.c
+++ b/src/vppinfra/unformat.c
@@ -1143,6 +1143,46 @@ unformat_c_string_array (unformat_input_t *input, va_list *va)
   return rv;
 }
 
+static uword
+__unformat_quoted_string (unformat_input_t *input, u8 **sp, char quote)
+{
+  u8 *s = 0;
+  uword c, p = 0;
+
+  while ((c = unformat_get_input (input)) != UNFORMAT_END_OF_INPUT)
+    if (!is_white_space (c))
+      break;
+
+  if (c != quote)
+    return 0;
+
+  while ((c = unformat_get_input (input)) != UNFORMAT_END_OF_INPUT)
+    {
+      if (c == quote && p != '\\')
+	{
+	  *sp = s;
+	  return 1;
+	}
+      vec_add1 (s, c);
+      p = c;
+    }
+  vec_free (s);
+
+  return 0;
+}
+
+__clib_export uword
+unformat_single_quoted_string (unformat_input_t *input, va_list *va)
+{
+  return __unformat_quoted_string (input, va_arg (*va, u8 **), '\'');
+}
+
+__clib_export uword
+unformat_double_quoted_string (unformat_input_t *input, va_list *va)
+{
+  return __unformat_quoted_string (input, va_arg (*va, u8 **), '"');
+}
+
 #endif /* CLIB_UNIX */