1 files changed, 145 insertions, 0 deletions
diff --git a/src/vlib/lex.h b/src/vlib/lex.h
new file mode 100644
index 00000000000..4ae58f468c1
--- /dev/null
+++ b/src/vlib/lex.h
@@ -0,0 +1,145 @@
+/*
+ * Copyright (c) 2015 Cisco and/or its affiliates.
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+#ifndef included_vlib_lex_h
+#define included_vlib_lex_h
+
+#include <vppinfra/hash.h>
+#include <vppinfra/bitmap.h>
+#include <vppinfra/error.h>
+#include <vppinfra/pool.h>
+
+#define foreach_vlib_lex_global_token           \
+  _ (invalid)                                   \
+  _ (eof)                                       \
+  _ (word)                                      \
+  _ (number)                                    \
+  _ (lt)                                        \
+  _ (gt)                                        \
+  _ (dot)                                       \
+  _ (slash)                                     \
+  _ (qmark)                                     \
+  _ (equals)                                    \
+  _ (plus)                                      \
+  _ (minus)                                     \
+  _ (star)                                      \
+  _ (lpar)                                      \
+  _ (rpar)
+
+typedef enum
+{
+#define _(f) VLIB_LEX_##f,
+  foreach_vlib_lex_global_token
+#undef _
+} vlib_lex_global_token_t;
+
+typedef enum
+{
+  VLIB_LEX_IGNORE,
+  VLIB_LEX_ADD_TO_TOKEN,
+  VLIB_LEX_RETURN,
+  VLIB_LEX_RETURN_AND_RESCAN,
+  VLIB_LEX_KEYWORD_CHECK,
+  VLIB_LEX_START_NUMBER,
+  VLIB_LEX_ADD_TO_NUMBER,
+} vlib_lex_action_t;
+
+typedef struct
+{
+  u16 action;
+  u16 next_table_index;
+  u16 token;
+} vlib_lex_table_entry_t;
+
+typedef struct
+{
+  char *name;
+  vlib_lex_table_entry_t entries[128];
+} vlib_lex_table_t;
+
+typedef struct
+{
+  u32 token;
+
+  union
+  {
+    uword as_uword;
+    void *as_pointer;
+    char *as_string;
+  } value;
+} vlib_lex_token_t;
+
+typedef struct
+{
+  vlib_lex_table_t *lex_tables;
+  uword *lex_tables_by_name;
+
+  /* Vector of token strings. */
+  char **lex_token_names;
+
+  /* Hash mapping c string name to token index. */
+  uword *lex_tokens_by_name;
+
+  /* Hash mapping c string keyword name to token index. */
+  uword *lex_keywords;
+
+  vlib_lex_token_t *pushback_vector;
+
+  i32 pushback_sp;
+
+  u32 current_table_index;
+
+  uword current_token_value;
+
+  uword current_number_base;
+
+  /* Input string we are lex-ing. */
+  u8 *input_vector;
+
+  /* Current index into input vector. */
+  u32 current_index;
+
+  /* Re-used vector for forming token strings and hashing them. */
+  u8 *token_buffer;
+} vlib_lex_main_t;
+
+vlib_lex_main_t vlib_lex_main;
+
+always_inline void
+vlib_lex_cleanup_token (vlib_lex_token_t * t)
+{
+  if (t->token == VLIB_LEX_word)
+    {
+      u8 *tv = t->value.as_pointer;
+      vec_free (tv);
+    }
+}
+
+u16 vlib_lex_add_table (char *name);
+void vlib_lex_get_token (vlib_lex_main_t * lm, vlib_lex_token_t * result);
+u16 vlib_lex_add_token (vlib_lex_main_t * lm, char *token_name);
+void vlib_lex_set_action_range (u32 table_index, u8 lo, u8 hi, u16 action,
+				u16 token, u32 next_table_index);
+void vlib_lex_reset (vlib_lex_main_t * lm, u8 * input_vector);
+format_function_t format_vlib_lex_token;
+
+#endif /* included_vlib_lex_h */
+
+/*
+ * fd.io coding-style-patch-verification: ON
+ *
+ * Local Variables:
+ * eval: (c-set-style "gnu")
+ * End:
+ */