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+/*
+ * 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:
+ */