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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;
extern 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:
*/
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