71612d6193
- Global variables declared in header files without the use of the 'extern' keword will result in multiple instances of the variable to be created by the compiler -- one for each different source file in which the the header file is included. This results in wasted memory allocated in the BSS segments as well as potentially introducing bugs in the application. Change-Id: I6ef1790b60a0bd9dd3994f8510723decf258b0cc Signed-off-by: Dave Wallace <dwallacelf@gmail.com>
146 lines
3.5 KiB
C
146 lines
3.5 KiB
C
/*
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* Copyright (c) 2015 Cisco and/or its affiliates.
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at:
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef included_vlib_lex_h
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#define included_vlib_lex_h
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#include <vppinfra/hash.h>
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#include <vppinfra/bitmap.h>
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#include <vppinfra/error.h>
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#include <vppinfra/pool.h>
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#define foreach_vlib_lex_global_token \
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_ (invalid) \
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_ (eof) \
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_ (word) \
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_ (number) \
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_ (lt) \
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_ (gt) \
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_ (dot) \
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_ (slash) \
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_ (qmark) \
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_ (equals) \
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_ (plus) \
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_ (minus) \
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_ (star) \
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_ (lpar) \
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_ (rpar)
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typedef enum
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{
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#define _(f) VLIB_LEX_##f,
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foreach_vlib_lex_global_token
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#undef _
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} vlib_lex_global_token_t;
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typedef enum
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{
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VLIB_LEX_IGNORE,
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VLIB_LEX_ADD_TO_TOKEN,
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VLIB_LEX_RETURN,
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VLIB_LEX_RETURN_AND_RESCAN,
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VLIB_LEX_KEYWORD_CHECK,
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VLIB_LEX_START_NUMBER,
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VLIB_LEX_ADD_TO_NUMBER,
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} vlib_lex_action_t;
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typedef struct
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{
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u16 action;
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u16 next_table_index;
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u16 token;
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} vlib_lex_table_entry_t;
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typedef struct
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{
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char *name;
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vlib_lex_table_entry_t entries[128];
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} vlib_lex_table_t;
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typedef struct
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{
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u32 token;
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union
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{
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uword as_uword;
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void *as_pointer;
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char *as_string;
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} value;
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} vlib_lex_token_t;
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typedef struct
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{
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vlib_lex_table_t *lex_tables;
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uword *lex_tables_by_name;
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/* Vector of token strings. */
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char **lex_token_names;
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/* Hash mapping c string name to token index. */
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uword *lex_tokens_by_name;
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/* Hash mapping c string keyword name to token index. */
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uword *lex_keywords;
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vlib_lex_token_t *pushback_vector;
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i32 pushback_sp;
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u32 current_table_index;
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uword current_token_value;
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uword current_number_base;
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/* Input string we are lex-ing. */
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u8 *input_vector;
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/* Current index into input vector. */
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u32 current_index;
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/* Re-used vector for forming token strings and hashing them. */
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u8 *token_buffer;
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} vlib_lex_main_t;
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extern vlib_lex_main_t vlib_lex_main;
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always_inline void
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vlib_lex_cleanup_token (vlib_lex_token_t * t)
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{
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if (t->token == VLIB_LEX_word)
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{
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u8 *tv = t->value.as_pointer;
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vec_free (tv);
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}
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}
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u16 vlib_lex_add_table (char *name);
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void vlib_lex_get_token (vlib_lex_main_t * lm, vlib_lex_token_t * result);
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u16 vlib_lex_add_token (vlib_lex_main_t * lm, char *token_name);
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void vlib_lex_set_action_range (u32 table_index, u8 lo, u8 hi, u16 action,
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u16 token, u32 next_table_index);
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void vlib_lex_reset (vlib_lex_main_t * lm, u8 * input_vector);
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format_function_t format_vlib_lex_token;
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#endif /* included_vlib_lex_h */
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/*
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* fd.io coding-style-patch-verification: ON
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*
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* Local Variables:
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* eval: (c-set-style "gnu")
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* End:
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*/
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