From a23197980e40d4d9414bcfaf59005a1dc2a89251 Mon Sep 17 00:00:00 2001 From: sreejith Date: Wed, 29 Mar 2017 01:15:02 -0400 Subject: Added vpp intial source code from master branch 17.01.1 Change-Id: I81bdace6f330825a1746a853766779dfb24765fd Signed-off-by: sreejith --- vpp/vlib/vlib/lex.h | 145 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 145 insertions(+) create mode 100644 vpp/vlib/vlib/lex.h (limited to 'vpp/vlib/vlib/lex.h') diff --git a/vpp/vlib/vlib/lex.h b/vpp/vlib/vlib/lex.h new file mode 100644 index 00000000..4ae58f46 --- /dev/null +++ b/vpp/vlib/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 +#include +#include +#include + +#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: + */ -- cgit 1.2.3-korg