RT-Thread finsh源碼分析: finsh_token.h

/*
 *  token lex for finsh shell.
 *
 * COPYRIGHT (C) 2006 - 2013, RT-Thread Development Team
 *
 *  This file is part of RT-Thread (http://www.rt-thread.org)
 *  Maintainer: bernard.xiong <bernard.xiong at gmail.com>
 *
 *  All rights reserved.
 *
 *  This program is free software; you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation; either version 2 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License along
 *  with this program; if not, write to the Free Software Foundation, Inc.,
 *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Change Logs:
 * Date           Author       Notes
 * 2010-03-22     Bernard      first version
 */
#ifndef __FINSH_TOKEN_H__
#define __FINSH_TOKEN_H__

#include <finsh.h>

//token類型定義
enum finsh_token_type
{
    finsh_token_type_left_paren = 1,    /* (        */
    finsh_token_type_right_paren ,      /* )        */
    finsh_token_type_comma ,            /* ,        */
    finsh_token_type_semicolon ,        /* ;        */
    finsh_token_type_mul ,              /* *        */
    finsh_token_type_add ,              /* +        */
    finsh_token_type_inc ,              /* ++       */
    finsh_token_type_sub ,              /* -        */
    finsh_token_type_dec ,              /* --       */
    finsh_token_type_div ,              /* /        */
    finsh_token_type_mod ,              /* %        */
    finsh_token_type_assign ,           /* =        */
    finsh_token_type_and,               /* &        */
    finsh_token_type_or,                /* |        */
    finsh_token_type_xor,               /* ^        */
    finsh_token_type_bitwise,           /* ~       */
    finsh_token_type_shl,               /* <<       */
    finsh_token_type_shr,               /* >>       */
    finsh_token_type_comments,          /* //       */
    /*-- data type --*/
    finsh_token_type_void,              /* void     */
    finsh_token_type_char,              /* char     */
    finsh_token_type_short,             /* short    */
    finsh_token_type_int,               /* int      */
    finsh_token_type_long,              /* long     */
    finsh_token_type_unsigned,          /* unsigned */
    /* data value type */
    finsh_token_type_value_char,        /* v:char   */
    finsh_token_type_value_int,         /* v:int    */
    finsh_token_type_value_long,        /* v:long   */
    finsh_token_type_value_string,      /* v:string */
    finsh_token_type_value_null,        /* NULL     */
    /*-- others --*/
    finsh_token_type_identifier,        /* ID       */
    finsh_token_type_bad,               /* bad token */
    finsh_token_type_eof
};

//獲取當前操作位移
#define finsh_token_position(self) (self)->position
#define finsh_token_replay(self) (self)->replay = 1

void finsh_token_init(struct finsh_token* self, u_char* script);

enum finsh_token_type finsh_token_token(struct finsh_token* self);
void finsh_token_get_token(struct finsh_token* self, u_char* token);

#endif