Rt-thread finsh Source Analysis: FINSH_ERROR.C

/* *  error number for finsh shell. * * copyright  (C)  2013, shanghai real-thread technology co., ltd * *  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 */#include   "Finsh_error.h" u_char global_errno;   //static global variable, error code//error type corresponding to the string static const char * finsh_error_string_table[] ={      "No error", "Invalid token", "Expect a type", "Unknown type", "Variable  exist "," Expect a operater "," Memory full "," Unknown operator "," Unknown node "," Expect a character "," Unexpect end "," Unknown token "," float not supported "," Unknown symbol "," Null node "};//error code initialization int finsh_error_init () {Global_errno = finsh_ error_ok;return 0;} Set error code Int finsh_error_set (u_char type) {global_errno = type;return 0;} Get error code U_char finsh_errno () {Return global_errno;} Error string returned by error code const char* finsh_error_string (u_char&nbsP;type) {Return finsh_error_string_table[type];} 

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Rt-thread finsh Source Analysis: FINSH_ERROR.C