libmicrohttpd2

HTTP server C library (MHD 2.x, alpha)
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mhd_tristate.h (2964B)

      1 /* SPDX-License-Identifier: LGPL-2.1-or-later OR (GPL-2.0-or-later WITH eCos-exception-2.0) */
      2 /*
      3   This file is part of GNU libmicrohttpd.
      4   Copyright (C) 2024 Evgeny Grin (Karlson2k)
      5 
      6   GNU libmicrohttpd is free software; you can redistribute it and/or
      7   modify it under the terms of the GNU Lesser General Public
      8   License as published by the Free Software Foundation; either
      9   version 2.1 of the License, or (at your option) any later version.
     10 
     11   GNU libmicrohttpd is distributed in the hope that it will be useful,
     12   but WITHOUT ANY WARRANTY; without even the implied warranty of
     13   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     14   Lesser General Public License for more details.
     15 
     16   Alternatively, you can redistribute GNU libmicrohttpd and/or
     17   modify it under the terms of the GNU General Public License as
     18   published by the Free Software Foundation; either version 2 of
     19   the License, or (at your option) any later version, together
     20   with the eCos exception, as follows:
     21 
     22     As a special exception, if other files instantiate templates or
     23     use macros or inline functions from this file, or you compile this
     24     file and link it with other works to produce a work based on this
     25     file, this file does not by itself cause the resulting work to be
     26     covered by the GNU General Public License. However the source code
     27     for this file must still be made available in accordance with
     28     section (3) of the GNU General Public License v2.
     29 
     30     This exception does not invalidate any other reasons why a work
     31     based on this file might be covered by the GNU General Public
     32     License.
     33 
     34   You should have received copies of the GNU Lesser General Public
     35   License and the GNU General Public License along with this library;
     36   if not, see <https://www.gnu.org/licenses/>.
     37 */
     38 
     39 /**
     40  * @file src/mhd2/mhd_tristate.h
     41  * @brief  The definition of the tristate type and helper macros
     42  * @author Karlson2k (Evgeny Grin)
     43  */
     44 
     45 #ifndef MHD_TRISTATE_H
     46 #define MHD_TRISTATE_H 1
     47 
     48 #include "mhd_sys_options.h"
     49 
     50 /**
     51  * Enum with three values / states
     52  */
     53 enum MHD_FIXED_ENUM_ mhd_Tristate
     54 {
     55   /**
     56    * Definitely no / negative / false
     57    */
     58   mhd_T_NO = 0
     59   ,
     60   /**
     61    * Definitely yes / positive / true
     62    */
     63   mhd_T_YES = 1
     64   ,
     65   /**
     66    * Undetermined / not known / maybe yes-maybe no
     67    */
     68   mhd_T_MAYBE = -1
     69 };
     70 
     71 /**
     72  * Check whether tristate value is mhd_T_YES
     73  */
     74 #define mhd_T_IS_YES(v) (mhd_T_NO < (v))
     75 
     76 /**
     77  * Check whether tristate value is mhd_T_NO
     78  */
     79 #define mhd_T_IS_NO(v) (mhd_T_NO == (v))
     80 
     81 /**
     82  * Check whether tristate value is mhd_T_MAYBE
     83  */
     84 #define mhd_T_IS_MAYBE(v) (mhd_T_NO > (v))
     85 
     86 /**
     87  * Check whether tristate value is NOT mhd_T_YES
     88  */
     89 #define mhd_T_IS_NOT_YES(v) (mhd_T_NO >= (v))
     90 
     91 /**
     92  * Check whether tristate value is NOT mhd_T_NO
     93  */
     94 #define mhd_T_IS_NOT_NO(v) (mhd_T_NO != (v))
     95 
     96 /**
     97  * Check whether tristate value is NOT mhd_T_MAYBE
     98  */
     99 #define mhd_T_IS_NOT_MAYBE(v) (mhd_T_NO <= (v))
    100 
    101 #endif /* ! MHD_TRISTATE_H */