107 lines
3.5 KiB
C
107 lines
3.5 KiB
C
/**
|
|
* @file enum.h
|
|
*
|
|
* @brief enum value to string conversion functions.
|
|
*
|
|
*/
|
|
|
|
/*
|
|
* Copyright (C) 2006 Martin Willi
|
|
* Hochschule fuer Technik Rapperswil
|
|
*
|
|
* 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. See <http://www.fsf.org/copyleft/gpl.txt>.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#ifndef ENUM_H_
|
|
#define ENUM_H_
|
|
|
|
typedef struct enum_name_t enum_name_t;
|
|
|
|
/**
|
|
* @brief Struct to store names for enums.
|
|
*
|
|
* To print the string representation of enumeration values, the strings
|
|
* are stored in these structures. Every enum_name contains a range
|
|
* of strings, multiple ranges are linked together.
|
|
* Use the convenience macros to define these linked ranges.
|
|
*
|
|
* For a single range, use:
|
|
* ENUM(name, first, last, string1, string2, ...)
|
|
*
|
|
* For multiple linked ranges, use:
|
|
* ENUM_BEGIN(name, first, last, string1, string2, ...)
|
|
* ENUM_NEXT(name, first, last, last_from_previous, string3, ...)
|
|
* ENUM_NEXT(name, first, last, last_from_previous, string4, ...)
|
|
* ENUM_END(name, last_from_previous)
|
|
*
|
|
* The ENUM and the ENUM_END define a enum_name_t pointer with the name supplied
|
|
* in "name".
|
|
*
|
|
* Resolving of enum names is done using a printf hook. A printf fromat
|
|
* character %N is replaced by the enum string. Printf needs two arguments to
|
|
* resolve a %N, the enum_name_t* (the defined name in ENUM_BEGIN) followed
|
|
* by the numerical enum value.
|
|
*/
|
|
struct enum_name_t {
|
|
/** value of the first enum string */
|
|
int first;
|
|
/** value of the last enum string */
|
|
int last;
|
|
/** next enum_name_t in list */
|
|
enum_name_t *next;
|
|
/** array of strings containing names from first to last */
|
|
char *names[];
|
|
};
|
|
|
|
/**
|
|
* @brief Begin a new enum_name list.
|
|
*
|
|
* @param name name of the enum_name list
|
|
* @param first enum value of the first enum string
|
|
* @param last enum value of the last enum string
|
|
* @param ... a list of strings
|
|
*/
|
|
#define ENUM_BEGIN(name, first, last, ...) static enum_name_t name##last = {first, last, NULL, { __VA_ARGS__ }}
|
|
|
|
/**
|
|
* @brief Continue a enum name list startetd with ENUM_BEGIN.
|
|
*
|
|
* @param name name of the enum_name list
|
|
* @param first enum value of the first enum string
|
|
* @param last enum value of the last enum string
|
|
* @param prev enum value of the "last" defined in ENUM_BEGIN/previous ENUM_NEXT
|
|
* @param ... a list of strings
|
|
*/
|
|
#define ENUM_NEXT(name, first, last, prev, ...) static enum_name_t name##last = {first, last, &name##prev, { __VA_ARGS__ }}
|
|
|
|
/**
|
|
* @brief Complete enum name list started with ENUM_BEGIN.
|
|
*
|
|
* @param name name of the enum_name list
|
|
* @param prev enum value of the "last" defined in ENUM_BEGIN/previous ENUM_NEXT
|
|
*/
|
|
#define ENUM_END(name, prev) enum_name_t *name = &name##prev;
|
|
|
|
/**
|
|
* @brief Define a enum name with only one range.
|
|
*
|
|
* This is a convenience macro to use when a enum_name list contains only
|
|
* one range, and is equal as defining ENUM_BEGIN followed by ENUM_END.
|
|
*
|
|
* @param name name of the enum_name list
|
|
* @param first enum value of the first enum string
|
|
* @param last enum value of the last enum string
|
|
* @param ... a list of strings
|
|
*/
|
|
#define ENUM(name, first, last, ...) ENUM_BEGIN(name, first, last, __VA_ARGS__); ENUM_END(name, last)
|
|
|
|
#endif /* ENUM_H_ */
|