/usr/include/gwenhywfar4/gwenhywfar/misc.h is in libgwenhywfar-core-dev 4.15.3-5+b1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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begin : Sat Jun 28 2003
copyright : (C) 2003-2010 by Martin Preuss
email : martin@libchipcard.de
***************************************************************************
* *
* This library is free software; you can redistribute it and/or *
* modify it under the terms of the GNU Lesser General Public *
* License as published by the Free Software Foundation; either *
* version 2.1 of the License, or (at your option) any later version. *
* *
* This library 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 *
* Lesser General Public License for more details. *
* *
* You should have received a copy of the GNU Lesser General Public *
* License along with this library; if not, write to the Free Software *
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, *
* MA 02111-1307 USA *
* *
***************************************************************************/
/** @file src/base/misc.h
*
* @short This file contains some macros concerning lists and inheritance.
*
* <p>
* FIRST: Yes, I DO know, macros are very, very bad.
* When writing these macros I spent much time debugging them, because the
* compiler is not much of a help here.
* The validity of a macro is only checked upon invocation,
* so if you never use a macro it will never be checked.
* </p>
* <p>
* However, these macros do work just fine and they make some tasks
* much easier to handle.
* </p>
* <p>
* The reason for using macros is the lack of templates in C.
* When writing Gwenhywfar I often faced the fact that some functions always
* appear with many structs defined. The only difference is the name of those
* functions and the type of the arguments.
* </p>
* <p>
* The best example is the handling of lists of structs.
* In most listable structs there was a variable called @b next which pointed
* to the next object in the list. There were also functions like TYPE_next(),
* TYPE_add(), TYPE_del() etc for list handling. Whenever I improved the list
* mechanism I had to change ALL code files in order to improve them all.
* </p>
* <p>
* These macros are now used to facilitate improvements in list or inheritance
* handling code in C.
* </p>
* <p>
* @b NOTE: Please do not change these macros unless you know exactly what you
* are doing!
* Bugs in the macros will most probably lead to nearly undebuggable results
* in code files using them.<br>
* You have been warned ;-)
* </p>
*
*/
#ifndef GWENHYWFAR_MISC_H
#define GWENHYWFAR_MISC_H
#include <gwenhywfar/gwenhywfarapi.h>
#include <gwenhywfar/types.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#ifdef __cplusplus
extern "C" {
#endif
#define GWEN_LIST_ADD(typ, sr, head) {\
typ *curr; \
\
assert(sr); \
\
curr=*head; \
if (!curr) { \
*head=sr; \
} \
else { \
while(curr->next) { \
curr=curr->next; \
} \
curr->next=sr; \
}\
}
#define GWEN_LIST_INSERT(typ, sr, head) {\
typ *curr; \
\
assert(sr); \
\
curr=*head; \
if (!curr) { \
*head=sr; \
} \
else { \
sr->next=curr;\
*head=sr;\
}\
}
#define GWEN_LIST_DEL(typ, sr, head) {\
typ *curr; \
\
assert(sr); \
curr=*head; \
if (curr) { \
if (curr==sr) { \
*head=curr->next; \
} \
else { \
while(curr->next!=sr) { \
curr=curr->next; \
} \
if (curr) \
curr->next=sr->next; \
} \
} \
sr->next=0;\
}
/*@}*/ /* defgroup */
#ifdef __cplusplus
}
#endif
#include <gwenhywfar/memory.h>
#include <gwenhywfar/list1.h>
#endif
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