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/* Quintuple Agent utilities
* Copyright (C) 1999 Robert Bihlmeyer <robbe@orcus.priv.at>
* Copyright (C) 2003 g10 Code GmbH
*
* 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, see <https://www.gnu.org/licenses/>.
* SPDX-License-Identifier: GPL-2.0+
*/
#ifndef _UTIL_H
#define _UTIL_H
#include <sys/types.h>
#ifndef HAVE_BYTE_TYPEDEF
# undef byte
# ifdef __riscos__
/* Norcroft treats char == unsigned char but char* != unsigned char* */
typedef char byte;
# else
typedef unsigned char byte;
# endif
# define HAVE_BYTE_TYPEDEF
#endif
#ifndef HAVE_ULONG_TYPEDEF
# undef ulong
typedef unsigned long ulong;
# define HAVE_ULONG_TYPEDEF
#endif
ssize_t xwrite(int, const void *, size_t); /* write until finished */
int debugmsg(const char *, ...); /* output a debug message if debugging==on */
void drop_privs(void); /* finally drop privileges */
/* To avoid that a compiler optimizes certain memset calls away, these
macros may be used instead. */
#define wipememory2(_ptr,_set,_len) do { \
volatile char *_vptr=(volatile char *)(_ptr); \
size_t _vlen=(_len); \
while(_vlen) { *_vptr=(_set); _vptr++; _vlen--; } \
} while(0)
#define wipememory(_ptr,_len) wipememory2(_ptr,0,_len)
#define wipe(_ptr,_len) wipememory2(_ptr,0,_len)
#define xtoi_1(p) (*(p) <= '9'? (*(p)- '0'): \
*(p) <= 'F'? (*(p)-'A'+10):(*(p)-'a'+10))
#define xtoi_2(p) ((xtoi_1(p) * 16) + xtoi_1((p)+1))
#endif
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