/* 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, write to the Free Software *  Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */ #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