1 /* Quintuple Agent utilities 2 * Copyright (C) 1999 Robert Bihlmeyer <robbe@orcus.priv.at> 3 * Copyright (C) 2003 g10 Code GmbH 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of the GNU General Public License as published by 7 * the Free Software Foundation; either version 2 of the License, or 8 * (at your option) any later version. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, see <https://www.gnu.org/licenses/>. 17 * SPDX-License-Identifier: GPL-2.0+ 18 */ 19 20 #ifndef _UTIL_H 21 #define _UTIL_H 22 23 #include <sys/types.h> 24 25 #ifndef HAVE_BYTE_TYPEDEF 26 # undef byte 27 # ifdef __riscos__ 28 /* Norcroft treats char == unsigned char but char* != unsigned char* */ 29 typedef char byte; 30 # else 31 typedef unsigned char byte; 32 # endif 33 # define HAVE_BYTE_TYPEDEF 34 #endif 35 36 #ifndef HAVE_ULONG_TYPEDEF 37 # undef ulong 38 typedef unsigned long ulong; 39 # define HAVE_ULONG_TYPEDEF 40 #endif 41 42 43 ssize_t xwrite(int, const void *, size_t); /* write until finished */ 44 int debugmsg(const char *, ...); /* output a debug message if debugging==on */ 45 void drop_privs(void); /* finally drop privileges */ 46 47 48 /* To avoid that a compiler optimizes certain memset calls away, these 49 macros may be used instead. */ 50 #define wipememory2(_ptr,_set,_len) do { \ 51 volatile char *_vptr=(volatile char *)(_ptr); \ 52 size_t _vlen=(_len); \ 53 while(_vlen) { *_vptr=(_set); _vptr++; _vlen--; } \ 54 } while(0) 55 #define wipememory(_ptr,_len) wipememory2(_ptr,0,_len) 56 #define wipe(_ptr,_len) wipememory2(_ptr,0,_len) 57 58 59 60 61 #define xtoi_1(p) (*(p) <= '9'? (*(p)- '0'): \ 62 *(p) <= 'F'? (*(p)-'A'+10):(*(p)-'a'+10)) 63 #define xtoi_2(p) ((xtoi_1(p) * 16) + xtoi_1((p)+1)) 64 65 66 #endif 67