initial commit

pinentry-dmenu/pinentry/util.h

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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, 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