+static int charhex2bin(char c) {
+ if(isdigit(c))
+ return c - '0';
+ else
+ return toupper(c) - 'A' + 10;
+}
+
+bool hex2bin(char *src, char *dst, int length) {
+ for(int i = 0; i < length; i++) {
+ if(!isxdigit(src[i * 2]) || !isxdigit(src[i * 2 + 1]))
+ return false;
+ dst[i] = charhex2bin(src[i * 2]) * 16 + charhex2bin(src[i * 2 + 1]);
+ }
+ return true;
+}
+
+void bin2hex(char *src, char *dst, int length) {
+ int i;
+ for(i = length - 1; i >= 0; i--) {
+ dst[i * 2 + 1] = hexadecimals[(unsigned char) src[i] & 15];
+ dst[i * 2] = hexadecimals[(unsigned char) src[i] >> 4];
+ }
+}
+
+#if defined(HAVE_MINGW) || defined(HAVE_CYGWIN)
+#ifdef HAVE_CYGWIN
+#include <w32api/windows.h>
+#endif
+
+const char *winerror(int err) {
+ static char buf[1024], *ptr;
+
+ ptr = buf + sprintf(buf, "(%d) ", err);
+
+ if (!FormatMessage(FORMAT_MESSAGE_FROM_SYSTEM | FORMAT_MESSAGE_IGNORE_INSERTS,
+ NULL, err, MAKELANGID(LANG_NEUTRAL, SUBLANG_NEUTRAL), ptr, sizeof(buf) - (ptr - buf), NULL)) {
+ strcpy(ptr, "(unable to format errormessage)");
+ };
+
+ if((ptr = strchr(buf, '\r')))
+ *ptr = '\0';
+
+ return buf;
+}
+#endif
+
+unsigned int bitfield_to_int(const void *bitfield, size_t size) {
+ unsigned int value = 0;
+ if(size > sizeof value)
+ size = sizeof value;
+ memcpy(&value, bitfield, size);
+ return value;
+}