+#define VA_FORMAT_ADVANCE(format, ap) \
+do { \
+ int _argtypes[128]; \
+ size_t _i, _k; \
+ _k = parse_printf_format((format), ELEMENTSOF(_argtypes), _argtypes); \
+ assert(_k < ELEMENTSOF(_argtypes)); \
+ for (_i = 0; _i < _k; _i++) { \
+ if (_argtypes[_i] & PA_FLAG_PTR) { \
+ (void) va_arg(ap, void*); \
+ continue; \
+ } \
+ \
+ switch (_argtypes[_i]) { \
+ case PA_INT: \
+ case PA_INT|PA_FLAG_SHORT: \
+ case PA_CHAR: \
+ (void) va_arg(ap, int); \
+ break; \
+ case PA_INT|PA_FLAG_LONG: \
+ (void) va_arg(ap, long int); \
+ break; \
+ case PA_INT|PA_FLAG_LONG_LONG: \
+ (void) va_arg(ap, long long int); \
+ break; \
+ case PA_WCHAR: \
+ (void) va_arg(ap, wchar_t); \
+ break; \
+ case PA_WSTRING: \
+ case PA_STRING: \
+ case PA_POINTER: \
+ (void) va_arg(ap, void*); \
+ break; \
+ case PA_FLOAT: \
+ case PA_DOUBLE: \
+ (void) va_arg(ap, double); \
+ break; \
+ case PA_DOUBLE|PA_FLAG_LONG_DOUBLE: \
+ (void) va_arg(ap, long double); \
+ break; \
+ default: \
+ assert_not_reached("Unknown format string argument."); \
+ } \
+ } \
+} while(false)
+
+/* Remove this macro, when the kernel has f_type as unsigned int or long
+ * for every architecure. Currently some 64bit architecures (like s390x)
+ * have int in the kernel, but long in userspace for f_type, so glibc
+ * extends the int to long and carries over the sign. Negative numbers are
+ * caused by the 32bit magic constants in linux/magic.h stuffed into the
+ * signed int in the kernel and these negative numbers are extended to
+ * long, which cannot be simply compared to the magic constants anymore.
+ */
+#define F_TYPE_CMP(f_type, magic) \
+ __extension__ ({ \
+ __SWORD_TYPE _f = (f_type); \
+ const __SWORD_TYPE _c = (magic); \
+ const int _c32 = 1 ? (magic) \
+ : sizeof((int[magic]){0}); \
+ (_f == _c || _f == _c32 ); \
+ })
+
+
+/* Returns the number of chars needed to format variables of the
+ * specified type as a decimal string. Adds in extra space for a
+ * negative '-' prefix. */
+
+#define DECIMAL_STR_MAX(type) \
+ (1+(sizeof(type) <= 1 ? 3 : \
+ sizeof(type) <= 2 ? 5 : \
+ sizeof(type) <= 4 ? 10 : \
+ sizeof(type) <= 8 ? 20 : sizeof(int[-2*(sizeof(type) > 8)])))
+