261 static void set_field_width(struct printf_spec *spec, int width)  in set_field_width()  argument
263 	spec->field_width = width;  in set_field_width()
264 	if (WARN_ONCE(spec->field_width != width, "field width %d too large",  in set_field_width()
266 		spec->field_width =  in set_field_width()
271 static void set_precision(struct printf_spec *spec, int prec)  in set_precision()  argument
273 	spec->precision = prec;  in set_precision()
274 	if (WARN_ONCE(spec->precision != prec, "precision %d too large",  in set_precision()
276 		spec->precision = clamp(prec, 0, PRECISION_MAX);  in set_precision()
281 number(char *buf, char *end, unsigned long long num, struct printf_spec spec)  in number()  argument
287 	int need_pfx = ((spec.flags & SPECIAL) && spec.base != 10);  in number()
290 	int field_width = spec.field_width;  in number()
291 	int precision = spec.precision;  in number()
295 	locase = (spec.flags & SMALL);  in number()
296 	if (spec.flags & LEFT)  in number()
297 		spec.flags &= ~ZEROPAD;  in number()
299 	if (spec.flags & SIGN) {  in number()
304 		} else if (spec.flags & PLUS) {  in number()
307 		} else if (spec.flags & SPACE) {  in number()
313 		if (spec.base == 16)  in number()
321 	if (num < spec.base)  in number()
323 	else if (spec.base != 10) { /* 8 or 16 */  in number()
324 		int mask = spec.base - 1;  in number()
327 		if (spec.base == 16)  in number()
343 	if (!(spec.flags & (ZEROPAD | LEFT))) {  in number()
358 		if (spec.base == 16 || !is_zero) {  in number()
363 		if (spec.base == 16) {  in number()
370 	if (!(spec.flags & LEFT)) {  in number()
371 		char c = ' ' + (spec.flags & ZEROPAD);  in number()
404 	struct printf_spec spec;  in special_hex_number()  local
406 	spec.type = FORMAT_TYPE_PTR;  in special_hex_number()
407 	spec.field_width = 2 + 2 * size; /* 0x + hex */  in special_hex_number()
408 	spec.flags = SPECIAL | SMALL | ZEROPAD;  in special_hex_number()
409 	spec.base = 16;  in special_hex_number()
410 	spec.precision = -1;  in special_hex_number()
412 	return number(buf, end, num, spec);  in special_hex_number()
442 					     struct printf_spec spec)  in widen_string()  argument
446 	if (likely(n >= spec.field_width))  in widen_string()
449 	spaces = spec.field_width - n;  in widen_string()
450 	if (!(spec.flags & LEFT)) {  in widen_string()
464 			    struct printf_spec spec)  in string_nocheck()  argument
467 	int lim = spec.precision;  in string_nocheck()
478 	return widen_string(buf, len, end, spec);  in string_nocheck()
483 			  struct printf_spec spec)  in error_string()  argument
490 	if (spec.precision == -1)  in error_string()
491 		spec.precision = 2 * sizeof(void *);  in error_string()
493 	return string_nocheck(buf, end, s, spec);  in error_string()
513 			 struct printf_spec spec)  in check_pointer()  argument
519 		*buf = error_string(*buf, end, err_msg, spec);  in check_pointer()
527 				       struct printf_spec spec)  in string()  argument
529 	if (check_pointer(&buf, end, s, spec))  in string()
532 	return string_nocheck(buf, end, s, spec);  in string()
536 			    struct printf_spec spec)  in pointer_string()  argument
538 	spec.base = 16;  in pointer_string()
539 	spec.flags |= SMALL;  in pointer_string()
540 	if (spec.field_width == -1) {  in pointer_string()
541 		spec.field_width = 2 * sizeof(ptr);  in pointer_string()
542 		spec.flags |= ZEROPAD;  in pointer_string()
545 	return number(buf, end, (unsigned long int)ptr, spec);  in pointer_string()
549 					   struct printf_spec spec,  in hex_string()  argument
556 	if (spec.field_width == 0)  in hex_string()
560 	if (check_pointer(&buf, end, addr, spec))  in hex_string()
578 	if (spec.field_width > 0)  in hex_string()
579 		len = min_t(int, spec.field_width, 64);  in hex_string()
601 						   struct printf_spec spec,  in mac_address_string()  argument
610 	if (check_pointer(&buf, end, addr, spec))  in mac_address_string()
638 	return string_nocheck(buf, end, mac_addr, spec);  in mac_address_string()
642 			     struct printf_spec spec)  in default_pointer()  argument
644 	return pointer_string(buf, end, ptr, spec);  in default_pointer()
647 static char *err_ptr(char *buf, char *end, void *ptr, struct printf_spec spec)  in err_ptr()  argument
660 	spec.flags |= SIGN;  in err_ptr()
661 	spec.base = 10;  in err_ptr()
662 	return number(buf, end, err, spec);  in err_ptr()
797 					void *ptr, struct printf_spec spec)  in pointer()  argument
810 		return hex_string(buf, end, ptr, spec, fmt);  in pointer()
822 		return mac_address_string(buf, end, ptr, spec, fmt);  in pointer()
857 		return bdev_name(buf, end, ptr, spec, fmt);  in pointer()
873 		return pointer_string(buf, end, ptr, spec);  in pointer()
877 			return default_pointer(buf, end, ptr, spec);  in pointer()
878 		return err_ptr(buf, end, ptr, spec);  in pointer()
883 			return string(buf, end, ptr, spec);  in pointer()
885 			return error_string(buf, end, "(einval)", spec);  in pointer()
888 		return default_pointer(buf, end, ptr, spec);  in pointer()
914 					    struct printf_spec *spec)  in format_decode()  argument
920 	if (spec->type == FORMAT_TYPE_WIDTH) {  in format_decode()
921 		if (spec->field_width < 0) {  in format_decode()
922 			spec->field_width = -spec->field_width;  in format_decode()
923 			spec->flags |= LEFT;  in format_decode()
925 		spec->type = FORMAT_TYPE_NONE;  in format_decode()
930 	if (spec->type == FORMAT_TYPE_PRECISION) {  in format_decode()
931 		if (spec->precision < 0)  in format_decode()
932 			spec->precision = 0;  in format_decode()
934 		spec->type = FORMAT_TYPE_NONE;  in format_decode()
939 	spec->type = FORMAT_TYPE_NONE;  in format_decode()
951 	spec->flags = 0;  in format_decode()
960 			spec->flags |= LEFT;  in format_decode()
963 			spec->flags |= PLUS;  in format_decode()
966 			spec->flags |= SPACE;  in format_decode()
969 			spec->flags |= SPECIAL;  in format_decode()
972 			spec->flags |= ZEROPAD;  in format_decode()
983 	spec->field_width = -1;  in format_decode()
986 		spec->field_width = skip_atoi(&fmt);  in format_decode()
989 		spec->type = FORMAT_TYPE_WIDTH;  in format_decode()
995 	spec->precision = -1;  in format_decode()
999 			spec->precision = skip_atoi(&fmt);  in format_decode()
1000 			if (spec->precision < 0)  in format_decode()
1001 				spec->precision = 0;  in format_decode()
1004 			spec->type = FORMAT_TYPE_PRECISION;  in format_decode()
1027 	spec->base = 10;  in format_decode()
1030 		spec->type = FORMAT_TYPE_CHAR;  in format_decode()
1034 		spec->type = FORMAT_TYPE_STR;  in format_decode()
1038 		spec->type = FORMAT_TYPE_PTR;  in format_decode()
1042 		spec->type = FORMAT_TYPE_PERCENT_CHAR;  in format_decode()
1047 		spec->base = 8;  in format_decode()
1051 		spec->flags |= SMALL;  in format_decode()
1055 		spec->base = 16;  in format_decode()
1060 		spec->flags |= SIGN;  in format_decode()
1077 		spec->type = FORMAT_TYPE_INVALID;  in format_decode()
1082 		spec->type = FORMAT_TYPE_LONG_LONG;  in format_decode()
1085 		spec->type = FORMAT_TYPE_ULONG + (spec->flags & SIGN);  in format_decode()
1087 		spec->type = FORMAT_TYPE_SIZE_T;  in format_decode()
1089 		spec->type = FORMAT_TYPE_PTRDIFF;  in format_decode()
1092 		spec->type = FORMAT_TYPE_UBYTE + (spec->flags & SIGN);  in format_decode()
1095 		spec->type = FORMAT_TYPE_USHORT + (spec->flags & SIGN);  in format_decode()
1098 		spec->type = FORMAT_TYPE_UINT + (spec->flags & SIGN);  in format_decode()
1136 	struct printf_spec spec = { 0 };  in vsnprintf()  local
1154 		int read = format_decode(fmt, &spec);  in vsnprintf()
1158 		switch (spec.type) {  in vsnprintf()
1171 			set_field_width(&spec, va_arg(args, int));  in vsnprintf()
1175 			set_precision(&spec, va_arg(args, int));  in vsnprintf()
1181 			if (!(spec.flags & LEFT)) {  in vsnprintf()
1182 				while (--spec.field_width > 0) {  in vsnprintf()
1192 			while (--spec.field_width > 0) {  in vsnprintf()
1201 			str = string(str, end, va_arg(args, char *), spec);  in vsnprintf()
1206 				      spec);  in vsnprintf()
1229 			switch (spec.type) {  in vsnprintf()
1240 				if (spec.flags & SIGN)  in vsnprintf()
1267 			str = number(str, end, num, spec);  in vsnprintf()