1 files changed, 46 insertions, 8 deletions
diff --git a/vendor/modernc.org/libc/printf.go b/vendor/modernc.org/libc/printf.go
index d6de15d5d..be9242a46 100644
--- a/vendor/modernc.org/libc/printf.go
+++ b/vendor/modernc.org/libc/printf.go
@@ -38,17 +38,17 @@ const (
 // the output stream; and conversion specifications, each of which results in
 // fetching zero or more subsequent arguments.
 func printf(format, args uintptr) []byte {
-	format0 := format
-	args0 := args
+	// format0 := format
+	// args0 := args
 	buf := bytes.NewBuffer(nil)
 	for {
 		switch c := *(*byte)(unsafe.Pointer(format)); c {
 		case '%':
 			format = printfConversion(buf, format, &args)
 		case 0:
-			if dmesgs {
-				dmesg("%v: %q, %#x -> %q", origin(1), GoString(format0), args0, buf.Bytes())
-			}
+			// 			if dmesgs {
+			// 				dmesg("%v: %q, %#x -> %q", origin(1), GoString(format0), args0, buf.Bytes())
+			// 			}
 			return buf.Bytes()
 		default:
 			format++
@@ -114,7 +114,7 @@ flags:
 			break flags
 		}
 	}
-	format, width, hasWidth := parseFieldWidth(format)
+	format, width, hasWidth := parseFieldWidth(format, args)
 	if hasWidth {
 		spec += strconv.Itoa(width)
 	}
@@ -239,6 +239,38 @@ more:
 
 		f := spec + "o"
 		str = fmt.Sprintf(f, arg)
+	case 'b':
+		// Base 2.
+		format++
+		var arg uint64
+		if isWindows && mod == modL {
+			mod = modNone
+		}
+		switch mod {
+		case modNone:
+			arg = uint64(VaUint32(args))
+		case modL, modLL, mod64:
+			arg = VaUint64(args)
+		case modH:
+			arg = uint64(uint16(VaInt32(args)))
+		case modHH:
+			arg = uint64(uint8(VaInt32(args)))
+		case mod32:
+			arg = uint64(VaInt32(args))
+		default:
+			panic(todo("", mod))
+		}
+
+		if arg == 0 && hasPrecision && prec == 0 {
+			break
+		}
+
+		if hasPrecision {
+			panic(todo("", prec))
+		}
+
+		f := spec + "b"
+		str = fmt.Sprintf(f, arg)
 	case 'I':
 		if !isWindows {
 			panic(todo("%#U", c))
@@ -474,7 +506,7 @@ more:
 // nonexistent or small field width cause truncation of a field; if the result
 // of a conversion is wider than the field width, the field is expanded to
 // contain the conversion result.
-func parseFieldWidth(format uintptr) (_ uintptr, n int, ok bool) {
+func parseFieldWidth(format uintptr, args *uintptr) (_ uintptr, n int, ok bool) {
 	first := true
 	for {
 		var digit int
@@ -482,7 +514,13 @@ func parseFieldWidth(format uintptr) (_ uintptr, n int, ok bool) {
 		case first && c == '0':
 			return format, n, ok
 		case first && c == '*':
-			panic(todo(""))
+			format++
+			switch c := *(*byte)(unsafe.Pointer(format)); {
+			case c >= '0' && c <= '9':
+				panic(todo(""))
+			default:
+				return format, int(VaInt32(args)), true
+			}
 		case c >= '0' && c <= '9':
 			format++
 			ok = true