migrate go version to 1.17 (#203)

* migrate go version to 1.17

* update contributing

1 files changed, 190 insertions, 0 deletions

diff --git a/vendor/github.com/goccy/go-json/internal/decoder/uint.go b/vendor/github.com/goccy/go-json/internal/decoder/uint.go
new file mode 100644
index 000000000..a62c51492
--- /dev/null
+++ b/vendor/github.com/goccy/go-json/internal/decoder/uint.go
@@ -0,0 +1,190 @@
+package decoder
+
+import (
+	"fmt"
+	"reflect"
+	"unsafe"
+
+	"github.com/goccy/go-json/internal/errors"
+	"github.com/goccy/go-json/internal/runtime"
+)
+
+type uintDecoder struct {
+	typ        *runtime.Type
+	kind       reflect.Kind
+	op         func(unsafe.Pointer, uint64)
+	structName string
+	fieldName  string
+}
+
+func newUintDecoder(typ *runtime.Type, structName, fieldName string, op func(unsafe.Pointer, uint64)) *uintDecoder {
+	return &uintDecoder{
+		typ:        typ,
+		kind:       typ.Kind(),
+		op:         op,
+		structName: structName,
+		fieldName:  fieldName,
+	}
+}
+
+func (d *uintDecoder) typeError(buf []byte, offset int64) *errors.UnmarshalTypeError {
+	return &errors.UnmarshalTypeError{
+		Value:  fmt.Sprintf("number %s", string(buf)),
+		Type:   runtime.RType2Type(d.typ),
+		Offset: offset,
+	}
+}
+
+var (
+	pow10u64 = [...]uint64{
+		1e00, 1e01, 1e02, 1e03, 1e04, 1e05, 1e06, 1e07, 1e08, 1e09,
+		1e10, 1e11, 1e12, 1e13, 1e14, 1e15, 1e16, 1e17, 1e18, 1e19,
+	}
+	pow10u64Len = len(pow10u64)
+)
+
+func (d *uintDecoder) parseUint(b []byte) (uint64, error) {
+	maxDigit := len(b)
+	if maxDigit > pow10u64Len {
+		return 0, fmt.Errorf("invalid length of number")
+	}
+	sum := uint64(0)
+	for i := 0; i < maxDigit; i++ {
+		c := uint64(b[i]) - 48
+		digitValue := pow10u64[maxDigit-i-1]
+		sum += c * digitValue
+	}
+	return sum, nil
+}
+
+func (d *uintDecoder) decodeStreamByte(s *Stream) ([]byte, error) {
+	for {
+		switch s.char() {
+		case ' ', '\n', '\t', '\r':
+			s.cursor++
+			continue
+		case '0':
+			s.cursor++
+			return numZeroBuf, nil
+		case '1', '2', '3', '4', '5', '6', '7', '8', '9':
+			start := s.cursor
+			for {
+				s.cursor++
+				if numTable[s.char()] {
+					continue
+				} else if s.char() == nul {
+					if s.read() {
+						s.cursor-- // for retry current character
+						continue
+					}
+				}
+				break
+			}
+			num := s.buf[start:s.cursor]
+			return num, nil
+		case 'n':
+			if err := nullBytes(s); err != nil {
+				return nil, err
+			}
+			return nil, nil
+		case nul:
+			if s.read() {
+				continue
+			}
+		default:
+			return nil, d.typeError([]byte{s.char()}, s.totalOffset())
+		}
+		break
+	}
+	return nil, errors.ErrUnexpectedEndOfJSON("number(unsigned integer)", s.totalOffset())
+}
+
+func (d *uintDecoder) decodeByte(buf []byte, cursor int64) ([]byte, int64, error) {
+	for {
+		switch buf[cursor] {
+		case ' ', '\n', '\t', '\r':
+			cursor++
+			continue
+		case '0':
+			cursor++
+			return numZeroBuf, cursor, nil
+		case '1', '2', '3', '4', '5', '6', '7', '8', '9':
+			start := cursor
+			cursor++
+			for numTable[buf[cursor]] {
+				cursor++
+			}
+			num := buf[start:cursor]
+			return num, cursor, nil
+		case 'n':
+			if err := validateNull(buf, cursor); err != nil {
+				return nil, 0, err
+			}
+			cursor += 4
+			return nil, cursor, nil
+		default:
+			return nil, 0, d.typeError([]byte{buf[cursor]}, cursor)
+		}
+	}
+}
+
+func (d *uintDecoder) DecodeStream(s *Stream, depth int64, p unsafe.Pointer) error {
+	bytes, err := d.decodeStreamByte(s)
+	if err != nil {
+		return err
+	}
+	if bytes == nil {
+		return nil
+	}
+	u64, err := d.parseUint(bytes)
+	if err != nil {
+		return d.typeError(bytes, s.totalOffset())
+	}
+	switch d.kind {
+	case reflect.Uint8:
+		if (1 << 8) <= u64 {
+			return d.typeError(bytes, s.totalOffset())
+		}
+	case reflect.Uint16:
+		if (1 << 16) <= u64 {
+			return d.typeError(bytes, s.totalOffset())
+		}
+	case reflect.Uint32:
+		if (1 << 32) <= u64 {
+			return d.typeError(bytes, s.totalOffset())
+		}
+	}
+	d.op(p, u64)
+	return nil
+}
+
+func (d *uintDecoder) Decode(ctx *RuntimeContext, cursor, depth int64, p unsafe.Pointer) (int64, error) {
+	bytes, c, err := d.decodeByte(ctx.Buf, cursor)
+	if err != nil {
+		return 0, err
+	}
+	if bytes == nil {
+		return c, nil
+	}
+	cursor = c
+	u64, err := d.parseUint(bytes)
+	if err != nil {
+		return 0, d.typeError(bytes, cursor)
+	}
+	switch d.kind {
+	case reflect.Uint8:
+		if (1 << 8) <= u64 {
+			return 0, d.typeError(bytes, cursor)
+		}
+	case reflect.Uint16:
+		if (1 << 16) <= u64 {
+			return 0, d.typeError(bytes, cursor)
+		}
+	case reflect.Uint32:
+		if (1 << 32) <= u64 {
+			return 0, d.typeError(bytes, cursor)
+		}
+	}
+	d.op(p, u64)
+	return cursor, nil
+}