switch to go vendoring

vendor/github.com/shamaton/msgpack/v2/internal/decoding/int.go

@@ -0,0 +1,128 @@
+package decoding
+
+import (
+	"encoding/binary"
+	"reflect"
+
+	"github.com/shamaton/msgpack/v2/def"
+)
+
+func (d *decoder) isPositiveFixNum(v byte) bool {
+	return def.PositiveFixIntMin <= v && v <= def.PositiveFixIntMax
+}
+
+func (d *decoder) isNegativeFixNum(v byte) bool {
+	return def.NegativeFixintMin <= int8(v) && int8(v) <= def.NegativeFixintMax
+}
+
+func (d *decoder) asInt(offset int, k reflect.Kind) (int64, int, error) {
+
+	code, _, err := d.readSize1(offset)
+	if err != nil {
+		return 0, 0, err
+	}
+
+	switch {
+	case d.isPositiveFixNum(code):
+		b, offset, err := d.readSize1(offset)
+		if err != nil {
+			return 0, 0, err
+		}
+		return int64(b), offset, nil
+
+	case d.isNegativeFixNum(code):
+		b, offset, err := d.readSize1(offset)
+		if err != nil {
+			return 0, 0, err
+		}
+		return int64(int8(b)), offset, nil
+
+	case code == def.Uint8:
+		offset++
+		b, offset, err := d.readSize1(offset)
+		if err != nil {
+			return 0, 0, err
+		}
+		return int64(uint8(b)), offset, nil
+
+	case code == def.Int8:
+		offset++
+		b, offset, err := d.readSize1(offset)
+		if err != nil {
+			return 0, 0, err
+		}
+		return int64(int8(b)), offset, nil
+
+	case code == def.Uint16:
+		offset++
+		bs, offset, err := d.readSize2(offset)
+		if err != nil {
+			return 0, 0, err
+		}
+		v := binary.BigEndian.Uint16(bs)
+		return int64(v), offset, nil
+
+	case code == def.Int16:
+		offset++
+		bs, offset, err := d.readSize2(offset)
+		if err != nil {
+			return 0, 0, err
+		}
+		v := int16(binary.BigEndian.Uint16(bs))
+		return int64(v), offset, nil
+
+	case code == def.Uint32:
+		offset++
+		bs, offset, err := d.readSize4(offset)
+		if err != nil {
+			return 0, 0, err
+		}
+		v := binary.BigEndian.Uint32(bs)
+		return int64(v), offset, nil
+
+	case code == def.Int32:
+		offset++
+		bs, offset, err := d.readSize4(offset)
+		if err != nil {
+			return 0, 0, err
+		}
+		v := int32(binary.BigEndian.Uint32(bs))
+		return int64(v), offset, nil
+
+	case code == def.Uint64:
+		offset++
+		bs, offset, err := d.readSize8(offset)
+		if err != nil {
+			return 0, 0, err
+		}
+		return int64(binary.BigEndian.Uint64(bs)), offset, nil
+
+	case code == def.Int64:
+		offset++
+		bs, offset, err := d.readSize8(offset)
+		if err != nil {
+			return 0, 0, err
+		}
+		return int64(binary.BigEndian.Uint64(bs)), offset, nil
+
+	case code == def.Float32:
+		v, offset, err := d.asFloat32(offset, k)
+		if err != nil {
+			return 0, 0, err
+		}
+		return int64(v), offset, nil
+
+	case code == def.Float64:
+		v, offset, err := d.asFloat64(offset, k)
+		if err != nil {
+			return 0, 0, err
+		}
+		return int64(v), offset, nil
+
+	case code == def.Nil:
+		offset++
+		return 0, offset, nil
+	}
+
+	return 0, 0, d.errorTemplate(code, k)
+}