Import to pgx main repo in pgtype subdir

2021-12-04 13:07:54 -06:00
parent 550cc7b529
commit 44214b7854
237 changed files with 0 additions and 0 deletions
@@ -0,0 +1,258 @@
+package pgtype
+
+import (
+	"database/sql/driver"
+	"encoding/binary"
+	"fmt"
+	"math"
+	"strconv"
+
+	"github.com/jackc/pgio"
+)
+
+type Float8 struct {
+	Float float64
+	Valid bool
+}
+
+func (dst *Float8) Set(src interface{}) error {
+	if src == nil {
+		*dst = Float8{}
+		return nil
+	}
+
+	if value, ok := src.(interface{ Get() interface{} }); ok {
+		value2 := value.Get()
+		if value2 != value {
+			return dst.Set(value2)
+		}
+	}
+
+	switch value := src.(type) {
+	case float32:
+		*dst = Float8{Float: float64(value), Valid: true}
+	case float64:
+		*dst = Float8{Float: value, Valid: true}
+	case int8:
+		*dst = Float8{Float: float64(value), Valid: true}
+	case uint8:
+		*dst = Float8{Float: float64(value), Valid: true}
+	case int16:
+		*dst = Float8{Float: float64(value), Valid: true}
+	case uint16:
+		*dst = Float8{Float: float64(value), Valid: true}
+	case int32:
+		*dst = Float8{Float: float64(value), Valid: true}
+	case uint32:
+		*dst = Float8{Float: float64(value), Valid: true}
+	case int64:
+		f64 := float64(value)
+		if int64(f64) == value {
+			*dst = Float8{Float: f64, Valid: true}
+		} else {
+			return fmt.Errorf("%v cannot be exactly represented as float64", value)
+		}
+	case uint64:
+		f64 := float64(value)
+		if uint64(f64) == value {
+			*dst = Float8{Float: f64, Valid: true}
+		} else {
+			return fmt.Errorf("%v cannot be exactly represented as float64", value)
+		}
+	case int:
+		f64 := float64(value)
+		if int(f64) == value {
+			*dst = Float8{Float: f64, Valid: true}
+		} else {
+			return fmt.Errorf("%v cannot be exactly represented as float64", value)
+		}
+	case uint:
+		f64 := float64(value)
+		if uint(f64) == value {
+			*dst = Float8{Float: f64, Valid: true}
+		} else {
+			return fmt.Errorf("%v cannot be exactly represented as float64", value)
+		}
+	case string:
+		num, err := strconv.ParseFloat(value, 64)
+		if err != nil {
+			return err
+		}
+		*dst = Float8{Float: float64(num), Valid: true}
+	case *float64:
+		if value == nil {
+			*dst = Float8{}
+		} else {
+			return dst.Set(*value)
+		}
+	case *float32:
+		if value == nil {
+			*dst = Float8{}
+		} else {
+			return dst.Set(*value)
+		}
+	case *int8:
+		if value == nil {
+			*dst = Float8{}
+		} else {
+			return dst.Set(*value)
+		}
+	case *uint8:
+		if value == nil {
+			*dst = Float8{}
+		} else {
+			return dst.Set(*value)
+		}
+	case *int16:
+		if value == nil {
+			*dst = Float8{}
+		} else {
+			return dst.Set(*value)
+		}
+	case *uint16:
+		if value == nil {
+			*dst = Float8{}
+		} else {
+			return dst.Set(*value)
+		}
+	case *int32:
+		if value == nil {
+			*dst = Float8{}
+		} else {
+			return dst.Set(*value)
+		}
+	case *uint32:
+		if value == nil {
+			*dst = Float8{}
+		} else {
+			return dst.Set(*value)
+		}
+	case *int64:
+		if value == nil {
+			*dst = Float8{}
+		} else {
+			return dst.Set(*value)
+		}
+	case *uint64:
+		if value == nil {
+			*dst = Float8{}
+		} else {
+			return dst.Set(*value)
+		}
+	case *int:
+		if value == nil {
+			*dst = Float8{}
+		} else {
+			return dst.Set(*value)
+		}
+	case *uint:
+		if value == nil {
+			*dst = Float8{}
+		} else {
+			return dst.Set(*value)
+		}
+	case *string:
+		if value == nil {
+			*dst = Float8{}
+		} else {
+			return dst.Set(*value)
+		}
+	default:
+		if originalSrc, ok := underlyingNumberType(src); ok {
+			return dst.Set(originalSrc)
+		}
+		return fmt.Errorf("cannot convert %v to Float8", value)
+	}
+
+	return nil
+}
+
+func (dst Float8) Get() interface{} {
+	if !dst.Valid {
+		return nil
+	}
+	return dst.Float
+}
+
+func (src *Float8) AssignTo(dst interface{}) error {
+	return float64AssignTo(src.Float, src.Valid, dst)
+}
+
+func (dst *Float8) DecodeText(ci *ConnInfo, src []byte) error {
+	if src == nil {
+		*dst = Float8{}
+		return nil
+	}
+
+	n, err := strconv.ParseFloat(string(src), 64)
+	if err != nil {
+		return err
+	}
+
+	*dst = Float8{Float: n, Valid: true}
+	return nil
+}
+
+func (dst *Float8) DecodeBinary(ci *ConnInfo, src []byte) error {
+	if src == nil {
+		*dst = Float8{}
+		return nil
+	}
+
+	if len(src) != 8 {
+		return fmt.Errorf("invalid length for float4: %v", len(src))
+	}
+
+	n := int64(binary.BigEndian.Uint64(src))
+
+	*dst = Float8{Float: math.Float64frombits(uint64(n)), Valid: true}
+	return nil
+}
+
+func (src Float8) EncodeText(ci *ConnInfo, buf []byte) ([]byte, error) {
+	if !src.Valid {
+		return nil, nil
+	}
+
+	buf = append(buf, strconv.FormatFloat(float64(src.Float), 'f', -1, 64)...)
+	return buf, nil
+}
+
+func (src Float8) EncodeBinary(ci *ConnInfo, buf []byte) ([]byte, error) {
+	if !src.Valid {
+		return nil, nil
+	}
+
+	buf = pgio.AppendUint64(buf, math.Float64bits(src.Float))
+	return buf, nil
+}
+
+// Scan implements the database/sql Scanner interface.
+func (dst *Float8) Scan(src interface{}) error {
+	if src == nil {
+		*dst = Float8{}
+		return nil
+	}
+
+	switch src := src.(type) {
+	case float64:
+		*dst = Float8{Float: src, Valid: true}
+		return nil
+	case string:
+		return dst.DecodeText(nil, []byte(src))
+	case []byte:
+		srcCopy := make([]byte, len(src))
+		copy(srcCopy, src)
+		return dst.DecodeText(nil, srcCopy)
+	}
+
+	return fmt.Errorf("cannot scan %T", src)
+}
+
+// Value implements the database/sql/driver Valuer interface.
+func (src Float8) Value() (driver.Value, error) {
+	if !src.Valid {
+		return nil, nil
+	}
+	return src.Float, nil
+}