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bindfuncs.go
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bindfuncs.go
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package espresso
import (
"reflect"
"strconv"
)
func getBindFunc(v any) (reflect.Type, BindFunc) {
switch v.(type) {
case *string:
return bindString[string]()
case *int:
return bindInt[int](int(reflect.TypeOf(int(0)).Size()) * 8)
case *int8:
return bindInt[int8](8)
case *int16:
return bindInt[int16](16)
case *int32:
return bindInt[int32](32)
case *int64:
return bindInt[int64](64)
case *uint:
return bindUint[uint](int(reflect.TypeOf(uint(0)).Size()) * 8)
case *uint8:
return bindUint[uint8](8)
case *uint16:
return bindUint[uint16](16)
case *uint32:
return bindUint[uint32](32)
case *uint64:
return bindUint[uint64](64)
case *float32:
return bindFloat[float32](32)
case *float64:
return bindFloat[float64](64)
}
return nil, nil
}
type integer interface {
~int | ~int8 | ~int16 | ~int32 | ~int64
}
func bindInt[T integer](bitSize int) (reflect.Type, BindFunc) {
return reflect.TypeOf(T(0)), func(v any, param string) error {
i, err := strconv.ParseInt(param, 10, bitSize)
if err != nil {
return err
}
p := v.(*T)
*p = T(i)
return nil
}
}
type uinteger interface {
~uint | ~uint8 | ~uint16 | ~uint32 | ~uint64
}
func bindUint[T uinteger](bitSize int) (reflect.Type, BindFunc) {
return reflect.TypeOf(T(0)), func(v any, param string) error {
i, err := strconv.ParseUint(param, 10, bitSize)
if err != nil {
return err
}
p := v.(*T)
*p = T(i)
return nil
}
}
type float interface {
~float32 | ~float64
}
func bindFloat[T float](bitSize int) (reflect.Type, BindFunc) {
return reflect.TypeOf(T(0)), func(v any, param string) error {
i, err := strconv.ParseFloat(param, bitSize)
if err != nil {
return err
}
p := v.(*T)
*p = T(i)
return nil
}
}
func bindString[T ~string]() (reflect.Type, BindFunc) {
return reflect.TypeOf(T("")), func(v any, param string) error {
p := v.(*T)
*p = T(param)
return nil
}
}