mirror of
https://gitee.com/johng/gf
synced 2026-06-30 11:05:11 +08:00
402 lines
10 KiB
Go
402 lines
10 KiB
Go
// Copyright 2017 gf Author(https://github.com/gogf/gf). All Rights Reserved.
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//
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// This Source Code Form is subject to the terms of the MIT License.
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// If a copy of the MIT was not distributed with this file,
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// You can obtain one at https://github.com/gogf/gf.
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// Package gconv implements powerful and easy-to-use converting functionality for any types of variables.
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package gconv
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import (
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"encoding/json"
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"github.com/gogf/gf/g/encoding/gbinary"
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"reflect"
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"strconv"
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"strings"
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)
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// Type assert api for String().
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type apiString interface {
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String() string
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}
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// Type assert api for Error().
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type apiError interface {
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Error() string
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}
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var (
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// Empty strings.
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emptyStringMap = map[string]struct{}{
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"" : struct {}{},
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"0" : struct {}{},
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"off" : struct {}{},
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"false" : struct {}{},
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}
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)
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// Convert converts the variable <i> to the type <t>, the type <t> is specified by string.
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// The unnecessary parameter <params> is used for additional parameter passing.
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func Convert(i interface{}, t string, params...interface{}) interface{} {
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switch t {
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case "int": return Int(i)
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case "int8": return Int8(i)
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case "int16": return Int16(i)
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case "int32": return Int32(i)
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case "int64": return Int64(i)
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case "uint": return Uint(i)
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case "uint8": return Uint8(i)
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case "uint16": return Uint16(i)
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case "uint32": return Uint32(i)
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case "uint64": return Uint64(i)
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case "float32": return Float32(i)
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case "float64": return Float64(i)
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case "bool": return Bool(i)
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case "string": return String(i)
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case "[]byte": return Bytes(i)
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case "[]int": return Ints(i)
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case "[]string": return Strings(i)
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case "Time", "time.Time":
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if len(params) > 0 {
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return Time(i, String(params[0]))
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}
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return Time(i)
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case "gtime.Time":
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if len(params) > 0 {
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return GTime(i, String(params[0]))
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}
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return *GTime(i)
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case "GTime", "*gtime.Time":
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if len(params) > 0 {
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return GTime(i, String(params[0]))
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}
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return GTime(i)
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case "Duration", "time.Duration":
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return Duration(i)
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default:
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return i
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}
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}
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// Byte converts <i> to byte.
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func Byte(i interface{}) byte {
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if v, ok := i.(byte); ok {
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return v
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}
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return byte(Uint8(i))
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}
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// Bytes converts <i> to []byte.
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func Bytes(i interface{}) []byte {
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if i == nil {
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return nil
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}
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switch value := i.(type) {
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case string: return []byte(value)
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case []byte: return value
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default:
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return gbinary.Encode(i)
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}
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}
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// Rune converts <i> to rune.
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func Rune(i interface{}) rune {
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if v, ok := i.(rune); ok {
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return v
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}
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return rune(Int32(i))
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}
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// Runes converts <i> to []rune.
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func Runes(i interface{}) []rune {
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if v, ok := i.([]rune); ok {
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return v
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}
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return []rune(String(i))
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}
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// String converts <i> to string.
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func String(i interface{}) string {
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if i == nil {
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return ""
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}
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switch value := i.(type) {
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case int: return strconv.FormatInt(int64(value), 10)
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case int8: return strconv.Itoa(int(value))
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case int16: return strconv.Itoa(int(value))
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case int32: return strconv.Itoa(int(value))
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case int64: return strconv.FormatInt(int64(value), 10)
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case uint: return strconv.FormatUint(uint64(value), 10)
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case uint8: return strconv.FormatUint(uint64(value), 10)
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case uint16: return strconv.FormatUint(uint64(value), 10)
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case uint32: return strconv.FormatUint(uint64(value), 10)
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case uint64: return strconv.FormatUint(uint64(value), 10)
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case float32: return strconv.FormatFloat(float64(value), 'f', -1, 32)
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case float64: return strconv.FormatFloat(value, 'f', -1, 64)
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case bool: return strconv.FormatBool(value)
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case string: return value
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case []byte: return string(value)
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case []rune: return string(value)
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default:
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if f, ok := value.(apiString); ok {
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// If the variable implements the String() interface,
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// then use that interface to perform the conversion
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return f.String()
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} else if f, ok := value.(apiError); ok {
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// If the variable implements the Error() interface,
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// then use that interface to perform the conversion
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return f.Error()
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} else {
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// Finally we use json.Marshal to convert.
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jsonContent, _ := json.Marshal(value)
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return string(jsonContent)
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}
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}
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}
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// Bool converts <i> to bool.
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// It returns false if <i> is: false, "", 0, "false", "off", empty slice/map.
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func Bool(i interface{}) bool {
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if i == nil {
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return false
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}
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if v, ok := i.(bool); ok {
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return v
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}
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if s, ok := i.(string); ok {
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if _, ok := emptyStringMap[s]; ok {
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return false
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}
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return true
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}
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rv := reflect.ValueOf(i)
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switch rv.Kind() {
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case reflect.Ptr: return !rv.IsNil()
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case reflect.Map: fallthrough
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case reflect.Array: fallthrough
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case reflect.Slice: return rv.Len() != 0
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case reflect.Struct: return true
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default:
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s := String(i)
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if _, ok := emptyStringMap[s]; ok {
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return false
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}
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return true
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}
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}
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// Int converts <i> to int.
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func Int(i interface{}) int {
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if i == nil {
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return 0
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}
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if v, ok := i.(int); ok {
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return v
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}
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return int(Int64(i))
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}
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// Int8 converts <i> to int8.
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func Int8(i interface{}) int8 {
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if i == nil {
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return 0
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}
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if v, ok := i.(int8); ok {
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return v
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}
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return int8(Int64(i))
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}
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// Int16 converts <i> to int16.
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func Int16(i interface{}) int16 {
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if i == nil {
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return 0
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}
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if v, ok := i.(int16); ok {
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return v
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}
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return int16(Int64(i))
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}
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// Int32 converts <i> to int32.
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func Int32(i interface{}) int32 {
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if i == nil {
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return 0
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}
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if v, ok := i.(int32); ok {
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return v
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}
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return int32(Int64(i))
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}
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// Int64 converts <i> to int64.
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func Int64(i interface{}) int64 {
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if i == nil {
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return 0
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}
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if v, ok := i.(int64); ok {
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return v
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}
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switch value := i.(type) {
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case int: return int64(value)
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case int8: return int64(value)
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case int16: return int64(value)
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case int32: return int64(value)
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case int64: return value
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case uint: return int64(value)
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case uint8: return int64(value)
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case uint16: return int64(value)
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case uint32: return int64(value)
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case uint64: return int64(value)
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case float32: return int64(value)
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case float64: return int64(value)
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case bool:
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if value {
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return 1
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}
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return 0
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default:
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s := String(value)
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// Hexadecimal
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if len(s) > 2 && s[0] == '0' && (s[1] == 'x' || s[1] == 'X') {
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if v, e := strconv.ParseInt(s[2 : ], 16, 64); e == nil {
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return v
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}
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}
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// Octal
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if len(s) > 1 && s[0] == '0' {
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if v, e := strconv.ParseInt(s[1 : ], 8, 64); e == nil {
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return v
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}
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}
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// Decimal
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if v, e := strconv.ParseInt(s, 10, 64); e == nil {
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return v
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}
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// Float64
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return int64(Float64(value))
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}
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}
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// Uint converts <i> to uint.
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func Uint(i interface{}) uint {
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if i == nil {
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return 0
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}
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if v, ok := i.(uint); ok {
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return v
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}
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return uint(Uint64(i))
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}
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// Uint8 converts <i> to uint8.
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func Uint8(i interface{}) uint8 {
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if i == nil {
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return 0
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}
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if v, ok := i.(uint8); ok {
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return v
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}
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return uint8(Uint64(i))
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}
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// Uint16 converts <i> to uint16.
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func Uint16(i interface{}) uint16 {
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if i == nil {
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return 0
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}
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if v, ok := i.(uint16); ok {
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return v
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}
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return uint16(Uint64(i))
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}
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// Uint32 converts <i> to uint32.
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func Uint32(i interface{}) uint32 {
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if i == nil {
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return 0
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}
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if v, ok := i.(uint32); ok {
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return v
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}
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return uint32(Uint64(i))
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}
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// Uint64 converts <i> to uint64.
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func Uint64(i interface{}) uint64 {
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if i == nil {
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return 0
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}
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switch value := i.(type) {
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case int: return uint64(value)
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case int8: return uint64(value)
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case int16: return uint64(value)
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case int32: return uint64(value)
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case int64: return uint64(value)
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case uint: return uint64(value)
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case uint8: return uint64(value)
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case uint16: return uint64(value)
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case uint32: return uint64(value)
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case uint64: return value
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case float32: return uint64(value)
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case float64: return uint64(value)
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case bool:
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if value {
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return 1
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}
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return 0
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default:
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s := String(value)
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// Hexadecimal
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if len(s) > 2 && s[0] == '0' && (s[1] == 'x' || s[1] == 'X') {
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if v, e := strconv.ParseUint(s[2 : ], 16, 64); e == nil {
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return v
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}
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}
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// Octal
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if len(s) > 1 && s[0] == '0' {
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if v, e := strconv.ParseUint(s[1 : ], 8, 64); e == nil {
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return v
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}
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}
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// Decimal
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if v, e := strconv.ParseUint(s, 10, 64); e == nil {
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return v
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}
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// Float64
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return uint64(Float64(value))
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}
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}
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// Float32 converts <i> to float32.
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func Float32 (i interface{}) float32 {
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if i == nil {
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return 0
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}
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if v, ok := i.(float32); ok {
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return v
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}
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v, _ := strconv.ParseFloat(strings.TrimSpace(String(i)), 64)
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return float32(v)
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}
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// Float64 converts <i> to float64.
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func Float64 (i interface{}) float64 {
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if i == nil {
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return 0
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}
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if v, ok := i.(float64); ok {
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return v
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}
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v, _ := strconv.ParseFloat(strings.TrimSpace(String(i)), 64)
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return v
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}
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