package orm import ( "fmt" "reflect" "strconv" "strings" "time" ) type StrTo string // set string func (f *StrTo) Set(v string) { if v != "" { *f = StrTo(v) } else { f.Clear() } } // clean string func (f *StrTo) Clear() { *f = StrTo(0x1E) } // check string exist func (f StrTo) Exist() bool { return string(f) != string(0x1E) } // string to bool func (f StrTo) Bool() (bool, error) { return strconv.ParseBool(f.String()) } // string to float32 func (f StrTo) Float32() (float32, error) { v, err := strconv.ParseFloat(f.String(), 32) return float32(v), err } // string to float64 func (f StrTo) Float64() (float64, error) { return strconv.ParseFloat(f.String(), 64) } // string to int func (f StrTo) Int() (int, error) { v, err := strconv.ParseInt(f.String(), 10, 32) return int(v), err } // string to int8 func (f StrTo) Int8() (int8, error) { v, err := strconv.ParseInt(f.String(), 10, 8) return int8(v), err } // string to int16 func (f StrTo) Int16() (int16, error) { v, err := strconv.ParseInt(f.String(), 10, 16) return int16(v), err } // string to int32 func (f StrTo) Int32() (int32, error) { v, err := strconv.ParseInt(f.String(), 10, 32) return int32(v), err } // string to int64 func (f StrTo) Int64() (int64, error) { v, err := strconv.ParseInt(f.String(), 10, 64) return int64(v), err } // string to uint func (f StrTo) Uint() (uint, error) { v, err := strconv.ParseUint(f.String(), 10, 32) return uint(v), err } // string to uint8 func (f StrTo) Uint8() (uint8, error) { v, err := strconv.ParseUint(f.String(), 10, 8) return uint8(v), err } // string to uint16 func (f StrTo) Uint16() (uint16, error) { v, err := strconv.ParseUint(f.String(), 10, 16) return uint16(v), err } // string to uint31 func (f StrTo) Uint32() (uint32, error) { v, err := strconv.ParseUint(f.String(), 10, 32) return uint32(v), err } // string to uint64 func (f StrTo) Uint64() (uint64, error) { v, err := strconv.ParseUint(f.String(), 10, 64) return uint64(v), err } // string to string func (f StrTo) String() string { if f.Exist() { return string(f) } return "" } // interface to string func ToStr(value interface{}, args ...int) (s string) { switch v := value.(type) { case bool: s = strconv.FormatBool(v) case float32: s = strconv.FormatFloat(float64(v), 'f', argInt(args).Get(0, -1), argInt(args).Get(1, 32)) case float64: s = strconv.FormatFloat(v, 'f', argInt(args).Get(0, -1), argInt(args).Get(1, 64)) case int: s = strconv.FormatInt(int64(v), argInt(args).Get(0, 10)) case int8: s = strconv.FormatInt(int64(v), argInt(args).Get(0, 10)) case int16: s = strconv.FormatInt(int64(v), argInt(args).Get(0, 10)) case int32: s = strconv.FormatInt(int64(v), argInt(args).Get(0, 10)) case int64: s = strconv.FormatInt(v, argInt(args).Get(0, 10)) case uint: s = strconv.FormatUint(uint64(v), argInt(args).Get(0, 10)) case uint8: s = strconv.FormatUint(uint64(v), argInt(args).Get(0, 10)) case uint16: s = strconv.FormatUint(uint64(v), argInt(args).Get(0, 10)) case uint32: s = strconv.FormatUint(uint64(v), argInt(args).Get(0, 10)) case uint64: s = strconv.FormatUint(v, argInt(args).Get(0, 10)) case string: s = v case []byte: s = string(v) default: s = fmt.Sprintf("%v", v) } return s } // interface to int64 func ToInt64(value interface{}) (d int64) { val := reflect.ValueOf(value) switch value.(type) { case int, int8, int16, int32, int64: d = val.Int() case uint, uint8, uint16, uint32, uint64: d = int64(val.Uint()) default: panic(fmt.Errorf("ToInt64 need numeric not `%T`", value)) } return } // snake string, XxYy to xx_yy func snakeString(s string) string { data := make([]byte, 0, len(s)*2) j := false num := len(s) for i := 0; i < num; i++ { d := s[i] if i > 0 && d >= 'A' && d <= 'Z' && j { data = append(data, '_') } if d != '_' { j = true } data = append(data, d) } return strings.ToLower(string(data[:len(data)])) } // camel string, xx_yy to XxYy func camelString(s string) string { data := make([]byte, 0, len(s)) j := false k := false num := len(s) - 1 for i := 0; i <= num; i++ { d := s[i] if k == false && d >= 'A' && d <= 'Z' { k = true } if d >= 'a' && d <= 'z' && (j || k == false) { d = d - 32 j = false k = true } if k && d == '_' && num > i && s[i+1] >= 'a' && s[i+1] <= 'z' { j = true continue } data = append(data, d) } return string(data[:len(data)]) } type argString []string // get string by index from string slice func (a argString) Get(i int, args ...string) (r string) { if i >= 0 && i < len(a) { r = a[i] } else if len(args) > 0 { r = args[0] } return } type argInt []int // get int by index from int slice func (a argInt) Get(i int, args ...int) (r int) { if i >= 0 && i < len(a) { r = a[i] } if len(args) > 0 { r = args[0] } return } type argAny []interface{} // get interface by index from interface slice func (a argAny) Get(i int, args ...interface{}) (r interface{}) { if i >= 0 && i < len(a) { r = a[i] } if len(args) > 0 { r = args[0] } return } // parse time to string with location func timeParse(dateString, format string) (time.Time, error) { tp, err := time.ParseInLocation(format, dateString, DefaultTimeLoc) return tp, err } // format time string func timeFormat(t time.Time, format string) string { return t.Format(format) } // get pointer indirect type func indirectType(v reflect.Type) reflect.Type { switch v.Kind() { case reflect.Ptr: return indirectType(v.Elem()) default: return v } }