iot init

pkg/tool/conv.go

@@ -0,0 +1,80 @@
+package tool
+
+import (
+	"encoding/json"
+	"strings"
+)
+
+// SnakeString snake string, XxYy to xx_yy , XxYY to xx_y_y
+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))
+}
+
+// CamelString camel string, xx_yy to XxYy
+func CamelString(s string) string {
+	data := make([]byte, 0, len(s))
+	flag, num := true, len(s)-1
+	for i := 0; i <= num; i++ {
+		d := s[i]
+		if d == '_' {
+			flag = true
+			continue
+		} else if flag {
+			if d >= 'a' && d <= 'z' {
+				d = d - 32
+			}
+			flag = false
+		}
+		data = append(data, d)
+	}
+	return string(data)
+}
+
+func FirstLowCamelString(s string) string {
+	data := make([]byte, 0, len(s))
+	flag, num := true, len(s)-1
+	for i := 0; i <= num; i++ {
+		d := s[i]
+		if d == '_' {
+			flag = true
+			continue
+		} else if flag {
+			if d >= 'a' && d <= 'z' {
+				d = d - 32
+			}
+			flag = false
+		}
+		data = append(data, d)
+	}
+	if len(data) > 0 && data[0] >= 65 && data[0] <= 90 {
+		data[0] = data[0] + 32
+	}
+	return string(data)
+}
+
+func MapToStruct(m map[string]interface{}, s interface{}) error {
+	data, err := json.Marshal(m)
+	if err != nil {
+		return err
+	}
+
+	err = json.Unmarshal(data, s)
+	if err != nil {
+		return err
+	}
+
+	return nil
+}