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to_float32.go

@@ -0,0 +1,50 @@
+package convx
+
+import (
+	"errors"
+	"strconv"
+)
+
+// interface 转 float32
+func ToFloat32(val interface{}) (f float32, err error) {
+	if v, ok := val.(string); ok {
+		ff, err := strconv.ParseFloat(v, 32)
+		if err != nil {
+			return 0, err
+		}
+		f = float32(ff)
+	} else if v, ok := val.(float32); ok {
+		return v, nil
+	} else if v, ok := val.(float64); ok {
+		return float32(v), nil
+	} else if v, ok := val.(int); ok {
+		return float32(v), nil
+	} else if v, ok := val.(int8); ok {
+		return float32(v), nil
+	} else if v, ok := val.(int16); ok {
+		return float32(v), nil
+	} else if v, ok := val.(int32); ok {
+		return float32(v), nil
+	} else if v, ok := val.(int64); ok {
+		return float32(v), nil
+	} else if v, ok := val.(uint); ok {
+		return float32(v), nil
+	} else if v, ok := val.(uint8); ok {
+		return float32(v), nil
+	} else if v, ok := val.(uint16); ok {
+		return float32(v), nil
+	} else if v, ok := val.(uint32); ok {
+		return float32(v), nil
+	} else if v, ok := val.(uint64); ok {
+		return float32(v), nil
+	} else if v, ok := val.(bool); ok {
+		if v {
+			return 1, nil
+		} else {
+			return 0, nil
+		}
+	} else {
+		return 0, errors.New("类型转换失败")
+	}
+	return
+}