From 2d8b5b1885b3d5cd14c974df61a3d0d757efd7bd Mon Sep 17 00:00:00 2001
From: xuri <xuri.me@gmail.com>
Date: Tue, 28 Sep 2021 22:02:31 +0800
Subject: This closes #1027 and closes #1028

* Fix build-in scientific number format failed
* An error will be returned if given an invalid custom number format when creating a new style
---
 styles.go | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

(limited to 'styles.go')

diff --git a/styles.go b/styles.go
index e4f3a27..0ae9e51 100644
--- a/styles.go
+++ b/styles.go
@@ -930,7 +930,7 @@ func formatToE(v string, format string) string {
 	if err != nil {
 		return v
 	}
-	return fmt.Sprintf("%.e", f)
+	return fmt.Sprintf("%.2E", f)
 }
 
 // parseTime provides a function to returns a string parsed using time.Time.
@@ -1115,6 +1115,9 @@ func parseFormatStyleSet(style interface{}) (*Style, error) {
 			return &fs, ErrFontSize
 		}
 	}
+	if fs.CustomNumFmt != nil && len(*fs.CustomNumFmt) == 0 {
+		err = ErrCustomNumFmt
+	}
 	return &fs, err
 }
 
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