From dbeb44bc7957f88af7492619da8f4cb4f32c83fa Mon Sep 17 00:00:00 2001
From: Eric Coissac <eric@coissac.eu>
Date: Fri, 31 May 2024 11:07:25 +0200
Subject: [PATCH] Patch a bug in the quality string writing

Former-commit-id: 1a76d58b8648378d10e8b59d05208263e96238c9
---
 pkg/obiseq/biosequence.go | 9 ++++++++-
 1 file changed, 8 insertions(+), 1 deletion(-)

diff --git a/pkg/obiseq/biosequence.go b/pkg/obiseq/biosequence.go
index 5468a3f..88b1a07 100644
--- a/pkg/obiseq/biosequence.go
+++ b/pkg/obiseq/biosequence.go
@@ -276,7 +276,14 @@ func (s *BioSequence) QualitiesString() string {
 	qual := s.Qualities()
 	qual_ascii := make([]byte, len(qual))
 	for i := 0; i < len(qual); i++ {
-		qual_ascii[i] = byte(qual[i] + byte(quality_shift))
+		quality := qual[i]
+		if quality < 0 {
+			quality = 0
+		}
+		if quality > 93 {
+			quality = 93
+		}
+		qual_ascii[i] = quality + quality_shift
 	}
 	return string(qual_ascii)
 }