From 98f6b268a556ac27eb0cd6d629b0ee95721f766b Mon Sep 17 00:00:00 2001
From: Martchus <martchus@gmx.net>
Date: Sun, 9 May 2021 12:15:00 +0200
Subject: [PATCH] Fix reading empty ID3v1 fields

---
 id3/id3v1tag.cpp | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/id3/id3v1tag.cpp b/id3/id3v1tag.cpp
index 6344038..74233ab 100644
--- a/id3/id3v1tag.cpp
+++ b/id3/id3v1tag.cpp
@@ -283,10 +283,13 @@ void Id3v1Tag::ensureTextValuesAreProperlyEncoded()
 void Id3v1Tag::readValue(TagValue &value, size_t maxLength, const char *buffer)
 {
     const char *end = buffer + maxLength - 1;
-    while ((*end == 0x0 || *end == ' ') && end > buffer) {
+    while ((*end == 0x0 || *end == ' ') && end >= buffer) {
         --end;
         --maxLength;
     }
+    if (buffer == end) {
+        return;
+    }
     if (maxLength >= 3 && BE::toUInt24(buffer) == 0x00EFBBBF) {
         value.assignData(buffer + 3, maxLength - 3, TagDataType::Text, TagTextEncoding::Utf8);
     } else {