fix special case of zero length read

bollhals · bollhals · commit 2adff6d64591 · 2020-06-02T22:41:14.000+02:00
diff --git a/projects/RabbitMQ.Client/client/impl/WireFormatting.cs b/projects/RabbitMQ.Client/client/impl/WireFormatting.cs
@@ -189,6 +189,11 @@ public static byte[] ReadLongstr(ReadOnlySpan<byte> span)
         public static unsafe string ReadShortstr(ReadOnlySpan<byte> span, out int bytesRead)
         {
             int byteCount = span[0];
+            if (byteCount == 0)
+            {
+                bytesRead = 1;
+                return string.Empty;
+            }
             if (span.Length >= byteCount + 1)
             {
                 bytesRead = 1 + byteCount;

Original file line number	Diff line number	Diff line change
`@@ -189,6 +189,11 @@ public static byte[] ReadLongstr(ReadOnlySpan<byte> span)`
`189`	`189`	`public static unsafe string ReadShortstr(ReadOnlySpan<byte> span, out int bytesRead)`
`190`	`190`	`{`
`191`	`191`	`int byteCount = span[0];`
	`192`	`+ if (byteCount == 0)`
	`193`	`+ {`
	`194`	`+ bytesRead = 1;`
	`195`	`+ return string.Empty;`
	`196`	`+ }`
`192`	`197`	`if (span.Length >= byteCount + 1)`
`193`	`198`	`{`
`194`	`199`	`bytesRead = 1 + byteCount;`