From: Lasse Collin <lasse.collin@tukaani.org>
Date: Mon, 12 Feb 2024 15:09:10 +0000 (+0200)
Subject: liblzma: Clarify a comment.
X-Git-Tag: v5.5.2beta~17
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=e290a72d6dee71faf3a90c9678b2f730083666a7;p=thirdparty%2Fxz.git

liblzma: Clarify a comment.
---

diff --git a/src/liblzma/lzma/lzma_decoder.c b/src/liblzma/lzma/lzma_decoder.c
index f7323061..6c9cbe22 100644
--- a/src/liblzma/lzma/lzma_decoder.c
+++ b/src/liblzma/lzma/lzma_decoder.c
@@ -338,9 +338,12 @@ lzma_decode(void *coder_ptr, lzma_dict *restrict dictptr,
 		// Non-resumable Mode (fast) //
 		///////////////////////////////
 
-		// If there is not enough room for another LZMA symbol
-		// go to Resumable mode.
-		if (unlikely(!rc_is_fast_allowed() || dict.pos == dict.limit))
+		// Go to Resumable mode (1) if there is not enough input to
+		// safely decode any possible LZMA symbol or (2) if the
+		// dictionary is full, which may need special checks that
+		// are only done in the Resumable mode.
+		if (unlikely(!rc_is_fast_allowed()
+				|| dict.pos == dict.limit))
 			goto slow;
 
 		// Decode the first bit from the next LZMA symbol.