53 lines
1.7 KiB
Diff
53 lines
1.7 KiB
Diff
From 56b44fe637c040187338b51a401d8cc2f1d60612 Mon Sep 17 00:00:00 2001
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From: Peter Krempa <pkrempa@redhat.com>
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Date: Thu, 4 Mar 2021 18:09:42 +0100
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Subject: [PATCH 018/108] virBufferAdd: Ensure that the buffer is initialized
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also when len == 0
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MIME-Version: 1.0
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Content-Type: text/plain; charset=UTF-8
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Content-Transfer-Encoding: 8bit
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There's an optimization in virBufferAdd which returns early when the
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length of the added string is 0 (given that auto-indent is disabled).
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The optimization causes inconsistent behaviour between these two cases:
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virBufferAdd(buf, "", 0); // this doesn't initialize the buffer
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and
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virBufferAdd(buf, "", -1); //this initializes the buffer
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Since using an empty string is used to prime the buffer to an empty
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string it can be confusing. Remove the optimization.
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This fixes such a wrong initialization done in x86FeatureNames.
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Note that our code in many places expects that if no virBuffer APIs are
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used on a buffer object, then NULL should be retured, so we can't always
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prime the buffer to an empty string.
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Signed-off-by: Peter Krempa <pkrempa@redhat.com>
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Reviewed-by: Ján Tomko <jtomko@redhat.com>
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(cherry picked from commit 1553e7256701c725cf87bafa5d738da16f278c3d)
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---
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src/util/virbuffer.c | 2 +-
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1 file changed, 1 insertion(+), 1 deletion(-)
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diff --git a/src/util/virbuffer.c b/src/util/virbuffer.c
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index b78c3debe9..1fd055f77d 100644
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--- a/src/util/virbuffer.c
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+++ b/src/util/virbuffer.c
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@@ -156,7 +156,7 @@ virBufferApplyIndent(virBufferPtr buf)
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void
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virBufferAdd(virBufferPtr buf, const char *str, int len)
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{
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- if (!str || !buf || (len == 0 && buf->indent == 0))
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+ if (!str || !buf)
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return;
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virBufferInitialize(buf);
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--
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2.33.0
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