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From c8fc71708382f37cfc7437b15f58e3d5ab1f2cb1 Mon Sep 17 00:00:00 2001
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Message-Id: <c8fc71708382f37cfc7437b15f58e3d5ab1f2cb1@dist-git>
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From: =?UTF-8?q?J=C3=A1n=20Tomko?= <jtomko@redhat.com>
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Date: Fri, 9 Jun 2017 12:48:51 +0200
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Subject: [PATCH] Use a separate buffer for <input> subelements
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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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Instead of figuring out upfront whether <input> will be a single
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or a pair element, format the subelements into a separate buffer
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and close <input/> early if this buffer is empty.
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(cherry picked from commit 51219e11b8c57c7a9755eedd72986269b78ccfb7)
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Signed-off-by: Ján Tomko <jtomko@redhat.com>
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https://bugzilla.redhat.com/show_bug.cgi?id=1283251
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Signed-off-by: Jiri Denemark <jdenemar@redhat.com>
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---
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 src/conf/domain_conf.c | 21 +++++++++++----------
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 1 file changed, 11 insertions(+), 10 deletions(-)
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diff --git a/src/conf/domain_conf.c b/src/conf/domain_conf.c
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index b473ce6b1e..4228cad610 100644
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--- a/src/conf/domain_conf.c
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+++ b/src/conf/domain_conf.c
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@@ -23152,6 +23152,7 @@ virDomainInputDefFormat(virBufferPtr buf,
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 {
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     const char *type = virDomainInputTypeToString(def->type);
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     const char *bus = virDomainInputBusTypeToString(def->bus);
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+    virBuffer childbuf = VIR_BUFFER_INITIALIZER;
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     /* don't format keyboard into migratable XML for backward compatibility */
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     if (flags & VIR_DOMAIN_DEF_FORMAT_MIGRATABLE &&
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@@ -23174,17 +23175,17 @@ virDomainInputDefFormat(virBufferPtr buf,
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     virBufferAsprintf(buf, "
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                       type, bus);
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-    if (virDomainDeviceInfoNeedsFormat(&def->info, flags) ||
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-        def->type == VIR_DOMAIN_INPUT_TYPE_PASSTHROUGH) {
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-        virBufferAddLit(buf, ">\n");
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-        virBufferAdjustIndent(buf, 2);
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-        virBufferEscapeString(buf, "<source evdev='%s'/>\n", def->source.evdev);
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-        if (virDomainDeviceInfoFormat(buf, &def->info, flags) < 0)
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-            return -1;
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-        virBufferAdjustIndent(buf, -2);
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-        virBufferAddLit(buf, "</input>\n");
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-    } else {
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+    virBufferAdjustIndent(&childbuf, virBufferGetIndent(buf, false) + 2);
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+    virBufferEscapeString(&childbuf, "<source evdev='%s'/>\n", def->source.evdev);
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+    if (virDomainDeviceInfoFormat(&childbuf, &def->info, flags) < 0)
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+        return -1;
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+
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+    if (!virBufferUse(&childbuf)) {
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         virBufferAddLit(buf, "/>\n");
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+    } else {
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+        virBufferAddLit(buf, ">\n");
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+        virBufferAddBuffer(buf, &childbuf);
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+        virBufferAddLit(buf, "</input>\n");
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     }
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     return 0;
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-- 
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2.13.1
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