[libvirt] 2 patches: dead increment and 4 useless (always-false) disjuncts

[Jim Meyering]

>From 74f57af2010f9cbe2315d625c6502a0b259e6802 Mon Sep 17 00:00:00 2001
From: Jim Meyering <meyering at redhat.com>
Date: Mon, 7 Sep 2009 10:03:22 +0200
Subject: [PATCH 1/2] xm_internal.c: remove dead increment of "data"

* src/xm_internal.c (xenXMDomainConfigParse): Don't increment it.
---
 src/xm_internal.c |    1 -
 1 files changed, 0 insertions(+), 1 deletions(-)

diff --git a/src/xm_internal.c b/src/xm_internal.c
index f206c8c..18613d4 100644
--- a/src/xm_internal.c
+++ b/src/xm_internal.c
@@ -1314,7 +1314,6 @@ xenXMDomainConfigParse(virConnectPtr conn, virConfPtr conf) {

                 if (!(data = strchr(key, '=')) || (data[0] == '\0'))
                     break;
-                data++;

                 if (graphics->type == VIR_DOMAIN_GRAPHICS_TYPE_VNC) {
                     if (STRPREFIX(key, "vncunused=")) {
--
1.6.4.2.419.gab238


>From d4db2dfaafbf827d1c8b8626a3dbdaa9f371e479 Mon Sep 17 00:00:00 2001
From: Jim Meyering <meyering at redhat.com>
Date: Mon, 7 Sep 2009 10:09:20 +0200
Subject: [PATCH 2/2] xm_internal.c: remove four useless comparisons after strchr

* src/xm_internal.c (xenXMDomainConfigParse): After t=strchr...
don't test *t; it's known.  This was *not* detected by clang,
but I spotted it since once instance was in the vicinity of the
dead increment of "data".
---
 src/xm_internal.c |    8 ++++----
 1 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/src/xm_internal.c b/src/xm_internal.c
index 18613d4..e7f6a55 100644
--- a/src/xm_internal.c
+++ b/src/xm_internal.c
@@ -862,7 +862,7 @@ xenXMDomainConfigParse(virConnectPtr conn, virConfPtr conf) {
              */

             /* Extract the source file path*/
-            if (!(offset = strchr(head, ',')) || offset[0] == '\0')
+            if (!(offset = strchr(head, ',')))
                 goto skipdisk;
             if ((offset - head) >= (PATH_MAX-1))
                 goto skipdisk;
@@ -882,7 +882,7 @@ xenXMDomainConfigParse(virConnectPtr conn, virConfPtr conf) {
                 head = head + 6;

             /* Extract the dest device name */
-            if (!(offset = strchr(head, ',')) || offset[0] == '\0')
+            if (!(offset = strchr(head, ',')))
                 goto skipdisk;
             if (VIR_ALLOC_N(disk->dst, (offset - head) + 1) < 0)
                 goto no_memory;
@@ -1018,7 +1018,7 @@ xenXMDomainConfigParse(virConnectPtr conn, virConfPtr conf) {
                 char *data;
                 char *nextkey = strchr(key, ',');

-                if (!(data = strchr(key, '=')) || (data[0] == '\0'))
+                if (!(data = strchr(key, '=')))
                     goto skipnic;
                 data++;

@@ -1312,7 +1312,7 @@ xenXMDomainConfigParse(virConnectPtr conn, virConfPtr conf) {
                     nextkey++;
                 }

-                if (!(data = strchr(key, '=')) || (data[0] == '\0'))
+                if (!(data = strchr(key, '=')))
                     break;

                 if (graphics->type == VIR_DOMAIN_GRAPHICS_TYPE_VNC) {
--
1.6.4.2.419.gab238