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Date: Thu, 20 May 2010 09:16:33 +0200
From: Jan Kiszka <jan.kiszka@web.de>
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Subject: [Qemu-devel] [PATCH 2/2] hxtool: Add syntax error detection
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To: qemu-devel <qemu-devel@nongnu.org>

From: Jan Kiszka <jan.kiszka@siemens.com>

Add basic imbalance detection for STEXT/ETEXI.

Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com>
---
 hxtool |   16 +++++++++++++++-
 1 files changed, 15 insertions(+), 1 deletions(-)

diff --git a/hxtool b/hxtool
index 0fdbc64..8f65532 100644
--- a/hxtool
+++ b/hxtool
@@ -19,11 +19,24 @@ hxtoh()
 hxtotexi()
 {
     flag=0
+    line=1
     while read -r str; do
         case "$str" in
             HXCOMM*)
             ;;
-            STEXI*|ETEXI*) flag=$(($flag^1))
+            STEXI*)
+            if test $flag -eq 1 ; then
+                echo "line $line: syntax error: expected ETEXI, found $str" >&2
+                exit 1
+            fi
+            flag=1
+            ;;
+            ETEXI*)
+            if test $flag -ne 1 ; then
+                echo "line $line: syntax error: expected STEXI, found $str" >&2
+                exit 1
+            fi
+            flag=0
             ;;
             DEFHEADING*)
             echo "$(expr "$str" : "DEFHEADING(\(.*\))")"
@@ -32,6 +45,7 @@ hxtotexi()
             test $flag -eq 1 && echo "$str"
             ;;
         esac
+        line=$((line+1))
     done
 }
 
-- 
1.6.0.2