[libvirt] [PATCH] virBitmapParse: Fix behavior in case of error

[Peter Krempa]

Re-arrange the code so that the returned bitmap is always initialized to
NULL even on early failures and return an error message as some callers
are already expecting it.
---
 src/util/virbitmap.c | 18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

diff --git a/src/util/virbitmap.c b/src/util/virbitmap.c
index 47c678e..5d0655c 100644
--- a/src/util/virbitmap.c
+++ b/src/util/virbitmap.c
@@ -298,23 +298,21 @@ virBitmapParse(const char *str,
                size_t bitmapSize)
 {
     bool neg = false;
-    const char *cur;
+    const char *cur = str;
     char *tmp;
     size_t i;
     int start, last;

-    if (!str)
+    if (!(*bitmap = virBitmapNew(bitmapSize)))
         return -1;

-    cur = str;
-    virSkipSpaces(&cur);
+    if (!str)
+        goto error;

-    if (*cur == 0)
-        return -1;
+    virSkipSpaces(&cur);

-    *bitmap = virBitmapNew(bitmapSize);
-    if (!*bitmap)
-        return -1;
+    if (*cur == '\0')
+        goto error;

     while (*cur != 0 && *cur != terminator) {
         /*
@@ -384,6 +382,8 @@ virBitmapParse(const char *str,
     return virBitmapCountBits(*bitmap);

 error:
+    virReportError(VIR_ERR_INTERNAL_ERROR,
+                   _("Failed to parse bitmap '%s'", str));
     virBitmapFree(*bitmap);
     *bitmap = NULL;
     return -1;
-- 
1.8.3.2