[libvirt] [PATCHv2 1/2] 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.
---

Notes:
    Version 2:
    Was already ACKed in v1, but:
    * fixed bracing of arguments of the _() macro
    * added src/uti/virbitmap.c to po/POTFILES.in
    (noticed by doing a full build ... )

 po/POTFILES.in       |  1 +
 src/util/virbitmap.c | 18 +++++++++---------
 2 files changed, 10 insertions(+), 9 deletions(-)

diff --git a/po/POTFILES.in b/po/POTFILES.in
index 36d027a..9a83069 100644
--- a/po/POTFILES.in
+++ b/po/POTFILES.in
@@ -147,6 +147,7 @@ src/util/viralloc.c
 src/util/viraudit.c
 src/util/virauth.c
 src/util/virauthconfig.c
+src/util/virbitmap.c
 src/util/vircgroup.c
 src/util/virclosecallbacks.c
 src/util/vircommand.c
diff --git a/src/util/virbitmap.c b/src/util/virbitmap.c
index 47c678e..289a7b9 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