cutils: Add qemu_strtoull() wrapper

Add wrapper for strtoull() function. Include unit tests.

Signed-off-by: Carlos L. Torres <carlos.torres@rackspace.com>
Message-Id: <e0f0f611c9a81f3c29f451d0b17d755dfab1e90a.1437346779.git.carlos.torres@rackspace.com>
[Use uint64_t in prototype. - Paolo]
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/util/cutils.c b/util/cutils.c
index 7084d6f1ce..67c50e5ae7 100644
--- a/util/cutils.c
+++ b/util/cutils.c
@@ -472,6 +472,29 @@ int qemu_strtoll(const char *nptr, const char **endptr, int base,
 }
 
 /**
+ * Converts ASCII string to an unsigned long long integer.
+ *
+ * See qemu_strtol() documentation for more info.
+ */
+int qemu_strtoull(const char *nptr, const char **endptr, int base,
+                  uint64_t *result)
+{
+    char *p;
+    int err = 0;
+    if (!nptr) {
+        if (endptr) {
+            *endptr = nptr;
+        }
+        err = -EINVAL;
+    } else {
+        errno = 0;
+        *result = strtoull(nptr, &p, base);
+        err = check_strtox_error(endptr, p, errno);
+    }
+    return err;
+}
+
+/**
  * parse_uint:
  *
  * @s: String to parse