stdio: New module, initially to provide working [v]snprintf() on Windows.

[sliver-openvswitch.git] / lib / stdio.c

diff --git a/lib/stdio.c b/lib/stdio.c
new file mode 100644 (file)
index 0000000..49a5078
--- /dev/null
+++ b/lib/stdio.c
@@ -0,0 +1,48 @@
+/*
+ * Copyright (c) 2013 Nicira, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at:
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include <config.h>
+
+#include <stdio.h>
+
+#ifdef _WIN32
+#undef snprintf
+#undef vsnprintf
+
+int
+ovs_snprintf(char *s, size_t n, const char *format, ... )
+{
+    va_list args;
+    int len;
+
+    va_start(args, format);
+    len = ovs_vsnprintf(s, n, format, args);
+    va_end(args);
+
+    return len;
+}
+
+int
+ovs_vsnprintf(char *s, size_t n, const char *format, va_list args)
+{
+    int needed = _vscprintf(format, args);
+    if (s && n) {
+        vsnprintf(s, n, format, args);
+        s[n - 1] = '\0';
+    }
+    return needed;
+}
+#endif  /* _WIN32 */