pyocf: move C wrappers to newly added "c" diretory

Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>

tests/functional/pyocf/c/wrappers/ocf_logger_wrappers.c

@@ -0,0 +1,42 @@
+
+/*
+ * Copyright(c) 2012-2021 Intel Corporation
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#include <ocf/ocf_types.h>
+#include <ocf/ocf_logger.h>
+#include <stdarg.h>
+#include "ocf_env.h"
+
+#define LOG_BUFFER_SIZE 4096
+
+struct pyocf_logger_priv {
+	int (*pyocf_log)(void *pyocf_logger, ocf_logger_lvl_t lvl, char *msg);
+};
+
+int pyocf_printf_helper(ocf_logger_t logger, ocf_logger_lvl_t lvl,
+		const char *fmt, va_list args)
+{
+	char *buffer = env_zalloc(LOG_BUFFER_SIZE, ENV_MEM_NORMAL);
+	struct pyocf_logger_priv *priv = ocf_logger_get_priv(logger);
+	int ret;
+
+	if (!buffer) {
+		ret = -ENOMEM;
+		goto out;
+	}
+
+	ret = vsnprintf(buffer, LOG_BUFFER_SIZE, fmt, args);
+	if (ret < 0) {
+		env_free(buffer);
+		goto out;
+	}
+
+	ret = priv->pyocf_log(logger, lvl, buffer);
+
+	env_free(buffer);
+
+out:
+	return ret;
+}