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/** @file
*
* Wireshark - Network traffic analyzer
* By Gerald Combs <gerald@wireshark.org>
* Copyright 1998 Gerald Combs
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#ifndef __WS_RETURN_H__
#define __WS_RETURN_H__
#include <wsutil/wslog.h>
#include <wsutil/wmem/wmem.h>
/*
* These macros can be used as an alternative to ws_assert() to
* assert some condition on function arguments. This must only be used
* to catch programming errors, in situations where an assertion is
* appropriate. And it should only be used if failing the condition
* doesn't necessarily lead to an inconsistent state for the program.
*
* It is possible to set the fatal log level to "critical" to abort
* execution for debugging purposes, if one of these checks fail.
*/
#define ws_warn_zero_len(var) ws_critical("Zero length '%s' passed to %s()", var, __func__)
#define ws_warn_null_ptr(var) ws_critical("Null pointer '%s' passed to %s()", var, __func__)
#define ws_return_str_if_zero(scope, len) \
do { \
if (!(len)) { \
ws_warn_zero_len(#len); \
return wmem_strdup(scope, "(zero length)"); \
} \
} while (0)
#define ws_return_str_if_null(scope, ptr) \
do { \
if (!(ptr)) { \
ws_warn_null_ptr(#ptr); \
return wmem_strdup(scope, "(null pointer)"); \
} \
} while (0)
#define ws_return_val_if_zero(len, val) \
do { \
if (!(len)) { \
ws_warn_zero_len(#len); \
return (val); \
} \
} while (0)
#define ws_return_val_if_null(ptr, val) \
do { \
if (!(ptr)) { \
ws_warn_null_ptr(#ptr); \
return (val); \
} \
} while (0)
#endif /* WS_RETURN_H_ */
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