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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License").
* You may not use this file except in compliance with the License.
* A copy of the License is located at
*
* http://aws.amazon.com/apache2.0
*
* or in the "license" file accompanying this file. This file 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.
*/
#pragma once
#include <s2n.h>
#include <stdbool.h>
/* A value which indicates the outcome of a function */
typedef struct {
int __error_signal;
} s2n_result;
/* used to signal a successful function return */
#define S2N_RESULT_OK ((s2n_result) { S2N_SUCCESS })
/* used to signal an error while executing a function */
#define S2N_RESULT_ERROR ((s2n_result) { S2N_FAILURE })
#if defined(__clang__) || defined(__GNUC__)
#define S2N_RESULT_MUST_USE __attribute__((warn_unused_result))
#else
#define S2N_RESULT_MUST_USE
#endif
/* returns true when the result is S2N_RESULT_OK */
S2N_RESULT_MUST_USE bool s2n_result_is_ok(s2n_result result);
/* returns true when the result is S2N_RESULT_ERROR */
S2N_RESULT_MUST_USE bool s2n_result_is_error(s2n_result result);
/* used in function declarations to signal function fallibility */
#define S2N_RESULT S2N_RESULT_MUST_USE s2n_result
/* converts the S2N_RESULT into posix error codes */
#define S2N_RESULT_TO_POSIX( x ) (s2n_result_is_ok(x) ? S2N_SUCCESS : S2N_FAILURE)
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