1308e022e1
Some files talk about the MIT license. This code was contributed under CLA and was relicensed to the OpenSSL licence when imported. Reviewed-by: Bernd Edlinger <bernd.edlinger@hotmail.de> (Merged from https://github.com/openssl/openssl/pull/5105)
83 lines
3.1 KiB
C
83 lines
3.1 KiB
C
/*
|
|
* Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.
|
|
* Copyright 2015 Cryptography Research, Inc.
|
|
*
|
|
* Licensed under the OpenSSL license (the "License"). You may not use
|
|
* this file except in compliance with the License. You can obtain a copy
|
|
* in the file LICENSE in the source distribution or at
|
|
* https://www.openssl.org/source/license.html
|
|
*
|
|
* Originally written by Mike Hamburg
|
|
*/
|
|
|
|
#ifndef __DECAF_COMMON_H__
|
|
#define __DECAF_COMMON_H__ 1
|
|
|
|
#include <openssl/e_os2.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* Internal word types.
|
|
*
|
|
* Somewhat tricky. This could be decided separately per platform. However,
|
|
* the structs do need to be all the same size and alignment on a given
|
|
* platform to support dynamic linking, since even if you header was built
|
|
* with eg arch_neon, you might end up linking a library built with arch_arm32.
|
|
*/
|
|
#ifndef DECAF_WORD_BITS
|
|
#if (defined(__ILP64__) || defined(__amd64__) || defined(__x86_64__) || (((__UINT_FAST32_MAX__)>>30)>>30))
|
|
#define DECAF_WORD_BITS 64 /**< The number of bits in a word */
|
|
#else
|
|
#define DECAF_WORD_BITS 32 /**< The number of bits in a word */
|
|
#endif
|
|
#endif
|
|
|
|
#if DECAF_WORD_BITS == 64
|
|
typedef uint64_t decaf_word_t; /**< Word size for internal computations */
|
|
typedef int64_t decaf_sword_t; /**< Signed word size for internal computations */
|
|
typedef uint64_t decaf_bool_t; /**< "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */
|
|
typedef __uint128_t decaf_dword_t; /**< Double-word size for internal computations */
|
|
typedef __int128_t decaf_dsword_t; /**< Signed double-word size for internal computations */
|
|
#elif DECAF_WORD_BITS == 32 /**< The number of bits in a word */
|
|
typedef uint32_t decaf_word_t; /**< Word size for internal computations */
|
|
typedef int32_t decaf_sword_t; /**< Signed word size for internal computations */
|
|
typedef uint32_t decaf_bool_t; /**< "Boolean" type, will be set to all-zero or all-one (i.e. -1u) */
|
|
typedef uint64_t decaf_dword_t; /**< Double-word size for internal computations */
|
|
typedef int64_t decaf_dsword_t; /**< Signed double-word size for internal computations */
|
|
#else
|
|
#error "Only supporting DECAF_WORD_BITS = 32 or 64 for now"
|
|
#endif
|
|
|
|
/** DECAF_TRUE = -1 so that DECAF_TRUE & x = x */
|
|
static const decaf_bool_t DECAF_TRUE = -(decaf_bool_t)1;
|
|
|
|
/** DECAF_FALSE = 0 so that DECAF_FALSE & x = 0 */
|
|
static const decaf_bool_t DECAF_FALSE = 0;
|
|
|
|
/** Another boolean type used to indicate success or failure. */
|
|
typedef enum {
|
|
DECAF_SUCCESS = -1, /**< The operation succeeded. */
|
|
DECAF_FAILURE = 0 /**< The operation failed. */
|
|
} decaf_error_t;
|
|
|
|
|
|
/** Return success if x is true */
|
|
static ossl_inline decaf_error_t
|
|
decaf_succeed_if(decaf_bool_t x) {
|
|
return (decaf_error_t)x;
|
|
}
|
|
|
|
/** Return DECAF_TRUE iff x == DECAF_SUCCESS */
|
|
static ossl_inline decaf_bool_t
|
|
decaf_successful(decaf_error_t e) {
|
|
decaf_dword_t w = ((decaf_word_t)e) ^ ((decaf_word_t)DECAF_SUCCESS);
|
|
return (w-1)>>DECAF_WORD_BITS;
|
|
}
|
|
|
|
#ifdef __cplusplus
|
|
} /* extern "C" */
|
|
#endif
|
|
|
|
#endif /* __DECAF_COMMON_H__ */
|