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/*
* ck - C11 Annex K wrappers (selected functions; not complete)
*
* ck is also an abbreviation for "check".
* These are validating, checking functions.
*
* Copyright(c) 2016,2021 Glenn Strauss gstrauss()gluelogic.com All rights reserved
* License: BSD 3-clause (same as lighttpd)
*/
#ifndef INCLUDED_CK_H
#define INCLUDED_CK_H
#ifndef __STDC_WANT_LIB_EXT1__ /*(enable C11 Annex K ext1 *_s functions)*/
#define __STDC_WANT_LIB_EXT1__ 1
#endif
#include "first.h"
#ifdef __FreeBSD__
#ifndef _RSIZE_T_DEFINED /* expecting __EXT1_VISIBLE 1 and _RSIZE_T_DEFINED */
#define _RSIZE_T_DEFINED
typedef size_t rsize_t;
#endif
#include <errno.h>
#endif
__BEGIN_DECLS
#ifndef RSIZE_MAX
#define RSIZE_MAX (SIZE_MAX >> 1)
typedef size_t rsize_t;
typedef int errno_t;
#endif
errno_t ck_getenv_s (size_t * restrict len, char * restrict value, rsize_t maxsize, const char * restrict name);
/*(ck_memclear_s() is not from C11 Annex K
* ck_memclear_s() is similar to memset_s() using constant byte 0 for fill)*/
errno_t ck_memclear_s (void *s, rsize_t smax, rsize_t n);
/*(ck_memzero() is not from C11 Annex K
* ck_memzero() is a convenience wrapper around ck_memclear_s())*/
static inline errno_t ck_memzero(void *s, rsize_t n);
static inline errno_t ck_memzero(void *s, rsize_t n) {
return ck_memclear_s(s, n, n);
}
errno_t ck_strerror_s (char *s, rsize_t maxsize, errno_t errnum);
/*(ck_memeq_const_time() is not from C11 Annex K)
* constant time memory compare for equality
* rounds to next multiple of 64 to avoid potentially leaking exact
* string lengths when subject to high precision timing attacks */
__attribute_nonnull__
int ck_memeq_const_time (const void *a, size_t alen, const void *b, size_t blen);
/*(ck_memeq_const_time_fixed_len() is not from C11 Annex K)
* constant time memory compare for equality for fixed len (e.g. digests)
* (padding not necessary for digests, which have fixed, defined lengths) */
__attribute_nonnull__
int ck_memeq_const_time_fixed_len (const void *a, const void *b, size_t len);
/*(ck_bt() is not from C11 Annex K)
* ck_bt() prints backtrace to stderr */
__attribute_cold__
__attribute_nonnull__
void ck_bt(const char *filename, unsigned int line, const char *msg);
/*(ck_bt_abort() is not from C11 Annex K)
* ck_bt_abort() prints backtrace to stderr and calls abort() */
__attribute_cold__
__attribute_nonnull__
__attribute_noreturn__
void ck_bt_abort(const char *filename, unsigned int line, const char *msg);
/*(ck_assert() and ck_assert_failed() are not from C11 Annex K)
* ck_assert() executes a runtime assertion test or aborts
* ck_assert() *is not* optimized away if defined(NDEBUG)
* (unlike standard assert(), which *is* optimized away if defined(NDEBUG)) */
__attribute_cold__
__attribute_nonnull__
__attribute_noreturn__
void ck_assert_failed(const char *filename, unsigned int line, const char *msg);
#define ck_assert(x) \
do { if (!(x)) ck_assert_failed(__FILE__, __LINE__, #x); } while (0)
__END_DECLS
#endif