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memzero: automate the selection of the implementation (#196)

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Andrew Kozlik 2019-02-16 16:03:46 +01:00 committed by Pavol Rusnak
parent ad51a5451c
commit b2a0d55fd6
1 changed files with 38 additions and 2 deletions
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40
memzero.c
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@ -1,7 +1,43 @@
#ifndef __STDC_WANT_LIB_EXT1__
#define __STDC_WANT_LIB_EXT1__ 1 // C11's bounds-checking interface.
#endif
#include <string.h>
#include <strings.h>
// taken from https://github.com/jedisct1/libsodium/blob/1647f0d53ae0e370378a9195477e3df0a792408f/src/libsodium/sodium/utils.c#L102-L130
#ifdef _WIN32
#include <Windows.h>
#endif
#ifdef __unix__
#include <strings.h>
#include <sys/param.h>
#endif
// C11's bounds-checking interface.
#if defined(__STDC_LIB_EXT1__)
#define HAVE_MEMSET_S 1
#endif
// GNU C Library version 2.25 or later.
#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 25)
#define HAVE_EXPLICIT_BZERO 1
#endif
// FreeBSD version 11.0 or later.
#if defined(__FreeBSD__) && __FreeBSD_version >= 1100037
#define HAVE_EXPLICIT_BZERO 1
#endif
// OpenBSD version 5.5 or later.
#if defined(__OpenBSD__) && OpenBSD >= 201405
#define HAVE_EXPLICIT_BZERO 1
#endif
// NetBSD version 7.2 or later.
#if defined(__NetBSD__) && __NetBSD_Version__ >= 702000000
#define HAVE_EXPLICIT_MEMSET 1
#endif
// Adapted from https://github.com/jedisct1/libsodium/blob/1647f0d53ae0e370378a9195477e3df0a792408f/src/libsodium/sodium/utils.c#L102-L130
void memzero(void *const pnt, const size_t len)
{