status-go/vendor/github.com/mutecomm/go-sqlcipher/zeromem.c

/* LibTomCrypt, modular cryptographic library -- Tom St Denis
 *
 * LibTomCrypt is a library that provides various cryptographic
 * algorithms in a highly modular and flexible manner.
 *
 * The library is free for all purposes without any express
 * guarantee it works.
 *
 * Tom St Denis, tomstdenis@gmail.com, http://libtom.org
 */
#include "tomcrypt.h"
#include <string.h>

/**
   @file zeromem.c
   Zero a block of memory, Tom St Denis
*/

/*
 * Pointer to memset is volatile so that compiler must de-reference
 * the pointer and can't assume that it points to any function in
 * particular (such as memset, which it then might further "optimize")
 */
typedef void *(*memset_t)(void *, int, size_t);

static volatile memset_t memset_func = memset;

/**
   Zero a block of memory
   @param out    The destination of the area to zero
   @param outlen The length of the area to zero (octets)
*/
void zeromem(void *out, size_t outlen)
{
   LTC_ARGCHKVD(out != NULL);
   memset_func((void *)out, 0, outlen);
}

/* $Source$ */
/* $Revision$ */
/* $Date$ */