rmemops.h

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/* RLIB - Convenience library for useful things
 * Copyright (C) 2026  Haakon Sporsheim <haakon.sporsheim@gmail.com>
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3.0 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public
 * License along with this library.
 * See the COPYING file at the root of the source repository.
 */
 
#ifndef __R_MEM_OPS_H__
#define __R_MEM_OPS_H__
 
#if !defined(__RLIB_H_INCLUDE_GUARD__) && !defined(RLIB_COMPILATION)
#error "#include <rlib.h> only please."
#endif
 
#include <string.h>
 
R_BEGIN_DECLS
 
static inline int
r_memcmp (rconstpointer a, rconstpointer b, rsize size)
{
  if (R_UNLIKELY (a == NULL)) return -(a != b);
  if (R_UNLIKELY (b == NULL)) return a != b;
  return memcmp (a, b, size);
}
 
static inline rpointer
r_memset (rpointer a, int v, rsize size)
{
  if (a != NULL)
    memset (a, v, size);
  return a;
}
 
#define r_memclear(ptr, size)   r_memset (ptr, 0, size)
 
static inline rpointer
r_memcpy (void * R_ATTR_RESTRICT dst,
    const void * R_ATTR_RESTRICT src, rsize size)
{
  if (dst != NULL && src != NULL)
    return memcpy (dst, src, size);
  return NULL;
}
 
static inline rpointer
r_memmove (rpointer dst, rconstpointer src, rsize size)
{
  if (dst != NULL && src != NULL)
    return memmove (dst, src, size);
  return NULL;
}
 
R_END_DECLS
 
#endif /* __R_MEM_OPS_H__ */