/* xalloc.h -- malloc with out-of-memory checking

   Copyright (C) 1990-2000, 2003-2004, 2006-2025 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation, either version 3 of the License, or

   (at your option) any later version.

   This program 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 General Public License for more details.

   You should have received a copy of the GNU General Public License

   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */

#ifndef XALLOC_H_

#define XALLOC_H_

/* This file uses _GL_INLINE_HEADER_BEGIN, _GL_INLINE, _Noreturn,

   _GL_ATTRIBUTE_ALLOC_SIZE, _GL_ATTRIBUTE_MALLOC,

   _GL_ATTRIBUTE_RETURNS_NONNULL.  */

#if !_GL_CONFIG_H_INCLUDED

 #error "Please include config.h first."

#endif

#include <stddef.h>

#include <stdlib.h>

#if GNULIB_XALLOC

# include "idx.h"

#endif

_GL_INLINE_HEADER_BEGIN

#ifndef XALLOC_INLINE

# define XALLOC_INLINE _GL_INLINE

#endif

#ifdef __cplusplus

extern "C" {

#endif

#if GNULIB_XALLOC_DIE

/* This function is always triggered when memory is exhausted.

   It must be defined by the application, either explicitly

   or by using gnulib's xalloc-die module.  This is the

   function to call when one wants the program to die because of a

   memory allocation failure.  */

_Noreturn void xalloc_die (void);

#endif /* GNULIB_XALLOC_DIE */

#if GNULIB_XALLOC

void *xmalloc (size_t s)

  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE

  _GL_ATTRIBUTE_ALLOC_SIZE ((1)) _GL_ATTRIBUTE_RETURNS_NONNULL;

void *ximalloc (idx_t s)

  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE

  _GL_ATTRIBUTE_ALLOC_SIZE ((1)) _GL_ATTRIBUTE_RETURNS_NONNULL;

void *xinmalloc (idx_t n, idx_t s)

  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE

  _GL_ATTRIBUTE_ALLOC_SIZE ((1, 2)) _GL_ATTRIBUTE_RETURNS_NONNULL;

void *xzalloc (size_t s)

  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE

  _GL_ATTRIBUTE_ALLOC_SIZE ((1)) _GL_ATTRIBUTE_RETURNS_NONNULL;

void *xizalloc (idx_t s)

  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE

  _GL_ATTRIBUTE_ALLOC_SIZE ((1)) _GL_ATTRIBUTE_RETURNS_NONNULL;

void *xcalloc (size_t n, size_t s)

  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE

  _GL_ATTRIBUTE_ALLOC_SIZE ((1, 2)) _GL_ATTRIBUTE_RETURNS_NONNULL;

void *xicalloc (idx_t n, idx_t s)

  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE

  _GL_ATTRIBUTE_ALLOC_SIZE ((1, 2)) _GL_ATTRIBUTE_RETURNS_NONNULL;

void *xrealloc (void *p, size_t s)

  _GL_ATTRIBUTE_ALLOC_SIZE ((2));

void *xirealloc (void *p, idx_t s)

  _GL_ATTRIBUTE_ALLOC_SIZE ((2)) _GL_ATTRIBUTE_RETURNS_NONNULL;

void *xreallocarray (void *p, size_t n, size_t s)

  _GL_ATTRIBUTE_ALLOC_SIZE ((2, 3));

void *xireallocarray (void *p, idx_t n, idx_t s)

  _GL_ATTRIBUTE_ALLOC_SIZE ((2, 3)) _GL_ATTRIBUTE_RETURNS_NONNULL;

void *x2realloc (void *p, size_t *ps) /* superseded by xpalloc */

  _GL_ATTRIBUTE_RETURNS_NONNULL;

void *x2nrealloc (void *p, size_t *pn, size_t s) /* superseded by xpalloc */

  _GL_ATTRIBUTE_RETURNS_NONNULL;

void *xpalloc (void *pa, idx_t *pn, idx_t n_incr_min, ptrdiff_t n_max, idx_t s)

  _GL_ATTRIBUTE_RETURNS_NONNULL;

void *xmemdup (void const *p, size_t s)

  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE

  _GL_ATTRIBUTE_ALLOC_SIZE ((2)) _GL_ATTRIBUTE_RETURNS_NONNULL;

void *ximemdup (void const *p, idx_t s)

  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE

  _GL_ATTRIBUTE_ALLOC_SIZE ((2)) _GL_ATTRIBUTE_RETURNS_NONNULL;

char *ximemdup0 (void const *p, idx_t s)

  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE

  _GL_ATTRIBUTE_RETURNS_NONNULL;

char *xstrdup (char const *str)

  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE

  _GL_ATTRIBUTE_RETURNS_NONNULL;

/* In the following macros, T must be an elementary or structure/union or

   typedef'ed type, or a pointer to such a type.  To apply one of the

   following macros to a function pointer or array type, you need to typedef

   it first and use the typedef name.  */

/* Allocate an object of type T dynamically, with error checking.  */

/* extern t *XMALLOC (typename t); */

# define XMALLOC(t) ((t *) xmalloc (sizeof (t)))

/* Allocate memory for N elements of type T, with error checking.  */

/* extern t *XNMALLOC (size_t n, typename t); */

# define XNMALLOC(n, t) \

    ((t *) (sizeof (t) == 1 ? xmalloc (n) : xnmalloc (n, sizeof (t))))

/* Allocate an object of type T dynamically, with error checking,

   and zero it.  */

/* extern t *XZALLOC (typename t); */

# define XZALLOC(t) ((t *) xzalloc (sizeof (t)))

/* Allocate memory for N elements of type T, with error checking,

   and zero it.  */

/* extern t *XCALLOC (size_t n, typename t); */

# define XCALLOC(n, t) \

    ((t *) (sizeof (t) == 1 ? xzalloc (n) : xcalloc (n, sizeof (t))))

/* Allocate an array of N objects, each with S bytes of memory,

   dynamically, with error checking.  S must be nonzero.  */

void *xnmalloc (size_t n, size_t s)

  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE

  _GL_ATTRIBUTE_ALLOC_SIZE ((1, 2)) _GL_ATTRIBUTE_RETURNS_NONNULL;

/* FIXME: Deprecate this in favor of xreallocarray?  */

/* Change the size of an allocated block of memory P to an array of N

   objects each of S bytes, with error checking.  S must be nonzero.  */

XALLOC_INLINE void *xnrealloc (void *p, size_t n, size_t s)

  _GL_ATTRIBUTE_ALLOC_SIZE ((2, 3));

XALLOC_INLINE void *

xnrealloc (void *p, size_t n, size_t s)

{

  return xreallocarray (p, n, s);

}

/* Return a pointer to a new buffer of N bytes.  This is like xmalloc,

   except it returns char *.  */

char *xcharalloc (size_t n)

  _GL_ATTRIBUTE_MALLOC _GL_ATTRIBUTE_DEALLOC_FREE

  _GL_ATTRIBUTE_ALLOC_SIZE ((1)) _GL_ATTRIBUTE_RETURNS_NONNULL;

#endif /* GNULIB_XALLOC */

#ifdef __cplusplus

}

#endif

#if GNULIB_XALLOC && defined __cplusplus

/* C++ does not allow conversions from void * to other pointer types

   without a cast.  Use templates to work around the problem when

   possible.  */

template <typename T> inline T *

xrealloc (T *p, size_t s)

{

  return (T *) xrealloc ((void *) p, s);

}

template <typename T> inline T *

xreallocarray (T *p, size_t n, size_t s)

{

  return (T *) xreallocarray ((void *) p, n, s);

}

/* FIXME: Deprecate this in favor of xreallocarray?  */

template <typename T> inline T *

xnrealloc (T *p, size_t n, size_t s)

{

  return xreallocarray (p, n, s);

}

template <typename T> inline T *

x2realloc (T *p, size_t *pn)

{

  return (T *) x2realloc ((void *) p, pn);

}

template <typename T> inline T *

x2nrealloc (T *p, size_t *pn, size_t s)

{

  return (T *) x2nrealloc ((void *) p, pn, s);

}

template <typename T> inline T *

xmemdup (T const *p, size_t s)

{

  return (T *) xmemdup ((void const *) p, s);

}

#endif /* GNULIB_XALLOC && C++ */

_GL_INLINE_HEADER_END

#endif /* !XALLOC_H_ */