mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-08 22:30:07 +00:00
de0e1b45b0
It syncs with gnulib version a8bac4d49. The main changes are:
- Remove the usage of anonymous union within DYNARRAY_STRUCT.
- Use DYNARRAY_FREE instead of DYNARRAY_NAME (free) so that
Gnulib does not change 'free' to 'rpl_free'.
- Use __nonnull instead of __attribute__ ((nonnull ())).
- Use __attribute_maybe_unused__ instead of
__attribute__ ((unused, nonnull (1))).
- Use of _Noreturn instead of _attribute__ ((noreturn)).
The only difference with gnulib is:
--- glibc
+++ gnulib
@@ -18,6 +18,7 @@
#include <dynarray.h>
#include <stdio.h>
+#include <stdlib.h>
void
__libc_dynarray_at_failure (size_t size, size_t index)
@@ -27,7 +28,6 @@
__snprintf (buf, sizeof (buf), "Fatal glibc error: "
"array index %zu not less than array length %zu\n",
index, size);
- __libc_fatal (buf);
#else
abort ();
#endif
It seems a wrong sync from gnulib (the code is used on loader and
thus it requires __libc_fatal instead of abort).
Checked on x86_64-linux-gnu.
526 lines
18 KiB
C
526 lines
18 KiB
C
/* Type-safe arrays which grow dynamically.
|
|
Copyright (C) 2017-2021 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C 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 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C 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 the GNU C Library; if not, see
|
|
<https://www.gnu.org/licenses/>. */
|
|
|
|
/* Pre-processor macros which act as parameters:
|
|
|
|
DYNARRAY_STRUCT
|
|
The struct tag of dynamic array to be defined.
|
|
DYNARRAY_ELEMENT
|
|
The type name of the element type. Elements are copied
|
|
as if by memcpy, and can change address as the dynamic
|
|
array grows.
|
|
DYNARRAY_PREFIX
|
|
The prefix of the functions which are defined.
|
|
|
|
The following parameters are optional:
|
|
|
|
DYNARRAY_ELEMENT_FREE
|
|
DYNARRAY_ELEMENT_FREE (E) is evaluated to deallocate the
|
|
contents of elements. E is of type DYNARRAY_ELEMENT *.
|
|
DYNARRAY_ELEMENT_INIT
|
|
DYNARRAY_ELEMENT_INIT (E) is evaluated to initialize a new
|
|
element. E is of type DYNARRAY_ELEMENT *.
|
|
If DYNARRAY_ELEMENT_FREE but not DYNARRAY_ELEMENT_INIT is
|
|
defined, new elements are automatically zero-initialized.
|
|
Otherwise, new elements have undefined contents.
|
|
DYNARRAY_INITIAL_SIZE
|
|
The size of the statically allocated array (default:
|
|
at least 2, more elements if they fit into 128 bytes).
|
|
Must be a preprocessor constant. If DYNARRAY_INITIAL_SIZE is 0,
|
|
there is no statically allocated array at, and all non-empty
|
|
arrays are heap-allocated.
|
|
DYNARRAY_FINAL_TYPE
|
|
The name of the type which holds the final array. If not
|
|
defined, is PREFIX##finalize not provided. DYNARRAY_FINAL_TYPE
|
|
must be a struct type, with members of type DYNARRAY_ELEMENT and
|
|
size_t at the start (in this order).
|
|
|
|
These macros are undefined after this header file has been
|
|
included.
|
|
|
|
The following types are provided (their members are private to the
|
|
dynarray implementation):
|
|
|
|
struct DYNARRAY_STRUCT
|
|
|
|
The following functions are provided:
|
|
|
|
void DYNARRAY_PREFIX##init (struct DYNARRAY_STRUCT *);
|
|
void DYNARRAY_PREFIX##free (struct DYNARRAY_STRUCT *);
|
|
bool DYNARRAY_PREFIX##has_failed (const struct DYNARRAY_STRUCT *);
|
|
void DYNARRAY_PREFIX##mark_failed (struct DYNARRAY_STRUCT *);
|
|
size_t DYNARRAY_PREFIX##size (const struct DYNARRAY_STRUCT *);
|
|
DYNARRAY_ELEMENT *DYNARRAY_PREFIX##begin (const struct DYNARRAY_STRUCT *);
|
|
DYNARRAY_ELEMENT *DYNARRAY_PREFIX##end (const struct DYNARRAY_STRUCT *);
|
|
DYNARRAY_ELEMENT *DYNARRAY_PREFIX##at (struct DYNARRAY_STRUCT *, size_t);
|
|
void DYNARRAY_PREFIX##add (struct DYNARRAY_STRUCT *, DYNARRAY_ELEMENT);
|
|
DYNARRAY_ELEMENT *DYNARRAY_PREFIX##emplace (struct DYNARRAY_STRUCT *);
|
|
bool DYNARRAY_PREFIX##resize (struct DYNARRAY_STRUCT *, size_t);
|
|
void DYNARRAY_PREFIX##remove_last (struct DYNARRAY_STRUCT *);
|
|
void DYNARRAY_PREFIX##clear (struct DYNARRAY_STRUCT *);
|
|
|
|
The following functions are provided are provided if the
|
|
prerequisites are met:
|
|
|
|
bool DYNARRAY_PREFIX##finalize (struct DYNARRAY_STRUCT *,
|
|
DYNARRAY_FINAL_TYPE *);
|
|
(if DYNARRAY_FINAL_TYPE is defined)
|
|
DYNARRAY_ELEMENT *DYNARRAY_PREFIX##finalize (struct DYNARRAY_STRUCT *,
|
|
size_t *);
|
|
(if DYNARRAY_FINAL_TYPE is not defined)
|
|
*/
|
|
|
|
#include <malloc/dynarray.h>
|
|
|
|
#include <errno.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#ifndef DYNARRAY_STRUCT
|
|
# error "DYNARRAY_STRUCT must be defined"
|
|
#endif
|
|
|
|
#ifndef DYNARRAY_ELEMENT
|
|
# error "DYNARRAY_ELEMENT must be defined"
|
|
#endif
|
|
|
|
#ifndef DYNARRAY_PREFIX
|
|
# error "DYNARRAY_PREFIX must be defined"
|
|
#endif
|
|
|
|
#ifdef DYNARRAY_INITIAL_SIZE
|
|
# if DYNARRAY_INITIAL_SIZE < 0
|
|
# error "DYNARRAY_INITIAL_SIZE must be non-negative"
|
|
# endif
|
|
# if DYNARRAY_INITIAL_SIZE > 0
|
|
# define DYNARRAY_HAVE_SCRATCH 1
|
|
# else
|
|
# define DYNARRAY_HAVE_SCRATCH 0
|
|
# endif
|
|
#else
|
|
/* Provide a reasonable default which limits the size of
|
|
DYNARRAY_STRUCT. */
|
|
# define DYNARRAY_INITIAL_SIZE \
|
|
(sizeof (DYNARRAY_ELEMENT) > 64 ? 2 : 128 / sizeof (DYNARRAY_ELEMENT))
|
|
# define DYNARRAY_HAVE_SCRATCH 1
|
|
#endif
|
|
|
|
/* Public type definitions. */
|
|
|
|
/* All fields of this struct are private to the implementation. */
|
|
struct DYNARRAY_STRUCT
|
|
{
|
|
union
|
|
{
|
|
struct dynarray_header dynarray_abstract;
|
|
struct
|
|
{
|
|
/* These fields must match struct dynarray_header. */
|
|
size_t used;
|
|
size_t allocated;
|
|
DYNARRAY_ELEMENT *array;
|
|
} dynarray_header;
|
|
} u;
|
|
|
|
#if DYNARRAY_HAVE_SCRATCH
|
|
/* Initial inline allocation. */
|
|
DYNARRAY_ELEMENT scratch[DYNARRAY_INITIAL_SIZE];
|
|
#endif
|
|
};
|
|
|
|
/* Internal use only: Helper macros. */
|
|
|
|
/* Ensure macro-expansion of DYNARRAY_PREFIX. */
|
|
#define DYNARRAY_CONCAT0(prefix, name) prefix##name
|
|
#define DYNARRAY_CONCAT1(prefix, name) DYNARRAY_CONCAT0(prefix, name)
|
|
#define DYNARRAY_NAME(name) DYNARRAY_CONCAT1(DYNARRAY_PREFIX, name)
|
|
|
|
/* Use DYNARRAY_FREE instead of DYNARRAY_NAME (free),
|
|
so that Gnulib does not change 'free' to 'rpl_free'. */
|
|
#define DYNARRAY_FREE DYNARRAY_CONCAT1 (DYNARRAY_NAME (f), ree)
|
|
|
|
/* Address of the scratch buffer if any. */
|
|
#if DYNARRAY_HAVE_SCRATCH
|
|
# define DYNARRAY_SCRATCH(list) (list)->scratch
|
|
#else
|
|
# define DYNARRAY_SCRATCH(list) NULL
|
|
#endif
|
|
|
|
/* Internal use only: Helper functions. */
|
|
|
|
/* Internal function. Call DYNARRAY_ELEMENT_FREE with the array
|
|
elements. Name mangling needed due to the DYNARRAY_ELEMENT_FREE
|
|
macro expansion. */
|
|
static inline void
|
|
DYNARRAY_NAME (free__elements__) (DYNARRAY_ELEMENT *__dynarray_array,
|
|
size_t __dynarray_used)
|
|
{
|
|
#ifdef DYNARRAY_ELEMENT_FREE
|
|
for (size_t __dynarray_i = 0; __dynarray_i < __dynarray_used; ++__dynarray_i)
|
|
DYNARRAY_ELEMENT_FREE (&__dynarray_array[__dynarray_i]);
|
|
#endif /* DYNARRAY_ELEMENT_FREE */
|
|
}
|
|
|
|
/* Internal function. Free the non-scratch array allocation. */
|
|
static inline void
|
|
DYNARRAY_NAME (free__array__) (struct DYNARRAY_STRUCT *list)
|
|
{
|
|
#if DYNARRAY_HAVE_SCRATCH
|
|
if (list->u.dynarray_header.array != list->scratch)
|
|
free (list->u.dynarray_header.array);
|
|
#else
|
|
free (list->u.dynarray_header.array);
|
|
#endif
|
|
}
|
|
|
|
/* Public functions. */
|
|
|
|
/* Initialize a dynamic array object. This must be called before any
|
|
use of the object. */
|
|
__nonnull ((1))
|
|
static void
|
|
DYNARRAY_NAME (init) (struct DYNARRAY_STRUCT *list)
|
|
{
|
|
list->u.dynarray_header.used = 0;
|
|
list->u.dynarray_header.allocated = DYNARRAY_INITIAL_SIZE;
|
|
list->u.dynarray_header.array = DYNARRAY_SCRATCH (list);
|
|
}
|
|
|
|
/* Deallocate the dynamic array and its elements. */
|
|
__attribute_maybe_unused__ __nonnull ((1))
|
|
static void
|
|
DYNARRAY_FREE (struct DYNARRAY_STRUCT *list)
|
|
{
|
|
DYNARRAY_NAME (free__elements__)
|
|
(list->u.dynarray_header.array, list->u.dynarray_header.used);
|
|
DYNARRAY_NAME (free__array__) (list);
|
|
DYNARRAY_NAME (init) (list);
|
|
}
|
|
|
|
/* Return true if the dynamic array is in an error state. */
|
|
__nonnull ((1))
|
|
static inline bool
|
|
DYNARRAY_NAME (has_failed) (const struct DYNARRAY_STRUCT *list)
|
|
{
|
|
return list->u.dynarray_header.allocated == __dynarray_error_marker ();
|
|
}
|
|
|
|
/* Mark the dynamic array as failed. All elements are deallocated as
|
|
a side effect. */
|
|
__nonnull ((1))
|
|
static void
|
|
DYNARRAY_NAME (mark_failed) (struct DYNARRAY_STRUCT *list)
|
|
{
|
|
DYNARRAY_NAME (free__elements__)
|
|
(list->u.dynarray_header.array, list->u.dynarray_header.used);
|
|
DYNARRAY_NAME (free__array__) (list);
|
|
list->u.dynarray_header.array = DYNARRAY_SCRATCH (list);
|
|
list->u.dynarray_header.used = 0;
|
|
list->u.dynarray_header.allocated = __dynarray_error_marker ();
|
|
}
|
|
|
|
/* Return the number of elements which have been added to the dynamic
|
|
array. */
|
|
__nonnull ((1))
|
|
static inline size_t
|
|
DYNARRAY_NAME (size) (const struct DYNARRAY_STRUCT *list)
|
|
{
|
|
return list->u.dynarray_header.used;
|
|
}
|
|
|
|
/* Return a pointer to the array element at INDEX. Terminate the
|
|
process if INDEX is out of bounds. */
|
|
__nonnull ((1))
|
|
static inline DYNARRAY_ELEMENT *
|
|
DYNARRAY_NAME (at) (struct DYNARRAY_STRUCT *list, size_t index)
|
|
{
|
|
if (__glibc_unlikely (index >= DYNARRAY_NAME (size) (list)))
|
|
__libc_dynarray_at_failure (DYNARRAY_NAME (size) (list), index);
|
|
return list->u.dynarray_header.array + index;
|
|
}
|
|
|
|
/* Return a pointer to the first array element, if any. For a
|
|
zero-length array, the pointer can be NULL even though the dynamic
|
|
array has not entered the failure state. */
|
|
__nonnull ((1))
|
|
static inline DYNARRAY_ELEMENT *
|
|
DYNARRAY_NAME (begin) (struct DYNARRAY_STRUCT *list)
|
|
{
|
|
return list->u.dynarray_header.array;
|
|
}
|
|
|
|
/* Return a pointer one element past the last array element. For a
|
|
zero-length array, the pointer can be NULL even though the dynamic
|
|
array has not entered the failure state. */
|
|
__nonnull ((1))
|
|
static inline DYNARRAY_ELEMENT *
|
|
DYNARRAY_NAME (end) (struct DYNARRAY_STRUCT *list)
|
|
{
|
|
return list->u.dynarray_header.array + list->u.dynarray_header.used;
|
|
}
|
|
|
|
/* Internal function. Slow path for the add function below. */
|
|
static void
|
|
DYNARRAY_NAME (add__) (struct DYNARRAY_STRUCT *list, DYNARRAY_ELEMENT item)
|
|
{
|
|
if (__glibc_unlikely
|
|
(!__libc_dynarray_emplace_enlarge (&list->u.dynarray_abstract,
|
|
DYNARRAY_SCRATCH (list),
|
|
sizeof (DYNARRAY_ELEMENT))))
|
|
{
|
|
DYNARRAY_NAME (mark_failed) (list);
|
|
return;
|
|
}
|
|
|
|
/* Copy the new element and increase the array length. */
|
|
list->u.dynarray_header.array[list->u.dynarray_header.used++] = item;
|
|
}
|
|
|
|
/* Add ITEM at the end of the array, enlarging it by one element.
|
|
Mark *LIST as failed if the dynamic array allocation size cannot be
|
|
increased. */
|
|
__nonnull ((1))
|
|
static inline void
|
|
DYNARRAY_NAME (add) (struct DYNARRAY_STRUCT *list, DYNARRAY_ELEMENT item)
|
|
{
|
|
/* Do nothing in case of previous error. */
|
|
if (DYNARRAY_NAME (has_failed) (list))
|
|
return;
|
|
|
|
/* Enlarge the array if necessary. */
|
|
if (__glibc_unlikely (list->u.dynarray_header.used
|
|
== list->u.dynarray_header.allocated))
|
|
{
|
|
DYNARRAY_NAME (add__) (list, item);
|
|
return;
|
|
}
|
|
|
|
/* Copy the new element and increase the array length. */
|
|
list->u.dynarray_header.array[list->u.dynarray_header.used++] = item;
|
|
}
|
|
|
|
/* Internal function. Building block for the emplace functions below.
|
|
Assumes space for one more element in *LIST. */
|
|
static inline DYNARRAY_ELEMENT *
|
|
DYNARRAY_NAME (emplace__tail__) (struct DYNARRAY_STRUCT *list)
|
|
{
|
|
DYNARRAY_ELEMENT *result
|
|
= &list->u.dynarray_header.array[list->u.dynarray_header.used];
|
|
++list->u.dynarray_header.used;
|
|
#if defined (DYNARRAY_ELEMENT_INIT)
|
|
DYNARRAY_ELEMENT_INIT (result);
|
|
#elif defined (DYNARRAY_ELEMENT_FREE)
|
|
memset (result, 0, sizeof (*result));
|
|
#endif
|
|
return result;
|
|
}
|
|
|
|
/* Internal function. Slow path for the emplace function below. */
|
|
static DYNARRAY_ELEMENT *
|
|
DYNARRAY_NAME (emplace__) (struct DYNARRAY_STRUCT *list)
|
|
{
|
|
if (__glibc_unlikely
|
|
(!__libc_dynarray_emplace_enlarge (&list->u.dynarray_abstract,
|
|
DYNARRAY_SCRATCH (list),
|
|
sizeof (DYNARRAY_ELEMENT))))
|
|
{
|
|
DYNARRAY_NAME (mark_failed) (list);
|
|
return NULL;
|
|
}
|
|
return DYNARRAY_NAME (emplace__tail__) (list);
|
|
}
|
|
|
|
/* Allocate a place for a new element in *LIST and return a pointer to
|
|
it. The pointer can be NULL if the dynamic array cannot be
|
|
enlarged due to a memory allocation failure. */
|
|
__attribute_maybe_unused__ __attribute_warn_unused_result__ __nonnull ((1))
|
|
static
|
|
/* Avoid inlining with the larger initialization code. */
|
|
#if !(defined (DYNARRAY_ELEMENT_INIT) || defined (DYNARRAY_ELEMENT_FREE))
|
|
inline
|
|
#endif
|
|
DYNARRAY_ELEMENT *
|
|
DYNARRAY_NAME (emplace) (struct DYNARRAY_STRUCT *list)
|
|
{
|
|
/* Do nothing in case of previous error. */
|
|
if (DYNARRAY_NAME (has_failed) (list))
|
|
return NULL;
|
|
|
|
/* Enlarge the array if necessary. */
|
|
if (__glibc_unlikely (list->u.dynarray_header.used
|
|
== list->u.dynarray_header.allocated))
|
|
return (DYNARRAY_NAME (emplace__) (list));
|
|
return DYNARRAY_NAME (emplace__tail__) (list);
|
|
}
|
|
|
|
/* Change the size of *LIST to SIZE. If SIZE is larger than the
|
|
existing size, new elements are added (which can be initialized).
|
|
Otherwise, the list is truncated, and elements are freed. Return
|
|
false on memory allocation failure (and mark *LIST as failed). */
|
|
__attribute_maybe_unused__ __nonnull ((1))
|
|
static bool
|
|
DYNARRAY_NAME (resize) (struct DYNARRAY_STRUCT *list, size_t size)
|
|
{
|
|
if (size > list->u.dynarray_header.used)
|
|
{
|
|
bool ok;
|
|
#if defined (DYNARRAY_ELEMENT_INIT)
|
|
/* The new elements have to be initialized. */
|
|
size_t old_size = list->u.dynarray_header.used;
|
|
ok = __libc_dynarray_resize (&list->u.dynarray_abstract,
|
|
size, DYNARRAY_SCRATCH (list),
|
|
sizeof (DYNARRAY_ELEMENT));
|
|
if (ok)
|
|
for (size_t i = old_size; i < size; ++i)
|
|
{
|
|
DYNARRAY_ELEMENT_INIT (&list->u.dynarray_header.array[i]);
|
|
}
|
|
#elif defined (DYNARRAY_ELEMENT_FREE)
|
|
/* Zero initialization is needed so that the elements can be
|
|
safely freed. */
|
|
ok = __libc_dynarray_resize_clear
|
|
(&list->u.dynarray_abstract, size,
|
|
DYNARRAY_SCRATCH (list), sizeof (DYNARRAY_ELEMENT));
|
|
#else
|
|
ok = __libc_dynarray_resize (&list->u.dynarray_abstract,
|
|
size, DYNARRAY_SCRATCH (list),
|
|
sizeof (DYNARRAY_ELEMENT));
|
|
#endif
|
|
if (__glibc_unlikely (!ok))
|
|
DYNARRAY_NAME (mark_failed) (list);
|
|
return ok;
|
|
}
|
|
else
|
|
{
|
|
/* The list has shrunk in size. Free the removed elements. */
|
|
DYNARRAY_NAME (free__elements__)
|
|
(list->u.dynarray_header.array + size,
|
|
list->u.dynarray_header.used - size);
|
|
list->u.dynarray_header.used = size;
|
|
return true;
|
|
}
|
|
}
|
|
|
|
/* Remove the last element of LIST if it is present. */
|
|
__attribute_maybe_unused__ __nonnull ((1))
|
|
static void
|
|
DYNARRAY_NAME (remove_last) (struct DYNARRAY_STRUCT *list)
|
|
{
|
|
/* used > 0 implies that the array is the non-failed state. */
|
|
if (list->u.dynarray_header.used > 0)
|
|
{
|
|
size_t new_length = list->u.dynarray_header.used - 1;
|
|
#ifdef DYNARRAY_ELEMENT_FREE
|
|
DYNARRAY_ELEMENT_FREE (&list->u.dynarray_header.array[new_length]);
|
|
#endif
|
|
list->u.dynarray_header.used = new_length;
|
|
}
|
|
}
|
|
|
|
/* Remove all elements from the list. The elements are freed, but the
|
|
list itself is not. */
|
|
__attribute_maybe_unused__ __nonnull ((1))
|
|
static void
|
|
DYNARRAY_NAME (clear) (struct DYNARRAY_STRUCT *list)
|
|
{
|
|
/* free__elements__ does nothing if the list is in the failed
|
|
state. */
|
|
DYNARRAY_NAME (free__elements__)
|
|
(list->u.dynarray_header.array, list->u.dynarray_header.used);
|
|
list->u.dynarray_header.used = 0;
|
|
}
|
|
|
|
#ifdef DYNARRAY_FINAL_TYPE
|
|
/* Transfer the dynamic array to a permanent location at *RESULT.
|
|
Returns true on success on false on allocation failure. In either
|
|
case, *LIST is re-initialized and can be reused. A NULL pointer is
|
|
stored in *RESULT if LIST refers to an empty list. On success, the
|
|
pointer in *RESULT is heap-allocated and must be deallocated using
|
|
free. */
|
|
__attribute_maybe_unused__ __attribute_warn_unused_result__ __nonnull ((1, 2))
|
|
static bool
|
|
DYNARRAY_NAME (finalize) (struct DYNARRAY_STRUCT *list,
|
|
DYNARRAY_FINAL_TYPE *result)
|
|
{
|
|
struct dynarray_finalize_result res;
|
|
if (__libc_dynarray_finalize (&list->u.dynarray_abstract,
|
|
DYNARRAY_SCRATCH (list),
|
|
sizeof (DYNARRAY_ELEMENT), &res))
|
|
{
|
|
/* On success, the result owns all the data. */
|
|
DYNARRAY_NAME (init) (list);
|
|
*result = (DYNARRAY_FINAL_TYPE) { res.array, res.length };
|
|
return true;
|
|
}
|
|
else
|
|
{
|
|
/* On error, we need to free all data. */
|
|
DYNARRAY_FREE (list);
|
|
errno = ENOMEM;
|
|
return false;
|
|
}
|
|
}
|
|
#else /* !DYNARRAY_FINAL_TYPE */
|
|
/* Transfer the dynamic array to a heap-allocated array and return a
|
|
pointer to it. The pointer is NULL if memory allocation fails, or
|
|
if the array is empty, so this function should be used only for
|
|
arrays which are known not be empty (usually because they always
|
|
have a sentinel at the end). If LENGTHP is not NULL, the array
|
|
length is written to *LENGTHP. *LIST is re-initialized and can be
|
|
reused. */
|
|
__attribute_maybe_unused__ __attribute_warn_unused_result__ __nonnull ((1))
|
|
static DYNARRAY_ELEMENT *
|
|
DYNARRAY_NAME (finalize) (struct DYNARRAY_STRUCT *list, size_t *lengthp)
|
|
{
|
|
struct dynarray_finalize_result res;
|
|
if (__libc_dynarray_finalize (&list->u.dynarray_abstract,
|
|
DYNARRAY_SCRATCH (list),
|
|
sizeof (DYNARRAY_ELEMENT), &res))
|
|
{
|
|
/* On success, the result owns all the data. */
|
|
DYNARRAY_NAME (init) (list);
|
|
if (lengthp != NULL)
|
|
*lengthp = res.length;
|
|
return res.array;
|
|
}
|
|
else
|
|
{
|
|
/* On error, we need to free all data. */
|
|
DYNARRAY_FREE (list);
|
|
errno = ENOMEM;
|
|
return NULL;
|
|
}
|
|
}
|
|
#endif /* !DYNARRAY_FINAL_TYPE */
|
|
|
|
/* Undo macro definitions. */
|
|
|
|
#undef DYNARRAY_CONCAT0
|
|
#undef DYNARRAY_CONCAT1
|
|
#undef DYNARRAY_NAME
|
|
#undef DYNARRAY_SCRATCH
|
|
#undef DYNARRAY_HAVE_SCRATCH
|
|
|
|
#undef DYNARRAY_STRUCT
|
|
#undef DYNARRAY_ELEMENT
|
|
#undef DYNARRAY_PREFIX
|
|
#undef DYNARRAY_ELEMENT_FREE
|
|
#undef DYNARRAY_ELEMENT_INIT
|
|
#undef DYNARRAY_INITIAL_SIZE
|
|
#undef DYNARRAY_FINAL_TYPE
|