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authorSergey Poznyakoff <gray@gnu.org.ua>2007-11-18 10:01:26 +0000
committerSergey Poznyakoff <gray@gnu.org.ua>2007-11-18 10:01:26 +0000
commit81b0da52c95168e76f18d70e6282f24ee377ef97 (patch)
tree239f61dbc53fcab5025fe6b3efb2c0f7312c2679 /lib/xmalloc.c
parent307973b31f6c46bcced1cf5b7abab33bcb5d1586 (diff)
downloadmailutils-81b0da52c95168e76f18d70e6282f24ee377ef97.tar.gz
mailutils-81b0da52c95168e76f18d70e6282f24ee377ef97.tar.bz2
Remove
Diffstat (limited to 'lib/xmalloc.c')
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diff --git a/lib/xmalloc.c b/lib/xmalloc.c
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index 687633c25..000000000
--- a/lib/xmalloc.c
+++ /dev/null
@@ -1,241 +0,0 @@
-/* xmalloc.c -- malloc with out of memory checking
-
- Copyright (C) 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998,
- 1999, 2000, 2002, 2003, 2004, 2005 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 2, 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, write to the Free Software Foundation,
- Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
-
-#ifdef HAVE_CONFIG_H
-# include <config.h>
-#endif
-
-#include "xalloc.h"
-
-#include <stdlib.h>
-#include <string.h>
-
-#ifndef SIZE_MAX
-# define SIZE_MAX ((size_t) -1)
-#endif
-
-/* 1 if calloc is known to be compatible with GNU calloc. This
- matters if we are not also using the calloc module, which defines
- HAVE_CALLOC and supports the GNU API even on non-GNU platforms. */
-#if defined HAVE_CALLOC || defined __GLIBC__
-enum { HAVE_GNU_CALLOC = 1 };
-#else
-enum { HAVE_GNU_CALLOC = 0 };
-#endif
-
-/* Allocate an array of N objects, each with S bytes of memory,
- dynamically, with error checking. S must be nonzero. */
-
-static inline void *
-xnmalloc_inline (size_t n, size_t s)
-{
- void *p;
- if (xalloc_oversized (n, s) || (! (p = malloc (n * s)) && n != 0))
- xalloc_die ();
- return p;
-}
-
-void *
-xnmalloc (size_t n, size_t s)
-{
- return xnmalloc_inline (n, s);
-}
-
-/* Allocate N bytes of memory dynamically, with error checking. */
-
-void *
-xmalloc (size_t n)
-{
- return xnmalloc_inline (n, 1);
-}
-
-/* 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. */
-
-static inline void *
-xnrealloc_inline (void *p, size_t n, size_t s)
-{
- if (xalloc_oversized (n, s) || (! (p = realloc (p, n * s)) && n != 0))
- xalloc_die ();
- return p;
-}
-
-void *
-xnrealloc (void *p, size_t n, size_t s)
-{
- return xnrealloc_inline (p, n, s);
-}
-
-/* Change the size of an allocated block of memory P to N bytes,
- with error checking. */
-
-void *
-xrealloc (void *p, size_t n)
-{
- return xnrealloc_inline (p, n, 1);
-}
-
-
-/* If P is null, allocate a block of at least *PN such objects;
- otherwise, reallocate P so that it contains more than *PN objects
- each of S bytes. *PN must be nonzero unless P is null, and S must
- be nonzero. Set *PN to the new number of objects, and return the
- pointer to the new block. *PN is never set to zero, and the
- returned pointer is never null.
-
- Repeated reallocations are guaranteed to make progress, either by
- allocating an initial block with a nonzero size, or by allocating a
- larger block.
-
- In the following implementation, nonzero sizes are doubled so that
- repeated reallocations have O(N log N) overall cost rather than
- O(N**2) cost, but the specification for this function does not
- guarantee that sizes are doubled.
-
- Here is an example of use:
-
- int *p = NULL;
- size_t used = 0;
- size_t allocated = 0;
-
- void
- append_int (int value)
- {
- if (used == allocated)
- p = x2nrealloc (p, &allocated, sizeof *p);
- p[used++] = value;
- }
-
- This causes x2nrealloc to allocate a block of some nonzero size the
- first time it is called.
-
- To have finer-grained control over the initial size, set *PN to a
- nonzero value before calling this function with P == NULL. For
- example:
-
- int *p = NULL;
- size_t used = 0;
- size_t allocated = 0;
- size_t allocated1 = 1000;
-
- void
- append_int (int value)
- {
- if (used == allocated)
- {
- p = x2nrealloc (p, &allocated1, sizeof *p);
- allocated = allocated1;
- }
- p[used++] = value;
- }
-
- */
-
-static inline void *
-x2nrealloc_inline (void *p, size_t *pn, size_t s)
-{
- size_t n = *pn;
-
- if (! p)
- {
- if (! n)
- {
- /* The approximate size to use for initial small allocation
- requests, when the invoking code specifies an old size of
- zero. 64 bytes is the largest "small" request for the
- GNU C library malloc. */
- enum { DEFAULT_MXFAST = 64 };
-
- n = DEFAULT_MXFAST / s;
- n += !n;
- }
- }
- else
- {
- if (SIZE_MAX / 2 / s < n)
- xalloc_die ();
- n *= 2;
- }
-
- *pn = n;
- return xrealloc (p, n * s);
-}
-
-void *
-x2nrealloc (void *p, size_t *pn, size_t s)
-{
- return x2nrealloc_inline (p, pn, s);
-}
-
-/* If P is null, allocate a block of at least *PN bytes; otherwise,
- reallocate P so that it contains more than *PN bytes. *PN must be
- nonzero unless P is null. Set *PN to the new block's size, and
- return the pointer to the new block. *PN is never set to zero, and
- the returned pointer is never null. */
-
-void *
-x2realloc (void *p, size_t *pn)
-{
- return x2nrealloc_inline (p, pn, 1);
-}
-
-/* Allocate S bytes of zeroed memory dynamically, with error checking.
- There's no need for xnzalloc (N, S), since it would be equivalent
- to xcalloc (N, S). */
-
-void *
-xzalloc (size_t s)
-{
- return memset (xmalloc (s), 0, s);
-}
-
-/* Allocate zeroed memory for N elements of S bytes, with error
- checking. S must be nonzero. */
-
-void *
-xcalloc (size_t n, size_t s)
-{
- void *p;
- /* Test for overflow, since some calloc implementations don't have
- proper overflow checks. But omit overflow and size-zero tests if
- HAVE_GNU_CALLOC, since GNU calloc catches overflow and never
- returns NULL if successful. */
- if ((! HAVE_GNU_CALLOC && xalloc_oversized (n, s))
- || (! (p = calloc (n, s)) && (HAVE_GNU_CALLOC || n != 0)))
- xalloc_die ();
- return p;
-}
-
-/* Clone an object P of size S, with error checking. There's no need
- for xnmemdup (P, N, S), since xmemdup (P, N * S) works without any
- need for an arithmetic overflow check. */
-
-void *
-xmemdup (void const *p, size_t s)
-{
- return memcpy (xmalloc (s), p, s);
-}
-
-/* Clone STRING. */
-
-char *
-xstrdup (char const *string)
-{
- return xmemdup (string, strlen (string) + 1);
-}

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