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diff --git a/src/ext/libcharsetdetect/nspr-emu/prmem.h b/src/ext/libcharsetdetect/nspr-emu/prmem.h
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the Netscape Portable Runtime (NSPR).
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998-2000
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+/*
+** File: prmem.h
+** Description: API to NSPR memory management functions
+**
+*/
+#ifndef prmem_h___
+#define prmem_h___
+
+#include "prtypes.h"
+#include <stdlib.h>
+
+PR_BEGIN_EXTERN_C
+
+/*
+** Thread safe memory allocation.
+**
+** NOTE: pr wraps up malloc, free, calloc, realloc so they are already
+** thread safe (and are not declared here - look in stdlib.h).
+*/
+
+/*
+** PR_Malloc, PR_Calloc, PR_Realloc, and PR_Free have the same signatures
+** as their libc equivalent malloc, calloc, realloc, and free, and have
+** the same semantics.  (Note that the argument type size_t is replaced
+** by PRUint32.)  Memory allocated by PR_Malloc, PR_Calloc, or PR_Realloc
+** must be freed by PR_Free.
+*/
+
+#define PR_Malloc malloc
+#define PR_Calloc calloc
+#define PR_Realloc realloc
+#define PR_Free free
+
+/*
+** The following are some convenience macros defined in terms of
+** PR_Malloc, PR_Calloc, PR_Realloc, and PR_Free.
+*/
+
+/***********************************************************************
+** FUNCTION:	PR_MALLOC()
+** DESCRIPTION:
+**   PR_NEW() allocates an untyped item of size _size from the heap.
+** INPUTS:  _size: size in bytes of item to be allocated
+** OUTPUTS:	untyped pointer to the node allocated
+** RETURN:	pointer to node or error returned from malloc().
+***********************************************************************/
+#define PR_MALLOC(_bytes) (PR_Malloc((_bytes)))
+
+/***********************************************************************
+** FUNCTION:	PR_NEW()
+** DESCRIPTION:
+**   PR_NEW() allocates an item of type _struct from the heap.
+** INPUTS:  _struct: a data type
+** OUTPUTS:	pointer to _struct
+** RETURN:	pointer to _struct or error returns from malloc().
+***********************************************************************/
+#define PR_NEW(_struct) ((_struct *) PR_MALLOC(sizeof(_struct)))
+
+/***********************************************************************
+** FUNCTION:	PR_REALLOC()
+** DESCRIPTION:
+**   PR_REALLOC() re-allocates _ptr bytes from the heap as a _size
+**   untyped item.
+** INPUTS:	_ptr: pointer to node to reallocate
+**          _size: size of node to allocate
+** OUTPUTS:	pointer to node allocated
+** RETURN:	pointer to node allocated
+***********************************************************************/
+#define PR_REALLOC(_ptr, _size) (PR_Realloc((_ptr), (_size)))
+
+/***********************************************************************
+** FUNCTION:	PR_CALLOC()
+** DESCRIPTION:
+**   PR_CALLOC() allocates a _size bytes untyped item from the heap
+**   and sets the allocated memory to all 0x00.
+** INPUTS:	_size: size of node to allocate
+** OUTPUTS:	pointer to node allocated
+** RETURN:	pointer to node allocated
+***********************************************************************/
+#define PR_CALLOC(_size) (PR_Calloc(1, (_size)))
+
+/***********************************************************************
+** FUNCTION:	PR_NEWZAP()
+** DESCRIPTION:
+**   PR_NEWZAP() allocates an item of type _struct from the heap
+**   and sets the allocated memory to all 0x00.
+** INPUTS:	_struct: a data type
+** OUTPUTS:	pointer to _struct
+** RETURN:	pointer to _struct
+***********************************************************************/
+#define PR_NEWZAP(_struct) ((_struct*)PR_Calloc(1, sizeof(_struct)))
+
+/***********************************************************************
+** FUNCTION:	PR_DELETE()
+** DESCRIPTION:
+**   PR_DELETE() unallocates an object previosly allocated via PR_NEW()
+**   or PR_NEWZAP() to the heap.
+** INPUTS:	pointer to previously allocated object
+** OUTPUTS:	the referenced object is returned to the heap
+** RETURN:	void
+***********************************************************************/
+#define PR_DELETE(_ptr) { PR_Free(_ptr); (_ptr) = NULL; }
+
+/***********************************************************************
+** FUNCTION:	PR_FREEIF()
+** DESCRIPTION:
+**   PR_FREEIF() conditionally unallocates an object previously allocated
+**   vial PR_NEW() or PR_NEWZAP(). If the pointer to the object is
+**   equal to zero (0), the object is not released.
+** INPUTS:	pointer to previously allocated object
+** OUTPUTS:	the referenced object is conditionally returned to the heap
+** RETURN:	void
+***********************************************************************/
+#define PR_FREEIF(_ptr)	if (_ptr) PR_DELETE(_ptr)
+
+PR_END_EXTERN_C
+
+#endif /* prmem_h___ */