/* libxml2 - Library for parsing XML documents
 * Copyright (C) 2006-2019 Free Software Foundation, Inc.
 *
 * This file is not part of the GNU gettext program, but is used with
 * GNU gettext.
 *
 * The original copyright notice is as follows:
 */

/*
 * Copyright (C) 1998-2012 Daniel Veillard.  All Rights Reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is fur-
 * nished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FIT-
 * NESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * Author: Daniel Veillard
 */

/*
 * Summary: interface for the memory allocator
 * Description: provides interfaces for the memory allocator,
 *              including debugging capabilities.
 */

#ifndef __DEBUG_MEMORY_ALLOC__
#define __DEBUG_MEMORY_ALLOC__

#include <stdio.h>
#include <libxml/xmlversion.h>

/**
 * DEBUG_MEMORY:
 *
 * DEBUG_MEMORY replaces the allocator with a collect and debug
 * shell to the libc allocator.
 * DEBUG_MEMORY should only be activated when debugging
 * libxml i.e. if libxml has been configured with --with-debug-mem too.
 */
/* #define DEBUG_MEMORY_FREED */
/* #define DEBUG_MEMORY_LOCATION */

#ifdef DEBUG
#ifndef DEBUG_MEMORY
#define DEBUG_MEMORY
#endif
#endif

/**
 * DEBUG_MEMORY_LOCATION:
 *
 * DEBUG_MEMORY_LOCATION should be activated only when debugging
 * libxml i.e. if libxml has been configured with --with-debug-mem too.
 */
#ifdef DEBUG_MEMORY_LOCATION
#endif

#ifdef __cplusplus
extern "C" {
#endif

/*
 * The XML memory wrapper support 4 basic overloadable functions.
 */
/**
 * xmlFreeFunc:
 * @mem: an already allocated block of memory
 *
 * Signature for a free() implementation.
 */
typedef void (XMLCALL *xmlFreeFunc)(void *mem);
/**
 * xmlMallocFunc:
 * @size:  the size requested in bytes
 *
 * Signature for a malloc() implementation.
 *
 * Returns a pointer to the newly allocated block or NULL in case of error.
 */
typedef void *(LIBXML_ATTR_ALLOC_SIZE(1) XMLCALL *xmlMallocFunc)(size_t size);

/**
 * xmlReallocFunc:
 * @mem: an already allocated block of memory
 * @size:  the new size requested in bytes
 *
 * Signature for a realloc() implementation.
 *
 * Returns a pointer to the newly reallocated block or NULL in case of error.
 */
typedef void *(XMLCALL *xmlReallocFunc)(void *mem, size_t size);

/**
 * xmlStrdupFunc:
 * @str: a zero terminated string
 *
 * Signature for an strdup() implementation.
 *
 * Returns the copy of the string or NULL in case of error.
 */
typedef char *(XMLCALL *xmlStrdupFunc)(const char *str);

/*
 * The 4 interfaces used for all memory handling within libxml.
LIBXML_DLL_IMPORT xmlFreeFunc xmlFree;
LIBXML_DLL_IMPORT xmlMallocFunc xmlMalloc;
LIBXML_DLL_IMPORT xmlMallocFunc xmlMallocAtomic;
LIBXML_DLL_IMPORT xmlReallocFunc xmlRealloc;
LIBXML_DLL_IMPORT xmlStrdupFunc xmlMemStrdup;
 */

/*
 * The way to overload the existing functions.
 * The xmlGc function have an extra entry for atomic block
 * allocations useful for garbage collected memory allocators
 */
XMLPUBFUN int XMLCALL
	xmlMemSetup	(xmlFreeFunc freeFunc,
			 xmlMallocFunc mallocFunc,
			 xmlReallocFunc reallocFunc,
			 xmlStrdupFunc strdupFunc);
XMLPUBFUN int XMLCALL
	xmlMemGet	(xmlFreeFunc *freeFunc,
			 xmlMallocFunc *mallocFunc,
			 xmlReallocFunc *reallocFunc,
			 xmlStrdupFunc *strdupFunc);
XMLPUBFUN int XMLCALL
	xmlGcMemSetup	(xmlFreeFunc freeFunc,
			 xmlMallocFunc mallocFunc,
			 xmlMallocFunc mallocAtomicFunc,
			 xmlReallocFunc reallocFunc,
			 xmlStrdupFunc strdupFunc);
XMLPUBFUN int XMLCALL
	xmlGcMemGet	(xmlFreeFunc *freeFunc,
			 xmlMallocFunc *mallocFunc,
			 xmlMallocFunc *mallocAtomicFunc,
			 xmlReallocFunc *reallocFunc,
			 xmlStrdupFunc *strdupFunc);

/*
 * Initialization of the memory layer.
 */
XMLPUBFUN int XMLCALL
	xmlInitMemory	(void);

/*
 * Cleanup of the memory layer.
 */
XMLPUBFUN void XMLCALL
                xmlCleanupMemory        (void);
/*
 * These are specific to the XML debug memory wrapper.
 */
XMLPUBFUN int XMLCALL
	xmlMemUsed	(void);
XMLPUBFUN int XMLCALL
	xmlMemBlocks	(void);
XMLPUBFUN void XMLCALL
	xmlMemDisplay	(FILE *fp);
XMLPUBFUN void XMLCALL
	xmlMemDisplayLast(FILE *fp, long nbBytes);
XMLPUBFUN void XMLCALL
	xmlMemShow	(FILE *fp, int nr);
XMLPUBFUN void XMLCALL
	xmlMemoryDump	(void);
XMLPUBFUN void * XMLCALL
	xmlMemMalloc	(size_t size) LIBXML_ATTR_ALLOC_SIZE(1);
XMLPUBFUN void * XMLCALL
	xmlMemRealloc	(void *ptr,size_t size);
XMLPUBFUN void XMLCALL
	xmlMemFree	(void *ptr);
XMLPUBFUN char * XMLCALL
	xmlMemoryStrdup	(const char *str);
XMLPUBFUN void * XMLCALL
	xmlMallocLoc	(size_t size, const char *file, int line) LIBXML_ATTR_ALLOC_SIZE(1);
XMLPUBFUN void * XMLCALL
	xmlReallocLoc	(void *ptr, size_t size, const char *file, int line);
XMLPUBFUN void * XMLCALL
	xmlMallocAtomicLoc (size_t size, const char *file, int line) LIBXML_ATTR_ALLOC_SIZE(1);
XMLPUBFUN char * XMLCALL
	xmlMemStrdupLoc	(const char *str, const char *file, int line);


#ifdef DEBUG_MEMORY_LOCATION
/**
 * xmlMalloc:
 * @size:  number of bytes to allocate
 *
 * Wrapper for the malloc() function used in the XML library.
 *
 * Returns the pointer to the allocated area or NULL in case of error.
 */
#define xmlMalloc(size) xmlMallocLoc((size), __FILE__, __LINE__)
/**
 * xmlMallocAtomic:
 * @size:  number of bytes to allocate
 *
 * Wrapper for the malloc() function used in the XML library for allocation
 * of block not containing pointers to other areas.
 *
 * Returns the pointer to the allocated area or NULL in case of error.
 */
#define xmlMallocAtomic(size) xmlMallocAtomicLoc((size), __FILE__, __LINE__)
/**
 * xmlRealloc:
 * @ptr:  pointer to the existing allocated area
 * @size:  number of bytes to allocate
 *
 * Wrapper for the realloc() function used in the XML library.
 *
 * Returns the pointer to the allocated area or NULL in case of error.
 */
#define xmlRealloc(ptr, size) xmlReallocLoc((ptr), (size), __FILE__, __LINE__)
/**
 * xmlMemStrdup:
 * @str:  pointer to the existing string
 *
 * Wrapper for the strdup() function, xmlStrdup() is usually preferred.
 *
 * Returns the pointer to the allocated area or NULL in case of error.
 */
#define xmlMemStrdup(str) xmlMemStrdupLoc((str), __FILE__, __LINE__)

#endif /* DEBUG_MEMORY_LOCATION */

#ifdef __cplusplus
}
#endif /* __cplusplus */

#ifndef __XML_GLOBALS_H
#ifndef __XML_THREADS_H__
#include <libxml/threads.h>
#include <libxml/globals.h>
#endif
#endif

#endif  /* __DEBUG_MEMORY_ALLOC__ */

