#include "bn.h"

#ifndef WITH_LIBCRYPTO
//FIXME Not checked on threadsafety yet; after checking please remove this line
/* crypto/mem.c */
/* Copyright (C) 1995-1998 Eric Young (eay@cryptsoft.com)
 * All rights reserved.
 *
 * This package is an SSL implementation written
 * by Eric Young (eay@cryptsoft.com).
 * The implementation was written so as to conform with Netscapes SSL.
 *
 * This library is free for commercial and non-commercial use as long as
 * the following conditions are aheared to.  The following conditions
 * apply to all code found in this distribution, be it the RC4, RSA,
 * lhash, DES, etc., code; not just the SSL code.  The SSL documentation
 * included with this distribution is covered by the same copyright terms
 * except that the holder is Tim Hudson (tjh@cryptsoft.com).
 *
 * Copyright remains Eric Young's, and as such any Copyright notices in
 * the code are not to be removed.
 * If this package is used in a product, Eric Young should be given attribution
 * as the author of the parts of the library used.
 * This can be in the form of a textual message at program startup or
 * in documentation (online or textual) provided with the package.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *    "This product includes cryptographic software written by
 *     Eric Young (eay@cryptsoft.com)"
 *    The word 'cryptographic' can be left out if the rouines from the library
 *    being used are not cryptographic related :-).
 * 4. If you include any Windows specific code (or a derivative thereof) from
 *    the apps directory (application code) you must include an acknowledgement:
 *    "This product includes software written by Tim Hudson (tjh@cryptsoft.com)"
 *
 * THIS SOFTWARE IS PROVIDED BY ERIC YOUNG ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * The license and distribution terms for any publically available version or
 * derivative of this code cannot be changed.  i.e. this code cannot simply be
 * copied and put under another distribution license
 * [including the GNU Public License.]
 */

#include <stdio.h>
#include <stdlib.h>
#include "openssl_mods.h"


static int allow_customize = 1;      /* we provide flexible functions for */
static int allow_customize_debug = 1;/* exchanging memory-related functions at
                                      * run-time, but this must be done
                                      * before any blocks are actually
                                      * allocated; or we'll run into huge
                                      * problems when malloc/free pairs
                                      * don't match etc. */

/* may be changed as long as `allow_customize' is set */
static void *(*malloc_locked_func)(size_t)  = malloc;
static void (*free_locked_func)(void *)     = free;
static void *(*malloc_func)(size_t)         = malloc;
static void *(*realloc_func)(void *, size_t) = realloc;
static void (*free_func)(void *)            = free;

/* may be changed as long as `allow_customize_debug' is set */
/* XXX use correct function pointer types */
#ifdef CRYPTO_MDEBUG
/* use default functions from mem_dbg.c */
static void (*malloc_debug_func)(void *, int, const char *, int, int)
= CRYPTO_dbg_malloc;
static void (*realloc_debug_func)(void *, void *, int, const char *, int, int)
= CRYPTO_dbg_realloc;
static void (*free_debug_func)(void *, int) = CRYPTO_dbg_free;
static void (*set_debug_options_func)(long) = CRYPTO_dbg_set_options;
static long(*get_debug_options_func)(void) = CRYPTO_dbg_get_options;
#else
/* applications can use CRYPTO_malloc_debug_init() to select above case
 * at run-time */
static void (*malloc_debug_func)(void *, int, const char *, int, int) = NULL;
static void (*realloc_debug_func)(void *, void *, int, const char *, int, int)
= NULL;
static void (*free_debug_func)(void *, int) = NULL;
static void (*set_debug_options_func)(long) = NULL;
static long(*get_debug_options_func)(void) = NULL;
#endif


int CRYPTO_set_mem_functions(void *(*m)(size_t), void *(*r)(void *, size_t),
							 void (*f)(void *))
{
	if(!allow_customize)
		{ return 0; }
	if((m == NULL) || (r == NULL) || (f == NULL))
		{ return 0; }
	malloc_func = m;
	realloc_func = r;
	free_func = f;
	malloc_locked_func = m;
	free_locked_func = f;
	return 1;
}

int CRYPTO_set_locked_mem_functions(void *(*m)(size_t), void (*f)(void *))
{
	if(!allow_customize)
		{ return 0; }
	if((m == NULL) || (f == NULL))
		{ return 0; }
	malloc_locked_func = m;
	free_locked_func = f;
	return 1;
}

int CRYPTO_set_mem_debug_functions(void (*m)(void *, int, const char *, int, int),
								   void (*r)(void *, void *, int, const char *, int, int),
								   void (*f)(void *, int),
								   void (*so)(long),
								   long(*go)(void))
{
	if(!allow_customize_debug)
		{ return 0; }
	malloc_debug_func = m;
	realloc_debug_func = r;
	free_debug_func = f;
	set_debug_options_func = so;
	get_debug_options_func = go;
	return 1;
}

void CRYPTO_get_mem_functions(void *(**m)(size_t), void *(**r)(void *, size_t),
							  void (**f)(void *))
{
	if(m != NULL) { *m = malloc_func; }
	if(r != NULL) { *r = realloc_func; }
	if(f != NULL) { *f = free_func; }
}

void CRYPTO_get_locked_mem_functions(void *(**m)(size_t), void (**f)(void *))
{
	if(m != NULL) { *m = malloc_locked_func; }
	if(f != NULL) { *f = free_locked_func; }
}

void CRYPTO_get_mem_debug_functions(void (**m)(void *, int, const char *, int, int),
									void (**r)(void *, void *, int, const char *, int, int),
									void (**f)(void *, int),
									void (**so)(long),
									long(**go)(void))
{
	if(m != NULL) { *m = malloc_debug_func; }
	if(r != NULL) { *r = realloc_debug_func; }
	if(f != NULL) { *f = free_debug_func; }
	if(so != NULL) { *so = set_debug_options_func; }
	if(go != NULL) { *go = get_debug_options_func; }
}


void *CRYPTO_malloc_locked(int num, const char *file, int line)
{
	void *ret = NULL;

	allow_customize = 0;
	if(malloc_debug_func != NULL)
	{
		allow_customize_debug = 0;
		malloc_debug_func(NULL, num, file, line, 0);
	}
	ret = malloc_locked_func(num);
#ifdef LEVITTE_DEBUG
	fprintf(stderr, "LEVITTE_DEBUG:         > 0x%p (%d)\n", ret, num);
#endif
	if(malloc_debug_func != NULL)
		{ malloc_debug_func(ret, num, file, line, 1); }

	return ret;
}

void CRYPTO_free_locked(void *str)
{
	if(free_debug_func != NULL)
		{ free_debug_func(str, 0); }
#ifdef LEVITTE_DEBUG
	fprintf(stderr, "LEVITTE_DEBUG:         < 0x%p\n", str);
#endif
	free_locked_func(str);
	if(free_debug_func != NULL)
		{ free_debug_func(NULL, 1); }
}

void *CRYPTO_malloc(int num, const char *file, int line)
{
	void *ret = NULL;

	allow_customize = 0;
	if(malloc_debug_func != NULL)
	{
		allow_customize_debug = 0;
		malloc_debug_func(NULL, num, file, line, 0);
	}
	ret = malloc_func(num);
#ifdef LEVITTE_DEBUG
	fprintf(stderr, "LEVITTE_DEBUG:         > 0x%p (%d)\n", ret, num);
#endif
	if(malloc_debug_func != NULL)
		{ malloc_debug_func(ret, num, file, line, 1); }

	return ret;
}

void *CRYPTO_realloc(void *str, int num, const char *file, int line)
{
	void *ret = NULL;

	if(realloc_debug_func != NULL)
		{ realloc_debug_func(str, NULL, num, file, line, 0); }
	ret = realloc_func(str, num);
#ifdef LEVITTE_DEBUG
	fprintf(stderr, "LEVITTE_DEBUG:         | 0x%p -> 0x%p (%d)\n", str, ret, num);
#endif
	if(realloc_debug_func != NULL)
		{ realloc_debug_func(str, ret, num, file, line, 1); }

	return ret;
}

void CRYPTO_free(void *str)
{
	if(free_debug_func != NULL)
		{ free_debug_func(str, 0); }
#ifdef LEVITTE_DEBUG
	fprintf(stderr, "LEVITTE_DEBUG:         < 0x%p\n", str);
#endif
	free_func(str);
	if(free_debug_func != NULL)
		{ free_debug_func(NULL, 1); }
}

void *CRYPTO_remalloc(void *a, int num)
{
	if(a != NULL) { OPENSSL_free(a); }
	a = (char *)OPENSSL_malloc(num);
	return (a);
}


void CRYPTO_set_mem_debug_options(long bits)
{
	if(set_debug_options_func != NULL)
		{ set_debug_options_func(bits); }
}

long CRYPTO_get_mem_debug_options(void)
{
	if(get_debug_options_func != NULL)
		{ return get_debug_options_func(); }
	return 0;
}
#endif