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/*
* Copyright (c) 2008-2010 Stefan Krah. All rights reserved.
*
* 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 above 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS "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.
*/
#include mpdecimal_header
#include <stdio.h>
#include <stdlib.h>
#include "typearith.h"
#include "memory.h"
/* emulate calloc if it is not available */
void *
mpd_callocfunc_em(size_t nmemb, size_t size)
{
void *ptr;
size_t req;
#if MPD_SIZE_MAX < SIZE_MAX
if (nmemb > MPD_SIZE_MAX || size > MPD_SIZE_MAX) {
return NULL;
}
#endif
req = mul_size_t((mpd_size_t)nmemb, (mpd_size_t)size);
if ((ptr = __mingw_dfp_get_globals()->mpd_mallocfunc(req)) == NULL) {
return NULL;
}
/* used on uint32_t or uint64_t */
memset(ptr, 0, req);
return ptr;
}
/* malloc with overflow checking */
void *
mpd_alloc(mpd_size_t nmemb, mpd_size_t size)
{
void *ptr;
mpd_size_t req;
req = mul_size_t(nmemb, size);
if ((ptr = __mingw_dfp_get_globals()->mpd_mallocfunc(req)) == NULL) {
return NULL;
}
return ptr;
}
/* calloc with overflow checking */
void *
mpd_calloc(mpd_size_t nmemb, mpd_size_t size)
{
void *ptr;
if ((ptr = __mingw_dfp_get_globals()->mpd_callocfunc(nmemb, size)) == NULL) {
return NULL;
}
return ptr;
}
/* realloc with overflow checking */
void *
mpd_realloc(void *ptr, mpd_size_t nmemb, mpd_size_t size, uint8_t *err)
{
void *new;
mpd_size_t req;
req = mul_size_t(nmemb, size);
if ((new = __mingw_dfp_get_globals()->mpd_reallocfunc(ptr, req)) == NULL) {
*err = 1;
return ptr;
}
return new;
}
/* struct hack malloc with overflow checking */
void *
mpd_sh_alloc(mpd_size_t struct_size, mpd_size_t nmemb, mpd_size_t size)
{
void *ptr;
mpd_size_t req;
req = mul_size_t(nmemb, size);
req = add_size_t(req, struct_size);
if ((ptr = __mingw_dfp_get_globals()->mpd_mallocfunc(req)) == NULL) {
return NULL;
}
return ptr;
}
/* Allocate a new decimal with data-size 'size'.
* In case of an error the return value is NULL.
*/
mpd_t *
mpd_qnew_size(mpd_ssize_t size)
{
mpd_t *result;
size = (size < __mingw_dfp_get_globals()->MPD_MINALLOC) ? __mingw_dfp_get_globals()->MPD_MINALLOC : size;
if ((result = mpd_alloc(1, sizeof *result)) == NULL) {
return NULL;
}
if ((result->data = mpd_alloc(size, sizeof *result->data)) == NULL) {
__mingw_dfp_get_globals()->mpd_free(result);
return NULL;
}
result->flags = 0;
result->exp = 0;
result->digits = 0;
result->len = 0;
result->alloc = size;
return result;
}
/* Allocate a new decimal with data-size MPD_MINALLOC.
* In case of an error the return value is NULL.
*/
mpd_t *
mpd_qnew(void)
{
return mpd_qnew_size(__mingw_dfp_get_globals()->MPD_MINALLOC);
}
/* Allocate new decimal. Caller can check for NULL or MPD_Malloc_error.
* Raises on error.
*/
mpd_t *
mpd_new(mpd_context_t *ctx)
{
mpd_t *result;
if ((result = mpd_qnew()) == NULL) {
mpd_addstatus_raise(ctx, MPD_Malloc_error);
}
return result;
}
int
mpd_switch_to_dyn(mpd_t *result, mpd_ssize_t size, uint32_t *status)
{
mpd_uint_t *p = result->data;
if ((result->data = mpd_alloc(size, sizeof *result->data)) == NULL) {
result->data = p;
mpd_set_qnan(result);
mpd_set_positive(result);
result->exp = result->digits = result->len = 0;
*status |= MPD_Malloc_error;
return 0;
}
memcpy(result->data, p, result->len * (sizeof *result->data));
result->alloc = size;
mpd_set_dynamic_data(result);
return 1;
}
int
mpd_switch_to_dyn_zero(mpd_t *result, mpd_ssize_t size, uint32_t *status)
{
mpd_uint_t *p = result->data;
if ((result->data = mpd_calloc(size, sizeof *result->data)) == NULL) {
result->data = p;
mpd_set_qnan(result);
mpd_set_positive(result);
result->exp = result->digits = result->len = 0;
*status |= MPD_Malloc_error;
return 0;
}
result->alloc = size;
mpd_set_dynamic_data(result);
return 1;
}
int
mpd_realloc_dyn(mpd_t *result, mpd_ssize_t size, uint32_t *status)
{
uint8_t err = 0;
result->data = mpd_realloc(result->data, size, sizeof *result->data, &err);
if (!err) {
result->alloc = size;
}
else if (size > result->alloc) {
mpd_set_qnan(result);
mpd_set_positive(result);
result->exp = result->digits = result->len = 0;
*status |= MPD_Malloc_error;
return 0;
}
return 1;
}