| /* |
| * 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; |
| } |
| |
| |