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104 lines
3.3 KiB
104 lines
3.3 KiB
3 months ago
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/* Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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// Some wrappers related to the MEM_ROOT for the current thread.
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// Mostly obsolete.
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#include "sql/thr_malloc.h"
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#include <string.h>
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#include <sys/types.h>
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#include <algorithm>
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#include "m_ctype.h"
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#include "my_alloc.h"
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#include "my_macros.h"
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#include "my_sys.h"
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#include "sql/mysqld.h"
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#include "sql/psi_memory_key.h"
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#include "sql_string.h"
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using std::max;
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using std::min;
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extern "C" void sql_alloc_error_handler(void);
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void init_sql_alloc(PSI_memory_key key, MEM_ROOT *mem_root, size_t block_size,
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size_t pre_alloc) {
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init_alloc_root(key, mem_root, block_size, pre_alloc);
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mem_root->set_error_handler(sql_alloc_error_handler);
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}
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void *sql_calloc(size_t size) {
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void *ptr;
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if ((ptr = (*THR_MALLOC)->Alloc(size))) memset(ptr, 0, size);
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return ptr;
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}
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char *sql_strdup(const char *str) {
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size_t len = strlen(str) + 1;
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char *pos;
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if ((pos = (char *)(*THR_MALLOC)->Alloc(len))) memcpy(pos, str, len);
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return pos;
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}
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char *sql_strmake(const char *str, size_t len) {
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char *pos;
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if ((pos = (char *)(*THR_MALLOC)->Alloc(len + 1))) {
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memcpy(pos, str, len);
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pos[len] = 0;
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}
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return pos;
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}
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void *sql_memdup(const void *ptr, size_t len) {
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void *pos;
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if ((pos = (*THR_MALLOC)->Alloc(len))) memcpy(pos, ptr, len);
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return pos;
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}
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char *sql_strmake_with_convert(const char *str, size_t arg_length,
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const CHARSET_INFO *from_cs,
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size_t max_res_length, const CHARSET_INFO *to_cs,
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size_t *result_length) {
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char *pos;
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size_t new_length = to_cs->mbmaxlen * arg_length;
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max_res_length--; // Reserve place for end null
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set_if_smaller(new_length, max_res_length);
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if (!(pos = (char *)(*THR_MALLOC)->Alloc(new_length + 1)))
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return pos; // Error
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if ((from_cs == &my_charset_bin) || (to_cs == &my_charset_bin)) {
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// Safety if to_cs->mbmaxlen > 0
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new_length = min(arg_length, max_res_length);
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memcpy(pos, str, new_length);
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} else {
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uint dummy_errors;
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new_length = copy_and_convert(pos, new_length, to_cs, str, arg_length,
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from_cs, &dummy_errors);
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}
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pos[new_length] = 0;
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*result_length = new_length;
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return pos;
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}
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