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102 lines
2.9 KiB
C++
102 lines
2.9 KiB
C++
/*****************************************************************************
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Copyright (c) 1994, 2016, Oracle and/or its affiliates. All Rights Reserved.
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This program is free software; you can redistribute it and/or modify it under
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the terms of the GNU General Public License as published by the Free Software
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Foundation; version 2 of the License.
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This program is distributed in the hope that it will be useful, but WITHOUT
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ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
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You should have received a copy of the GNU General Public License along with
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this program; if not, write to the Free Software Foundation, Inc.,
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51 Franklin Street, Fifth Floor, Boston, MA 02110-1335 USA
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*****************************************************************************/
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/********************************************************************//**
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@file ut/ut0mem.cc
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Memory primitives
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Created 5/11/1994 Heikki Tuuri
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*************************************************************************/
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#include "ut0mem.h"
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#include "os0thread.h"
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#include "srv0srv.h"
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#include <stdlib.h>
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/**********************************************************************//**
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Copies up to size - 1 characters from the NUL-terminated string src to
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dst, NUL-terminating the result. Returns strlen(src), so truncation
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occurred if the return value >= size.
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@return strlen(src) */
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ulint
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ut_strlcpy(
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/*=======*/
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char* dst, /*!< in: destination buffer */
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const char* src, /*!< in: source buffer */
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ulint size) /*!< in: size of destination buffer */
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{
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ulint src_size = strlen(src);
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if (size != 0) {
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ulint n = ut_min(src_size, size - 1);
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memcpy(dst, src, n);
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dst[n] = '\0';
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}
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return(src_size);
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}
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/**********************************************************************//**
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Like ut_strlcpy, but if src doesn't fit in dst completely, copies the last
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(size - 1) bytes of src, not the first.
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@return strlen(src) */
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ulint
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ut_strlcpy_rev(
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/*===========*/
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char* dst, /*!< in: destination buffer */
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const char* src, /*!< in: source buffer */
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ulint size) /*!< in: size of destination buffer */
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{
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ulint src_size = strlen(src);
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if (size != 0) {
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ulint n = ut_min(src_size, size - 1);
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memcpy(dst, src + src_size - n, n + 1);
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}
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return(src_size);
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}
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/********************************************************************
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Concatenate 3 strings.*/
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char*
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ut_str3cat(
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/*=======*/
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/* out, own: concatenated string, must be
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freed with ut_free() */
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const char* s1, /* in: string 1 */
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const char* s2, /* in: string 2 */
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const char* s3) /* in: string 3 */
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{
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char* s;
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ulint s1_len = strlen(s1);
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ulint s2_len = strlen(s2);
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ulint s3_len = strlen(s3);
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s = static_cast<char*>(ut_malloc_nokey(s1_len + s2_len + s3_len + 1));
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memcpy(s, s1, s1_len);
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memcpy(s + s1_len, s2, s2_len);
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memcpy(s + s1_len + s2_len, s3, s3_len);
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s[s1_len + s2_len + s3_len] = '\0';
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return(s);
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}
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