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