/*****************************************************************************

Copyright (c) 1994, 2021, Oracle and/or its affiliates.

This program is free software; you can redistribute it and/or modify it under
the terms of the GNU General Public License, version 2.0, as published by the
Free Software Foundation.

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limited to OpenSSL) that is licensed under separate terms, as designated in a
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FOR A PARTICULAR PURPOSE. See the GNU General Public License, version 2.0,
for more details.

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*****************************************************************************/

/** @file ut/ut0mem.cc
 Memory primitives

 Created 5/11/1994 Heikki Tuuri
 *************************************************************************/

#include "ut0mem.h"
#include <stdlib.h>
#include "os0thread.h"
#include "srv0srv.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 = std::min(src_size, size - 1);

    memcpy(dst, src, n);
    dst[n] = '\0';
  }

  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_withkey(UT_NEW_THIS_FILE_PSI_KEY,
                                             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);
}
