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66 lines
2.7 KiB
66 lines
2.7 KiB
5 months ago
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/* Copyright (c) 2000, 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
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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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Without limiting anything contained in the foregoing, this file,
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which is part of C Driver for MySQL (Connector/C), is also subject to the
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Universal FOSS Exception, version 1.0, a copy of which can be found at
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http://oss.oracle.com/licenses/universal-foss-exception.
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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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/* File : strmake.c
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Author : Michael Widenius
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Updated: 20 Jul 1984
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Defines: strmake()
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strmake(dst,src,length) moves length characters, or until end, of src to
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dst and appends a closing NUL to dst.
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Note that if strlen(src) >= length then dst[length] will be set to \0
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strmake() returns pointer to closing null
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*/
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#include <stddef.h>
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#include "m_string.h" // IWYU pragma: keep
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char *strmake(char *dst, const char *src, size_t length) {
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#ifdef EXTRA_DEBUG
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/*
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'length' is the maximum length of the string; the buffer needs
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to be one character larger to accomodate the terminating '\0'.
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This is easy to get wrong, so we make sure we write to the
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entire length of the buffer to identify incorrect buffer-sizes.
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We only initialise the "unused" part of the buffer here, a) for
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efficiency, and b) because dst==src is allowed, so initialising
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the entire buffer would overwrite the source-string. Also, we
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write a character rather than '\0' as this makes spotting these
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problems in the results easier.
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*/
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uint n = 0;
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while (n < length && src[n++])
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;
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memset(dst + n, (int)'Z', length - n + 1);
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#endif
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while (length--)
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if (!(*dst++ = *src++)) return dst - 1;
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*dst = 0;
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return dst;
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}
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