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/* Copyright (c) 2000, 2011, Oracle and/or its affiliates.
Copyright (c) 2009-2011, Monty Program Ab
Use is subject to license terms.
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 St, Fifth Floor, Boston, MA 02110-1301 USA
*/
/* File : strmake.c
Author : Michael Widenius
Updated: 20 Jul 1984
Defines: strmake()
strmake(dst,src,length) moves length characters, or until end, of src to
dst and appends a closing NUL to dst.
Note that if strlen(src) >= length then dst[length] will be set to \0
strmake() returns pointer to closing null
*/
#include "strings_def.h"
char *strmake(register char *dst, register const char *src, size_t length)
{
while (length--)
{
if (! (*dst++ = *src++))
{
#ifdef EXTRA_DEBUG
/*
'length' is the maximum length of the string; the buffer needs
to be one character larger to accommodate the terminating
'\0'. This is easy to get wrong, so we make sure we write to
the entire length of the buffer to identify incorrect
buffer-sizes. We only initialism the "unused" part of the
buffer here, a) for efficiency, and b) because dst==src is
allowed, so initializing the entire buffer would overwrite the
source-string. Also, we write a character rather than '\0' as
this makes spotting these problems in the results easier.
If we are using purify/valgrind, we only set one character at
end to be able to detect also wrong accesses after the end of
dst.
*/
if (length)
{
#ifdef HAVE_valgrind
dst[length-1]= 'Z';
#else
bfill(dst, length-1, (int) 'Z');
#endif /* HAVE_valgrind */
}
#endif /* EXTRA_DEBUG */
return dst-1;
}
}
*dst=0;
return dst;
}
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