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/* Copyright (c) 2000, 2015, 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 St, Fifth Floor, Boston, MA 02110-1301 USA */
#include "mysys_priv.h"
#include "my_sys.h"
#include <m_string.h>
/*
Formats a filename with possible replace of directory of extension
Function can handle the case where 'to' == 'name'
For a description of the flag values, consult my_sys.h
The arguments should be in unix format.
*/
char * fn_format(char * to, const char *name, const char *dir,
const char *extension, uint flag)
{
char dev[FN_REFLEN], buff[FN_REFLEN], *pos, *startpos;
const char *ext;
size_t length;
size_t dev_length;
DBUG_ENTER("fn_format");
DBUG_ASSERT(name != NULL);
DBUG_ASSERT(extension != NULL);
DBUG_PRINT("enter",("name: %s dir: %s extension: %s flag: %d",
name,dir,extension,flag));
/* Copy and skip directory */
name+=(length=dirname_part(dev, (startpos=(char *) name), &dev_length));
if (length == 0 || (flag & MY_REPLACE_DIR))
{
DBUG_ASSERT(dir != NULL);
/* Use given directory */
convert_dirname(dev,dir,NullS); /* Fix to this OS */
}
else if ((flag & MY_RELATIVE_PATH) && !test_if_hard_path(dev))
{
DBUG_ASSERT(dir != NULL);
/* Put 'dir' before the given path */
strmake(buff,dev,sizeof(buff)-1);
pos=convert_dirname(dev,dir,NullS);
strmake(pos,buff,sizeof(buff)-1- (int) (pos-dev));
}
if (flag & MY_PACK_FILENAME)
pack_dirname(dev,dev); /* Put in ./.. and ~/.. */
if (flag & MY_UNPACK_FILENAME)
(void) unpack_dirname(dev,dev); /* Replace ~/.. with dir */
if (!(flag & MY_APPEND_EXT) &&
(pos= (char*) strchr(name,FN_EXTCHAR)) != NullS)
{
if ((flag & MY_REPLACE_EXT) == 0) /* If we should keep old ext */
{
length=strlength(name); /* Use old extension */
ext = "";
}
else
{
length= (size_t) (pos-(char*) name); /* Change extension */
ext= extension;
}
}
else
{
length=strlength(name); /* No ext, use the now one */
ext=extension;
}
if (strlen(dev)+length+strlen(ext) >= FN_REFLEN || length >= FN_LEN )
{
/* To long path, return original or NULL */
size_t tmp_length;
if (flag & MY_SAFE_PATH)
DBUG_RETURN(NullS);
tmp_length= strlength(startpos);
DBUG_PRINT("error",("dev: '%s' ext: '%s' length: %u",dev,ext,
(uint) length));
(void) strmake(to, startpos, MY_MIN(tmp_length, FN_REFLEN-1));
}
else
{
if (to == startpos)
{
memmove(buff, name, length); /* Save name for last copy */
name=buff;
}
pos=strmake(my_stpcpy(to,dev),name,length);
(void) my_stpcpy(pos,ext); /* Don't convert extension */
}
/*
If MY_RETURN_REAL_PATH and MY_RESOLVE_SYMLINK is given, only do
realpath if the file is a symbolic link
*/
if (flag & MY_RETURN_REAL_PATH)
(void) my_realpath(to, to, MYF(flag & MY_RESOLVE_SYMLINKS ?
MY_RESOLVE_LINK: 0));
else if (flag & MY_RESOLVE_SYMLINKS)
{
my_stpcpy(buff,to);
(void) my_readlink(to, buff, MYF(0));
}
DBUG_RETURN(to);
} /* fn_format */
/*
strlength(const string str)
Return length of string with end-space:s not counted.
*/
size_t strlength(const char *str)
{
const char * pos;
const char * found;
DBUG_ENTER("strlength");
pos= found= str;
while (*pos)
{
if (*pos != ' ')
{
while (*++pos && *pos != ' ') {};
if (!*pos)
{
found=pos; /* String ends here */
break;
}
}
found=pos;
while (*++pos == ' ') {};
}
DBUG_RETURN((size_t) (found - str));
} /* strlength */
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