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/* Copyright (C) 2000 MySQL AB
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 <config.h>
#include <drizzled/internal/my_sys.h>
#include <fcntl.h>
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#include <algorithm>
#include <drizzled/internal/m_string.h>
using namespace std;
namespace drizzled
{
namespace internal
{
static size_t strlength(const char *str);
/*
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, uint32_t flag)
{
char dev[FN_REFLEN], buff[FN_REFLEN], *pos;
const char *startpos = name;
const char *ext;
size_t length;
size_t dev_length;
/* Copy and skip directory */
name+=(length=dirname_part(dev, startpos, &dev_length));
if (length == 0 || (flag & MY_REPLACE_DIR))
{
/* Use given directory */
convert_dirname(dev,dir,NULL); /* Fix to this OS */
}
else if ((flag & MY_RELATIVE_PATH) && !test_if_hard_path(dev))
{
/* Put 'dir' before the given path */
strncpy(buff,dev,sizeof(buff)-1);
pos=convert_dirname(dev,dir,NULL);
strncpy(pos,buff,sizeof(buff)-1- (int) (pos-dev));
}
if (flag & MY_UNPACK_FILENAME)
(void) unpack_dirname(dev,dev); /* Replace ~/.. with dir */
if (!(flag & MY_APPEND_EXT) &&
(pos= (char*) strchr(name,FN_EXTCHAR)) != NULL)
{
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)
return NULL;
tmp_length= min(strlength(startpos), (size_t)(FN_REFLEN-1));
strncpy(to,startpos,tmp_length);
to[tmp_length]= '\0';
}
else
{
if (to == startpos)
{
memmove(buff, name, length); /* Save name for last copy */
name=buff;
}
char *tmp= strcpy(to, dev) + strlen(dev);
pos= strncpy(tmp,name,length) + length;
(void) strcpy(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)
{
struct stat stat_buff;
#ifndef __GNU__
char rp_buff[PATH_MAX];
#else
char *rp_buff = NULL;
#endif
if ((!flag & MY_RESOLVE_SYMLINKS) ||
(!lstat(to,&stat_buff) && S_ISLNK(stat_buff.st_mode)))
{
#ifndef __GNU__
if (!realpath(to,rp_buff))
my_load_path(rp_buff, to, NULL);
rp_buff[FN_REFLEN-1]= '\0';
strcpy(to,rp_buff);
#else
// on hurd PATH_MAX isn't but realpath accept NULL and will malloc
rp_buff = realpath(to,NULL);
if (!rp_buff) {
char buffer[FN_REFLEN];
my_load_path(buffer, to, NULL);
buffer[FN_REFLEN-1]= '\0';
strcpy(to,buffer);
} else {
if (strlen(rp_buff) >= FN_REFLEN) {
rp_buff[FN_REFLEN-1]= '\0';
}
strcpy(to,rp_buff);
free(rp_buff);
}
#endif
}
}
else if (flag & MY_RESOLVE_SYMLINKS)
{
strcpy(buff,to);
ssize_t sym_link_size= readlink(buff,to,FN_REFLEN-1);
if (sym_link_size >= 0)
to[sym_link_size]= '\0';
}
return(to);
} /* fn_format */
/*
strlength(const string str)
Return length of string with end-space:s not counted.
*/
static size_t strlength(const char *str)
{
const char* found= str;
const char* pos= str;
while (*pos)
{
if (*pos != ' ')
{
while (*++pos && *pos != ' ') {};
if (!*pos)
{
found=pos; /* String ends here */
break;
}
}
found=pos;
while (*++pos == ' ') {};
}
return((size_t) (found - str));
} /* strlength */
} /* namespace internal */
} /* namespace drizzled */
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