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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., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#include "mysys_priv.h"
#include <mystrings/m_string.h>
/* Functions definied in this file */
size_t dirname_length(const char *name)
{
register const char *pos, *gpos;
#ifdef BASKSLASH_MBTAIL
CHARSET_INFO *fs= fs_character_set();
#endif
#ifdef FN_DEVCHAR
if ((pos=(char*)strrchr(name,FN_DEVCHAR)) == 0)
#endif
pos=name-1;
gpos= pos++;
for ( ; *pos ; pos++) /* Find last FN_LIBCHAR */
{
#ifdef BASKSLASH_MBTAIL
uint32_t l;
if (use_mb(fs) && (l= my_ismbchar(fs, pos, pos + 3)))
{
pos+= l - 1;
continue;
}
#endif
if (*pos == FN_LIBCHAR || *pos == '/'
#ifdef FN_C_AFTER_DIR
|| *pos == FN_C_AFTER_DIR || *pos == FN_C_AFTER_DIR_2
#endif
)
gpos=pos;
}
return gpos-name+1;
}
/*
Gives directory part of filename. Directory ends with '/'
SYNOPSIS
dirname_part()
to Store directory name here
name Original name
to_length Store length of 'to' here
RETURN
# Length of directory part in 'name'
*/
size_t dirname_part(char *to, const char *name, size_t *to_res_length)
{
size_t length;
length=dirname_length(name);
*to_res_length= (size_t) (convert_dirname(to, name, name+length) - to);
return(length);
} /* dirname */
/*
Convert directory name to use under this system
SYNPOSIS
convert_dirname()
to Store result here. Must be at least of size
cmin(FN_REFLEN, strlen(from) + 1) to make room
for adding FN_LIBCHAR at the end.
from Original filename. May be == to
from_end Pointer at end of filename (normally end \0)
IMPLEMENTATION
If MSDOS converts '/' to '\'
If VMS converts '<' to '[' and '>' to ']'
Adds a FN_LIBCHAR to end if the result string if there isn't one
and the last isn't dev_char.
Copies data from 'from' until ASCII(0) for until from == from_end
If you want to use the whole 'from' string, just send NULL as the
last argument.
If the result string is larger than FN_REFLEN -1, then it's cut.
RETURN
Returns pointer to end \0 in to
*/
#ifndef FN_DEVCHAR
#define FN_DEVCHAR '\0' /* For easier code */
#endif
char *convert_dirname(char *to, const char *from, const char *from_end)
{
char *to_org=to;
#ifdef BACKSLASH_MBTAIL
CHARSET_INFO *fs= fs_character_set();
#endif
/* We use -2 here, becasue we need place for the last FN_LIBCHAR */
if (!from_end || (from_end - from) > FN_REFLEN-2)
from_end=from+FN_REFLEN -2;
#if FN_LIBCHAR != '/' || defined(FN_C_BEFORE_DIR_2)
{
for (; from != from_end && *from ; from++)
{
if (*from == '/')
*to++= FN_LIBCHAR;
#ifdef FN_C_BEFORE_DIR_2
else if (*from == FN_C_BEFORE_DIR_2)
*to++= FN_C_BEFORE_DIR;
else if (*from == FN_C_AFTER_DIR_2)
*to++= FN_C_AFTER_DIR;
#endif
else
{
#ifdef BACKSLASH_MBTAIL
uint32_t l;
if (use_mb(fs) && (l= my_ismbchar(fs, from, from + 3)))
{
memmove(to, from, l);
to+= l;
from+= l - 1;
to_org= to; /* Don't look inside mbchar */
}
else
#endif
{
*to++= *from;
}
}
}
*to=0;
}
#else
/* This is ok even if to == from, becasue we need to cut the string */
size_t len= cmin(strlen(from),(size_t)(from_end-from));
assert(memmove(to, from, len));
to+= len;
to[0]= '\0';
#endif
/* Add FN_LIBCHAR to the end of directory path */
if (to != to_org && (to[-1] != FN_LIBCHAR && to[-1] != FN_DEVCHAR))
{
*to++=FN_LIBCHAR;
*to=0;
}
return(to); /* Pointer to end of dir */
} /* convert_dirname */
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