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/* $Id: RTPathParse.cpp.h $ */
/** @file
* IPRT - RTPathParse - Code Template.
*
* This file included multiple times with different path style macros.
*/
/*
* Copyright (C) 2006-2023 Oracle and/or its affiliates.
*
* This file is part of VirtualBox base platform packages, as
* available from https://www.virtualbox.org.
*
* 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, in version 3 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, see <https://www.gnu.org/licenses>.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
* in the VirtualBox distribution, in which case the provisions of the
* CDDL are applicable instead of those of the GPL.
*
* You may elect to license modified versions of this file under the
* terms and conditions of either the GPL or the CDDL or both.
*
* SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
*/
/**
* @copydoc RTPathParse
*/
static int RTPATH_STYLE_FN(rtPathParse)(const char *pszPath, PRTPATHPARSED pParsed, size_t cbParsed, uint32_t fFlags)
{
/*
* Parse the root specification if present and initialize the parser state
* (keep it on the stack for speed).
*/
uint32_t const cMaxComps = cbParsed < RT_UOFFSETOF(RTPATHPARSED, aComps[0xfff0])
? (uint32_t)((cbParsed - RT_UOFFSETOF(RTPATHPARSED, aComps)) / sizeof(pParsed->aComps[0]))
: 0xfff0;
uint32_t idxComp = 0;
uint32_t cchPath;
uint32_t offCur;
uint16_t fProps;
if (RTPATH_IS_SLASH(pszPath[0]))
{
if (fFlags & RTPATH_STR_F_NO_START)
{
offCur = 1;
while (RTPATH_IS_SLASH(pszPath[offCur]))
offCur++;
if (!pszPath[offCur])
return VERR_PATH_ZERO_LENGTH;
fProps = RTPATH_PROP_RELATIVE | RTPATH_PROP_EXTRA_SLASHES;
cchPath = 0;
}
#if RTPATH_STYLE == RTPATH_STR_F_STYLE_DOS
else if (RTPATH_IS_SLASH(pszPath[1]))
{
/* UNC - there are exactly two prefix slashes followed by a namespace
or computer name, which can be empty on windows. */
offCur = 2;
while (!RTPATH_IS_SLASH(pszPath[offCur]) && pszPath[offCur])
offCur++;
/* Special fun for windows. */
fProps = RTPATH_PROP_UNC | RTPATH_PROP_ABSOLUTE;
if ( offCur == 3
&& (pszPath[2] == '.' || pszPath[2] == '?'))
fProps |= RTPATH_PROP_SPECIAL_UNC;
if (RTPATH_IS_SLASH(pszPath[offCur]))
{
fProps |= RTPATH_PROP_ROOT_SLASH;
offCur++;
}
cchPath = offCur;
}
#endif
else
{
#if RTPATH_STYLE == RTPATH_STR_F_STYLE_DOS
fProps = RTPATH_PROP_ROOT_SLASH | RTPATH_PROP_RELATIVE;
#else
fProps = RTPATH_PROP_ROOT_SLASH | RTPATH_PROP_ABSOLUTE;
#endif
offCur = 1;
cchPath = 1;
}
}
#if RTPATH_STYLE == RTPATH_STR_F_STYLE_DOS
else if (RT_C_IS_ALPHA(pszPath[0]) && pszPath[1] == ':')
{
if (!RTPATH_IS_SLASH(pszPath[2]))
{
fProps = RTPATH_PROP_VOLUME | RTPATH_PROP_RELATIVE;
offCur = 2;
}
else
{
fProps = RTPATH_PROP_VOLUME | RTPATH_PROP_ROOT_SLASH | RTPATH_PROP_ABSOLUTE;
offCur = 3;
}
cchPath = offCur;
}
#endif
else
{
fProps = RTPATH_PROP_RELATIVE;
offCur = 0;
cchPath = 0;
}
/* Add it to the component array . */
if (offCur && !(fFlags & RTPATH_STR_F_NO_START))
{
cchPath = offCur;
if (idxComp < cMaxComps)
{
pParsed->aComps[idxComp].off = 0;
pParsed->aComps[idxComp].cch = offCur;
}
idxComp++;
/* Skip unnecessary slashes following the root-spec. */
if (RTPATH_IS_SLASH(pszPath[offCur]))
{
fProps |= RTPATH_PROP_EXTRA_SLASHES;
do
offCur++;
while (RTPATH_IS_SLASH(pszPath[offCur]));
}
}
/*
* Parse the rest.
*/
if (pszPath[offCur])
{
for (;;)
{
Assert(!RTPATH_IS_SLASH(pszPath[offCur]));
/* Find the end of the component. */
uint32_t offStart = offCur;
char ch;
while ((ch = pszPath[offCur]) != '\0' && !RTPATH_IS_SLASH(ch))
offCur++;
if (offCur >= _64K)
return VERR_FILENAME_TOO_LONG;
/* Add it. */
uint32_t cchComp = offCur - offStart;
if (idxComp < cMaxComps)
{
pParsed->aComps[idxComp].off = offStart;
pParsed->aComps[idxComp].cch = cchComp;
}
idxComp++;
cchPath += cchComp;
/* Look for '.' and '..' references. */
if (cchComp == 1 && pszPath[offCur - 1] == '.')
fProps |= RTPATH_PROP_DOT_REFS;
else if (cchComp == 2 && pszPath[offCur - 1] == '.' && pszPath[offCur - 2] == '.')
{
fProps &= ~RTPATH_PROP_ABSOLUTE;
fProps |= RTPATH_PROP_DOTDOT_REFS | RTPATH_PROP_RELATIVE;
}
/* Skip unnecessary slashes. Leave ch unchanged! */
char ch2 = ch;
if (ch2)
{
ch2 = pszPath[++offCur];
if (RTPATH_IS_SLASH(ch2))
{
fProps |= RTPATH_PROP_EXTRA_SLASHES;
do
ch2 = pszPath[++offCur];
while (RTPATH_IS_SLASH(ch2));
}
}
/* The end? */
if (ch2 == '\0')
{
pParsed->offSuffix = offCur;
pParsed->cchSuffix = 0;
if (ch)
{
if (!(fFlags & RTPATH_STR_F_NO_END))
{
fProps |= RTPATH_PROP_DIR_SLASH; /* (not counted in component, but in cchPath) */
cchPath++;
}
else
fProps |= RTPATH_PROP_EXTRA_SLASHES;
}
else if (!(fFlags & RTPATH_STR_F_NO_END))
{
fProps |= RTPATH_PROP_FILENAME;
/* Look for a suffix: */
uint32_t offSuffix = offStart + cchComp;
while (--offSuffix > offStart)
if (pszPath[offSuffix] == '.')
{
uint32_t cchSuffix = offStart + cchComp - offSuffix;
if (cchSuffix > 1)
{
pParsed->cchSuffix = cchSuffix;
pParsed->offSuffix = offSuffix;
fProps |= RTPATH_PROP_SUFFIX;
}
break;
}
}
break;
}
/* No, not the end. Account for an separator before we restart the loop. */
cchPath += sizeof(RTPATH_SLASH_STR) - 1;
}
}
else
{
pParsed->offSuffix = offCur;
pParsed->cchSuffix = 0;
}
if (offCur >= _64K)
return VERR_FILENAME_TOO_LONG;
/*
* Store the remainder of the state and we're done.
*/
pParsed->fProps = fProps;
pParsed->cchPath = cchPath;
pParsed->cComps = idxComp;
return idxComp <= cMaxComps ? VINF_SUCCESS : VERR_BUFFER_OVERFLOW;
}
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