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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) 2006-2019 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*
* The contents of this file may alternatively be used under the terms
* of the Common Development and Distribution License Version 1.0
* (CDDL) only, as it comes in the "COPYING.CDDL" file of the
* VirtualBox OSE 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.
*/
/**
* @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])
&& !RTPATH_IS_SLASH(pszPath[2])
&& pszPath[2])
{
/* UNC - skip to the end of the potential namespace or computer name. */
offCur = 2;
while (!RTPATH_IS_SLASH(pszPath[offCur]) && pszPath[offCur])
offCur++;
/* If there is another slash, we considered it a valid UNC path, if
not it's just a root path with an extra slash thrown in. */
if (RTPATH_IS_SLASH(pszPath[offCur]))
{
fProps = RTPATH_PROP_ROOT_SLASH | RTPATH_PROP_UNC | RTPATH_PROP_ABSOLUTE;
offCur++;
cchPath = offCur;
}
else
{
fProps = RTPATH_PROP_ROOT_SLASH | RTPATH_PROP_RELATIVE;
offCur = 1;
cchPath = 1;
}
}
#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 an ? */
uint32_t offSuffix = offStart + cchComp;
while (offSuffix-- > offStart)
if (pszPath[offSuffix] == '.')
{
uint32_t cchSuffix = offStart + cchComp - offSuffix;
if (cchSuffix > 1 && offStart != offSuffix)
{
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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