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/* $Id: RTPathParseSimple.cpp $ */
/** @file
* IPRT - RTPathParseSimple
*/
/*
* 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.
*/
/*********************************************************************************************************************************
* Header Files *
*********************************************************************************************************************************/
#include "internal/iprt.h"
#include <iprt/path.h>
/**
* Parses a path.
*
* It figures the length of the directory component, the offset of
* the file name and the location of the suffix dot.
*
* @returns The path length.
*
* @param pszPath Path to find filename in.
* @param pcchDir Where to put the length of the directory component. If
* no directory, this will be 0. Optional.
* @param poffName Where to store the filename offset.
* If empty string or if it's ending with a slash this
* will be set to -1. Optional.
* @param poffSuff Where to store the suffix offset (the last dot).
* If empty string or if it's ending with a slash this
* will be set to -1. Optional.
*/
RTDECL(size_t) RTPathParseSimple(const char *pszPath, size_t *pcchDir, ssize_t *poffName, ssize_t *poffSuff)
{
const char *psz = pszPath;
ssize_t offRoot = 0;
const char *pszName = pszPath;
const char *pszLastDot = NULL;
for (;; psz++)
{
switch (*psz)
{
/* handle separators. */
#if defined(RT_OS_WINDOWS) || defined(RT_OS_OS2)
case ':':
pszName = psz + 1;
offRoot = pszName - psz;
break;
case '\\':
#endif
case '/':
pszName = psz + 1;
break;
case '.':
pszLastDot = psz;
break;
/*
* The end. Complete the results.
*/
case '\0':
{
ssize_t offName = *pszName != '\0' ? pszName - pszPath : -1;
if (poffName)
*poffName = offName;
if (poffSuff)
{
ssize_t offSuff = -1;
if (pszLastDot)
{
offSuff = pszLastDot - pszPath;
if (offSuff <= offName)
offSuff = -1;
}
*poffSuff = offSuff;
}
if (pcchDir)
{
ssize_t off = offName - 1;
while (off >= offRoot && RTPATH_IS_SLASH(pszPath[off]))
off--;
*pcchDir = RT_MAX(off, offRoot) + 1;
}
return psz - pszPath;
}
}
}
/* will never get here */
}
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