253 lines
8.3 KiB
C++
253 lines
8.3 KiB
C++
/*******************************************************************************
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* platformbase.cpp
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*
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* This file implements code that is needed (and linked to) the base code.
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*
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* ---------------------------------------------------------------------------
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* Persistence of Vision Ray Tracer ('POV-Ray') version 3.7.
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* Copyright 1991-2013 Persistence of Vision Raytracer Pty. Ltd.
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*
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* POV-Ray is free software: you can redistribute it and/or modify
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* it under the terms of the GNU Affero General Public License as
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* published by the Free Software Foundation, either version 3 of the
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* License, or (at your option) any later version.
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*
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* POV-Ray is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU Affero General Public License for more details.
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*
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* You should have received a copy of the GNU Affero General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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* ---------------------------------------------------------------------------
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* POV-Ray is based on the popular DKB raytracer version 2.12.
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* DKBTrace was originally written by David K. Buck.
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* DKBTrace Ver 2.0-2.12 were written by David K. Buck & Aaron A. Collins.
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* ---------------------------------------------------------------------------
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* $File: //depot/public/povray/3.x/vfe/unix/platformbase.cpp $
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* $Revision: #1 $
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* $Change: 6069 $
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* $DateTime: 2013/11/06 11:59:40 $
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* $Author: chrisc $
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*******************************************************************************/
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// must come first
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#include "syspovconfig.h"
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#ifdef HAVE_TIME_H
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# include <time.h>
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#endif
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#ifdef HAVE_SYS_TIME_H
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# include <sys/time.h>
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#endif
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#ifdef HAVE_SYS_RESOURCE_H
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# include <sys/resource.h>
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#endif
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#include "vfe.h"
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// this must be the last file included
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#include "base/povdebug.h"
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namespace pov_base
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{
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////////////////////////////////////////////////////////////////////////////////////////
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//
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// needed if we define POV_DELAY_IMPLEMENTED in config.h
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//
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////////////////////////////////////////////////////////////////////////////////////////
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void Delay(unsigned int msec)
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{
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#ifdef HAVE_NANOSLEEP
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timespec ts;
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ts.tv_sec = msec / 1000;
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ts.tv_nsec = (POV_ULONG) (1000000) * (msec % 1000);
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nanosleep(&ts, NULL);
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#else
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// taken from source/base/timer.cpp
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boost::xtime t;
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boost::xtime_get(&t, boost::TIME_UTC);
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POV_ULONG ns = (POV_ULONG)(t.sec) * (POV_ULONG)(1000000000) + (POV_ULONG)(t.nsec) + (POV_ULONG)(msec) * (POV_ULONG)(1000000);
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t.sec = (boost::xtime::xtime_sec_t)(ns / (POV_ULONG)(1000000000));
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t.nsec = (boost::xtime::xtime_nsec_t)(ns % (POV_ULONG)(1000000000));
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boost::thread::sleep(t);
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#endif
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}
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////////////////////////////////////////////////////////////////////////////////////////
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//
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// thread support
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//
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////////////////////////////////////////////////////////////////////////////////////////
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/////////////////////////////////////////////////////////////////////////
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// called by the base code each time a worker thread is created (the call
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// is made in the context of the new thread).
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void vfeSysThreadStartup(void)
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{
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}
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/////////////////////////////////////////////////////////////////////////
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// called by a worker thread just before it exits.
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void vfeSysThreadCleanup(void)
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{
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}
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////////////////////////////////////////////////////////////////////////////////////////
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//
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// class vfeTimer (OPTIONAL)
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//
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// if you don't want to supply this class, remove the definition for POV_TIMER from
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// config.h. see the base code for documentation on the implementation requirements.
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//
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////////////////////////////////////////////////////////////////////////////////////////
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vfeTimer::vfeTimer (bool CPUTimeIsThreadOnly)
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{
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m_ThreadTimeOnly = CPUTimeIsThreadOnly;
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Reset();
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}
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vfeTimer::~vfeTimer ()
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{
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}
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unsigned POV_LONG vfeTimer::GetWallTime (void) const
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{
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#ifdef HAVE_CLOCK_GETTIME
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struct timespec ts;
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if (clock_gettime(CLOCK_REALTIME, &ts) == 0)
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return (unsigned POV_LONG) (1000)*ts.tv_sec + ts.tv_nsec/1000000;
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#endif
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#ifdef HAVE_GETTIMEOFDAY
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struct timeval tv; // seconds + microseconds since the Epoch (1970-01-01)
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if (gettimeofday(&tv, NULL) == 0)
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return (unsigned POV_LONG) (1000)*tv.tv_sec + tv.tv_usec/1000;
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#endif
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return 0; // FIXME: add fallback, using ftime(), or time() + a counter for ms
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}
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unsigned POV_LONG vfeTimer::GetCPUTime (void) const
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{
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#ifdef HAVE_CLOCK_GETTIME
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struct timespec ts;
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#if defined (__FreeBSD__)
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if (clock_gettime(m_ThreadTimeOnly ? CLOCK_THREAD_CPUTIME_ID : CLOCK_REALTIME, &ts) == 0)
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#else
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if (clock_gettime(m_ThreadTimeOnly ? CLOCK_THREAD_CPUTIME_ID : CLOCK_PROCESS_CPUTIME_ID, &ts) == 0)
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#endif
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return (unsigned POV_LONG) (1000)*ts.tv_sec + ts.tv_nsec/1000000;
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#endif
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#ifdef HAVE_GETRUSAGE
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struct rusage ru;
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#if defined(__sun)
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if (getrusage(m_ThreadTimeOnly ? RUSAGE_LWP : RUSAGE_SELF, &ru) == 0)
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#else
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if (getrusage(RUSAGE_SELF, &ru) == 0)
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#endif
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return (unsigned POV_LONG) (1000)*(ru.ru_utime.tv_sec + ru.ru_stime.tv_sec)
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+ (unsigned POV_LONG)(ru.ru_utime.tv_usec + ru.ru_stime.tv_usec)/1000;
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#endif
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return GetWallTime();
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}
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POV_LONG vfeTimer::ElapsedRealTime (void) const
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{
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return GetWallTime() - m_WallTimeStart;
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}
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POV_LONG vfeTimer::ElapsedCPUTime (void) const
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{
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return GetCPUTime() - m_CPUTimeStart;
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}
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void vfeTimer::Reset (void)
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{
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m_WallTimeStart = GetWallTime();
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m_CPUTimeStart = GetCPUTime();
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}
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bool vfeTimer::HasValidCPUTime() const
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{
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#ifdef HAVE_CLOCK_GETTIME
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struct timespec ts;
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if (clock_gettime(CLOCK_THREAD_CPUTIME_ID, &ts) == 0)
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return true;
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#endif
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#ifdef HAVE_GETRUSAGE
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#if defined(__sun)
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struct rusage ru;
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if (getrusage(RUSAGE_LWP, &ru) == 0)
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return true;
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#endif
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#endif
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return false;
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}
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////////////////////////////////////////////////////////////////////////////////////////
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//
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// path parsing
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//
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////////////////////////////////////////////////////////////////////////////////////////
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////////////////////////////////////////////////////////////////////////////////////////
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// The first argument is the input, a UCS2 string.
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//
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// The second argument is the string you are supposed to return the "volume"
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// name with. For DOS-style paths this implies i.e. "A:\" is the "volume".
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// Note that it is essential that the first "path" separator is also part of
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// the volume name. If the path is relative, the "volume" name shall be empty.
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//
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// This trick is necessary so the code can account for the lack of volume names
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// in Unix-style paths: In Unix, the POV_PARSE_PATH_STRING function will have
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// to take a reading "/" or "~/" as "volume" name. This makes it possible to
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// determine if a string is absolute or relative based on this 'virtual'
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// "volume" name rather than some flags.
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//
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// The third is a vector of strings you have to return, each has to contain the
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// folder name from left to right, without the path separator, of course.
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//
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// The fourth argument shall contain the filename, if any was given in the
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// source string. By definition if the source string does not contain a
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// trailing path separator, whatever comes after the last path separator
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// (or the start of the string if there is none) must be considered a filename,
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// even if it could be a directory (in other words, don't call a system function
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// to find out if it is a dir or not - see below).
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//
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// Please note that the function must not attempt to determine the validity of
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// a string by accessing the filesystem. It has to parse anything that it is
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// given. If the string provided cannot be parsed for some reason (that is if
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// you can determine that a given path cannot possibly be valid i.e. because it
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// contains invalid characters), the function has to return false. It may not
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// throw exceptions. The return value for success is true.
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////////////////////////////////////////////////////////////////////////////////////////
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bool vfeParsePathString (const UCS2String& path, UCS2String& volume, vector<UCS2String>& components, UCS2String& filename)
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{
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UCS2String q;
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if(path.empty() == true)
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return true;
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if(path[0] == '/')
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volume = '/';
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for(size_t i = 0; i < path.length(); ++i)
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{
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if(path[i] == '/')
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{
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if(q.empty() == false)
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components.push_back(q);
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q.clear();
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}
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else
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q += path[i];
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}
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filename = q;
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return true;
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}
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}
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