/*=========================================================================

??Program:???Visualization?Toolkit
??Module:????vtkPlane.h

??Copyright?（c）?Ken?Martin?Will?Schroeder?Bill?Lorensen
??All?rights?reserved.
??See?Copyright.txt?or?http://www.kitware.com/Copyright.htm?for?details.

?????This?software?is?distributed?WITHOUT?ANY?WARRANTY;?without?even
?????the?implied?warranty?of?MERCHANTABILITY?or?FITNESS?FOR?A?PARTICULAR
?????PURPOSE.??See?the?above?copyright?notice?for?more?information.

=========================================================================*/

#include?“IOUtil.h“

#include?
#include?

IOUtil*?IOUtil::instance?=?NULL;

IOUtil::IOUtil（）
{
????isBigEndian?=?checkIfBigEndian（）;
}

int?IOUtil::readShortInteger（int?pos?ifstream?&in）?{
????in.seekg（pos?ios_base::beg）;
????char?buffer[2];
????in.read（buffer?sizeof（buffer））;

????if?（!isBigEndian）?{
????????swap（buffer?buffer?+?1）;
????}

????short?num;
????memcpy（&num?buffer?2）;
????return?num;
}

void?IOUtil::writeShortInteger（short?num?int?pos?ofstream?&out）
{
????out.seekp（pos?ios_base::beg）;
????char?buffer[2];
????memcpy（buffer?&num?2）;

????if?（!isBigEndian）?{
????????swap（buffer?buffer?+?1）;
????}

????out.write（buffer?sizeof（buffer））;
}

int?IOUtil::readLongInteger（ifstream?&in?int?pos）?{
????in.seekg（pos?ios_base::beg）;
????char?buffer[4];
????in.read（buffer?sizeof（buffer））;

????if?（!isBigEndian）?{
????????swap（buffer?buffer?+?3）;
????????swap（buffer?+?1?buffer?+?2）;
????}

????int?num;
????memcpy（&num?buffer?4）;
????return?num;
}

void?IOUtil::writeLongInteger（int?num?int?pos?ofstream?&out）
{
????out.seekp（pos?ios_base::beg）;
????char?buffer[4];
????memcpy（buffer?&num?4）;

????if?（!isBigEndian）?{
????????swap（buffer?buffer?+?3）;
????????swap（buffer?+?1?buffer?+?2）;
????}

????out.write（buffer?sizeof（buffer））;
}

float?IOUtil::readFloat（ifstream?&in）?{
????char?buffer[4];
????in.read（buffer?sizeof（buffer））;

????if?（!isBigEndian）?{
????????swap（buffer?buffer?+?3）;
????????swap（buffer?+?1?buffer?+?2）;
????}

????float?num;
????memcpy（&num?buffer?4）;
????return?num;
}

void?IOUtil::writeFloat（float?num?ofstream?&out）
{
????char?buffer[4];
????memcpy（buffer?&num??4）;

????if?（!isBigEndian）?{
????????swap（buffer?buffer?+?3）;
????????swap（buffer?+?1?buffer?+?2）;
????}

????out.write（buffer?sizeof（buffer））;
}

char?IOUtil::readChar（ifstream?&in）?{
????char?buffer;
????in.read（&buffer?sizeof（buffer））;
????return?buffer;
}

void?IOUtil::writeChar（char?c?ofstream?&out）
{
????out.write（&csizeof（c））;
}

void?IOUtil::swap（char?*a?char?*b）?{
????char?temp?=?*a;
????*a?=?*b;
????*b?=?temp;
}

int?IOUtil::getFileSize（ifstream?&in）?{
????in.seekg（0?ios_base::end）;
????return?in.tellg（）;
}

?屬性????????????大小?????日期????時間???名稱
-----------?---------??----------?-----??----
?????目錄???????????0??2018-09-20?15:55??data\
?????文件??????255018??2016-11-17?23:45??data\Events.rdv
?????文件?????1658760??2016-11-17?23:45??data\lineA.sgy
?????文件??????665664??2016-11-17?23:45??data\lineB.sgy
?????文件??????640200??2016-11-17?23:45??data\lineC.sgy
?????文件??????882108??2016-11-17?23:45??data\lineD.sgy
?????文件??????474684??2016-11-17?23:45??data\lineE.sgy
?????文件?????6508764??2016-11-17?23:45??data\waha8.sgy
?????文件????????2770??2018-09-20?15:41??IOUtil.cpp
?????文件????????1537??2018-09-20?15:41??IOUtil.h
?????文件?????????117??2018-09-20?14:25??main.cpp
?????文件?????????405??2018-09-20?22:18??SegY.pro
?????文件???????14390??2018-09-21?20:12??SegY.pro.user
?????文件????????2853??2018-09-21?12:49??SegYBytesPositions.h
?????文件???????18060??2018-09-21?20:03??SegYCommon.h
?????文件????????6516??2018-09-20?19:55??SegYIOUtils.cpp
?????文件????????1923??2018-09-20?19:54??SegYIOUtils.h
?????文件????????3943??2018-09-21?13:10??SegYReader.cpp
?????文件????????1429??2018-09-21?13:10??SegYReader.h
?????文件????????6122??2018-09-21?13:10??SegYTraceReader.cpp
?????文件????????1393??2018-09-21?13:10??SegYTraceReader.h
?????文件????????3113??2018-09-21?19:47??SegYTraceWriter.cpp
?????文件????????1342??2018-09-21?19:29??SegYTraceWriter.h
?????文件????????4237??2018-09-21?20:11??SegYWriter.cpp
?????文件????????1650??2018-09-21?19:49??SegYWriter.h
?????文件?????????599??2016-11-17?23:45??Trace.cpp
?????文件?????????865??2016-11-17?23:45??Trace.h