/******************************************************************************
?*?Copyright?（c）?1999?Frank?Warmerdam
?*
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?*?and/or?sell?copies?of?the?Software?and?to?permit?persons?to?whom?the
?*?Software?is?furnished?to?do?so?subject?to?the?following?conditions:
?*
?*?The?above?copyright?notice?and?this?permission?notice?shall?be?included
?*?in?all?copies?or?substantial?portions?of?the?Software.
?*
?*?THE?SOFTWARE?IS?PROVIDED?“AS?IS“?WITHOUT?WARRANTY?OF?ANY?KIND?EXPRESS
?*?OR?IMPLIED?INCLUDING?BUT?NOT?LIMITED?TO?THE?WARRANTIES?OF?MERCHANTABILITY
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?******************************************************************************
?*
?*?cpl_csv.c:?Support?functions?for?accessing?CSV?files.
?*/

#include?“cpl_serv.h“
#include?“geo_tiffp.h“

/*?====================================================================?*/
/*??????The?CSVTable?is?a?persistant?set?of?info?about?an?open?CSV??????*/
/*??????table.??While?it?doesn‘t?currently?maintain?a?record?index?????*/
/*??????or?in-memory?copy?of?the?table?it?could?be?changed?to?do?so????*/
/*??????in?the?future.??????????????????????????????????????????????????*/
/*?====================================================================?*/
typedef?struct?ctb?{
????FILE????????*fp;

????struct?ctb?*psNext;

????char????????*pszFilename;

????char????????**papszFieldNames;

????char????????**papszRecFields;

????int?????????iLastLine;

????/*?Cache?for?whole?file?*/
????int?????????nLineCount;
????char????????**papszLines;
????int?????????*panLineIndex;
????char????????*pszRawData;
}?CSVTable;

static?CSVTable?*psCSVTableList?=?NULL;

/************************************************************************/
/*?????????????????????????????CSVAccess（）??????????????????????????????*/
/*??????????????????????????????????????????????????????????????????????*/
/*??????This?function?will?fetch?a?handle?to?the?requested?table.???????*/
/*??????If?not?found?in?the?‘‘open?table?list‘‘?the?table?will?be???????*/
/*??????opened?and?added?to?the?list.??Eventually?this?function?may?????*/
/*??????become?public?with?an?abstracted?return?type?so?that????????????*/
/*??????applications?can?set?options?about?the?table.??For?now?this?????*/
/*??????isn‘t?done.?????????????????????????????????????????????????????*/
/************************************************************************/

static?CSVTab