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/* Based on code in the shapelib.maptools.org library.
*
* First version for R's maptools package appears to be
* Copyright 2000-2001 (c) Nicholas Lewin-Koh
*
* Changes for the foreign package
* Copyright (C) 2004 the R Code Development Team
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, a copy is available at
* http://www.r-project.org/Licenses/
*/
#include <stdlib.h>
#include <string.h>
#include "shapefil.h"
#include <R.h>
#include <Rinternals.h>
#include "foreign.h"
static DBFHandle Rdbfwrite(DBFHandle, SEXP, SEXP, SEXP, SEXP);
static char* nameMangleOut(char *dbfFldname, int len)
{
int i;
for(i = 0; i < len; i++)
if (dbfFldname[i] == '.') dbfFldname[i] = '_';
return dbfFldname;
}
SEXP DoWritedbf(SEXP file, SEXP df, SEXP pr, SEXP sc, SEXP DataTypes)
{
DBFHandle hDBF;
if (!isValidString(file))
error (_("first argument must be a file name"));
hDBF = DBFCreate(R_ExpandFileName(CHAR(STRING_ELT(file, 0))));
if (hDBF == NULL) error(_("unable to open file"));
Rdbfwrite(hDBF, df, pr, sc, DataTypes);
DBFClose(hDBF);
return R_NilValue;
}
static DBFHandle
Rdbfwrite(DBFHandle hDBF, SEXP df, SEXP pr, SEXP sc, SEXP DataTypes)
{
int i, iRecord, nflds, nrecs, itmp;
int nWidth;
char szTitle[12];
double rtmp;
SEXP names = getAttrib(df, R_NamesSymbol), this;
nflds = length(df);
nrecs = length(VECTOR_ELT(df, 0));
for(i = 0; i < nflds; i++) {
strncpy(szTitle, CHAR(STRING_ELT(names,i)), 11);
szTitle[11] = '\0';
nWidth = INTEGER(pr)[i];
switch(CHAR(STRING_ELT(DataTypes, i))[0]) {
case 'L':
DBFAddField(hDBF, nameMangleOut(szTitle,11), FTLogical, nWidth, 0);
break;
case 'N':
case 'F':
if(TYPEOF(VECTOR_ELT(df, i)) == INTSXP)
DBFAddField(hDBF, nameMangleOut(szTitle,11), FTInteger,
nWidth, 0);
else
DBFAddField(hDBF, nameMangleOut(szTitle,11), FTDouble, nWidth,
INTEGER(sc)[i]);
break;
case 'C':
DBFAddField(hDBF, nameMangleOut(szTitle,11), FTString, nWidth, 0);
break;
case 'D':
DBFAddField(hDBF, nameMangleOut(szTitle,11), FTDate, 8, 0);
break;
default:
error(_("unknown data type"));
break;
}
}
for(iRecord = 0; iRecord < nrecs; iRecord++) {
for(i = 0; i < nflds; i++) {
switch(TYPEOF(VECTOR_ELT(df, i))) {
case LGLSXP:
itmp = LOGICAL(VECTOR_ELT(df, i))[iRecord];
if(itmp == NA_INTEGER)
DBFWriteNULLAttribute(hDBF, iRecord, i);
else
DBFWriteLogicalAttribute(hDBF, iRecord, i,
(itmp != 0) ? 'T' : 'F');
break;
case INTSXP:
itmp = INTEGER(VECTOR_ELT(df, i))[iRecord];
if(itmp == NA_INTEGER)
DBFWriteNULLAttribute(hDBF, iRecord, i);
else
DBFWriteIntegerAttribute(hDBF, iRecord, i, itmp);
break;
case REALSXP:
rtmp = REAL(VECTOR_ELT(df, i))[iRecord];
if(ISNAN(rtmp))
DBFWriteNULLAttribute(hDBF, iRecord, i);
else
DBFWriteDoubleAttribute(hDBF, iRecord, i, rtmp);
break;
case STRSXP:
this = STRING_ELT(VECTOR_ELT(df,i), iRecord);
if(this == NA_STRING)
DBFWriteNULLAttribute(hDBF, iRecord, i);
else
DBFWriteStringAttribute(hDBF, iRecord, i, CHAR(this));
break;
default:
error(_("unknown data type"));
break;
}
}
}
return(hDBF);
}
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