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ogrsource.cpp
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ogrsource.cpp
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// Copyright 2003 (c) Barry Rowlingson
// Modified 2006 Roger Bivand
// OGR data source interface
//
// note: the following objects must be deleted or memory leaks:
// OGRDataSource
// OGRFeature
//
// the following objects are owned by their parents, and so
// shouldnt be deleted (they get cleaned up when their parent is deleted)
// OGRLayer
// OGRGeometry
// OGRFeatureDefn
// OGRSpatialReference
//
// see ogrsf_frmts.dox for authoritative notes!
#include "ogrsf_frmts.h"
// R headers moved outside extern "C" 070808 RSB re. note from BDR
//extern "C" {
#include <R.h>
#include <Rinternals.h>
#include <Rdefines.h>
//}
#include "rgdal.h"
#ifdef __cplusplus
extern "C" {
#endif
//#define EJP
// extern "C" {
SEXP RGDAL_ogrInfo(SEXP ogrsourcename, SEXP Layer){
// return FIDs, nFields, fieldInfo
SEXP ans, vec1, vec2, vec3,/*mat,*/drv, dvec;
SEXP itemlist, itemnames, itemwidth, itemtype, itemTypeNames;
SEXP itemlistmaxcount;
#ifdef GDALV2
SEXP dFIDs;
#endif
/*SEXP geotype;*/
int nFIDs, nFields, iField, *nCount, pc=0;
#ifdef GDALV2
GDALDriver *poDriver;
GDALDataset *poDS;
#else
OGRDataSource *poDS;
OGRSFDriver *poDriver;
#endif
OGRLayer *poLayer;
OGRFeature *poFeature;
OGRFeatureDefn *poDefn;
/* OGRGeometry *poGeom;*/
installErrorHandler();
#ifdef GDALV2
poDS=(GDALDataset*) GDALOpenEx(CHAR(STRING_ELT(ogrsourcename, 0)), GDAL_OF_VECTOR, NULL, NULL, NULL);
if(poDS==NULL){
uninstallErrorHandlerAndTriggerError();
error("Cannot open data source");
}
poDriver = poDS->GetDriver();
#else
poDS=OGRSFDriverRegistrar::Open(CHAR(STRING_ELT(ogrsourcename, 0)),
FALSE, &poDriver);
#endif
uninstallErrorHandlerAndTriggerError();
if(poDS==NULL){
installErrorHandler();
#ifdef GDALV2
GDALClose( poDS );
#else
OGRDataSource::DestroyDataSource( poDS );
#endif
uninstallErrorHandlerAndTriggerError();
// delete poDS;
error("Cannot open file");
}
installErrorHandler();
poLayer = poDS->GetLayerByName(CHAR(STRING_ELT(Layer, 0)));
uninstallErrorHandlerAndTriggerError();
if(poLayer == NULL){
installErrorHandler();
#ifdef GDALV2
GDALClose( poDS );
#else
OGRDataSource::DestroyDataSource( poDS );
#endif
uninstallErrorHandlerAndTriggerError();
// delete poDS;
error("Cannot open layer");
}
// allocate a list for return values
PROTECT(ans=allocVector(VECSXP,6)); pc++;
PROTECT(drv=allocVector(STRSXP,1)); pc++;
installErrorHandler();
#ifdef GDALV2
SET_STRING_ELT(drv, 0, mkChar(poDriver->GetDescription()));
#else
SET_STRING_ELT(drv, 0, mkChar(poDriver->GetName()));
#endif
uninstallErrorHandlerAndTriggerError();
SET_VECTOR_ELT(ans,3,drv);
PROTECT(vec1=allocVector(INTSXP,1)); pc++;
installErrorHandler();
#ifdef GDALV2
GIntBig nFIDs64 = poLayer->GetFeatureCount();
nFIDs = (nFIDs64 > INT_MAX) ? INT_MAX :
(nFIDs64 < INT_MIN) ? INT_MIN : (int) nFIDs64;
if ((GIntBig) nFIDs != nFIDs64){
warning("ogrInfo: feature count overflow");
INTEGER(vec1)[0]=NA_INTEGER;
PROTECT(dFIDs=NEW_NUMERIC(1)); pc++;
NUMERIC_POINTER(dFIDs)[0] = (double) nFIDs64;
setAttrib(vec1, install("dFIDs"), dFIDs);
} else {
// store number of FIDs
INTEGER(vec1)[0]=nFIDs;
}
#else
nFIDs = poLayer->GetFeatureCount();
// store number of FIDs
INTEGER(vec1)[0]=nFIDs;
#endif
uninstallErrorHandlerAndTriggerError();
if (nFIDs == -1) {
int i=0;
installErrorHandler();
while( ((poFeature = poLayer->GetNextFeature()) != NULL) && i <= INT_MAX){
i++;
OGRFeature::DestroyFeature( poFeature );
// delete poFeature;
}
uninstallErrorHandlerAndTriggerError();
if (i == INT_MAX) {
error("ogrInfo: undeclared feature count overflow");
} else {
nFIDs = i;
warning("ogrInfo: feature count not given; %d counted", nFIDs);
}
installErrorHandler();
poLayer->ResetReading();
uninstallErrorHandlerAndTriggerError();
INTEGER(vec1)[0]=nFIDs;
}
SET_VECTOR_ELT(ans,0,vec1);
// store other stuff....
installErrorHandler();
poDefn = poLayer->GetLayerDefn();
nFields = poDefn->GetFieldCount();
uninstallErrorHandlerAndTriggerError();
// store number of fields
PROTECT(vec2=allocVector(INTSXP,1)); pc++;
INTEGER(vec2)[0]=nFields;
SET_VECTOR_ELT(ans,1,vec2);
installErrorHandler();
OGREnvelope oExt;
if (poLayer->GetExtent(&oExt, TRUE) == OGRERR_NONE) {
PROTECT(dvec=allocVector(REALSXP,4)); pc++;
REAL(dvec)[0] = oExt.MinX;
REAL(dvec)[1] = oExt.MinY;
REAL(dvec)[2] = oExt.MaxX;
REAL(dvec)[3] = oExt.MaxY;
SET_VECTOR_ELT(ans,4,dvec);
}
uninstallErrorHandlerAndTriggerError();
PROTECT(itemnames=allocVector(STRSXP,nFields)); pc++;
PROTECT(itemtype=allocVector(INTSXP,nFields)); pc++;
PROTECT(itemwidth=allocVector(INTSXP,nFields)); pc++;
// try List types
PROTECT(itemlistmaxcount=allocVector(INTSXP,nFields)); pc++;
PROTECT(itemTypeNames=allocVector(STRSXP,nFields)); pc++;
int listFieldCount=0;
installErrorHandler();
for(iField=0;iField<nFields;iField++){
OGRFieldDefn *poField = poDefn->GetFieldDefn(iField);
SET_STRING_ELT(itemnames,iField,mkChar(poField->GetNameRef()));
INTEGER(itemtype)[iField]=poField->GetType();
if (INTEGER(itemtype)[iField] == OFTIntegerList ||
#ifdef GDALV2
INTEGER(itemtype)[iField] == OFTInteger64List ||
#endif
INTEGER(itemtype)[iField] == OFTRealList ||
INTEGER(itemtype)[iField] == OFTStringList) listFieldCount++;
INTEGER(itemwidth)[iField]=poField->GetWidth();
SET_STRING_ELT(itemTypeNames,iField,mkChar(poField->GetFieldTypeName(
poField->GetType())));
INTEGER(itemlistmaxcount)[iField] = 0;
}
uninstallErrorHandlerAndTriggerError();
PROTECT(vec3=allocVector(INTSXP,1)); pc++;
INTEGER(vec3)[0]=listFieldCount;
SET_VECTOR_ELT(ans,5,vec3);
PROTECT(itemlist=allocVector(VECSXP,5)); pc++;
SET_VECTOR_ELT(itemlist,0,itemnames);
SET_VECTOR_ELT(itemlist,1,itemtype);
SET_VECTOR_ELT(itemlist,2,itemwidth);
SET_VECTOR_ELT(itemlist,3,itemTypeNames);
// try List types
if (listFieldCount > 0) {
poLayer->ResetReading();
OGRFeature* poFeature;
nCount = (int *) R_alloc((size_t) nFields, sizeof(int));
for (iField=0; iField<nFields; iField++) nCount[iField] = 0;
installErrorHandler();
OGRField* psField;
while( (poFeature = poLayer->GetNextFeature()) != NULL ){
for(iField=0; iField<nFields; iField++){
psField = poFeature->GetRawFieldRef(iField);
if (INTEGER(itemtype)[iField] == OFTIntegerList) {
nCount[iField] = psField->IntegerList.nCount;
if (nCount[iField] > INTEGER(itemlistmaxcount)[iField])
INTEGER(itemlistmaxcount)[iField] = nCount[iField];
} else if (INTEGER(itemtype)[iField] == OFTRealList) {
nCount[iField] = psField->RealList.nCount;
if (nCount[iField] > INTEGER(itemlistmaxcount)[iField])
INTEGER(itemlistmaxcount)[iField] = nCount[iField];
} else if (INTEGER(itemtype)[iField] == OFTStringList) {
nCount[iField] = psField->StringList.nCount;
if (nCount[iField] > INTEGER(itemlistmaxcount)[iField])
INTEGER(itemlistmaxcount)[iField] = nCount[iField];
#ifdef GDALV2
} else if (INTEGER(itemtype)[iField] == OFTInteger64List) {
nCount[iField] = psField->StringList.nCount;
if (nCount[iField] > INTEGER(itemlistmaxcount)[iField])
INTEGER(itemlistmaxcount)[iField] = nCount[iField];
#endif
}
}
OGRFeature::DestroyFeature( poFeature );
// delete poFeature;
}
uninstallErrorHandlerAndTriggerError();
}
SET_VECTOR_ELT(itemlist,4,itemlistmaxcount);
SET_VECTOR_ELT(ans,2,itemlist);
installErrorHandler();
#ifdef GDALV2
GDALClose( poDS );
#else
OGRDataSource::DestroyDataSource( poDS );
#endif
uninstallErrorHandlerAndTriggerError();
// delete poDS;
UNPROTECT(pc);
return(ans);
}
// }
#ifdef __cplusplus
}
#endif
#ifdef __cplusplus
extern "C" {
#endif
//extern "C" {
SEXP RGDAL_ogrFIDs(SEXP filename, SEXP layer){
SEXP fids, nf, ii;
int /*layerNum,*/i;
int nFeatures, pc=0;
OGRLayer *poLayer;
OGRFeature *poFeature;
#ifdef GDALV2
GDALDataset *poDS;
#else
OGRDataSource *poDS;
OGRSFDriver *poDriver;
#endif
installErrorHandler();
#ifdef GDALV2
poDS=(GDALDataset*) GDALOpenEx(CHAR(STRING_ELT(filename, 0)), GDAL_OF_VECTOR, NULL, NULL, NULL);
#else
poDS=OGRSFDriverRegistrar::Open(CHAR(STRING_ELT(filename, 0)),
FALSE, &poDriver);
#endif
uninstallErrorHandlerAndTriggerError();
if(poDS==NULL){
error("Cannot open file");
}
installErrorHandler();
poLayer = poDS->GetLayerByName(CHAR(STRING_ELT(layer, 0)));
uninstallErrorHandlerAndTriggerError();
if(poLayer == NULL){
error("Cannot open layer");
}
installErrorHandler();
#ifdef GDALV2
GIntBig nFIDs64 = poLayer->GetFeatureCount();
nFeatures = (nFIDs64 > INT_MAX) ? INT_MAX :
(nFIDs64 < INT_MIN) ? INT_MIN : (int) nFIDs64;
if ((GIntBig) nFeatures != nFIDs64){
uninstallErrorHandlerAndTriggerError();
error("ogrFIDs: feature count overflow");
}
#else
nFeatures=poLayer->GetFeatureCount();
#endif
uninstallErrorHandlerAndTriggerError();
if (nFeatures == -1) {
i=0;
installErrorHandler();
while( ((poFeature = poLayer->GetNextFeature()) != NULL) && i <= INT_MAX){
i++;
OGRFeature::DestroyFeature( poFeature );
// delete poFeature;
}
uninstallErrorHandlerAndTriggerError();
installErrorHandler();
poLayer->ResetReading();
uninstallErrorHandlerAndTriggerError();
if (i == INT_MAX) {
error("ogrFIDs: feature count overflow");
} else {
nFeatures = i;
}
}
PROTECT(fids=allocVector(INTSXP,nFeatures)); pc++;
PROTECT(nf = NEW_INTEGER(1)); pc++;
INTEGER_POINTER(nf)[0] = nFeatures;
PROTECT(ii = NEW_INTEGER(1)); pc++;
installErrorHandler();
poLayer->ResetReading();
uninstallErrorHandlerAndTriggerError();
i=0;
installErrorHandler();
while( (poFeature = poLayer->GetNextFeature()) != NULL ){
INTEGER(fids)[i]= (int) poFeature->GetFID();
i++;
OGRFeature::DestroyFeature( poFeature );
// delete poFeature;
}
uninstallErrorHandlerAndTriggerError();
INTEGER_POINTER(ii)[0] = i;
setAttrib(fids, install("nf"), nf);
setAttrib(fids, install("i"), ii);
installErrorHandler();
#ifdef GDALV2
GDALClose( poDS );
#else
OGRDataSource::DestroyDataSource( poDS );
#endif
uninstallErrorHandlerAndTriggerError();
// delete poDS;
UNPROTECT(pc);
return(fids);
}
// }
#ifdef __cplusplus
}
#endif
#ifdef __cplusplus
extern "C" {
#endif
// extern "C" {
SEXP ogrReadColumn(OGRLayer *poLayer, SEXP FIDs, int iField, int int64){
// read feature data and return something according to the type
OGRFeatureDefn *poDefn;
OGRFieldDefn *poField;
OGRFeature *poFeature;
int iRow, nRows, warn_int64=0;
double dbl_max_int64 = pow(2.0, 53);
SEXP ans = R_NilValue;
nRows=length(FIDs);
// get field data from layer
installErrorHandler();
poDefn = poLayer->GetLayerDefn();
poField = poDefn->GetFieldDefn(iField);
uninstallErrorHandlerAndTriggerError();
if(poField == NULL){
error("Error getting field %d ",iField);
}
// allocate an object for the result depending on the feature type:
installErrorHandler();
switch(poField->GetType()){
case OFTInteger:
PROTECT(ans=allocVector(INTSXP,nRows));
break;
#ifdef GDALV2
case OFTInteger64:
if (int64 == 4) {
PROTECT(ans=allocVector(REALSXP,nRows));
} else if (int64 ==3) {
PROTECT(ans=allocVector(STRSXP,nRows));
} else {
PROTECT(ans=allocVector(INTSXP,nRows));
}
break;
#endif
case OFTReal:
PROTECT(ans=allocVector(REALSXP,nRows));
break;
case OFTString:
PROTECT(ans=allocVector(STRSXP,nRows));
break;
case OFTDate:
PROTECT(ans=allocVector(STRSXP,nRows));
break;
case OFTDateTime:
PROTECT(ans=allocVector(STRSXP,nRows));
break;
case OFTTime:
PROTECT(ans=allocVector(STRSXP,nRows));
break;
default:
const char *desc = poField->GetFieldTypeName(poField->GetType());
uninstallErrorHandlerAndTriggerError();
error("unsupported field type: %s", desc);
break;
}
uninstallErrorHandlerAndTriggerError();
// now go over each row and retrieve data. iRow is an index in a
// vector of FIDs
/*#ifndef EJP
installErrorHandler();
for(iRow=0;iRow<nRows;iRow++){
poFeature=poLayer->GetFeature(INTEGER(FIDs)[iRow]);
if(poFeature == NULL){
error("Error getting feature FID: %d",(INTEGER(FIDs)[iRow]));
}
}
uninstallErrorHandlerAndTriggerError();
#else*/
// EJP, changed into:
installErrorHandler();
poLayer->ResetReading();
iRow = 0;
while((poFeature = poLayer->GetNextFeature()) != NULL) {
//#endif
// now get the value using the right type:
switch(poField->GetType()){
case OFTInteger:
#if ((GDAL_VERSION_MAJOR == 2 && GDAL_VERSION_MINOR >= 2) || GDAL_VERSION_MAJOR > 2)
if (poFeature->IsFieldSetAndNotNull(iField))
#else
if (poFeature->IsFieldSet(iField))
#endif
INTEGER(ans)[iRow]=poFeature->GetFieldAsInteger(iField);
else INTEGER(ans)[iRow]=NA_INTEGER;
break;
#ifdef GDALV2
case OFTInteger64:
#if (GDAL_VERSION_MINOR >= 2 || GDAL_VERSION_MAJOR > 2)
if (poFeature->IsFieldSetAndNotNull(iField)) {
#else
if (poFeature->IsFieldSet(iField)) {
#endif
if (int64 == 4) {
REAL(ans)[iRow] = poFeature->GetFieldAsDouble(iField);
if (REAL(ans)[iRow] > dbl_max_int64) warn_int64 = 1;
} else if (int64 == 3) {
SET_STRING_ELT(ans, iRow,
mkChar(poFeature->GetFieldAsString(iField)));
} else {
GIntBig nVal64 = poFeature->GetFieldAsInteger64(iField);
int nVal = (nVal64 > INT_MAX) ? INT_MAX :
(nVal64 < INT_MIN) ? INT_MIN : (int) nVal64;
INTEGER(ans)[iRow]=nVal;
if (((GIntBig)nVal != nVal64) && int64 == 2) {
warning("Integer64 value clamped: feature %d", iRow);
}
}
} else {
if (int64 == 3) {
SET_STRING_ELT(ans, iRow, NA_STRING);
} else {
INTEGER(ans)[iRow]=NA_INTEGER;
}
}
break;
#endif
case OFTReal:
#if ((GDAL_VERSION_MAJOR == 2 && GDAL_VERSION_MINOR >= 2) || GDAL_VERSION_MAJOR > 2)
if (poFeature->IsFieldSetAndNotNull(iField))
#else
if (poFeature->IsFieldSet(iField))
#endif
REAL(ans)[iRow]=poFeature->GetFieldAsDouble(iField);
else REAL(ans)[iRow]=NA_REAL;
break;
case OFTString:
#if ((GDAL_VERSION_MAJOR == 2 && GDAL_VERSION_MINOR >= 2) || GDAL_VERSION_MAJOR > 2)
if (poFeature->IsFieldSetAndNotNull(iField))
#else
if (poFeature->IsFieldSet(iField))
#endif
SET_STRING_ELT(ans,iRow,mkChar(poFeature->GetFieldAsString(iField)));
else SET_STRING_ELT(ans, iRow, NA_STRING);
break;
case OFTDate:
#if ((GDAL_VERSION_MAJOR == 2 && GDAL_VERSION_MINOR >= 2) || GDAL_VERSION_MAJOR > 2)
if (poFeature->IsFieldSetAndNotNull(iField))
#else
if (poFeature->IsFieldSet(iField))
#endif
SET_STRING_ELT(ans,iRow,mkChar(poFeature->GetFieldAsString(iField)));
else SET_STRING_ELT(ans, iRow, NA_STRING);
break;
case OFTDateTime:
#if ((GDAL_VERSION_MAJOR == 2 && GDAL_VERSION_MINOR >= 2) || GDAL_VERSION_MAJOR > 2)
if (poFeature->IsFieldSetAndNotNull(iField))
#else
if (poFeature->IsFieldSet(iField))
#endif
SET_STRING_ELT(ans,iRow,mkChar(poFeature->GetFieldAsString(iField)));
else SET_STRING_ELT(ans, iRow, NA_STRING);
break;
case OFTTime:
#if ((GDAL_VERSION_MAJOR == 2 && GDAL_VERSION_MINOR >= 2) || GDAL_VERSION_MAJOR > 2)
if (poFeature->IsFieldSetAndNotNull(iField))
#else
if (poFeature->IsFieldSet(iField))
#endif
SET_STRING_ELT(ans,iRow,mkChar(poFeature->GetFieldAsString(iField)));
else SET_STRING_ELT(ans, iRow, NA_STRING);
break;
default:
OGRFeature::DestroyFeature( poFeature );
// delete poFeature;
uninstallErrorHandlerAndTriggerError();
error("Unsupported field type. should have been caught before");
}
OGRFeature::DestroyFeature( poFeature );
// delete poFeature;
//#ifdef EJP
// according to tutorial: OGRFeature::DestroyFeature(poFeature);
// see comment FW in OGR tutorial: We could just "delete" it,
// but this can cause problems in windows builds where the GDAL DLL
// has a different "heap" from the main program. To be on the safe
// side we use a GDAL function to delete the feature.
iRow++;
//#endif
}
if (warn_int64 == 1) {
warning("Integer64 values larger than %g lost significance after conversion to double", dbl_max_int64);
}
uninstallErrorHandlerAndTriggerError();
UNPROTECT(1);
return(ans);
}
// }
#ifdef __cplusplus
}
#endif
#ifdef __cplusplus
extern "C" {
#endif
// extern "C" {
SEXP ogrReadListColumn(OGRLayer *poLayer, SEXP FIDs, int iField, int k, int int64){
// read feature data and return something according to the type
OGRFeatureDefn *poDefn;
OGRFieldDefn *poField;
OGRFeature *poFeature;
int iRow,nRows,nlist;
SEXP ans = R_NilValue;
nRows=length(FIDs);
// get field data from layer
installErrorHandler();
poDefn = poLayer->GetLayerDefn();
poField = poDefn->GetFieldDefn(iField);
uninstallErrorHandlerAndTriggerError();
if(poField == NULL){
error("Error getting field %d ",iField);
}
// allocate an object for the result depending on the feature type:
installErrorHandler();
switch(poField->GetType()){
case OFTIntegerList:
PROTECT(ans=allocVector(INTSXP,nRows));
break;
#ifdef GDALV2
case OFTInteger64List:
if (int64 == 4) {
PROTECT(ans=allocVector(REALSXP,nRows));
} else if (int64 == 3) {
PROTECT(ans=allocVector(STRSXP,nRows));
} else {
PROTECT(ans=allocVector(INTSXP,nRows));
}
break;
#endif
case OFTRealList:
PROTECT(ans=allocVector(REALSXP,nRows));
break;
case OFTStringList:
PROTECT(ans=allocVector(STRSXP,nRows));
break;
default:
const char *desc = poField->GetFieldTypeName(poField->GetType());
uninstallErrorHandlerAndTriggerError();
error("unsupported field type: %s", desc);
break;
}
uninstallErrorHandlerAndTriggerError();
// now go over each row and retrieve data. iRow is an index in a
// vector of FIDs
installErrorHandler();
poLayer->ResetReading();
OGRField* psField;
iRow = 0;
double DINT_MAX = 2251799813685248.0;
double DINT_MIN = -2251799813685248.0;
while((poFeature = poLayer->GetNextFeature()) != NULL) {
#if ((GDAL_VERSION_MAJOR == 2 && GDAL_VERSION_MINOR >= 2) || GDAL_VERSION_MAJOR > 2)
if (poFeature->IsFieldSetAndNotNull(iField)) {
#else
if (poFeature->IsFieldSet(iField)) {
#endif
// now get the value using the right type:
psField = poFeature->GetRawFieldRef(iField);
switch(poField->GetType()){
case OFTIntegerList:
nlist = psField->IntegerList.nCount;
if (k < nlist)
INTEGER(ans)[iRow] = psField->IntegerList.paList[k];
else INTEGER(ans)[iRow]=NA_INTEGER;
break;
#ifdef GDALV2
case OFTInteger64List:
nlist = psField->Integer64List.nCount;
if (k < nlist) {
GIntBig nVal64 = psField->Integer64List.paList[k];
if (int64 == 4) {
REAL(ans)[iRow] = (double) nVal64;
} else if (int64 == 3) {
double dnval = (double) nVal64;
if (dnval > DINT_MAX || dnval < DINT_MIN)
warning("Integer64 value clamped: feature %d", iRow);
char szItem[32];
// CPL FORMAT assumes > ISO C++98
snprintf(szItem, sizeof(szItem), "%.0f", dnval);
SET_STRING_ELT(ans, iRow, mkChar(szItem));
} else {
int nVal = (nVal64 > INT_MAX) ? INT_MAX :
(nVal64 < INT_MIN) ? INT_MIN : (int) nVal64;
if (((GIntBig)nVal != nVal64) && int64 == 2) {
warning("Integer64 value clamped: feature %d", iRow);
}
INTEGER(ans)[iRow]=nVal;
}
} else {
if (int64 == 3) {
SET_STRING_ELT(ans, iRow, NA_STRING);
} else {
INTEGER(ans)[iRow]=NA_INTEGER;
}
}
break;
#endif
case OFTRealList:
nlist = psField->RealList.nCount;
if (k < nlist)
REAL(ans)[iRow] = psField->RealList.paList[k];
else REAL(ans)[iRow]=NA_REAL;
break;
case OFTStringList:
nlist = psField->StringList.nCount;
if (k < nlist)
SET_STRING_ELT(ans,iRow,mkChar(psField->StringList.paList[k]));
else SET_STRING_ELT(ans, iRow, NA_STRING);
break;
default:
OGRFeature::DestroyFeature( poFeature );
// delete poFeature;
uninstallErrorHandlerAndTriggerError();
error("Unsupported field type. should have been caught before");
}
}
OGRFeature::DestroyFeature( poFeature );
// delete poFeature;
iRow++;
}
uninstallErrorHandlerAndTriggerError();
UNPROTECT(1);
return(ans);
}
// }
#ifdef __cplusplus
}
#endif
#ifdef __cplusplus
extern "C" {
#endif
// extern "C" {
SEXP ogrDataFrame(SEXP ogrSource, SEXP Layer, SEXP FIDs, SEXP iFields){
// query an OGR data source and return a list
SEXP ans;
SEXP nListFields, ListFields=R_NilValue, int64;
OGRLayer *poLayer;
#ifdef GDALV2
GDALDataset *poDS;
#else
OGRDataSource *poDS;
OGRSFDriver *poDriver;
#endif
int iField, nflds=length(iFields), j=0, k;
int pc=0;
// open the data source layer or error
installErrorHandler();
#ifdef GDALV2
poDS=(GDALDataset*) GDALOpenEx(CHAR(STRING_ELT(ogrSource, 0)), GDAL_OF_VECTOR, NULL, NULL, NULL);
#else
poDS=OGRSFDriverRegistrar::Open(CHAR(STRING_ELT(ogrSource,0)),
FALSE, &poDriver);
#endif
uninstallErrorHandlerAndTriggerError();
if(poDS==NULL){
error("Cannot open file");
}
installErrorHandler();
poLayer = poDS->GetLayerByName(CHAR(STRING_ELT(Layer, 0)));
uninstallErrorHandlerAndTriggerError();
if(poLayer == NULL){
error("Cannot open layer");
}
PROTECT(int64 = getAttrib(iFields, install("int64"))); pc++;
PROTECT(nListFields = getAttrib(iFields, install("nListFields"))); pc++;
// reserve a list for the result
if (INTEGER_POINTER(nListFields)[0] == 0) {
PROTECT(ans=allocVector(VECSXP,length(iFields))); pc++;
} else {
nflds = INTEGER_POINTER(getAttrib(iFields, install("nflds")))[0];
PROTECT(ans=allocVector(VECSXP,nflds)); pc++;
PROTECT(ListFields = getAttrib(iFields, install("ListFields"))); pc++;
}
// now set each element of the list
installErrorHandler();
if (INTEGER_POINTER(nListFields)[0] == 0) {
for(iField=0;iField<length(iFields);iField++){
SET_VECTOR_ELT(ans,iField,ogrReadColumn(poLayer, FIDs, INTEGER(iFields)[iField], INTEGER(int64)[0]));
}
} else {
j=0;
for(iField=0;iField<length(iFields);iField++){
if (INTEGER_POINTER(ListFields)[iField] == 0) {
SET_VECTOR_ELT(ans, j,
ogrReadColumn(poLayer, FIDs, INTEGER(iFields)[iField], INTEGER(int64)[0]));
j++;
} else {
for (k=0; k < INTEGER_POINTER(ListFields)[iField]; k++) {
SET_VECTOR_ELT(ans, j,
ogrReadListColumn(poLayer, FIDs,
INTEGER(iFields)[iField], k, INTEGER(int64)[0]));
j++;
}
}
}
}
uninstallErrorHandlerAndTriggerError();
// clean up and return
installErrorHandler();
#ifdef GDALV2
GDALClose( poDS );
#else
OGRDataSource::DestroyDataSource( poDS );
#endif
// delete poDS;
uninstallErrorHandlerAndTriggerError();
UNPROTECT(pc);
return(ans);
}
// }
#ifdef __cplusplus
}
#endif
#ifdef __cplusplus
extern "C" {
#endif
// extern "C" {
/* SEXP OGRFeatureInfo (SEXP ogrSource, SEXP Layer){ unused function
SEXP ans=NULL;
OGRLayer *poLayer;
OGRDataSource *poDS;
OGRFeatureDefn *poDefn;
OGRSFDriver *poDriver;
installErrorHandler();
poDS=OGRSFDriverRegistrar::Open(CHAR(STRING_ELT(ogrSource,0)),
FALSE, &poDriver);
uninstallErrorHandlerAndTriggerError();
if(poDS==NULL){
error("Cannot open file");
}
installErrorHandler();
poLayer = poDS->GetLayerByName(CHAR(STRING_ELT(Layer, 0)));
uninstallErrorHandlerAndTriggerError();
if(poLayer == NULL){
error("Cannot open layer");
}
installErrorHandler();
poDefn = poLayer->GetLayerDefn();
uninstallErrorHandlerAndTriggerError();
installErrorHandler();
for( int iAttr = 0; iAttr < poDefn->GetFieldCount(); iAttr++ )
{
OGRFieldDefn *poField = poDefn->GetFieldDefn( iAttr );
Rprintf( "%s: %s (%d.%d)\n",
poField->GetNameRef(),
poField->GetFieldTypeName( poField->GetType() ),
poField->GetWidth(),
poField->GetPrecision() );
}
uninstallErrorHandlerAndTriggerError();
// PROTECT(ans=allocVector(INTSXP,1));
// INTEGER(ans)[0]=999;
installErrorHandler();
OGRDataSource::DestroyDataSource( poDS );
// delete poDS;
uninstallErrorHandlerAndTriggerError();
// UNPROTECT(1);
return(R_NilValue);
}*/
SEXP ogrCheckExists (SEXP ogrSource, SEXP Layer) {
OGRLayer *poLayer;
#ifdef GDALV2
GDALDataset *poDS;
GDALDriver *poDriver;
#else
OGRDataSource *poDS;
OGRSFDriver *poDriver;
#endif
SEXP ans, drv;
int pc=0;
PROTECT(ans=NEW_LOGICAL(1)); pc++;
installErrorHandler();
#ifdef GDALV2
poDS=(GDALDataset*) GDALOpenEx(CHAR(STRING_ELT(ogrSource, 0)), GDAL_OF_VECTOR, NULL, NULL, NULL);
if (poDS != NULL) poDriver = poDS->GetDriver();
#else
poDS=OGRSFDriverRegistrar::Open(CHAR(STRING_ELT(ogrSource, 0)),
FALSE, &poDriver);
#endif
uninstallErrorHandlerAndTriggerError();
if (poDS==NULL){
// installErrorHandler();
// OGRDataSource::DestroyDataSource( poDS );
// uninstallErrorHandlerAndTriggerError();
// delete poDS;
LOGICAL_POINTER(ans)[0] = FALSE;
UNPROTECT(pc);
return(ans);
}
installErrorHandler();
poLayer = poDS->GetLayerByName(CHAR(STRING_ELT(Layer, 0)));
uninstallErrorHandlerAndTriggerError();
if (poLayer == NULL){
installErrorHandler();
#ifdef GDALV2
GDALClose( poDS );
#else
OGRDataSource::DestroyDataSource( poDS );
#endif
uninstallErrorHandlerAndTriggerError();
// delete poDS;
LOGICAL_POINTER(ans)[0] = FALSE;
UNPROTECT(pc);
return(ans);
}
LOGICAL_POINTER(ans)[0] = TRUE;
PROTECT(drv=allocVector(STRSXP,1)); pc++;
installErrorHandler();
#ifdef GDALV2
SET_STRING_ELT(drv, 0, mkChar(poDriver->GetDescription()));
#else
SET_STRING_ELT(drv, 0, mkChar(poDriver->GetName()));
#endif
uninstallErrorHandlerAndTriggerError();
setAttrib(ans, install("driver"), drv);
installErrorHandler();
#ifdef GDALV2
GDALClose( poDS );
#else
OGRDataSource::DestroyDataSource( poDS );
#endif
uninstallErrorHandlerAndTriggerError();
// delete poDS;
UNPROTECT(pc);
return(ans);
}
SEXP RGDAL_ogrDeleteLayer (SEXP ogrSource, SEXP Layer, SEXP ogrDriver) {
OGRLayer *poLayer;
#ifdef GDALV2
GDALDataset *poDS;
GDALDriver *poDriver;
#else
OGRDataSource *poDS;
OGRSFDriver *poDriver;
#endif
int iLayer = -1;
int flag = 0;
installErrorHandler();
#ifdef GDALV2
poDriver = GetGDALDriverManager()->GetDriverByName(CHAR(STRING_ELT(ogrDriver, 0)));
#else
poDriver = OGRSFDriverRegistrar::GetRegistrar()->GetDriverByName(
CHAR(STRING_ELT(ogrDriver, 0)) );
#endif
uninstallErrorHandlerAndTriggerError();
if (poDriver == NULL) {
error("Driver not available");
}
installErrorHandler();
#ifdef GDALV2
poDS=(GDALDataset*) GDALOpenEx(CHAR(STRING_ELT(ogrSource, 0)), GDAL_OF_VECTOR, NULL, NULL, NULL);
if(poDS==NULL){
error("Cannot open data source");
}
if (!EQUAL(CHAR(STRING_ELT(ogrDriver, 0)),
poDS->GetDriver()->GetDescription())) {
GDALClose( poDS );
poDS = NULL;
}