本文整理汇总了C++中OGRFieldDefn::SetPrecision方法的典型用法代码示例。如果您正苦于以下问题：C++ OGRFieldDefn::SetPrecision方法的具体用法？C++ OGRFieldDefn::SetPrecision怎么用？C++ OGRFieldDefn::SetPrecision使用的例子？那么, 这里精选的方法代码示例或许可以为您提供帮助。您也可以进一步了解该方法所在类OGRFieldDefn的用法示例。
在下文中一共展示了OGRFieldDefn::SetPrecision方法的3个代码示例，这些例子默认根据受欢迎程度排序。您可以为喜欢或者感觉有用的代码点赞，您的评价将有助于系统推荐出更棒的C++代码示例。
示例1: oOGRFieldDefn
OGRFeatureDefn * cvct2gdal::CVCT2GDALFeatureDefn ( VCTFeatureDefn * poVCTFeatDefn )
{
OGRFeatureDefn * poOGRFeatDefn = new OGRFeatureDefn();
for ( auto iVCTFieldDefn = poVCTFeatDefn->fielddefnlist.begin();
iVCTFieldDefn != poVCTFeatDefn->fielddefnlist.end(); ++iVCTFieldDefn )
{
OGRFieldDefn oOGRFieldDefn ( "", OFTInteger );
oOGRFieldDefn.SetName ( iVCTFieldDefn->name.c_str() );
oOGRFieldDefn.SetWidth ( iVCTFieldDefn->width );
oOGRFieldDefn.SetPrecision ( iVCTFieldDefn->precision );
oOGRFieldDefn.SetType ( CVCT2GDALFieldType ( iVCTFieldDefn->type ) );
poOGRFeatDefn->AddFieldDefn ( &oOGRFieldDefn );
}
return poOGRFeatDefn;
}示例2:
OGRErr OGRLayerWithTransaction::AlterFieldDefn( int iField,
OGRFieldDefn* poNewFieldDefn,
int nFlags )
{
if( !m_poDecoratedLayer ) return OGRERR_FAILURE;
OGRErr eErr = m_poDecoratedLayer->AlterFieldDefn(iField, poNewFieldDefn, nFlags);
if( m_poFeatureDefn && eErr == OGRERR_NONE )
{
OGRFieldDefn* poSrcFieldDefn = m_poDecoratedLayer->GetLayerDefn()->GetFieldDefn(iField);
OGRFieldDefn* poDstFieldDefn = m_poFeatureDefn->GetFieldDefn(iField);
poDstFieldDefn->SetName(poSrcFieldDefn->GetNameRef());
poDstFieldDefn->SetType(poSrcFieldDefn->GetType());
poDstFieldDefn->SetSubType(poSrcFieldDefn->GetSubType());
poDstFieldDefn->SetWidth(poSrcFieldDefn->GetWidth());
poDstFieldDefn->SetPrecision(poSrcFieldDefn->GetPrecision());
poDstFieldDefn->SetDefault(poSrcFieldDefn->GetDefault());
poDstFieldDefn->SetNullable(poSrcFieldDefn->IsNullable());
}
return eErr;
}示例3: AlterFieldDefn
//.........这里部分代码省略.........
/* Update all the internal features. Hopefully there aren't any */
/* external features referring to our OGRFeatureDefn! */
/* -------------------------------------------------------------------- */
for( GIntBig i = 0; i < nMaxFeatureCount; i++ )
{
if( papoFeatures[i] == NULL )
continue;
OGRField* poFieldRaw = papoFeatures[i]->GetRawFieldRef(iField);
if( papoFeatures[i]->IsFieldSet(iField) )
{
poFieldRaw->Integer64 = poFieldRaw->Integer;
}
}
}
else if (poNewFieldDefn->GetType() == OFTReal &&
poFieldDefn->GetType() == OFTInteger)
{
/* -------------------------------------------------------------------- */
/* Update all the internal features. Hopefully there aren't any */
/* external features referring to our OGRFeatureDefn! */
/* -------------------------------------------------------------------- */
for( GIntBig i = 0; i < nMaxFeatureCount; i++ )
{
if( papoFeatures[i] == NULL )
continue;
OGRField* poFieldRaw = papoFeatures[i]->GetRawFieldRef(iField);
if( papoFeatures[i]->IsFieldSet(iField) )
{
poFieldRaw->Real = poFieldRaw->Integer;
}
}
}
else if (poNewFieldDefn->GetType() == OFTReal &&
poFieldDefn->GetType() == OFTInteger64)
{
/* -------------------------------------------------------------------- */
/* Update all the internal features. Hopefully there aren't any */
/* external features referring to our OGRFeatureDefn! */
/* -------------------------------------------------------------------- */
for( GIntBig i = 0; i < nMaxFeatureCount; i++ )
{
if( papoFeatures[i] == NULL )
continue;
OGRField* poFieldRaw = papoFeatures[i]->GetRawFieldRef(iField);
if( papoFeatures[i]->IsFieldSet(iField) )
{
poFieldRaw->Real = (double) poFieldRaw->Integer64;
}
}
}
else
{
if (poNewFieldDefn->GetType() != OFTString)
{
CPLError( CE_Failure, CPLE_NotSupported,
"Can only convert from OFTInteger to OFTReal, or from anything to OFTString");
return OGRERR_FAILURE;
}
/* -------------------------------------------------------------------- */
/* Update all the internal features. Hopefully there aren't any */
/* external features referring to our OGRFeatureDefn! */
/* -------------------------------------------------------------------- */
for( GIntBig i = 0; i < nMaxFeatureCount; i++ )
{
if( papoFeatures[i] == NULL )
continue;
OGRField* poFieldRaw = papoFeatures[i]->GetRawFieldRef(iField);
if( papoFeatures[i]->IsFieldSet(iField) )
{
char* pszVal = CPLStrdup(papoFeatures[i]->GetFieldAsString(iField));
/* Little trick to unallocate the field */
OGRField sField;
sField.Set.nMarker1 = OGRUnsetMarker;
sField.Set.nMarker2 = OGRUnsetMarker;
papoFeatures[i]->SetField(iField, &sField);
poFieldRaw->String = pszVal;
}
}
}
poFieldDefn->SetType(poNewFieldDefn->GetType());
}
if (nFlags & ALTER_NAME_FLAG)
poFieldDefn->SetName(poNewFieldDefn->GetNameRef());
if (nFlags & ALTER_WIDTH_PRECISION_FLAG)
{
poFieldDefn->SetWidth(poNewFieldDefn->GetWidth());
poFieldDefn->SetPrecision(poNewFieldDefn->GetPrecision());
}
return OGRERR_NONE;
}