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ogrgmtlayer.cpp
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/******************************************************************************
*
* Project: OpenGIS Simple Features Reference Implementation
* Purpose: Implements OGRGmtLayer class.
* Author: Frank Warmerdam, warmerdam@pobox.com
*
******************************************************************************
* Copyright (c) 2007, Frank Warmerdam <warmerdam@pobox.com>
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* 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,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
* DEALINGS IN THE SOFTWARE.
****************************************************************************/
#include "ogr_gmt.h"
#include "cpl_conv.h"
#include "ogr_p.h"
#include <algorithm>
/************************************************************************/
/* OGRGmtLayer() */
/************************************************************************/
OGRGmtLayer::OGRGmtLayer(const char *pszFilename, VSILFILE *fp,
const OGRSpatialReference *poSRS, int bUpdateIn)
: poFeatureDefn(nullptr), iNextFID(0), bUpdate(CPL_TO_BOOL(bUpdateIn)),
// Assume header complete in readonly mode.
bHeaderComplete(CPL_TO_BOOL(!bUpdate)), bRegionComplete(false),
nRegionOffset(0),
m_fp(fp ? fp : VSIFOpenL(pszFilename, (bUpdateIn ? "r+" : "r"))),
papszKeyedValues(nullptr), bValidFile(false)
{
if (m_fp == nullptr)
return;
/* -------------------------------------------------------------------- */
/* Create the feature definition */
/* -------------------------------------------------------------------- */
poFeatureDefn = new OGRFeatureDefn(CPLGetBasename(pszFilename));
SetDescription(poFeatureDefn->GetName());
poFeatureDefn->Reference();
/* -------------------------------------------------------------------- */
/* Read the header. */
/* -------------------------------------------------------------------- */
if (!STARTS_WITH(pszFilename, "/vsistdout"))
{
CPLString osFieldNames;
CPLString osFieldTypes;
CPLString osGeometryType;
CPLString osRegion;
CPLString osWKT;
CPLString osProj4;
CPLString osEPSG;
vsi_l_offset nStartOfLine = 0;
VSIFSeekL(m_fp, 0, SEEK_SET);
while (ReadLine() && osLine[0] == '#')
{
if (strstr(osLine, "FEATURE_DATA"))
{
bHeaderComplete = true;
ReadLine();
break;
}
if (STARTS_WITH_CI(osLine, "# REGION_STUB "))
nRegionOffset = nStartOfLine;
for (int iKey = 0; papszKeyedValues != nullptr &&
papszKeyedValues[iKey] != nullptr;
iKey++)
{
if (papszKeyedValues[iKey][0] == 'N')
osFieldNames = papszKeyedValues[iKey] + 1;
if (papszKeyedValues[iKey][0] == 'T')
osFieldTypes = papszKeyedValues[iKey] + 1;
if (papszKeyedValues[iKey][0] == 'G')
osGeometryType = papszKeyedValues[iKey] + 1;
if (papszKeyedValues[iKey][0] == 'R')
osRegion = papszKeyedValues[iKey] + 1;
if (papszKeyedValues[iKey][0] == 'J' &&
papszKeyedValues[iKey][1] != 0 &&
papszKeyedValues[iKey][2] != 0)
{
CPLString osArg = papszKeyedValues[iKey] + 2;
if (osArg[0] == '"' && osArg.size() >= 2 &&
osArg.back() == '"')
{
osArg = osArg.substr(1, osArg.length() - 2);
char *pszArg = CPLUnescapeString(
osArg, nullptr, CPLES_BackslashQuotable);
osArg = pszArg;
CPLFree(pszArg);
}
if (papszKeyedValues[iKey][1] == 'e')
osEPSG = osArg;
if (papszKeyedValues[iKey][1] == 'p')
osProj4 = osArg;
if (papszKeyedValues[iKey][1] == 'w')
osWKT = osArg;
}
}
nStartOfLine = VSIFTellL(m_fp);
}
/* --------------------------------------------------------------------
*/
/* Handle coordinate system. */
/* --------------------------------------------------------------------
*/
if (osWKT.length())
{
m_poSRS = new OGRSpatialReference();
m_poSRS->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
if (m_poSRS->importFromWkt(osWKT.c_str()) != OGRERR_NONE)
{
delete m_poSRS;
m_poSRS = nullptr;
}
}
else if (osEPSG.length())
{
m_poSRS = new OGRSpatialReference();
m_poSRS->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
if (m_poSRS->importFromEPSG(atoi(osEPSG)) != OGRERR_NONE)
{
delete m_poSRS;
m_poSRS = nullptr;
}
}
else if (osProj4.length())
{
m_poSRS = new OGRSpatialReference();
m_poSRS->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
if (m_poSRS->importFromProj4(osProj4) != OGRERR_NONE)
{
delete m_poSRS;
m_poSRS = nullptr;
}
}
if (osGeometryType == "POINT")
poFeatureDefn->SetGeomType(wkbPoint);
else if (osGeometryType == "MULTIPOINT")
poFeatureDefn->SetGeomType(wkbMultiPoint);
else if (osGeometryType == "LINESTRING")
poFeatureDefn->SetGeomType(wkbLineString);
else if (osGeometryType == "MULTILINESTRING")
poFeatureDefn->SetGeomType(wkbMultiLineString);
else if (osGeometryType == "POLYGON")
poFeatureDefn->SetGeomType(wkbPolygon);
else if (osGeometryType == "MULTIPOLYGON")
poFeatureDefn->SetGeomType(wkbMultiPolygon);
/* --------------------------------------------------------------------
*/
/* Process a region line. */
/* --------------------------------------------------------------------
*/
if (osRegion.length() > 0)
{
char **papszTokens =
CSLTokenizeStringComplex(osRegion.c_str(), "/", FALSE, FALSE);
if (CSLCount(papszTokens) == 4)
{
sRegion.MinX = CPLAtofM(papszTokens[0]);
sRegion.MaxX = CPLAtofM(papszTokens[1]);
sRegion.MinY = CPLAtofM(papszTokens[2]);
sRegion.MaxY = CPLAtofM(papszTokens[3]);
}
bRegionComplete = true;
CSLDestroy(papszTokens);
}
/* --------------------------------------------------------------------
*/
/* Process fields. */
/* --------------------------------------------------------------------
*/
if (osFieldNames.length() || osFieldTypes.length())
{
char **papszFN =
CSLTokenizeStringComplex(osFieldNames, "|", TRUE, TRUE);
char **papszFT =
CSLTokenizeStringComplex(osFieldTypes, "|", TRUE, TRUE);
const int nFNCount = CSLCount(papszFN);
const int nFTCount = CSLCount(papszFT);
const int nFieldCount = std::max(nFNCount, nFTCount);
for (int iField = 0; iField < nFieldCount; iField++)
{
OGRFieldDefn oField("", OFTString);
if (iField < nFNCount)
oField.SetName(papszFN[iField]);
else
oField.SetName(CPLString().Printf("Field_%d", iField + 1));
if (iField < nFTCount)
{
if (EQUAL(papszFT[iField], "integer"))
oField.SetType(OFTInteger);
else if (EQUAL(papszFT[iField], "double"))
oField.SetType(OFTReal);
else if (EQUAL(papszFT[iField], "datetime"))
oField.SetType(OFTDateTime);
}
poFeatureDefn->AddFieldDefn(&oField);
}
CSLDestroy(papszFN);
CSLDestroy(papszFT);
}
}
else
{
if (poSRS)
{
m_poSRS = poSRS->Clone();
m_poSRS->SetAxisMappingStrategy(OAMS_TRADITIONAL_GIS_ORDER);
}
}
poFeatureDefn->GetGeomFieldDefn(0)->SetSpatialRef(m_poSRS);
bValidFile = true;
}
/************************************************************************/
/* ~OGRGmtLayer() */
/************************************************************************/
OGRGmtLayer::~OGRGmtLayer()
{
if (m_nFeaturesRead > 0 && poFeatureDefn != nullptr)
{
CPLDebug("Gmt", "%d features read on layer '%s'.",
static_cast<int>(m_nFeaturesRead), poFeatureDefn->GetName());
}
/* -------------------------------------------------------------------- */
/* Write out the region bounds if we know where they go, and we */
/* are in update mode. */
/* -------------------------------------------------------------------- */
if (nRegionOffset != 0 && bUpdate)
{
VSIFSeekL(m_fp, nRegionOffset, SEEK_SET);
VSIFPrintfL(m_fp, "# @R%.12g/%.12g/%.12g/%.12g", sRegion.MinX,
sRegion.MaxX, sRegion.MinY, sRegion.MaxY);
}
/* -------------------------------------------------------------------- */
/* Clean up. */
/* -------------------------------------------------------------------- */
CSLDestroy(papszKeyedValues);
if (poFeatureDefn)
poFeatureDefn->Release();
if (m_poSRS)
m_poSRS->Release();
if (m_fp != nullptr)
VSIFCloseL(m_fp);
}
/************************************************************************/
/* ReadLine() */
/* */
/* Read a line into osLine. If it is a comment line with @ */
/* keyed values, parse out the keyed values into */
/* papszKeyedValues. */
/************************************************************************/
bool OGRGmtLayer::ReadLine()
{
/* -------------------------------------------------------------------- */
/* Clear last line. */
/* -------------------------------------------------------------------- */
osLine.erase();
if (papszKeyedValues)
{
CSLDestroy(papszKeyedValues);
papszKeyedValues = nullptr;
}
/* -------------------------------------------------------------------- */
/* Read newline. */
/* -------------------------------------------------------------------- */
const char *pszLine = CPLReadLineL(m_fp);
if (pszLine == nullptr)
return false; // end of file.
osLine = pszLine;
/* -------------------------------------------------------------------- */
/* If this is a comment line with keyed values, parse them. */
/* -------------------------------------------------------------------- */
if (osLine[0] != '#' || osLine.find_first_of('@') == std::string::npos)
return true;
CPLStringList aosKeyedValues;
for (size_t i = 0; i < osLine.length(); i++)
{
if (osLine[i] == '@' && i + 2 <= osLine.size())
{
bool bInQuotes = false;
size_t iValEnd = i + 2; // Used after for.
for (; iValEnd < osLine.length(); iValEnd++)
{
if (!bInQuotes && isspace((unsigned char)osLine[iValEnd]))
break;
if (bInQuotes && iValEnd < osLine.length() - 1 &&
osLine[iValEnd] == '\\')
{
iValEnd++;
}
else if (osLine[iValEnd] == '"')
bInQuotes = !bInQuotes;
}
const CPLString osValue = osLine.substr(i + 2, iValEnd - i - 2);
// Unecape contents
char *pszUEValue =
CPLUnescapeString(osValue, nullptr, CPLES_BackslashQuotable);
CPLString osKeyValue = osLine.substr(i + 1, 1);
osKeyValue += pszUEValue;
CPLFree(pszUEValue);
aosKeyedValues.AddString(osKeyValue);
i = iValEnd;
}
}
papszKeyedValues = aosKeyedValues.StealList();
return true;
}
/************************************************************************/
/* ResetReading() */
/************************************************************************/
void OGRGmtLayer::ResetReading()
{
if (iNextFID == 0)
return;
iNextFID = 0;
VSIFSeekL(m_fp, 0, SEEK_SET);
ReadLine();
}
/************************************************************************/
/* ScanAheadForHole() */
/* */
/* Scan ahead to see if the next geometry is a hole. If so */
/* return true, otherwise seek back to where we were and return */
/* false. */
/************************************************************************/
bool OGRGmtLayer::ScanAheadForHole()
{
const CPLString osSavedLine = osLine;
const vsi_l_offset nSavedLocation = VSIFTellL(m_fp);
while (ReadLine() && osLine[0] == '#')
{
if (papszKeyedValues != nullptr && papszKeyedValues[0][0] == 'H')
return true;
}
VSIFSeekL(m_fp, nSavedLocation, SEEK_SET);
osLine = osSavedLine;
// We do not actually restore papszKeyedValues, but we
// assume it does not matter since this method is only called
// when processing the '>' line.
return false;
}
/************************************************************************/
/* NextIsFeature() */
/* */
/* Returns true if the next line is a feature attribute line. */
/* This generally indicates the end of a multilinestring or */
/* multipolygon feature. */
/************************************************************************/
bool OGRGmtLayer::NextIsFeature()
{
const CPLString osSavedLine = osLine;
const vsi_l_offset nSavedLocation = VSIFTellL(m_fp);
bool bReturn = false;
ReadLine();
if (osLine[0] == '#' && strstr(osLine, "@D") != nullptr)
bReturn = true;
VSIFSeekL(m_fp, nSavedLocation, SEEK_SET);
osLine = osSavedLine;
// We do not actually restore papszKeyedValues, but we
// assume it does not matter since this method is only called
// when processing the '>' line.
return bReturn;
}
/************************************************************************/
/* GetNextRawFeature() */
/************************************************************************/
OGRFeature *OGRGmtLayer::GetNextRawFeature()
{
#if 0
bool bMultiVertex =
poFeatureDefn->GetGeomType() != wkbPoint
&& poFeatureDefn->GetGeomType() != wkbUnknown;
#endif
CPLString osFieldData;
OGRGeometry *poGeom = nullptr;
/* -------------------------------------------------------------------- */
/* Read lines associated with this feature. */
/* -------------------------------------------------------------------- */
for (; true; ReadLine())
{
if (osLine.length() == 0)
break;
if (osLine[0] == '>')
{
OGRwkbGeometryType eType = wkbUnknown;
if (poGeom)
eType = wkbFlatten(poGeom->getGeometryType());
if (eType == wkbMultiPolygon)
{
OGRMultiPolygon *poMP = poGeom->toMultiPolygon();
if (ScanAheadForHole())
{
// Add a hole to the current polygon.
poMP->getGeometryRef(poMP->getNumGeometries() - 1)
->addRingDirectly(new OGRLinearRing());
}
else if (!NextIsFeature())
{
OGRPolygon *poPoly = new OGRPolygon();
poPoly->addRingDirectly(new OGRLinearRing());
poMP->addGeometryDirectly(poPoly);
}
else
break; /* done geometry */
}
else if (eType == wkbPolygon)
{
if (ScanAheadForHole())
poGeom->toPolygon()->addRingDirectly(new OGRLinearRing());
else
break; /* done geometry */
}
else if (eType == wkbMultiLineString && !NextIsFeature())
{
poGeom->toMultiLineString()->addGeometryDirectly(
new OGRLineString());
}
else if (poGeom != nullptr)
{
break;
}
else if (poFeatureDefn->GetGeomType() == wkbUnknown)
{
poFeatureDefn->SetGeomType(wkbLineString);
// bMultiVertex = true;
}
}
else if (osLine[0] == '#')
{
for (int i = 0;
papszKeyedValues != nullptr && papszKeyedValues[i] != nullptr;
i++)
{
if (papszKeyedValues[i][0] == 'D')
osFieldData = papszKeyedValues[i] + 1;
}
}
else
{
// Parse point line.
double dfX = 0.0;
double dfY = 0.0;
double dfZ = 0.0;
const int nDim = CPLsscanf(osLine, "%lf %lf %lf", &dfX, &dfY, &dfZ);
if (nDim >= 2)
{
if (poGeom == nullptr)
{
switch (poFeatureDefn->GetGeomType())
{
case wkbLineString:
poGeom = new OGRLineString();
break;
case wkbPolygon:
{
OGRPolygon *poPoly = new OGRPolygon();
poGeom = poPoly;
poPoly->addRingDirectly(new OGRLinearRing());
break;
}
case wkbMultiPolygon:
{
OGRPolygon *poPoly = new OGRPolygon();
poPoly->addRingDirectly(new OGRLinearRing());
OGRMultiPolygon *poMP = new OGRMultiPolygon();
poGeom = poMP;
poMP->addGeometryDirectly(poPoly);
}
break;
case wkbMultiPoint:
poGeom = new OGRMultiPoint();
break;
case wkbMultiLineString:
{
OGRMultiLineString *poMLS =
new OGRMultiLineString();
poGeom = poMLS;
poMLS->addGeometryDirectly(new OGRLineString());
break;
}
case wkbPoint:
case wkbUnknown:
default:
poGeom = new OGRPoint();
break;
}
}
CPLAssert(poGeom != nullptr);
// cppcheck-suppress nullPointerRedundantCheck
switch (wkbFlatten(poGeom->getGeometryType()))
{
case wkbPoint:
{
OGRPoint *poPoint = poGeom->toPoint();
poPoint->setX(dfX);
poPoint->setY(dfY);
if (nDim == 3)
poPoint->setZ(dfZ);
break;
}
case wkbLineString:
{
OGRLineString *poLS = poGeom->toLineString();
if (nDim == 3)
poLS->addPoint(dfX, dfY, dfZ);
else
poLS->addPoint(dfX, dfY);
break;
}
case wkbPolygon:
case wkbMultiPolygon:
{
OGRPolygon *poPoly = nullptr;
if (wkbFlatten(poGeom->getGeometryType()) ==
wkbMultiPolygon)
{
OGRMultiPolygon *poMP = poGeom->toMultiPolygon();
poPoly = poMP->getGeometryRef(
poMP->getNumGeometries() - 1);
}
else
poPoly = poGeom->toPolygon();
OGRLinearRing *poRing = nullptr;
if (poPoly->getNumInteriorRings() == 0)
poRing = poPoly->getExteriorRing();
else
poRing = poPoly->getInteriorRing(
poPoly->getNumInteriorRings() - 1);
if (nDim == 3)
poRing->addPoint(dfX, dfY, dfZ);
else
poRing->addPoint(dfX, dfY);
}
break;
case wkbMultiLineString:
{
OGRMultiLineString *poML = poGeom->toMultiLineString();
OGRLineString *poLine =
poML->getGeometryRef(poML->getNumGeometries() - 1);
if (nDim == 3)
poLine->addPoint(dfX, dfY, dfZ);
else
poLine->addPoint(dfX, dfY);
}
break;
default:
CPLAssert(false);
}
}
}
if (poGeom && wkbFlatten(poGeom->getGeometryType()) == wkbPoint)
{
ReadLine();
break;
}
}
if (poGeom == nullptr)
return nullptr;
/* -------------------------------------------------------------------- */
/* Create feature. */
/* -------------------------------------------------------------------- */
OGRFeature *poFeature = new OGRFeature(poFeatureDefn);
poGeom->assignSpatialReference(m_poSRS);
poFeature->SetGeometryDirectly(poGeom);
poFeature->SetFID(iNextFID++);
/* -------------------------------------------------------------------- */
/* Process field values. */
/* -------------------------------------------------------------------- */
char **papszFD = CSLTokenizeStringComplex(osFieldData, "|", TRUE, TRUE);
for (int iField = 0; papszFD != nullptr && papszFD[iField] != nullptr;
iField++)
{
if (iField >= poFeatureDefn->GetFieldCount())
break;
poFeature->SetField(iField, papszFD[iField]);
}
CSLDestroy(papszFD);
m_nFeaturesRead++;
return poFeature;
}
/************************************************************************/
/* CompleteHeader() */
/* */
/* Finish writing out the header with field definitions and the */
/* layer geometry type. */
/************************************************************************/
OGRErr OGRGmtLayer::CompleteHeader(OGRGeometry *poThisGeom)
{
/* -------------------------------------------------------------------- */
/* If we do not already have a geometry type, try to work one */
/* out and write it now. */
/* -------------------------------------------------------------------- */
if (poFeatureDefn->GetGeomType() == wkbUnknown && poThisGeom != nullptr)
{
poFeatureDefn->SetGeomType(wkbFlatten(poThisGeom->getGeometryType()));
const char *pszGeom = nullptr;
switch (wkbFlatten(poFeatureDefn->GetGeomType()))
{
case wkbPoint:
pszGeom = " @GPOINT";
break;
case wkbLineString:
pszGeom = " @GLINESTRING";
break;
case wkbPolygon:
pszGeom = " @GPOLYGON";
break;
case wkbMultiPoint:
pszGeom = " @GMULTIPOINT";
break;
case wkbMultiLineString:
pszGeom = " @GMULTILINESTRING";
break;
case wkbMultiPolygon:
pszGeom = " @GMULTIPOLYGON";
break;
default:
pszGeom = "";
break;
}
VSIFPrintfL(m_fp, "#%s\n", pszGeom);
}
/* -------------------------------------------------------------------- */
/* Prepare and write the field names and types. */
/* -------------------------------------------------------------------- */
CPLString osFieldNames;
CPLString osFieldTypes;
for (int iField = 0; iField < poFeatureDefn->GetFieldCount(); iField++)
{
if (iField > 0)
{
osFieldNames += "|";
osFieldTypes += "|";
}
osFieldNames += poFeatureDefn->GetFieldDefn(iField)->GetNameRef();
switch (poFeatureDefn->GetFieldDefn(iField)->GetType())
{
case OFTInteger:
osFieldTypes += "integer";
break;
case OFTReal:
osFieldTypes += "double";
break;
case OFTDateTime:
osFieldTypes += "datetime";
break;
default:
osFieldTypes += "string";
break;
}
}
if (poFeatureDefn->GetFieldCount() > 0)
{
VSIFPrintfL(m_fp, "# @N%s\n", osFieldNames.c_str());
VSIFPrintfL(m_fp, "# @T%s\n", osFieldTypes.c_str());
}
/* -------------------------------------------------------------------- */
/* Mark the end of the header, and start of feature data. */
/* -------------------------------------------------------------------- */
VSIFPrintfL(m_fp, "# FEATURE_DATA\n");
bHeaderComplete = true;
bRegionComplete = true; // no feature written, so we know them all!
return OGRERR_NONE;
}
/************************************************************************/
/* ICreateFeature() */
/************************************************************************/
OGRErr OGRGmtLayer::ICreateFeature(OGRFeature *poFeature)
{
if (!bUpdate)
{
CPLError(CE_Failure, CPLE_NoWriteAccess,
"Cannot create features on read-only dataset.");
return OGRERR_FAILURE;
}
/* -------------------------------------------------------------------- */
/* Do we need to write the header describing the fields? */
/* -------------------------------------------------------------------- */
if (!bHeaderComplete)
{
OGRErr eErr = CompleteHeader(poFeature->GetGeometryRef());
if (eErr != OGRERR_NONE)
return eErr;
}
/* -------------------------------------------------------------------- */
/* Write out the feature */
/* -------------------------------------------------------------------- */
OGRGeometry *poGeom = poFeature->GetGeometryRef();
if (poGeom == nullptr)
{
CPLError(CE_Failure, CPLE_AppDefined,
"Features without geometry not supported by GMT writer.");
return OGRERR_FAILURE;
}
if (poFeatureDefn->GetGeomType() == wkbUnknown)
poFeatureDefn->SetGeomType(wkbFlatten(poGeom->getGeometryType()));
// Do we need a vertex collection marker grouping vertices.
if (poFeatureDefn->GetGeomType() != wkbPoint)
VSIFPrintfL(m_fp, ">\n");
/* -------------------------------------------------------------------- */
/* Write feature properties() */
/* -------------------------------------------------------------------- */
if (poFeatureDefn->GetFieldCount() > 0)
{
CPLString osFieldData;
for (int iField = 0; iField < poFeatureDefn->GetFieldCount(); iField++)
{
OGRFieldType eFType =
poFeatureDefn->GetFieldDefn(iField)->GetType();
const char *pszRawValue = poFeature->GetFieldAsString(iField);
if (iField > 0)
osFieldData += "|";
// We do not want prefix spaces for numeric values.
if (eFType == OFTInteger || eFType == OFTReal)
while (*pszRawValue == ' ')
pszRawValue++;
if (strchr(pszRawValue, ' ') || strchr(pszRawValue, '|') ||
strchr(pszRawValue, '\t') || strchr(pszRawValue, '\n'))
{
osFieldData += "\"";
char *pszEscapedVal =
CPLEscapeString(pszRawValue, -1, CPLES_BackslashQuotable);
osFieldData += pszEscapedVal;
CPLFree(pszEscapedVal);
osFieldData += "\"";
}
else
osFieldData += pszRawValue;
}
VSIFPrintfL(m_fp, "# @D%s\n", osFieldData.c_str());
}
/* -------------------------------------------------------------------- */
/* Write Geometry */
/* -------------------------------------------------------------------- */
return WriteGeometry(OGRGeometry::ToHandle(poGeom), true);
}
/************************************************************************/
/* WriteGeometry() */
/* */
/* Write a geometry to the file. If bHaveAngle is true it */
/* means the angle bracket preceding the point stream has */
/* already been written out. */
/* */
/* We use the C API for geometry access because of its */
/* simplified access to vertices and children geometries. */
/************************************************************************/
OGRErr OGRGmtLayer::WriteGeometry(OGRGeometryH hGeom, bool bHaveAngle)
{
/* -------------------------------------------------------------------- */
/* This is a geometry with sub-geometries. */
/* -------------------------------------------------------------------- */
if (OGR_G_GetGeometryCount(hGeom) > 0)
{
OGRErr eErr = OGRERR_NONE;
for (int iGeom = 0;
iGeom < OGR_G_GetGeometryCount(hGeom) && eErr == OGRERR_NONE;
iGeom++)
{
// We need to emit polygon @P and @H items while we still
// know this is a polygon and which is the outer and inner
// ring.
if (wkbFlatten(OGR_G_GetGeometryType(hGeom)) == wkbPolygon)
{
if (!bHaveAngle)
{
VSIFPrintfL(m_fp, ">\n");
bHaveAngle = true;
}
if (iGeom == 0)
VSIFPrintfL(m_fp, "# @P\n");
else
VSIFPrintfL(m_fp, "# @H\n");
}
eErr =
WriteGeometry(OGR_G_GetGeometryRef(hGeom, iGeom), bHaveAngle);
bHaveAngle = false;
}
return eErr;
}
/* -------------------------------------------------------------------- */
/* If this is not a point we need to have an angle bracket to */
/* mark the vertex list. */
/* -------------------------------------------------------------------- */
if (wkbFlatten(OGR_G_GetGeometryType(hGeom)) != wkbPoint && !bHaveAngle)
VSIFPrintfL(m_fp, ">\n");
/* -------------------------------------------------------------------- */
/* Dump vertices. */
/* -------------------------------------------------------------------- */
const int nPointCount = OGR_G_GetPointCount(hGeom);
const int nDim = OGR_G_GetCoordinateDimension(hGeom);
// For testing only. Ticket #6453
const bool bUseTab =
CPLTestBool(CPLGetConfigOption("GMT_USE_TAB", "FALSE"));
for (int iPoint = 0; iPoint < nPointCount; iPoint++)
{
const double dfX = OGR_G_GetX(hGeom, iPoint);
const double dfY = OGR_G_GetY(hGeom, iPoint);
const double dfZ = OGR_G_GetZ(hGeom, iPoint);
sRegion.Merge(dfX, dfY);
char szLine[128];
OGRMakeWktCoordinate(szLine, dfX, dfY, dfZ, nDim);
if (bUseTab)
{
for (char *szPtr = szLine; *szPtr != '\0'; ++szPtr)
{
if (*szPtr == ' ')
*szPtr = '\t';
}
}
if (VSIFPrintfL(m_fp, "%s\n", szLine) < 1)
{
CPLError(CE_Failure, CPLE_FileIO, "Gmt write failure: %s",
VSIStrerror(errno));
return OGRERR_FAILURE;
}
}
return OGRERR_NONE;
}
/************************************************************************/
/* GetExtent() */
/* */
/* Fetch extent of the data currently stored in the dataset. */
/* The bForce flag has no effect on SHO files since that value */
/* is always in the header. */
/* */
/* Returns OGRERR_NONE/OGRRERR_FAILURE. */
/************************************************************************/
OGRErr OGRGmtLayer::GetExtent(OGREnvelope *psExtent, int bForce)
{
if (bRegionComplete && sRegion.IsInit())
{
*psExtent = sRegion;
return OGRERR_NONE;
}
return OGRLayer::GetExtent(psExtent, bForce);
}
/************************************************************************/
/* TestCapability() */
/************************************************************************/
int OGRGmtLayer::TestCapability(const char *pszCap)