C++ CPLString::size方法代码示例

void CheckExtensionConsistency(const char* pszDestFilename,
                               const char* pszDriverName)
{

    CPLString osExt = CPLGetExtension(pszDestFilename);
    if (osExt.size())
    {
        GDALDriverH hThisDrv = GDALGetDriverByName(pszDriverName);
        if( hThisDrv != NULL && DoesDriverHandleExtension(hThisDrv, osExt) )
            return;

        int nDriverCount = GDALGetDriverCount();
        CPLString osConflictingDriverList;
        for(int i=0;i<nDriverCount;i++)
        {
            GDALDriverH hDriver = GDALGetDriver(i);
            if( hDriver != hThisDrv && DoesDriverHandleExtension(hDriver, osExt) )
            {
                if (osConflictingDriverList.size())
                    osConflictingDriverList += ", ";
                osConflictingDriverList += GDALGetDriverShortName(hDriver);
            }
        }
        if (osConflictingDriverList.size())
        {
            fprintf(stderr,
                    "Warning: The target file has a '%s' extension, which is normally used by the %s driver%s,\n"
                    "but the requested output driver is %s. Is it really what you want ?\n",
                    osExt.c_str(),
                    osConflictingDriverList.c_str(),
                    strchr(osConflictingDriverList.c_str(), ',') ? "s" : "",
                    pszDriverName);
        }
    }
}

int OGRDXFWriterLayer::WriteValue( int nCode, int nValue )

{
    CPLString osLinePair;

    osLinePair.Printf( "%3d\n%d\n", nCode, nValue );

    return VSIFWriteL( osLinePair.c_str(),
                       1, osLinePair.size(), fp ) == osLinePair.size();
}

/*
 * ExecuteSQL()
 */
OGRLayer *OGRNGWDataset::ExecuteSQL( const char *pszStatement,
    OGRGeometry *poSpatialFilter, const char *pszDialect )
{
    // Clean statement string.
    CPLString osStatement(pszStatement);
    osStatement = osStatement.Trim().replaceAll("  ", " ");

    if( STARTS_WITH_CI(osStatement.c_str(), "DELLAYER:") )
    {
        CPLString osLayerName = osStatement.substr(9);
        if( osLayerName.endsWith(";") )
        {
            osLayerName = osLayerName.substr(0, osLayerName.size() - 1);
            osLayerName.Trim();
        }

        CPLDebug("NGW", "Delete layer with name %s.", osLayerName.c_str());

        for( int iLayer = 0; iLayer < nLayers; ++iLayer )
        {
            if( EQUAL(papoLayers[iLayer]->GetName(), osLayerName.c_str() ) )
            {
                DeleteLayer( iLayer );
                break;
            }
        }
        return nullptr;
    }

    if( STARTS_WITH_CI(osStatement.c_str(), "DELETE FROM") )
    {
        // Get layer name from pszStatement DELETE FROM layer;.
        CPLString osLayerName = osStatement.substr(12);
        if( osLayerName.endsWith(";") )
        {
            osLayerName = osLayerName.substr(0, osLayerName.size() - 1);
            osLayerName.Trim();
        }

        CPLDebug("NGW", "Delete features from layer with name %s.", osLayerName.c_str());

        OGRNGWLayer *poLayer = static_cast<OGRNGWLayer*>(GetLayerByName(osLayerName));
        if( poLayer )
        {
            poLayer->DeleteAllFeatures();
        }
        else
        {
            CPLError(CE_Failure, CPLE_AppDefined, "Unknown layer : %s",
                osLayerName.c_str());
        }
        return nullptr;
    }
    return GDALDataset::ExecuteSQL(pszStatement, poSpatialFilter, pszDialect);
}

void CheckExtensionConsistency(const char* pszDestFilename,
                               const char* pszDriverName)
{

    char* pszDestExtension = CPLStrdup(CPLGetExtension(pszDestFilename));
    if (pszDestExtension[0] != '\0')
    {
        int nDriverCount = GDALGetDriverCount();
        CPLString osConflictingDriverList;
        for(int i=0;i<nDriverCount;i++)
        {
            GDALDriverH hDriver = GDALGetDriver(i);
            const char* pszDriverExtensions = 
                GDALGetMetadataItem( hDriver, GDAL_DMD_EXTENSIONS, NULL );
            if( pszDriverExtensions )
            {
                char** papszTokens = CSLTokenizeString( pszDriverExtensions );
                for(int j=0; papszTokens[j]; j++)
                {
                    const char* pszDriverExtension = papszTokens[j];
                    if (EQUAL(pszDestExtension, pszDriverExtension))
                    {
                        if (GDALGetDriverByName(pszDriverName) != hDriver)
                        {
                            if (osConflictingDriverList.size())
                                osConflictingDriverList += ", ";
                            osConflictingDriverList += GDALGetDriverShortName(hDriver);
                        }
                        else
                        {
                            /* If the request driver allows the used extension, then */
                            /* just stop iterating now */
                            osConflictingDriverList = "";
                            break;
                        }
                    }
                }
                CSLDestroy(papszTokens);
            }
        }
        if (osConflictingDriverList.size())
        {
            fprintf(stderr,
                    "Warning: The target file has a '%s' extension, which is normally used by the %s driver%s,\n"
                    "but the requested output driver is %s. Is it really what you want ?\n",
                    pszDestExtension,
                    osConflictingDriverList.c_str(),
                    strchr(osConflictingDriverList.c_str(), ',') ? "s" : "",
                    pszDriverName);
        }
    }

    CPLFree(pszDestExtension);
}

CPLString OGRCSVDataSource::GetRealExtension(CPLString osFilename)
{
    CPLString osExt = CPLGetExtension(osFilename);
    if( STARTS_WITH(osFilename, "/vsigzip/") && EQUAL(osExt, "gz") )
    {
        if( osFilename.size() > 7
            && EQUAL(osFilename + osFilename.size() - 7, ".csv.gz") )
            osExt = "csv";
        else if( osFilename.size() > 7
                 && EQUAL(osFilename + osFilename.size() - 7, ".tsv.gz") )
            osExt = "tsv";
    }
    return osExt;
}

static bool IsValidXPath(const CPLString& osXPath )
{
    // Check that the XPath syntax belongs to the subset we
    // understand
    bool bOK = !osXPath.empty();
    for(size_t i = 0; i < osXPath.size(); ++i )
    {
        const char chCur = osXPath[i];
        if( chCur == '/' )
        {
            // OK
        }
        else if( chCur == '@' &&
                 (i == 0 || osXPath[i-1] == '/') &&
                 i < osXPath.size()-1 &&
                 isalpha( static_cast<int>(osXPath[i+1]) ) )
        {
            // OK
        }
        else if( chCur == '_' ||
                    isalpha( static_cast<int>(chCur) ) )
        {
            // OK
        }
        else if( isdigit( static_cast<int>(chCur) ) &&
                    i > 0 &&
                    (isalnum( static_cast<int>(osXPath[i-1]) ) ||
                    osXPath[i-1] == '_') )
        {
            // OK
        }
        else if( chCur == ':' &&
                 i > 0 &&
                 (isalnum( static_cast<int>(osXPath[i-1]) ) ||
                  osXPath[i-1] == '_') &&
                 i < osXPath.size()-1 &&
                 isalpha( static_cast<int>(osXPath[i+1]) ) )
        {
            // OK
        }
        else
        {
            bOK = false;
            break;
        }
    }
    return bOK;
}

CPLString swq_expr_node::QuoteIfNecessary( const CPLString &osExpr,
                                           char chQuote )

{
    if( osExpr[0] == '_' )
        return Quote(osExpr, chQuote);
    if( osExpr == "*" )
        return osExpr;

    for( int i = 0; i < static_cast<int>(osExpr.size()); i++ )
    {
        char ch = osExpr[i];
        if( (!(isalnum(static_cast<int>(ch)) || ch == '_')) || ch == '.' )
        {
            return Quote(osExpr, chQuote);
        }
    }

    if( swq_is_reserved_keyword(osExpr) )
    {
        return Quote(osExpr, chQuote);
    }

    return osExpr;
}

int OGRSQLiteSelectLayer::TestCapability( const char * pszCap )

{
    if (EQUAL(pszCap,OLCFastSpatialFilter))
    {
        if (osSQLCurrent != osSQLBase)
            return TRUE;

        size_t i = 0;
        OGRSQLiteLayer* poBaseLayer = GetBaseLayer(i);
        if (poBaseLayer == NULL)
        {
            CPLDebug("SQLITE", "Cannot find base layer");
            return FALSE;
        }

        OGRPolygon oFakePoly;
        const char* pszWKT = "POLYGON((0 0,0 1,1 1,1 0,0 0))";
        oFakePoly.importFromWkt((char**) &pszWKT);
        CPLString    osSpatialWhere = poBaseLayer->GetSpatialWhere(&oFakePoly);

        return osSpatialWhere.size() != 0;
    }
    else
        return OGRSQLiteLayer::TestCapability( pszCap );
}

void GDALGMLJP2Expr::ReportError( const char* pszOriStr,
                                  const char* pszStr,
                                  const char* pszIntroMessage )
{
    size_t nDist = static_cast<size_t>(pszStr - pszOriStr);
    if( nDist > 40 )
        nDist = 40;
    CPLString osErrMsg(pszIntroMessage);
    CPLString osInvalidExpr = CPLString(pszStr - nDist).substr(0, nDist + 20);
    for( int i = static_cast<int>(nDist) - 1; i >= 0; --i )
    {
        if( osInvalidExpr[i] == '\n' )
        {
            osInvalidExpr = osInvalidExpr.substr(i+1);
            nDist -= i + 1;
            break;
        }
    }
    for( size_t i = nDist; i < osInvalidExpr.size(); ++i )
    {
        if( osInvalidExpr[i] == '\n' )
        {
            osInvalidExpr.resize(i);
            break;
        }
    }
    osErrMsg += osInvalidExpr;
    osErrMsg += "\n";
    for( size_t i = 0; i < nDist; ++i )
        osErrMsg += " ";
    osErrMsg += "^";
    CPLError(CE_Failure, CPLE_AppDefined, "%s", osErrMsg.c_str());
}

CPLString wxGISDataset::FixPathSeparator(CPLString &szPath)
{
	for(size_t i = 0; i < szPath.size(); ++i)
		if(szPath[i] == '/')
			szPath[i] = '\\';
    return szPath;
}

OGRErr OGRSQLiteTableLayer::ResetStatement()

{
    int rc;
    CPLString osSQL;

    ClearStatement();

    iNextShapeId = 0;

    osSQL.Printf( "SELECT _rowid_, * FROM '%s' %s",
                    pszEscapedTableName, 
                    osWHERE.c_str() );

    rc = sqlite3_prepare( poDS->GetDB(), osSQL, osSQL.size(),
		          &hStmt, NULL );

    if( rc == SQLITE_OK )
    {
	return OGRERR_NONE;
    }
    else
    {
        CPLError( CE_Failure, CPLE_AppDefined, 
                  "In ResetStatement(): sqlite3_prepare(%s):\n  %s", 
                  osSQL.c_str(), sqlite3_errmsg(poDS->GetDB()) );
        hStmt = NULL;
        return OGRERR_FAILURE;
    }
}

CPLString GetWorldFilePath(const CPLString &soPath)
{
    //1. thirst and last char from ext and third char set w (e.g. jpw)
    CPLString sExt = CPLGetExtension(soPath);
    CPLString sNewExt;
    sNewExt += sExt[0];
    sNewExt += sExt[sExt.size() - 1];
    sNewExt += 'w';
    CPLString szPath = (char*)CPLResetExtension(soPath, sNewExt);
	if(CPLCheckForFile((char*)szPath.c_str(), NULL))
		return szPath;
    //4. add wx to ext
    sNewExt += 'x';
    szPath = (char*)CPLResetExtension(soPath, sNewExt);
	if(CPLCheckForFile((char*)szPath.c_str(), NULL))
		return szPath;
    //2. wld
    szPath = (char*)CPLResetExtension(soPath, "wld");
    if(CPLCheckForFile((char*)szPath.c_str(), NULL))
		return szPath;
    //3. add w to ext
    szPath = soPath + CPLString("w");
    if(CPLCheckForFile((char*)szPath.c_str(), NULL))
		return szPath;
    return CPLString();
}

CPLString OGRAmigoCloudResultLayer::GetSRS_SQL(const char* pszGeomCol)
{
    CPLString osSQL;
    CPLString osLimitedSQL;

    size_t nPos = osBaseSQL.ifind(" LIMIT ");
    if( nPos != std::string::npos )
    {
        osLimitedSQL = osBaseSQL;
        size_t nSize = osLimitedSQL.size();
        for(size_t i = nPos + strlen(" LIMIT "); i < nSize; i++)
        {
            if( osLimitedSQL[i] == ' ' && osLimitedSQL[i-1] == '0')
            {
                osLimitedSQL[i-1] = '1';
                break;
            }
            osLimitedSQL[i] = '0';
        }
    }
    else
        osLimitedSQL.Printf("%s LIMIT 1", osBaseSQL.c_str());

    /* Assuming that the SRID of the first non-NULL geometry applies */
    /* to geometries of all rows. */
    osSQL.Printf("SELECT srid, srtext FROM spatial_ref_sys WHERE srid IN "
                "(SELECT ST_SRID(%s) FROM (%s) ogr_subselect)",
                OGRAMIGOCLOUDEscapeIdentifier(pszGeomCol).c_str(),
                osLimitedSQL.c_str());

    return osSQL;
}

void OGRSQLiteViewLayer::BuildWhere()

{
    osWHERE = "";

    CPLString osSpatialWHERE = GetSpatialWhere(m_poFilterGeom);
    if (osSpatialWHERE.size() != 0)
    {
        osWHERE = "WHERE ";
        osWHERE += osSpatialWHERE;
    }

    if( osQuery.size() > 0 )
    {
        if( osWHERE.size() == 0 )
        {
            osWHERE = "WHERE ";
            osWHERE += osQuery;
        }
        else
        {
            osWHERE += " AND (";
            osWHERE += osQuery;
            osWHERE += ")";
        }
    }
}

// This is a performance critical function, especially on geosciml schemas,
// and we make careful to not do any string copy or other memory allocation
// in it.
bool GMLASXPathMatcher::MatchesRefXPath(
                        const CPLString& osXPath,
                        const std::vector<XPathComponent>& oRefXPath) const
{
    size_t iPos = 0;
    size_t iIdxInRef = 0;

    bool bDirectChild = oRefXPath[0].m_bDirectChild;
    while( iPos < osXPath.size() && iIdxInRef < oRefXPath.size() )
    {
        bDirectChild = oRefXPath[iIdxInRef].m_bDirectChild;
        size_t iPosNextSlash = osXPath.find('/', iPos);

        bool bNodeMatch;
        if( iPosNextSlash == std::string::npos )
        {
            bNodeMatch = osXPath.compare(iPos, std::string::npos,
                                         oRefXPath[iIdxInRef].m_osValue) == 0;
        }
        else
        {
            bNodeMatch = osXPath.compare(iPos, iPosNextSlash - iPos,
                                         oRefXPath[iIdxInRef].m_osValue) == 0;
        }

        if( !bNodeMatch )
        {
            if( bDirectChild )
                return false;

            if( iPosNextSlash == std::string::npos )
                return false;
            iPos = iPosNextSlash + 1;
            continue;
        }

        if( iPosNextSlash == std::string::npos )
            iPos = osXPath.size();
        else
            iPos = iPosNextSlash + 1;
        iIdxInRef ++;
        bDirectChild = true;
    }

    return (!bDirectChild || iPos == osXPath.size()) &&
            iIdxInRef == oRefXPath.size();
}