al::CSVReader Class Reference

The CSVReader class reads simple CSV files. More...

#include <C:/Users/Andres/source/repos/casm_viewer/external/tinc/external/allolib/include/al/io/al_CSVReader.hpp>

Public Types
enum	DataType {   STRING , REAL , INT64 , BOOLEAN ,   IGNORE_COLUMN }

Public Member Functions
bool	readFile (std::string fileName, bool hasColumnNames=true)
	readFile reads the CSV file into internal memory More...
void	addType (DataType type)
	addType More...
void	clearTypes ()
template<class DataStruct >
std::vector< DataStruct >	copyToStruct ()
	getColumn returns a column from the csv file More...
std::vector< double >	getColumn (int index)
	getColumn returns a column from the csv file More...
std::vector< std::string >	getColumnNames ()
	get names of the columns in CSV file More...
void	setBasePath (std::string basePath)

Protected Member Functions
size_t	calculateRowLength ()

Protected Attributes
const size_t	maxStringSize = 32
std::vector< std::string >	mColumnNames
std::vector< DataType >	mDataTypes
std::vector< char * >	mData
std::string	mBasePath

Detailed Description

The CSVReader class reads simple CSV files.

To use, first create a CSVReader object and call addType() to add the type of a column. Then call readFile().

Once the file is in memory it can be read as columns of floats using getColumn(). Or the whole CSV data can be copied to memory by defining a struct that will hold the values from each row from the csv file and calling copyToStruct() to create a vector with the data from the CSV file.

This reader is currently very naive (but efficient) and might choke with complex or malformed CSV files.

typedef struct {
    char s[32];
    double val1, val2, val3;
    bool b;
} RowTypes;
 
int main(int argc, char *argv[]) {
 
    CSVReader reader;
    reader.addType(CSVReader::STRING);
    reader.addType(CSVReader::REAL);
    reader.addType(CSVReader::REAL);
    reader.addType(CSVReader::REAL);
    reader.addType(CSVReader::BOOLEAN);
    reader.readFile("examples/csv/I13893-gm-21DIV-0001.csv");
 
    std::vector<RowTypes> rows = reader.copyToStruct<RowTypes>();
    for(auto row: rows) {
        std::cout << std::string(row.s) << " : "
                  << row.val1 << "   "
                  << row.val2 << "   "
                  << row.val3 << "   "
                  << (row.b ? "+" : "-")
                  << std::endl;
    }
 
    std::vector<double> column1 = reader.getColumn(1);
    for(auto value: column1) {
        std::cout << value << std::endl;
    }
    std::cout << " Num rows:" << rows.size() << std::endl;
    return 0;
}

Definition at line 111 of file al_CSVReader.hpp.

Member Function Documentation

addType()

void al::CSVReader::addType ( DataType  type )

inline

addType

Parameters

type

Definition at line 133 of file al_CSVReader.hpp.

copyToStruct()

template<class DataStruct >

std::vector<DataStruct> al::CSVReader::copyToStruct ( )

inline

getColumn returns a column from the csv file

Parameters

index

column index

Returns

vector with the data

Definition at line 143 of file al_CSVReader.hpp.

getColumn()

std::vector<double> al::CSVReader::getColumn

(

int

index

)

getColumn returns a column from the csv file

Parameters

index

column index

Returns

vector with the data

getColumnNames()

std::vector<std::string> al::CSVReader::getColumnNames ( )

inline

get names of the columns in CSV file

Returns

array with column names

Must be called after readFile(), otherwise an empty vector is returned.

Definition at line 173 of file al_CSVReader.hpp.

readFile()

bool al::CSVReader::readFile	(	std::string	fileName,
		bool	hasColumnNames = true
	)

readFile reads the CSV file into internal memory

Parameters

fileName	the csv file name
hasColumnNames	if true, the first line in the file is interpreted as column names

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The documentation for this class was generated from the following file:

• al_CSVReader.hpp