namespace dataframe

// namespaces

namespace xf::data_analytics::dataframe::internal

// enums

enum TypeFlags

// structs

struct FieldInfo
struct Node
struct Object

csvParser

#include "xf_data_analytics/dataframe/csv_parser.hpp"

template <int PU_NUM = 8>
void csvParser (
    ap_uint <128>* csv_buf,
    ap_uint <8>* schema,
    hls::stream <Object>& o_obj_strm
    )

read one standard CSV file from DDR and parse into object stream with schma defination

Parameters:

PU_NUM	number of CSV parse core, only support 2/4/8
csv_buf	buffer of CSV file
schema	name, data type and is_filter flag for each column
o_obj_strm	output object stream for selected columns

jsonParser

#include "xf_data_analytics/dataframe/json_parser.hpp"

template <
    int PU_NUM = 4,
    int COL_NUM = 16
    >
void jsonParser (
    ap_uint <128>* json_buf,
    ap_uint <8>* schema,
    hls::stream <Object>& o_obj_strm
    )

read one standard JSON file from DDR and parse into object stream with schma defination

Parameters:

PU_NUM	number of JSON parse core, only support 2/4/8
COL_NUM	number of maximum column, should be power of 2
json_buf	buffer of JSON file
schema	name, data type and is_filter flag for each column
o_obj_strm	output object stream for selected columns

readFromDataFrame

#include "xf_data_analytics/dataframe/read_from_dataframe.hpp"

void readFromDataFrame (
    int field_type [17],
    ap_uint <64>* ddr_buff,
    hls::stream <Object>& obj_strm
    )

read the data frame format data from DDR and pack into object streams

Parameters:

field_type	the data type of each field id (may obtained from schema)
ddr_buff	the ddr that saves data
obj_strm	output Object stream

writeToDataFrame

#include "xf_data_analytics/dataframe/write_to_dataframe.hpp"

void writeToDataFrame (
    hls::stream <Object>& obj_strm,
    ap_uint <64>* ddr_buff
    )

write object stream data to DDR

all field_id in each json line is unique maximum supported field_id number is 16

Parameters:

obj_strm	input stream data with type Object Struct
ddr_buff	DDR buffer to save parserd data in DataFrame format