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/**
* To build this program, please make sure to reference linked library:
*
* gcc -lodccore -o odc-c-ls odc_ls.c
*/
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include "odc/api/odc.h"
#define CHECK_RESULT(x) \
do { \
int rc = (x); \
if (rc != ODC_SUCCESS) { \
fprintf(stderr, "Error calling odc function \"%s\": %s\n", #x, odc_error_string(rc)); \
exit(1); \
} \
} while (false);
void usage() {
fprintf(stderr, "Usage:\n");
fprintf(stderr, " odc-c-ls <odb2 file>\n\n");
}
void write_header(odc_frame_t* frame, int ncols) {
int col;
for (col = 0; col < ncols; ++col) {
const char* name;
int type;
int element_size;
int bitfield_count;
odc_frame_column_attributes(frame, col, &name, &type, &element_size, &bitfield_count);
int padding = element_size - floor(log10(abs(col + 1))) + 2;
fprintf(stdout, "%d. %-*s\t", col + 1, padding, name);
}
fprintf(stdout, "\n");
}
void write_bitfield(int64_t val, int nbits) {
int bit;
for (bit = nbits - 1; bit >= 0; --bit) {
fprintf(stdout, "%s", (val & (1 << bit)) ? "1" : "0");
}
}
void write_data(odc_decoder_t* decoder, odc_frame_t* frame, long nrows, int ncols) {
const void* data;
long width;
long height;
bool columnMajor;
CHECK_RESULT(odc_decoder_data_array(decoder, &data, &width, &height, &columnMajor));
const char* name;
int bitfield_count;
int column_types[ncols];
int column_offsets[ncols];
int column_sizes[ncols];
int column_bf_sizes[ncols];
long missing_integer;
double missing_double;
int current_offset = 0;
int col;
for (col = 0; col < ncols; ++col) {
CHECK_RESULT(
odc_frame_column_attributes(frame, col, &name, &column_types[col], &column_sizes[col], &bitfield_count));
column_offsets[col] = current_offset;
current_offset += column_sizes[col];
if (column_types[col] == ODC_BITFIELD) {
int bf;
for (bf = 0; bf < bitfield_count; ++bf) {
const char* bf_name;
int bf_offset;
int bf_size;
CHECK_RESULT(odc_frame_bitfield_attributes(frame, col, bf, &bf_name, &bf_offset, &bf_size));
if (bf == 0)
column_bf_sizes[col] = bf_size;
else
column_bf_sizes[col] += bf_size;
}
}
}
CHECK_RESULT(odc_missing_integer(&missing_integer));
CHECK_RESULT(odc_missing_double(&missing_double));
int row;
for (row = 0; row < nrows; row++) {
int col;
for (col = 0; col < ncols; col++) {
const void* value_p = &((const char*)data)[column_offsets[col] + (width * row)];
switch (column_types[col]) {
case ODC_INTEGER:
if (*(const int64_t*)value_p == missing_integer) {
fprintf(stdout, ".");
}
else {
fprintf(stdout, "%-*lld", column_sizes[col], *(const int64_t*)value_p);
}
break;
case ODC_BITFIELD:
if (*(const int64_t*)value_p == 0) {
fprintf(stdout, ".");
}
else {
write_bitfield(*(const int64_t*)value_p, column_bf_sizes[col]);
}
break;
case ODC_REAL:
case ODC_DOUBLE:
if (*(const double*)value_p == missing_double) {
fprintf(stdout, ".");
}
else {
fprintf(stdout, "%-*f", column_sizes[col], *(const double*)value_p);
}
break;
case ODC_STRING:
fprintf(stdout, "%-.*s", column_sizes[col], (const char*)value_p);
break;
default:
fprintf(stdout, "<unknown>");
break;
}
fprintf(stdout, "\t");
}
fprintf(stdout, "\n");
}
}
int main(int argc, char* argv[]) {
if (argc != 2) {
usage();
return 1;
}
char* path = argv[1];
CHECK_RESULT(odc_initialise_api()); // initialising api
CHECK_RESULT(odc_integer_behaviour(ODC_INTEGERS_AS_LONGS)); // change from default doubles
odc_reader_t* reader = NULL;
odc_frame_t* frame = NULL;
CHECK_RESULT(odc_open_path(&reader, path)); // opening path
CHECK_RESULT(odc_new_frame(&frame, reader)); // initialising frame
int rc;
long max_aggregated_rows = 1000000;
while ((rc = odc_next_frame_aggregated(frame, max_aggregated_rows)) == ODC_SUCCESS) {
int ncols;
CHECK_RESULT(odc_frame_column_count(frame, &ncols)); // getting column count
write_header(frame, ncols);
long nrows;
odc_decoder_t* decoder = NULL;
CHECK_RESULT(odc_new_decoder(&decoder)); // initialising decoder
CHECK_RESULT(odc_decoder_defaults_from_frame(decoder, frame)); // setting decoder structure
CHECK_RESULT(odc_decode(decoder, frame, &nrows)); // decoding data
write_data(decoder, frame, nrows, ncols);
CHECK_RESULT(odc_free_decoder(decoder)); // cleaning up decoder
}
if (rc != ODC_ITERATION_COMPLETE) {
fprintf(stderr, "Error: %s\n", odc_error_string(rc)); // unsuccessful end of frame iteration
return 1;
}
CHECK_RESULT(odc_free_frame(frame));
CHECK_RESULT(odc_close(reader)); // closing reader
return 0;
}
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