This repository contains the C code for a shared library that is used under the hood of TimeSeriesEcon.jl for reading and writing time series data in Julia.
From Julia simply install the TimeSeriesEcon package.
] add TimeSeriesEcon
In TimeSeriesEcon you will find the sub-module DataEcon.
Example:
using TimeSeriesEcon
DE = TimeSeriesEcon.DataEcon
message = DE.opendaec("example.daec") do de
DE.write_data(de, :message, "Hello World")
DE.read_data(de, :message)
end
show(message)If not using Julia, the rest of this file should help you to get started.
Use make to build the library and run the tests.
For example,
bash$ make libwill build the library bin/libdaec.so.
Similarly,
bash$ make testwill build a test application bin/test and run it.
Alternatively, you can simply download precompiled binaries for your machine from DataEcon_jll.
To build your own executable, compile it with #include "include/daec.h", and link it against lib/libdaec.so library.
For example:
// example.c
#include "daec.h"
#include <stdio.h>
#include <stdlib.h>
int main(void)
{
de_file de;
int rc;
rc = de_open("example.daec", &de);
if (rc != DE_SUCCESS)
{
fprintf(stderr, "Failed to open the file.\n");
return EXIT_FAILURE;
}
char message[] = "Hello World";
rc = de_store_scalar(de, 0, "message", type_string, freq_none,
sizeof message + 1, message, NULL);
if (rc != DE_SUCCESS)
{
fprintf(stderr, "Failed to write the message\n");
de_close(de);
return EXIT_FAILURE;
}
obj_id_t id;
rc = de_find_fullpath(de, "/message", &id);
if (rc != DE_SUCCESS)
{
fprintf(stderr, "Failed to find the message.\n");
de_close(de);
return EXIT_FAILURE;
}
scalar_t scalar;
rc = de_load_scalar(de, id, &scalar);
if (rc != DE_SUCCESS)
{
fprintf(stderr, "Failed to read the message.\n");
de_close(de);
return EXIT_FAILURE;
}
printf("%s\n", (char *)scalar.value);
de_close(de);
return EXIT_SUCCESS;
}bash$ gcc -I ./include -L lib -Wl,-rpath,$(pwd)/lib -ldaec example.c -o example
bash$ ./example
Hello World