Function MakeArrayInterface

demo/c-api/basic/c-api-demo.c:25–31

Make Json encoded array interface. */

/* Make Json encoded array interface. */
static void MakeArrayInterface(size_t data, size_t n, char const* typestr, size_t length,
                               char* out) {
  static char const kTemplate[] =
      "{\"data\": [%lu, true], \"shape\": [%lu, %lu], \"typestr\": \"%s\", \"version\": 3}";
  memset(out, '\0', length);
  sprintf(out, kTemplate, data, n, 1ul, typestr);
}
/* Make Json encoded DMatrix configuration. */
static void MakeConfig(int n_threads, size_t length, char* out) {
  static char const kTemplate[] = "{\"missing\": NaN, \"nthread\": %d}";