size_t ra_portable_serialize(roaring_array_t *ra, char *buf) {
assert(!IS_BIG_ENDIAN); // not implemented
char *initbuf = buf;
uint32_t startOffset = 0;
bool hasrun = ra_has_run_container(ra);
if (hasrun) {
uint32_t cookie = SERIAL_COOKIE | ((ra->size - 1) << 16);
memcpy(buf, &cookie, sizeof(cookie));
buf += sizeof(cookie);
uint32_t s = (ra->size + 7) / 8;
uint8_t *bitmapOfRunContainers = calloc(s, 1);
assert(bitmapOfRunContainers != NULL); // todo: handle
for (int32_t i = 0; i < ra->size; ++i) {
if (get_container_type(ra->containers[i],ra->typecodes[i])
== RUN_CONTAINER_TYPE_CODE) {
bitmapOfRunContainers[i / 8] |= (1 << (i % 8));
}
}
memcpy(buf, bitmapOfRunContainers, s);
buf += s;
free(bitmapOfRunContainers);
if (ra->size < NO_OFFSET_THRESHOLD) {
startOffset = 4 + 4 * ra->size + s;
} else {
startOffset = 4 + 8 * ra->size + s;
}
} else { // backwards compatibility
uint32_t cookie = SERIAL_COOKIE_NO_RUNCONTAINER;
memcpy(buf, &cookie, sizeof(cookie));
buf += sizeof(cookie);
memcpy(buf, &ra->size, sizeof(ra->size));
buf += sizeof(ra->size);
startOffset = 4 + 4 + 4 * ra->size + 4 * ra->size;
}
for (int32_t k = 0; k < ra->size; ++k) {
memcpy(buf, &ra->keys[k], sizeof(ra->keys[k]));
buf += sizeof(ra->keys[k]);
uint16_t card =
container_get_cardinality(ra->containers[k], ra->typecodes[k]) - 1;
memcpy(buf, &card, sizeof(card));
buf += sizeof(card);
}
if ((!hasrun) || (ra->size >= NO_OFFSET_THRESHOLD)) {
// writing the containers offsets
for (int32_t k = 0; k < ra->size; k++) {
memcpy(buf, &startOffset, sizeof(startOffset));
buf += sizeof(startOffset);
startOffset =
startOffset +
container_size_in_bytes(ra->containers[k], ra->typecodes[k]);
}
}
for (int32_t k = 0; k < ra->size; ++k) {
buf += container_write(ra->containers[k], ra->typecodes[k], buf);
}
return buf - initbuf;
}
static ssize_t data_container_t_write(data_t *data, fastcall_write *fargs){ // {{{
if(data->ptr == NULL)
return -EINVAL;
return container_write(
(container_t *)data->ptr,
fargs->offset,
fargs->buffer,
fargs->buffer_size,
&fargs->buffer_size
);
} // }}}
