Function rec_finalize

internal/cbm/sqlite_writer.c:400–424

Finalize: returns the complete record bytes (header_len + header + body). Caller must free the returned buffer.

// Finalize: returns the complete record bytes (header_len + header + body).
// Caller must free the returned buffer.
static uint8_t *rec_finalize(RecordBuilder *r, int *out_len) {
    *out_len = 0;
    int header_content_len = r->header.len;
    int header_len_varint_len = varint_len(header_content_len + varint_len(header_content_len));
    // The header size varint includes itself, so we may need to iterate
    int total_header = header_len_varint_len + header_content_len;
    // Check if the header_len varint changes size when it includes itself
    int recalc = varint_len(total_header);
    if (recalc != header_len_varint_len) {
        header_len_varint_len = recalc;
        total_header = header_len_varint_len + header_content_len;
    }

    int total = total_header + r->body.len;
    uint8_t *buf = (uint8_t *)malloc(total);
    if (!buf) {
        return NULL;
    }
    int pos = put_varint(buf, total_header);
    memcpy(buf + pos, r->header.data, header_content_len);
    pos += header_content_len;
    memcpy(buf + pos, r->body.data, r->body.len);
    *out_len = total;
    return buf;
}

// --- Page builder ---
// Accumulates cells (records) into B-tree leaf pages.