Function pb_ensure_leaf_cap

internal/cbm/sqlite_writer.c:1053–1069

Ensure leaves array has capacity for one more entry. Returns false on allocation failure.

// Ensure leaves array has capacity for one more entry.
// Returns false on allocation failure.
static bool pb_ensure_leaf_cap(PageBuilder *pb) {
    if (pb->leaf_count < pb->leaf_cap) {
        return true;
    }
    pb->leaf_cap = pb->leaf_cap == 0 ? INITIAL_LEAF_CAP : pb->leaf_cap * GROWTH_FACTOR;
    void *tmp = realloc(pb->leaves, (size_t)pb->leaf_cap * sizeof(PageRef));
    if (!tmp) {
        /* Same consistent-empty contract as pb_flush_leaf's growth path. */
        free(pb->leaves);
        pb->leaves = NULL;
        pb->leaf_count = 0;
        pb->leaf_cap = 0;
        return false;
    }
    pb->leaves = (PageRef *)tmp;
    return true;
}

// SQLite overflow thresholds for leaf table B-tree pages (PAGE_SIZE=65536, reserved=0):
//   usable    = PAGE_SIZE = 65536