Function cbm_arena_init

internal/cbm/arena.c:7–14

#include <stdio.h>

void cbm_arena_init(CBMArena *a) {
    memset(a, 0, sizeof(*a));
    a->block_size = CBM_ARENA_DEFAULT_BLOCK_SIZE;
    a->blocks[0] = (char *)malloc(a->block_size);
    if (a->blocks[0]) {
        a->nblocks = SKIP_ONE;
    }
}

static int arena_grow(CBMArena *a, size_t min_size) {
    if (a->nblocks >= CBM_ARENA_MAX_BLOCKS) {