Function cbm_arena_sprintf

internal/cbm/arena.c:79–100

}

char *cbm_arena_sprintf(CBMArena *a, const char *fmt, ...) {
    // First pass: compute length
    va_list args;
    va_start(args, fmt);
    int needed = vsnprintf(NULL, 0, fmt, args);
    va_end(args);

    if (needed < 0) {
        return NULL;
    }

    char *dst = (char *)cbm_arena_alloc(a, (size_t)needed + SKIP_ONE);
    if (!dst) {
        return NULL;
    }

    va_start(args, fmt);
    vsnprintf(dst, (size_t)needed + SKIP_ONE, fmt, args);
    va_end(args);

    return dst;
}

void cbm_arena_destroy(CBMArena *a) {
    for (int i = 0; i < a->nblocks; i++) {