foo.zig

const c = @cImport({
    @cInclude("ngx_config.h");
    @cInclude("ngx_core.h");
    @cInclude("ngx_string.h");
    @cInclude("ngx_http.h");
    @cInclude("ngx_event_openssl.h");
});

const ngx_foo_conf_t = extern struct {
    enable: c.ngx_flag_t,
};

// static void *
// ngx_foo_create_srv_conf(ngx_conf_t *cf) {
fn ngx_foo_create_srv_conf(cf: ?*c.ngx_conf_t) callconv(.C) ?*anyopaque {
    var conf: ?*c.ngx_foo_conf_t = c.ngx_pcalloc(cf.pool, @sizeOf(ngx_foo_conf_t));
    if (!conf) {
        return c.NGX_CONF_ERROR;
    }

    conf.enable = c.NGX_CONF_UNSET;
    return conf;  //??? @as(?*anyopaque, @ptrCast(conf));
}

// static char *
// ngx_foo_merge_srv_conf(ngx_conf_t *cf, void *parent, void *child) {
fn ngx_foo_merge_srv_conf(cf: ?*c.ngx_conf_t, parent: ?*anyopaque, child: ?*anyopaque) callconv(.C) *c.u8 {
    _ = cf;

    var prev: *c.ngx_foo_conf_t = @as(*c.ngx_foo_conf_t, @ptrCast(@alignCast(parent)));
    var conf: *c.ngx_foo_conf_t = @as(*c.ngx_foo_conf_t, @ptrCast(@alignCast(child)));

    c.ngx_conf_merge_value(conf.enable, prev.enable, 0);
    return c.NGX_CONF_OK;
}

// static ngx_int_t
// ngx_foo_variables(ngx_conf_t *cf) {
fn ngx_foo_variables(cf: ?*c.ngx_conf_t) callconv(.C) c.ngx_int_t {
    _ = cf;
    return c.NGX_OK;
}

// static ngx_int_t
// ngx_foo_init_module(ngx_cycle_t *cycle) {
fn ngx_foo_init_module(cycle: ?*c.ngx_cycle_t) callconv(.C) c.ngx_int_t {
    _ = cycle;
    return c.NGX_OK;
}

const ngx_foo_commands = c.ngx_command_t[2]{
    c.ngx_command_t{
        .name = c.ngx_string("foo_enable"),
        .type = c.NGX_HTTP_SRV_CONF | c.NGX_CONF_FLAG,
        .set = c.ngx_conf_set_flag_slot,
        .conf = c.NGX_HTTP_SRV_CONF_OFFSET,
        .offset = @offsetOf(ngx_foo_conf_t, "enable"),
        .post = c.NULL,
    },
    c.ngx_null_command,
};

const ngx_foo_module_ctx = c.ngx_http_module_t{
    .preconfiguration = ngx_foo_variables,
    .postconfiguration = c.NULL,
    .create_main_conf = c.NULL,
    .init_main_conf = c.NULL,
    .create_srv_conf = ngx_foo_create_srv_conf,
    .merge_srv_conf = ngx_foo_merge_srv_conf,
    .create_loc_conf = c.NULL,
    .merge_loc_conf = c.NULL,
};

export const ngx_foo_module: c.ngx_module_t = .{
    // .version = c.NGX_MODULE_V1,
    .version = @as(c.ngx_uint_t, @bitCast(@as(c_long, @as(c_int, 1025003)))),
    .signature = "8,4,8,1011000111010111011101111111111111",
    .ctx = &ngx_foo_module_ctx,
    .commands = ngx_foo_commands,
    .type = c.NGX_HTTP_MODULE,
    .init_master = c.NULL,
    .init_module = ngx_foo_init_module,
    .init_process = c.NULL,
    .init_thread = c.NULL,
    .exit_thread = c.NULL,
    .exit_process = c.NULL,
    .exit_master = c.NULL,
};