/*

 * nghttp2 - HTTP/2 C Library

 *

 * Copyright (c) 2012 Tatsuhiro Tsujikawa

 *

 * Permission is hereby granted, free of charge, to any person obtaining

 * a copy of this software and associated documentation files (the

 * "Software"), to deal in the Software without restriction, including

 * without limitation the rights to use, copy, modify, merge, publish,

 * distribute, sublicense, and/or sell copies of the Software, and to

 * permit persons to whom the Software is furnished to do so, subject to

 * the following conditions:

 *

 * The above copyright notice and this permission notice shall be

 * included in all copies or substantial portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND

 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE

 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 */

#include "nghttp2_outbound_item.h"

#include <assert.h>

#include <string.h>

nghttp2_data_provider_wrap *

nghttp2_data_provider_wrap_v1(nghttp2_data_provider_wrap *dpw,

                              const nghttp2_data_provider *data_prd) {

  if (!data_prd) {

    return NULL;

  }

  dpw->version = NGHTTP2_DATA_PROVIDER_V1;

  dpw->data_prd.v1 = *data_prd;

  return dpw;

}

nghttp2_data_provider_wrap *

nghttp2_data_provider_wrap_v2(nghttp2_data_provider_wrap *dpw,

                              const nghttp2_data_provider2 *data_prd) {

  if (!data_prd) {

    return NULL;

  }

  dpw->version = NGHTTP2_DATA_PROVIDER_V2;

  dpw->data_prd.v2 = *data_prd;

  return dpw;

}

int nghttp2_data_provider_wrap_contains_read_callback(

  const nghttp2_data_provider_wrap *dpw) {

  switch (dpw->version) {

  case NGHTTP2_DATA_PROVIDER_V1:

    return dpw->data_prd.v1.read_callback != NULL;

  case NGHTTP2_DATA_PROVIDER_V2:

    return dpw->data_prd.v2.read_callback != NULL;

  default:

    return 0;

  }

}

void nghttp2_outbound_item_init(nghttp2_outbound_item *item) {

  item->cycle = 0;

  item->qnext = NULL;

  item->queued = 0;

  memset(&item->aux_data, 0, sizeof(nghttp2_aux_data));

}

void nghttp2_outbound_item_free(nghttp2_outbound_item *item, nghttp2_mem *mem) {

  nghttp2_frame *frame;

  if (item == NULL) {

    return;

  }

  frame = &item->frame;

  switch (frame->hd.type) {

  case NGHTTP2_DATA:

    nghttp2_frame_data_free(&frame->data);

    break;

  case NGHTTP2_HEADERS:

    nghttp2_frame_headers_free(&frame->headers, mem);

    break;

  case NGHTTP2_PRIORITY:

    nghttp2_frame_priority_free(&frame->priority);

    break;

  case NGHTTP2_RST_STREAM:

    nghttp2_frame_rst_stream_free(&frame->rst_stream);

    break;

  case NGHTTP2_SETTINGS:

    nghttp2_frame_settings_free(&frame->settings, mem);

    break;

  case NGHTTP2_PUSH_PROMISE:

    nghttp2_frame_push_promise_free(&frame->push_promise, mem);

    break;

  case NGHTTP2_PING:

    nghttp2_frame_ping_free(&frame->ping);

    break;

  case NGHTTP2_GOAWAY:

    nghttp2_frame_goaway_free(&frame->goaway, mem);

    break;

  case NGHTTP2_WINDOW_UPDATE:

    nghttp2_frame_window_update_free(&frame->window_update);

    break;

  default: {

    nghttp2_ext_aux_data *aux_data;

    aux_data = &item->aux_data.ext;

    if (aux_data->builtin == 0) {

      nghttp2_frame_extension_free(&frame->ext);

      break;

    }

    switch (frame->hd.type) {

    case NGHTTP2_ALTSVC:

      nghttp2_frame_altsvc_free(&frame->ext, mem);

      break;

    case NGHTTP2_ORIGIN:

      nghttp2_frame_origin_free(&frame->ext, mem);

      break;

    case NGHTTP2_PRIORITY_UPDATE:

      nghttp2_frame_priority_update_free(&frame->ext, mem);

      break;

    default:

      assert(0);

      break;

    }

  }

  }

}

void nghttp2_outbound_queue_init(nghttp2_outbound_queue *q) {

  q->head = q->tail = NULL;

  q->n = 0;

}

void nghttp2_outbound_queue_push(nghttp2_outbound_queue *q,

                                 nghttp2_outbound_item *item) {

  if (q->tail) {

    q->tail = q->tail->qnext = item;

  } else {

    q->head = q->tail = item;

  }

  ++q->n;

}

void nghttp2_outbound_queue_pop(nghttp2_outbound_queue *q) {

  nghttp2_outbound_item *item;

  if (!q->head) {

    return;

  }

  item = q->head;

  q->head = q->head->qnext;

  item->qnext = NULL;

  if (!q->head) {

    q->tail = NULL;

  }

  --q->n;

}