C++ rstr_release函数代码示例

/**
 * Load a view file and do lexographical parsing
 *
 * Returns pointer to last token, or NULL if an error occured.
 * If an error occured 'ei' will be filled with data
 */
token_t *
glw_view_load1(glw_root_t *gr, rstr_t *url, errorinfo_t *ei, token_t *prev,
               int may_unlock)
{
  token_t *last;
  char errbuf[256];

  rstr_t *p = fa_absolute_path(url, prev->file);

  if(may_unlock)
    glw_unlock(gr);

  buf_t *b = fa_load(rstr_get(p),
                     FA_LOAD_VPATHS(gr->gr_vpaths),
                     FA_LOAD_ERRBUF(errbuf, sizeof(errbuf)),
                     NULL);

  if(may_unlock)
    glw_lock(gr);

  if(b == NULL) {
    snprintf(ei->error, sizeof(ei->error), "Unable to open \"%s\" -- %s",
	     rstr_get(p), errbuf);
    snprintf(ei->file,  sizeof(ei->file),  "%s", rstr_get(prev->file));
    ei->line = prev->line;
    rstr_release(p);
    return NULL;
  }

  last = glw_view_lexer(gr, buf_cstr(b), ei, p, prev);
  buf_release(b);
  rstr_release(p);
  return last;
}

void
jpeg_info_clear(jpeginfo_t *ji)
{
  if(ji->ji_thumbnail != NULL)
    pixmap_release(ji->ji_thumbnail);
  rstr_release(ji->ji_manufacturer);
  rstr_release(ji->ji_equipment);
}

static int
sidfile_scandir(fa_dir_t *fd, const char *url, char *errbuf, size_t errlen)
{
  void *fh = NULL;
  char *p, *fpath = mystrdupa(url);
  char buf[128];
  char name[32];
  char turl[URL_MAX];
  int tracks, i;
  fa_dir_entry_t *fde;
  rstr_t *album, *artist;
 

  if((p = strrchr(fpath, '/')) == NULL) {
    snprintf(errbuf, errlen, "Invalid filename");
    return -1;
  }

  *p = 0;
  if((fh = fa_open(fpath, errbuf, errlen)) == NULL)
    return -1;

  if(fa_read(fh, buf, 128) != 128) {
    snprintf(errbuf, errlen, "Unable to read file");
    fa_close(fh);
    return -1;
  }

  album = rstr_alloc(utf8_from_bytes((char *)buf + 0x16, 32, NULL));
  artist = rstr_alloc(utf8_from_bytes((char *)buf + 0x36, 32, NULL));

  tracks = buf[0xf];
  for(i = 0; i < tracks; i++) {

    snprintf(name, sizeof(name), "Track %02d", i + 1);
    snprintf(turl, sizeof(turl), "sidplayer:%s/%d", fpath, i + 1);
    fde = fa_dir_add(fd, turl, name, CONTENT_AUDIO);

    fde->fde_probestatus = FDE_PROBE_DEEP;

    fde->fde_metadata = prop_create_root("metadata");
    prop_set_string(prop_create(fde->fde_metadata, "title"), name);
    prop_set_rstring(prop_create(fde->fde_metadata, "album"), album);
    prop_set_rstring(prop_create(fde->fde_metadata, "artist"), artist);
  }

  rstr_release(album);
  rstr_release(artist);

  fa_close(fh);
  return 0;
}

static void
ns_val_clr(nls_string_t *ns)
{
  if(ns->ns_values == 1) {
    rstr_release(ns->ns_u.rstr);
    ns->ns_u.rstr = NULL;
  } else if(ns->ns_values > 1) {
    int i;
    for(i = 0; i < ns->ns_values; i++)
      rstr_release(ns->ns_u.vec[i]);
    free(ns->ns_u.vec);
    ns->ns_u.vec = NULL;
  }
  ns->ns_values = 0;
}

int
search_class_create(prop_t *parent, prop_t **nodesp, prop_t **entriesp,
                    const char *title, const char *icon)
{
    prop_t *p = prop_create_root(NULL);
    prop_t *m = prop_create(p, "metadata");
    prop_t *n, *e;

    rstr_t *url = backend_prop_make(p, NULL);
    prop_set_rstring(prop_create(p, "url"), url);
    rstr_release(url);

    prop_set_string(prop_create(m, "title"), title);
    if(icon != NULL)
        prop_set_string(prop_create(m, "icon"), icon);
    prop_set_string(prop_create(p, "type"), "directory");

    n = prop_create(p, "nodes");
    e = prop_create(p, "entries");
    prop_set_int(e, 0);

    *nodesp = prop_ref_inc(n);
    *entriesp = prop_ref_inc(e);

    if(prop_set_parent(p, parent)) {
        prop_destroy(p);
        return 1;
    }
    return 0;
}

static int
set_path(glw_view_eval_context_t *ec, const token_attrib_t *a,
	 struct token *t)
{
  glw_t *w = ec->w;

  rstr_t *r;

  void (*fn)(glw_t *w, rstr_t *r) = a->fn;

  switch(t->type) {
  case TOKEN_VOID:
    fn(w, NULL);
    return 0;

  case TOKEN_RSTRING:
  case TOKEN_LINK:
    r = t->t_rstring;
    break;

  default:
    return glw_view_seterr(ec->ei, t, 
			    "Attribute '%s' expects a string or scalar not %s",
			   a->name, token2name(t));
  }

  r = fa_absolute_path(r, t->file);
  fn(w, r);
  rstr_release(r);
  return 0;
}

/**
 * Try to open the given URL with a playqueue context
 */
static int
file_open_audio(prop_t *page, const char *url)
{
  char parent[URL_MAX];
  char parent2[URL_MAX];
  struct fa_stat fs;
  prop_t *model;

  if(fa_parent(parent, sizeof(parent), url))
    return 1;

  if(fa_stat(parent, &fs, NULL, 0))
    return 1;
  
  model = prop_create(page, "model");
  prop_set_string(prop_create(model, "type"), "directory");

  /* Find a meaningful page title (last component of URL) */
  rstr_t *title = title_from_url(parent);
  prop_setv(model, "metadata", "title", NULL, PROP_SET_RSTRING, title);

  // Set parent
  if(!fa_parent(parent2, sizeof(parent2), parent))
    prop_set_string(prop_create(page, "parent"), parent2);

  fa_scanner_page(parent, fs.fs_mtime, model, url,
                  prop_create(page, "directClose"), title);
  rstr_release(title);
  return 0;
}

static void
event_prop_action_dtor(event_t *e)
{
  event_prop_action_t *epa = (event_prop_action_t *)e;
  prop_ref_dec(epa->p);
  rstr_release(epa->action);
}

static rstr_t *
ffmpeg_metadata_rstr(AVMetadata *m, const char *key)
{
  AVMetadataTag *tag;
  int len;
  rstr_t *ret;
  const char *str;
  char *d;

  if((tag = av_metadata_get(m, key, NULL, AV_METADATA_IGNORE_SUFFIX)) == NULL)
    return NULL;

  if(!utf8_verify(tag->value))
    return NULL;

  str = tag->value;
  len = strlen(str);
  ret = rstr_allocl(str, len);
  d = rstr_data(ret);

  while(len > 0) {
    len--;
    if(d[len] <= ' ' || d[len] == '-')
      d[len] = 0;
    else
      break;
  }
  if(*d == 0 || !strncasecmp(d, "http://", 7)) {
    rstr_release(ret);
    return NULL;
  }
  return ret;
}

static int
is_plugin_blacklisted(const char *id, const char *version, rstr_t **reason)
{
  char tmp[512];
  int verint = parse_version_int(version);
  if(!strcmp(id, "custombg")) {
    if(reason != NULL) {
      *reason =
        _("Custom backgrounds can now be set in Settings -> Look and Feel");
    }
    return 1;
  }

  for(int i = 0; i < ARRAYSIZE(blacklist); i++) {
    if(strcmp(id, blacklist[i].id))
      continue;

    if(verint >= blacklist[i].version)
      continue;

    if(reason != NULL) {
      rstr_t *f = _("Version %s is no longer compatible with Movian");
      snprintf(tmp, sizeof(tmp), rstr_get(f), version);
      rstr_release(f);
      *reason = rstr_alloc(tmp);
    }
    return 1;
  }
  return 0;
}

static int
set_alt(glw_view_eval_context_t *ec, const token_attrib_t *a,
	struct token *t)
{
  glw_t *w = ec->w;

  rstr_t *r;

  switch(t->type) {
  default:
    if(w->glw_class->gc_set_alt != NULL)
      w->glw_class->gc_set_alt(w, NULL);
    return 0;

  case TOKEN_RSTRING:
    r = t->t_rstring;
    break;
  case TOKEN_LINK:
    r = t->t_link_rurl;
    break;
  }

  r = fa_absolute_path(r, t->file);

  if(w->glw_class->gc_set_alt != NULL)
    w->glw_class->gc_set_alt(w, r);
  rstr_release(r);
  return 0;
}

static void
news_sink(void *opaque, prop_event_t event, ...)
{
  prop_t *p = opaque;
  event_t *e;
  va_list ap;

  va_start(ap, event);

  switch(event) {
  case PROP_DESTROYED:
    prop_unsubscribe(va_arg(ap, prop_sub_t *));
    prop_ref_dec(p);
    break;

  case PROP_EXT_EVENT:
    e = va_arg(ap, event_t *);
    if(event_is_type(e, EVENT_DYNAMIC_ACTION)) {
      const event_payload_t *ep = (const event_payload_t *)e;
      if(!strcmp(ep->payload, "dismiss")) {
	rstr_t *id = prop_get_string(p, "id", NULL);
	dismis_news(rstr_get(id));
	rstr_release(id);
	prop_destroy(opaque);
      }
    }
    break;

  default:
    break;
  }
  va_end(ap);
}

static int
hc_prop(http_connection_t *hc, const char *remain, void *opaque,
        http_cmd_t method)
{
    htsbuf_queue_t out;
    rstr_t *r;
    int rval, i;
    prop_t *p;
    const char *action = http_arg_get_req(hc, "action");

    if(remain == NULL)
        return 404;

    p = prop_from_path(remain);

    if(p == NULL)
        return 404;

    htsbuf_queue_init(&out, 0);

    switch(method) {
    case HTTP_CMD_GET:

        if(action != NULL) {
            event_t *e = event_create_action_str(action);
            prop_send_ext_event(p, e);
            event_release(e);
            rval = HTTP_STATUS_OK;
            break;
        }

        r = prop_get_string(p, NULL);

        if(r == NULL) {

            char **childs = prop_get_name_of_childs(p);
            if(childs == NULL) {
                rval = HTTP_STATUS_UNSUPPORTED_MEDIA_TYPE;
                break;
            }
            for(i = 0; childs[i] != NULL; i++) {
                htsbuf_qprintf(&out, "\t%s\n", childs[i]);
            }
        } else {
            htsbuf_append(&out, rstr_get(r), strlen(rstr_get(r)));
            htsbuf_append(&out, "\n", 1);
            rstr_release(r);
        }
        rval = http_send_reply(hc, 0, "text/ascii", NULL, NULL, 0, &out);
        break;

    default:
        rval = HTTP_STATUS_METHOD_NOT_ALLOWED;
        break;
    }

    prop_ref_dec(p);

    return rval;
}

static void
set_source(glw_t *w, rstr_t *filename)
{
  glw_image_t *gi = (glw_image_t *)w;
  
  const rstr_t *curname;

  if(gi->gi_pending_url != NULL)
    curname = gi->gi_pending_url;
  else if(gi->gi_pending != NULL) 
    curname = gi->gi_pending->glt_url;
  else if(gi->gi_current != NULL) 
    curname = gi->gi_current->glt_url;
  else 
    curname = NULL;
  
  if(curname != NULL && filename != NULL && !strcmp(rstr_get(filename),
						    rstr_get(curname)))
    return;
  
  if(gi->gi_pending_url != NULL)
    rstr_release(gi->gi_pending_url);
  
  gi->gi_pending_url = filename ? rstr_dup(filename) : rstr_alloc("");
}

static void 
callback_opt(void *opaque, prop_event_t event, ...)
{
  setting_t *s = opaque;
  prop_callback_string_t *cb;
  prop_t *c;
  rstr_t *name;
  va_list ap;
  va_start(ap, event);

  cb = s->s_callback;

  if(event != PROP_SELECT_CHILD)
    return;

  c = va_arg(ap, prop_t *);

  name = c ? prop_get_name(c) : NULL;
  va_end(ap);

  if(cb != NULL)
    cb(s->s_opaque, rstr_get(name));

  if(s->s_store != NULL && s->s_saver != NULL) {
    htsmsg_delete_field(s->s_store, s->s_id);
    if(name != NULL)
      htsmsg_add_str(s->s_store, s->s_id, rstr_get(name));
    s->s_saver(s->s_saver_opaque, s->s_store);
  }
  rstr_release(name);
}