text: /* Copyright (c) 2016, Google Inc.
   *
   * Permission to use, copy, modify, and/or distribute this software for any
   * purpose with or without fee is hereby granted, provided that the above
   * copyright notice and this permission notice appear in all copies.
   *
   * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
   * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
   * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
   * SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
   * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
   * OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
   * CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */
  
  #include <openssl/obj.h>
  
  #include <assert.h>
  #include <string.h>
  
  #include <openssl/evp.h>
  
  
  struct wrapped_callback {
    void (*callback)(const OBJ_NAME *, void *arg);
    void *arg;
  };
  
  static void cipher_callback(const EVP_CIPHER *cipher, const char *name,
                              const char *unused, void *arg) {
    const struct wrapped_callback *wrapped = (struct wrapped_callback *)arg;
    OBJ_NAME obj_name;
  
    memset(&obj_name, 0, sizeof(obj_name));
    obj_name.type = OBJ_NAME_TYPE_CIPHER_METH;
    obj_name.name = name;
  
    wrapped->callback(&obj_name, wrapped->arg);
  }
  
  static void md_callback(const EVP_MD *md, const char *name, const char *unused,
                          void *arg) {
    const struct wrapped_callback *wrapped = (struct wrapped_callback*) arg;
    OBJ_NAME obj_name;
  
    memset(&obj_name, 0, sizeof(obj_name));
    obj_name.type = OBJ_NAME_TYPE_MD_METH;
    obj_name.name = name;
  
    wrapped->callback(&obj_name, wrapped->arg);
  }
  
  void OBJ_NAME_do_all_sorted(int type,
                              void (*callback)(const OBJ_NAME *, void *arg),
                              void *arg) {
    struct wrapped_callback wrapped;
    wrapped.callback = callback;
    wrapped.arg = arg;
  
    if (type == OBJ_NAME_TYPE_CIPHER_METH) {
      EVP_CIPHER_do_all_sorted(cipher_callback, &wrapped);
    } else if (type == OBJ_NAME_TYPE_MD_METH) {
      EVP_MD_do_all_sorted(md_callback, &wrapped);
    } else {
      assert(0);
    }
  }
  
  void OBJ_NAME_do_all(int type, void (*callback)(const OBJ_NAME *, void *arg),
                       void *arg) {
    OBJ_NAME_do_all_sorted(type, callback, arg);
  }
  