/* context.h 
 *	Copyright (C) 2000 Werner Koch (dd9jn)
 *      Copyright (C) 2001, 2002 g10 Code GmbH
 *
 * This file is part of GPGME.
 *
 * GPGME is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; either version 2 of the License, or
 * (at your option) any later version.
 *
 * GPGME is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA
 */

#ifndef CONTEXT_H
#define CONTEXT_H

#include "gpgme.h"
#include "types.h"
#include "engine.h"
#include "wait.h"

struct key_queue_item_s
{
  struct key_queue_item_s *next;
  GpgmeKey key;
};

struct trust_queue_item_s
{
  struct trust_queue_item_s *next;
  GpgmeTrustItem item;
};


/* Currently we need it at several places, so we put the definition 
 * into this header file */
struct gpgme_context_s
{
  int initialized;
  /* A gpg request is still pending.  */
  int pending;

  int use_cms;

  /* At some points we need to remember an error which we can't report
     immediately.  */
  GpgmeError error;
  /* Cancel operation requested.  */
  int cancel;

  /* The running engine process.  */
  EngineObject engine;

  /* Level of verbosity to use.  */
  int verbosity;
  int use_armor;  
  int use_textmode;
  int keylist_mode;
  int include_certs;

  /* The number of keys in signers.  */
  int signers_len;
  /* Size of the following array.  */
  int signers_size;
  GpgmeKey *signers;

  struct
  {
    VerifyResult verify;
    DecryptResult decrypt;
    SignResult sign;
    EncryptResult encrypt;
    PassphraseResult passphrase;
    ImportResult import;
    DeleteResult delete;
    GenKeyResult genkey;
    KeylistResult keylist;
    EditResult edit;
  } result;

  /* Last signature notation.  */
  GpgmeData notation;
  /* Last operation info.  */
  GpgmeData op_info;

  /* Used by keylist.c.  */
  GpgmeKey tmp_key;
  /* Something new is available.  */
  volatile int key_cond;
  struct key_queue_item_s *key_queue;
  struct trust_queue_item_s *trust_queue;

  GpgmePassphraseCb passphrase_cb;
  void *passphrase_cb_value;

  GpgmeProgressCb progress_cb;
  void *progress_cb_value;

  /* A list of file descriptors in active use by the current
     (synchronous) operation.  */
  struct fd_table fdt;
  struct GpgmeIOCbs io_cbs;
  
  GpgmeData help_data_1;
};


struct gpgme_data_s {
    size_t len;
    const char *data;
    GpgmeDataType type;
    GpgmeDataMode mode;
    GpgmeDataEncoding encoding;

    int (*read_cb)( void *, char *, size_t, size_t *);
    void *read_cb_value;
    int read_cb_eof;

    size_t readpos;
    size_t writepos;
    size_t private_len;
    char *private_buffer;
};

/* Forward declaration of a structure to store certification
   signatures. */
struct certsig_s;

/* Structure to store user IDs. */
struct user_id_s {
    struct user_id_s *next;
    unsigned int revoked:1;
    unsigned int invalid:1;
    GpgmeValidity validity; 
    struct certsig_s *certsigs;
    const char *name_part;    /* all 3 point into strings behind name */
    const char *email_part;   /* or to read-only strings */
    const char *comment_part;
    char name[1];
};

struct gpgme_recipients_s {
    struct user_id_s *list;
    int checked;   /* wether the recipients are all valid */
};


#define fail_on_pending_request(c)                            \
          do {                                                \
                if (!(c))         return GPGME_Invalid_Value; \
                if ((c)->pending) return GPGME_Busy;          \
             } while (0)

#define wait_on_request_or_fail(c)                            \
          do {                                                \
                if (!(c))          return GPGME_Invalid_Value;\
                if (!(c)->pending) return GPGME_No_Request;   \
                gpgme_wait ((c), 1);                          \
             } while (0)

#endif /* CONTEXT_H */