SemanticInformation.h


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/*
    This file is part of cpp-ethereum.

    cpp-ethereum 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 3 of the License, or
    (at your option) any later version.

    cpp-ethereum 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 cpp-ethereum.  If not, see <http://www.gnu.org/licenses/>.
*/
/**
 * @file SemanticInformation.h
 * @author Christian <c@ethdev.com>
 * @date 2015
 * Helper to provide semantic information about assembly items.
 */

#pragma once


namespace dev
{
namespace eth
{

class AssemblyItem;

/**
 * Helper functions to provide context-independent information about assembly items.
 */
struct SemanticInformation
{
    /// @returns true if the given items starts a new block for common subexpression analysis.
    static bool breaksCSEAnalysisBlock(AssemblyItem const& _item);
    /// @returns true if the item is a two-argument operation whose value does not depend on the
    /// order of its arguments.
    static bool isCommutativeOperation(AssemblyItem const& _item);
    static bool isDupInstruction(AssemblyItem const& _item);
    static bool isSwapInstruction(AssemblyItem const& _item);
    static bool isJumpInstruction(AssemblyItem const& _item);
    static bool altersControlFlow(AssemblyItem const& _item);
};

}
}
/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 8; tab-width: 8 -*- */
/* e-corba-storage-registry.c
 *
 * Copyright (C) 2000  Ximian, Inc.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of version 2 of the GNU General Public
 * License as published by the Free Software Foundation.
 *
 * This program 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.
 *
 * Author: Ettore Perazzoli
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include "e-local-storage.h"
#include "e-corba-storage.h"
#include "e-corba-storage-registry.h"
#include "e-shell-constants.h"

#include "e-util/e-corba-utils.h"

#include <bonobo/bonobo-exception.h>
#include <gal/util/e-util.h>

#include <string.h>


#define PARENT_TYPE BONOBO_OBJECT_TYPE
static BonoboObjectClass *parent_class = NULL;

struct _ECorbaStorageRegistryPrivate {
    EStorageSet *storage_set;

    GSList *listeners;
};


/* CORBA interface implementation.  */

static void
listener_notify (Bonobo_Listener listener,
         GNOME_Evolution_StorageRegistry_MessageType type,
         const char *name)
{
    CORBA_any any;
    GNOME_Evolution_StorageRegistry_NotifyResult nr;
    CORBA_Environment ev;
    
    nr.type = type;
    nr.name = CORBA_string_dup (name ? name : "");

    any._type = (CORBA_TypeCode) TC_GNOME_Evolution_StorageRegistry_NotifyResult;
    any._value = &nr;

    CORBA_exception_init (&ev);
    Bonobo_Listener_event (listener,
                   "Evolution::StorageRegistry::NotifyResult",
                   &any, &ev);
    if (BONOBO_EX (&ev)) {
        g_warning ("Could not send notify event for %s\n%s", name,
               CORBA_exception_id (&ev));
    }

    CORBA_exception_free (&ev);
}

static GNOME_Evolution_StorageListener
impl_StorageRegistry_addStorage (PortableServer_Servant servant,
                 const GNOME_Evolution_Storage storage_interface,
                 const CORBA_char *name,
                 CORBA_Environment *ev)
{
    BonoboObject *bonobo_object;
    ECorbaStorageRegistry *storage_registry;
    ECorbaStorageRegistryPrivate *priv;
    EStorage *storage;
    GNOME_Evolution_StorageListener listener_interface;
    GSList *iter;
    
    bonobo_object = bonobo_object_from_servant (servant);
    storage_registry = E_CORBA_STORAGE_REGISTRY (bonobo_object);
    priv = storage_registry->priv;

    storage = e_corba_storage_new (storage_interface, name);

    if (! e_storage_set_add_storage (priv->storage_set, storage)) {
        CORBA_exception_set (ev,
                     CORBA_USER_EXCEPTION,
                     ex_GNOME_Evolution_StorageRegistry_Exists,
                     NULL);
        return CORBA_OBJECT_NIL;
    }

    g_object_unref (storage);


       /* FIXME: if we remove a listener while looping through the list we can
        * crash. Yay CORBA reentrancy. */
    for (iter = priv->listeners; iter; iter = iter->next) {
        listener_notify (iter->data,
                 GNOME_Evolution_StorageRegistry_STORAGE_CREATED,
                 name);
    }
    
    listener_interface = CORBA_Object_duplicate (e_corba_storage_get_StorageListener
                             (E_CORBA_STORAGE (storage)), ev);

    return listener_interface;
}

static GNOME_Evolution_StorageRegistry_StorageList *
impl_StorageRegistry_getStorageList (PortableServer_Servant servant,
                     CORBA_Environment *ev)
{
    BonoboObject *bonobo_object;
    ECorbaStorageRegistry *storage_registry;
    ECorbaStorageRegistryPrivate *priv;
    GNOME_Evolution_StorageRegistry_StorageList *storage_list;
    GList *sl, *l;
    
    bonobo_object = bonobo_object_from_servant (servant);
    storage_registry = E_CORBA_STORAGE_REGISTRY (bonobo_object);
    priv = storage_registry->priv;

    sl = e_storage_set_get_storage_list (priv->storage_set);
    
    storage_list = GNOME_Evolution_StorageRegistry_StorageList__alloc ();
    storage_list->_maximum = g_list_length (sl);
    storage_list->_length = 0;
    storage_list->_buffer = CORBA_sequence_GNOME_Evolution_Storage_allocbuf (storage_list->_maximum);
    for (l = sl; l != NULL; l = l->next) {
        EStorage *storage;
        GNOME_Evolution_Storage corba_storage;
        CORBA_Environment ev2;
        
        CORBA_exception_init (&ev2);
        
        storage = l->data;
        if (E_IS_LOCAL_STORAGE (storage)) {
            corba_storage = e_local_storage_get_corba_interface (E_LOCAL_STORAGE (storage));
        } else if (E_IS_CORBA_STORAGE (storage)) {
            corba_storage = e_corba_storage_get_corba_objref (E_CORBA_STORAGE (storage));
        } else {
            continue;           
        }
        
        corba_storage = CORBA_Object_duplicate (corba_storage, &ev2);
        if (BONOBO_EX (&ev2)) {
            CORBA_exception_free (&ev2);            
            continue;
        }       
        storage_list->_buffer[storage_list->_length] = corba_storage;
        storage_list->_length++;        
    }

    CORBA_sequence_set_release (storage_list, TRUE);

    return storage_list;    
}

static GNOME_Evolution_Storage
impl_StorageRegistry_getStorageByName (PortableServer_Servant servant,
                       const CORBA_char *name,
                       CORBA_Environment *ev)
{
    BonoboObject *bonobo_object;
    ECorbaStorageRegistry *storage_registry;
    ECorbaStorageRegistryPrivate *priv;
    GNOME_Evolution_Storage corba_storage;
    EStorage *storage;

    bonobo_object = bonobo_object_from_servant (servant);
    storage_registry = E_CORBA_STORAGE_REGISTRY (bonobo_object);
    priv = storage_registry->priv;

    storage = e_storage_set_get_storage (priv->storage_set, name);
    if (storage == NULL) {
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_GNOME_Evolution_StorageRegistry_NotFound,
                     NULL);
        return CORBA_OBJECT_NIL;
    }

    corba_storage = CORBA_Object_duplicate (e_corba_storage_get_corba_objref
                        (E_CORBA_STORAGE (storage)), ev);

    return corba_storage;
}

static void
impl_StorageRegistry_removeStorageByName (PortableServer_Servant servant,
                      const CORBA_char *name,
                      CORBA_Environment *ev)
{
    BonoboObject *bonobo_object;
    ECorbaStorageRegistry *storage_registry;
    ECorbaStorageRegistryPrivate *priv;
    EStorage *storage;

    bonobo_object = bonobo_object_from_servant (servant);
    storage_registry = E_CORBA_STORAGE_REGISTRY (bonobo_object);
    priv = storage_registry->priv;

    storage = e_storage_set_get_storage (priv->storage_set, name);
    if (storage == NULL) {
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_GNOME_Evolution_StorageRegistry_NotFound,
                     NULL);
        return;
    }

    /* FIXME: Yucky to get the storage by name and then remove it.  */
    /* FIXME: Check failure.  */
    e_storage_set_remove_storage (priv->storage_set, storage);
}

static void
storage_set_foreach (EStorageSet *set,
             Bonobo_Listener listener)
{
    GList *storage_list, *p;

    storage_list = e_storage_set_get_storage_list (set);
    for (p = storage_list; p; p = p->next) {
        const char *name;

        name = e_storage_get_name (E_STORAGE (p->data));

        listener_notify (listener, GNOME_Evolution_StorageRegistry_STORAGE_CREATED, name);
        g_object_unref (p->data);
    }
    
    g_list_free (storage_list);
}

static GSList *
find_listener (GSList *p,
           Bonobo_Listener listener)
{
    CORBA_Environment ev;

    CORBA_exception_init (&ev);
    for (; p; p = p->next) {
        if (CORBA_Object_is_equivalent (p->data, listener, &ev) == TRUE) {
            CORBA_exception_free (&ev);
            return p;
        }
    }

    CORBA_exception_free (&ev);
    return NULL;
}

static void
impl_StorageRegistry_addListener (PortableServer_Servant servant,
                  Bonobo_Listener listener,
                  CORBA_Environment *ev)
{
    BonoboObject *bonobo_object;
    ECorbaStorageRegistry *storage_registry;
    ECorbaStorageRegistryPrivate *priv;
    Bonobo_Listener listener_copy;
    CORBA_Environment ev2;
    
    bonobo_object = bonobo_object_from_servant (servant);
    storage_registry = E_CORBA_STORAGE_REGISTRY (bonobo_object);
    priv = storage_registry->priv;

    if (find_listener (priv->listeners, listener) != NULL) {
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_GNOME_Evolution_StorageRegistry_AlreadyListening,
                     NULL);
        return;
    }

    CORBA_exception_init (&ev2);
    listener_copy = CORBA_Object_duplicate ((CORBA_Object) listener, &ev2);
    if (BONOBO_EX (&ev2)) {
        g_warning ("EvolutionStorageRegistry -- Cannot duplicate listener.");
        CORBA_exception_free (&ev2);
        return;
    }

    CORBA_exception_free (&ev2);
    priv->listeners = g_slist_prepend (priv->listeners, listener_copy);
    storage_set_foreach (priv->storage_set, listener_copy);
}

static void
impl_StorageRegistry_removeListener (PortableServer_Servant servant,
                     Bonobo_Listener listener,
                     CORBA_Environment *ev)
{
    BonoboObject *bonobo_object;
    ECorbaStorageRegistry *storage_registry;
    ECorbaStorageRegistryPrivate *priv;
    CORBA_Environment ev2;
    GSList *p;

    bonobo_object = bonobo_object_from_servant (servant);
    storage_registry = E_CORBA_STORAGE_REGISTRY (bonobo_object);
    priv = storage_registry->priv;

    p = find_listener (priv->listeners, listener);
    if (p == NULL) {
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_GNOME_Evolution_StorageRegistry_NotFound,
                     NULL);
        return;
    }

    CORBA_exception_init (&ev2);
    CORBA_Object_release ((CORBA_Object) p->data, &ev2);
    CORBA_exception_free (&ev2);
    
    priv->listeners = g_slist_remove_link (priv->listeners, p);
    g_slist_free (p);
}

static GNOME_Evolution_Folder *
impl_StorageRegistry_getFolderByUri (PortableServer_Servant servant,
                     const CORBA_char *uri,
                     CORBA_Environment *ev)
{
    BonoboObject *bonobo_object;
    ECorbaStorageRegistry *storage_registry;
    GNOME_Evolution_Folder *corba_folder;
    EStorageSet *storage_set;
    EFolder *folder;
    char *path;
    CORBA_char *corba_evolution_uri;

    bonobo_object = bonobo_object_from_servant (servant);
    storage_registry = E_CORBA_STORAGE_REGISTRY (bonobo_object);
    storage_set = storage_registry->priv->storage_set;

    if (!strncmp (uri, E_SHELL_URI_PREFIX, E_SHELL_URI_PREFIX_LEN)) {
        corba_evolution_uri = CORBA_string_dup (uri);
        path = (char *)uri + E_SHELL_URI_PREFIX_LEN;
        folder = e_storage_set_get_folder (storage_set, path);
    } else {
        path = e_storage_set_get_path_for_physical_uri (storage_set, uri);
        if (path) {
            corba_evolution_uri = CORBA_string_alloc (strlen (path) + E_SHELL_URI_PREFIX_LEN + 1);
            strcpy (corba_evolution_uri, E_SHELL_URI_PREFIX);
            strcat (corba_evolution_uri, path);
            folder = e_storage_set_get_folder (storage_set, path);
            g_free (path);
        } else {
            corba_evolution_uri = NULL;
            folder = NULL;
        }
    }

    if (!folder) {
        CORBA_exception_set (ev, CORBA_USER_EXCEPTION,
                     ex_GNOME_Evolution_StorageRegistry_NotFound,
                     NULL);
        return CORBA_OBJECT_NIL;
    }

    corba_folder = GNOME_Evolution_Folder__alloc ();

    corba_folder->displayName = CORBA_string_dup (e_folder_get_name (folder));

    corba_folder->description     = CORBA_string_dup (e_safe_corba_string (e_folder_get_description (folder)));
    corba_folder->type            = CORBA_string_dup (e_folder_get_type_string (folder));
    corba_folder->physicalUri     = CORBA_string_dup (e_safe_corba_string (e_folder_get_physical_uri (folder)));
    corba_folder->customIconName  = CORBA_string_dup (e_safe_corba_string (e_folder_get_custom_icon_name (folder)));
    corba_folder->evolutionUri    = corba_evolution_uri;
    corba_folder->unreadCount     = e_folder_get_unread_count (folder);
    corba_folder->sortingPriority = e_folder_get_sorting_priority (folder);

    return corba_folder;
}


/* GObject methods.  */

static void
impl_dispose (GObject *object)
{
    ECorbaStorageRegistry *corba_storage_registry;
    ECorbaStorageRegistryPrivate *priv;

    corba_storage_registry = E_CORBA_STORAGE_REGISTRY (object);
    priv = corba_storage_registry->priv;

    if (priv->storage_set != NULL) {
        g_object_unref (priv->storage_set);
        priv->storage_set = NULL;
    }

    (* G_OBJECT_CLASS (parent_class)->dispose) (object);
}

static void
impl_finalize (GObject *object)
{
    ECorbaStorageRegistry *corba_storage_registry;
    ECorbaStorageRegistryPrivate *priv;

    corba_storage_registry = E_CORBA_STORAGE_REGISTRY (object);
    priv = corba_storage_registry->priv;

    g_free (priv);

    (* G_OBJECT_CLASS (parent_class)->finalize) (object);
}


/* Initialization.  */

static void
e_corba_storage_registry_class_init (ECorbaStorageRegistryClass *klass)
{
    GObjectClass *object_class;
    POA_GNOME_Evolution_StorageRegistry__epv *epv;

    object_class = G_OBJECT_CLASS (klass);
    object_class->dispose  = impl_dispose;
    object_class->finalize = impl_finalize;

    epv = & klass->epv;
    epv->addStorage          = impl_StorageRegistry_addStorage;
    epv->getStorageList      = impl_StorageRegistry_getStorageList;
    epv->getStorageByName    = impl_StorageRegistry_getStorageByName;
    epv->removeStorageByName = impl_StorageRegistry_removeStorageByName;
    epv->addListener         = impl_StorageRegistry_addListener;
    epv->removeListener      = impl_StorageRegistry_removeListener;
    epv->getFolderByUri      = impl_StorageRegistry_getFolderByUri;

    parent_class = g_type_class_ref(PARENT_TYPE);
}

static void
e_corba_storage_registry_init (ECorbaStorageRegistry *corba_storage_registry)
{
    ECorbaStorageRegistryPrivate *priv;

    priv = g_new (ECorbaStorageRegistryPrivate, 1);
    priv->storage_set = NULL;
    priv->listeners = NULL;
    
    corba_storage_registry->priv = priv;
}


void
e_corba_storage_registry_construct (ECorbaStorageRegistry *corba_storage_registry,
                    EStorageSet *storage_set)
{
    ECorbaStorageRegistryPrivate *priv;

    g_return_if_fail (E_IS_CORBA_STORAGE_REGISTRY (corba_storage_registry));

    priv = corba_storage_registry->priv;

    g_object_ref (storage_set);
    priv->storage_set = storage_set;
}

ECorbaStorageRegistry *
e_corba_storage_registry_new (EStorageSet *storage_set)
{
    ECorbaStorageRegistry *corba_storage_registry;

    g_return_val_if_fail (storage_set != NULL, NULL);
    g_return_val_if_fail (E_IS_STORAGE_SET (storage_set), NULL);

    corba_storage_registry = g_object_new (e_corba_storage_registry_get_type (), NULL);

    e_corba_storage_registry_construct (corba_storage_registry, storage_set);

    return corba_storage_registry;
}


BONOBO_TYPE_FUNC_FULL (ECorbaStorageRegistry,
               GNOME_Evolution_StorageRegistry,
               PARENT_TYPE,
               e_corba_storage_registry)