static void process_data_from_server()
{
/* enough data present for the length field ? */
if (3 <= in_data_used) {
Uint8 *pData = in_data;
Uint16 size;
do { /* while (3 <= in_data_used) (enough data present for the length field) */
static const int foo = 1; /* used for run-time byteorder check */
/* make a copy of the length field...watch alignment/byteorder */
if (*(char *)&foo) { /* little-endian ? */
((Uint8 *)&size)[0] = pData[1];
((Uint8 *)&size)[1] = pData[2];
}
else { /* big-endian */
((Uint8 *)&size)[0] = pData[2];
((Uint8 *)&size)[1] = pData[1];
}
if (sizeof (in_data) - 3 >= size) { /* buffer big enough ? */
size += 2; /* add length field size */
if (size <= in_data_used) { /* do we have a complete message ? */
process_message_from_server(pData, size);
if (log_conn_data)
log_conn(pData, size);
/* advance to next message */
pData += size;
in_data_used -= size;
}
else
break;
}
else { /* sizeof (in_data) - 3 < size */
log_to_console(c_red2, packet_overrun);
log_to_console(c_red2, disconnected_from_server);
log_to_console(c_red2, alt_x_quit);
in_data_used = 0;
disconnected = 1;
// clear buddy list
clear_buddy();
}
} while (3 <= in_data_used);
/* move the remaining data to the start of the buffer...(not tested...never happened to me) */
if (in_data_used && pData != in_data)
memmove(in_data, pData, in_data_used);
}
}
void change_vertex_array(int value)
{
use_vertex_array=(value>0);
if(use_vertex_array)
{
log_to_console(c_green2,enabled_vertex_arrays);
}
}
void change_point_particles(int value)
{
use_point_particles=(value>0);
if(!use_point_particles)
{
log_to_console(c_green2,disabled_point_particles);
}
}
void change_particles_percentage(int value)
{
if(value>0 && value <=100) particles_percentage=value;
else
{
particles_percentage=0;
log_to_console(c_green2,disabled_particles_str);
}
}
void switch_vidmode(int mode)
{
if(mode>10 || mode<=0)
{
//warn about this error
log_to_console(c_red2,invalid_video_mode);
return;
}
else video_mode=mode;
if(!video_mode_set) return;
set_new_video_mode(full_screen,video_mode);
}
void get_message_from_server()
{
/* data available for reading ? */
if (!disconnected && SDLNet_CheckSockets(set, 0) && SDLNet_SocketReady(my_socket)) {
int received;
if (0 < (received = SDLNet_TCP_Recv(my_socket, &in_data[in_data_used], sizeof (in_data) - in_data_used))) {
in_data_used += received;
process_data_from_server();
}
else { /* 0 >= received (EOF or some error) */
if (received)
log_to_console(c_red2, SDLNet_GetError()); //XXX: SDL[Net]_GetError used by timer thread ? i bet its not reentrant...
log_to_console(c_red2, disconnected_from_server);
log_to_console(c_red2, alt_x_quit);
in_data_used = 0;
disconnected = 1;
// clear buddy list
clear_buddy();
}
}
}
void update_all_actors()
{
Uint8 str[40];
#ifdef EXTRA_DEBUG
ERR();
#endif
//we got a nasty error, log it
log_to_console(c_red2,resync_server);
destroy_all_actors();
str[0]=SEND_ME_MY_ACTORS;
my_tcp_send(my_socket,str,1);
}
internal bool32
al_log(bool32 error, const char *message, ...)
{
va_list argptr;
va_start(argptr, message);
log_to_file(AL_LOG_FILE, message, argptr);
va_end(argptr);
if (error)
{
va_start(argptr, message);
log_to_console(AL_LOG_FILE, message, argptr);
va_end(argptr);
}
return true;
}
void connect_to_server()
{
IPaddress ip;
if(this_version_is_invalid)return;
if(set)
{
SDLNet_FreeSocketSet(set);
set=0;
}
if(my_socket)
{
SDLNet_TCP_Close(my_socket);
my_socket=0;
}
log_to_console(c_red1,connect_to_server_str);
draw_scene(); // update the screen
set=SDLNet_AllocSocketSet(1);
if(!set)
{
char str[120];
sprintf(str,"SDLNet_AllocSocketSet: %s\n", SDLNet_GetError());
log_error(str);
SDLNet_Quit();
SDL_Quit();
exit(4); //most of the time this is a major error, but do what you want.
}
if(SDLNet_ResolveHost(&ip,server_address,port)==-1)
{
log_to_console(c_red2,failed_resolve);
return;
}
my_socket=SDLNet_TCP_Open(&ip);
if(!my_socket)
{
//check to see if the player is a moron...
if(server_address[0]=='1' && server_address[1]=='9' && server_address[2]=='2'
&& server_address[3]=='.' && server_address[4]=='1' && server_address[5]=='6'
&& server_address[6]=='8')
{
log_to_console(c_red1,license_check);
log_to_console(c_red1,alt_x_quit);
}
else
{
log_to_console(c_red1,failed_connect);
log_to_console(c_red1,reconnect_str);
log_to_console(c_red1,alt_x_quit);
}
return;
}
if(SDLNet_TCP_AddSocket(set,my_socket)==-1)
{
char str[120];
sprintf(str,"SDLNet_TCP_AddSocket: %s\n",SDLNet_GetError());
log_error(str);
SDLNet_Quit();
SDL_Quit();
exit(2);
}
disconnected=0;
//ask for the opening screen
if(!previously_logged_in)
{
Uint8 str[1];
str[0]=SEND_OPENING_SCREEN;
my_tcp_send(my_socket,str,1);
}
else
{
yourself=-1;
you_sit=0;
destroy_all_actors();
send_login_info();
}
//send the current version to the server
send_version_to_server(&ip);
last_heart_beat=cur_time;
hide_window(trade_win);
}
void process_message_from_server(unsigned char *in_data, int data_lenght)
{
//see what kind of data we got
switch (in_data[PROTOCOL])
{
case RAW_TEXT:
{
// do filtering and ignoring
data_lenght=filter_or_ignore_text(&in_data[3],data_lenght-3)+3;
if(data_lenght > 3)
{
//how to display it
if(interface_mode!=interface_opening)
put_text_in_buffer(&in_data[3],data_lenght-3,0);
else put_text_in_buffer(&in_data[3],data_lenght-3,54);
//lets log it
write_to_log(&in_data[3],data_lenght-3);
}
}
break;
case SMALL_WINDOW_TEXT:
{
add_text_to_small_text_buffer(in_data+3, data_lenght-3);
display_small_text_window();
}
break;
case ADD_NEW_ACTOR:
{
add_actor_from_server(&in_data[3]);
}
break;
case ADD_NEW_ENHANCED_ACTOR:
{
add_enhanced_actor_from_server(&in_data[3]);
}
break;
case ADD_ACTOR_COMMAND:
{
add_command_to_actor(*((short *)(in_data+3)),in_data[5]);
}
break;
case REMOVE_ACTOR:
{
destroy_actor(*((short *)(in_data+3)));
}
break;
case KILL_ALL_ACTORS:
{
destroy_all_actors();
}
break;
case NEW_MINUTE:
{
game_minute=*((short *)(in_data+3));
new_minute();
}
break;
case LOG_IN_OK:
{
interface_mode=interface_game;
previously_logged_in=1;
}
break;
case HERE_YOUR_STATS:
{
get_the_stats((Sint16 *)(in_data+3));
}
break;
case SEND_PARTIAL_STAT:
{
get_partial_stat(*((Uint8 *)(in_data+3)),*((Sint32 *)(in_data+4)));
}
break;
case GET_KNOWLEDGE_LIST:
{
get_knowledge_list(*(Uint16 *)(in_data+1)-1, in_data+3);
}
break;
case GET_NEW_KNOWLEDGE:
{
get_new_knowledge(*(Uint16 *)(in_data+3));
}
break;
case HERE_YOUR_INVENTORY:
{
get_your_items(in_data+3);
}
break;
case GET_NEW_INVENTORY_ITEM:
{
get_new_inventory_item(in_data+3);
}
break;
case REMOVE_ITEM_FROM_INVENTORY:
{
remove_item_from_inventory(*((Uint8 *)(in_data+3)));
}
break;
case INVENTORY_ITEM_TEXT:
{
put_small_text_in_box(&in_data[3],data_lenght-3,6*51+100,items_string);
if(!(get_show_window(items_win)||get_show_window(trade_win)))
{
put_text_in_buffer(&in_data[3],data_lenght-3,0);
}
}
break;
case GET_KNOWLEDGE_TEXT:
{
put_small_text_in_box(&in_data[3],data_lenght-3,6*51+150,knowledge_string);
}
break;
case CHANGE_MAP:
{
current_sector=-1;
if(map_file_name[0]!=0)
save_map(map_file_name);
object_under_mouse=-1;//to prevent a nasty crash, while looking for bags, when we change the map
close_dialogue(); // close the dialogue window if open
destroy_all_particles();
if(!load_map(&in_data[4])){ // creating map if it does not exist
int size=(in_data[3]&0x1f)<<4;
new_map(size,size);
dungeon=(in_data[3]&0x20)?1:0;
strcpy(map_file_name,&in_data[4]);
save_map(map_file_name);
}
kill_local_sounds();
#ifndef NO_MUSIC
playing_music=0;
#endif //NO_MUSIC
get_map_playlist();
have_a_map=1;
//also, stop the rain
seconds_till_rain_starts=-1;
seconds_till_rain_stops=-1;
is_raining=0;
rain_sound=0;//kill local sounds also kills the rain sound
weather_light_offset=0;
rain_light_offset=0;
}
break;
case GET_TELEPORTERS_LIST:
{
add_teleporters_from_list(&in_data[3]);
}
break;
case PLAY_MUSIC:
{
if(!no_sound)play_music(*((short *)(in_data+3)));
}
break;
case PLAY_SOUND:
{
if(!no_sound)add_sound_object(*((short *)(in_data+3)),*((short *)(in_data+5)),*((short *)(in_data+7)),*((char *)(in_data+9)),*((short *)(in_data+10)));
}
break;
case TELEPORT_OUT:
{
add_particle_sys_at_tile("./particles/teleport_in.part",*((short *)(in_data+3)),*((short *)(in_data+5)));
if(!no_sound)add_sound_object(snd_tele_out,*((short *)(in_data+3)),*((short *)(in_data+5)),1,0);
}
break;
case TELEPORT_IN:
{
add_particle_sys_at_tile("./particles/teleport_in.part",*((short *)(in_data+3)),*((short *)(in_data+5)));
if(!no_sound)add_sound_object(snd_tele_in,*((short *)(in_data+3)),*((short *)(in_data+5)),1,0);
}
break;
case LOG_IN_NOT_OK:
{
sprintf(log_in_error_str,"%s: %s",reg_error_str,invalid_pass);
}
break;
case REDEFINE_YOUR_COLORS:
{
strcpy(log_in_error_str,redefine_your_colours);
}
break;
case YOU_DONT_EXIST:
{
sprintf(log_in_error_str,"%s: %s",reg_error_str,char_dont_exist);
}
break;
case CREATE_CHAR_NOT_OK:
{
sprintf(create_char_error_str,"%s: %s",reg_error_str,char_name_in_use);
return;
}
break;
case CREATE_CHAR_OK:
{
login_from_new_char();
}
break;
case YOU_ARE:
{
yourself=*((short *)(in_data+3));
}
break;
case START_RAIN:
{
seconds_till_rain_starts=*((Uint8 *)(in_data+3));
seconds_till_rain_stops=-1;
}
break;
case STOP_RAIN:
{
seconds_till_rain_stops=*((Uint8 *)(in_data+3));
seconds_till_rain_starts=-1;
}
break;
case THUNDER:
{
add_thunder(rand()%5,*((Uint8 *)(in_data+3)));
}
break;
case SYNC_CLOCK:
{
server_time_stamp=*((int *)(in_data+3));
client_time_stamp=SDL_GetTicks();
client_server_delta_time=server_time_stamp-client_time_stamp;
}
break;
case PONG:
{
Uint8 str[160];
sprintf(str,"%s: %i MS",server_latency, SDL_GetTicks()-*((Uint32 *)(in_data+3)));
log_to_console(c_green1,str);
}
break;
case UPGRADE_NEW_VERSION:
{
log_to_console(c_red1,update_your_client);
log_to_console(c_red1,(char*)web_update_address);
}
break;
case UPGRADE_TOO_OLD:
{
log_to_console(c_red1,client_ver_not_supported);
log_to_console(c_red1,(char*)web_update_address);
this_version_is_invalid=1;
}
break;
case GET_NEW_BAG:
{
put_bag_on_ground(*((Uint16 *)(in_data+3)),*((Uint16 *)(in_data+5)),*((Uint8 *)(in_data+7)));
}
break;
case GET_BAGS_LIST:
{
add_bags_from_list(&in_data[3]);
}
break;
case SPAWN_BAG_PARTICLES:
{
add_particle_sys_at_tile("./particles/bag_in.part",*((Uint16 *)(in_data+3)),*((Uint16 *)(in_data+5)));
}
break;
case GET_NEW_GROUND_ITEM:
{
get_bag_item(in_data+3);
}
break;
case HERE_YOUR_GROUND_ITEMS:
{
get_bags_items_list(&in_data[3]);
}
break;
case CLOSE_BAG:
{
hide_window(ground_items_win);
}
break;
case REMOVE_ITEM_FROM_GROUND:
{
remove_item_from_ground(in_data[3]);
}
break;
case DESTROY_BAG:
{
remove_bag(in_data[3]);
}
break;
case NPC_TEXT:
{
put_small_text_in_box(&in_data[3],data_lenght-3,dialogue_menu_x_len-70,dialogue_string);
display_dialogue();
if(in_data[3]>=127 && in_data[4]>=127)
{
add_questlog(&in_data[4],data_lenght-4);
}
}
break;
case SEND_NPC_INFO:
{
my_strcp(npc_name,&in_data[3]);
cur_portrait=in_data[23];
}
break;
case NPC_OPTIONS_LIST:
{
build_response_entries(&in_data[3],*((Uint16 *)(in_data+1)));
}
break;
case GET_TRADE_ACCEPT:
{
if(!in_data[3])trade_you_accepted=1;
else
trade_other_accepted=1;
}
break;
case GET_TRADE_REJECT:
{
if(!in_data[3])trade_you_accepted=0;
else
trade_other_accepted=0;
}
break;
case GET_TRADE_EXIT:
{
hide_window(trade_win);
}
break;
case GET_YOUR_TRADEOBJECTS:
{
get_your_trade_objects(in_data+3);
}
break;
case GET_TRADE_OBJECT:
{
put_item_on_trade(in_data+3);
}
break;
case REMOVE_TRADE_OBJECT:
{
remove_item_from_trade(in_data+3);
}
break;
case GET_TRADE_PARTNER_NAME:
{
get_trade_partner_name(&in_data[3],*((Uint16 *)(in_data+1))-1);
}
break;
case GET_ACTOR_DAMAGE:
{
get_actor_damage(*((Uint16 *)(in_data+3)),in_data[5]);
}
break;
case GET_ACTOR_HEAL:
{
get_actor_heal(*((Uint16 *)(in_data+3)),in_data[5]);
}
break;
case ACTOR_UNWEAR_ITEM:
{
unwear_item_from_actor(*((Uint16 *)(in_data+3)),in_data[5]);
}
break;
case ACTOR_WEAR_ITEM:
{
actor_wear_item(*((Uint16 *)(in_data+3)),in_data[5],in_data[6]);
}
break;
case NPC_SAY_OVERTEXT:
{
add_displayed_text_to_actor(
get_actor_ptr_from_id( *((Uint16 *)(in_data+3)) ), in_data+5 );
}
break;
case BUDDY_EVENT:
{
if(in_data[3]==1)
add_buddy(&in_data[5],in_data[4],data_lenght-5);
else if(in_data[3]==0)
del_buddy(&in_data[4],data_lenght-4);
}
break;
// BARREN MOON NEW MESSAGES
case THIS_IS_ACTIVE_SECTOR:
active_sector=*((Uint16 *)(in_data+3));
break;
case GET_TILE_DATA:
get_tile_data(in_data+3);
break;
case GET_3D_OBJECTS:
get_3d_objects(in_data+3);
break;
case GET_2D_OBJECTS:
get_2d_objects(in_data+3);
break;
case GET_LIGHT_OBJECTS:
get_light_objects(in_data+3);
break;
case GET_PARTICLE_OBJECTS:
get_particle_objects(in_data+3);
break;
case GET_3D_OBJECTS_FULL_ROTATION:
get_3d_objects_full_rotation(in_data+3);
break;
case GET_CHECKSUMS:
{
actor *actor=pf_get_our_actor();
get_checksums(in_data+3, sector_get(actor->x_pos,actor->y_pos));
break;
}
case ADD_3D_OBJECT:
add_3d_object(in_data+3);
break;
case ADD_3D_OBJECT_FULL_ROTATION:
add_3d_object_fullrotation(in_data+3);
break;
case DELETE_3D_OBJECT:
delete_3d_object(in_data+3);
break;
case REPLACE_3D_OBJECT:
replace_3d_object(in_data+3);
break;
case ADD_2D_OBJECT:
add_2d_object(in_data+3);
break;
case DELETE_2D_OBJECT:
delete_2d_object(in_data+3);
break;
case REPLACE_2D_OBJECT:
replace_2d_object(in_data+3);
break;
case ADD_LIGHT:
add_lights(in_data+3);
break;
case DELETE_LIGHT:
delete_light(in_data+3);
break;
case ADD_PARTICLE:
add_particle(in_data+3);
break;
case DELETE_PARTICLE:
delete_particle(in_data+3);
break;
case REPLACE_PARTICLE:
replace_particle(in_data+3);
break;
default:
{
/* Unknown data type?? */;
}
break;
}
}
/**
* Example using STL adaptors
*/
void STLMoblet::STL_adaptors()
{
LOG("\n");
LOG("========================= STL adaptors ==========================================================================");
LOG("/**");
LOG("* Function object adaptors are used to create a function object from another function object." );
LOG("* The created function object, is not the same as the original functor, but is adapted to a certain need." );
LOG("* For example if we have a function object like std::less, and we want to compare all the elements" );
LOG("* in a range against 10, then be can use an STL adaptor (bind2nd), that bounds the second argument" );
LOG("* of std::less to 10. Then we can use std::less with algorithms like remove_copy_if," );
LOG("* that need a unary predicate." );
LOG("*" );
LOG("* STL provides two functor adaptors: bind1st and bind2nd." );
LOG("*" );
LOG("* bind1st: constructs an unary function object from a binary function object, by binding" );
LOG("* the first argument to a fixed value." );
LOG("*" );
LOG("* bind1st template function is defined like this:" );
LOG("*" );
LOG("* binder1st<SomeFunctor> bind1st (const SomeFunctor& fun, const T& fixedValue" );
LOG("* {" );
LOG("* return binder1st<SomeFunctor>(fun, x);" );
LOG("* }" );
LOG("*" );
LOG("* bind1st returns an binder1st object, which is actually a functor that forwards the function calls" );
LOG("* to the \"fun\" argument it takes as a parameter, when constructed:" );
LOG("*" );
LOG("* template <class Functor> class binder1st {" );
LOG("*" );
LOG("* binder1st(const Functor &fun, Functor::first_argument_type &fixed)" );
LOG("* {" );
LOG("* mFun = fun;" );
LOG("* mFixedValue = fixed;" );
LOG("* }" );
LOG("*" );
LOG("* Functor::result_type operator()(Functor::second_argument_type &someValue){" );
LOG("* return mFun(mFixedValue, someValue);" );
LOG("* }" );
LOG("* };" );
LOG("*" );
LOG("* bind2nd is implemented in a similar way, but instead of binding the first argument," );
LOG("* bind2nd it will bind the second one to a fixed value." );
LOG("*" );
LOG("* bind1st and bind2nd function templates are defined in the <functional> header." );
LOG("*/");
LOG("\n");
LOG(" Example using adaptors ");
LOG("\n ");
LOG("/**" );
LOG("* bind1st function template: constructs an unary function object from a" );
LOG("* binary function object, by binding the first parameter to a certain value." );
LOG("\n */" );
log_to_console("\n Example using std::bind1st:\n");
int array[] = { 1, -99, 2, -100 };
int arraySize = sizeof(array)/sizeof(array[0]);
std::vector<int> vec1(array, array + arraySize);
log_to_console(vec1, "vec1 contains: ");
LOG("\n" );
LOG("/**std::remove_if calls std::less(0, element). If less(0,element) returns" );
LOG("* true => removes that element." );
LOG("* less(0,element) is equivalent to 0<element." );
LOG("*/" );
LOG("\n" );
TRACE(std::vector<int>::iterator newEnd = std::remove_if(vec1.begin(),
vec1.end(), bind1st(std::less<int>(), 1)));
log_to_console("vec1 after calling std::remove_if(vec1.begin(), vec1.end(), "
"bind1st(std::less<int>(), 0)): ");
for(std::vector<int>::iterator it = vec1.begin(); it != newEnd; ++it)
{
log_to_console(*it);
}
LOG("\n" );
LOG("/**" );
LOG("* bind2nd function template: constructs an unary function object from a");
LOG("* binary function object, by binding the second parameter to a certain" );
LOG("* value." );
LOG("*/" );
log_to_console("\n Example using std::bind2nd:\n");
std::vector<int> vec2(array, array + arraySize);
log_to_console(vec2, "vec2 contains: ");
LOG("\n" );
LOG("/** std::remove_if calls std::greater(element, 0)." );
LOG("* If std::greater(element, 0) returns true => removes that element." );
LOG("* std::greater(element, 0) is equivalent to element > 0" );
LOG("*/" );
LOG("\n");
TRACE(newEnd = std::remove_if(vec2.begin(), vec2.end(),
bind2nd(std::greater<int>(), 0)));
log_to_console("vec2 after calling: std::remove_if(vec2.begin(), vec2.end(), "
"bind2nd(std::greater<int>(), 0));");
for(std::vector<int>::iterator it = vec2.begin(); it != newEnd; ++it)
{
log_to_console(*it);
}
LOG("\n");
}
void STLMoblet::STL_iterators()
{
LOG("========================= STL iterators ========================================================================");
LOG("/**");
LOG("* Input iterators: allow only reading elements from a sequence and moving forward, one step,");
LOG("* using operator++. The elements are read with operator*.");
LOG("* Provides also operator== and operator!=.");
LOG("* An input iterator implemented in STL is for example the one provided by std::istream.");
LOG("*/");
LOG("\n");
LOG("/**");
LOG("* Output iterators: allow only writing elements from a sequence and only moving forward, one step,");
LOG("* using operator++. They elements are written with operator*.");
LOG("* Provides also operator== and operator!=.");
LOG("* An input iterator implemented in STL is for example the one provided by std::ostream.");
LOG("*/");
LOG("\n");
LOG("/**");
LOG("* Forward iterators: allow reading and writing elements from a sequence. Only moving forward, one step,");
LOG("* using operator++ is possible. They elements are read and written with operator*.");
LOG("* Provides also operator== and operator!=.");
LOG("* An input iterator implemented in STL is for example the one provided by std::ostream.");
LOG("*/");
LOG("/**");
LOG("* Bidirectional iterators: allow reading and writing elements from a sequence. Allows moving forward and backward,");
LOG("* one step,using operator++/operator--. Their elements are read and written with operator*.");
LOG("* Provides also operator== and operator!=.");
LOG("* An input iterator implemented in STL is for example the ones provided by list, multiset, map, multimap.");
LOG("*/");
LOG("\n");
LOG(" Example using iterators ");
int sArray[] = { 0, 11, 22, 33, 44 };
int sArraySize = sizeof(sArray)/sizeof(sArray[0]);
std::list<int> myList(sArray, sArray + sArraySize);
LOG("Create a list object (myList) and fill it with: 0, 11, 22, 33, 44\n");
LOG("\n");
LOG("/**");
LOG("* create an bidirectional iterator");
LOG("*/");
LOG("std::list<int>::iterator iter;");
std::list<int>::iterator iter;
iter = myList.begin();
LOG("iter = myList.begin();");
LOG("\n");
LOG("/**");
LOG("* read operation");
LOG("*/");
int r = *iter;
log_to_console(r, "int r = *iter //r = ");
LOG("\n");
LOG("/**");
LOG("* write operation");
LOG("*/");
*iter = 99;
LOG("*iter = 99; //myList will contain now: 99, 11, 22, 33, 44");
LOG("\n");
LOG("/**");
LOG("* operator++");
LOG("*/");
iter++;
log_to_console(*iter, "iter++; //*iter is now: ");
LOG("\n");
LOG("/**");
LOG("* operator--");
LOG("*/");
--iter;
log_to_console(*iter, "iter--; //*iter is now: ");
LOG("\n");
LOG("/**");
LOG("* Random access iterators: allows all operations a normal pointer does: add and subtract integral values,");
LOG("* move forward and backward, one or more steps, use operator[] on it, subtract one iterator from another.");
LOG("* It overloads operator<, operator>, operator==, operator!=.");
LOG("* An input iterator implemented in STL is for example the ones provided by vector, deque, string.");
LOG("*/");
LOG("\n");
LOG("Create vector object (myVector) and fill with: 0, 11, 22, 33, 44");
std::vector<int> myVector(sArray, sArray + sArraySize); //myVector contains now: 0, 11, 22, 33, 44
LOG("\n");
LOG("/**");
LOG("* create an random iterator");
LOG("*/");
std::vector<int>::iterator randomAcessIter;
randomAcessIter = myVector.begin();
LOG("std::vector<int>::iterator randomAcessIter;");
LOG("randomAcessIter = myVector.begin();");
LOG("\n");
LOG("/**");
LOG("* read operation");
LOG("*/");
r = *randomAcessIter;
log_to_console(r, "r = *randomAcessIter; //r = ");
LOG("\n");
LOG("/**");
LOG("* write operation");
LOG("*/");
*randomAcessIter = 99;
log_to_console(myVector, "*randomAcessIter = 99;//myVector will contain now: ");
LOG("\n");
LOG("/**");
LOG("* operator++");
LOG("*/");
randomAcessIter++;
log_to_console(*randomAcessIter, "randomAcessIter++; //*randomAcessIter = ");
LOG("\n");
LOG("/**");
LOG("* operator--");
LOG("*/");
--randomAcessIter;
log_to_console(*randomAcessIter, "randomAcessIter--; //*randomAcessIter = ");
LOG("\n");
LOG("/**");
LOG("* move two steps forward");
LOG("*/");
LOG("\n");
randomAcessIter += 2;
log_to_console(*randomAcessIter, "randomAcessIter +=2; //*randomAcessIter = ");
LOG("\n");
}
int check_var(char * str, int type)
{
int i,*p;
char * ptr=str;
float foo;
for(i=0;i<our_vars.no;i++)
{
if(type?!strncmp(str,our_vars.var[i]->name,our_vars.var[i]->nlen):!strncmp(str,our_vars.var[i]->shortname,our_vars.var[i]->snlen))
{
//Allright, it's the right variable... now move ptr forward
ptr+=type?our_vars.var[i]->nlen:our_vars.var[i]->snlen;
while(*ptr && (*ptr==' '||*ptr=='='))ptr++;//go to the string occurence
if(!*ptr||*ptr=='\n')return -1;//hmm, why would you do such a stupid thing?
if(*ptr=='"')
{
//Accurate quoting
char *tptr=++ptr;
while(*tptr && *tptr!='"')
{
if(*tptr==0x0a||*tptr==0x0d)
{
#ifdef ELC
char str[200];
snprintf(str,200,"Reached newline without an ending \" in %s",our_vars.var[i]->name);
log_to_console(c_red2,str);
#endif
break;
}
tptr++;
}
*tptr=0;
}
else
{
//Strip it
char our_string[200];
char *tptr=our_string;
while(*ptr && *ptr!=0x0a && *ptr!=0x0d)
{
if(*ptr!=' ')*tptr++=*ptr++; //Strip all spaces
else ptr++;
}
*tptr=0;
ptr=our_string;
}
switch(our_vars.var[i]->type)
{
case SPECINT:
our_vars.var[i]->func(atoi(ptr));
return 1;
case SPECCHAR:
our_vars.var[i]->func(ptr);
return 1;
case INT:
our_vars.var[i]->func(our_vars.var[i]->var,atoi(ptr));
return 1;
case SPEC:
p=our_vars.var[i]->var;
if(*p!=atoi(ptr))our_vars.var[i]->func();//the variable has changed
return 1;
case BOOL:
p=our_vars.var[i]->var;
if((atoi(ptr)>0)!=*p) our_vars.var[i]->func(our_vars.var[i]->var);
return 1;
case STRING:
our_vars.var[i]->func(our_vars.var[i]->var,ptr,our_vars.var[i]->len);
return 1;
case FLOAT:
foo=atof(ptr);
our_vars.var[i]->func(our_vars.var[i]->var,&foo);
return 1;
}
}
}
return -1;//no variable was found
}
/**
* Function for illustrating predicates
*/
void STLMoblet::predicates_explained()
{
LOG("\n");
LOG("========================= about predicates ======================================================================");
LOG("/**");
LOG("* A predicate is a function that returns a boolean value based on some");
LOG("* comparison criterion.");
LOG("* Predicates are used usually with STL algorithms.");
LOG("* Binary predicates - predicates that take two arguments.");
LOG("* Unary predicates - predicates taking one argument.");
LOG("* Usually binary predicates are used with algorithms that need to compare two");
LOG("* elements (e.g sorting algorithms).");
LOG("*/");
LOG("\n");
LOG(" Example using predicates: ");
LOG("\n Unary predicate example...");
int array[] = { 0, 1, 2, 3, 4};
int sizeArray = sizeof(array)/sizeof(array[0]);
std::vector<int> myVector(array, array + sizeArray); //fill a vector
log_to_console(myVector, "myVector contains: ");
LOG("/**");
LOG("* std::countf_if algorithm: counts the number of elements that satisfy the");
LOG("* condition we supply (e.g isEven, isNegative)");
LOG("*/");
log_to_console("Calling: std::count_if(myVector.begin(), myVector.end(), "
"isEven);");
int res = std::count_if(myVector.begin(), myVector.end(),
NumericUtilities::isEven); //returns the how many numbers are even
log_to_console(res, "int res = std::count_if(myVector.begin(), myVector.end(), "
"isEven); //res = ");
log_to_console("\n Binary predicate example...");
Employee staff[] = { Employee(3, "Jonny"),
Employee(2, "Bob"),
Employee(20, "Filomela")};
int staffSize = sizeof(staff)/sizeof(staff[0]);
std::vector<Employee> myStaff( staff, staff + staffSize);
log_to_console(myStaff, "myStaff contains: ");
LOG("\n");
LOG("/**");
LOG("* std::sort algorithm: sorts the elements, from a range, into ascending");
LOG("* order");
LOG("* lessExperience - a binary predicate for comparing employees");
LOG("*/");
LOG("\n");
TRACE(std::sort(myStaff.begin(), myStaff.end(), lessExperiencePredicate));;
log_to_console(myStaff, "myStaff contains now: ");
LOG("\n");
}
