FOREACH

#define _FOREACH_LOCAL_VERSION        2

// Foreach is testing us.
#if defined _FOREACH_INC_TEST
        #define _FOREACH_CUR_VERSION _FOREACH_LOCAL_VERSION
        #endinput
#endif
#if !defined _FOREACH_NO_TEST
        #define _FOREACH_INC_TEST
        #tryinclude <YSI\y_iterate>
        #undef _FOREACH_INC_TEST
        // <y_iterate> exists - test which is newer.
        #if defined _inc_y_iterate
                #if !defined _FOREACH_CUR_VERSION
                        // y_iterate exists, but it's an old version - don't try use this
                        // system or the variables will conflict.
                        #endinput
                #endif
                #if _FOREACH_CUR_VERSION > _FOREACH_LOCAL_VERSION
                        // y_iterate is newer.
                        #undef _inc_y_iterate
                        #define _FOREACH_NO_TEST
                        #include <YSI\y_iterate>
                        #endinput
                #endif
        #endif
#endif

#if !defined _samp_included
        #error "Please include a_samp or a_npc before foreach"
#endif

#if defined SendChat || defined FOREACH_NO_PLAYERS
        #define BOTSYNC_IS_BOT     (true)
#endif

#if defined IsPlayerNPC
        #define _FOREACH_BOT
#endif

#if !defined BOTSYNC_IS_BOT
        static
                bool:YSI_g_OPC = false,
                bool:YSI_g_OPDC = false;
#endif

#if defined YSI_ITTER_NO_SORT
        #error YSI_ITTER_NO_SORT is no longer supported by foreach.
#endif

/*----------------------------------------------------------------------------*-
Function:
        Itter_Create2
Params:
        name - Itterator identifier.
        size0 - Number of iterators.
        size1 - Number of items per iterator.
Return:
        -
Notes:
        Creates a new array of itterator start/array pair.
-*----------------------------------------------------------------------------*/

#define Iter_Create2 Itter_Create2
#define Itter_Create2(%1,%2,%3) \
        new \
                YSI_gS%1[%2] = {-1, ...}, \
                YSI_gC%1[%2] = {0}, \
                YSI_gA%1[%2][%3]

#define IteratorArray:%1[%2]<%3> \
        YSI_gS%1[%2] = {-1, ...}, \
        YSI_gC%1[%2] = {0}, \
        YSI_gA%1[%2][%3]

/*----------------------------------------------------------------------------*-
Function:
        Itter_Init2
Params:
        itter - Name of the itterator array to initialise.
Return:
        -
Notes:
        Wrapper for Itter_InitInternal.

native Iter_Init(IteratorArray:Name[]<>);

-*----------------------------------------------------------------------------*/

#define Iter_Init Itter_Init
#define Itter_Init(%1) \
        Itter_InitInternal(YSI_gA%1, sizeof (YSI_gA%1), sizeof (YSI_gA%1[]))

/*----------------------------------------------------------------------------*-
Function:
        Itter_Create
Params:
        name - Itterator identifier.
        size - Number of values.
Return:
        -
Notes:
        Creates a new itterator start/array pair.
-*----------------------------------------------------------------------------*/

#define Iter_Create Itter_Create
#define Itter_Create(%1,%2) \
        new \
                YSI_gS%1 = -1, \
                YSI_gC%1 = 0, \
                YSI_gA%1[%2] = {-1, ...}

/*----------------------------------------------------------------------------*-
Array:
        Iterator
Notes:
        Creates a new itterator start/array pair.
-*----------------------------------------------------------------------------*/

#define Iterator:%1<%2> \
        YSI_gS%1 = -1, \
        YSI_gC%1 = 0, \
        YSI_gA%1[%2] = {-1, ...}

/*----------------------------------------------------------------------------*-
Function:
        Itter_Add
Params:
        itter - Name of the itterator to add the data to.
        value - Value to add to the itterator.
Return:
        -
Notes:
        Wrapper for Itter_AddInternal.

native Iter_Add(Iterator:Name<>, value);

-*----------------------------------------------------------------------------*/

#define Iter_Add Itter_Add
#define Itter_Add(%1,%2) \
        Itter_AddInternal(YSI_gS%1, YSI_gC%1, YSI_gA%1, %2)

/*----------------------------------------------------------------------------*-
Function:
        Itter_Free
Params:
        itter - Name of the itterator to get the first free slot in.
Return:
        -
Notes:
        Wrapper for Itter_FreeInternal.

native Iter_Free(Iterator:Name<>);

-*----------------------------------------------------------------------------*/

#define Iter_Free Itter_Free
#define Itter_Free(%1) \
        Itter_FreeInternal(YSI_gS%1, YSI_gC%1, YSI_gA%1, sizeof (YSI_gA%1))

/*----------------------------------------------------------------------------*-
Function:
        Itter_Remove
Params:
        itter - Name of the itterator to remove data from.
        value - Data to remove.
Return:
        -
Notes:
        Wrapper for Itter_RemoveInternal.

native Iter_Remove(Iterator:Name<>, value);

-*----------------------------------------------------------------------------*/

#define Iter_Remove Itter_Remove
#define Itter_Remove(%1,%2) \
        Itter_RemoveInternal(YSI_gS%1, YSI_gC%1, YSI_gA%1, %2)

/*----------------------------------------------------------------------------*-
Function:
        Itter_Random
Params:
        itter - Name of the itterator to get a random slot from.
Return:
        -
Notes:
        Wrapper for Itter_RandomInternal.

native Iter_Random(Iterator:Name<>);

-*----------------------------------------------------------------------------*/

#define Iter_Random Itter_Random
#define Itter_Random(%1) \
        Itter_RandomInternal(YSI_gS%1, YSI_gC%1, YSI_gA%1)

/*----------------------------------------------------------------------------*-
Function:
        Itter_Debug
Params:
        itter - Name of the itterator to output debug information from.
Return:
        -
Notes:
        Wrapper for Itter_ShowArray.
-*----------------------------------------------------------------------------*/

#define Iter_Debug Itter_Debug
#define Itter_Debug(%1) \
        Itter_ShowArray(YSI_gS%1, YSI_gA%1, YSI_gC%1)

/*----------------------------------------------------------------------------*-
Function:
        Itter_Count
Params:
        itter - Name of the itterator to get a random slot from4.
Return:
        -
Notes:
        Returns the number of items in this itterator.

native Iter_Count(Iterator:Name<>);

-*----------------------------------------------------------------------------*/

#define Iter_Count Itter_Count
#define Itter_Count(%1) \
        YSI_gC%1

/*----------------------------------------------------------------------------*-
Function:
        Itter_Clear
Params:
        itter - Name of the itterator empty.
Return:
        -
Notes:
        Wrapper for Itter_ClearInternal.

native Iter_Clear(IteratorArray:Name[]<>);

-*----------------------------------------------------------------------------*/

#define Iter_Clear Itter_Clear
#define Itter_Clear(%1) \
        Itter_ClearInternal(YSI_gS%1, YSI_gC%1, YSI_gA%1)

/*----------------------------------------------------------------------------*-
Create the internal itterators.
-*----------------------------------------------------------------------------*/

#if !defined BOTSYNC_IS_BOT
        new
                Iterator:Player<MAX_PLAYERS>;

        #if defined _FOREACH_BOT && !defined FOREACH_NO_BOTS
                new
                        Iterator:Bot<MAX_PLAYERS>,
                        Iterator:Character<MAX_PLAYERS>;

                #define YSI_gNPCS YSI_gBotS
                #define YSI_gNPCC YSI_gBotC
                #define YSI_gNPCA YSI_gBotA
        #endif
#endif

/*----------------------------------------------------------------------------*-
Function:
        foreach
Params:
        data - Data to itterate through.
        as - Variable to set value to.
Return:
        -
Notes:
        Not exactly the same as PHP foreach, just itterates through a list and
        returns the value of the current slot but uses that slot as the next index
        too.  Variables must be in the form YSI_g<name>S for the start index and
        YSI_g<name>A for the data array where <name> is what's entered in data.
-*----------------------------------------------------------------------------*/

#define foreach(%1,%2) \
        for (new %2 = YSI_gS%1; _:%2 != -1; %2 = YSI_gA%1[%2])

/*----------------------------------------------------------------------------*-
Function:
        foreachex
Params:
        data - Data to itterate through.
        as - Variable to set value to.
Return:
        -
Notes:
        Similar to foreach but doesn't declare a new variable for the itterator.
-*----------------------------------------------------------------------------*/

#define foreachex(%1,%2) \
        for (%2 = YSI_gS%1; _:%2 != -1; %2 = YSI_gA%1[%2])

/*----------------------------------------------------------------------------*-
Function:
        Itter_OnPlayerConnect
Params:
        playerid - Player who joined.
Return:
        -
Notes:
        Adds a player to the loop data.  Now sorts the list too.  Note that I found
        the most bizzare bug ever (I *think* it may be a compiler but, but it
        requires further investigation), basically it seems that multiple variables
        were being treated as the same variable (namely YSI_gBotS and
        YSI_gCharacterS were the same and YSI_gBotC and YSI_gCharacterC were the
        same).  Adding print statements which reference these variables seem to fix
        the problem, and I've tried to make sure that the values will never actually
        get printed.
-*----------------------------------------------------------------------------*/

#if !defined BOTSYNC_IS_BOT
        public
                OnPlayerConnect(playerid)
        {
                #if defined _FOREACH_BOT
                        if (!IsPlayerNPC(playerid))
                        {
                                Itter_Add(Player, playerid);
                        }
                        #if !defined FOREACH_NO_BOTS
                                else
                                {
                                        Itter_Add(Bot, playerid);
                                }
                                #pragma tabsize 4
                                Itter_Add(Character, playerid);
                        #endif
                #else
                        Itter_Add(Player, playerid);
                #endif
                if (YSI_g_OPC)
                {
                        return CallLocalFunction("Itter_OnPlayerConnect", "i", playerid);
                }
                return 1;
        }

        #if defined _ALS_OnPlayerConnect
                #undef OnPlayerConnect
        #else
                #define _ALS_OnPlayerConnect
        #endif
        #define OnPlayerConnect Itter_OnPlayerConnect

        forward
                Itter_OnPlayerConnect(playerid);
#endif

/*----------------------------------------------------------------------------*-
Function:
        Itter_OnGameModeInit
Params:
        -
Return:
        -
Notes:
        There are WIERD bugs in this script, seemingly caused by the compiler, so
        this hopefully fixes them.  The OnFilterScriptInit code is written to be
        very fast by utilising the internal array structure instead of the regular
        Add functions.
-*----------------------------------------------------------------------------*/

#if !defined BOTSYNC_IS_BOT
        #if defined FILTERSCRIPT
                public
                        OnFilterScriptInit()
                {
                        if (YSI_gCPlayer)
                        {
                                print("foreach error: Something went wrong again!  Please tell Y_less");
                                // Try reset.
                                #if defined _FOREACH_BOT && !defined FOREACH_NO_BOTS
                                        printf("%d", YSI_gSBot);
                                        printf("%d", YSI_gCBot);
                                        printf("%d", YSI_gSCharacter);
                                        printf("%d", YSI_gCCharacter);

                                #endif
                                printf("%d", YSI_gSPlayer);
                                printf("%d", YSI_gCPlayer);
                        }
                        #if defined _FOREACH_BOT && !defined FOREACH_NO_BOTS
                                new
                                        lastBot = -1,
                                        lastCharacter = -1;
                        #endif
                        new
                                lastPlayer = -1;
                        for (new i = 0; i != MAX_PLAYERS; ++i)
                        {
                                if (IsPlayerConnected(i))
                                {
                                        #if defined _FOREACH_BOT
                                                if (!IsPlayerNPC(i))
                                                {
                                                        if (lastPlayer == -1)
                                                        {
                                                                YSI_gSPlayer = i;
                                                        }
                                                        else
                                                        {
                                                                YSI_gAPlayer[lastPlayer] = i;
                                                        }
                                                        ++YSI_gCPlayer;
                                                        lastPlayer = i;
                                                }
                                                #if !defined FOREACH_NO_BOTS
                                                        else
                                                        {
                                                                if (lastBot == -1)
                                                                {
                                                                        YSI_gSBot = i;
                                                                }
                                                                else
                                                                {
                                                                        YSI_gABot[lastBot] = i;
                                                                }
                                                                ++YSI_gCBot;
                                                                lastBot = i;
                                                        }
                                                        #pragma tabsize 4
                                                        if (lastCharacter == -1)
                                                        {
                                                                YSI_gSCharacter = i;
                                                        }
                                                        else
                                                        {
                                                                YSI_gACharacter[lastCharacter] = i;
                                                        }
                                                        ++YSI_gCCharacter;
                                                        lastCharacter = i;
                                                #endif
                                        #else
                                                if (lastPlayer == -1)
                                                {
                                                        YSI_gSPlayer = i;
                                                }
                                                else
                                                {
                                                        YSI_gAPlayer[lastPlayer] = i;
                                                }
                                                ++YSI_gCPlayer;
                                                lastPlayer = i;
                                        #endif
                                }
                        }
                        YSI_g_OPC = (funcidx("Itter_OnPlayerConnect") != -1);
                        YSI_g_OPDC = (funcidx("Itter_OnPlayerDisconnect") != -1);
                        CallLocalFunction("Itter_OnFilterScriptInit", "");
                }

                #if defined _ALS_OnFilterScriptInit
                        #undef OnFilterScriptInit
                #else
                        #define _ALS_OnFilterScriptInit
                #endif
                #define OnFilterScriptInit Itter_OnFilterScriptInit

                forward Itter_OnFilterScriptInit();
        #else
                public
                        OnGameModeInit()
                {
                        if (YSI_gCPlayer)
                        {
                                print("foreach error: Something went wrong again!  Is this a Filterscript and have you");
                                print("foreach error: got \"#define FILTERSCRIPT\" above all your includes?  Resetting...");
                                #if defined _FOREACH_BOT && !defined FOREACH_NO_BOTS
                                        printf("%d", YSI_gSBot);
                                        printf("%d", YSI_gCBot);
                                        printf("%d", YSI_gSCharacter);
                                        printf("%d", YSI_gCCharacter);
                                        YSI_gCBot = 0;
                                        YSI_gCCharacter = 0;
                                        YSI_gSBot = -1;
                                        YSI_gSCharacter = -1;
                                #endif
                                printf("%d", YSI_gSPlayer);
                                printf("%d", YSI_gCPlayer);
                                YSI_gCPlayer = 0;
                                YSI_gSPlayer = -1;
                                for (new i = 0; i != MAX_PLAYERS; ++i)
                                {
                                        #if defined _FOREACH_BOT && !defined FOREACH_NO_BOTS
                                                YSI_gABot[i] = -1;
                                                YSI_gACharacter[i] = -1;
                                        #endif
                                        YSI_gAPlayer[i] = -1;
                                }
                        }
                        YSI_g_OPC = (funcidx("Itter_OnPlayerConnect") != -1);
                        YSI_g_OPDC = (funcidx("Itter_OnPlayerDisconnect") != -1);
                        CallLocalFunction("Itter_OnGameModeInit", "");
                }

                #if defined _ALS_OnGameModeInit
                        #undef OnGameModeInit
                #else
                        #define _ALS_OnGameModeInit
                #endif
                #define OnGameModeInit Itter_OnGameModeInit

                forward
                        Itter_OnGameModeInit();
        #endif
#endif

/*----------------------------------------------------------------------------*-
Function:
        Itter_OnPlayerDisconnect
Params:
        playerid - Player who left.
Return:
        -
Notes:
        Removes a player from the loop data.
-*----------------------------------------------------------------------------*/

#if !defined BOTSYNC_IS_BOT
        public
                OnPlayerDisconnect(playerid, reason)
        {
                #if defined _FOREACH_BOT
                        if (!IsPlayerNPC(playerid))
                        {
                                Itter_Remove(Player, playerid);
                        }
                        #if !defined FOREACH_NO_BOTS
                                else
                                {
                                        Itter_Remove(Bot, playerid);
                                }
                                #pragma tabsize 4
                                Itter_Remove(Character, playerid);
                        #endif
                #else
                        Itter_Remove(Player, playerid);
                #endif
                if (YSI_g_OPDC)
                {
                        return CallLocalFunction("Itter_OnPlayerDisconnect", "ii", playerid, reason);
                }
                return 1;
        }

        #if defined _ALS_OnPlayerDisconnect
                #undef OnPlayerDisconnect
        #else
                #define _ALS_OnPlayerDisconnect
        #endif
        #define OnPlayerDisconnect Itter_OnPlayerDisconnect

        forward
                Itter_OnPlayerDisconnect(playerid, reason);
#endif

/*----------------------------------------------------------------------------*-
Function:
        Itter_ShowArray
Params:
        start - Itterator start point.
        members[] - Itterator contents.
        size - Number of itterator values
Return:
        -
Notes:
        Pure debug function.  Has regular prints not debug prints
        as it's only called when debug is on.
-*----------------------------------------------------------------------------*/

stock
        Itter_ShowArray(start, members[], size)
{
        static
                sString[61];
        new
                i,
                j = 10;
        printf("Start: %d", start);
        printf("Size:  %d", size);
        while (i < size)
        {
                sString[0] = '\0';
                while (i < j && i < size)
                {
                        format(sString, sizeof (sString), "%s, %d", sString, members[i]);
                        i++;
                }
                printf("Array (%d): %s", j, sString);
                j += 10;
        }
}

/*----------------------------------------------------------------------------*-
Function:
        Itter_RandomInternal
Params:
        start - Array start index.
        count - Number of items in the itterator.
        array[] - Itterator data.
Return:
        -
Notes:
        Returns a random value from an iterator.
-*----------------------------------------------------------------------------*/

stock
        Itter_RandomInternal(start, count, array[])
{
        if (count == 0)
        {
                return -1;
        }
        new
                rnd = random(count),
                cur = start;
        while (cur != -1)
        {
                if (rnd--)
                {
                        cur = array[cur];
                }
                else
                {
                        return cur;
                }
        }
        return -1;
}

/*----------------------------------------------------------------------------*-
Function:
        Itter_FreeInternal
Params:
        start - Array start index.
        count - Number of items in the itterator.
        array[] - Itterator data.
        size - Size of the itterator.
Return:
        -
Notes:
        Finds the first free slot in the itterator.  Itterators now HAVE to be
        sorted for this function to work correctly as it uses that fact to decide
        wether a slot is unused or the last one.  If you want to use the slot
        straight after finding it the itterator will need to re-find it to add in
        the data.
-*----------------------------------------------------------------------------*/

stock
        Itter_FreeInternal(start, count, array[], size)
{
        if (count == size)
        {
                return -1;
        }
        else if (count == 0)
        {
                return 0;
        }
        new
                first = 0;
        while (first != -1)
        {
                if (first == start)
                {
                        start = array[start];
                }
                else if (array[first] == -1)
                {
                        return first;
                }
                ++first;
        }
        return -1;
}

/*----------------------------------------------------------------------------*-
Function:
        Itter_AddInternal
Params:
        &start - Array start index.
        &count - Number of items in the itterator.
        array[] - Itterator data.
        value - Item to add.
Return:
        -
Notes:
        Adds a value to a given itterator set.
-*----------------------------------------------------------------------------*/

stock
        Itter_AddInternal(&start, &count, array[], value)
{
        if (array[value] != -1)
        {
                return 0;
        }
        ++count;
        if (start == -1)
        {
                start = value;
        }
        else if (start > value)
        {
                array[value] = start;
                start = value;
        }
        else
        {
                new
                        cur = start,
                        last;
                do
                {
                        last = cur;
                        cur = array[cur];
                        if (cur > value)
                        {
                                array[value] = cur;
                                array[last] = value;
                                return 1;
                        }
                }
                while (cur != -1);
                array[last] = value;
        }
        return 1;
}

/*----------------------------------------------------------------------------*-
Function:
        Itter_RemoveInternal
Params:
        &start - Array start index.
        &count - Number of items in the itterator.
        array[] - Itterator data.
        value - Item to remove.
Return:
        -
Notes:
        Removes a value from an itterator.
-*----------------------------------------------------------------------------*/

stock
        Itter_RemoveInternal(&start, &count, array[], value)
{
        if (start == -1)
        {
                return 0;
        }
        if (start == value)
        {
                start = array[value];
        }
        else
        {
                new
                        cur = start;
                while (array[cur] != value)
                {
                        cur = array[cur];
                        if (cur == -1)
                        {
                                return 0;
                        }
                }
                array[cur] = array[value];
        }
        array[value] = -1;
        --count;
        return 1;
}

/*----------------------------------------------------------------------------*-
Function:
        Itter_ClearInternal
Params:
        &start - Array start index.
        &count - Number of items in the itterator.
        array[] - Itterator data.
Return:
        -
Notes:
        Resets an iterator.
-*----------------------------------------------------------------------------*/

stock
        Itter_ClearInternal(&start, &count, array[])
{
        if (start != -1)
        {
                new
                        cur = start,
                        next = array[cur];
                start = -1;
                count = 0;
                while (next != -1)
                {
                        array[cur] = -1;
                        cur = next;
                        next = array[cur];
                }
        }
}

/*----------------------------------------------------------------------------*-
Function:
        Itter_InitInternal
Params:
        array[][] - Itterator array to initialise.
        s0 - Size of first dimension.
        s1 - Size of second dimension.
Return:
        -
Notes:
        Multi-dimensional arrays can't be initialised at compile time, so need to be
        done at run time, which is slightly annoying.
-*----------------------------------------------------------------------------*/

stock
        Itter_InitInternal(arr[][], s0, s1)
{
        for (new i = 0; i != s0; ++i)
        {
                for (new j = 0; j != s1; ++j)
                {
                        arr[i][j] = -1;
                }
        }