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Location: cpp/openttd-patchpack/source/src/script/api/script_list.cpp - annotation
r27308:abc0eb023c25
23.2 KiB
text/x-c
Codechange: use std::string as std::map key, instead of stredup string
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r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18501:8e3d905ea4bc r18500:14a481bc4437 r22094:2a4a4665dd63 r22094:2a4a4665dd63 r18500:14a481bc4437 r18500:14a481bc4437 r18501:8e3d905ea4bc r22094:2a4a4665dd63 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18501:8e3d905ea4bc r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r22010:e2c664f87e92 r22010:e2c664f87e92 r18500:14a481bc4437 r22010:e2c664f87e92 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18501:8e3d905ea4bc r18500:14a481bc4437 r18500:14a481bc4437 r18538:4f2ae4af95a1 r21642:d4ee019baf14 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18501:8e3d905ea4bc r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r25872:f3cf79dd5c72 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18501:8e3d905ea4bc r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18501:8e3d905ea4bc r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r23796:8cda3dcb7de8 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r21642:d4ee019baf14 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 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r22392:1bc1eb28b781 r22392:1bc1eb28b781 r22392:1bc1eb28b781 r22392:1bc1eb28b781 r22392:1bc1eb28b781 r22392:1bc1eb28b781 r22392:1bc1eb28b781 r22392:1bc1eb28b781 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18501:8e3d905ea4bc r21642:d4ee019baf14 r18500:14a481bc4437 r18500:14a481bc4437 r18790:e07f88e01903 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18500:14a481bc4437 r18501:8e3d905ea4bc r18500:14a481bc4437 r18500:14a481bc4437 r18501:8e3d905ea4bc r18500:14a481bc4437 r18500:14a481bc4437 | /*
* This file is part of OpenTTD.
* OpenTTD 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, version 2.
* OpenTTD 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 OpenTTD. If not, see <http://www.gnu.org/licenses/>.
*/
/** @file script_list.cpp Implementation of ScriptList. */
#include "../../stdafx.h"
#include "script_list.hpp"
#include "script_controller.hpp"
#include "../../debug.h"
#include "../../script/squirrel.hpp"
#include "../../safeguards.h"
/**
* Base class for any ScriptList sorter.
*/
class ScriptListSorter {
protected:
ScriptList *list; ///< The list that's being sorted.
bool has_no_more_items; ///< Whether we have more items to iterate over.
SQInteger item_next; ///< The next item we will show.
public:
/**
* Virtual dtor, needed to mute warnings.
*/
virtual ~ScriptListSorter() { }
/**
* Get the first item of the sorter.
*/
virtual SQInteger Begin() = 0;
/**
* Stop iterating a sorter.
*/
virtual void End() = 0;
/**
* Get the next item of the sorter.
*/
virtual SQInteger Next() = 0;
/**
* See if the sorter has reached the end.
*/
bool IsEnd()
{
return this->list->buckets.empty() || this->has_no_more_items;
}
/**
* Callback from the list if an item gets removed.
*/
virtual void Remove(SQInteger item) = 0;
/**
* Attach the sorter to a new list. This assumes the content of the old list has been moved to
* the new list, too, so that we don't have to invalidate any iterators. Note that std::swap
* doesn't invalidate iterators on lists and maps, so that should be safe.
* @param target New list to attach to.
*/
virtual void Retarget(ScriptList *new_list)
{
this->list = new_list;
}
};
/**
* Sort by value, ascending.
*/
class ScriptListSorterValueAscending : public ScriptListSorter {
private:
ScriptList::ScriptListBucket::iterator bucket_iter; ///< The iterator over the list to find the buckets.
ScriptList::ScriptItemList *bucket_list; ///< The current bucket list we're iterator over.
ScriptList::ScriptItemList::iterator bucket_list_iter; ///< The iterator over the bucket list.
public:
/**
* Create a new sorter.
* @param list The list to sort.
*/
ScriptListSorterValueAscending(ScriptList *list)
{
this->list = list;
this->End();
}
SQInteger Begin()
{
if (this->list->buckets.empty()) return 0;
this->has_no_more_items = false;
this->bucket_iter = this->list->buckets.begin();
this->bucket_list = &(*this->bucket_iter).second;
this->bucket_list_iter = this->bucket_list->begin();
this->item_next = *this->bucket_list_iter;
SQInteger item_current = this->item_next;
FindNext();
return item_current;
}
void End()
{
this->bucket_list = nullptr;
this->has_no_more_items = true;
this->item_next = 0;
}
/**
* Find the next item, and store that information.
*/
void FindNext()
{
if (this->bucket_list == nullptr) {
this->has_no_more_items = true;
return;
}
this->bucket_list_iter++;
if (this->bucket_list_iter == this->bucket_list->end()) {
this->bucket_iter++;
if (this->bucket_iter == this->list->buckets.end()) {
this->bucket_list = nullptr;
return;
}
this->bucket_list = &(*this->bucket_iter).second;
this->bucket_list_iter = this->bucket_list->begin();
}
this->item_next = *this->bucket_list_iter;
}
SQInteger Next()
{
if (this->IsEnd()) return 0;
SQInteger item_current = this->item_next;
FindNext();
return item_current;
}
void Remove(SQInteger item)
{
if (this->IsEnd()) return;
/* If we remove the 'next' item, skip to the next */
if (item == this->item_next) {
FindNext();
return;
}
}
};
/**
* Sort by value, descending.
*/
class ScriptListSorterValueDescending : public ScriptListSorter {
private:
/* Note: We cannot use reverse_iterator.
* The iterators must only be invalidated when the element they are pointing to is removed.
* This only holds for forward iterators. */
ScriptList::ScriptListBucket::iterator bucket_iter; ///< The iterator over the list to find the buckets.
ScriptList::ScriptItemList *bucket_list; ///< The current bucket list we're iterator over.
ScriptList::ScriptItemList::iterator bucket_list_iter; ///< The iterator over the bucket list.
public:
/**
* Create a new sorter.
* @param list The list to sort.
*/
ScriptListSorterValueDescending(ScriptList *list)
{
this->list = list;
this->End();
}
SQInteger Begin()
{
if (this->list->buckets.empty()) return 0;
this->has_no_more_items = false;
/* Go to the end of the bucket-list */
this->bucket_iter = this->list->buckets.end();
--this->bucket_iter;
this->bucket_list = &(*this->bucket_iter).second;
/* Go to the end of the items in the bucket */
this->bucket_list_iter = this->bucket_list->end();
--this->bucket_list_iter;
this->item_next = *this->bucket_list_iter;
SQInteger item_current = this->item_next;
FindNext();
return item_current;
}
void End()
{
this->bucket_list = nullptr;
this->has_no_more_items = true;
this->item_next = 0;
}
/**
* Find the next item, and store that information.
*/
void FindNext()
{
if (this->bucket_list == nullptr) {
this->has_no_more_items = true;
return;
}
if (this->bucket_list_iter == this->bucket_list->begin()) {
if (this->bucket_iter == this->list->buckets.begin()) {
this->bucket_list = nullptr;
return;
}
this->bucket_iter--;
this->bucket_list = &(*this->bucket_iter).second;
/* Go to the end of the items in the bucket */
this->bucket_list_iter = this->bucket_list->end();
--this->bucket_list_iter;
} else {
this->bucket_list_iter--;
}
this->item_next = *this->bucket_list_iter;
}
SQInteger Next()
{
if (this->IsEnd()) return 0;
SQInteger item_current = this->item_next;
FindNext();
return item_current;
}
void Remove(SQInteger item)
{
if (this->IsEnd()) return;
/* If we remove the 'next' item, skip to the next */
if (item == this->item_next) {
FindNext();
return;
}
}
};
/**
* Sort by item, ascending.
*/
class ScriptListSorterItemAscending : public ScriptListSorter {
private:
ScriptList::ScriptListMap::iterator item_iter; ///< The iterator over the items in the map.
public:
/**
* Create a new sorter.
* @param list The list to sort.
*/
ScriptListSorterItemAscending(ScriptList *list)
{
this->list = list;
this->End();
}
SQInteger Begin()
{
if (this->list->items.empty()) return 0;
this->has_no_more_items = false;
this->item_iter = this->list->items.begin();
this->item_next = (*this->item_iter).first;
SQInteger item_current = this->item_next;
FindNext();
return item_current;
}
void End()
{
this->has_no_more_items = true;
}
/**
* Find the next item, and store that information.
*/
void FindNext()
{
if (this->item_iter == this->list->items.end()) {
this->has_no_more_items = true;
return;
}
this->item_iter++;
if (this->item_iter != this->list->items.end()) item_next = (*this->item_iter).first;
}
SQInteger Next()
{
if (this->IsEnd()) return 0;
SQInteger item_current = this->item_next;
FindNext();
return item_current;
}
void Remove(SQInteger item)
{
if (this->IsEnd()) return;
/* If we remove the 'next' item, skip to the next */
if (item == this->item_next) {
FindNext();
return;
}
}
};
/**
* Sort by item, descending.
*/
class ScriptListSorterItemDescending : public ScriptListSorter {
private:
/* Note: We cannot use reverse_iterator.
* The iterators must only be invalidated when the element they are pointing to is removed.
* This only holds for forward iterators. */
ScriptList::ScriptListMap::iterator item_iter; ///< The iterator over the items in the map.
public:
/**
* Create a new sorter.
* @param list The list to sort.
*/
ScriptListSorterItemDescending(ScriptList *list)
{
this->list = list;
this->End();
}
SQInteger Begin()
{
if (this->list->items.empty()) return 0;
this->has_no_more_items = false;
this->item_iter = this->list->items.end();
--this->item_iter;
this->item_next = (*this->item_iter).first;
SQInteger item_current = this->item_next;
FindNext();
return item_current;
}
void End()
{
this->has_no_more_items = true;
}
/**
* Find the next item, and store that information.
*/
void FindNext()
{
if (this->item_iter == this->list->items.end()) {
this->has_no_more_items = true;
return;
}
if (this->item_iter == this->list->items.begin()) {
/* Use 'end' as marker for 'beyond begin' */
this->item_iter = this->list->items.end();
} else {
this->item_iter--;
}
if (this->item_iter != this->list->items.end()) item_next = (*this->item_iter).first;
}
SQInteger Next()
{
if (this->IsEnd()) return 0;
SQInteger item_current = this->item_next;
FindNext();
return item_current;
}
void Remove(SQInteger item)
{
if (this->IsEnd()) return;
/* If we remove the 'next' item, skip to the next */
if (item == this->item_next) {
FindNext();
return;
}
}
};
ScriptList::ScriptList()
{
/* Default sorter */
this->sorter = new ScriptListSorterValueDescending(this);
this->sorter_type = SORT_BY_VALUE;
this->sort_ascending = false;
this->initialized = false;
this->modifications = 0;
}
ScriptList::~ScriptList()
{
delete this->sorter;
}
bool ScriptList::HasItem(SQInteger item)
{
return this->items.count(item) == 1;
}
void ScriptList::Clear()
{
this->modifications++;
this->items.clear();
this->buckets.clear();
this->sorter->End();
}
void ScriptList::AddItem(SQInteger item, SQInteger value)
{
this->modifications++;
if (this->HasItem(item)) return;
this->items[item] = value;
this->buckets[value].insert(item);
}
void ScriptList::RemoveItem(SQInteger item)
{
this->modifications++;
ScriptListMap::iterator item_iter = this->items.find(item);
if (item_iter == this->items.end()) return;
SQInteger value = item_iter->second;
this->sorter->Remove(item);
ScriptListBucket::iterator bucket_iter = this->buckets.find(value);
assert(bucket_iter != this->buckets.end());
bucket_iter->second.erase(item);
if (bucket_iter->second.empty()) this->buckets.erase(bucket_iter);
this->items.erase(item_iter);
}
SQInteger ScriptList::Begin()
{
this->initialized = true;
return this->sorter->Begin();
}
SQInteger ScriptList::Next()
{
if (!this->initialized) {
Debug(script, 0, "Next() is invalid as Begin() is never called");
return 0;
}
return this->sorter->Next();
}
bool ScriptList::IsEmpty()
{
return this->items.empty();
}
bool ScriptList::IsEnd()
{
if (!this->initialized) {
Debug(script, 0, "IsEnd() is invalid as Begin() is never called");
return true;
}
return this->sorter->IsEnd();
}
SQInteger ScriptList::Count()
{
return this->items.size();
}
SQInteger ScriptList::GetValue(SQInteger item)
{
ScriptListMap::const_iterator item_iter = this->items.find(item);
return item_iter == this->items.end() ? 0 : item_iter->second;
}
bool ScriptList::SetValue(SQInteger item, SQInteger value)
{
this->modifications++;
ScriptListMap::iterator item_iter = this->items.find(item);
if (item_iter == this->items.end()) return false;
SQInteger value_old = item_iter->second;
if (value_old == value) return true;
this->sorter->Remove(item);
ScriptListBucket::iterator bucket_iter = this->buckets.find(value_old);
assert(bucket_iter != this->buckets.end());
bucket_iter->second.erase(item);
if (bucket_iter->second.empty()) this->buckets.erase(bucket_iter);
item_iter->second = value;
this->buckets[value].insert(item);
return true;
}
void ScriptList::Sort(SorterType sorter, bool ascending)
{
this->modifications++;
if (sorter != SORT_BY_VALUE && sorter != SORT_BY_ITEM) return;
if (sorter == this->sorter_type && ascending == this->sort_ascending) return;
delete this->sorter;
switch (sorter) {
case SORT_BY_ITEM:
if (ascending) {
this->sorter = new ScriptListSorterItemAscending(this);
} else {
this->sorter = new ScriptListSorterItemDescending(this);
}
break;
case SORT_BY_VALUE:
if (ascending) {
this->sorter = new ScriptListSorterValueAscending(this);
} else {
this->sorter = new ScriptListSorterValueDescending(this);
}
break;
default: NOT_REACHED();
}
this->sorter_type = sorter;
this->sort_ascending = ascending;
this->initialized = false;
}
void ScriptList::AddList(ScriptList *list)
{
if (list == this) return;
if (this->IsEmpty()) {
/* If this is empty, we can just take the items of the other list as is. */
this->items = list->items;
this->buckets = list->buckets;
this->modifications++;
} else {
ScriptListMap *list_items = &list->items;
for (ScriptListMap::iterator iter = list_items->begin(); iter != list_items->end(); iter++) {
this->AddItem((*iter).first);
this->SetValue((*iter).first, (*iter).second);
}
}
}
void ScriptList::SwapList(ScriptList *list)
{
if (list == this) return;
this->items.swap(list->items);
this->buckets.swap(list->buckets);
Swap(this->sorter, list->sorter);
Swap(this->sorter_type, list->sorter_type);
Swap(this->sort_ascending, list->sort_ascending);
Swap(this->initialized, list->initialized);
Swap(this->modifications, list->modifications);
this->sorter->Retarget(this);
list->sorter->Retarget(list);
}
void ScriptList::RemoveAboveValue(SQInteger value)
{
this->modifications++;
for (ScriptListMap::iterator next_iter, iter = this->items.begin(); iter != this->items.end(); iter = next_iter) {
next_iter = iter; next_iter++;
if ((*iter).second > value) this->RemoveItem((*iter).first);
}
}
void ScriptList::RemoveBelowValue(SQInteger value)
{
this->modifications++;
for (ScriptListMap::iterator next_iter, iter = this->items.begin(); iter != this->items.end(); iter = next_iter) {
next_iter = iter; next_iter++;
if ((*iter).second < value) this->RemoveItem((*iter).first);
}
}
void ScriptList::RemoveBetweenValue(SQInteger start, SQInteger end)
{
this->modifications++;
for (ScriptListMap::iterator next_iter, iter = this->items.begin(); iter != this->items.end(); iter = next_iter) {
next_iter = iter; next_iter++;
if ((*iter).second > start && (*iter).second < end) this->RemoveItem((*iter).first);
}
}
void ScriptList::RemoveValue(SQInteger value)
{
this->modifications++;
for (ScriptListMap::iterator next_iter, iter = this->items.begin(); iter != this->items.end(); iter = next_iter) {
next_iter = iter; next_iter++;
if ((*iter).second == value) this->RemoveItem((*iter).first);
}
}
void ScriptList::RemoveTop(SQInteger count)
{
this->modifications++;
if (!this->sort_ascending) {
this->Sort(this->sorter_type, !this->sort_ascending);
this->RemoveBottom(count);
this->Sort(this->sorter_type, !this->sort_ascending);
return;
}
switch (this->sorter_type) {
default: NOT_REACHED();
case SORT_BY_VALUE:
for (ScriptListBucket::iterator iter = this->buckets.begin(); iter != this->buckets.end(); iter = this->buckets.begin()) {
ScriptItemList *items = &(*iter).second;
size_t size = items->size();
for (ScriptItemList::iterator iter = items->begin(); iter != items->end(); iter = items->begin()) {
if (--count < 0) return;
this->RemoveItem(*iter);
/* When the last item is removed from the bucket, the bucket itself is removed.
* This means that the iterators can be invalid after a call to RemoveItem.
*/
if (--size == 0) break;
}
}
break;
case SORT_BY_ITEM:
for (ScriptListMap::iterator iter = this->items.begin(); iter != this->items.end(); iter = this->items.begin()) {
if (--count < 0) return;
this->RemoveItem((*iter).first);
}
break;
}
}
void ScriptList::RemoveBottom(SQInteger count)
{
this->modifications++;
if (!this->sort_ascending) {
this->Sort(this->sorter_type, !this->sort_ascending);
this->RemoveTop(count);
this->Sort(this->sorter_type, !this->sort_ascending);
return;
}
switch (this->sorter_type) {
default: NOT_REACHED();
case SORT_BY_VALUE:
for (ScriptListBucket::reverse_iterator iter = this->buckets.rbegin(); iter != this->buckets.rend(); iter = this->buckets.rbegin()) {
ScriptItemList *items = &(*iter).second;
size_t size = items->size();
for (ScriptItemList::reverse_iterator iter = items->rbegin(); iter != items->rend(); iter = items->rbegin()) {
if (--count < 0) return;
this->RemoveItem(*iter);
/* When the last item is removed from the bucket, the bucket itself is removed.
* This means that the iterators can be invalid after a call to RemoveItem.
*/
if (--size == 0) break;
}
}
break;
case SORT_BY_ITEM:
for (ScriptListMap::reverse_iterator iter = this->items.rbegin(); iter != this->items.rend(); iter = this->items.rbegin()) {
if (--count < 0) return;
this->RemoveItem((*iter).first);
}
break;
}
}
void ScriptList::RemoveList(ScriptList *list)
{
this->modifications++;
if (list == this) {
Clear();
} else {
ScriptListMap *list_items = &list->items;
for (ScriptListMap::iterator iter = list_items->begin(); iter != list_items->end(); iter++) {
this->RemoveItem((*iter).first);
}
}
}
void ScriptList::KeepAboveValue(SQInteger value)
{
this->modifications++;
for (ScriptListMap::iterator next_iter, iter = this->items.begin(); iter != this->items.end(); iter = next_iter) {
next_iter = iter; next_iter++;
if ((*iter).second <= value) this->RemoveItem((*iter).first);
}
}
void ScriptList::KeepBelowValue(SQInteger value)
{
this->modifications++;
for (ScriptListMap::iterator next_iter, iter = this->items.begin(); iter != this->items.end(); iter = next_iter) {
next_iter = iter; next_iter++;
if ((*iter).second >= value) this->RemoveItem((*iter).first);
}
}
void ScriptList::KeepBetweenValue(SQInteger start, SQInteger end)
{
this->modifications++;
for (ScriptListMap::iterator next_iter, iter = this->items.begin(); iter != this->items.end(); iter = next_iter) {
next_iter = iter; next_iter++;
if ((*iter).second <= start || (*iter).second >= end) this->RemoveItem((*iter).first);
}
}
void ScriptList::KeepValue(SQInteger value)
{
this->modifications++;
for (ScriptListMap::iterator next_iter, iter = this->items.begin(); iter != this->items.end(); iter = next_iter) {
next_iter = iter; next_iter++;
if ((*iter).second != value) this->RemoveItem((*iter).first);
}
}
void ScriptList::KeepTop(SQInteger count)
{
this->modifications++;
this->RemoveBottom(this->Count() - count);
}
void ScriptList::KeepBottom(SQInteger count)
{
this->modifications++;
this->RemoveTop(this->Count() - count);
}
void ScriptList::KeepList(ScriptList *list)
{
if (list == this) return;
this->modifications++;
ScriptList tmp;
tmp.AddList(this);
tmp.RemoveList(list);
this->RemoveList(&tmp);
}
SQInteger ScriptList::_get(HSQUIRRELVM vm)
{
if (sq_gettype(vm, 2) != OT_INTEGER) return SQ_ERROR;
SQInteger idx;
sq_getinteger(vm, 2, &idx);
ScriptListMap::const_iterator item_iter = this->items.find(idx);
if (item_iter == this->items.end()) return SQ_ERROR;
sq_pushinteger(vm, item_iter->second);
return 1;
}
SQInteger ScriptList::_set(HSQUIRRELVM vm)
{
if (sq_gettype(vm, 2) != OT_INTEGER) return SQ_ERROR;
if (sq_gettype(vm, 3) != OT_INTEGER && sq_gettype(vm, 3) != OT_NULL) {
return sq_throwerror(vm, "you can only assign integers to this list");
}
SQInteger idx, val;
sq_getinteger(vm, 2, &idx);
if (sq_gettype(vm, 3) == OT_NULL) {
this->RemoveItem(idx);
return 0;
}
sq_getinteger(vm, 3, &val);
if (!this->HasItem(idx)) {
this->AddItem(idx, val);
return 0;
}
this->SetValue(idx, val);
return 0;
}
SQInteger ScriptList::_nexti(HSQUIRRELVM vm)
{
if (sq_gettype(vm, 2) == OT_NULL) {
if (this->IsEmpty()) {
sq_pushnull(vm);
return 1;
}
sq_pushinteger(vm, this->Begin());
return 1;
}
SQInteger idx;
sq_getinteger(vm, 2, &idx);
SQInteger val = this->Next();
if (this->IsEnd()) {
sq_pushnull(vm);
return 1;
}
sq_pushinteger(vm, val);
return 1;
}
SQInteger ScriptList::Valuate(HSQUIRRELVM vm)
{
this->modifications++;
/* The first parameter is the instance of ScriptList. */
int nparam = sq_gettop(vm) - 1;
if (nparam < 1) {
return sq_throwerror(vm, "You need to give at least a Valuator as parameter to ScriptList::Valuate");
}
/* Make sure the valuator function is really a function, and not any
* other type. It's parameter 2 for us, but for the user it's the
* first parameter they give. */
SQObjectType valuator_type = sq_gettype(vm, 2);
if (valuator_type != OT_CLOSURE && valuator_type != OT_NATIVECLOSURE) {
return sq_throwerror(vm, "parameter 1 has an invalid type (expected function)");
}
/* Don't allow docommand from a Valuator, as we can't resume in
* mid C++-code. */
bool backup_allow = ScriptObject::GetAllowDoCommand();
ScriptObject::SetAllowDoCommand(false);
/* Push the function to call */
sq_push(vm, 2);
for (ScriptListMap::iterator iter = this->items.begin(); iter != this->items.end(); iter++) {
/* Check for changing of items. */
int previous_modification_count = this->modifications;
/* Push the root table as instance object, this is what squirrel does for meta-functions. */
sq_pushroottable(vm);
/* Push all arguments for the valuator function. */
sq_pushinteger(vm, (*iter).first);
for (int i = 0; i < nparam - 1; i++) {
sq_push(vm, i + 3);
}
/* Call the function. Squirrel pops all parameters and pushes the return value. */
if (SQ_FAILED(sq_call(vm, nparam + 1, SQTrue, SQTrue))) {
ScriptObject::SetAllowDoCommand(backup_allow);
return SQ_ERROR;
}
/* Retrieve the return value */
SQInteger value;
switch (sq_gettype(vm, -1)) {
case OT_INTEGER: {
sq_getinteger(vm, -1, &value);
break;
}
case OT_BOOL: {
SQBool v;
sq_getbool(vm, -1, &v);
value = v ? 1 : 0;
break;
}
default: {
/* See below for explanation. The extra pop is the return value. */
sq_pop(vm, nparam + 4);
ScriptObject::SetAllowDoCommand(backup_allow);
return sq_throwerror(vm, "return value of valuator is not valid (not integer/bool)");
}
}
/* Kill the script when the valuator call takes way too long.
* Triggered by nesting valuators, which then take billions of iterations. */
if (ScriptController::GetOpsTillSuspend() < -1000000) {
/* See below for explanation. The extra pop is the return value. */
sq_pop(vm, nparam + 4);
ScriptObject::SetAllowDoCommand(backup_allow);
return sq_throwerror(vm, "excessive CPU usage in valuator function");
}
/* Was something changed? */
if (previous_modification_count != this->modifications) {
/* See below for explanation. The extra pop is the return value. */
sq_pop(vm, nparam + 4);
ScriptObject::SetAllowDoCommand(backup_allow);
return sq_throwerror(vm, "modifying valuated list outside of valuator function");
}
this->SetValue((*iter).first, value);
/* Pop the return value. */
sq_poptop(vm);
Squirrel::DecreaseOps(vm, 5);
}
/* Pop from the squirrel stack:
* 1. The root stable (as instance object).
* 2. The valuator function.
* 3. The parameters given to this function.
* 4. The ScriptList instance object. */
sq_pop(vm, nparam + 3);
ScriptObject::SetAllowDoCommand(backup_allow);
return 0;
}
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