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//
// MCIterator.h
// mailcore2
//
// Created by DINH Viêt Hoà on 4/18/13.
// Copyright (c) 2013 MailCore. All rights reserved.
//
#ifndef MAILCORE_ITERATOR_H
#define MAILCORE_ITERATOR_H
#include <MailCore/MCArray.h>
#include <MailCore/MCHashMap.h>
#include <MailCore/MCIndexSet.h>
#include <MailCore/MCAutoreleasePool.h>
#include <MailCore/MCAssert.h>
#include <string.h>
#ifdef __cplusplus
#define mc_foreacharray(type, __variable, __array) \
type * __variable; \
mailcore::ArrayIterator __variable##__iterator = mailcore::ArrayIteratorInit(__array); \
for (; NULL != (__variable = (type *) mailcore::ArrayIteratorNext(&__variable##__iterator)); )
#define mc_foreacharrayIndex(__index, type, __variable, __array) \
type * __variable; \
mailcore::ArrayIterator __variable##__iterator = mailcore::ArrayIteratorInit(__array); \
for (unsigned int __index = 0; NULL != (__variable = (type *) mailcore::ArrayIteratorNext(&__variable##__iterator)); __index++)
#define mc_foreachhashmapKey(keyType, __key, __hashmap) \
keyType * __key; \
HashMapIterator __key##__iterator = HashMapIteratorInit(__hashmap, true, false); \
while (HashMapIteratorRun(&__key##__iterator)) \
while (HashMapIteratorNext(&__key##__iterator, (Object **) &__key, (Object **) NULL))
#define mc_foreachhashmapValue(valueType, __value, __hashmap) \
valueType * __value; \
HashMapIterator __value##__iterator = HashMapIteratorInit(__hashmap, false, true); \
while (HashMapIteratorRun(&__value##__iterator)) \
while (HashMapIteratorNext(&__value##__iterator, (Object **) NULL, (Object **) &__value))
#define mc_foreachhashmapKeyAndValue(keyType, __key, valueType, __value, __hashmap) \
keyType * __key; \
valueType * __value; \
HashMapIterator __key##__value##__iterator = HashMapIteratorInit(__hashmap, true, true); \
while (HashMapIteratorRun(&__key##__value##__iterator)) \
while (HashMapIteratorNext(&__key##__value##__iterator, (Object **) &__key, (Object **) &__value))
#define mc_foreachindexset(__variable, __indexset) \
int64_t __variable; \
mailcore::IndexSetIterator __variable##__iterator = mailcore::IndexSetIteratorInit(__indexset); \
for (; (__variable = IndexSetIteratorValue(&__variable##__iterator)), IndexSetIteratorIsValid(&__variable##__iterator) ; mailcore::IndexSetIteratorNext(&__variable##__iterator))
namespace mailcore {
struct IndexSetIterator {
unsigned int rangeIndex;
unsigned int index;
Range * currentRange;
IndexSet * indexSet;
};
static inline IndexSetIterator IndexSetIteratorInit(IndexSet * indexSet)
{
IndexSetIterator iterator = { 0, 0, NULL, indexSet };
if (indexSet->rangesCount() >= 1) {
iterator.currentRange = &indexSet->allRanges()[0];
}
return iterator;
}
static inline bool IndexSetIteratorIsValid(IndexSetIterator * iterator)
{
return iterator->currentRange != NULL;
}
static inline int64_t IndexSetIteratorValue(IndexSetIterator * iterator)
{
return iterator->currentRange == NULL ? -1 : iterator->currentRange->location + iterator->index;
}
static inline bool IndexSetIteratorNext(IndexSetIterator * iterator)
{
iterator->index ++;
if (iterator->index > iterator->currentRange->length) {
// switch to an other range
iterator->index = 0;
iterator->rangeIndex ++;
if (iterator->rangeIndex >= iterator->indexSet->rangesCount()) {
iterator->currentRange = NULL;
return false;
}
else {
iterator->currentRange = &iterator->indexSet->allRanges()[iterator->rangeIndex];
return true;
}
}
else {
return true;
}
}
struct ArrayIterator {
unsigned index;
unsigned count;
Array * array;
};
static inline ArrayIterator ArrayIteratorInit(Array * array)
{
ArrayIterator iterator = { 0, array != NULL ? array->count() : 0, array };
return iterator;
}
static inline Object * ArrayIteratorNext(ArrayIterator * iterator)
{
if (iterator->index >= iterator->count) {
return NULL;
}
Object * result = iterator->array->objectAtIndex(iterator->index);
++ iterator->index;
return result;
}
struct HashMapIterator {
bool cleanup;
unsigned index;
unsigned count;
Array * keys;
Array * values;
};
static inline HashMapIterator HashMapIteratorInit(HashMap * hashmap, bool useKeys, bool useValues)
{
AutoreleasePool * pool = new AutoreleasePool();
Array * keys = useKeys ? (hashmap != NULL ? hashmap->allKeys() : NULL) : NULL;
Array * values = useValues ? (hashmap != NULL ? hashmap->allValues() : NULL) : NULL;
if (keys != NULL) {
keys->retain();
}
if (values != NULL) {
values->retain();
}
HashMapIterator iterator = { false, 0, hashmap != NULL ? hashmap->count() : 0, keys, values };
pool->release();
return iterator;
}
static inline bool HashMapIteratorNext(HashMapIterator * iterator, Object ** keyp, Object ** valuep)
{
if (iterator->index >= iterator->count) {
return false;
}
if (keyp != NULL) {
MCAssert(iterator->keys != NULL);
* keyp = iterator->keys->objectAtIndex(iterator->index);
}
if (valuep != NULL) {
MCAssert(iterator->values != NULL);
* valuep = iterator->values->objectAtIndex(iterator->index);
}
iterator->index ++;
return true;
}
static inline bool HashMapIteratorRun(HashMapIterator * iterator)
{
if (!iterator->cleanup) {
iterator->cleanup = true;
return true;
} else {
MC_SAFE_RELEASE(iterator->keys);
MC_SAFE_RELEASE(iterator->values);
return false;
}
}
};
#endif
#endif
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