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| version 1.30, 2001/03/24 19:12:18 | version 1.57.2.19, 2003/02/04 09:44:27 |
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| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: array class decl. | Parser: Array & Array_iterator classes decls. |
| Copyright (c) 2001 ArtLebedev Group (http://www.artlebedev.com) | Copyright (c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com) |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | |
| Author: Alexander Petrosyan <paf@design.ru> (http://design.ru/paf) | |
| $Id$ | |
| */ | */ |
| #ifndef PA_ARRAY_H | #ifndef PA_ARRAY_H |
| #define PA_ARRAY_H | #define PA_ARRAY_H |
| #include <stddef.h> | static const char* IDENT_ARRAY_Y="$Date$"; |
| #include "pa_pool.h" | #include "pa_pool.h" |
| #include "pa_types.h" | #include "pa_exception.h" |
| #include "pa_string.h" | |
| template<typename T> class Array_iterator; | |
| /** | /** |
| Pooled Array. | Simple Array. |
| Internal structure: | |
| @verbatim | |
| Array Chunk0 | |
| ====== ======== | |
| head--------------->[ptr] | |
| append_here-------->[ptr] | |
| link_row ........ | |
| . . | |
| . [ptr] | |
| ...........>[link to the next chunk] | |
| @endverbatim | |
| */ | */ |
| template<typename T> class Array: public PA_Object { | |
| class Array : public Pooled { | friend class Array_iterator<T>; |
| public: | |
| protected: | |
| /// Array item type | // default expand delta size |
| typedef void Item; | int fdelta; |
| /// for_each iterator function type | /// elements[growing size] here |
| typedef void (*For_each_func)(Item *value, void *info); | T *felements; |
| /// first_that iterator function type | // allocated size |
| typedef bool (*First_that_func)(Item *value, const void *info); | int fallocated; |
| enum { | // array size |
| CR_INITIAL_ROWS_DEFAULT=10, ///< default preallocated row count | int fused; |
| CR_GROW_PERCENT=60 ///< each time the Array chunk_is_full() array expanded() | |
| }; | |
| public: | public: |
| typedef T element_type; | |
| Array(Pool& apool, int initial_rows=CR_INITIAL_ROWS_DEFAULT); | Array(int initial=3, int delta=1): |
| fallocated(initial?initial:3), | |
| fdelta(delta), | |
| fused(0) | |
| { | |
| if(fallocated<=0 || fdelta<1) | |
| throw Exception(0, | |
| Exception::undefined_source, | |
| "Array::Array(%d, %d) too small", initial, delta); | |
| /// size Array. how many items are in it | felements=new T[fallocated]; |
| int size() const { | |
| // for get and quick_get | |
| cache_chunk_base=0; | |
| cache_chunk=head; | |
| return fused_rows; | |
| } | } |
| /// append Item to array | override ~Array() { |
| Array& operator += (Item *src); | T *last=felements+fused; |
| for(T *current=felements; current<last; current++) | |
| delete current; | |
| /// dirty hack to allow constant items storage. I long for Array<const Item*> | delete felements; |
| Array& operator += (const Item *src) { return *this+=const_cast<Item*>(src); } | } |
| /// append other Array portion to this one. starting from offset | /// how many items are in Array |
| Array& append_array(const Array& src, int offset=0); | int count() const { return fused; } |
| /// append to array | |
| Array& operator += (T src) { | |
| if(is_full()) | |
| expand(fdelta); | |
| /** | felements[fused++]=src; |
| quickly gets some item considering... | |
| these true: | return *this; |
| - index increments from 0 to size()-1 | } |
| - index>=0 && index<size() | |
| - index>=cache_chunk_base | /// append other Array portion to this one. starting from offset |
| */ | Array& append(const Array& src, int offset=0, int limit=0) { |
| Item *quick_get(int index) const { | if(!(offset>=0 && offset<src.count())) { |
| // next chunk will be with "index" row | throw Exception(0, |
| if(!(index<cache_chunk_base+cache_chunk->count)) { | Exception::undefined_source, |
| int count=cache_chunk->count; | "Array::append(offset=%d) out of range [0..%d]", offset, src.count()-1); |
| cache_chunk_base+=count; | //return 0; // never |
| cache_chunk=cache_chunk->rows[count].link; | |
| } | } |
| // fix limit | |
| return cache_chunk->rows[index-cache_chunk_base].item; | { |
| int m=src.count()-offset; | |
| if(!m || limit<0) | |
| return *this; | |
| if(!limit || limit>m) | |
| limit=m; | |
| } | |
| int needed=limit-(fallocated-fused); | |
| if(needed>0) | |
| expand(needed); | |
| memcpy(&felements[fused+=limit], &src.felements[offset], limit*sizeof(T)); | |
| return *this; | |
| } | } |
| Item *get(int index) const; | /// get index-element |
| void put(int index, Item *item); | T& get(int index) { |
| /// convinient way to get strings from Array. I long for Array<const String *> | if(!(index>=0 && index<count())) { |
| const String *get_string(int index) const { | throw Exception(0, |
| return const_cast<const String *>(static_cast<String *>(get(index))); | Exception::undefined_source, |
| "Array::get(%d) out of range [0..%d]", index, count()-1); | |
| return felements[0]; // never | |
| } | |
| return felements[index]; | |
| } | } |
| /// iterate over all elements | T& operator [](int index) { return get(index); } |
| void for_each(For_each_func func, void *info=0); | |
| /// iterate over all elements until condition | /// put index-element |
| void* first_that(First_that_func func, const void *info=0); | void put(int index, T& element) { |
| if(!(index>=0 && index<count())) { | |
| throw Exception(0, | |
| Exception::undefined_source, | |
| "Array::put(%d) out of range [0..%d]", index, count()-1); | |
| return; // never | |
| } | |
| felements[index]=element; | |
| } | |
| private: | |
| struct Chunk { | /// iterate over all elements |
| // the number of rows in chunk | template<typename I> void for_each(void (*callback)(T, I), I info) const { |
| int count; | T *last=felements+fused; |
| union Row { | for(T *current=felements; current<last; current++) |
| Item *item; | callback(*current, info); |
| Chunk *link; // link to the next chunk in chain | } |
| } rows[1]; | |
| // next rows are here | |
| } | |
| *head; // the head chunk of the chunk chain | |
| // last allocated chunk | |
| // helps appending Arrays | |
| Chunk *tail; | |
| // next append would write to this record | |
| Chunk::Row *append_here; | |
| // the address of place where lies address | |
| // of the link to the next chunk to allocate | |
| Chunk::Row *link_row; | |
| private: | /// iterate over all elements until condition becomes true, return that element |
| template<typename I> T first_that(bool (*callback)(T, I), I info) const { | |
| T *last=felements+fused; | |
| for(T *current=felements; current<last; current++) | |
| if(callback(*current, info)) | |
| return *current; | |
| // array size | return 0;//T(0); |
| int fused_rows; | } |
| mutable int cache_chunk_base; | protected: |
| mutable Chunk *cache_chunk; | |
| private: | |
| bool chunk_is_full() { | bool is_full() { |
| return append_here == link_row; | return fused == fallocated; |
| } | |
| void expand(int delta) { | |
| fallocated+=delta; | |
| felements = (T *)realloc(felements, fallocated*sizeof(T)); | |
| } | } |
| void expand(int chunk_rows); | |
| private: //disabled | private: //disabled |
| //Array(Array&) { } | |
| Array& operator = (const Array&) { return *this; } | Array& operator = (const Array&) { return *this; } |
| }; | }; |
| typedef smart_ptr<char> CharPtr; | |
| class Pool: public Array<CharPtr> { | |
| public: | |
| char *malloc(size_t size) { | |
| CharPtr result=CharPtr((char *)Array<CharPtr>::malloc(size)); | |
| *this += result; | |
| return result.get(); | |
| } | |
| char *copy(const char* buf, size_t size=0) { | |
| if(!size) | |
| size=strlen(buf)+1; | |
| char *result=malloc(size); | |
| memcpy(result, buf, size); | |
| return result; | |
| } | |
| }; | |
| inline void *operator new[] (size_t size, Pool& pool) { | |
| return pool.malloc(size); | |
| } | |
| /// handy array iterator | |
| template<typename T> class Array_iterator { | |
| Array<T>& farray; | |
| T *fcurrent; | |
| T *flast; | |
| public: | |
| Array_iterator(Array<T>& aarray): farray(aarray) { | |
| fcurrent=farray.felements; | |
| flast=farray.felements+farray.count(); | |
| } | |
| /// there are still elements | |
| bool has_next() { | |
| return fcurrent<flast; | |
| } | |
| /// quickly extracts next Array element | |
| T& next() { | |
| return *(fcurrent++); | |
| } | |
| }; | |
| #endif | #endif |