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| version 1.67, 2007/05/18 12:44:00 | version 1.80, 2009/12/04 04:19:58 |
|---|---|
| Line 1 | Line 1 |
| /** @file | /** @file |
| Parser: hash class decl. | Parser: hash class decl. |
| Copyright (c) 2001-2005 ArtLebedev Group (http://www.artlebedev.com) | Copyright (c) 2001-2009 ArtLebedev Group (http://www.artlebedev.com) |
| Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) | Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) |
| */ | */ |
| Line 21 static const char * const IDENT_HASH_H=" | Line 21 static const char * const IDENT_HASH_H=" |
| #include "pa_memory.h" | #include "pa_memory.h" |
| #include "pa_types.h" | #include "pa_types.h" |
| #include "pa_string.h" | |
| const int HASH_ALLOCATES_COUNT=29; | const int HASH_ALLOCATES_COUNT=29; |
| Line 34 static uint Hash_allocates[HASH_ALLOCATE | Line 35 static uint Hash_allocates[HASH_ALLOCATE |
| 2097397, 4194103, 8388857, 16777447, 33554201, 67108961, | 2097397, 4194103, 8388857, 16777447, 33554201, 67108961, |
| 134217487, 268435697, 536870683, 1073741621, 2147483399}; | 134217487, 268435697, 536870683, 1073741621, 2147483399}; |
| /// useful generic hash function | |
| inline void generic_hash_code(uint& result, char c) { | |
| result=(result<<4)+c; | |
| if(uint g=(result&0xF0000000)) { | |
| result=result^(g>>24); | |
| result=result^g; | |
| } | |
| } | |
| /// useful generic hash function | |
| inline void generic_hash_code(uint& result, const char* s) { | |
| while(char c=*s++) { | |
| result=(result<<4)+c; | |
| if(uint g=(result&0xF0000000)) { | |
| result=result^(g>>24); | |
| result=result^g; | |
| } | |
| } | |
| } | |
| /// useful generic hash function | |
| inline void generic_hash_code(uint& result, const char* buf, size_t size) { | |
| const char* end=buf+size; | |
| while(buf<end) { | |
| result=(result<<4)+*buf++; | |
| if(uint g=(result&0xF0000000)) { | |
| result=result^(g>>24); | |
| result=result^g; | |
| } | |
| } | |
| } | |
| /// simple hash code of int. used by EXIF mapping | |
| inline uint hash_code(int self) { | |
| uint result=0; | |
| generic_hash_code(result, (const char*)&self, sizeof(self)); | |
| return result; | |
| } | |
| #endif // PA_HASH_H | |
| #ifndef PA_HASH_CLASS | |
| #define PA_HASH_CLASS | |
| /** | /** |
| Simple hash. | Simple hash. |
| Line 42 static uint Hash_allocates[HASH_ALLOCATE | Line 85 static uint Hash_allocates[HASH_ALLOCATE |
| get returning 0 means there were no such. | get returning 0 means there were no such. |
| "put value 0" means "remove" | "put value 0" means "remove" |
| */ | */ |
| template<typename K, typename V> class Hash: public PA_Object { | #ifdef HASH_ORDER |
| #undef HASH | |
| #undef HASH_STRING | |
| #undef HASH_NEW_PAIR | |
| #undef HASH_FOR_EACH | |
| #define HASH OrderedHash | |
| #define HASH_STRING OrderedHashString | |
| #define HASH_NEW_PAIR(code, key, value) *ref=new Pair(code, key, value, *ref, this->last); this->last=&((*ref)->next) | |
| #define HASH_FOR_EACH \ | |
| for(Pair *pair=this->first; pair; pair=pair->next) | |
| #else | |
| #define HASH Hash | |
| #define HASH_STRING HashString | |
| #define HASH_NEW_PAIR(code, key, value) *ref=new Pair(code, key, value, *ref) | |
| #define HASH_FOR_EACH \ | |
| Pair **ref=this->refs; \ | |
| for(int index=0; index<this->allocated; index++) \ | |
| for(Pair *pair=*ref++; pair; pair=pair->link) | |
| #endif | |
| template<typename K, typename V> class HASH: public PA_Object { | |
| public: | public: |
| typedef K key_type; | typedef K key_type; |
| typedef V value_type; | typedef V value_type; |
| Hash() { | HASH() { |
| allocated=Hash_allocates[allocates_index=0]; | allocated=Hash_allocates[allocates_index=0]; |
| threshold=allocated*THRESHOLD_PERCENT/100; | threshold=allocated*THRESHOLD_PERCENT/100; |
| fpairs_count=fused_refs=0; | fpairs_count=fused_refs=0; |
| refs=new(UseGC) Pair*[allocated]; | refs=new(UseGC) Pair*[allocated]; |
| #ifdef HASH_ORDER | |
| first=0; | |
| last=&first; | |
| #endif | |
| } | } |
| Hash(const Hash& source) { | HASH(const HASH& source) { |
| allocates_index=source.allocates_index; | allocates_index=source.allocates_index; |
| allocated=source.allocated; | allocated=source.allocated; |
| threshold=source.threshold; | threshold=source.threshold; |
| fused_refs=source.fused_refs; | fused_refs=source.fused_refs; |
| fpairs_count=source.fpairs_count; | fpairs_count=source.fpairs_count; |
| refs=new(UseGC) Pair*[allocated]; | refs=new(UseGC) Pair*[allocated]; |
| #ifdef HASH_ORDER | |
| first=0; | |
| last=&first; | |
| #endif | |
| // clone & rehash | // clone & rehash |
| Pair **old_ref=source.refs; | Pair **old_ref=source.refs; |
| for(int index=0; index<allocated; index++) | for(int index=0; index<allocated; index++) |
| for(Pair *pair=*old_ref++; pair; ) { | for(Pair *pair=*old_ref++; pair; ) { |
| Pair *next=pair->link; | Pair *next=pair->link; |
| Pair **new_ref=&refs[index]; | Pair **ref=&refs[index]; |
| *new_ref=new Pair(pair->code, pair->key, pair->value, *new_ref); | HASH_NEW_PAIR(pair->code, pair->key, pair->value); |
| pair=next; | pair=next; |
| } | } |
| } | } |
| #ifdef USE_DESTRUCTORS | |
| ~HASH() { | |
| Pair **ref=refs; | |
| for(int index=0; index<allocated; index++) | |
| for(Pair *pair=*ref++; pair;){ | |
| Pair *next=pair->link; | |
| delete pair; | |
| pair=next; | |
| } | |
| delete[] refs; | |
| } | |
| #endif | |
| /// put a [value] under the [key] @returns existed or not | /// put a [value] under the [key] @returns existed or not |
| bool put(K key, V value) { | bool put(K key, V value) { |
| if(!value) { | if(!value) { |
| Line 98 public: | Line 188 public: |
| // proper pair not found -- create&link_in new pair | // proper pair not found -- create&link_in new pair |
| if(!*ref) // root cell were fused_refs? | if(!*ref) // root cell were fused_refs? |
| fused_refs++; // not, we'll use it and record the fact | fused_refs++; // not, we'll use it and record the fact |
| *ref=new Pair(code, key, value, *ref); | HASH_NEW_PAIR(code, key, value); |
| fpairs_count++; | fpairs_count++; |
| return false; | return false; |
| } | } |
| /// put a [value] under the [key] @returns existed or not | |
| template<typename R, typename F, typename I> R replace_maybe_append(K key, V value, F prevent, I info) { | |
| if(!value) { | |
| // they can come here from somewhere (true with maybe_replace_maybe_append, keeping parallel) | |
| remove(key); | |
| // this has nothing to do with properties, doing no special property handling here | |
| return 0; | |
| } | |
| if(is_full()) | |
| expand(); | |
| uint code=hash_code(key); | |
| uint index=code%allocated; | |
| Pair **ref=&refs[index]; | |
| for(Pair *pair=*ref; pair; pair=pair->link) | |
| if(pair->code==code && pair->key==key) { | |
| // found a pair with the same key | |
| pair->value=value; | |
| return reinterpret_cast<R>(1); | |
| } | |
| // proper pair not found | |
| // prevent-function intercepted append? | |
| if(R result=prevent(value, info)) | |
| return result; | |
| //create&link_in new pair | |
| if(!*ref) // root cell were fused_refs? | |
| fused_refs++; // not, we'll use it and record the fact | |
| *ref=new Pair(code, key, value, *ref); | |
| fpairs_count++; | |
| return 0; | |
| } | |
| /// put a [value] under the [key] @returns existed or not | |
| template<typename R, typename F1, typename F2, typename I> | |
| R maybe_replace_maybe_append(K key, V value, F1 prevent_replace, F2 prevent_append, I info) | |
| { | |
| if(!value) { | |
| // they can come here from Temp_value_element::dctor to restore some empty value | |
| remove(key); | |
| // this has nothing to do with properties, doing no special property handling here | |
| return 0; | |
| } | |
| if(is_full()) | |
| expand(); | |
| uint code=hash_code(key); | |
| uint index=code%allocated; | |
| Pair **ref=&refs[index]; | |
| for(Pair *pair=*ref; pair; pair=pair->link) | |
| if(pair->code==code && pair->key==key) { | |
| // found a pair with the same key | |
| // prevent-function intercepted replace? | |
| if(R result=prevent_replace(pair->value, info)) | |
| return result; | |
| pair->value=value; | |
| return reinterpret_cast<R>(1); | |
| } | |
| // proper pair not found | |
| // prevent-function intercepted append? | |
| if(R result=prevent_append(value, info)) | |
| return result; | |
| //create&link_in new pair | |
| if(!*ref) // root cell were fused_refs? | |
| fused_refs++; // not, we'll use it and record the fact | |
| *ref=new Pair(code, key, value, *ref); | |
| fpairs_count++; | |
| return 0; | |
| } | |
| /// put a [value] under the [key] @returns existed or not | |
| template<typename R, typename F1, typename I> | |
| R maybe_replace_never_append(K key, V value, F1 prevent_replace, I info) | |
| { | |
| if(!value) { | |
| // they can come here from somewhere (true with maybe_replace_maybe_append, keeping parallel) | |
| remove(key); | |
| // this has nothing to do with properties, doing no special property handling here | |
| return 0; | |
| } | |
| if(is_full()) | |
| expand(); | |
| uint code=hash_code(key); | |
| uint index=code%allocated; | |
| Pair **ref=&refs[index]; | |
| for(Pair *pair=*ref; pair; pair=pair->link) | |
| if(pair->code==code && pair->key==key) { | |
| // found a pair with the same key | |
| // prevent-function intercepted replace? | |
| if(R result=prevent_replace(pair->value, info)) | |
| return result; | |
| pair->value=value; | |
| return reinterpret_cast<R>(1); | |
| } | |
| return 0; | |
| } | |
| /// remove the [key] @returns existed or not | /// remove the [key] @returns existed or not |
| bool remove(K key) { | bool remove(K key) { |
| uint code=hash_code(key); | uint code=hash_code(key); |
| uint index=code%allocated; | uint index=code%allocated; |
| for(Pair **ref=&refs[index]; *ref; ref=&(*ref)->link) | for(Pair **ref=&refs[index]; *ref; ref=&(*ref)->link){ |
| if((*ref)->code==code && (*ref)->key==key) { | Pair *pair=*ref; |
| if(pair->code==code && pair->key==key) { | |
| // found a pair with the same key | // found a pair with the same key |
| Pair *next=(*ref)->link; | Pair *next=pair->link; |
| delete *ref; | #ifdef HASH_ORDER |
| *(pair->prev)=pair->next; | |
| if(pair->next) | |
| pair->next->prev=pair->prev; | |
| else | |
| last=pair->prev; | |
| #endif | |
| delete pair; | |
| *ref=next; | *ref=next; |
| --fpairs_count; | --fpairs_count; |
| return true; | return true; |
| } | } |
| } | |
| return false; | return false; |
| } | } |
| /// returns exist key or not | /// return true if key exists |
| bool contain(K key){ | bool contains(K key){ |
| uint code=hash_code(key); | uint code=hash_code(key); |
| uint index=code%allocated; | uint index=code%allocated; |
| for(Pair **ref=&refs[index]; *ref; ref=&(*ref)->link){ | for(Pair *pair=refs[index]; pair; pair=pair->link){ |
| if((*ref)->code==code && (*ref)->key==key) { | if(pair->code==code && pair->key==key) |
| return true; | return true; |
| } | |
| } | } |
| return false; | return false; |
| } | } |
| /// get associated [value] by the [key] | /// get associated [value] by the [key] |
| V get(K key) const { | V get(K key) const { |
| uint code=hash_code(key); | uint code=hash_code(key); |
| Line 253 public: | Line 241 public: |
| return V(0); | return V(0); |
| } | } |
| /// put a [value] under the [key] if that [key] existed @returns existed or not | /// put a [value] under the [key] if that [key] existed @returns existed or not |
| bool put_replaced(K key, V value) { | bool put_replaced(K key, V value) { |
| if(!value) { | if(!value) { |
| Line 273 public: | Line 261 public: |
| return false; | return false; |
| } | } |
| /// put a [value] under the [key] if that [key] existed @returns existed or not | |
| template<typename R, typename F> R maybe_put_replaced(K key, V value, F prevent) { | |
| if(!value) { | |
| // they can come here from Temp_value_element::dctor to restore some empty value | |
| remove(key); | |
| // this has nothing to do with properties, doing no special property handling here | |
| return 0; | |
| } | |
| uint code=hash_code(key); | |
| uint index=code%allocated; | |
| for(Pair *pair=refs[index]; pair; pair=pair->link) | |
| if(pair->code==code && pair->key==key) { | |
| // found a pair with the same key, replacing | |
| // prevent-function intercepted put? | |
| if(R result=prevent(pair->value)) | |
| return result; | |
| pair->value=value; | |
| return reinterpret_cast<R>(1); | |
| } | |
| // proper pair not found | |
| return 0; | |
| } | |
| /// put a [value] under the [key] if that [key] NOT existed @returns existed or not | /// put a [value] under the [key] if that [key] NOT existed @returns existed or not |
| bool put_dont_replace(K key, V value) { | bool put_dont_replace(K key, V value) { |
| if(!value) { | if(!value) { |
| Line 320 public: | Line 282 public: |
| // proper pair not found -- create&link_in new pair | // proper pair not found -- create&link_in new pair |
| if(!*ref) // root cell were fused_refs? | if(!*ref) // root cell were fused_refs? |
| fused_refs++; // not, we'll use it and record the fact | fused_refs++; // not, we'll use it and record the fact |
| *ref=new Pair(code, key, value, *ref); | HASH_NEW_PAIR(code, key, value); |
| fpairs_count++; | fpairs_count++; |
| return false; | return false; |
| } | } |
| /** put all 'src' values if NO with same key existed | /// put all 'src' values if NO with same key existed |
| @todo optimize this.allocated==src.allocated case | void merge_dont_replace(const HASH& src) { |
| */ | #ifdef HASH_ORDER |
| void merge_dont_replace(const Hash& src) { | for(Pair *pair=src.first; pair; pair=pair->next) |
| #else | |
| for(int i=0; i<src.allocated; i++) | for(int i=0; i<src.allocated; i++) |
| for(Pair *pair=src.refs[i]; pair; pair=pair->link) | for(Pair *pair=src.refs[i]; pair; pair=pair->link) |
| #endif | |
| put_dont_replace(pair->key, pair->value); | put_dont_replace(pair->key, pair->value); |
| } | } |
| Line 339 public: | Line 303 public: |
| /// iterate over all pairs | /// iterate over all pairs |
| template<typename I> void for_each(void callback(K, V, I), I info) const { | template<typename I> void for_each(void callback(K, V, I), I info) const { |
| Pair **ref=refs; | HASH_FOR_EACH |
| for(int index=0; index<allocated; index++) | callback(pair->key, pair->value, info); |
| for(Pair *pair=*ref++; pair; pair=pair->link) | |
| callback(pair->key, pair->value, info); | |
| } | } |
| /// iterate over all pairs | /// iterate over all pairs |
| template<typename I> void for_each_ref(void callback(K, V&, I), I info) const { | template<typename I> void for_each_ref(void callback(K, V&, I), I info) const { |
| Pair **ref=refs; | HASH_FOR_EACH |
| for(int index=0; index<allocated; index++) | callback(pair->key, pair->value, info); |
| for(Pair *pair=*ref++; pair; pair=pair->link) | |
| callback(pair->key, pair->value, info); | |
| } | } |
| /// iterate over all pairs until condition becomes true, return that element | /// iterate over all pairs until condition becomes true, return that element |
| template<typename I> V first_that(bool callback(K, V, I), I info) const { | template<typename I> V first_that(bool callback(K, V, I), I info) const { |
| Pair **ref=refs; | HASH_FOR_EACH |
| for(int index=0; index<allocated; index++) | if(callback(pair->key, pair->value, info)) |
| for(Pair *pair=*ref++; pair; pair=pair->link) | return pair->value; |
| if(callback(pair->key, pair->value, info)) | |
| return pair->value; | |
| return V(0); | return V(0); |
| } | } |
| Line 368 public: | Line 325 public: |
| void clear() { | void clear() { |
| memset(refs, 0, sizeof(*refs)*allocated); | memset(refs, 0, sizeof(*refs)*allocated); |
| fpairs_count=fused_refs=0; | fpairs_count=fused_refs=0; |
| #ifdef HASH_ORDER | |
| first=0; | |
| last=&first; | |
| #endif | |
| } | } |
| private: | protected: |
| /// expand when these %% of allocated exausted | /// expand when these %% of allocated exausted |
| enum { | enum { |
| Line 399 private: | Line 360 private: |
| K key; | K key; |
| V value; | V value; |
| Pair *link; | Pair *link; |
| #ifdef HASH_ORDER | |
| Pair(uint acode, K akey, V avalue, Pair *alink) : | Pair **prev; |
| code(acode), | Pair *next; |
| key(akey), | |
| value(avalue), | Pair(uint acode, K akey, V avalue, Pair *alink, Pair **aprev) : code(acode), key(akey), value(avalue), link(alink), |
| link(alink) {} | prev(aprev), next(0) { *aprev=this; } |
| #else | |
| Pair(uint acode, K akey, V avalue, Pair *alink) : code(acode), key(akey), value(avalue), link(alink) {} | |
| #endif | |
| } **refs; | } **refs; |
| #ifdef HASH_ORDER | |
| Pair *first; | |
| Pair **last; | |
| #endif | |
| /// filled to threshold: needs expanding | /// filled to threshold: needs expanding |
| bool is_full() { return fused_refs==threshold; } | bool is_full() { return fused_refs==threshold; } |
| Line 440 private: | Line 409 private: |
| private: //disabled | private: //disabled |
| Hash& operator = (const Hash&) { return *this; } | HASH& operator = (const HASH&) { return *this; } |
| }; | }; |
| /// useful generic hash function | /** |
| inline void generic_hash_code(uint& result, char c) { | Simple String::body hash. |
| result=(result<<4)+c; | Allows hash code caching |
| if(uint g=(result&0xF0000000)) { | */ |
| result=result^(g>>24); | |
| result=result^g; | #ifdef HASH_CODE_CACHING |
| template<typename V> class HASH_STRING: public HASH<const CORD,V> { | |
| public: | |
| typedef typename HASH<const CORD,V>::Pair Pair; | |
| typedef const String::Body &K; | |
| typedef K key_type; | |
| /// put a [value] under the [key] @returns existed or not | |
| bool put(K str, V value) { | |
| if(!value) { | |
| remove(str); | |
| return false; | |
| } | |
| if(this->is_full()) | |
| this->expand(); | |
| CORD key=str.get_cord(); | |
| uint code=str.get_hash_code(); | |
| uint index=code%this->allocated; | |
| Pair **ref=&this->refs[index]; | |
| for(Pair *pair=*ref; pair; pair=pair->link) | |
| if(pair->code==code && CORD_cmp(pair->key,key)==0) { | |
| // found a pair with the same key | |
| pair->value=value; | |
| return true; | |
| } | |
| // proper pair not found -- create&link_in new pair | |
| if(!*ref) // root cell were fused_refs? | |
| this->fused_refs++; // not, we'll use it and record the fact | |
| HASH_NEW_PAIR(code, key, value); | |
| this->fpairs_count++; | |
| return false; | |
| } | } |
| } | |
| /// useful generic hash function | /// remove the [key] @returns existed or not |
| inline void generic_hash_code(uint& result, const char* s) { | bool remove(K str) { |
| while(char c=*s++) { | CORD key=str.get_cord(); |
| result=(result<<4)+c; | uint code=str.get_hash_code(); |
| if(uint g=(result&0xF0000000)) { | uint index=code%this->allocated; |
| result=result^(g>>24); | for(Pair **ref=&this->refs[index]; *ref; ref=&(*ref)->link){ |
| result=result^g; | Pair *pair=*ref; |
| if(pair->code==code && CORD_cmp(pair->key,key)==0) { | |
| // found a pair with the same key | |
| Pair *next=pair->link; | |
| #ifdef HASH_ORDER | |
| *(pair->prev)=pair->next; | |
| if(pair->next) | |
| pair->next->prev=pair->prev; | |
| else | |
| this->last=pair->prev; | |
| #endif | |
| delete pair; | |
| *ref=next; | |
| --this->fpairs_count; | |
| return true; | |
| } | |
| } | } |
| return false; | |
| } | } |
| } | |
| /// useful generic hash function | /// return true if key exists |
| inline void generic_hash_code(uint& result, const char* buf, size_t size) { | bool contains(K str){ |
| const char* end=buf+size; | CORD key=str.get_cord(); |
| while(buf<end) { | uint code=str.get_hash_code(); |
| result=(result<<4)+*buf++; | uint index=code%this->allocated; |
| if(uint g=(result&0xF0000000)) { | for(Pair *pair=this->refs[index]; pair; pair=pair->link){ |
| result=result^(g>>24); | if(pair->code==code && CORD_cmp(pair->key,key)==0) |
| result=result^g; | return true; |
| } | } |
| return false; | |
| } | } |
| } | |
| /// simple hash code of int. used by EXIF mapping | /// get associated [value] by the [key] |
| inline uint hash_code(int self) { | V get(K str) const { |
| uint result=0; | CORD key=str.get_cord(); |
| generic_hash_code(result, (const char*)&self, sizeof(self)); | uint code=str.get_hash_code(); |
| return result; | uint index=code%this->allocated; |
| } | for(Pair *pair=this->refs[index]; pair; pair=pair->link) |
| if(pair->code==code && CORD_cmp(pair->key,key)==0) | |
| return pair->value; | |
| return V(0); | |
| } | |
| /// put a [value] under the [key] if that [key] existed @returns existed or not | |
| bool put_replaced(K str, V value) { | |
| if(!value) { | |
| remove(str); | |
| return false; | |
| } | |
| CORD key=str.get_cord(); | |
| uint code=str.get_hash_code(); | |
| uint index=code%this->allocated; | |
| for(Pair *pair=this->refs[index]; pair; pair=pair->link) | |
| if(pair->code==code && CORD_cmp(pair->key,key)==0) { | |
| // found a pair with the same key, replacing | |
| pair->value=value; | |
| return true; | |
| } | |
| // proper pair not found | |
| return false; | |
| } | |
| /// put a [value] under the [key] if that [key] NOT existed @returns existed or not | |
| bool put_dont_replace(K str, V value) { | |
| if(!value) { | |
| remove(str); | |
| return false; | |
| } | |
| if(this->is_full()) | |
| this->expand(); | |
| CORD key=str.get_cord(); | |
| uint code=str.get_hash_code(); | |
| uint index=code%this->allocated; | |
| Pair **ref=&this->refs[index]; | |
| for(Pair *pair=*ref; pair; pair=pair->link) | |
| if(pair->code==code && CORD_cmp(pair->key,key)==0) { | |
| // found a pair with the same key, NOT replacing | |
| return true; | |
| } | |
| // proper pair not found -- create&link_in new pair | |
| if(!*ref) // root cell were fused_refs? | |
| this->fused_refs++; // not, we'll use it and record the fact | |
| HASH_NEW_PAIR(code, key, value); | |
| this->fpairs_count++; | |
| return false; | |
| } | |
| /// put all 'src' values if NO with same key existed | |
| void merge_dont_replace(const HASH_STRING& src) { | |
| #ifdef HASH_ORDER | |
| for(Pair *pair=src.first; pair; pair=pair->next) | |
| #else | |
| for(int i=0; i<src.allocated; i++) | |
| for(Pair *pair=src.refs[i]; pair; pair=pair->link) | |
| #endif | |
| put_dont_replace(String::Body(pair->key, pair->code), pair->value); | |
| } | |
| /// iterate over all pairs | |
| template<typename I> void for_each(void callback(K, V, I), I info) const { | |
| HASH_FOR_EACH | |
| callback(String::Body(pair->key, pair->code), pair->value, info); | |
| } | |
| /// Auto-object used to temporarily substituting/removing hash values | /// iterate over all pairs |
| template<typename I> void for_each_ref(void callback(K, V&, I), I info) const { | |
| HASH_FOR_EACH | |
| callback(String::Body(pair->key, pair->code), pair->value, info); | |
| } | |
| /// iterate over all pairs until condition becomes true, return that element | |
| template<typename I> V first_that(bool callback(K, V, I), I info) const { | |
| HASH_FOR_EACH | |
| if(callback(String::Body(pair->key, pair->code), pair->value, info)) | |
| return pair->value; | |
| return V(0); | |
| } | |
| /// simple hash iterator | |
| class Iterator { | |
| const HASH_STRING<V>& fhash; | |
| Pair *fcurrent; | |
| public: | |
| Iterator(const HASH_STRING<V>& ahash): fhash(ahash) { | |
| fcurrent=fhash.first; | |
| } | |
| operator bool () { | |
| return fcurrent != 0; | |
| } | |
| void next() { | |
| fcurrent=fcurrent->next; | |
| } | |
| String::Body key(){ | |
| return String::Body(fcurrent->key, fcurrent->code); | |
| } | |
| V value(){ | |
| return fcurrent->value; | |
| } | |
| }; | |
| }; | |
| #else //HASH_CODE_CACHING | |
| template<typename V> class HASH_STRING: public HASH<const String::Body,V>{}; | |
| #endif //HASH_CODE_CACHING | |
| #ifndef HASH_ORDER | |
| /// Auto-object used to temporarily substituting/removing string hash values | |
| template <typename K, typename V> | template <typename K, typename V> |
| class Temp_hash_value { | class Temp_hash_value { |
| Hash<K, V>& fhash; | HashString<V> &fhash; |
| K fname; | K fname; |
| V saved_value; | V saved_value; |
| public: | public: |
| Temp_hash_value(Hash<K, V>& ahash, K aname, V avalue) : | Temp_hash_value(HashString<V>& ahash, K aname, V avalue) : |
| fhash(ahash), | fhash(ahash), |
| fname(aname), | fname(aname), |
| saved_value(ahash.get(aname)) { | saved_value(ahash.get(aname)) { |
| Line 498 public: | Line 637 public: |
| fhash.put(fname, saved_value); | fhash.put(fname, saved_value); |
| } | } |
| }; | }; |
| #endif | #endif |
| #endif //PA_HASH_CLASS |