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mymap32.cpp
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394 lines (342 loc) · 8.79 KB
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#include "mymap32.h"
/*! member function of MyMap32 */
MyMap32::MyMap32()
{
num = 0;
hash_table = 0;
hash_size = 0;
max_size = 0;
pow2 = 0;
mem = 0;
memset( obj_name, 0, MAX_OBJ_NAME );
INIT_LIST_HEAD( &free_list );
INIT_LIST_HEAD( &link );
}
void MyMap32::clean()
{
while(!list_empty(&link)) {
list_head* pos = link.next;
list_del(pos);
Node* node = list_entry(pos, Node, link);
list_del(&node->hash);
list_del(&node->link);
int index = (node - mem) / sizeof(Node);
if(index >= 0 && index < max_size) {
list_add( &(node->link), &free_list );
} else {
delete node;
}
}
int i;
for(i = 0; i < hash_size; ++i) {
INIT_LIST_HEAD(&(hash_table[i]));
}
num = 0;
INIT_LIST_HEAD(&link);
}
MyMap32::~MyMap32()
{
clean();
if( hash_table ) {
delete []hash_table;
hash_table = NULL;
}
if( mem ) {
delete []mem;
mem = NULL;
}
}
void MyMap32::init( int _hash_size, int _max_size, const char* _obj_name )
{
INIT_LIST_HEAD( &link );
int i = 0;
for( i = 1; i < 32; ++i ) {
if( _hash_size <= ( 1 << i ) ) break;
}
num = 0;
pow2 = i;
hash_size = ( 1 << i );
hash_table = new list_head[ hash_size ];
for(i = 0; i < hash_size; ++i ) {
INIT_LIST_HEAD( &hash_table[i] );
}
mem = new Node[ _max_size ];
INIT_LIST_HEAD( &free_list );
for(i = 0; i < _max_size; ++i){
list_add_tail(&mem[i].link, &free_list);
}
max_size = _max_size;
strncpy( obj_name, _obj_name, MAX_OBJ_NAME );
}
bool MyMap32::find( intptr_t key, intptr_t& val )
{
int index = key & (hash_size-1);
list_head* pos;
list_for_each_safe( pos, &(hash_table[index]) ) {
Node* node = list_entry( pos, Node, hash );
if( node->key == key ) {
val = node->val;
return true;
}
}
return false;
}
bool MyMap32::set( intptr_t key, intptr_t val )
{
Node* node = 0;
list_head* pos;
int index = key & (hash_size-1);
list_for_each( pos, &(hash_table[index]) ) {
node = list_entry( pos, Node, hash );
if( node->key == key ) {
node->val = val;
return false;
}
}
if( list_empty(&free_list) ) {
node = new Node;
} else {
pos = free_list.next;
list_del(pos);
node = list_entry( pos, Node, link );
}
if( node ) {
node->key = key;
node->val = val;
list_add( &(node->hash), &(hash_table[index]) );
list_add( &(node->link), &link );
num++;
}
return true;
}
bool MyMap32::del( intptr_t key )
{
int index = key & (hash_size-1);
list_head* pos;
list_for_each_safe( pos, &(hash_table[index]) ) {
Node* node = list_entry( pos, Node, hash );
if( node->key == key ) {
list_del( &(node->hash) );
list_del( &(node->link) );
int index = (node - mem) / sizeof(Node);
if(index >= 0 && index < max_size) {
list_add( &(node->link), &free_list );
} else {
delete node;
}
num--;
return true;
}
}
return false;
}
Node* MyMap32::first()
{
if( !list_empty( &link ) ) {
Node* node = list_entry( link.next, Node, link );
return node;
}
return 0;
}
Node* MyMap32::next( Node* pre )
{
list_head* pos = pre->link.next;
if( pos != &link ) {
Node* node = list_entry( pos, Node, link );
return node;
}
return 0;
}
bool MyMap32::isempty()
{
return list_empty( &link );
}
int MyMap32::count()
{
return num;
}
static int str2id( const char* str, int len, int hash_size )
{
if( len < 1 ) return 0;
int hash = 5381;
int c;
while ((c = *str++) && len--) {
hash = ((hash << 5) + hash) + c;
}
return (hash & (hash_size -1) );
}
void MyMapStr::init( int _hash_size, int _max_size, const char* _obj_name )
{
INIT_LIST_HEAD( &link );
int i = 0;
for( i = 1; i < 32; ++i ) {
if( _hash_size <= ( 1 << i ) ) break;
}
num = 0;
pow2 = i;
hash_size = ( 1 << i );
hash_table = new list_head[ hash_size ];
for(i = 0; i < hash_size; ++i ) {
INIT_LIST_HEAD( &hash_table[i] );
}
mem = new StrNode[ _max_size ];
INIT_LIST_HEAD( &free_list );
for(i = 0; i < _max_size; ++i){
list_add_tail(&mem[i].link, &free_list);
}
max_size = _max_size;
strncpy( obj_name, _obj_name, MAX_OBJ_NAME );
}
bool MyMapStr::find( const char* key, intptr_t& val )
{
int len = strlen( key );
if( len < 1 ) return false;
int index = str2id( key, len, hash_size );
list_head* pos;
list_for_each_safe( pos, &(hash_table[index]) ) {
StrNode* node = list_entry( pos, StrNode, hash );
if( node->len == len ) {
if( strncmp( node->key, key, len ) == 0 ) {
val = node->val;
return true;
}
}
}
return false;
}
bool MyMapStr::set( const char* key, intptr_t val )
{
StrNode* node = 0;
int len = strlen( key );
if( len < 1 ) return false;
int index = str2id( key, len, hash_size );
list_head* pos;
list_for_each_safe( pos, &(hash_table[index]) ) {
StrNode* node = list_entry( pos, StrNode, hash );
if( node->len == len ) {
if( strncmp( node->key, key, len ) == 0 ) {
node->val = val;
return true;
}
}
}
if( list_empty(&free_list) ) {
node = new StrNode;
} else {
pos = free_list.next;
list_del(pos);
node = list_entry( pos, StrNode, link );
}
if( node ) {
node->key = (char*)malloc( len + 1 );
if( !node->key )
{
MY_ERROR( "[MyMapStr](set)malloc error, key: %s", key );
}
strncpy( node->key, key, len );
node->key[len] = '\0';
node->val = val;
node->len = len;
list_add( &(node->hash), &(hash_table[index]) );
list_add( &(node->link), &link );
num++;
}
return true;
}
bool MyMapStr::del( const char* key )
{
int len = strlen( key );
if( len < 1 ) return false;
int index = str2id( key, len, hash_size );
list_head* pos;
list_for_each_safe( pos, &(hash_table[index]) ) {
StrNode* node = list_entry( pos, StrNode, hash );
if( node->len == len ) {
if( strncmp( node->key, key, len ) == 0 ) {
list_del( &(node->hash) );
list_del( &(node->link) );
free( node->key );
int index = (node - mem) / sizeof(Node);
if(index >= 0 && index < max_size) {
list_add( &(node->link), &free_list );
} else {
delete node;
}
num--;
return true;
}
}
}
return false;
}
void MyMapStr::clean()
{
while(!list_empty(&link)) {
list_head* pos = link.next;
list_del(pos);
StrNode* node = list_entry(pos, StrNode, link);
list_del(&node->hash);
list_del(&node->link);
free( node->key );
int index = (node - mem) / sizeof(Node);
if(index >= 0 && index < max_size) {
list_add( &(node->link), &free_list );
} else {
delete node;
}
}
int i;
for(i = 0; i < hash_size; ++i) {
INIT_LIST_HEAD(&(hash_table[i]));
}
num = 0;
INIT_LIST_HEAD(&link);
}
MyMapStr::~MyMapStr()
{
clean();
if( hash_table ) {
delete []hash_table;
hash_table = NULL;
}
if( mem ) {
delete []mem;
mem = NULL;
}
}
StrNode* MyMapStr::first()
{
if( !list_empty( &link ) ) {
StrNode* node = list_entry( link.next, StrNode, link );
return node;
}
return 0;
}
StrNode* MyMapStr::next( StrNode* pre )
{
list_head* pos = pre->link.next;
if( pos != &link ) {
StrNode* node = list_entry( pos, StrNode, link );
return node;
}
return 0;
}
bool MyMapStr::isempty()
{
return list_empty( &link );
}
int MyMapStr::count()
{
return num;
}
MyMapStr::MyMapStr()
{
num = 0;
hash_table = 0;
hash_size = 0;
max_size = 0;
pow2 = 0;
mem = 0;
INIT_LIST_HEAD( &free_list );
INIT_LIST_HEAD( &link );
}