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hash function: new support 255 bytes, old: 50 bytes

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git-svn-id: svn://kolibrios.org@7430 a494cfbc-eb01-0410-851d-a64ba20cac60
This commit is contained in:
pavelyakov 2018-10-03 08:57:58 +00:00
parent 2f3ccbc121
commit e1ae8286e5
1 changed files with 32 additions and 14 deletions
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46
programs/cmm/lib/array.h
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@ -7,18 +7,26 @@
{ {
dword memory; dword memory;
dword offsetMemory; dword offsetMemory;
dword lenInitSize;
dword recursiveIndex(dword i, address); dword recursiveIndex(dword i, address);
byte set(dword key, data); byte set(dword key, data);
dword get(dword key); dword get(dword key);
void reallocMemory(dword newSize);
//dword del(dword key); //dword del(dword key);
byte init(dword size); byte init(dword size);
}; };
:void Array::reallocMemory(dword newSize)
{
memory = realloc(memory, newSize);
lenInitSize = newSize;
}
:dword Array::recursiveIndex(dword key, address) :dword Array::recursiveIndex(dword key, address)
{ {
dword flags = 0; dword flags = 0;
flags = DSBYTE[address + 4];
IF (DSDWORD[address] == key) RETURN address; IF (DSDWORD[address] == key) RETURN address;
flags = DSBYTE[address + 4];
//IF (flags & 100b) RETURN address; // if delete //IF (flags & 100b) RETURN address; // if delete
IF (flags & 010b) && (DSDWORD[address] < key) RETURN recursiveIndex(key, DSDWORD[address + 5]); // left tree IF (flags & 010b) && (DSDWORD[address] < key) RETURN recursiveIndex(key, DSDWORD[address + 5]); // left tree
IF (flags & 001b) && (DSDWORD[address] > key) RETURN recursiveIndex(key, DSDWORD[address + 9]); // right tree IF (flags & 001b) && (DSDWORD[address] > key) RETURN recursiveIndex(key, DSDWORD[address + 9]); // right tree
@ -29,7 +37,8 @@
IF(!size) RETURN 0; IF(!size) RETURN 0;
IF(!memory) IF(!memory)
{ {
memory = malloc(size * 17); lenInitSize = size * 17;
memory = malloc(lenInitSize);
EBX = memory; EBX = memory;
DSDWORD[EBX] = 0; DSDWORD[EBX] = 0;
DSBYTE[EBX + 4] = 0; DSBYTE[EBX + 4] = 0;
@ -39,13 +48,18 @@
offsetMemory = 17; offsetMemory = 17;
RETURN 0xFF; RETURN 0xFF;
} }
memory = realloc(size * 17); IF(size > lenInitSize)
RETURN 0xFF; {
reallocMemory(size * 17);
RETURN 0xFF;
}
RETURN 0;
} }
:byte Array::set(dword key, data) :byte Array::set(dword key, data)
{ {
dword address = 0; dword address = 0;
dword newOffset = 0; dword newOffset = 0;
IF(offsetMemory > lenInitSize) reallocMemory(offsetMemory << 1);
address = recursiveIndex(key, memory); address = recursiveIndex(key, memory);
/*IF(DSBYTE[address + 4] & 100b) /*IF(DSBYTE[address + 4] & 100b)
{ {
@ -68,12 +82,12 @@
newOffset = memory + offsetMemory; newOffset = memory + offsetMemory;
IF(DSDWORD[address] < key) IF(DSDWORD[address] < key)
{ {
DSBYTE[address + 4] |= 10b; DSBYTE[address + 4] |= 010b; // set flag left address
DSDWORD[address + 5] = newOffset; DSDWORD[address + 5] = newOffset;
} }
ELSE IF(DSDWORD[address] > key) ELSE IF(DSDWORD[address] > key)
{ {
DSBYTE[address + 4] |= 01b; DSBYTE[address + 4] |= 001b; // set flag right address
DSDWORD[address + 9] = newOffset; DSDWORD[address + 9] = newOffset;
} }
ELSE ELSE
@ -114,20 +128,24 @@
byte init(dword size); byte init(dword size);
}; };
:dword Dictionary::hash(dword text) :dword Dictionary::hash(dword text) // max 255 bytes as strings => 4 byte or duble word hash
{ {
dword s1 = 1; dword checkSum1 = 1;
dword s2 = 0; dword checkSum2 = 0;
dword beginAddress = 0;
beginAddress = text;
WHILE(DSBYTE[text]) WHILE(DSBYTE[text])
{ {
s1 += DSBYTE[text]; checkSum1 += DSBYTE[text];
s2 += s1; checkSum2 += checkSum1;
text++; text++;
} }
IF(s1>0x3FFF) RETURN 0; //IF(h1 > 0x03FFF) RETURN h1 << 8 ^ h2;
IF(s2>0x3FFFF) RETURN 0; //IF(h2 > 0x3FFFF) RETURN h1 << 8 ^ h2;
RETURN s2<<14|s1; EAX = text - beginAddress;
EAX <<= 23;
RETURN EAX | checkSum2;
} }
:byte Dictionary::set(dword key, value) :byte Dictionary::set(dword key, value)