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revisit bloom filters.

This commit is contained in:
Christopher Jeffrey 2014-12-16 12:35:41 -08:00
parent 0f074777e7
commit 944169a484
1 changed files with 50 additions and 27 deletions
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77
src/bitcoindjs.cc
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@ -2495,9 +2495,10 @@ async_block_time_after(uv_work_t *req) {
delete req;
}
/home/chjj/work/node_modules/bitcore/lib/Bloom.js
/home/chjj/bitcoin/src/bloom.cpp
/home/chjj/bitcoin/src/bloom.h
#if 0
// ~/work/node_modules/bitcore/lib/Bloom.js
// ~/bitcoin/src/bloom.cpp
// ~/bitcoin/src/bloom.h
static const unsigned int MAX_BLOOM_FILTER_SIZE = 36000; // bytes
static const unsigned int MAX_HASH_FUNCS = 50;
@ -2513,13 +2514,20 @@ NAN_METHOD(BloomCreate) {
// if (SHUTTING_DOWN()) NanReturnValue(Undefined());
var LN2SQUARED = 0.4804530139182014246671025263266649717305529515945455;
var LN2 = 0.6931471805599453094172321214581765680755001343602552;
var bit_mask = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80];
if (args.Length() > 0) {
if (args.Length() < 1) {
return NanThrowError(
"Usage: bitcoindjs.bloomCreate()");
"Usage: bitcoindjs.bloomCreate(options)");
}
Local<Object> options = Local<Object>::Cast(args[0]);
Local<Array> data = NanNew<Array>();
Local<Number> nhash = NanNew<Number>(0);
if (options->Get(NanNew<String>("data"))->IsArray()) {
data = options->Get(NanNew<String>("data"));
}
if (options->Get(NanNew<String>("hashFuncs"))->IsNumber()) {
nhash = options->Get(NanNew<String>("hashFuncs"));
}
Local<Object> filter = NanNew<Object>();
@ -2531,8 +2539,8 @@ var bit_mask = [0x01, 0x02, 0x04, 0x08, 0x10, 0x20, 0x40, 0x80];
std::string strHex = HexStr(ssBlock.begin(), ssBlock.end());
filter->Set(NanNew<String>("hex"), NanNew<String>(strHex));
filter->Set(NanNew<String>("data"), NanNew<Array>());
filter->Set(NanNew<String>("hashFuncs"), NanNew<Number>(0));
filter->Set(NanNew<String>("data"), data);
filter->Set(NanNew<String>("hashFuncs"), nhash);
NanReturnValue(filter);
}
@ -2542,13 +2550,15 @@ NAN_METHOD(BloomHash) {
// if (SHUTTING_DOWN()) NanReturnValue(Undefined());
if (args.Length() > 1) {
if (args.Length() < 1) {
return NanThrowError(
"Usage: bitcoindjs.bloomHash(filter)");
}
Local<Object> filter = Local<Object>::Cast(args[0]);
CBloomFilter cfilter;
String::AsciiValue hex_string_(jstx->Get(NanNew<String>("hex"))->ToString());
String::AsciiValue hex_string_(filter->Get(NanNew<String>("hex"))->ToString());
std::string hex_string = *hex_string_;
CDataStream ssData(ParseHex(hex_string), SER_NETWORK, PROTOCOL_VERSION);
@ -2560,7 +2570,10 @@ NAN_METHOD(BloomHash) {
}
std::vector<unsigned char> vDataToHash;
unsigned int nHashNum = 0;
CDataStream ss(ParseHex(hex_string), SER_NETWORK, PROTOCOL_VERSION);
ss >> vDataToHash;
unsigned int nHashNum = filter->Get(NanNew<String>("hashFuncs"))->ToUint32();
cfilter.Hash(nHashNum, vDataToHash);
NanReturnValue(NanNew<String>(vDataToHash));
@ -2603,10 +2616,12 @@ NAN_METHOD(BloomInsert) {
ss << cfilter;
std::string strHex = HexStr(ss.begin(), ss.end());
if (cfilter.isFull) NanReturnValue(NanNew<Boolean>(false));
if (!cfilter.isEmpty) NanReturnValue(NanNew<Boolean>(true));
filter->Set(NanNew<String>("hex"), NanNew<String>(strHex));
NanReturnValue(NanNew<Boolean>(true));
if (cfilter.isFull) NanReturnValue(NanNew<Boolean>(false));
if (!cfilter.isEmpty) NanReturnValue(filter);
NanReturnValue(filter);
}
NAN_METHOD(BloomContains) {
@ -2614,13 +2629,19 @@ NAN_METHOD(BloomContains) {
// if (SHUTTING_DOWN()) NanReturnValue(Undefined());
if (args.Length() < 1) {
if (args.Length() < 2) {
return NanThrowError(
"Usage: bitcoindjs.bloomContains(vKey)");
"Usage: bitcoindjs.bloomContains(filter, hash)");
}
Local<Object> filter = Local<Object>::Cast(args[0]);
String::Utf8Value s_(args[1]->ToString());
std::string js_hash = std::string(*s_);
uint256 hash(js_hash);
CBloomFilter cfilter;
String::AsciiValue hex_string_(jstx->Get(NanNew<String>("hex"))->ToString());
String::AsciiValue hex_string_(filter->Get(NanNew<String>("hex"))->ToString());
std::string hex_string = *hex_string_;
CDataStream ssData(ParseHex(hex_string), SER_NETWORK, PROTOCOL_VERSION);
@ -2631,8 +2652,9 @@ NAN_METHOD(BloomContains) {
return;
}
vector<unsigned char> vKey;
bool contained = cfilter.contains(vKey);
//vector<unsigned char> vKey;
//bool contained = cfilter.contains(vKey);
bool contained = cfilter.contains(hash);
NanReturnValue(NanNew<Boolean>(contained));
}
@ -2642,13 +2664,15 @@ NAN_METHOD(BloomSize) {
// if (SHUTTING_DOWN()) NanReturnValue(Undefined());
if (args.Length() > 0) {
if (args.Length() < 1) {
return NanThrowError(
"Usage: bitcoindjs.bloomSize()");
"Usage: bitcoindjs.bloomSize(filter)");
}
Local<Object> filter = Local<Object>::Cast(args[0]);
CBloomFilter cfilter;
String::AsciiValue hex_string_(jstx->Get(NanNew<String>("hex"))->ToString());
String::AsciiValue hex_string_(filter->Get(NanNew<String>("hex"))->ToString());
std::string hex_string = *hex_string_;
CDataStream ssData(ParseHex(hex_string), SER_NETWORK, PROTOCOL_VERSION);
@ -2662,8 +2686,7 @@ NAN_METHOD(BloomSize) {
bool size_ok = cfilter.IsWithinSizeConstraints();
NanReturnValue(NanNew<Boolean>(size_ok));
}
#endif
/**
* GetLastFileIndex()