| // Copyright 2014 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "platform/v8_inspector/V8DebuggerScript.h" |
| |
| #include "platform/v8_inspector/V8StringUtil.h" |
| |
| namespace v8_inspector { |
| |
| static const char hexDigits[17] = "0123456789ABCDEF"; |
| |
| static void appendUnsignedAsHex(unsigned number, String16Builder* destination) |
| { |
| for (size_t i = 0; i < 8; ++i) { |
| UChar c = hexDigits[number & 0xF]; |
| destination->append(c); |
| number >>= 4; |
| } |
| } |
| |
| // Hash algorithm for substrings is described in "Über die Komplexität der Multiplikation in |
| // eingeschränkten Branchingprogrammmodellen" by Woelfe. |
| // http://opendatastructures.org/versions/edition-0.1d/ods-java/node33.html#SECTION00832000000000000000 |
| static String16 calculateHash(const String16& str) |
| { |
| static uint64_t prime[] = { 0x3FB75161, 0xAB1F4E4F, 0x82675BC5, 0xCD924D35, 0x81ABE279 }; |
| static uint64_t random[] = { 0x67452301, 0xEFCDAB89, 0x98BADCFE, 0x10325476, 0xC3D2E1F0 }; |
| static uint32_t randomOdd[] = { 0xB4663807, 0xCC322BF5, 0xD4F91BBD, 0xA7BEA11D, 0x8F462907 }; |
| |
| uint64_t hashes[] = { 0, 0, 0, 0, 0 }; |
| uint64_t zi[] = { 1, 1, 1, 1, 1 }; |
| |
| const size_t hashesSize = PROTOCOL_ARRAY_LENGTH(hashes); |
| |
| size_t current = 0; |
| const uint32_t* data = nullptr; |
| size_t sizeInBytes = sizeof(UChar) * str.length(); |
| data = reinterpret_cast<const uint32_t*>(str.characters16()); |
| for (size_t i = 0; i < sizeInBytes / 4; i += 4) { |
| uint32_t v = data[i]; |
| uint64_t xi = v * randomOdd[current] & 0x7FFFFFFF; |
| hashes[current] = (hashes[current] + zi[current] * xi) % prime[current]; |
| zi[current] = (zi[current] * random[current]) % prime[current]; |
| current = current == hashesSize - 1 ? 0 : current + 1; |
| } |
| if (sizeInBytes % 4) { |
| uint32_t v = 0; |
| for (size_t i = sizeInBytes - sizeInBytes % 4; i < sizeInBytes; ++i) { |
| v <<= 8; |
| v |= reinterpret_cast<const uint8_t*>(data)[i]; |
| } |
| uint64_t xi = v * randomOdd[current] & 0x7FFFFFFF; |
| hashes[current] = (hashes[current] + zi[current] * xi) % prime[current]; |
| zi[current] = (zi[current] * random[current]) % prime[current]; |
| current = current == hashesSize - 1 ? 0 : current + 1; |
| } |
| |
| for (size_t i = 0; i < hashesSize; ++i) |
| hashes[i] = (hashes[i] + zi[i] * (prime[i] - 1)) % prime[i]; |
| |
| String16Builder hash; |
| for (size_t i = 0; i < hashesSize; ++i) |
| appendUnsignedAsHex(hashes[i], &hash); |
| return hash.toString(); |
| } |
| |
| V8DebuggerScript::V8DebuggerScript(v8::Isolate* isolate, v8::Local<v8::Object> object, bool isLiveEdit) |
| { |
| v8::Local<v8::Value> idValue = object->Get(toV8StringInternalized(isolate, "id")); |
| DCHECK(!idValue.IsEmpty() && idValue->IsInt32()); |
| m_id = String16::fromInteger(idValue->Int32Value()); |
| |
| m_url = toProtocolStringWithTypeCheck(object->Get(toV8StringInternalized(isolate, "name"))); |
| m_sourceURL = toProtocolStringWithTypeCheck(object->Get(toV8StringInternalized(isolate, "sourceURL"))); |
| m_sourceMappingURL = toProtocolStringWithTypeCheck(object->Get(toV8StringInternalized(isolate, "sourceMappingURL"))); |
| m_startLine = object->Get(toV8StringInternalized(isolate, "startLine"))->ToInteger(isolate)->Value(); |
| m_startColumn = object->Get(toV8StringInternalized(isolate, "startColumn"))->ToInteger(isolate)->Value(); |
| m_endLine = object->Get(toV8StringInternalized(isolate, "endLine"))->ToInteger(isolate)->Value(); |
| m_endColumn = object->Get(toV8StringInternalized(isolate, "endColumn"))->ToInteger(isolate)->Value(); |
| m_executionContextAuxData = toProtocolStringWithTypeCheck(object->Get(toV8StringInternalized(isolate, "executionContextAuxData"))); |
| m_executionContextId = object->Get(toV8StringInternalized(isolate, "executionContextId"))->ToInteger(isolate)->Value(); |
| m_isLiveEdit = isLiveEdit; |
| |
| v8::Local<v8::Value> sourceValue = object->Get(toV8StringInternalized(isolate, "source")); |
| if (!sourceValue.IsEmpty() && sourceValue->IsString()) |
| setSource(isolate, sourceValue.As<v8::String>()); |
| } |
| |
| V8DebuggerScript::~V8DebuggerScript() |
| { |
| } |
| |
| const String16& V8DebuggerScript::sourceURL() const |
| { |
| return m_sourceURL.isEmpty() ? m_url : m_sourceURL; |
| } |
| |
| v8::Local<v8::String> V8DebuggerScript::source(v8::Isolate* isolate) const |
| { |
| return m_source.Get(isolate); |
| } |
| |
| void V8DebuggerScript::setSourceURL(const String16& sourceURL) |
| { |
| m_sourceURL = sourceURL; |
| } |
| |
| void V8DebuggerScript::setSourceMappingURL(const String16& sourceMappingURL) |
| { |
| m_sourceMappingURL = sourceMappingURL; |
| } |
| |
| void V8DebuggerScript::setSource(v8::Isolate* isolate, v8::Local<v8::String> source) |
| { |
| m_source.Reset(isolate, source); |
| m_hash = calculateHash(toProtocolString(source)); |
| } |
| |
| } // namespace v8_inspector |