JSBool getElementsByTagName(JSContext * cx, JSObject * obj, uintN argc, jsval * argv, jsval * rval)
{
nsCOMPtr<nsIDOMNode> mNode = (nsIDOMNode*)JS_GetPrivate(cx, obj);
nsresult rv;
nsCOMPtr<nsIDOMElement> mElement = do_QueryInterface(mNode, &rv);
if(NS_FAILED(rv))
{
*rval = JSVAL_FALSE;
return JS_TRUE;
}
LPWSTR tagName;
JS_BeginRequest(cx);
if(!JS_ConvertArguments(cx, argc, argv, "W", &tagName))
{
JS_ReportError(cx, "error parsing arguments in getelements by tagname");
JS_EndRequest(cx);
return JS_FALSE;
}
nsDependentString aTagName(tagName);
nsIDOMNodeList * mNodeList;
mElement->GetElementsByTagName(aTagName, &mNodeList);
buildNodeList(mNodeList, cx, obj, rval);
mNodeList->Release();
JS_EndRequest(cx);
return JS_TRUE;
}
JSBool childGetter(JSContext * cx, JSObject * obj, jsval idval, jsval * vp)
{
JS_BeginRequest(cx);
nsCOMPtr<nsIDOMNode> mNode = (nsIDOMNode*)JS_GetPrivate(cx, obj);
JSString * idvalStr = JS_ValueToString(cx, idval);
jschar * idvalChars = JS_GetStringChars(idvalStr);
if(_wcsicmp(idvalChars, TEXT("childNodes")) == 0)
{
nsIDOMNodeList * nodeList;
mNode->GetChildNodes(&nodeList);
buildNodeList(nodeList, cx, obj, vp);
nodeList->Release();
}
else
*vp = JSVAL_NULL;
JS_EndRequest(cx);
return JS_TRUE;
}
void Compression::huffmanEncode(const char* inputFile)
{
FILE * src = fopen(inputFile, "rb");
char outputPath[1000];
const char * fileExtension = ".bin";
outputFilePath(inputFile, outputPath, fileExtension);
FILE * dest = fopen(outputPath, "wb");
if (src == NULL || dest == NULL)
{
printf("Не удается найти файл.");
exit(EXIT_FAILURE);
}
unsigned int fileSize;
fileSize = getFileSize(src);
unsigned int * freqList;
freqList = (unsigned int *)calloc(CHARS_LIMIT, sizeof(unsigned int));
calcCharFreq(src, freqList);
unsigned int numOfFreq;
numOfFreq = calcNumOfFreq(freqList);
HuffNode * nodeList = NULL;
buildNodeList(&nodeList, freqList);
buildHuffTree(&nodeList);
HuffNode * treeRoot = nodeList;
unsigned int i;
HuffCode newCode;
HuffCode * huffCodeTable;
huffCodeTable = (HuffCode *)calloc(CHARS_LIMIT, sizeof(HuffCode));
for(i=0; i<CHARS_LIMIT; i++)
{
if(freqList[i] > 0)
{
newCode.length = 0;
buildHuffCode(treeRoot, &newCode, i);
huffCodeTable[i] = newCode;
}
}
HuffHeader hHeader;
writeHeader(dest, hHeader, numOfFreq, fileSize);
HuffFreq hFreq;
writeFreq(dest, freqList, hFreq);
writeEncodedData(src, dest, huffCodeTable, fileSize);
freeHuffTree(treeRoot);
treeRoot = NULL;
free(huffCodeTable);
free(freqList);
fclose(src);
fclose(dest);
}