C++ String::substr方法代码示例

bool Facebook::extractConnectionTypeAndId(FacebookRequest *req, MAUtil::String &connectionType, MAUtil::String &id) const
{
	const MAUtil::String path = req->getPath();

	int found = path.findFirstOf('/');
	if(String::npos == found)
	{
		return false;
	}
	id = path.substr(0, found);
	connectionType = path.substr(found+1);

    return (connectionType.size()>0 && id.size()>0);
}

/**
 * Helper function that unescapes a string.
 */
static MAUtil::String UnescapeHelper(const MAUtil::String& str)
{
	// The decoded string.
	MAUtil::String result = "";

	for (int i = 0; i < str.length(); ++i)
	{
		// If the current character is the '%' escape char...
		if ('%' == (char) str[i])
		{
			// Get the char value of the two digit hex value.
			MAUtil::String hex = str.substr(i + 1, 2);
			long charValue = strtol(
				hex.c_str(),
				NULL,
				16);
			// Append to result.
			result += (char) charValue;

			// Skip over the hex chars.
			i += 2;
		}
		else
		{
			// Not encoded, just copy the character.
			result += str[i];
		}
	}

	return result;
}

/**
 * Parse the received XML, and search for title& snippet attributes.
 */
void MediaWiki::processSearchResults()
{
	/* for ex, try this request for "bear" in your browser:
	 *   http://en.wikipedia.org/w/api.php?action=query&format=xml&
	 *   list=search&srwhat=text&srsearch=bear
	 * the output looks like this:
	 * ...
	 * <search>
	 * <p ns="0" title="title1" snippet="text.." size="10283"
	 * wordcount="1324" timestamp="2011-04-12T14:25:24Z" />
	 * more paragraphs
	 * </search>
	 * ...
	 */

	// Search for each p paragraph, and get the title & snippet.
	MAUtil::String input = mBuffer;
	int openTag = input.find("<p ",0);

	while( openTag != -1 )
	{
		int closeTag = input.find("/>", openTag+1);
		if (closeTag != -1 && closeTag > openTag)
		{
			MAUtil::String  record = input.substr(
				openTag+2, closeTag - openTag +1);
			// A record, ex: <p ns="0" title="title1" snippet="text.."
			// size="10283" wordcount="1324" timestamp="2011-04-12T14:25:24Z" />
			// Add the title if it doesn't exist yet.
			MAUtil::String newRecord = getTitle(record);
			bool canAdd(true);
			for (int i=0; i < mWiki->titleResults.size(); i++)
			{
				if ( mWiki->titleResults[i] == newRecord )
				{
					canAdd = false;
				}
			}
			if (canAdd)
			{
				mWiki->titleResults.add(newRecord);
				mWiki->snippetResults.add(getSnippet(record));
			}
		}
		input.remove(0,closeTag);

		// Get the next tag.
		openTag = input.find("<p ",0);
	}
}

/*
 * PublishingListener overwrite
 * FacebookPublisher2 registers itself as a PublishingListener of the mFacebook object. This will call the
 * FacebookPublisher2::publishingResponseReceived, sending the response from server in the "newId" param. The newId is
 * the id of new created object.
 * @param newId - the id of the new object.
 * @param path - contains the id of the object on which the publish request was made and the request name.
 * 				  e.g: id/feed, id/likes
 * This function is called when a new object is created (Album, Like, Comment, StatusMessage ect).
 */
void FacebookPublisher2::publishingResponseReceived(const MAUtil::String  &data, const MAUtil::String &path)
{
	MAUtil::String id;
	int found = data.find(":",0);
	if(found != MAUtil::String::npos)
	{
		found = data.find("\"", found);
		int last = data.findLastOf('"');
		if( (found != MAUtil::String::npos) && (last != MAUtil::String::npos))
		{
			id = data.substr(found+1, last-found);
		}

	}
	mListener->publishingResponseReceived(id, path);
}

/**
 * Parse paragraph, and get the title attribute.
 * @param input The input paragraph.
 * @return The title.
 */
MAUtil::String MediaWiki::getTitle(MAUtil::String inputStr)
{
	MAUtil::String title = "";
	int start = inputStr.find("title=",0);
	if ( start != -1 ){
		int end = inputStr.find(" snippet=", start+1);
		if ( end != -1)
		{
			// Get rid of the quotes also
			// ( from beginning, and end): title="text.." snippet=etc
			title = inputStr.substr(start+7, end - start - 8);
		}
	}
	// Format the title to unicode.
	formatToUnicode(title);

	// Get rid of the span tags, and keep only the content: the searchTerm.
	trimSpanTags(title);

	return title;
}

/**
 * Parse paragraph, and get the snippet attribute.
 * @param input The input paragraph.
 * @return The snippet.
 */
MAUtil::String MediaWiki::getSnippet(MAUtil::String inputStr)
{
	MAUtil::String snippet = "";
	int start = inputStr.find("snippet=",0);
	if ( start != -1 ){
		int end = inputStr.find(" size=", start+1);
		if ( end != -1){
			// Get rid of the quotes also( from beginning, and end)
			snippet = inputStr.substr(start+9, end - start - 10 );
		}
	}
	// Format the snippet to unicode.
	formatToUnicode(snippet);

	// Get rid of the span tags, and keep only the content: the searchTerm.
	trimSpanTags(snippet);

	// Get rid of the bold tags from end, that enclose dots.
	trimBoldTags(snippet);

	return snippet;
}

	void string() {
		MAUtil::String str = "test";
		assert("String::==", str == "test");
		assert("String::!=", str != "fest");
		assert("String::<", !(str < "fest") && (MAUtil::String("fest") < str));
		assert("String::>", !(MAUtil::String("fest") > str) && (str > "fest"));
		assert("String::<=", str <= "test" && str <= "west");
		assert("String::>=", str >= "test" && str >= "fest");
		assert("String::+", (str + "ing") == "testing");
		str+="ing";
		assert("String::+=", str == "testing");
		assert("String::find()", str.find("ing") == 4 && str.find("1") == MAUtil::String::npos);
		str+=" string";
		assert("String::findLastOf()", str.findLastOf('g') == 13 && str.findLastOf('1') == MAUtil::String::npos);
		assert("String::findFirstOf()", str.findFirstOf('g') == 6 && str.findFirstOf('1') == MAUtil::String::npos);
		assert("String::findFirstNotOf()", str.findFirstNotOf('t') == 1 && str.findFirstNotOf('1') == 0);
		str.insert(7, " MAUtil::");
		assert("String::insert(string)", str == "testing MAUtil:: string");

		str.remove(16, 2);
		assert("String::remove()", str == "testing MAUtil::tring");

		str.insert(16, 'S');
		assert("String::insert(char)", str == "testing MAUtil::String");

		assert("String::substr()", str.substr(8, 6) == "MAUtil");

		assert("String::length()", str.length() == 22);

		str.reserve(32);
		assert("String::reserve()", str == "testing MAUtil::String" && str.length() == 22);
		assert("String::capacity()", str.capacity() == 32);

		str.clear();
		assert("String::clear()", str.length() == 0 && str == "");
	}

void SettingsScreen::loadSettings() {
	MAUtil::String filename = getLocalPath() + SETTINGS_FILE_NAME;

	MAHandle file = maFileOpen(filename.c_str(), MA_ACCESS_READ);
	if(file < 0) {
		printf("Error opening file %i\n", file);
		return;
	}

	// Check if the file exists.
	int res = maFileExists(file);
	MAASSERT(res >= 0);
	if(!res) {
		printf("File does not exist.\n");
		maFileClose(file);
		return;
	}

	// Get the file size.
	int size = maFileSize(file);
	printf("Size: %i\n", size);
	MAASSERT(size >= 0);

	// Read the file data.
	static char data[200];
	MAASSERT(size < (int)sizeof(data));
	res = maFileRead(file, data, size);
	MAASSERT(res == 0);

	// Close the file.
	printf("Closing...\n");
	res = maFileClose(file);
	MAASSERT(res == 0);

	printf("Done.\n");

	MAUtil::String contents = data;

	printf("Loaded settings string %s", contents.c_str());

	if (contents.findFirstOf(',', 0) <= 0)
		return;

	int commaPosition = contents.findFirstOf(',', 0);
	MAUtil::String appCode = contents.substr(0, commaPosition);
	mAppCodeBox->setText(appCode);
	printf("app code: %s", appCode.c_str());

	int prevCommaPosition = commaPosition + 1;
	commaPosition = contents.findFirstOf(',', prevCommaPosition);
	MAUtil::String appUniq = contents.substr(prevCommaPosition, commaPosition-prevCommaPosition);
	mAppUniqBox->setText(appUniq);
	printf("app uniq: %s", appUniq.c_str());

	prevCommaPosition = commaPosition + 1;
	commaPosition = contents.findFirstOf(',', prevCommaPosition);
	MAUtil::String appPwd = contents.substr(prevCommaPosition, contents.length() - prevCommaPosition);
	//mAppPwdBox->setText(appPwd);
	printf("app pwd: %s", appPwd.c_str());

	//helper = CBHelper(appCode, appUniq);
	//helper.setPassword(appPwd);
	this->mScreen->initalizeHelper(appCode, appUniq, appPwd);
}

	/**
	 * Parse the message. This finds the message name and
	 * creates a dictionary with the message parameters.
	 */
	void WebViewMessage::parse(MAHandle dataHandle)
	{
		// Set message name to empty string as default.
		mMessageName = "";

		// We must have data.
		if (NULL == dataHandle)
		{
			return;
		}

		// Get length of the data, it is not zero terminated.
		int dataSize = maGetDataSize(dataHandle);

		// Allocate buffer for string data.
		char* stringData = (char*) malloc(dataSize + 1);

		// Get the data.
		maReadData(dataHandle, stringData, 0, dataSize);

		// Zero terminate.
		stringData[dataSize] = 0;

		// Create String object with message.
		MAUtil::String messageString = stringData;

		// Find schema.
		int start = messageString.find("mosync://");
		if (0 != start)
		{
			return;
		}

		// Set start of message name.
		start = 9;

		// Find end of message name.
		int end = messageString.find("?", start);
		if (MAUtil::String::npos == end)
		{
			// No params, set message name to rest of string.
			mMessageName = messageString.substr(start);
			return;
		}

		// Set message name.
		mMessageName = messageString.substr(start, end - start);

		while (1)
		{
			// Find param name.
			start = end + 1;
			end = messageString.find("=", start);
			if (MAUtil::String::npos == end)
			{
				// No param name found, we are done.
				break;
			}

			// Set param name.
			MAUtil::String paramName = messageString.substr(start, end - start);
			MAUtil::String paramValue;

			// Find end of param value.
			start = end + 1;
			end = messageString.find("&", start);
			if (MAUtil::String::npos == end)
			{
				// Last param, set param value to rest of string.
				paramValue = messageString.substr(start);
			}
			else
			{
				paramValue = messageString.substr(start, end - start);
			}

			// Add param to table.
			mMessageParams.insert(unescape(paramName), unescape(paramValue));

			// If no more params we are done.
			if (MAUtil::String::npos == end)
			{
				break;
			}
		}

		// Free string data.
		free(stringData);
	}

	/**
	 * \brief This function is used for reading the settings from the settings file
	 */
	void SettingsManager::_readSettings()
	{
		char settingsFileContent[Model::BUFF_SIZE];
		MAUtil::String content;

		int fileSize = maFileSize(_settingsFile);

		maFileRead(_settingsFile, settingsFileContent, fileSize);

		content.append(settingsFileContent, strlen(settingsFileContent));

		int offset = 0;
		int position = content.find("|", offset);
		_coin = content.substr(offset, position); //read the coin

		offset = position + 1;
		position = content.find("|", offset);

		int day = MAUtil::stringToInteger(content.substr(offset, position - offset), 10); //read the reset day

		offset = position + 1;
		position = content.find("|", offset);

		MAUtil::String dateString = content.substr(offset, position - offset); //read the dateString

		offset = position + 1;
		position = content.find("|", offset);

		MAUtil::String binaryMask = content.substr(offset, position - offset); //read the binary mask
		offset = position + 1;
		_debtValue = MAUtil::stringToDouble(content.substr(offset, content.length() - offset));

		if(binaryMask ==  "100")
		{
			_showAll = true;
			_showMonthly = false;
			_showFromDate = false;
		}
		else if(binaryMask == "010")
		{
			_showAll = false;
			_showMonthly = true;
			_showFromDate = false;
		}
		else if(binaryMask == "001")
		{
			_showAll = false;
			_showMonthly = false;
			_showFromDate = true;
		}

		if(_showMonthly)
		{
			_date._day = day;

			struct tm * dateTime = new tm;
			split_time(maTime(), dateTime);

			_date._mounth = dateTime->tm_mon + 1;
			_date._year = dateTime->tm_year + 1900;

			delete dateTime;
		}
		else if(_showFromDate)
		{
			offset = 0;
			position = dateString.find("-", offset);

			_date._year = MAUtil::stringToInteger(dateString.substr(offset, position), 10);

			offset = position + 1;
			position = dateString.find("-", offset);

			_date._mounth = MAUtil::stringToInteger(dateString.substr(offset, position - offset), 10);

			offset = position + 1;
			_date._day = MAUtil::stringToInteger(dateString.substr(offset, dateString.length() - offset), 10);
		}
		else if(_showAll)
		{
			_date._day = 1;
			_date._mounth = 1;
			_date._year = 1601;
		}
	}