широко – -Translation – Keybot Dictionary

  Вы все еще кипятите и с...  

Show textShow cached sourceOpen source URL	Давным-давно в далекой-далекой галактике широко использовалась библиотека MFC, в которой у ряда классов были методы, сравнивающие this с нулем. Примерно так:
Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain	A long time ago, in a galaxy far, far away there was a widely used MFC library which had a few classes with methods that compared "this" pointer to null. It looked something like this:

  Почему разработчики ПО ...  

Show textShow cached sourceOpen source URL	В этой статье мы исследовали, почему разработчики не широко используют статический анализ, и то, как существующие инструменты могут быть улучшены, чтобы расширить их использование. Мы провели исследование с участием 20 разработчиков ПО, которые в среднем имеют 10-летний опыт работы со статическим анализатором ошибок.
Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain	In this paper, we investigated why developers do not widely use static analysis and how current tools could be improved to increase usage. We conducted a user study involving 20 software developers who have an average of about 10 years of experience with using static analysis tools to find bugs. We also discussed the implications of our results.

  Перезаписывать память -...  

Show textShow cached sourceOpen source URL	В другой, совершенно никак не связанной с предыдущей, функции, наш экземпляр программы запрашивает у другого экземпляра файл с некоторым именем. Для этого используется RPC - древняя как динозавры технология, присутствующая на многих платформах и широко используемая Windows для реализации межпроцессного и межмашинного взаимодействия.
Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain	In another function that is completely unrelated to the previous one, our application's instance asks another instance for a file with a specified name. This is done using RPC - a dinosaur-age technology present in many platforms and widely used by Windows for interprocess and intercomputer communication.

  Ctrl+S и Visual Studio ...  

Show textShow cached sourceOpen source URL

После пары часов копания в настройках Visual Studio, попыток отключить сохранение логов сборки в html файлы, совсем отключить это окно вывода, найти связь выводимого теста с системными временными файлами (ничто из этого не смогло повторить баг, напротив, наш код работал безошибочно), совершенно случайно была открыта, наверное, не самая широко известная возможность Output Window — сохранение всего выведенного текста в файл по нажатию Ctrl+S.

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

Summing up all of aforesaid, it becomes clear that to replicate this error we have to determine the relationship between Output Window and some external file, if any. After several hours of digging in Visual Studio settings while trying to disable the saving of build logs to html, disable this output window altogether or to find the connection between output text and system temp files (not a thing from this list was able to replicate this bug, on the contrary our code operated flawlessly), by accident one of not so well known Output Window features had been discovered: the ability to save outputted text into the file with Ctrl+S. It should be noted however that this action is in not synchronizing the output with this file, but simply stores the entire output into it without updating it afterwards. Neither the less by exactly this action we were able to replicate the exception of our interest.

  В ожидании Linux версии...  

Show textShow cached sourceOpen source URL

Inkscape - это кроссплатформенный свободный векторный графический редактор. Он широко используется любителями и профессионалами по всему миру для создания иллюстраций, иконок, логотипов, диаграмм, карт, а также веб-графики.

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

Inkscape is a cross-platform open-source vector graphics editor. It is widely used both by amateur and professional designers all over the world to create images, icons, logos, charts, maps, and web-graphics. Inkscape has become one of the most popular tools in this field. The project was founded in 2003 as a fork of Sodipodi project and is still developing. See the official website for more information about Inkscape.

  Оптимизация кода  

Show textShow cached sourceOpen source URL

Широко известно выражение по поводу ранних, довольно низкоуровневых (вроде борьбы за лишний оператор или переменную) оптимизаций, сформулированное Кнутом: "Преждевременная оптимизация — это корень всех бед".

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

In programming, almost everything should be treated from the viewpoint of rationality - optimization is no exception. There is a belief that code written by an inexperienced Assembler programmer is 3-5 times slower than code generated by the compiler (Zubkov). Widely known is a phrase by Knuth regarding early low-level optimizations (such as attempts to save on operators or variables): "Premature optimization is the root of all evil".

  Бесплатный CppCat для с...  

Show textShow cached sourceOpen source URL

Такое бывает нужно. Однако, анализатор смотрит более широко и обнаруживает ошибочный паттерн. Если результат такого целочисленного деления потом используется совместно с типом double, то это подозрительно.

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

This code is correct from the viewpoint of the language and compiler. It's just a regular situation where division of the integer number 16 by integer number 116 results in 0. Expressions like that are necessary sometimes. However, the analyzer takes a wider perspective of the code, and detects an error pattern: if the result of such an integer division is then used together with the double type, it may signal something is wrong.

  64 бита для Си++ програ...  

Show textShow cached sourceOpen source URL

Вот пример классического вечного цикла, если переменная bigValue превысит значение UINT_MAX. Компилятор даже с /Wp64 вынужден молчать, так как это широко распространенная операция сравнения двух переменных различной разрядности в битах.

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

Here is the example of a classical infinite loop if the value of the bigValue variable exceeds the value of UINT_MAX. Even with /Wp64 the compiler has to remain silent because it is a widely-spread operation of comparison of two variables, each of which has different digit capacity in bits. The code is completely correct when bigValue<=UINT_MAX. But when we are developing a 64-bit application we often mean processing of great amount of elements. In this case it is necessary to find and analyze such operations. That's exactly what Viva64 analyzer does. It marks all the comparison operations between 32-bit types and types which become 64-bit ones on a 64-bit platform.

  А пишут ли ещё на Си++?  

Show textShow cached sourceOpen source URL

Это естественное явление. Нет смысла рекламировать и писать о том, что и так известно и широко используется. В результате складывается впечатление, что язык давно заброшен и используется только для поддержания некоторых старых проектов.

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

Perhaps the reason is that the Internet is full of articles, forums, and news about new languages and their capabilities. Programmers who don't work with the C/C++ language, simply don't notice rare news items about it among all that stuff. It's quite natural: there's no point in advertising what has been widely known and used for a long time. As a result, they come to the conclusion that this language was abandoned long ago, and now is used only to maintain some old projects.

  Истории о новогодних ба...  

Show textShow cached sourceOpen source URL

Но версия о причинах возникновения ошибки все равно распространилась. Для отображения года используется стандарт ISO week date, он широко применяется в финансовых организациях для удобства формирования отчетного (финансового) года.

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

Apple preferred to keep silent again. However, rumors about the possible cause of the bug spread anyway. Apple uses the ISO week date standard, which is widely used by finance companies, as it enables convenient fiscal year planning. What is special about this standard is that a new year is considered as such only starting with the week the first Thursday of the year falls on. The ISO week date calendar contains 52 or 53 weeks (364 or 371 days), so it turned out iPhones were still living in the previous year and stepped into the new one (2013) on January 7, when the first week of the year began.

  Болезни программ: memset  

Show textShow cached sourceOpen source URL

В процессе анализа, встречается множество однотипных ложных срабатываний. Подозрительный код находится в нескольких макросах, широко используемых в различных частях проекта. В первый момент, кажется, что ничего кроме ложных срабатываний нет.

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

Note. While performing the analysis, there will be a lot of similar false reports. The odd code fragments are located in several macros widely used in various project parts. It seems at first that there are only false positives - scattered useful messages just get lost among them. However, you can easily fix it by adding just a few comments to suppress the warnings triggered by the macros. See the "Suppression of false alarms" section in the documentation to find out how to do that.

  Блог  

Show textShow cached sourceOpen source URL

Если раньше 64-битные процессоры были широко распространены, в основном, в сфере сложных и длительных вычислений - численного моделирования процессов гидро- и газодинамики, механики деформируемого твердого тела, экологии и молекулярной химии и т.д.

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

64-bit systems appeared more than 10 years ago, but we became closely acquainted with them comparatively recently when they came to the mass computer market. More and more software developers talk about the necessity of the support of such systems. Formerly 64-bit processors were mainly spread in the field of prolonged and complicated calculations - computational modeling of hydrodynamics and flow dynamics processes, deformable solid body mechanics, ecology and molecular chemistry ones, etc. They were also used for the maintenance of some ultra-large data bases. But today systems based on these processors can be observed as typical work stations. So, is it really necessary to port the applications to the 64-bit platforms? And if the decision of the porting is made, then by what means can it be done with the least time and financial costs? Let us see.

  Изменения в инфраструкт...  

Show textShow cached sourceOpen source URL

В связи с этим появились инструменты статического анализа кода, наиболее известным представителем которых является lint. Этот и аналогичные инструменты использовались достаточно широко в силу отсутствия альтернативных способов обнаружить ошибки на этапе кодирования.

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

C is a language that requires much accuracy and attention from the programmer because its own control over actions performed in the code is very weak. A more dangerous language is rather only assembler. Because of this, static code analysis tools appeared of which lint is the most famous representative. This tool and all the other similar ones have been used rather widely due to the absence of alternative means to detect errors at the stage of coding. They were relevant for the cycles of development of programs with any maturity level.

  Документируем ошибки в ...  

Show textShow cached sourceOpen source URL

В заключении хочется сказать, что анализатор прекрасно справился со своей работой и нашел много подозрительных мест, несмотря на то, что doxygen является популярным проектом и широко используется большим количеством как мелких, так и крупными компаниями.

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

To sum it up, I'd say the analyzer has done very well. Despite doxygen being a popular and widely used (by both small and large companies) tool, PVS-Studio still has managed to find lots of suspicious fragments in it. I have only discussed the most basic warnings and skipped such dull defects as excessive checks, unused variables, and the like. As I already said in the beginning, I was surprised by the, as I believe, quite careless code formatting in certain fragments.

  Поиск ловушек в Си/Си++...  

Show textShow cached sourceOpen source URL

Это вновь вызвано историей развития 64-битных систем. Именно модель данных LP64 на начальных этапах развития 64-битных систем получила наибольшую популярность и сейчас широко используется в Unix-мире.

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

With the help of this simple example you can check which data models can be understood by the static analyzer that you use. The problem is that most of them are meant for the LP64 data model only. Again it is due to the history of the 64-bit systems development. It is the LP64 data model that has gained the highest popularity at the first stages of the development of 64-bit systems and is now widely used in Unix-world. Long type in this data model has the size of 8 bytes and it means that this code is absolutely correct. However, 64-bit Windows systems use the LLP64 data model and in this model the size of the long type remains 4-byte and the given code is incorrect. In such cases the LONG_PTR or ptrdiff_t types are used in Windows.

  Знакомство с уровнями р...  

Show textShow cached sourceOpen source URL

Данный вид параллелизма широко используется при решении задач численного моделирования. Счетная область представлена в виде ячеек, описывающих состояние среды в соответствующих точках пространства - давление, плотность, процентное соотношение газов, температура и так далее.

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

This type of paralleling is widely used in solving problems of computational modeling. The countable domain is presented as cells, which describe the environment condition in the referring points of space: pressure, density, gases percentage ratio, temperature, etc. The number of such cells can be enormous, millions and billions. Each of these sells must be processed in the same way. Here data paralleling model is very appropriate itself, as it allows to load each core allocating a certain set of cells for it. The countable domain is divided into geometrical objects, e.g., parallelepipeds, and cells included in this domain are given for processing to a certain core. In mathematical physics, such type of parallelism is called geometrical parallelism.

  Введение в проблематику...  

Show textShow cached sourceOpen source URL

При решении широкого круга задач математической физики на многопроцессорных системах с помощью сеточных методов [10], широко используются два подхода для построения параллельных программ. Первый получил название метода геометрического параллелизма, второй - метод коллективного решения [11].

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

When solving various tasks of mathematical physics on multi-processor systems with the help of mesh methods [10] two approaches to building parallel programs are widely used. The first approach is called geometrical parallelism method, and the second one - group decision method [11]. Ideas on which these methods are based are simple and smart. It won't be exaggeration to say that most tasks of gas dynamics, microelectronics, ecology and many others, which are now solved by using the finite difference method or finite element method, are solved effectively by the geometrical parallelism method. The group decision method is reasonable to use when building parallel algorithms of solving tasks by Monte-Carlo methods, when a series of single-type calculations is performed and in some other cases.

  Количество строк кода (...  

Show textShow cached sourceOpen source URL

Существуют две широко используемые методики подсчета строк: подсчет количества "физических" строк и подсчет количества "логических" строк. Следует учесть, что эти термины не являются точно определенными, и нюансы их значений могут быть различны в конкретных случаях.

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

There are two major types of SLOC measures: physical SLOC and logical SLOC. Specific definitions of these terms vary depending on particular circumstances. The most common definition of physical SLOC is a count of lines in the text of the program's source code including comment lines and, sometimes, blank lines. Logical SLOC attempts to measure the number of executable expressions (such as operators, functions, etc.), but their specific definitions are tied to specific computer languages.

  64 бита для Си++ програ...  

Show textShow cached sourceOpen source URL

Многие широко распространенные конструкции языка Си++ потенциально опасны с точки зрения 64-бит, но компилятор не может выдавать на них предупреждения, так как в большинстве случаев они совершенно корректны.

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

The compiler key /Wp64 (Detect 64-Bit Portability Issues) is certainly a good feature for detection of errors related to the migration of application to the 64-bit system. It is able to point to many lines of code which may cause incorrect behavior. But there is an important detail behind all this. Many of the widely-spread C++ language constructions are potentially dangerous from the point of view of 64 bits, but the compiler is not able to display warning messages for them because in most cases they are absolutely correct. Further on, by means of the examples this aspect will be uncovered in detail. Viva64 analyzer carries out a more profound and detailed analysis, discovers potentially dangerous code and makes proper diagnostics. It is not an analogue or a substitute of a /Wp64. It is its expansion and supplement!

  64 бита, /Wp64, Visual ...  

Show textShow cached sourceOpen source URL	Это канонические, широко используемые конструкции. Чаще всего они безопасны. И разработчики компиляторов не внесут предупреждения на подобные конструкции, хотя при переходе на 64-битные системы они несут потенциальную опасность!
Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain	These are classical widely spread constructions. They are safe in most cases, and developers of compilers won't introduce warning messages on such constructions although they are potentially dangerous while porting on 64-bit systems! They should be analyzed at least once. Such errors are difficult to detect and they occur only in large data arrays or while processing a large number of items.

  Блог  

Show textShow cached sourceOpen source URL

Этот известный и широко используемый проект, по имеющему основания заявлению разработчиков, ставший фактически стандартом для документирования программного обеспечения, написанного на языке C++, еще не был проверен PVS-Studio.

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

In this article, we will speak about the static analysis of the doxygen documentation generator tool. This popular and widely used project, which, as its authors claim, not without reason, has become "the de facto standard tool for generating documentation from annotated C++ sources", has never been scanned by PVS-Studio before. Doxygen scans the program source code and generates the documentation relying on it. Now it's time for us to peep into its source files and see if PVS-Studio can find any interesting bugs there.

  Инструменты статическог...  

Show textShow cached sourceOpen source URL	Parasoft C/C++test. Широко известный и популярный анализатор кода. Ссылки: сайт, страница на сайте Wikipedia.
Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain	Parasoft C/C++test. A widely known and popular code analyzer. Related links: website, Wikipedia page.

  Технология OpenMP  

Show textShow cached sourceOpen source URL	POSIX-интерфейс для организации нитей (Pthreads) поддерживается широко (практически на всех UNIX-системах), однако по многим причинам не подходит для практического параллельного программирования:
Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain	POSIX-interface for threading (Pthreads) has a wide support (nearly on all UNIX-systems) but due to many reasons it does not suite the practical parallel programming:

  Самая короткая статья о...  

Show textShow cached sourceOpen source URL	Самое главное, что код проекта очень качественен и хорошо протестирован. Он широко используется и как следствие, если в нём и появляются ошибки, то они быстро обнаруживаются.
Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain	What's most important, the project code is very high-quality and well tested. It is widely used, so bugs are quickly revealed, should they ever occur.

  PVS-Studio наконец то д...  

Show textShow cached sourceOpen source URL	Так как библиотека широко используется, ошибки должны быстро обнаруживаться программистами. Ошибки могут оставаться только в редко используемых фрагментах кода или в экзотических подсистемах, у которых мало пользователей.
Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain	Since many programmers extensively use it, they also quickly catch bugs in it. Some remaining bugs can only be found in rarely used code fragments or exotic subsystems few users employ.

  По мотивам "трёх интерв...  

Show textShow cached sourceOpen source URL	Приятно было также услышать, что в Acronis широко применяется практика Code Review. Часто этот метод повышения качества программ недооценивается, или считается, что он отнимает слишком много времени. Скупой платит дважды.
Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain	It was also pleasant to know that Acronis extensively uses the Code Review technique. This method of software quality improvement is often underestimated or thought to be too time-consuming. But a cheapskate pays twice.

  Блог  

Show textShow cached sourceOpen source URL	Я добрался до кода широко известного клиента мгновенных сообщений Miranda IM. Вместе с различными плагинами это достаточно большой проект, размер которого составляет около 950 тысяч строк кода на C и C++.
Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain	I've arrived at the source code of a widely know instant messenger Miranda IM. Together with various plugins, this is a rather large project whose size is about 950 thousand code lines in C and C++. And like any other considerable project with a long development history, it has rather many errors and misprints.

  Не зная брода, не лезь ...  

Show textShow cached sourceOpen source URL	Подобный способ получения приватных данных следует обдумать более широко. При разработке программ, содержащих функции с переменным количеством аргументов подумайте, существуют ли ситуации, когда через них могут утечь данные во внешний мир.
Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain	You should give a wider consideration to this method of getting private data. When developing software containing variable-argument functions, think it over if there are cases when they may be the source of data leakage. It can be a log-file, a batch passed on the network and the like.

  Наши сотрудники посетил...  

Show textShow cached sourceOpen source URL

В ходе общения с разработчиками из игровой индустрии, наша компания вновь убедилась, что 64-битные технологии по прежнему малоинтересны при создании игр, устанавливающихся на машину пользователей. 64-битность уже широко используется на стороне сервера в массовых многопользовательских ролевых онлайн-игроах (MMORPG).

Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain

While communicating with developers from the game industry, we again get convinced that 64-bit technologies are still of little interest for those who develop games to be installed on a user computer. 64 bits are already being widely used on the server side in mass multiplayer online role play games (MMORPG). But developers do not plan to create 64-bit versions of their games until 99% of users have a 64-bit Windows version installed.

  Команда PVS-Studio расш...  

Show textShow cached sourceOpen source URL	С переходом от Си к Си++ и с ростом популярности стандартной библиотеки, в программах стали широко использовать классы строк, такие как std::string. Это понятно и объяснимо. Проще и безопасней работать с полноценной строкой, а не с указателем "char *".
Compare text pagesCompare HTM pagesOpen source URLOpen target URLDefine viva64.com as primary domain	Following the migration from C to C++ and the growth of the standard library's popularity, programmers started to widely use string classes such as std::string. There are sensible reasons behind it: handling a full-fledged string instead of a "char *" pointer is much easier and safer.