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Speedcrunch strings1/5/2024 You can just install it using your distributions regular method. And the more advanced features are there the few times you do need them.Īll the Linux distributions have SpeedCrunch in their repositories. It really isn't all the scientist-specific features that make SpeedCrunch such a nice calculator, it's simply very efficient to use for all purposes. It probably is a great calculator for those use-cases. SpeedCrunch advertises itself as a calculator for rocket scientists. How these are placed and configured is remembered when you close it so you get an identical layout the next time you open it. These items can be detached into their own separate utility windows. You are not limited to Pi and the Golden Ratio and a few more like you are in KDE's KCalc.įormulas, functions and constants are placed in an area on the right of the calculation terminal window. There's a vast amount of formulas and more than 150 built-in constants. It can be configured to only show the terminal window and it can be configured to show a keypad, constants, functions, variables and a formula book. It displays a "Current results" above the numbers you enter as you type and the final result's shown in the "terminal" together with the numbers or equation when you press the Enter key. SpeedCrunch has a terminal-like window where you can enter numbers right away. It's a great choice if you are looking for something to assign to that Calc(ulator) key found on many modern keyboards. The homepage describes it as a "high-precision scientific calculator" and while that's true it is also the by far best general-purpose calculator available on Linux platforms. Here’s the C implementation.SpeedCrunch is a very efficient and easy to use free calculator program for Linux, Windows and macOS. For example If I want to check the binary representation of a number I type bin(45). It’s multi-platform and fast but the features I liked most are the different functions you can enable from the View menu and the programmatic way of handling certain things. A good example to start with – the TFTP specification (RFC 1350). Today I came across another calculator SpeedCrunch. hexdump -C is also useful if you can get a dump of the data in a file byte by byte. How to see the encoded data in a protocol? Use Wireshark for network data. Endianness – Wikipedia has an excellent pictorial explanation here. String encoding formats and how to convert from one encoding to another? Take a look at the library functions section of the libiconv library. The receiver already knows the order in which the fields are encoded in the message.ġ. The receiver will receive the data and depending on the message type it will decode the remaining fields. Production date (0圎) – date (16122012) //keeping it simple in decimal numbersĪll that remains now is to copy the fields and values in a buffer one by one in the same order and send it out to the receiver. Item name (0xB) encoding format (0xA) length (0x13) – “Christmas Plum Cake” Message type (0xA) – item description (0x111) Let’s assign arbitrary yet unique values to our example keeping it simple and human readable: All the fields and values can then be appended one after another in a single buffer and you have the encoded message ready to be sent. ASCII, Unicode) and length after the field “item name”. So in our example, we can specify the string encoding format (eg. Strings can be in different encoding formats and can be of variable length. The RHS can be numeric or can be strings. The properties/fields in LHS are given a predefined numeric ID. Item name – Christmas plum cake //string (can be in different formats) Message type – item description //numeric value For example, if we want to specify a product in a bakery: The sender encodes the all the pieces of information in a predefined way into a single message chunk and transfers it to the receiver who understands the format, decodes it and acts as per the type of information received.Īt the lowest level (leaving aside data encryption, multiple layers), the main pieces of information in a single chunk consist of the type of message, the properties/fields of the message and their corresponding values. Suggestions for improvement are most welcome.Ī protocol is a predefined mutually understandable set of information exchanged between a sending and a receiving software process. I will try to summarize the procedure in the simplest way I can in layman’s terms. Though implementing a protocol seems to be a very pensive task at a first glance, it becomes relatively simpler if the developer is methodical in his approach.
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