Different applications require specific values to conform to structural paradigms. For example, Social Security numbers are always nine digits long.[Delphi] Component Creation Tutorial - TMetroButton
Some reports require that numbers be displayed with a fixed amount of characters. Sequence numbers, for example, usually start with 1 and increment without end, so they're displayed with leading zeroes to present a visual appeal. As a Delphi programmeryour approach to adding a number with leading zeroes depends on the specific use case for that value.
You can simply opt to pad a display value, or you can convert a number to a string for storage in a database. Use a straightforward function to change how your number displays. Use a padding function to append leading zeroes or any other character any time you need it within your script. To convert values that are already integers, use:. This approach works with Delphi 6 and later editions.
For example, if you set an integer value tocalling LeftPad:. Share Flipboard Email. Zarko Gajic. Computer Science Expert. Twitter Twitter. Updated January 11, To pad the number 7 with two leading zeroes, plug those values into the code:. If the value to be converted is already a string, use:.Need support for your remote team? Check out our new promo! IT issues often require a personalized solution. Why EE? Get Access. Log In. Web Dev. NET App Servers.
We help IT Professionals succeed at work. Convert a string already hex format to Hex for use with extracting files from a big file. Medium Priority. Last Modified: I have this problem. I have a string like this: E6B Filename I want to store the first bytes until " " as a hex string and then next set and extract that section and rename to its filename.
But i cannot convert the string to Hex. There are many that convert a normal string e. ABCD - convert to 41 42 43 Is this possible? Also please could you give me some pointers as to how to extract the file by accessing the hex through delphi. Thanks in advance. Start Free Trial. View Solutions Only. Top Expert This award recognizes someone who has achieved high tech and professional accomplishments as an expert in a specific topic. Commented: If it is hex already and You want to save it as hex, simply don't change it : But more serious, You must describe the problem once again in a more clear way.
Author Commented: This is for use with extracting files. I think "30" is the hex version of "00" in text, at least that's what happened when I tried It's really hard to explain, but I hope you can understand it. I am right in thinking that to access the hex of a file I have to convert the string to hex first right? If you don't already know You'll convert your start valueRecently, several people sent me bug reports where my EnigmaVB unpacker failed to extract files.
In all cases, the problem was caused by really large files, like 3. So, what's causing the problem? EnigmaVB unpacker is a 32bit application written in Delphi.
And Delphi streams are retarded. They look like they've been written in s and were never updated. TMemoryStream uses a continuous memory range, so it can never support anything larger than 2GB. TFileStream internally uses longint, so it doesn't properly support files larger than 2GB.
So, I have two choices. I can either make a custom stream class in Delphi, or I can pick another framework and rewrite my tool to use that. I'm not a programmer, I'm a reverser. I don't want to spend my time developing custom stream classes. I'd very much rather use this time breaking some code. So, say hello to. While researching all the Delphi limitations and possible workarounds, I ran into this great article by Scott Hanselman.
Reading both the post and the comments made me think a lot. Does using Google to solve your programming tasks makes you less of a programmer? I don't think so. In fact, I'm just lazy. Most people are. Why should I spend 30 minutes remembering basic algorithms for converting string to hex, if Google query can solve it in 10 seconds?
Why reinvent the wheel and write CRC calculation from scratch? I'll just open StackOverflow and have a solution that's already tried and tested. It doesn't mean I can't do those boring tasks - I just don't want to. Continuing the discussion about Delphi compiler and the object files. Please note, it is not a full-featured implementation of OMF specification. I only implemented all OMF file records that are processed by Delphi compiler. So, next time you have a cryptic compiler error while trying to link OMF file in Delphi, you can take a look into your OBJ file and make an educated guess what's causing the problem.
And it's a simple fix, too - you just need to use objconv. Something like this:. Finally, your OBJ file might contain some record type which is not supported by Delphi compiler at all.These variables can be manipulated like any integer variable.
If the file contains the hex numbers in some other format only hex numbers, like "5AD8", assembler formatlike "5AD8h", or 'C' format, like "0x5AD8", you can only read the lines in as strings first and then convert them to numbers. If there are more numbers on a line you also have to extract the separate numbers from the string first.
How to Add Leading Zeroes to a Number (Delphi Format)
I'm not going into details here. Then can use the Val procedure or perhaps StrToInt. More info is in the help file. LouThoms Delphi Developer. Sure it can! Numbers are numbers, it's just a question of how you display them.
To get the numbers as numbers instead of characters, read a numeric type byte, integer, word, whatever instead of a character or string type. Peter N Rot Delphi Developer. Thanks to all who replied both by email and through the newsgroup. I've now got it sorted. Thanks again. How to convert large hex numbers to decimal.
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Hex numbers. Re:Hex numbers. Dave Sherohm. Peter N Rot. Re:Hex numbers Thanks to all who replied both by email and through the newsgroup. Jacques Melanco. Other Threads 1. How to convert large hex numbers to decimal 2. Converting HEX number into Integer : help need 3.
Edit Mask for HEX numbers 4. Hex number to Gif procedure 5.Standard numeric format strings are used to format common numeric types. A standard numeric format string takes the form Axxwhere:. A is a single alphabetic character called the format specifier. Any numeric format string that contains more than one alphabetic character, including white space, is interpreted as a custom numeric format string.
For more information, see Custom Numeric Format Strings. The precision specifier ranges from 0 to 99 and affects the number of digits in the result. Note that the precision specifier controls the number of digits in the string representation of a number. It does not round the number itself. To perform a rounding operation, use the Math.
Flooror Math. Round method. When precision specifier controls the number of fractional digits in the result string, the result string reflects a number that is rounded to a representable result nearest to the infinitely precise result. If there are two equally near representable results:.
The precision specifier determines the number of digits in the result string. To pad a result string with leading or trailing spaces, use the composite formatting feature and define an alignment component in the format item. Some overloads of the ToString method of all numeric types. For example, you can supply a numeric format string to the Int ToString String and Int Format method, and the StringBuilder. AppendFormat method. The composite format feature allows you to include the string representation of multiple data items in a single string, to specify field width, and to align numbers in a field.
For more information, see Composite Formatting. Interpolated strings in C and Visual Basic, which provide a simplified syntax when compared to composite format strings.
Write a hex file in Delphi
You can download the Formatting Utilitya. NET Core Windows Forms application that lets you apply format strings to either numeric or date and time values and displays the result string. Source code is available for C and Visual Basic. The following table describes the standard numeric format specifiers and displays sample output produced by each format specifier.
See the Notes section for additional information about using standard numeric format strings, and the Example section for a comprehensive illustration of their use. The C examples in this article run in the Try.
NET inline code runner and playground. Select the Run button to run an example in an interactive window. Once you execute the code, you can modify it and run the modified code by selecting Run again. The modified code either runs in the interactive window or, if compilation fails, the interactive window displays all C compiler error messages.
A standard numeric format string can be used to define the formatting of a numeric value in one of two ways:. It can be passed to an overload of the ToString method that has a format parameter. The following example formats a numeric value as a currency string in the current culture in this case, the en-US culture. It can be supplied as the formatString argument in a format item used with such methods as String. FormatConsole. WriteLineand StringBuilder.The Format-Hex cmdlet displays a file or other input as hexadecimal values.
To determine the offset of a character from the output, add the number at the leftmost of the row to the number at the top of the column for that character.
The Format-Hex cmdlet can help you determine the file type of a corrupted file or a file that might not have a filename extension. You can run this cmdlet, and then read the hexadecimal output to get file information. When using Format-Hex on a file, the cmdlet ignores newline characters and returns the entire contents of a file in one string with the newline characters preserved.
The string Hello World is sent down the pipeline to the Format-Hex cmdlet. The hexadecimal output from Format-Hex shows the values of each character in the string. This example uses the hexadecimal output to determine the file type. The cmdlet displays the file's full path and the hexadecimal values. To test the following command, make a copy of an existing PDF file on your local computer and rename the copied file to File.
The Format-Hex cmdlet uses the Path parameter to specify a filename in the current directory, File. The file extension. This example uses an array of different data types to highlight how Format-Hex handles them in the Pipeline. It will pass each object through the Pipeline and process individually. However, if it's numeric data, and the adjacent object is also numeric, it will group them into a single output block. Specifies the encoding of the output.
This only applies to [string] input. The parameter has no effect on numeric types. Beginning with PowerShell 6. For more information, see the. NET documentation for Encoding. Used for pipeline input. Pipeline input supports only certain scalar types and [system. Prior to PowerShell 6.
Now, it handles each individual object as it passes through the Pipeline and won't group objects together unless like objects are adjacent. Specifies the complete path to a file. The value of LiteralPath is used exactly as it is typed. This parameter does not accept wildcard characters.
To specify multiple paths to files, separate the paths with a comma. If the LiteralPath parameter includes escape characters, enclose the path in single quotation marks. PowerShell does not interpret any characters in a single quoted string as escape sequences.When working with Byte Arrays sooner or later the question of visualization raises. Here it makes sense to output the individual bytes in hexadecimal form as a string. In this tip, I want to show you a function that does just that.
The function goes through the byte array byte by byte and converts each byte value into the corresponding hexadecimal value:. On the one hand, the function can be called only with a byte array or on the other hand optionally with a separator, which is written between the individual bytes for better readability. In this example, we first create a byte array that is 3 bytes long and then fill it with some values. Then we use our function to output these values.
In this context, it is also interesting how to load or save a byte array from respectively to a file. The author has not added a short description to his profile yet. Show Profile Message. Please note: The contributions published on askingbox. They are not verified by independents and do not necessarily reflect the opinion of askingbox.
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