binaryfiles

Well I just noticed that by changing the position -in microsoft visual studio- through "seekp" I implicitelly also change the read-position, when handling files. I am wondering however if this is "portable" behaviour? Can I expect the position of reading & writing to be always the same? And consequently: will tellp & tellg always return the same value? For file positions they are the same. In other words there is only one pointer maintained. From 27.9.1.1p3 : A joint file position is maintained for both the input sequence and the output sequence. So, seekg and seekp are interchangeable for

How can I know if a file is a binary file? For example, compiled c file. I want to read all files from some directory, but I want ignore binary files. Use utility file , sample usage: $ file /bin/bash /bin/bash: Mach-O universal binary with 2 architectures /bin/bash (for architecture x86_64): Mach-O 64-bit executable x86_64 /bin/bash (for architecture i386): Mach-O executable i386 $ file /etc/passwd /etc/passwd: ASCII English text $ file code.c code.c: ASCII c program text file manual page I use ! grep -qI . $path Only drawback I can see is that it will consider an empty file binary but then

I was searching for a way to check whether I've reached the end of a file for my binary reader and one suggestion was to use PeekChar as such while (inFile.PeekChar() > 0) { ... } However, it looks like I've run into an issue Unhandled Exception: System.ArgumentException: The output char buffer is too sma ll to contain the decoded characters, encoding 'Unicode (UTF-8)' fallback 'Syste m.Text.DecoderReplacementFallback'. Parameter name: chars at System.Text.Encoding.ThrowCharsOverflow() at System.Text.Encoding.ThrowCharsOverflow(DecoderNLS decoder, Boolean nothin gDecoded) at System.Text

I have a binary file. This file contains an UTF-8 string. Moreover, it is guaranteed that this string is just a single word. In python, how can I get number of letters in this string? Let's say, I opened this file and read bytes: bytes = open("1.dat", "rb").read() What next have I to do to find out length (in letters, not bytes) of UTF-8 string? unicode_string = bytes.decode("utf-8") print len(unicode_string) 来源： https://stackoverflow.com/questions/8056496/python-get-unicode-string-size

Say I have a binary file; it contains positive binary numbers, but written in little endian as 32-bit integers How do I read this file? I have this right now. int main() { FILE * fp; char buffer[4]; int num = 0; fp=fopen("file.txt","rb"); while ( fread(&buffer, 1, 4,fp) != 0) { // I think buffer should be 32 bit integer I read, // how can I let num equal to 32 bit little endian integer? } // Say I just want to get the sum of all these binary little endian integers, // is there an another way to make read and get sum faster since it's all // binary, shouldnt it be faster if i just add in binary

We are in evaluating technologies that we'll use to store data that we gather during the analysis of C/C++ code. In the case of C++, the amount of data can be relatively large, ~20Mb per TU. After reading the following SO answer it made me consider that HDF5 might be a suitable technology for us to use. I was wondering if people here could help me answer a few initial questions that I have: Performance. The general usage for the data will be write once and read "several" times, similar to the lifetime of a '.o' file generated by a compiler. How does HDF5 compare against using something like an

So I have a .aar file which has a file I need to remove from inside it. I am running on mac and changed the extention from .aar to .zip and unzipped the zip file. I then removed the file from the folder, recompressed it back into a .zip and then tried changing the extension from .zip back to .aar. The problem is that the now modified .aar is not recognized as a .aar file. It is still being registered as a .zip and I can no longer use it in my project. So my question is two fold: 1) How can one easily modify the contents of a .aar file and 2) How do you properly convert to/from .aar and .zip?

I have this binary file on my linux system .. udit@udit-Dabba ~ $ cat file.enc Salted__s�bO��<0�F���Jw!���]�:`C�LKȆ�l Using hexdump command I see its information like this .. udit@udit-Dabba ~ $ hexdump -C file.enc 00000000 53 61 6c 74 65 64 5f 5f 1b 73 a1 62 4f 15 be f6 |Salted__.s.bO...| 00000010 3c 30 cc 46 ee 10 13 11 84 bf 4a 77 21 a4 84 99 |<0.F......Jw!...| 00000020 0e 5d ef 11 18 3a 60 43 a0 4c 4b 1e c8 86 e6 6c |.]...:`C.LK....l| 00000030 Now I am given a file on some other system whose contents are like this .. 53 61 6c 74 65 64 5f 5f 1b 73 a1 62 4f 15 be f6 3c 30 cc 46 ee 10 13 11