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Full Discussion: writing binary file (C++)
Top Forums Programming writing binary file (C++) Post 302529745 by lamachejo on Friday 10th of June 2011 09:52:57 AM
Old 06-10-2011
writing binary file (C++)
Hi guys, I am writing a vector into a binary file (linux of course), but somehow there seems to be something wrong with this code, because the output file size in binary is BIGGER than doing it with the same vector but insead of binary, in plain text, and I as far as I understand, binary files size it's lesser than saving it as a text.

Here's the code

Code:
	
int aux=0;
	    ofstream fo(file, ios::out | ios::binary);
	    fo.write("MP-PER-B \n",10*sizeof(char));
	    fo.write((const char*) (&numero),sizeof(int));
	    for(int i=0; i<numero; i++){
			aux=vector[i];
			fo.write ((const char *) (&aux),sizeof(int));
		}	
	  fo.close();

Also, being unable to read it from linux command line makes things difficult (I can't see if it wrote the numbers since I do not know any command that would read the file made ).
 

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LEARN ABOUT PHP

xdiff_string_bdiff_size

XDIFF_STRING_BDIFF_SIZE(3)						 1						XDIFF_STRING_BDIFF_SIZE(3)

xdiff_string_bdiff_size - Read a size of file created by applying a binary diff

SYNOPSIS

       int xdiff_string_bdiff_size (string  $patch)

DESCRIPTION

	Returns a size of a result file that would be created after applying binary $patch to the original file.

PARAMETERS

	      o $patch
		- The binary patch created by xdiff_string_bdiff(3) or xdiff_string_rabdiff(3) function.

RETURN VALUES

	Returns the size of file that would be created.

EXAMPLES

       Example #1

	      xdiff_string_bdiff_size(3) example

	       The following code applies reads a size of file that would be created after applying a binary diff.

	      <?php
	      $binary_patch = file_get_contents('file.bdiff');
	      $length = xdiff_string_bdiff_size($binary_patch);
	      echo "Resulting file will be $length bytes long";
	      ?>

SEE ALSO

       xdiff_string_bdiff(3), xdiff_string_rabdiff(3), xdiff_string_bpatch(3).

PHP Documentation Group 												XDIFF_STRING_BDIFF_SIZE(3)
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