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ComputingIoBinary

File Length

viewed 10399 times and licensed 172 times
Calculates the length of a binary file.
Controller: CodeCogs

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Interface

C++

FileLength

 
longfileLengthFILE*stream )
Returns the length of a file in bytes. Useful when you need to dynamically allocate memory to hold the contents of a file you intend to read. This function was designed to replicated the similarly named filelength function that comes with some distributions of C/C++, particularly on DOS platforms. There doesn't appear to be an equivalent in Unix.

Example 1

#include <stdio.h>
#include <codecogs/computing/io/binary/file_length.h>
 
using namespace Computing::IO::Binary;
 
int main ()
{
  FILE* stream = fopen("/codecogs/io/binary/file_length.h","rb");
  printf("\n File length=%d", fileLength(stream));
  fclose(stream);
 
  return 0;
}

Parameters

streamA pointer to the file stream

Returns

The length of the file in bytes. Return -1 if an error is encountered.

Authors

Will Bateman (March 2005)
Source Code

Source code is available when you agree to a GP Licence or buy a Commercial Licence.

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