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Re: signed int64 pack/unpack

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On 1/11/2014 10:11 PM, Ben Bacarisse wrote:
> Jerry Stuckle <jstucklex@attglobal.net> writes:
>
>> On 1/11/2014 9:42 PM, Ben Bacarisse wrote:
>>> cameron7@gmail.com writes:
>>>
>>>> I'm having a bit of trouble figuring out a straightforward way to
>>>> "pack" / "unpack" a signed int64.
>>>>
>>>> I'm on a 64-bit machine, but the 'i' and 'I' are coming back with
>>>> 4-byte length.
>>>
>>> There is no explicit format for 64-bit ints.  The i/I formats are used
>>> for a native "int" but that need not be 64 bits on a 64-bit machine.
>>> The function is borrowed from Perl whose documentation says a bit more
>>>
>>>     This 'integer' is _at_least_ 32 bits wide.  Its exact size depends on
>>>     what a local C compiler calls 'int'.
>               ^^^^^^^^^^^^^^^^^^^^^^^^^^^
>>> On my 64-bit Linux machine, 'int' is 32 bits.
>>
>> On my 64 bit Linux system, 'int' is 64 bits.  But then I have the 64
>> bit PHP version (and 64 bit OS) loaded.
>
> Yes, me too.
>
>> What do you get when you do:
>>
>> <?php
>> echo PHP_INT_MAX . "\n";
>> ?>
>
> Same as you but I don't think that's relevant.  PHP stores values
> internally using a C long.  I think the Perl document describes what's
> really happening.
>

It is totally relevant.  You can't operate on 64 bit values if you don't 
have 64 bit support.

And this is PHP, not Perl.  Things have changed a *lot* since the 
original versions were created.  Much of the Perl documentation no 
longer applies to PHP (if it ever did).

-- 
==================
Remove the "x" from my email address
Jerry Stuckle
jstucklex@attglobal.net
==================

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signed int64 pack/unpack cameron7@gmail.com - 2014-01-11 18:18 -0800
  Re: signed int64 pack/unpack Jerry Stuckle <jstucklex@attglobal.net> - 2014-01-11 21:35 -0500
    Re: signed int64 pack/unpack cameron7@gmail.com - 2014-01-11 18:46 -0800
      Re: signed int64 pack/unpack The Natural Philosopher <tnp@invalid.invalid> - 2014-01-12 02:59 +0000
        Re: signed int64 pack/unpack Jerry Stuckle <jstucklex@attglobal.net> - 2014-01-11 22:03 -0500
        Re: signed int64 pack/unpack cameron7@gmail.com - 2014-01-11 19:10 -0800
      Re: signed int64 pack/unpack Jerry Stuckle <jstucklex@attglobal.net> - 2014-01-11 22:04 -0500
  Re: signed int64 pack/unpack Ben Bacarisse <ben.usenet@bsb.me.uk> - 2014-01-12 02:42 +0000
    Re: signed int64 pack/unpack Jerry Stuckle <jstucklex@attglobal.net> - 2014-01-11 22:01 -0500
      Re: signed int64 pack/unpack cameron7@gmail.com - 2014-01-11 19:08 -0800
      Re: signed int64 pack/unpack Ben Bacarisse <ben.usenet@bsb.me.uk> - 2014-01-12 03:11 +0000
        Re: signed int64 pack/unpack Jerry Stuckle <jstucklex@attglobal.net> - 2014-01-11 22:15 -0500
          Re: signed int64 pack/unpack Ben Bacarisse <ben.usenet@bsb.me.uk> - 2014-01-12 12:37 +0000
            Re: signed int64 pack/unpack Jerry Stuckle <jstucklex@attglobal.net> - 2014-01-12 10:51 -0500
              Re: signed int64 pack/unpack Christoph Michael Becker <cmbecker69@arcor.de> - 2014-01-12 17:00 +0100
                Re: signed int64 pack/unpack Jerry Stuckle <jstucklex@attglobal.net> - 2014-01-12 16:09 -0500
                Re: signed int64 pack/unpack Ben Bacarisse <ben.usenet@bsb.me.uk> - 2014-01-12 22:35 +0000
                Re: signed int64 pack/unpack Jerry Stuckle <jstucklex@attglobal.net> - 2014-01-12 17:59 -0500
                Re: signed int64 pack/unpack Ben Bacarisse <ben.usenet@bsb.me.uk> - 2014-01-13 01:59 +0000
              Re: signed int64 pack/unpack Ben Bacarisse <ben.usenet@bsb.me.uk> - 2014-01-12 22:30 +0000
    Re: signed int64 pack/unpack cameron7@gmail.com - 2014-01-11 21:54 -0800
      Re: signed int64 pack/unpack cameron7@gmail.com - 2014-01-12 07:25 -0800
        Re: signed int64 pack/unpack Jerry Stuckle <jstucklex@attglobal.net> - 2014-01-12 11:11 -0500
        Re: signed int64 pack/unpack Ben Bacarisse <ben.usenet@bsb.me.uk> - 2014-01-12 23:27 +0000
          Re: signed int64 pack/unpack cameron7@gmail.com - 2014-01-12 16:03 -0800
          Re: signed int64 pack/unpack cameron7@gmail.com - 2014-01-12 16:22 -0800
            Re: signed int64 pack/unpack Ben Bacarisse <ben.usenet@bsb.me.uk> - 2014-01-13 01:20 +0000
  Re: signed int64 pack/unpack Christoph Michael Becker <cmbecker69@arcor.de> - 2014-01-12 17:37 +0100

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