[wget-notify] [bug #23713] Prefixes do not match

[anonymous]

URL:
  <http://savannah.gnu.org/bugs/?23713>

                 Summary: Prefixes do not match 
                 Project: GNU Wget
            Submitted by: None
            Submitted on: Thursday 06/26/08 at 12:28 UTC
                Category: User Interface
                Severity: 3 - Normal
                Priority: 5 - Normal
                  Status: None
                 Privacy: Public
             Assigned to: None
         Originator Name: Albert Oliver
        Originator Email: brosaj at gmail.com
             Open/Closed: Open
         Discussion Lock: Any
                 Release: 1.11.3
        Operating System: GNU/Linux
         Reproducibility: Every Time
           Fixed Release: None
         Planned Release: None
              Regression: None
           Work Required: None
          Patch Included: None

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Details:

Wget displays or refers to quantities using power-of-two units (e.g. 1024,
1048576, etc.) but incorrectly applies prefixes that are defined as
power-of-ten units (e.g. the prefix 'k' is 1000, 'M' i 1000000, etc.).

I've just found the next one:
Length: 19,189,400 (18M)

It'ld have to be marked as:
   19MB (as 19 * 10^9 B)
   10MiB (as 18 * 2^20 B)

Further explanation can be found at IEC[0], BIPM[1], wikipedia[2], and the US
National Institute of Science and Technology[3]. There is software that
correctly apply powers-of-ten and powers-of-two units to the corresponding
quantities including 'linux' and 'coreutils', along with many application
packages[4].

This bug report asks that the software be modified such that quantities and
unit prefixes are in agreement as per the standards. This is done by changing
either (or both) the quantity calculations or the unit prefixes such that they
correspond correctly according to the relevant standards.
For example, if a quantity of 8178892 bytes is displayed as "7.8 MB", this is
incorrectly showing a power-of-two quantity with a
power-of-ten unit. This can be resolved either by displaying the quantity as
"7.8 MiB" (power-of-two quantity and unit) or as "8.18 MB" (power-of-ten
quantity and unit). The degree of precision and rounding follows normal rules;
what is addressed here is that the quantity and unit agree.

Similarly, if the software interprets input in power-of-two units, the
program prompts and documentation should specify the correct unit for this.
E.g. input which will be interpreted in units of 1024 bytes should be prompted
for as "kibibytes" or "KiB", and the documentation should not refer to some
other unit for the input.

[0] http://www.iec.ch/zone/si/si_bytes.htm
[1] http://www.bipm.fr/en/si/prefixes.html
[2] http://en.wikipedia.org/wiki/Binary_prefix
[3] http://physics.nist.gov/cuu/Units/prefixes.html
[4] http://en.wikipedia.org/wiki/Binary_prefix#Adoption




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