Re: %s format question in $display

From: Bruce LaVigne (bruce@hp.com)
Date: Tue Feb 24 2004 - 11:52:58 PST

  • Next message: Steven Sharp: "Re: %s format question in $display"

    As a user, I have taken the "...and leading zeros are never printed" to mean
    that the string is not preceeded by ascii "0" character(s); but the size of
    displayed data still reflects the presence or absence of the 0 in the format
    string (%s vs. %0s). This is important when formatting data in fields -
    please do not break this behaviour (that is, I agree wholeheartedly with Steven)!

    -bruce

    Steven Sharp wrote:
    > Note that examples like the one in 2.6.2 are not normative. And in this
    > case, it would have been very easy for leading blanks in the example output
    > to have been lost during document formatting.
    >
    > The text in 17.1.1.7 is more of an issue. It is my belief that this text
    > is simply wrong.
    >
    > I have traced both sets of text back. The same text appears in the 1995
    > IEEE standard, the 1993 OVI 2.0 standard, and the Verilog-XL Reference
    > Manual. This does not match the behavior of Verilog-XL, which prints
    > leading zero bytes as blanks. The behavior in Verilog-XL appears to be
    > deliberate, since the %0s format does eliminate the leading blanks for
    > zero bytes. It seems clear that this was a documentation error in the
    > XL manual, which has been copied into subsequent specifications.
    >
    > As Mac notes, this would be consistent with the behavior of other formats,
    > where leading zeros or spaces are printed unless a 0 appears after the %.
    > I will file an erratum on this.
    >
    > Steven Sharp
    > sharp@cadence.com
    >
    > 

    -- 
Bruce LaVigne                           ASIC Design Engineer
Hewlett-Packard Company                 ProCurve Networking Business
8000 Foothills Blvd, m/s 5672           phone: (916) 785-4194
Roseville, CA  95747-5672               email: bruce@hp.com

    This archive was generated by hypermail 2.1.4 : Tue Feb 24 2004 - 11:38:02 PST and
    sponsored by Boyd Technology, Inc.