Language(3pm) User Contributed Perl Documentation Language(3pm)
NAME
Verilog::Language - Verilog language utilities
SYNOPSIS
use Verilog::Language;
$result = Verilog::Language::is_keyword ("wire"); # true
$result = Verilog::Language::is_compdirect ("`notundef"); # false
$result = Verilog::Language::number_value ("4'b111"); # 8
$result = Verilog::Language::number_bits ("32'h1b"); # 32
$result = Verilog::Language::number_signed ("1'sh1"); # 1
@vec = Verilog::Language::split_bus ("[31,5:4]"); # 31, 5, 4
@vec = Verilog::Language::split_bus_nocomma ("[31:29]"); # 31, 30, 29
$result = Verilog::Language::strip_comments ("a/*b*/c"); # ac
DESCRIPTION
Verilog::Language provides general utilities for using the Verilog Language, such as parsing numbers or determining what keywords exist.
General functions will be added as needed.
FUNCTIONS
Verilog::Language::is_keyword ($symbol_string)
Return true if the given symbol string is a Verilog reserved keyword. Value indicates the language standard as per the `begin_keywords
macro, '1364-1995', '1364-2001', '1364-2005', '1800-2005', '1800-2009' or 'VAMS'.
Verilog::Language::is_compdirect ($symbol_string)
Return true if the given symbol string is a Verilog compiler directive.
Verilog::Language::is_gateprim ($symbol_string)
Return true if the given symbol is a built in gate primitive; for example "buf", "xor", etc.
Verilog::Language::language_keywords ($year)
Returns a hash for keywords for given language standard year, where the value of the hash is the standard in which it was defined.
Verilog::Language::language_standard ($year)
Sets the language standard to indicate what are keywords. If undef, all standards apply. The year is indicates the language standard
as per the `begin_keywords macro, '1364-1995', '1364-2001', '1364-2005', '1800-2005' or '1800-2009'.
Verilog::Language::language_maximum
Returns the greatest language currently standardized, presently '1800-2009'.
Verilog::Language::number_bigint ($number_string)
Return the numeric value of a Verilog value stored as a Math::BigInt, or undef if incorrectly formed. You must 'use Math::BigInt'
yourself before calling this function. Note bigints do not have an exact size, so NOT of a Math::BigInt may return a different value
than verilog. See also number_value and number_bitvector.
Verilog::Language::number_bits ($number_string)
Return the number of bits in a value string, or undef if incorrectly formed, _or_ not specified.
Verilog::Language::number_bitvector ($number_string)
Return the numeric value of a Verilog value stored as a Bit::Vector, or undef if incorrectly formed. You must 'use Bit::Vector'
yourself before calling this function. The size of the Vector will be that returned by number_bits.
Verilog::Language::number_signed ($number_string)
Return true if the Verilog value is signed, else undef.
Verilog::Language::number_value ($number_string)
Return the numeric value of a Verilog value, or undef if incorrectly formed. It ignores any signed Verilog attributes, but is is
returned as a perl signed integer, so it may fail for over 31 bit values. See also number_bigint and number_bitvector.
Verilog::Language::split_bus ($bus)
Return a list of expanded arrays. When passed a string like "foo[5:1:2,10:9]", it will return a array with ("foo[5]", "foo[3]", ...).
It correctly handles connectivity expansion also, so that "x[1:0] = y[3:0]" will get intuitive results.
Verilog::Language::split_bus_nocomma ($bus)
As with split_bus, but faster. Only supports simple decimal colon separated array specifications, such as "foo[3:0]".
Verilog::Language::strip_comments ($text)
Return text with any // or /**/ comments stripped, correctly handing quoted strings. Newlines will be preserved in this process.
DISTRIBUTION
Verilog-Perl is part of the <http://www.veripool.org/> free Verilog EDA software tool suite. The latest version is available from CPAN and
from http://www.veripool.org/verilog-perl <http://www.veripool.org/verilog-perl>.
Copyright 2000-2012 by Wilson Snyder. This package is free software; you can redistribute it and/or modify it under the terms of either
the GNU Lesser General Public License Version 3 or the Perl Artistic License Version 2.0.
AUTHORS
Wilson Snyder <wsnyder@wsnyder.org>
SEE ALSO
Verilog-Perl, Verilog::EditFiles Verilog::Parser, Verilog::ParseSig, Verilog::Getopt
And the http://www.veripool.org/verilog-mode <http://www.veripool.org/verilog-mode>Verilog-Mode package for Emacs.
perl v5.14.2 2012-05-04 Language(3pm)