NAME

Verilog::Language - Verilog language utilities

SYNOPSIS

  use Verilog::Language;

  $result = Verilog::Language::is_keyword ($symbol_string)
  $result = Verilog::Language::is_compdirect ($symbol_string)
  $result = Verilog::Language::number_value ($number_string)
  $result = Verilog::Language::number_bits  ($number_string)
  @vec    = Verilog::Language::split_bus ($bus)

DESCRIPTION

This package provides useful utilities for general use with the Verilog Language. General functions will be added as needed.

Verilog::Language::is_keyword ($symbol_string)

Return true if the given symbol string is a Verilog reserved keyword.

EXAMPLE

  print Verilog::Language::is_keyword ("module");
     1
  print Verilog::Language::is_keyword ("signalname");
     undef

Verilog::Language::is_compdirect ($symbol_string)

Return true if the given symbol string is a Verilog compiler directive.

EXAMPLE

  print Verilog::Language::is_compdirect ("`include");
     1
  print Verilog::Language::is_compdirect ("`MYDEFINE");
     undef

Verilog::Language::number_value ($number_string)

Return the numeric value of a Verilog value, or undef if incorrectly formed. Since it is returned as a signed integer, it may fail for over 31 bit integers.

EXAMPLE

  print Verilog::Language::number_value ("32'h13");
     19
  print Verilog::Language::number_value ("32'p2");
     undef

Verilog::Language::number_bits ($number_string)

Return the number of bits in a value string, or undef if incorrectly formed, _or_ not specified.

EXAMPLE

  print Verilog::Language::number_bits ("32'h13");
     32

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.

DISTRIBUTION

The latest version is available from http://veripool.com/verilog-perl.

SEE ALSO

Verilog::Parser, Verilog::ParseSig, Verilog::Getopt,

AUTHORS

Wilson Snyder <wsnyder@wsnyder.org>