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[/] [present/] [trunk/] [32BitIO/] [bench/] [vhdl/] [txt_util.vhd] - Diff between revs 3 and 4

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library ieee;
 
use ieee.std_logic_1164.all;
 
use std.textio.all;
 
 
 
 
 
package txt_util is
 
 
 
    -- prints a message to the screen
 
    procedure print(text: string);
 
 
 
    -- prints the message when active
 
    -- useful for debug switches
 
    procedure print(active: boolean; text: string);
 
 
 
    -- converts std_logic into a character
 
    function chr(sl: std_logic) return character;
 
 
 
    -- converts std_logic into a string (1 to 1)
 
    function str(sl: std_logic) return string;
 
 
 
    -- converts std_logic_vector into a string (binary base)
 
    function str(slv: std_logic_vector) return string;
 
 
 
    -- converts boolean into a string
 
    function str(b: boolean) return string;
 
 
 
    -- converts an integer into a single character
 
    -- (can also be used for hex conversion and other bases)
 
    function chr(int: integer) return character;
 
 
 
    -- converts integer into string using specified base
 
    function str(int: integer; base: integer) return string;
 
 
 
    -- converts integer to string, using base 10
 
    function str(int: integer) return string;
 
 
 
    -- convert std_logic_vector into a string in hex format
 
    function hstr(slv: std_logic_vector) return string;
 
 
 
 
 
    -- functions to manipulate strings
 
    -----------------------------------
 
 
 
    -- convert a character to upper case
 
    function to_upper(c: character) return character;
 
 
 
    -- convert a character to lower case
 
    function to_lower(c: character) return character;
 
 
 
    -- convert a string to upper case
 
    function to_upper(s: string) return string;
 
 
 
    -- convert a string to lower case
 
    function to_lower(s: string) return string;
 
 
 
 
 
 
 
    -- functions to convert strings into other formats
 
    --------------------------------------------------
 
 
 
    -- converts a character into std_logic
 
    function to_std_logic(c: character) return std_logic;
 
 
 
    -- converts a string into std_logic_vector
 
    function to_std_logic_vector(s: string) return std_logic_vector;
 
 
 
 
 
 
 
    -- file I/O
 
    -----------
 
 
 
    -- read variable length string from input file
 
    procedure str_read(file in_file: TEXT;
 
                       res_string: out string);
 
 
 
    -- print string to a file and start new line
 
    procedure print(file out_file: TEXT;
 
                    new_string: in  string);
 
 
 
    -- print character to a file and start new line
 
    procedure print(file out_file: TEXT;
 
                    char:       in  character);
 
 
 
end txt_util;
 
 
 
 
 
 
 
 
 
package body txt_util is
 
 
 
 
 
 
 
 
 
   -- prints text to the screen
 
 
 
   procedure print(text: string) is
 
     variable msg_line: line;
 
     begin
 
       write(msg_line, text);
 
       writeline(output, msg_line);
 
   end print;
 
 
 
 
 
 
 
 
 
   -- prints text to the screen when active
 
 
 
   procedure print(active: boolean; text: string)  is
 
     begin
 
      if active then
 
         print(text);
 
      end if;
 
   end print;
 
 
 
 
 
   -- converts std_logic into a character
 
 
 
   function chr(sl: std_logic) return character is
 
    variable c: character;
 
    begin
 
      case sl is
 
         when 'U' => c:= 'U';
 
         when 'X' => c:= 'X';
 
         when '0' => c:= '0';
 
         when '1' => c:= '1';
 
         when 'Z' => c:= 'Z';
 
         when 'W' => c:= 'W';
 
         when 'L' => c:= 'L';
 
         when 'H' => c:= 'H';
 
         when '-' => c:= '-';
 
      end case;
 
    return c;
 
   end chr;
 
 
 
 
 
 
 
   -- converts std_logic into a string (1 to 1)
 
 
 
   function str(sl: std_logic) return string is
 
    variable s: string(1 to 1);
 
    begin
 
        s(1) := chr(sl);
 
        return s;
 
   end str;
 
 
 
 
 
 
 
   -- converts std_logic_vector into a string (binary base)
 
   -- (this also takes care of the fact that the range of
 
   --  a string is natural while a std_logic_vector may
 
   --  have an integer range)
 
 
 
   function str(slv: std_logic_vector) return string is
 
     variable result : string (1 to slv'length);
 
     variable r : integer;
 
   begin
 
     r := 1;
 
     for i in slv'range loop
 
        result(r) := chr(slv(i));
 
        r := r + 1;
 
     end loop;
 
     return result;
 
   end str;
 
 
 
 
 
   function str(b: boolean) return string is
 
 
 
    begin
 
       if b then
 
          return "true";
 
      else
 
        return "false";
 
       end if;
 
    end str;
 
 
 
 
 
   -- converts an integer into a character
 
   -- for 0 to 9 the obvious mapping is used, higher
 
   -- values are mapped to the characters A-Z
 
   -- (this is usefull for systems with base > 10)
 
   -- (adapted from Steve Vogwell's posting in comp.lang.vhdl)
 
 
 
   function chr(int: integer) return character is
 
    variable c: character;
 
   begin
 
        case int is
 
          when  0 => c := '0';
 
          when  1 => c := '1';
 
          when  2 => c := '2';
 
          when  3 => c := '3';
 
          when  4 => c := '4';
 
          when  5 => c := '5';
 
          when  6 => c := '6';
 
          when  7 => c := '7';
 
          when  8 => c := '8';
 
          when  9 => c := '9';
 
          when 10 => c := 'A';
 
          when 11 => c := 'B';
 
          when 12 => c := 'C';
 
          when 13 => c := 'D';
 
          when 14 => c := 'E';
 
          when 15 => c := 'F';
 
          when 16 => c := 'G';
 
          when 17 => c := 'H';
 
          when 18 => c := 'I';
 
          when 19 => c := 'J';
 
          when 20 => c := 'K';
 
          when 21 => c := 'L';
 
          when 22 => c := 'M';
 
          when 23 => c := 'N';
 
          when 24 => c := 'O';
 
          when 25 => c := 'P';
 
          when 26 => c := 'Q';
 
          when 27 => c := 'R';
 
          when 28 => c := 'S';
 
          when 29 => c := 'T';
 
          when 30 => c := 'U';
 
          when 31 => c := 'V';
 
          when 32 => c := 'W';
 
          when 33 => c := 'X';
 
          when 34 => c := 'Y';
 
          when 35 => c := 'Z';
 
          when others => c := '?';
 
        end case;
 
        return c;
 
    end chr;
 
 
 
 
 
 
 
   -- convert integer to string using specified base
 
   -- (adapted from Steve Vogwell's posting in comp.lang.vhdl)
 
 
 
   function str(int: integer; base: integer) return string is
 
 
 
    variable temp:      string(1 to 10);
 
    variable num:       integer;
 
    variable abs_int:   integer;
 
    variable len:       integer := 1;
 
    variable power:     integer := 1;
 
 
 
   begin
 
 
 
    -- bug fix for negative numbers
 
    abs_int := abs(int);
 
 
 
    num     := abs_int;
 
 
 
    while num >= base loop                     -- Determine how many
 
      len := len + 1;                          -- characters required
 
      num := num / base;                       -- to represent the
 
    end loop ;                                 -- number.
 
 
 
    for i in len downto 1 loop                 -- Convert the number to
 
      temp(i) := chr(abs_int/power mod base);  -- a string starting
 
      power := power * base;                   -- with the right hand
 
    end loop ;                                 -- side.
 
 
 
    -- return result and add sign if required
 
    if int < 0 then
 
       return '-'& temp(1 to len);
 
     else
 
       return temp(1 to len);
 
    end if;
 
 
 
   end str;
 
 
 
 
 
  -- convert integer to string, using base 10
 
  function str(int: integer) return string is
 
 
 
   begin
 
 
 
    return str(int, 10) ;
 
 
 
   end str;
 
 
 
 
 
 
 
   -- converts a std_logic_vector into a hex string.
 
   function hstr(slv: std_logic_vector) return string is
 
       variable hexlen: integer;
 
       variable longslv : std_logic_vector(67 downto 0) := (others => '0');
 
       variable hex : string(1 to 16);
 
       variable fourbit : std_logic_vector(3 downto 0);
 
     begin
 
       hexlen := (slv'left+1)/4;
 
       if (slv'left+1) mod 4 /= 0 then
 
         hexlen := hexlen + 1;
 
       end if;
 
       longslv(slv'left downto 0) := slv;
 
       for i in (hexlen -1) downto 0 loop
 
         fourbit := longslv(((i*4)+3) downto (i*4));
 
         case fourbit is
 
           when "0000" => hex(hexlen -I) := '0';
 
           when "0001" => hex(hexlen -I) := '1';
 
           when "0010" => hex(hexlen -I) := '2';
 
           when "0011" => hex(hexlen -I) := '3';
 
           when "0100" => hex(hexlen -I) := '4';
 
           when "0101" => hex(hexlen -I) := '5';
 
           when "0110" => hex(hexlen -I) := '6';
 
           when "0111" => hex(hexlen -I) := '7';
 
           when "1000" => hex(hexlen -I) := '8';
 
           when "1001" => hex(hexlen -I) := '9';
 
           when "1010" => hex(hexlen -I) := 'A';
 
           when "1011" => hex(hexlen -I) := 'B';
 
           when "1100" => hex(hexlen -I) := 'C';
 
           when "1101" => hex(hexlen -I) := 'D';
 
           when "1110" => hex(hexlen -I) := 'E';
 
           when "1111" => hex(hexlen -I) := 'F';
 
           when "ZZZZ" => hex(hexlen -I) := 'z';
 
           when "UUUU" => hex(hexlen -I) := 'u';
 
           when "XXXX" => hex(hexlen -I) := 'x';
 
           when others => hex(hexlen -I) := '?';
 
         end case;
 
       end loop;
 
       return hex(1 to hexlen);
 
     end hstr;
 
 
 
 
 
 
 
   -- functions to manipulate strings
 
   -----------------------------------
 
 
 
 
 
   -- convert a character to upper case
 
 
 
   function to_upper(c: character) return character is
 
 
 
      variable u: character;
 
 
 
    begin
 
 
 
       case c is
 
        when 'a' => u := 'A';
 
        when 'b' => u := 'B';
 
        when 'c' => u := 'C';
 
        when 'd' => u := 'D';
 
        when 'e' => u := 'E';
 
        when 'f' => u := 'F';
 
        when 'g' => u := 'G';
 
        when 'h' => u := 'H';
 
        when 'i' => u := 'I';
 
        when 'j' => u := 'J';
 
        when 'k' => u := 'K';
 
        when 'l' => u := 'L';
 
        when 'm' => u := 'M';
 
        when 'n' => u := 'N';
 
        when 'o' => u := 'O';
 
        when 'p' => u := 'P';
 
        when 'q' => u := 'Q';
 
        when 'r' => u := 'R';
 
        when 's' => u := 'S';
 
        when 't' => u := 'T';
 
        when 'u' => u := 'U';
 
        when 'v' => u := 'V';
 
        when 'w' => u := 'W';
 
        when 'x' => u := 'X';
 
        when 'y' => u := 'Y';
 
        when 'z' => u := 'Z';
 
        when others => u := c;
 
    end case;
 
 
 
      return u;
 
 
 
   end to_upper;
 
 
 
 
 
   -- convert a character to lower case
 
 
 
   function to_lower(c: character) return character is
 
 
 
      variable l: character;
 
 
 
    begin
 
 
 
       case c is
 
        when 'A' => l := 'a';
 
        when 'B' => l := 'b';
 
        when 'C' => l := 'c';
 
        when 'D' => l := 'd';
 
        when 'E' => l := 'e';
 
        when 'F' => l := 'f';
 
        when 'G' => l := 'g';
 
        when 'H' => l := 'h';
 
        when 'I' => l := 'i';
 
        when 'J' => l := 'j';
 
        when 'K' => l := 'k';
 
        when 'L' => l := 'l';
 
        when 'M' => l := 'm';
 
        when 'N' => l := 'n';
 
        when 'O' => l := 'o';
 
        when 'P' => l := 'p';
 
        when 'Q' => l := 'q';
 
        when 'R' => l := 'r';
 
        when 'S' => l := 's';
 
        when 'T' => l := 't';
 
        when 'U' => l := 'u';
 
        when 'V' => l := 'v';
 
        when 'W' => l := 'w';
 
        when 'X' => l := 'x';
 
        when 'Y' => l := 'y';
 
        when 'Z' => l := 'z';
 
        when others => l := c;
 
    end case;
 
 
 
      return l;
 
 
 
   end to_lower;
 
 
 
 
 
 
 
   -- convert a string to upper case
 
 
 
   function to_upper(s: string) return string is
 
 
 
     variable uppercase: string (s'range);
 
 
 
   begin
 
 
 
     for i in s'range loop
 
        uppercase(i):= to_upper(s(i));
 
     end loop;
 
     return uppercase;
 
 
 
   end to_upper;
 
 
 
 
 
 
 
   -- convert a string to lower case
 
 
 
   function to_lower(s: string) return string is
 
 
 
     variable lowercase: string (s'range);
 
 
 
   begin
 
 
 
     for i in s'range loop
 
        lowercase(i):= to_lower(s(i));
 
     end loop;
 
     return lowercase;
 
 
 
   end to_lower;
 
 
 
 
 
 
 
-- functions to convert strings into other types
 
 
 
 
 
-- converts a character into a std_logic
 
 
 
function to_std_logic(c: character) return std_logic is
 
    variable sl: std_logic;
 
    begin
 
      case c is
 
        when 'U' =>
 
           sl := 'U';
 
        when 'X' =>
 
           sl := 'X';
 
        when '0' =>
 
           sl := '0';
 
        when '1' =>
 
           sl := '1';
 
        when 'Z' =>
 
           sl := 'Z';
 
        when 'W' =>
 
           sl := 'W';
 
        when 'L' =>
 
           sl := 'L';
 
        when 'H' =>
 
           sl := 'H';
 
        when '-' =>
 
           sl := '-';
 
        when others =>
 
           sl := 'X';
 
    end case;
 
   return sl;
 
  end to_std_logic;
 
 
 
 
 
-- converts a string into std_logic_vector
 
 
 
function to_std_logic_vector(s: string) return std_logic_vector is
 
  variable slv: std_logic_vector(s'high-s'low downto 0);
 
  variable k: integer;
 
begin
 
   k := s'high-s'low;
 
  for i in s'range loop
 
     slv(k) := to_std_logic(s(i));
 
     k      := k - 1;
 
  end loop;
 
  return slv;
 
end to_std_logic_vector;
 
 
 
 
 
 
 
 
 
 
 
 
 
----------------
 
--  file I/O  --
 
----------------
 
 
 
 
 
 
 
-- read variable length string from input file
 
 
 
procedure str_read(file in_file: TEXT;
 
                   res_string: out string) is
 
 
 
       variable l:         line;
 
       variable c:         character;
 
       variable is_string: boolean;
 
 
 
   begin
 
 
 
     readline(in_file, l);
 
     -- clear the contents of the result string
 
     for i in res_string'range loop
 
         res_string(i) := ' ';
 
     end loop;
 
     -- read all characters of the line, up to the length  
 
     -- of the results string
 
     for i in res_string'range loop
 
        read(l, c, is_string);
 
        res_string(i) := c;
 
        if not is_string then -- found end of line
 
           exit;
 
        end if;
 
     end loop;
 
 
 
end str_read;
 
 
 
 
 
-- print string to a file
 
procedure print(file out_file: TEXT;
 
                new_string: in  string) is
 
 
 
       variable l: line;
 
 
 
   begin
 
 
 
     write(l, new_string);
 
     writeline(out_file, l);
 
 
 
end print;
 
 
 
 
 
-- print character to a file and start new line
 
procedure print(file out_file: TEXT;
 
                char: in  character) is
 
 
 
       variable l: line;
 
 
 
   begin
 
 
 
     write(l, char);
 
     writeline(out_file, l);
 
 
 
end print;
 
 
 
 
 
 
 
-- appends contents of a string to a file until line feed occurs
 
-- (LF is considered to be the end of the string)
 
 
 
procedure str_write(file out_file: TEXT;
 
                    new_string: in  string) is
 
 begin
 
 
 
   for i in new_string'range loop
 
      print(out_file, new_string(i));
 
      if new_string(i) = LF then -- end of string
 
         exit;
 
      end if;
 
   end loop;
 
 
 
end str_write;
 
 
 
 
 
 
 
 
 
end txt_util;
 
 
 
 
 
 
 
 
 
 
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