14. Package STANDARD
PACKAGE
STANDARD
IS
-- predefined enumeration types:
TYPE
severity_level
IS
( note, warning, error, failure ) ;
TYPE
boolean
IS
( false, true ) ;
TYPE
bit
IS
( '0', '1' ) ;
TYPE
character
IS
( NUL, SOH, STX, ETX, EOT, ENQ, ACK, BEL, BS, HT, LF, VT,
FF, CR, SO, SI, DLE, DC1, DC2, DC3, DC4, NAK, SYN, ETB, CAN, EM, SUB, ESC,
FSP, GSP, RSP, USP, ' ', '!', '"', '#', '$', '%', '&', ''', '(', ')', '*',
'+', ',', '-', '.', '/', '0', '1', '2', '3', '4', '5', '6', '7', '8', '9',
':', ';', '<', '=', '>', '?', '@','A', 'B', 'C', 'D', 'E', 'F', 'G', 'H', 'I',
'J', 'K', 'L', 'M', 'N', 'O', 'P', 'Q', 'R', 'S', 'T', 'U', 'V', 'W', 'X',
'Y', 'Z',' '[', '", ']', '^', '_', '`', 'a', 'b', 'c', 'd', 'e', 'f', 'g',
'h', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r', 's', 't', 'u', 'v',
'w', 'x', 'y', 'z',' '{', '|', '}', '~', DEL, C128, C129, C130, C131, C132,
C133, C134, C135, C136, C137,C138, C139, C140, C141, C142, C143, C144, C145,
C146, C147, C148, C149, C150, C151, C152, C153, C154,C155, C156, C157, C158,
C159, '?', '¡', '¢', '£', '¤', '¥', '?', '§', '¨', '©', 'ª', '«', '¬', '|',
'®', '¯', '°', '±', '2', '3','´', '', '¶', '·', '¸', '1', 'º', '»', '
', '
',
'
', '¿', 'À', 'Á', 'Â', 'Ã', 'Ä', 'Å', 'Æ', 'Ç', 'È', 'É', 'Ê', 'Ì', 'í',
'Î', 'Ï', '?', 'Ñ', 'Ò', 'Ó', 'Ô', 'Õ', 'Ö', '
', 'Ø', 'Ù', 'Ú', 'Û', 'Ü',
'Y', 'P', 'ß', 'à', 'á', 'â', 'ã', 'ä', 'å', 'æ', 'ç', 'è', 'é','ê', 'ì', 'í',
'î', 'ï', '?', 'ñ', 'ò', 'ó', 'ô', 'õ', 'ö', '', 'ø', 'ù', 'ú', 'û', 'ü',
'y', 'p', 'ÿ');
-- predefined numeric types :
TYPE
integer
IS RANGE
implementation_defined ;
TYPE
real
IS RANGE
implementation_defined ;
-- predefined type time :
TYPE
time
IS RANGE
implementation_defined
UNITS
fs ; --Femtosekunde
ps = 1000 fs ; --Picosekunde
ns = 1000 ps ; --Nanosekunde
us = 1000 ns ; --Microsekunde
ms = 1000 us ; --Millisekunde
sec = 1000 ms ; --Sekunde
min = 60 sec ; --Minute
hr = 60 min ; --Stunde
END UNITS
;
SUBTYPE
delay_length
IS
time
RANGE
0 fs
TO
TIME'HIGH
;
-- function that returns the current simulation time :
IMPURE FUNCTION
now
RETURN
delay_length ;
-- predefined numeric subtypes :
SUBTYPE
natural
IS
integer
RANGE
0
TO
integer'high ;
SUBTYPE
positive
IS
integer
RANGE
1
TO
integer'high ;
-- predefined array types :
TYPE
string
IS ARRAY
( positive
RANGE
<> )
OF
character ;
TYPE
bit_vector
IS ARRAY
( natural
RANGE
<> )
OF
bit ;
-- predefined types for opening files :
TYPE
file_open_kind
IS
(
READ_MODE
,
WRITE_MODE
,
APPEND_MODE
) ;
TYPE
file_open_status
IS
(
OPEN_OK
,
STATUS_ERROR
,
NAME_ERROR
,
MODE_ERROR
) ;
-- the `foreign attribute:
ATTRIBUTE
foreign: string ;
END
STANDARD ;