class interface STD_INPUT_OUTPUT
--
-- To have the useful io of class ANY.
--
creation
make
feature(s) from INPUT_STREAM
-- State of the stream:
is_connected: BOOLEAN
end_of_input: BOOLEAN
-- Has end-of-input been reached ?
-- True when the last character has been read.
require
is_connected
feature(s) from INPUT_STREAM
-- To read one character at a time:
read_character
-- Read a character and assign it to last_character.
require
is_connected;
not end_of_input
ensure
not push_back_flag
last_character: CHARACTER
-- Last character read with read_character.
require
is_connected
push_back_flag: BOOLEAN
-- True if one char is already pushed back.
require
is_connected
unread_character
-- Un-read the last character read.
require
not push_back_flag
ensure
push_back_flag
feature(s) from INPUT_STREAM
-- Skipping separators:
skip_separators
-- Skip all separators (see is_separator of class CHARACTER) and
-- make the first non-separator available in last_character. This
-- non-separator character is pushed back into the stream (see
-- unread_character) to be available one more time (the next
-- read_character will consider this non-separator). When
-- end_of_input occurs, this process is automatically stopped.
require
is_connected;
not end_of_input
skip_separators_using (separators: STRING)
-- Same job as skip_separators using the separators set.
require
is_connected;
separators /= Void;
not end_of_input
skip_remainder_of_line
-- Skip all the remainder of the line including the end of
-- line character itself.
feature(s) from INPUT_STREAM
-- To read one number at a time:
read_integer
-- Read an integer according to the Eiffel syntax.
-- Make result available in last_integer.
-- Heading separators are automatically skipped using
-- is_separator of class CHARACTER.
-- Trailing separators are not skipped.
require
is_connected;
not end_of_input
last_integer: INTEGER
-- Last integer read using read_integer.
read_real
-- Read a REAL and make the result available in last_real
-- and in last_double.
-- The integral part is available in last_integer.
require
is_connected;
not end_of_input
last_real: REAL
-- Last real read with read_real.
read_double
-- Read a DOUBLE and make the result available in last_double.
require
is_connected;
not end_of_input
last_double: DOUBLE
-- Last double read with read_double.
feature(s) from INPUT_STREAM
-- To read one line or one word at a time:
last_string: STRING
-- Access to the unique common buffer to get for example the result
-- computed by read_line, read_word, newline, etc. This is a
-- once function (the same common buffer is used for all streams).
read_line
-- Read a complete line ended by '%N' or end_of_input. Make the
-- result available in last_string common buffer. The end of line
-- character (usually '%N') is not added in the last_string buffer.
require
is_connected;
not end_of_input
read_word
-- Read a word using is_separator of class CHARACTER. Result is
-- available in the last_string common buffer. Heading separators are
-- automatically skipped. Trailing separators are not skipped
-- (last_character is left on the first one). If end_of_input is
-- encountered, Result can be the empty string.
require
is_connected;
not end_of_input
newline
-- Consume input until newline ('%N') is found. Corresponding
-- STRING is stored in last_string common buffer.
reach_and_skip (keyword: STRING)
-- Try to skip enough characters in order to reach the keyword
-- which is skipped too. If the keyword is not in the remainder of
-- this stream, the process is stopped as soon as end_of_input
-- occurs. As for skip_separators the following character of the
-- keyword is available in last_character and not yet read.
require
not keyword.is_empty
ensure
not end_of_input implies last_string.is_equal(keyword)
feature(s) from INPUT_STREAM
-- Other features:
read_line_in (str: STRING)
-- Same jobs as read_line but storage is directly done in buffer.
--
require
is_connected;
not end_of_input;
str /= Void
read_word_using (separators: STRING)
-- Same jobs as read_word using separators.
require
is_connected;
not end_of_input;
separators /= Void
read_tail_in (str: STRING)
-- Read all remaining character of the file in str.
require
is_connected;
str /= Void
ensure
end_of_input
feature(s) from OUTPUT_STREAM
-- To write one character at a time:
put_character (c: CHARACTER)
require
is_connected
feature(s) from OUTPUT_STREAM
put_string (s: STRING)
-- Output s to current output device.
require
is_connected;
s /= Void
put_unicode_string (unicode_string: UNICODE_STRING)
-- Output the UTF-8 encoding of the unicode_string.
require
unicode_string /= Void
feature(s) from OUTPUT_STREAM
-- To write a number:
put_integer (i: INTEGER_64)
-- Output i to current output device.
require
is_connected
put_integer_format (i: INTEGER_64; s: INTEGER)
-- Output i to current output device using at most s character.
require
is_connected
put_real (r: REAL)
-- Output r to current output device.
require
is_connected
put_real_format (r: REAL; f: INTEGER)
-- Output r with only f digit for the fractionnal part.
-- Examples:
-- put_real(3.519,2) print "3.51".
require
is_connected;
f >= 0
put_double (d: DOUBLE)
-- Output d to current output device.
require
is_connected
put_double_format (d: DOUBLE; f: INTEGER)
-- Output d with only f digit for the fractionnal part.
-- Examples:
-- put_double(3.519,2) print "3.51".
require
is_connected;
f >= 0
put_number (number: NUMBER)
-- Output the number.
require
number /= Void
feature(s) from OUTPUT_STREAM
-- Other features:
put_boolean (b: BOOLEAN)
-- Output b to current output device according
-- to the Eiffel format.
require
is_connected
put_pointer (p: POINTER)
-- Output a viewable version of p.
require
is_connected
put_new_line
-- Output a newline character.
require
is_connected
put_spaces (nb: INTEGER)
-- Output nb spaces character.
require
nb >= 0
append_file (file_name: STRING)
require
is_connected;
file_exists(file_name)
flush
-- forces a write of unwritten character (write my have been
-- delayed, flush writes buffered characters)
feature(s) from STD_INPUT_OUTPUT
make
feature(s)
end of STD_INPUT_OUTPUT