deferred class INPUT_STREAM
Summary
Overview
features
  • recycle
    Do whatever needs to be done to free resources or recycle other objects when recycling this one
Skipping separators:
To read one number at a time:
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.
  • read_line
    Read a complete line ended by '%N' or end_of_input.%
  • read_available (limit: INTEGER_32)
    Read as many characters as possible, as long as the stream does not block and up to the given limit.
  • read_word
    Read a word using is_separator of class CHARACTER.
  • newline
    Consume input until newline ('%N') is found.
  • reach_and_skip (keyword: STRING)
    Try to skip enough characters in order to reach the keyword which is skipped too.
Other features:
read_character
effective procedure
If read_character fail, end_of_input is set.
read_line_in (buffer: STRING)
effective procedure
Same job as read_line but storage is directly done in buffer.
read_available_in (buffer: STRING, limit: INTEGER_32)
effective procedure
Same job as read_available but storage is directly done in buffer.
unread_character
effective procedure
last_character: CHARACTER
effective function
detach
effective procedure
Shake off the filter.
filtered_read_character
deferred procedure
filtered_unread_character
deferred procedure
filtered_last_character: CHARACTER
deferred function
filtered_read_available_in (buffer: STRING, limit: INTEGER_32)
effective procedure
filtered_read_line_in (buffer: STRING)
effective procedure
writable attribute
The filter that uses this stream as backend
event_can_read: EVENT_DESCRIPTOR
effective function
writable attribute
is_connected: BOOLEAN
deferred function
True if the stream is connected.
disconnect
deferred procedure
Try to disconnect the stream.
descriptor: INTEGER_32
effective function
Some OS-dependent descriptor.
has_descriptor: BOOLEAN
effective function
True if that stream can be associated to some OS-meaningful descriptor.
can_disconnect: BOOLEAN
deferred function
True if the stream can be safely disconnected (without data loss, etc.)
stream_pointer: POINTER
effective function
Some Back-end-dependent pointer (FILE* in C, InputStream or OutputStream in Java)
has_stream_pointer: BOOLEAN
effective function
True if that stream can be associated to some Back-end-meaningful stream pointer.
filtered_descriptor: INTEGER_32
deferred function
Find the descriptor of the terminal stream...
filtered_has_descriptor: BOOLEAN
deferred function
True if the underlying terminal stream has a descriptor
filtered_stream_pointer: POINTER
deferred function
Find the pointer of the terminal stream...
filtered_has_stream_pointer: BOOLEAN
deferred function
True if the underlying terminal stream has a pointer
recycle
effective procedure
Do whatever needs to be done to free resources or recycle other objects when recycling this one
sequencer_descriptor (file: POINTER): INTEGER_32
can_read_character: BOOLEAN
deferred function
Note that this state is usually temporary.
can_read_line: BOOLEAN
deferred function
can_unread_character: BOOLEAN
deferred function
valid_last_character: BOOLEAN
deferred function
end_of_input: BOOLEAN
deferred function
end_of_input means the previous attempt in character reading failed because the end has been reached.
is_filtered: BOOLEAN
deferred function
skip_separators
effective procedure
Skip all separators (see is_separator of class CHARACTER) and make the first non-separator available in last_character.
skip_separators_using (separators: STRING)
effective procedure
Same job as skip_separators using the separators set.
skip_remainder_of_line
effective procedure
Skip all the remainder of the line including the end of line delimiter itself.
read_integer
effective procedure
Read an integer according to the Eiffel syntax.
last_integer: INTEGER_32
writable attribute
Last integer read using read_integer.
valid_last_integer: BOOLEAN
writable attribute
Was the last call to read_integer successful ?
last_real: REAL_64
writable attribute
Last real read with read_real.
valid_last_real: BOOLEAN
writable attribute
Was the last call to read_real successful ?
read_real
effective procedure
Read a REAL and make the result available in last_real.
last_string: STRING
once function
Access to the unique common buffer to get for example the result computed by read_line, read_word, newline, etc.
read_line
effective procedure
Read a complete line ended by '%N' or end_of_input.%
read_available (limit: INTEGER_32)
effective procedure
Read as many characters as possible, as long as the stream does not block and up to the given limit.
read_word
effective procedure
Read a word using is_separator of class CHARACTER.
newline
effective procedure
Consume input until newline ('%N') is found.
reach_and_skip (keyword: STRING)
effective procedure
Try to skip enough characters in order to reach the keyword which is skipped too.
read_word_using (separators: STRING)
effective procedure
Same job as read_word using separators.
read_tail_in (str: STRING)
effective procedure
Read all remaining character of the stream in str.
io_getc (stream: POINTER): INTEGER_32
io_fread (buf: NATIVE_ARRAY[CHARACTER], size: INTEGER_32, stream: POINTER): INTEGER_32
return size read or 0 if end of input (-1 on error => exception ?)
set_filter (a_filter: FILTER)
effective procedure
Used by the filter itself to get attached