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Article contents:[[tags: manual]] [[toc:]] == Module (chicken io) This module provides various Input/Output extensions. === read-list <procedure>(read-list [PORT [READER [MAX]]])</procedure> Call {{READER}} up to {{MAX}} times and collect its output in a list. If {{MAX}} is {{#f}}, read until end of file. The reader is called with one argument: {{PORT}}. {{READER}} defaults to {{read}}, {{MAX}} to {{#f}} and {{PORT}} to {{current-input-port}}, so if you call it with no arguments, it will read all remaining s-expressions from the current input port. === read-buffered <procedure>(read-buffered [PORT])</procedure> Reads any remaining data buffered after previous read operations on {{PORT}}. If no remaining data is currently buffered, an empty string is returned. This procedure will never block. Currently only useful for string-, process- and tcp ports. === read-byte === write-byte <procedure>(read-byte [PORT])</procedure><br> <procedure>(write-byte BYTE [PORT])</procedure> Read/write a byte to the port given in {{PORT}}, which default to the values of {{(current-input-port)}} and {{(current-output-port)}}, respectively. === read-line === write-line <procedure>(read-line [PORT [LIMIT]])</procedure><br> <procedure>(write-line STRING [PORT])</procedure> Line-input and -output. {{PORT}} defaults to the value of {{(current-input-port)}} and {{(current-output-port)}}, respectively. If the optional argument {{LIMIT}} is given and not {{#f}}, then {{read-line}} reads at most {{LIMIT}} characters per line. {{read-line}} returns a string without the terminating newline and {{write-line}} adds a terminating newline before outputting. === read-lines <procedure>(read-lines [PORT [MAX]])</procedure> Read {{MAX}} or fewer lines from {{PORT}}. {{MAX}} defaults to {{most-positive-fixnum}} and {{PORT}} defaults to the value of {{(current-input-port)}}. Returns a list of strings, each string representing a line read, not including any line separation character(s). === read-string === read-string! <procedure>(read-string [NUM [PORT]])</procedure><br> <procedure>(read-string! NUM STRING [PORT [START]])</procedure><br> Read or write {{NUM}} characters from/to {{PORT}}, which defaults to the value of {{(current-input-port)}} or {{(current-output-port)}}, respectively. If {{NUM}} is {{#f}} or not given, then all data up to the end-of-file is read, or, in the case of {{write-string}} the whole string is written. If no more input is available, {{read-string}} returns {{#!eof}}. {{read-string!}} reads destructively into the given {{STRING}} argument, but never more characters than would fit into {{STRING}}. If {{START}} is given, then the read characters are stored starting at that position. {{read-string!}} returns the actual number of characters read. === read-bytevector <procedure>(read-bytevector [NUM [PORT]])</procedure> Read {{NUM}} bytes from {{PORT}}, which defaults to the value of {{(current-input-port)}}. {{read-bytevector}} allocates a new buffer and returns it (or the end-of-file object, if at the end of the input file). If {{NUM}} is optional and not given, then all remaining input is read or the whole bytevector is read/written. === read-bytevector! <procedure>(read-bytevector! BYTEVECTOR [PORT START END])</procedure> Read bytes from {{PORT}} into {{BYTEVECTOR}}. {{PORT}} defaults to the value of {{(current-input-port)}} and returns the actual number of bytes read. {{START}} and {{END}} designate the range of bytes that should be filled with input from {{PORT}}. If {{END}} exceeeds the length of {{BYTEVECTOR}} only as much data is read as fits into the destination buffer. === write-bytevector <procedure>(write-bytevector BYTEVECTOR [PORT START END])</procedure> Write bytes from {{BYTEVECTOR}} to {{PORT}}. {{PORT}} defaults to the value of {{(current-output-port)}}. {{START}} and {{END}} designate the range of bytes that should be written. If {{END}} exceeeds the length of {{BYTEVECTOR}} only as much data is written as is available. === read-token <procedure>(read-token PREDICATE [PORT])</procedure> Reads characters from {{PORT}} (which defaults to the value of {{(current-input-port)}}) and calls the procedure {{PREDICATE}} with each character until {{PREDICATE}} returns false. Returns a string with the accumulated characters. --- Previous: [[Module (chicken gc)]] Next: [[Module (chicken irregex)]] Description of your changes:

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