93 lines
2.8 KiB
Rust
93 lines
2.8 KiB
Rust
// Copyright 2012 The Rust Project Developers. See the COPYRIGHT
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// file at the top-level directory of this distribution and at
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// http://rust-lang.org/COPYRIGHT.
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//
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// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
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// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
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// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
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// option. This file may not be copied, modified, or distributed
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// except according to those terms.
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// FIXME #3921. This is unsafe because linenoise uses global mutable
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// state without mutexes.
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use std::libc::{c_char, c_int};
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use std::local_data;
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use std::str;
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pub mod rustrt {
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use std::libc::{c_char, c_int};
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extern {
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pub unsafe fn linenoise(prompt: *c_char) -> *c_char;
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pub unsafe fn linenoiseHistoryAdd(line: *c_char) -> c_int;
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pub unsafe fn linenoiseHistorySetMaxLen(len: c_int) -> c_int;
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pub unsafe fn linenoiseHistorySave(file: *c_char) -> c_int;
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pub unsafe fn linenoiseHistoryLoad(file: *c_char) -> c_int;
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pub unsafe fn linenoiseSetCompletionCallback(callback: *u8);
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pub unsafe fn linenoiseAddCompletion(completions: *(), line: *c_char);
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}
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}
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/// Add a line to history
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pub unsafe fn add_history(line: &str) -> bool {
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do line.as_c_str |buf| {
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rustrt::linenoiseHistoryAdd(buf) == 1 as c_int
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}
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}
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/// Set the maximum amount of lines stored
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pub unsafe fn set_history_max_len(len: int) -> bool {
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rustrt::linenoiseHistorySetMaxLen(len as c_int) == 1 as c_int
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}
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/// Save line history to a file
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pub unsafe fn save_history(file: &str) -> bool {
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do file.as_c_str |buf| {
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rustrt::linenoiseHistorySave(buf) == 1 as c_int
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}
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}
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/// Load line history from a file
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pub unsafe fn load_history(file: &str) -> bool {
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do file.as_c_str |buf| {
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rustrt::linenoiseHistoryLoad(buf) == 1 as c_int
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}
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}
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/// Print out a prompt and then wait for input and return it
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pub unsafe fn read(prompt: &str) -> Option<~str> {
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do prompt.as_c_str |buf| {
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let line = rustrt::linenoise(buf);
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if line.is_null() { None }
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else { Some(str::raw::from_c_str(line)) }
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}
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}
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pub type CompletionCb = @fn(~str, @fn(~str));
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static complete_key: local_data::Key<@CompletionCb> = &local_data::Key;
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/// Bind to the main completion callback
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pub unsafe fn complete(cb: CompletionCb) {
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local_data::set(complete_key, @cb);
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extern fn callback(line: *c_char, completions: *()) {
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do local_data::get(complete_key) |cb| {
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let cb = **cb.unwrap();
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unsafe {
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do cb(str::raw::from_c_str(line)) |suggestion| {
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do suggestion.as_c_str |buf| {
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rustrt::linenoiseAddCompletion(completions, buf);
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}
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}
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}
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}
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}
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rustrt::linenoiseSetCompletionCallback(callback);
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}
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