d4a2c94180
This commit cleans out a large amount of deprecated APIs from the standard library and some of the facade crates as well, updating all users in the compiler and in tests as it goes along.
68 lines
2.2 KiB
Rust
68 lines
2.2 KiB
Rust
// Copyright 2013 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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// pretty-expanded FIXME #23616
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#![feature(libc, std_misc)]
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extern crate libc;
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use std::ffi::{CStr, CString};
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use libc::{c_char, c_int};
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extern {
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fn sprintf(s: *mut c_char, format: *const c_char, ...) -> c_int;
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}
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unsafe fn check<T, F>(expected: &str, f: F) where F: FnOnce(*mut c_char) -> T {
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let mut x = [0 as c_char; 50];
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f(&mut x[0] as *mut c_char);
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assert_eq!(expected.as_bytes(), CStr::from_ptr(x.as_ptr()).to_bytes());
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}
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pub fn main() {
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unsafe {
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// Call with just the named parameter
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let c = CString::new(&b"Hello World\n"[..]).unwrap();
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check("Hello World\n", |s| sprintf(s, c.as_ptr()));
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// Call with variable number of arguments
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let c = CString::new(&b"%d %f %c %s\n"[..]).unwrap();
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check("42 42.500000 a %d %f %c %s\n\n", |s| {
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sprintf(s, c.as_ptr(), 42, 42.5f64, 'a' as c_int, c.as_ptr());
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});
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// Make a function pointer
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let x: unsafe extern fn(*mut c_char, *const c_char, ...) -> c_int = sprintf;
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// A function that takes a function pointer
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unsafe fn call(p: unsafe extern fn(*mut c_char, *const c_char, ...) -> c_int) {
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// Call with just the named parameter
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let c = CString::new(&b"Hello World\n"[..]).unwrap();
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check("Hello World\n", |s| sprintf(s, c.as_ptr()));
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// Call with variable number of arguments
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let c = CString::new(&b"%d %f %c %s\n"[..]).unwrap();
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check("42 42.500000 a %d %f %c %s\n\n", |s| {
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sprintf(s, c.as_ptr(), 42, 42.5f64, 'a' as c_int, c.as_ptr());
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});
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}
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// Pass sprintf directly
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call(sprintf);
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// Pass sprintf indirectly
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call(x);
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}
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}
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