cstr-argument

一个将函数参数转换为空终止字符串的特质

文档

用法

将其添加到您的 Cargo.toml

[dependencies]
cstr-argument = "0.0.2"

并将其添加到您的 crate 根目录

extern crate cstr_argument;

示例

use std::os::raw::c_char;
use cstr_argument::CStrArgument;

extern "C" {
  fn foo(s: *const c_char);
}

fn bar<S: CStrArgument>(s: S) {
  let s = s.into_cstr();
  unsafe {
    foo(s.as_ref().as_ptr())
  }
}

fn baz() {
  bar("hello "); // Argument will be converted to a CString requiring an allocation
  bar("world\0"); // Argument will be converted to a CStr without allocation
  bar("!".to_owned()); // Argument will be converted to a CString possibly requiring an allocation
}