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// Copyright 2013-2014 The Rust Project Developers. See the COPYRIGHT
// file at the top-level directory of this distribution and at
// http://rust-lang.org/COPYRIGHT.
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! A wrapper around LLVM's archive (.a) code
use ArchiveRef;
use std::ffi::CString;
use std::path::Path;
use std::slice;
use std::str;
pub struct ArchiveRO { ptr: ArchiveRef }
pub struct Iter<'a> {
archive: &'a ArchiveRO,
ptr: ::ArchiveIteratorRef,
}
pub struct Child<'a> {
name: Option<&'a str>,
data: &'a [u8],
}
impl ArchiveRO {
/// Opens a static archive for read-only purposes. This is more optimized
/// than the `open` method because it uses LLVM's internal `Archive` class
/// rather than shelling out to `ar` for everything.
///
/// If this archive is used with a mutable method, then an error will be
/// raised.
pub fn open(dst: &Path) -> Option<ArchiveRO> {
return unsafe {
let s = path2cstr(dst);
let ar = ::LLVMRustOpenArchive(s.as_ptr());
if ar.is_null() {
None
} else {
Some(ArchiveRO { ptr: ar })
}
};
#[cfg(unix)]
fn path2cstr(p: &Path) -> CString {
use std::os::unix::prelude::*;
use std::ffi::OsStr;
let p: &OsStr = p.as_ref();
CString::new(p.as_bytes()).unwrap()
}
#[cfg(windows)]
fn path2cstr(p: &Path) -> CString {
CString::new(p.to_str().unwrap()).unwrap()
}
}
pub fn iter(&self) -> Iter {
unsafe {
Iter { ptr: ::LLVMRustArchiveIteratorNew(self.ptr), archive: self }
}
}
}
impl Drop for ArchiveRO {
fn drop(&mut self) {
unsafe {
::LLVMRustDestroyArchive(self.ptr);
}
}
}
impl<'a> Iterator for Iter<'a> {
type Item = Child<'a>;
fn next(&mut self) -> Option<Child<'a>> {
unsafe {
let ptr = ::LLVMRustArchiveIteratorCurrent(self.ptr);
if ptr.is_null() {
return None
}
let mut name_len = 0;
let name_ptr = ::LLVMRustArchiveChildName(ptr, &mut name_len);
let mut data_len = 0;
let data_ptr = ::LLVMRustArchiveChildData(ptr, &mut data_len);
let child = Child {
name: if name_ptr.is_null() {
None
} else {
let name = slice::from_raw_parts(name_ptr as *const u8,
name_len as usize);
str::from_utf8(name).ok().map(|s| s.trim())
},
data: slice::from_raw_parts(data_ptr as *const u8,
data_len as usize),
};
::LLVMRustArchiveIteratorNext(self.ptr);
Some(child)
}
}
}
impl<'a> Drop for Iter<'a> {
fn drop(&mut self) {
unsafe {
::LLVMRustArchiveIteratorFree(self.ptr);
}
}
}
impl<'a> Child<'a> {
pub fn name(&self) -> Option<&'a str> { self.name }
pub fn data(&self) -> &'a [u8] { self.data }
}
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