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.
78 lines
2.3 KiB
Rust
78 lines
2.3 KiB
Rust
// Copyright 2013-2014 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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//! A wrapper around LLVM's archive (.a) code
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use libc;
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use ArchiveRef;
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use std::ffi::CString;
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use std::slice;
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use std::path::Path;
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pub struct ArchiveRO {
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ptr: ArchiveRef,
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}
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impl ArchiveRO {
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/// Opens a static archive for read-only purposes. This is more optimized
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/// than the `open` method because it uses LLVM's internal `Archive` class
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/// rather than shelling out to `ar` for everything.
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///
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/// If this archive is used with a mutable method, then an error will be
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/// raised.
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pub fn open(dst: &Path) -> Option<ArchiveRO> {
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return unsafe {
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let s = path2cstr(dst);
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let ar = ::LLVMRustOpenArchive(s.as_ptr());
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if ar.is_null() {
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None
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} else {
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Some(ArchiveRO { ptr: ar })
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}
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};
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#[cfg(unix)]
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fn path2cstr(p: &Path) -> CString {
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use std::os::unix::prelude::*;
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use std::ffi::OsStr;
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let p: &OsStr = p.as_ref();
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CString::new(p.as_bytes()).unwrap()
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}
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#[cfg(windows)]
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fn path2cstr(p: &Path) -> CString {
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CString::new(p.to_str().unwrap()).unwrap()
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}
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}
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/// Reads a file in the archive
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pub fn read<'a>(&'a self, file: &str) -> Option<&'a [u8]> {
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unsafe {
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let mut size = 0 as libc::size_t;
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let file = CString::new(file).unwrap();
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let ptr = ::LLVMRustArchiveReadSection(self.ptr, file.as_ptr(),
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&mut size);
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if ptr.is_null() {
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None
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} else {
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Some(slice::from_raw_parts(ptr as *const u8, size as usize))
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}
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}
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}
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}
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impl Drop for ArchiveRO {
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fn drop(&mut self) {
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unsafe {
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::LLVMRustDestroyArchive(self.ptr);
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}
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}
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}
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