rt/core: impl os::getcwd() in rust ref rust-lang#4812

Author: olsonjeffery

src/libcore/os.rs

@@ -68,10 +68,17 @@ pub mod rustrt {
 }
 
 pub const TMPBUF_SZ : uint = 1000u;
+const BUF_BYTES : uint = 2048u;
 
 pub fn getcwd() -> Path {
+    let buf = [0 as libc::c_char, ..BUF_BYTES];
     unsafe {
-        Path(rustrt::rust_getcwd())
+        if(0 as *libc::c_char == libc::getcwd(
+            &buf[0],
+            BUF_BYTES as libc::size_t)) {
+            fail!();
+        }
+        Path(str::raw::from_c_str(&buf[0]))
     }
 }
 

src/rt/rust_builtin.cpp

@@ -52,25 +52,6 @@ timegm(struct tm *tm)
 }
 #endif
 
-extern "C" CDECL rust_str *
-rust_getcwd() {
-    rust_task *task = rust_get_current_task();
-    LOG(task, task, "rust_getcwd()");
-
-    char cbuf[BUF_BYTES];
-
-#if defined(__WIN32__)
-    if (!_getcwd(cbuf, sizeof(cbuf))) {
-#else
-        if (!getcwd(cbuf, sizeof(cbuf))) {
-#endif
-        task->fail();
-        return NULL;
-    }
-
-    return make_str(task->kernel, cbuf, strlen(cbuf), "rust_str(getcwd)");
-}
-
 #if defined(__WIN32__)
 extern "C" CDECL rust_vec_box *
 rust_env_pairs() {

src/rt/rustrt.def.in

@@ -29,7 +29,6 @@ rust_new_task_in_sched
 rust_num_threads
 rust_path_is_dir
 rust_path_exists
-rust_getcwd
 rust_get_stdin
 rust_get_stdout
 rust_get_stderr
@@ -43,7 +42,6 @@ rust_sched_current_nonlazy_threads
 rust_sched_threads
 rust_set_exit_status
 rust_start
-rust_getcwd
 rust_env_pairs
 rust_task_yield
 rust_task_is_unwinding