auto merge of #9235 : olsonjeffery/rust/newrt_file_io_1, r=thestinger

A quick rundown:

- added `file::{readdir, stat, mkdir, rmdir}`
- Added access-constrained versions of `FileStream`; `FileReader` and `FileWriter` respectively
- big rework in `uv::file` .. most actions are by-val-self methods on `FsRequest`; `FileDescriptor` has gone the way of the dinosaurs
- playing nice w/ homing IO (I just copied ecr's work, hehe), etc
- added `FileInfo` trait, with an impl for `Path`
  - wrapper for file-specific actions, with the file path always implied by self's value
  - has the means to create `FileReader` & `FileWriter` (this isn't exposed in the top-level free function API)
  - has "safe" wrappers for `stat()` that won't throw in the event of non-existence/error (in this case, I mean `is_file` and `exists`)
  - actions should fail if done on non-regular-files, as appropriate
- added `DirectoryInfo` trait, with an impl for `Path`
  - pretty much ditto above, but for directories
  - added `readdir` (!!) to iterate over entries in a dir as a `~[Path]` (this was *brutal* to get working)

...<del>and lots of other stuff</del>not really. Do your worst!

2 files changed, 58 insertions, 0 deletions

diff --git a/src/rt/rust_uv.cpp b/src/rt/rust_uv.cpp
index bfdf0e67a9b..9b460cffd74 100644
--- a/src/rt/rust_uv.cpp
+++ b/src/rt/rust_uv.cpp
@@ -542,6 +542,10 @@ extern "C" int
 rust_uv_get_result_from_fs_req(uv_fs_t* req) {
   return req->result;
 }
+extern "C" void*
+rust_uv_get_ptr_from_fs_req(uv_fs_t* req) {
+  return req->ptr;
+}
 extern "C" uv_loop_t*
 rust_uv_get_loop_from_fs_req(uv_fs_t* req) {
   return req->loop;
@@ -551,3 +555,50 @@ extern "C" uv_loop_t*
 rust_uv_get_loop_from_getaddrinfo_req(uv_getaddrinfo_t* req) {
   return req->loop;
 }
+
+extern "C" int
+rust_uv_fs_stat(uv_loop_t* loop, uv_fs_t* req, const char* path, uv_fs_cb cb) {
+  return uv_fs_stat(loop, req, path, cb);
+}
+extern "C" int
+rust_uv_fs_fstat(uv_loop_t* loop, uv_fs_t* req, uv_file file, uv_fs_cb cb) {
+  return uv_fs_fstat(loop, req, file, cb);
+}
+
+extern "C" void
+rust_uv_populate_uv_stat(uv_fs_t* req_in, uv_stat_t* stat_out) {
+  stat_out->st_dev = req_in->statbuf.st_dev;
+  stat_out->st_mode = req_in->statbuf.st_mode;
+  stat_out->st_nlink = req_in->statbuf.st_nlink;
+  stat_out->st_uid = req_in->statbuf.st_uid;
+  stat_out->st_gid = req_in->statbuf.st_gid;
+  stat_out->st_rdev = req_in->statbuf.st_rdev;
+  stat_out->st_ino = req_in->statbuf.st_ino;
+  stat_out->st_size = req_in->statbuf.st_size;
+  stat_out->st_blksize = req_in->statbuf.st_blksize;
+  stat_out->st_blocks = req_in->statbuf.st_blocks;
+  stat_out->st_flags = req_in->statbuf.st_flags;
+  stat_out->st_gen = req_in->statbuf.st_gen;
+  stat_out->st_atim.tv_sec = req_in->statbuf.st_atim.tv_sec;
+  stat_out->st_atim.tv_nsec = req_in->statbuf.st_atim.tv_nsec;
+  stat_out->st_mtim.tv_sec = req_in->statbuf.st_mtim.tv_sec;
+  stat_out->st_mtim.tv_nsec = req_in->statbuf.st_mtim.tv_nsec;
+  stat_out->st_ctim.tv_sec = req_in->statbuf.st_ctim.tv_sec;
+  stat_out->st_ctim.tv_nsec = req_in->statbuf.st_ctim.tv_nsec;
+  stat_out->st_birthtim.tv_sec = req_in->statbuf.st_birthtim.tv_sec;
+  stat_out->st_birthtim.tv_nsec = req_in->statbuf.st_birthtim.tv_nsec;
+}
+
+extern "C" int
+rust_uv_fs_mkdir(uv_loop_t* loop, uv_fs_t* req, const char* path, int mode, uv_fs_cb cb) {
+  return uv_fs_mkdir(loop, req, path, mode, cb);
+}
+extern "C" int
+rust_uv_fs_rmdir(uv_loop_t* loop, uv_fs_t* req, const char* path, uv_fs_cb cb) {
+  return uv_fs_rmdir(loop, req, path, cb);
+}
+
+extern "C" int
+rust_uv_fs_readdir(uv_loop_t* loop, uv_fs_t* req, const char* path, int flags, uv_fs_cb cb) {
+  return uv_fs_readdir(loop, req, path, flags, cb);
+}
diff --git a/src/rt/rustrt.def.in b/src/rt/rustrt.def.in
index 4cbee0dcbd0..3be958837dc 100644
--- a/src/rt/rustrt.def.in
+++ b/src/rt/rustrt.def.in
@@ -113,8 +113,15 @@ rust_uv_fs_write
 rust_uv_fs_read
 rust_uv_fs_close
 rust_uv_get_result_from_fs_req
+rust_uv_get_ptr_from_fs_req
 rust_uv_get_loop_from_fs_req
+rust_uv_fs_stat
+rust_uv_fs_fstat
 rust_uv_fs_req_cleanup
+rust_uv_populate_uv_stat
+rust_uv_fs_mkdir
+rust_uv_fs_rmdir
+rust_uv_fs_readdir
 rust_dbg_lock_create
 rust_dbg_lock_destroy
 rust_dbg_lock_lock