From a3ec0b1f643d00b9418e4884bd7caa07bf052201 Mon Sep 17 00:00:00 2001
From: Marijn Haverbeke <marijnh@gmail.com>
Date: Fri, 6 May 2011 22:13:13 +0200
Subject: Rename std modules to be camelcased

(Have fun mergining your stuff with this.)
---
 src/lib/Run_Program.rs | 96 ++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 96 insertions(+)
 create mode 100644 src/lib/Run_Program.rs

(limited to 'src/lib/Run_Program.rs')

diff --git a/src/lib/Run_Program.rs b/src/lib/Run_Program.rs
new file mode 100644
index 00000000..30c0ee9c
--- /dev/null
+++ b/src/lib/Run_Program.rs
@@ -0,0 +1,96 @@
+import Str.sbuf;
+import Vec.vbuf;
+
+native "rust" mod rustrt {
+    fn rust_run_program(vbuf argv, int in_fd, int out_fd, int err_fd) -> int;
+}
+
+fn argvec(str prog, vec[str] args) -> vec[sbuf] {
+    auto argptrs = vec(Str.buf(prog));
+    for (str arg in args) {
+        Vec.push[sbuf](argptrs, Str.buf(arg));
+    }
+    Vec.push[sbuf](argptrs, 0 as sbuf);
+    ret argptrs;
+}
+
+fn run_program(str prog, vec[str] args) -> int {
+    auto pid = rustrt.rust_run_program(Vec.buf[sbuf](argvec(prog, args)),
+                                       0, 0, 0);
+    ret OS.waitpid(pid);
+}
+
+type program =
+    state obj {
+        fn get_id() -> int;
+        fn input() -> IO.writer;
+        fn output() -> IO.reader;
+        fn close_input();
+        fn finish() -> int;
+    };
+
+fn start_program(str prog, vec[str] args) -> @program {
+    auto pipe_input = OS.pipe();
+    auto pipe_output = OS.pipe();
+    auto pid = rustrt.rust_run_program
+        (Vec.buf[sbuf](argvec(prog, args)),
+         pipe_input._0, pipe_output._1, 0);
+    if (pid == -1) {fail;}
+    OS.libc.close(pipe_input._0);
+    OS.libc.close(pipe_output._1);
+
+    state obj new_program(int pid,
+                          int in_fd,
+                          OS.libc.FILE out_file,
+                          mutable bool finished) {
+        fn get_id() -> int {ret pid;}
+        fn input() -> IO.writer {
+            ret IO.new_writer(IO.fd_buf_writer(in_fd, false));
+        }
+        fn output() -> IO.reader {
+            ret IO.new_reader(IO.FILE_buf_reader(out_file, false));
+        }
+        fn close_input() {
+            OS.libc.close(in_fd);
+        }
+        fn finish() -> int {
+            if (finished) {ret 0;}
+            finished = true;
+            OS.libc.close(in_fd);
+            ret OS.waitpid(pid);
+        }
+        drop {
+            if (!finished) {
+                OS.libc.close(in_fd);
+                OS.waitpid(pid);
+            }
+            OS.libc.fclose(out_file);
+        }
+    }
+    ret @new_program(pid, pipe_input._1,
+                     OS.fd_FILE(pipe_output._0),
+                     false);
+}
+
+fn program_output(str prog, vec[str] args)
+    -> rec(int status, str out) {
+    auto pr = start_program(prog, args);
+    pr.close_input();
+    auto out = pr.output();
+    auto buf = "";
+    while (!out.eof()) {
+        auto bytes = out.read_bytes(4096u);
+        buf += Str.unsafe_from_bytes(bytes);
+    }
+    ret rec(status=pr.finish(), out=buf);
+}
+
+
+// Local Variables:
+// mode: rust
+// fill-column: 78;
+// indent-tabs-mode: nil
+// c-basic-offset: 4
+// buffer-file-coding-system: utf-8-unix
+// compile-command: "make -k -C .. 2>&1 | sed -e 's/\\/x\\//x:\\//g'";
+// End:
-- 
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