From bcc104ce79f153cd853920ff924e13f84793b61c Mon Sep 17 00:00:00 2001
From: Lindsey Kuper <lkuper@mozilla.com>
Date: Thu, 24 Mar 2011 18:20:49 -0700
Subject: A first stab at the 'nbody' demo, with support for calling C sqrt().

---
 src/rt/rust_builtin.cpp | 5 +++++
 src/rt/rust_internal.h  | 1 +
 src/rt/rustrt.def.in    | 2 ++
 3 files changed, 8 insertions(+)

(limited to 'src/rt')

diff --git a/src/rt/rust_builtin.cpp b/src/rt/rust_builtin.cpp
index 98333774..2de9d7f4 100644
--- a/src/rt/rust_builtin.cpp
+++ b/src/rt/rust_builtin.cpp
@@ -51,6 +51,11 @@ last_os_error(rust_task *task) {
     return st;
 }
 
+extern "C" CDECL
+void squareroot(rust_task *task, double *input, double *output) {
+    *output = sqrt(*input);
+}
+
 extern "C" CDECL size_t
 size_of(rust_task *task, type_desc *t) {
   return t->size;
diff --git a/src/rt/rust_internal.h b/src/rt/rust_internal.h
index 5bd62d2b..a1cc8e51 100644
--- a/src/rt/rust_internal.h
+++ b/src/rt/rust_internal.h
@@ -16,6 +16,7 @@
 #include <stdio.h>
 #include <string.h>
 #include <fcntl.h>
+#include <math.h>
 
 #include "rust.h"
 #include "rand.h"
diff --git a/src/rt/rustrt.def.in b/src/rt/rustrt.def.in
index f8ac1ed4..df9e26af 100644
--- a/src/rt/rustrt.def.in
+++ b/src/rt/rustrt.def.in
@@ -20,6 +20,7 @@ rust_get_stdout
 rust_run_program
 rust_start
 size_of
+squareroot
 str_alloc
 str_buf
 str_byte_len
@@ -39,6 +40,7 @@ upcall_get_type_desc
 upcall_grow_task
 upcall_join
 upcall_kill
+upcall_log_double
 upcall_log_int
 upcall_log_str
 upcall_malloc
-- 
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