From ee39338225ed30e47bf066f29d239f0aa09efa8c Mon Sep 17 00:00:00 2001
From: Egor Tensin <Egor.Tensin@gmail.com>
Date: Thu, 19 May 2016 02:25:09 +0300
Subject: libservice: fix compiler warnings

---
 utils/libservice/src/device.cpp | 16 +++++++++++++---
 1 file changed, 13 insertions(+), 3 deletions(-)

(limited to 'utils/libservice/src/device.cpp')

diff --git a/utils/libservice/src/device.cpp b/utils/libservice/src/device.cpp
index 4ae25a5..825c2bc 100644
--- a/utils/libservice/src/device.cpp
+++ b/utils/libservice/src/device.cpp
@@ -12,6 +12,8 @@
 
 #include <cstddef>
 
+#include <limits>
+#include <stdexcept>
 #include <string>
 #include <system_error>
 #include <utility>
@@ -54,11 +56,14 @@ namespace libservice
     {
         DWORD nbreq;
 
+        if (in_buf_size > std::numeric_limits<DWORD>::max())
+            throw std::range_error("input buffer size is too large");
+
         std::size_t nbwritten = DeviceIoControl(
             handle,
             code,
             const_cast<void*>(in_buf),
-            in_buf_size,
+            static_cast<DWORD>(in_buf_size),
             NULL,
             0,
             &nbreq,
@@ -91,13 +96,18 @@ namespace libservice
     {
         DWORD nbreq;
 
+        if (in_buf_size > std::numeric_limits<DWORD>::max())
+            throw std::range_error("input buffer size is too large");
+        if (out_buf_size > std::numeric_limits<DWORD>::max())
+            throw std::range_error("output buffer size is too large");
+
         std::size_t nbwritten = DeviceIoControl(
             handle,
             code,
             const_cast<void*>(in_buf),
-            in_buf_size,
+            static_cast<DWORD>(in_buf_size),
             out_buf,
-            out_buf_size,
+            static_cast<DWORD>(out_buf_size),
             &nbreq,
             NULL);
 
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