libservice: fix compiler warnings

2 files changed, 14 insertions, 3 deletions

diff --git a/utils/libservice/CMakeLists.txt b/utils/libservice/CMakeLists.txt
index 720a44b..34b3d13 100644
--- a/utils/libservice/CMakeLists.txt
+++ b/utils/libservice/CMakeLists.txt
@@ -4,6 +4,7 @@ add_library(libservice
     ${libservice_sources}
     ${libservice_headers})
 target_include_directories(libservice PUBLIC include)
+target_compile_definitions(libservice PRIVATE NOMINMAX)
 
 add_subdirectory(test)
 add_subdirectory(utils)
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);