diff --git a/tools/generate_interfaces/generate_interfaces.cpp b/tools/generate_interfaces/generate_interfaces.cpp
index b06e676b..6c2ae723 100644
--- a/tools/generate_interfaces/generate_interfaces.cpp
+++ b/tools/generate_interfaces/generate_interfaces.cpp
@@ -1,16 +1,14 @@
 #include <regex>
 #include <string>
 #include <fstream>
-#include <streambuf>
 #include <iostream>
 #include <filesystem>
 
 // these are defined in dll.cpp at the top like this:
 // static char old_xxx[128] = ...
-
 const static std::vector<std::string> interface_patterns = {
     R"(SteamClient\d+)",
-    
+
     R"(SteamGameServerStats\d+)",
     R"(SteamGameServer\d+)",
 
@@ -27,10 +25,10 @@ const static std::vector<std::string> interface_patterns = {
     R"(STEAMSCREENSHOTS_INTERFACE_VERSION\d+)",
     R"(STEAMHTTP_INTERFACE_VERSION\d+)",
     R"(STEAMUNIFIEDMESSAGES_INTERFACE_VERSION\d+)",
-    
-    R"(STEAMCONTROLLER_INTERFACE_VERSION\d+)",
+
+    R"(STEAMCONTROLLER_INTERFACE_VERSION)",
     R"(SteamController\d+)",
-    
+
     R"(STEAMUGC_INTERFACE_VERSION\d+)",
     R"(STEAMAPPLIST_INTERFACE_VERSION\d+)",
     R"(STEAMMUSIC_INTERFACE_VERSION\d+)",
@@ -47,56 +45,64 @@ unsigned int findinterface(
     const std::string &interface_patt)
 {
     std::regex interface_regex(interface_patt);
-    auto begin = std::sregex_iterator(file_contents.begin(), file_contents.end(), interface_regex);
+
+    auto begin = std::sregex_iterator(file_contents.cbegin(), file_contents.cend(), interface_regex);
     auto end = std::sregex_iterator();
 
     unsigned int matches = 0;
-    for (std::sregex_iterator i = begin; i != end; ++i) {
-        std::smatch match = *i;
-        std::string match_str = match.str();
-        out_file << match_str << std::endl;
+
+    for (std::sregex_iterator i = begin; i != end; ++i)
+    {
+        out_file << i->str() << std::endl;
         ++matches;
     }
 
     return matches;
 }
 
-int main (int argc, char *argv[])
+int main(int argc, char *argv[])
 {
-    if (argc < 2) {
+    if (argc < 2)
+    {
         std::cerr << "usage: " << argv[0] << " <path to steam_api .dll or .so>" << std::endl;
         return 1;
     }
 
     std::ifstream steam_api_file(std::filesystem::u8path(argv[1]), std::ios::binary);
-    if (!steam_api_file.is_open()) {
-        std::cerr << "Error opening file" << std::endl;
+    if (!steam_api_file)
+    {
+        std::cerr << "Error opening file: " << argv[1] << std::endl;
         return 1;
     }
 
-    std::string steam_api_contents(
-        (std::istreambuf_iterator<char>(steam_api_file)),
-        std::istreambuf_iterator<char>());
+    std::string steam_api_contents((std::istreambuf_iterator<char>(steam_api_file)), std::istreambuf_iterator<char>());
+
     steam_api_file.close();
 
-    if (steam_api_contents.size() == 0) {
+    if (steam_api_contents.empty())
+    {
         std::cerr << "Error loading data" << std::endl;
         return 1;
     }
 
-    unsigned int total_matches = 0;
-    std::ofstream out_file(std::filesystem::u8path("steam_interfaces.txt"));
-    if (!out_file.is_open()) {
+    std::ofstream out_file("steam_interfaces.txt");
+    if (!out_file)
+    {
         std::cerr << "Error opening output file" << std::endl;
         return 1;
     }
 
-    for (const auto &patt : interface_patterns) {
+    unsigned int total_matches = 0;
+
+    for (const auto &patt : interface_patterns)
+    {
         total_matches += findinterface(out_file, steam_api_contents, patt);
     }
+
     out_file.close();
 
-    if (total_matches == 0) {
+    if (total_matches == 0)
+    {
         std::cerr << "No interfaces were found" << std::endl;
         return 1;
     }