From 6b46852902eba38672b96436771ffaab4ca6872b Mon Sep 17 00:00:00 2001
From: Danny Robson <danny@nerdcruft.net>
Date: Tue, 20 Oct 2020 06:57:56 +1000
Subject: [PATCH] debug: add is_interactive_console query

---
 CMakeLists.txt         |  2 ++
 debug/system.hpp       |  5 +++++
 debug/system_posix.cpp | 10 ++++++++++
 debug/system_win32.cpp | 14 ++++++++++++++
 4 files changed, 31 insertions(+)
 create mode 100644 debug/system_posix.cpp
 create mode 100644 debug/system_win32.cpp

diff --git a/CMakeLists.txt b/CMakeLists.txt
index f212562a..0bdf74ff 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -124,6 +124,7 @@ if (NOT WIN32)
         memory/system.hpp
         debug_posix.cpp
         debug/crash_posix.cpp
+        debug/system_posix.cpp
         io_posix.cpp
         io_posix.hpp
         library_posix.hpp
@@ -147,6 +148,7 @@ if (WIN32)
         APPEND UTIL_FILES
         debug_win32.cpp
         debug/crash_win32.cpp
+        debug/system_win32.cpp
         exe_win32.cpp
         io_win32.cpp
         io_win32.hpp
diff --git a/debug/system.hpp b/debug/system.hpp
index 1ec872d8..a0204216 100644
--- a/debug/system.hpp
+++ b/debug/system.hpp
@@ -16,4 +16,9 @@ void force_console (void);
 ///////////////////////////////////////////////////////////////////////////////
 namespace cruft::debug {
     void init (void);
+
+
+    /// Return true if the application appears to be running as an
+    /// interactive console application.
+    bool is_interactive_console (void);
 }
diff --git a/debug/system_posix.cpp b/debug/system_posix.cpp
new file mode 100644
index 00000000..a79fbb46
--- /dev/null
+++ b/debug/system_posix.cpp
@@ -0,0 +1,10 @@
+#include "./system.hpp"
+
+#include <unistd.h>
+
+
+bool
+cruft::debug::is_interactive_console (void)
+{
+    return isatty (STDIN_FILENO);
+}
diff --git a/debug/system_win32.cpp b/debug/system_win32.cpp
new file mode 100644
index 00000000..98600f1f
--- /dev/null
+++ b/debug/system_win32.cpp
@@ -0,0 +1,14 @@
+#include "./system.hpp"
+
+#include <cruft/util/win32/windows.hpp>
+
+
+bool cruft::debug::is_interactive_console (void)
+{
+    HWND console_window = GetConsoleWindow ();
+
+    DWORD dwProcessId;
+    GetWindowThreadProcessId (console_window, &dwProcessId);
+
+    return GetCurrentProcessId () == dwProcessId;
+}
\ No newline at end of file