Implemented TerminalAccess.isTerminal() and Terminal.getTerminalSize() on windows.

src/main/cpp/win.cpp

@@ -0,0 +1,73 @@
+#ifdef WIN32
+
+#include "native.h"
+#include "generic.h"
+#include <windows.h>
+
+/*
+ * Marks the given result as failed, using the current value of GetLastError()
+ */
+void mark_failed_with_errno(JNIEnv *env, const char* message, jobject result) {
+    mark_failed_with_code(env, message, GetLastError(), result);
+}
+
+/*
+ * Process functions
+ */
+
+JNIEXPORT jint JNICALL
+Java_net_rubygrapefruit_platform_internal_PosixProcessFunctions_getPid(JNIEnv *env, jclass target) {
+    return GetCurrentProcessId();
+}
+
+/*
+ * Console functions
+ */
+
+HANDLE getHandle(JNIEnv *env, int output, jobject result) {
+    HANDLE handle = output == 1 ? GetStdHandle(STD_OUTPUT_HANDLE) : GetStdHandle(STD_ERROR_HANDLE);
+    if (handle == INVALID_HANDLE_VALUE) {
+        mark_failed_with_errno(env, "could not get console handle", result);
+        return NULL;
+    }
+    return handle;
+}
+
+JNIEXPORT jboolean JNICALL
+Java_net_rubygrapefruit_platform_internal_WindowsConsoleFunctions_isConsole(JNIEnv *env, jclass target, jint output, jobject result) {
+    CONSOLE_SCREEN_BUFFER_INFO console_info;
+    HANDLE handle = getHandle(env, output, result);
+    if (handle == NULL) {
+        return JNI_FALSE;
+    }
+    if (!GetConsoleScreenBufferInfo(handle, &console_info)) {
+        if (GetLastError() == ERROR_INVALID_HANDLE) {
+            return JNI_FALSE;
+        }
+        mark_failed_with_errno(env, "could not get console buffer", result);
+        return JNI_FALSE;
+    }
+    return JNI_TRUE;
+}
+
+JNIEXPORT void JNICALL
+Java_net_rubygrapefruit_platform_internal_WindowsConsoleFunctions_getConsoleSize (JNIEnv *env, jclass target, jint output, jobject dimension, jobject result) {
+    CONSOLE_SCREEN_BUFFER_INFO console_info;
+    HANDLE handle = getHandle(env, output, result);
+    if (handle == NULL) {
+        mark_failed_with_message(env, "not a terminal", result);
+        return;
+    }
+    if (!GetConsoleScreenBufferInfo(handle, &console_info)) {
+        mark_failed_with_errno(env, "could not get console buffer", result);
+        return;
+    }
+
+    jclass dimensionClass = env->GetObjectClass(dimension);
+    jfieldID widthField = env->GetFieldID(dimensionClass, "cols", "I");
+    env->SetIntField(dimension, widthField, console_info.srWindow.Right - console_info.srWindow.Left + 1);
+    jfieldID heightField = env->GetFieldID(dimensionClass, "rows", "I");
+    env->SetIntField(dimension, heightField, console_info.srWindow.Bottom - console_info.srWindow.Top + 1);
+}
+
+#endif