Added error management from pre-3.0 branch.

CMakeLists.txt

@@ -18,6 +18,7 @@ find_package(OpenGL REQUIRED)
 
 set(common_SOURCES 
     ${CMAKE_CURRENT_SOURCE_DIR}/src/enable.c 
+    ${CMAKE_CURRENT_SOURCE_DIR}/src/error.c
     ${CMAKE_CURRENT_SOURCE_DIR}/src/fullscreen.c
     ${CMAKE_CURRENT_SOURCE_DIR}/src/glext.c 
     ${CMAKE_CURRENT_SOURCE_DIR}/src/init.c 

include/GL/glfw.h

@@ -387,6 +387,10 @@ GLFWAPI int  glfwInit(void);
 GLFWAPI void glfwTerminate(void);
 GLFWAPI void glfwGetVersion(int* major, int* minor, int* rev);
 
+/* Error handling */
+GLFWAPI int glfwGetError(void);
+GLFWAPI const char* glfwErrorString(int error);
+
 /* Video mode functions */
 GLFWAPI int  glfwGetVideoModes(GLFWvidmode* list, int maxcount);
 GLFWAPI void glfwGetDesktopMode(GLFWvidmode* mode);

src/error.c

@@ -0,0 +1,105 @@
+//========================================================================
+// GLFW - An OpenGL framework
+// Platform:    All
+// API version: 3.0
+// WWW:         http://www.glfw.org/
+//------------------------------------------------------------------------
+// Copyright (c) 2008-2010 Camilla Berglund <elmindreda@elmindreda.org>
+//
+// This software is provided 'as-is', without any express or implied
+// warranty. In no event will the authors be held liable for any damages
+// arising from the use of this software.
+//
+// Permission is granted to anyone to use this software for any purpose,
+// including commercial applications, and to alter it and redistribute it
+// freely, subject to the following restrictions:
+//
+// 1. The origin of this software must not be misrepresented; you must not
+//    claim that you wrote the original software. If you use this software
+//    in a product, an acknowledgment in the product documentation would
+//    be appreciated but is not required.
+//
+// 2. Altered source versions must be plainly marked as such, and must not
+//    be misrepresented as being the original software.
+//
+// 3. This notice may not be removed or altered from any source
+//    distribution.
+//
+//========================================================================
+
+#include "internal.h"
+
+
+//////////////////////////////////////////////////////////////////////////
+//////                       GLFW internal API                      //////
+//////////////////////////////////////////////////////////////////////////
+
+//========================================================================
+// The current error value
+//========================================================================
+
+static int _glfwError = GLFW_NO_ERROR;
+
+
+//========================================================================
+// Sets the current error value
+//========================================================================
+
+void _glfwSetError(int error)
+{
+  _glfwError = error;
+}
+
+
+//////////////////////////////////////////////////////////////////////////
+//////                        GLFW public API                       //////
+//////////////////////////////////////////////////////////////////////////
+
+//========================================================================
+// Returns the current error value
+//========================================================================
+
+GLFWAPI int glfwGetError(void)
+{
+    int error = _glfwError;
+    _glfwError = GLFW_NO_ERROR;
+    return error;
+}
+
+
+//========================================================================
+// Returns a string representation of the specified error value
+//========================================================================
+
+GLFWAPI const char* glfwErrorString(int error)
+{
+    switch (error)
+    {
+        case GLFW_NO_ERROR:
+            return "No error";
+        case GLFW_NOT_INITIALIZED:
+            return "The GLFW library is not initialized";
+        case GLFW_INVALID_ENUM:
+            return "Invalid argument for enum parameter";
+        case GLFW_INVALID_VALUE:
+            return "Invalid value for parameter";
+        case GLFW_OUT_OF_MEMORY:
+            return "Out of memory";
+        case GLFW_OPENGL_NOT_SUPPORTED:
+            return "OpenGL is not supported";
+        case GLFW_NO_PIXEL_FORMAT:
+            return "No matching framebuffer pixel format could be found";
+        case GLFW_VIDEO_MODE_FAILED:
+            return "Video mode setting failed";
+        case GLFW_UNAVAILABLE_VERSION:
+            return "The requested OpenGL version is unavailable";
+        case GLFW_NO_CURRENT_WINDOW:
+            return "There is no current GLFW window";
+        case GLFW_INTERNAL_ERROR:
+            return "Internal GLFW library error";
+        default:
+            // TODO: Set GLFW_INVALID_ENUM here?
+            return NULL;
+    }
+}
+

src/internal.h

@@ -231,6 +231,9 @@ GLFWGLOBAL _GLFWlibrary _glfwLibrary;
 int _glfwPlatformInit(void);
 int _glfwPlatformTerminate(void);
 
+// Error handling
+void _glfwSetError(int error);
+
 // Enable/Disable
 void _glfwPlatformEnableSystemKeys(_GLFWwindow* window);
 void _glfwPlatformDisableSystemKeys(_GLFWwindow* window);