+/**
+ * GARGLK:
+ *
+ * To test at compile time whether the Gargoyle extensions are available, you
+ * can perform a preprocessor test for the existence of %GARGLK. If this
+ * macro is defined, then so are all the Gargoyle extensions. If not, not.
+ *
+ * <note><title>Chimara</title><para>
+ * Currently, in Chimara, the functions are defined, but a few of them
+ * (garglk_unput_string() and garglk_unput_string_uni()) are not implemented.
+ * You can call them, but they will have no effect except to print a warning
+ * to the console.
+ * </para></note>
+ */
+#define GARGLK 1
+
+extern char* garglk_fileref_get_name(frefid_t fref);
+
+extern void garglk_set_program_name(const char *name);
+extern void garglk_set_program_info(const char *info);
+extern void garglk_set_story_name(const char *name);
+extern void garglk_set_story_title(const char *title);
+/*
+ This function is not implemented even in Gargoyle. Looks like it was planned,
+ but never added.
+extern void garglk_set_config(const char *name);
+*/
+
+/* garglk_unput_string - removes the specified string from the end of the output buffer, if
+ * indeed it is there. */
+extern void garglk_unput_string(char *str);
+extern void garglk_unput_string_uni(glui32 *str);
+
+/**
+ * zcolor_Transparent:
+ *
+ * Z-machine color constant representing no color, i.e. transparency.
+ *
+ * <warning><para>Passing this constant to garglk_set_zcolors() or
+ * garglk_set_zcolors_stream() is not currently implemented.</para></warning>
+ */
+#define zcolor_Transparent (-4)
+/**
+ * zcolor_Cursor:
+ *
+ * Z-machine color constant representing the color at the current position of
+ * the cursor.
+ *
+ * <warning><para>Passing this constant to garglk_set_zcolors() or
+ * garglk_set_zcolors_stream() is not currently implemented.</para></warning>
+ */
+#define zcolor_Cursor (-3)
+/**
+ * zcolor_Current:
+ *
+ * Z-machine color constant representing the current color.
+ */
+#define zcolor_Current (-2)
+/**
+ * zcolor_Default:
+ *
+ * Z-machine color constant representing the default color.
+ */
+#define zcolor_Default (-1)
+
+extern void garglk_set_zcolors(glui32 fg, glui32 bg);
+extern void garglk_set_zcolors_stream(strid_t str, glui32 fg, glui32 bg);