James H has implemented a new `Tricky' difficulty level in Light Up:

a non-recursive level above Easy, which therefore moves the
recursive Hard mode further up still. Play-testing suggests that in
fact Tricky is often _harder_ than the old Hard mode, since the
latter had limited depth of recursion and would therefore spot
complex deductions only if it happened to start a recursion on the
right square; Tricky may be limited in the sophistication of its
complex deductions, but it never misses one, so its puzzles tend to
be hard all over.

Also in this checkin, a new source file `nullfe.c', containing all
the annoying stub functions required to make command-line solvers
link successfully. James wrote this for (the new) lightupsolver, and
I've used it to simplify the other stand-alone solvers.

[originally from svn r6254]

1 files changed, 49 insertions, 0 deletions

diff --git a/nullfe.c b/nullfe.c
new file mode 100644
index 0000000..4a31ab8
--- /dev/null
+++ b/nullfe.c
@@ -0,0 +1,49 @@
+/*
+ * nullfe.c: Null front-end code containing a bunch of boring stub
+ * functions. Used to ensure successful linking when building the
+ * various stand-alone solver binaries.
+ */
+
+#include <stdarg.h>
+
+#include "puzzles.h"
+
+void frontend_default_colour(frontend *fe, float *output) {}
+void draw_text(drawing *dr, int x, int y, int fonttype, int fontsize,
+               int align, int colour, char *text) {}
+void draw_rect(drawing *dr, int x, int y, int w, int h, int colour) {}
+void draw_line(drawing *dr, int x1, int y1, int x2, int y2, int colour) {}
+void draw_polygon(drawing *dr, int *coords, int npoints,
+                  int fillcolour, int outlinecolour) {}
+void draw_circle(drawing *dr, int cx, int cy, int radius,
+                 int fillcolour, int outlinecolour) {}
+void clip(drawing *dr, int x, int y, int w, int h) {}
+void unclip(drawing *dr) {}
+void start_draw(drawing *dr) {}
+void draw_update(drawing *dr, int x, int y, int w, int h) {}
+void end_draw(drawing *dr) {}
+blitter *blitter_new(drawing *dr, int w, int h) {return NULL;}
+void blitter_free(drawing *dr, blitter *bl) {}
+void blitter_save(drawing *dr, blitter *bl, int x, int y) {}
+void blitter_load(drawing *dr, blitter *bl, int x, int y) {}
+int print_mono_colour(drawing *dr, int grey) { return 0; }
+int print_rgb_colour(drawing *dr, int hatch, float r, float g, float b)
+{ return 0; }
+void print_line_width(drawing *dr, int width) {}
+void midend_supersede_game_desc(midend *me, char *desc, char *privdesc) {}
+void status_bar(drawing *dr, char *text) {}
+
+void fatal(char *fmt, ...)
+{
+    va_list ap;
+
+    fprintf(stderr, "fatal error: ");
+
+    va_start(ap, fmt);
+    vfprintf(stderr, fmt, ap);
+    va_end(ap);
+
+    fprintf(stderr, "\n");
+    exit(1);
+}
+