Replace <math.h> with <tgmath.h> throughout

C89 provided only double-precision mathematical functions (sin() etc),
and so despite using single-precision elsewhere, those are what Puzzles
has traditionally used.  C99 introduced single-precision equivalents
(sinf() etc), and I hope it's been long enough that we can safely use
them.  Maybe they'll even be faster.

Rather than directly use the single-precision functions, though, we use
the magic macros from <tgmath.h> that automatically choose the precision
of mathematical functions based on their arguments.  This has the
advantage that we only need to change which header we include, and thus
that we can switch back again if some platform has trouble with the new
header.

55 files changed, 55 insertions, 55 deletions

diff --git a/auxiliary/hat-test.c b/auxiliary/hat-test.c
index e41a53a..4f8dc65 100644
--- a/auxiliary/hat-test.c
+++ b/auxiliary/hat-test.c
@@ -5,7 +5,7 @@
  */
 
 #include <assert.h>
-#include <math.h>
+#include <tgmath.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <string.h>
diff --git a/auxiliary/hatgen.c b/auxiliary/hatgen.c
index d9c6d73..9574cb8 100644
--- a/auxiliary/hatgen.c
+++ b/auxiliary/hatgen.c
@@ -16,7 +16,7 @@
  */
 
 #include <assert.h>
-#include <math.h>
+#include <tgmath.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/blackbox.c b/blackbox.c
index 69959b6..69ec12c 100644
--- a/blackbox.c
+++ b/blackbox.c
@@ -7,7 +7,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/bridges.c b/bridges.c
index 1694039..bd4b3ca 100644
--- a/bridges.c
+++ b/bridges.c
@@ -73,7 +73,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/cmake/testbuild.c b/cmake/testbuild.c
index 67a6879..137af2f 100644
--- a/cmake/testbuild.c
+++ b/cmake/testbuild.c
@@ -5,7 +5,7 @@
 #include <stdarg.h>
 #include <string.h>
 #include <errno.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include <sys/time.h>
 #include <sys/resource.h>
diff --git a/cube.c b/cube.c
index 3b4e975..1261730 100644
--- a/cube.c
+++ b/cube.c
@@ -7,7 +7,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/dominosa.c b/dominosa.c
index 35f6a56..801c1f1 100644
--- a/dominosa.c
+++ b/dominosa.c
@@ -48,7 +48,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/drawing.c b/drawing.c
index 5fb8a31..90f54f3 100644
--- a/drawing.c
+++ b/drawing.c
@@ -27,7 +27,7 @@
 #include <stdlib.h>
 #include <string.h>
 #include <assert.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/fifteen.c b/fifteen.c
index 11e1a7b..53b06aa 100644
--- a/fifteen.c
+++ b/fifteen.c
@@ -8,7 +8,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/filling.c b/filling.c
index 6552d50..87b9d9e 100644
--- a/filling.c
+++ b/filling.c
@@ -58,7 +58,7 @@
 
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 #include <stdarg.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/flip.c b/flip.c
index 7170bb4..1112443 100644
--- a/flip.c
+++ b/flip.c
@@ -9,7 +9,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 #include "tree234.h"
diff --git a/flood.c b/flood.c
index 0ed8f06..da2317a 100644
--- a/flood.c
+++ b/flood.c
@@ -32,7 +32,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/galaxies.c b/galaxies.c
index 10c92d8..e3cc76e 100644
--- a/galaxies.c
+++ b/galaxies.c
@@ -80,7 +80,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/grid.c b/grid.c
index c2e08db..d2a3e13 100644
--- a/grid.c
+++ b/grid.c
@@ -13,7 +13,7 @@
 #include <ctype.h>
 #include <float.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 #include "tree234.h"
diff --git a/gtk.c b/gtk.c
index eab6980..ce792d3 100644
--- a/gtk.c
+++ b/gtk.c
@@ -13,7 +13,7 @@
 #include <stdarg.h>
 #include <string.h>
 #include <errno.h>
-#include <math.h>
+#include <tgmath.h>
 #include <unistd.h>
 
 #include <sys/time.h>
diff --git a/guess.c b/guess.c
index f359a99..55a30e8 100644
--- a/guess.c
+++ b/guess.c
@@ -7,7 +7,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/hat.c b/hat.c
index 0a2dd21..99babcc 100644
--- a/hat.c
+++ b/hat.c
@@ -12,7 +12,7 @@
  */
 
 #include <assert.h>
-#include <math.h>
+#include <tgmath.h>
 #include <stdbool.h>
 #include <stdio.h>
 #include <stdlib.h>
diff --git a/inertia.c b/inertia.c
index 1a958af..92747ed 100644
--- a/inertia.c
+++ b/inertia.c
@@ -12,7 +12,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/keen.c b/keen.c
index a414129..5624865 100644
--- a/keen.c
+++ b/keen.c
@@ -8,7 +8,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 #include "latin.h"
diff --git a/lightup.c b/lightup.c
index 0cead04..816dd70 100644
--- a/lightup.c
+++ b/lightup.c
@@ -48,7 +48,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/loopgen.c b/loopgen.c
index e738d4a..d8f5e27 100644
--- a/loopgen.c
+++ b/loopgen.c
@@ -8,7 +8,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 #include "tree234.h"
diff --git a/loopy.c b/loopy.c
index fd86296..b7d91de 100644
--- a/loopy.c
+++ b/loopy.c
@@ -77,7 +77,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 #include "tree234.h"
diff --git a/magnets.c b/magnets.c
index 0669978..90157bb 100644
--- a/magnets.c
+++ b/magnets.c
@@ -37,7 +37,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/map.c b/map.c
index 23f6fe9..76b0518 100644
--- a/map.c
+++ b/map.c
@@ -15,7 +15,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/mines.c b/mines.c
index 6cd9674..09e3422 100644
--- a/mines.c
+++ b/mines.c
@@ -13,7 +13,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "tree234.h"
 #include "puzzles.h"
diff --git a/misc.c b/misc.c
index 659de83..2cefd36 100644
--- a/misc.c
+++ b/misc.c
@@ -3,7 +3,7 @@
  */
 
 #include <assert.h>
-#include <math.h>
+#include <tgmath.h>
 #include <stdlib.h>
 #include <string.h>
 #include <stdio.h>
diff --git a/mosaic.c b/mosaic.c
index 080800c..5fb223e 100644
--- a/mosaic.c
+++ b/mosaic.c
@@ -14,7 +14,7 @@
 
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 #include <stdio.h>
 #include <stdlib.h>
 #include <string.h>
diff --git a/net.c b/net.c
index e7c47bb..e3357ac 100644
--- a/net.c
+++ b/net.c
@@ -8,7 +8,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 #include "tree234.h"
diff --git a/netslide.c b/netslide.c
index 2c10a37..a0b00b4 100644
--- a/netslide.c
+++ b/netslide.c
@@ -9,7 +9,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 #include "tree234.h"
diff --git a/nullgame.c b/nullgame.c
index c539d1b..c5ad0c9 100644
--- a/nullgame.c
+++ b/nullgame.c
@@ -16,7 +16,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/pattern.c b/pattern.c
index 8f88283..d8f050b 100644
--- a/pattern.c
+++ b/pattern.c
@@ -8,7 +8,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/pearl.c b/pearl.c
index 2cbaf0f..74ab471 100644
--- a/pearl.c
+++ b/pearl.c
@@ -36,7 +36,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 #include "grid.h"
diff --git a/pegs.c b/pegs.c
index cd696f6..0639eb3 100644
--- a/pegs.c
+++ b/pegs.c
@@ -8,7 +8,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 #include "tree234.h"
diff --git a/penrose.c b/penrose.c
index df0b72e..6ae9756 100644
--- a/penrose.c
+++ b/penrose.c
@@ -9,7 +9,7 @@
 
 #include <assert.h>
 #include <string.h>
-#include <math.h>
+#include <tgmath.h>
 #include <stdio.h>
 
 #include "puzzles.h" /* for malloc routines, and PI */
diff --git a/range.c b/range.c
index 293b6cb..45ab10b 100644
--- a/range.c
+++ b/range.c
@@ -58,7 +58,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/rect.c b/rect.c
index 1dffacb..40bc846 100644
--- a/rect.c
+++ b/rect.c
@@ -26,7 +26,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/samegame.c b/samegame.c
index fd5cfad..54e73d5 100644
--- a/samegame.c
+++ b/samegame.c
@@ -68,7 +68,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/signpost.c b/signpost.c
index 70b444a..aeb32ea 100644
--- a/signpost.c
+++ b/signpost.c
@@ -8,7 +8,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/singles.c b/singles.c
index a4c901d..3fc9d5a 100644
--- a/singles.c
+++ b/singles.c
@@ -58,7 +58,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 #include "latin.h"
diff --git a/sixteen.c b/sixteen.c
index 6029b8d..7dbb9c3 100644
--- a/sixteen.c
+++ b/sixteen.c
@@ -10,7 +10,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/slant.c b/slant.c
index bcf02ee..a174011 100644
--- a/slant.c
+++ b/slant.c
@@ -28,7 +28,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/solo.c b/solo.c
index 6b2862f..ed1787b 100644
--- a/solo.c
+++ b/solo.c
@@ -87,7 +87,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #ifdef STANDALONE_SOLVER
 #include <stdarg.h>
diff --git a/tents.c b/tents.c
index f6b8544..47a0d11 100644
--- a/tents.c
+++ b/tents.c
@@ -33,7 +33,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 #include "matching.h"
diff --git a/towers.c b/towers.c
index 1e2647d..b3b1478 100644
--- a/towers.c
+++ b/towers.c
@@ -23,7 +23,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 #include "latin.h"
diff --git a/tracks.c b/tracks.c
index 6b882e9..151f7fb 100644
--- a/tracks.c
+++ b/tracks.c
@@ -21,7 +21,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/twiddle.c b/twiddle.c
index 215d225..2c15617 100644
--- a/twiddle.c
+++ b/twiddle.c
@@ -11,7 +11,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/undead.c b/undead.c
index 833eb34..4ef8fe4 100644
--- a/undead.c
+++ b/undead.c
@@ -35,7 +35,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/unequal.c b/unequal.c
index 9c75d51..f50197b 100644
--- a/unequal.c
+++ b/unequal.c
@@ -21,7 +21,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 #include "latin.h" /* contains typedef for digit */
diff --git a/unfinished/group.c b/unfinished/group.c
index 891c4e4..345deb5 100644
--- a/unfinished/group.c
+++ b/unfinished/group.c
@@ -31,7 +31,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 #include "latin.h"
diff --git a/unfinished/numgame.c b/unfinished/numgame.c
index 849c83e..5de69a2 100644
--- a/unfinished/numgame.c
+++ b/unfinished/numgame.c
@@ -40,7 +40,7 @@
 #include <string.h>
 #include <limits.h>
 #include <assert.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 #include "tree234.h"
diff --git a/unfinished/separate.c b/unfinished/separate.c
index 9ffa632..fdeeb3d 100644
--- a/unfinished/separate.c
+++ b/unfinished/separate.c
@@ -94,7 +94,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/unfinished/slide.c b/unfinished/slide.c
index acddd93..a4cf168 100644
--- a/unfinished/slide.c
+++ b/unfinished/slide.c
@@ -32,7 +32,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 #include "tree234.h"
diff --git a/unfinished/sokoban.c b/unfinished/sokoban.c
index 80596c2..a493bf4 100644
--- a/unfinished/sokoban.c
+++ b/unfinished/sokoban.c
@@ -58,7 +58,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/unruly.c b/unruly.c
index af84111..c791baf 100644
--- a/unruly.c
+++ b/unruly.c
@@ -47,7 +47,7 @@
 #include <string.h>
 #include <assert.h>
 #include <ctype.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 
diff --git a/untangle.c b/untangle.c
index cd1762f..558cce7 100644
--- a/untangle.c
+++ b/untangle.c
@@ -32,7 +32,7 @@
 #include <assert.h>
 #include <ctype.h>
 #include <limits.h>
-#include <math.h>
+#include <tgmath.h>
 
 #include "puzzles.h"
 #include "tree234.h"