Reorganisation of the source tree

Most of the other users of the fptools build system have migrated to
Cabal, and with the move to darcs we can now flatten the source tree
without losing history, so here goes.

The main change is that the ghc/ subdir is gone, and most of what it
contained is now at the top level.  The build system now makes no
pretense at being multi-project, it is just the GHC build system.

No doubt this will break many things, and there will be a period of
instability while we fix the dependencies.  A straightforward build
should work, but I haven't yet fixed binary/source distributions.
Changes to the Building Guide will follow, too.

1 files changed, 130 insertions, 0 deletions

diff --git a/utils/hp2ps/Shade.c b/utils/hp2ps/Shade.c
new file mode 100644
index 0000000000..9e3274bf69
--- /dev/null
+++ b/utils/hp2ps/Shade.c
@@ -0,0 +1,130 @@
+#include "Main.h"
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "Defines.h"
+#include "Error.h"
+#include "Utilities.h"
+
+/* own stuff */
+#include "Shade.h"
+
+static struct shade {
+	char* ident;
+	floatish shade;
+} *shademap;
+
+static int shademapmax = 0;
+static int shademapindex = 0;
+
+/*
+ *	Set the shade to be used for "ident" to "shade".
+ */
+
+void
+ShadeFor(ident, shade)
+  char* ident; 
+  floatish shade;
+{
+    if (! shademap) {
+	shademapmax = (nidents > TWENTY ? nidents : TWENTY) * 2;
+	         /* Assume nidents read is indication of the No of
+		    idents in the .aux file (*2 for good luck) */
+	         /* NB *2 is needed as .aux and .hp elements may differ */
+	shademap = xmalloc(shademapmax * sizeof(struct shade));
+    }
+
+    if (shademapindex < shademapmax) {
+	shademap[ shademapindex ].ident = copystring(ident);
+	shademap[ shademapindex ].shade = shade;
+	shademapindex++;
+    } else {
+	Disaster("shade map overflow");
+    }
+}
+
+/*
+ *	Get the shade to be used for "ident" if there is one. 
+ *	Otherwise, think of a new one.
+ */
+
+static floatish ThinkOfAShade PROTO((void));	/* forward */
+
+floatish
+ShadeOf(ident)
+  char* ident;
+{
+    int i;
+    floatish shade;
+
+    for (i = 0; i < shademapindex; i++) {
+	if (strcmp(shademap[i].ident, ident) == 0) {	/* got it */
+	    return(shademap[i].shade);
+	}
+    }
+
+    shade = ThinkOfAShade();
+
+    ShadeFor(ident, shade);
+
+    return shade; 
+}
+
+
+
+#define N_MONO_SHADES 10 
+
+static floatish m_shades[ N_MONO_SHADES ] = {
+    0.00000, 0.20000, 0.60000, 0.30000, 0.90000, 
+    0.40000, 1.00000, 0.70000, 0.50000,  0.80000
+};
+
+#define N_COLOUR_SHADES 27
+
+/* HACK: 0.100505 means 100% red, 50% green, 50% blue */
+
+static floatish c_shades[ N_COLOUR_SHADES ] = {
+    0.000000, 0.000010, 0.001000, 0.001010, 0.100000,
+    0.100010, 0.101000, 0.101010, 0.000005, 0.000500,
+    0.000510, 0.001005, 0.050000, 0.050010, 0.051000,
+    0.051010, 0.100005, 0.100500, 0.100510, 0.101005,
+    0.000505, 0.050005, 0.050500, 0.050510, 0.051005,
+    0.100505, 0.050505
+};
+
+static floatish
+ThinkOfAShade()
+{
+    static int thisshade = -1;
+
+    thisshade++;
+    return cflag ?
+	c_shades[ thisshade % N_COLOUR_SHADES ] :
+	m_shades[ thisshade % N_MONO_SHADES   ] ;
+}
+
+static floatish
+extract_colour(shade,factor)
+  floatish shade;
+  intish factor;
+{
+    intish i,j;
+
+    i = (int)(shade * factor);
+    j = i / 100;
+    return (i - j * 100) / 10.0;
+}
+
+void
+SetPSColour(shade)
+  floatish shade;
+{
+    if (cflag) {
+	fprintf(psfp, "%f %f %f setrgbcolor\n",
+		extract_colour(shade, (intish)100),
+		extract_colour(shade, (intish)10000),
+		extract_colour(shade, (intish)1000000));
+    } else {
+	fprintf(psfp, "%f setgray\n", shade);
+    }
+}