Misc. fixes

With the siwtch to a C++ compiler, the AC_PATH_XTRA has become less
effective as it internally relies on the C compiler invokation.  Fixed
CXXFLAGS, CPPFLAGS, and LDFLAGS when detecting <X11/xpm.h> usability.

Various bitmasks in src/hyper and src/graph were bogusly using 'char'
(instead of 'unsigned char') when they specify values larger than 127.
Caught by the C++ compiler, thanks to no-narrowing conversion.  Fixed.

Eventually the X11-based HD interface and graphics should be replaced
by a more modern GUI interface.

10 files changed, 30 insertions, 19 deletions

diff --git a/src/hyper/ht_icon b/src/hyper/ht_icon
index 859e0fe2..b50a3143 100644
--- a/src/hyper/ht_icon
+++ b/src/hyper/ht_icon
@@ -2,7 +2,7 @@
 #define ht_icon_height 40
 #define ht_icon_x_hot -1
 #define ht_icon_y_hot -1
-static char ht_icon_bits[] = {
+static unsigned char ht_icon_bits[] = {
    0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
    0x00, 0x00, 0x00, 0xf7, 0x00, 0x00, 0x00, 0x00, 0xe7, 0x00, 0x00, 0x00,
    0x00, 0xe7, 0x00, 0x00, 0x00, 0x00, 0xe7, 0xef, 0x7b, 0x3c, 0xe7, 0xff,
diff --git a/src/hyper/hyper.h b/src/hyper/hyper.h
index c4956a5f..9f936764 100644
--- a/src/hyper/hyper.h
+++ b/src/hyper/hyper.h
@@ -1,7 +1,7 @@
 /*
   Copyright (C) 1991-2002, The Numerical Algorithms Group Ltd.
   All rights reserved.
-  Copyright (C) 2007-2010, Gabriel Dos Reis.
+  Copyright (C) 2007-2016, Gabriel Dos Reis.
   All rights reserved.
 
   Redistribution and use in source and binary forms, with or without
@@ -303,4 +303,13 @@ extern GroupItem   *gTopOfGroupStack;
 
 extern HyperDocPage *gPageBeingParsed;
 
+
+// Kludge between the more correct 'array of unsigned char' incoming data,
+// and the unprincipled 'pointer to char' parameters of several X11
+// functions below.
+template<int N>
+inline const char* as_chars(const unsigned char (&ary)[N]) {
+   return reinterpret_cast<const char*>(&ary[0]);
+}
+
 #endif
diff --git a/src/hyper/initx.c b/src/hyper/initx.c
index 521bc8cb..5b8dee53 100644
--- a/src/hyper/initx.c
+++ b/src/hyper/initx.c
@@ -1,7 +1,7 @@
 /*
   Copyright (C) 1991-2002, The Numerical Algorithms Group Ltd.
   All rights reserved.
-  Copyright (C) 2007-2012, Gabriel Dos Reis.
+  Copyright (C) 2007-2016, Gabriel Dos Reis.
   All rights reserved.
 
   Redistribution and use in source and binary forms, with or without
@@ -86,6 +86,7 @@ static void open_window(Window w);
 static void set_name_and_icon(void);
 static void set_size_hints(Window w);
 
+
 static GContext server_font;
 unsigned long *spadColors;
 int scrn;  /* used in spad_colors */
@@ -176,11 +177,11 @@ initializeWindowSystem(void)
 /*  fprintf(stderr,"initx:initializeWindowSystem:XCreateBitmapFromData 1\n");*/
     mousebits = XCreateBitmapFromData(gXDisplay,
         RootWindow(gXDisplay, gXScreenNumber),
-        mouseBitmap_bits, mouseBitmap_width,mouseBitmap_height);
+        as_chars(mouseBitmap_bits), mouseBitmap_width,mouseBitmap_height);
 /* fprintf(stderr,"initx:initializeWindowSystem:XCreateBitmapFromData 2\n");*/
     mousemask = XCreateBitmapFromData(gXDisplay,
         RootWindow(gXDisplay, gXScreenNumber),
-        mouseMask_bits, mouseMask_width,mouseMask_height);
+        as_chars(mouseMask_bits), mouseMask_width,mouseMask_height);
 /* fprintf(stderr,"initx:initializeWindowSystem:XCreateBitmapFromData 2\n");*/
     gActiveCursor = XCreatePixmapCursor(gXDisplay,
         mousebits, mousemask, &fg, &bg,
@@ -396,7 +397,8 @@ set_name_and_icon(void)
     XStoreName(gXDisplay, gWindow->fMainWindow, "HyperDoc");
 
     /* define and assign the pixmap for the icon */
-    icon_pixmap = XCreateBitmapFromData(gXDisplay, gWindow->fMainWindow, ht_icon_bits,
+    icon_pixmap = XCreateBitmapFromData(gXDisplay, gWindow->fMainWindow,
+                                        as_chars(ht_icon_bits),
                                         ht_icon_width, ht_icon_height);
     wmhints.icon_pixmap = icon_pixmap;
     wmhints.flags = IconPixmapHint;
@@ -592,7 +594,7 @@ set_size_hints(Window w)
 
 #define stipple_width 4
 #define stipple_height 4
-static char stipple_bits[] = {
+static unsigned char stipple_bits[] = {
                               0xff, 0xff, 0xff, 0xff};
 Pixmap stipple;
 
@@ -615,7 +617,7 @@ get_GCs(HDWindow *window)
 
     stipple = XCreateBitmapFromData(gXDisplay,
         RootWindow(gXDisplay, gXScreenNumber),
-        stipple_bits, stipple_width, stipple_height);
+        as_chars(stipple_bits), stipple_width, stipple_height);
 
     values.background = gInputBackgroundColor;
     values.foreground = gInputForegroundColor;
diff --git a/src/hyper/mouse11.bitmap b/src/hyper/mouse11.bitmap
index 231c6630..7ed282f2 100644
--- a/src/hyper/mouse11.bitmap
+++ b/src/hyper/mouse11.bitmap
@@ -2,7 +2,7 @@
 #define mouseBitmap_height 16
 #define mouseBitmap_x_hot 8
 #define mouseBitmap_y_hot 0
-static char mouseBitmap_bits[] = {
+static unsigned char mouseBitmap_bits[] = {
    0x00, 0x01, 0x00, 0x01, 0x80, 0x02, 0x40, 0x04, 0xc0, 0x06, 0x20, 0x08,
    0x20, 0x08, 0x30, 0x18, 0x50, 0x14, 0x58, 0x34, 0x90, 0x12, 0x20, 0x08,
    0xc0, 0x47, 0x00, 0x21, 0x80, 0x10, 0x00, 0x0f};
diff --git a/src/hyper/mouse11.mask b/src/hyper/mouse11.mask
index 6e5621f4..e458acd7 100644
--- a/src/hyper/mouse11.mask
+++ b/src/hyper/mouse11.mask
@@ -1,6 +1,6 @@
 #define mouseMask_width 16
 #define mouseMask_height 16
-static char mouseMask_bits[] = {
+static unsigned char mouseMask_bits[] = {
    0x00, 0x01, 0x00, 0x01, 0x80, 0x03, 0xc0, 0x07, 0xc0, 0x07, 0xe0, 0x0f,
    0xe0, 0x0f, 0xf0, 0x1f, 0xf0, 0x1f, 0xf8, 0x3f, 0xf0, 0x1f, 0xe0, 0x0f,
    0xc0, 0x47, 0x00, 0x21, 0x80, 0x10, 0x00, 0x0f};
diff --git a/src/hyper/scrollbar.c b/src/hyper/scrollbar.c
index bc858325..1bcc47bf 100644
--- a/src/hyper/scrollbar.c
+++ b/src/hyper/scrollbar.c
@@ -1,7 +1,7 @@
 /*
   Copyright (C) 1991-2002, The Numerical Algorithms Group Ltd.
   All rights reserved.
-  Copyright (C) 2007-2010, Gabriel Dos Reis.
+  Copyright (C) 2007-2016, Gabriel Dos Reis.
   All rights reserved.
 
   Redistribution and use in source and binary forms, with or without
@@ -183,7 +183,7 @@ makeScrollBarWindows(void)
         sup = XCreatePixmapFromBitmapData(
                                           gXDisplay,
                                     RootWindow(gXDisplay, gXScreenNumber),
-                                          sup_bits, supwidth, supheight,
+                                          const_cast<char*>(as_chars(sup_bits)), supwidth, supheight,
                                           FORECOLOR, BACKCOLOR,
                                  DefaultDepth(gXDisplay, gXScreenNumber));
 
@@ -191,7 +191,7 @@ makeScrollBarWindows(void)
         sdown = XCreatePixmapFromBitmapData(
                                             gXDisplay,
                                     RootWindow(gXDisplay, gXScreenNumber),
-                                      sdown_bits, sdown_width, sdown_height,
+                                    const_cast<char*>(as_chars(sdown_bits)), sdown_width, sdown_height,
                                             FORECOLOR, BACKCOLOR,
                                  DefaultDepth(gXDisplay, gXScreenNumber));
 
@@ -199,13 +199,13 @@ makeScrollBarWindows(void)
         sup_pressed = XCreatePixmapFromBitmapData(
                                                   gXDisplay,
                                     RootWindow(gXDisplay, gXScreenNumber),
-                                sup3dpr_bits, sup3dpr_width, sup3dpr_height,
+                                                  const_cast<char*>(as_chars(sup3dpr_bits)), sup3dpr_width, sup3dpr_height,
                                                   FORECOLOR, BACKCOLOR,
                                  DefaultDepth(gXDisplay, gXScreenNumber));
         sdown_pressed = XCreatePixmapFromBitmapData(
                                                     gXDisplay,
                                     RootWindow(gXDisplay, gXScreenNumber),
-                          sdown3dpr_bits, sdown3dpr_width, sdown3dpr_height,
+                                    const_cast<char*>(as_chars(sdown3dpr_bits)), sdown3dpr_width, sdown3dpr_height,
                                                     FORECOLOR, BACKCOLOR,
                                  DefaultDepth(gXDisplay, gXScreenNumber));
     }
diff --git a/src/hyper/sdown3d.bitmap b/src/hyper/sdown3d.bitmap
index e34dc105..ccdf726b 100644
--- a/src/hyper/sdown3d.bitmap
+++ b/src/hyper/sdown3d.bitmap
@@ -1,6 +1,6 @@
 #define sdown3d_width 21
 #define sdown3d_height 21
-static char sdown3d_bits[] = {
+static unsigned char sdown3d_bits[] = {
    0xaa, 0xaa, 0x0a, 0x55, 0x55, 0x15, 0x02, 0x00, 0x0c, 0x51, 0x55, 0x15,
    0xaa, 0xaa, 0x0e, 0x51, 0x5f, 0x15, 0xaa, 0xae, 0x0e, 0x51, 0x5f, 0x15,
    0xaa, 0xae, 0x0e, 0x51, 0x5f, 0x15, 0xea, 0xff, 0x0e, 0xd1, 0x7f, 0x15,
diff --git a/src/hyper/sdown3dpr.bitmap b/src/hyper/sdown3dpr.bitmap
index 6ce090b1..54c693a6 100644
--- a/src/hyper/sdown3dpr.bitmap
+++ b/src/hyper/sdown3dpr.bitmap
@@ -1,6 +1,6 @@
 #define sdown3dpr_width 21
 #define sdown3dpr_height 21
-static char sdown3dpr_bits[] = {
+static unsigned char sdown3dpr_bits[] = {
    0xaa, 0xaa, 0x0a, 0x55, 0x55, 0x15, 0xfe, 0xff, 0x0f, 0x55, 0x55, 0x11,
    0xae, 0xaa, 0x0a, 0x55, 0x55, 0x11, 0xae, 0xbe, 0x0a, 0x55, 0x5d, 0x11,
    0xae, 0xbe, 0x0a, 0x55, 0x5d, 0x11, 0xae, 0xbe, 0x0a, 0xd5, 0xff, 0x11,
diff --git a/src/hyper/sup3d.bitmap b/src/hyper/sup3d.bitmap
index c1dd285b..f5197b5a 100644
--- a/src/hyper/sup3d.bitmap
+++ b/src/hyper/sup3d.bitmap
@@ -1,6 +1,6 @@
 #define sup3d_width 21
 #define sup3d_height 21
-static char sup3d_bits[] = {
+static unsigned char sup3d_bits[] = {
    0xaa, 0xaa, 0x0a, 0x55, 0x55, 0x15, 0x02, 0x00, 0x0c, 0x51, 0x55, 0x15,
    0xaa, 0xaa, 0x0e, 0x51, 0x55, 0x15, 0xaa, 0xae, 0x0e, 0x51, 0x5f, 0x15,
    0xaa, 0xbf, 0x0e, 0xd1, 0x7f, 0x15, 0xea, 0xff, 0x0e, 0x51, 0x5f, 0x15,
diff --git a/src/hyper/sup3dpr.bitmap b/src/hyper/sup3dpr.bitmap
index 2617792f..e2e7109a 100644
--- a/src/hyper/sup3dpr.bitmap
+++ b/src/hyper/sup3dpr.bitmap
@@ -1,6 +1,6 @@
 #define sup3dpr_width 21
 #define sup3dpr_height 21
-static char sup3dpr_bits[] = {
+static unsigned char sup3dpr_bits[] = {
    0xaa, 0xaa, 0x0a, 0x55, 0x55, 0x15, 0xfe, 0xff, 0x0f, 0x55, 0x55, 0x11,
    0xae, 0xaa, 0x0a, 0x55, 0x55, 0x11, 0xae, 0xaa, 0x0a, 0x55, 0x5d, 0x11,
    0xae, 0xbe, 0x0a, 0x55, 0x7f, 0x11, 0xae, 0xff, 0x0a, 0xd5, 0xff, 0x11,