IBMgraphics/UTF-8 patch for 3.4.0
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This post to rec.games.roguelike.nethack describes a patch for NetHack 3.4.0 to allow the TTY mode to display IBMgraphics on terminals that support UTF-8.
The complete thread can be found in the Wayback Machine's archive of Google Groups. Google Groups itself only sporadically allows reading of direct links to posts. This post contains a patch, and Google Groups' mangling of whitespace is a problem.
The text below is reconstructed, based on the Google Groups version and an ancient backup containing the source tree from which the original patch was made.
Subject: [PATCH] IBMgraphics on UTF-8 enabled terminals
From: Ray Chason <long-defunct email address>
Date: Jul 31, 2002, 5:33:16 AM
Really more of a proof of concept than anything else, this patch provides
a new option in config.h, UNICODE, that enables use of Unicode to
display IBMgraphics.
It ought to be switchable at run time, of course; all in good time.
The details of the patch are listed in a separate post.
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diff -U 3 -r nethack-3.4.0/include/config.h nethack-3.4.0-utf8/include/config.h
--- nethack-3.4.0/include/config.h Fri Mar 22 23:52:46 2002
+++ nethack-3.4.0-utf8/include/config.h Tue Jul 30 22:11:10 2002
@@ -48,6 +48,9 @@
/* #define GNOME_GRAPHICS */ /* Gnome interface */
/* #define MSWIN_GRAPHICS */ /* Windows NT, CE, Graphics */
+/* Define to display IBMgraphics via UTF-8 */
+#define UNICODE
+
/*
* Define the default window system. This should be one that is compiled
* into your system (see defines above). Known window systems are:
diff -U 3 -r nethack-3.4.0/src/drawing.c nethack-3.4.0-utf8/src/drawing.c
--- nethack-3.4.0/src/drawing.c Fri Mar 22 23:52:47 2002
+++ nethack-3.4.0-utf8/src/drawing.c Tue Jul 30 22:49:53 2002
@@ -741,10 +741,15 @@
static const uchar IBM_r_oc_syms[MAXOCLASSES] = { /* a la EPYX Rogue */
/* 0*/ '\0',
ILLOBJ_SYM,
-# if defined(MSDOS) || defined(OS2) || ( defined(WIN32) && !defined(MSWIN_GRAPHICS) )
+# if defined(UNICODE) || defined(MSDOS) || defined(OS2) || ( defined(WIN32) && !defined(MSWIN_GRAPHICS) )
0x18, /* weapon: up arrow */
+# if defined(UNICODE)
+ 0x0a, /* armor: Vert rect with o */
+ 0x0b, /* ring: circle with arrow */
+# else
/* 0x0a, */ ARMOR_SYM, /* armor: Vert rect with o */
/* 0x09, */ RING_SYM, /* ring: circle with arrow */
+# endif
/* 5*/ 0x0c, /* amulet: "female" symbol */
TOOL_SYM,
0x05, /* food: club (as in cards) */
diff -U 3 -r nethack-3.4.0/src/mapglyph.c nethack-3.4.0-utf8/src/mapglyph.c
--- nethack-3.4.0/src/mapglyph.c Fri Mar 22 23:52:45 2002
+++ nethack-3.4.0-utf8/src/mapglyph.c Tue Jul 30 23:20:18 2002
@@ -3,6 +3,7 @@
/* NetHack may be freely redistributed. See license for details. */
#include "hack.h"
+#include "tcap.h"
#if defined(TTY_GRAPHICS)
#include "wintty.h" /* for prototype of has_color() only */
#endif
diff -U 3 -r nethack-3.4.0/sys/share/ioctl.c nethack-3.4.0-utf8/sys/share/ioctl.c
--- nethack-3.4.0/sys/share/ioctl.c Fri Mar 22 23:52:49 2002
+++ nethack-3.4.0-utf8/sys/share/ioctl.c Tue Jul 30 22:19:20 2002
@@ -68,6 +68,10 @@
#include "tcap.h" /* for LI and CO */
#endif
+#ifdef UNICODE
+extern void NDECL(utf8_mapon);
+extern void NDECL(utf8_mapoff);
+#else
#ifdef _M_UNIX
extern void NDECL(sco_mapon);
extern void NDECL(sco_mapoff);
@@ -76,6 +80,7 @@
extern void NDECL(linux_mapon);
extern void NDECL(linux_mapoff);
#endif
+#endif
#ifdef AUX
void
@@ -157,24 +162,32 @@
# ifdef SIGTSTP
if(signal(SIGTSTP, SIG_IGN) == SIG_DFL) {
suspend_nhwindows((char *)0);
+# ifdef UNICODE
+ utf8_mapon();
+# else
# ifdef _M_UNIX
sco_mapon();
# endif
# ifdef __linux__
linux_mapon();
# endif
+# endif
(void) signal(SIGTSTP, SIG_DFL);
# ifdef AUX
( void ) kill ( 0 , SIGSTOP ) ;
# else
(void) kill(0, SIGTSTP);
# endif
+# ifdef UNICODE
+ utf8_mapoff();
+# else
# ifdef _M_UNIX
sco_mapoff();
# endif
# ifdef __linux__
linux_mapoff();
# endif
+# endif
resume_nhwindows();
} else {
pline("I don't think your shell has job control.");
diff -U 3 -r nethack-3.4.0/sys/share/unixtty.c nethack-3.4.0-utf8/sys/share/unixtty.c
--- nethack-3.4.0/sys/share/unixtty.c Fri Mar 22 23:52:49 2002
+++ nethack-3.4.0-utf8/sys/share/unixtty.c Tue Jul 30 22:26:01 2002
@@ -307,7 +307,48 @@
#endif
}
-#ifdef _M_UNIX /* SCO UNIX (3.2.4), from Andreas Arens */
+#if defined(UNICODE)
+void NDECL(utf8_mapon);
+void NDECL(utf8_mapoff);
+void NDECL(init_utf8_cons);
+
+void
+utf8_mapon()
+{
+# ifdef TTY_GRAPHICS
+ if (!strcmp(windowprocs.name, "tty")) {
+ fwrite("\033%@", 1, 3, stdout);
+ }
+# endif
+}
+
+void
+utf8_mapoff()
+{
+# ifdef TTY_GRAPHICS
+ if (!strcmp(windowprocs.name, "tty")) {
+ fwrite("\033%G", 1, 3, stdout);
+ }
+# endif
+}
+
+void
+init_utf8_cons()
+{
+# ifdef TTY_GRAPHICS
+ if (!strcmp(windowprocs.name, "tty")) {
+ atexit(utf8_mapon);
+ utf8_mapoff();
+# ifdef TEXTCOLOR
+ if (has_colors())
+ iflags.use_color = TRUE;
+# endif
+ }
+# endif
+}
+#endif
+
+#if defined(_M_UNIX) && !defined(UNICODE) /* SCO UNIX (3.2.4), from Andreas Arens */
# include <sys/console.h>
# define BSIZE (E_TABSZ*2)
@@ -373,10 +414,10 @@
}
# endif
}
-#endif /* _M_UNIX */
+#endif /* _M_UNIX && !UNICODE */
-#ifdef __linux__ /* via Jesse Thilo and Ben Gertzfield */
+#if defined(__linux__) && !defined(UNICODE) /* via Jesse Thilo and Ben Gertzfield */
# include <sys/vt.h>
int linux_flag_console = 0;
@@ -430,7 +471,7 @@
}
# endif
}
-#endif /* __linux__ */
+#endif /* __linux__ && !UNICODE */
#ifndef __begui__ /* the Be GUI will define its own error proc */
diff -U 3 -r nethack-3.4.0/sys/unix/unixmain.c nethack-3.4.0-utf8/sys/unix/unixmain.c
--- nethack-3.4.0/sys/unix/unixmain.c Fri Mar 22 23:52:49 2002
+++ nethack-3.4.0-utf8/sys/unix/unixmain.c Tue Jul 30 22:26:30 2002
@@ -30,6 +30,9 @@
static boolean NDECL(whoami);
static void FDECL(process_options, (int, char **));
+#ifdef UNICODE
+extern void NDECL(init_utf8_cons);
+#else
#ifdef _M_UNIX
extern void NDECL(check_sco_console);
extern void NDECL(init_sco_cons);
@@ -38,6 +41,7 @@
extern void NDECL(check_linux_console);
extern void NDECL(init_linux_cons);
#endif
+#endif
static void NDECL(wd_message);
#ifdef WIZARD
@@ -143,21 +147,27 @@
chdirx(dir,1);
#endif
+#ifndef UNICODE
#ifdef _M_UNIX
check_sco_console();
#endif
#ifdef __linux__
check_linux_console();
#endif
+#endif
initoptions();
init_nhwindows(&argc,argv);
exact_username = whoami();
+#ifdef UNICODE
+ init_utf8_cons();
+#else
#ifdef _M_UNIX
init_sco_cons();
#endif
#ifdef __linux__
init_linux_cons();
#endif
+#endif
/*
* It seems you really want to play.
diff -U 3 -r nethack-3.4.0/sys/unix/unixunix.c nethack-3.4.0-utf8/sys/unix/unixunix.c
--- nethack-3.4.0/sys/unix/unixunix.c Fri Mar 22 23:52:49 2002
+++ nethack-3.4.0-utf8/sys/unix/unixunix.c Tue Jul 30 22:19:42 2002
@@ -13,6 +13,10 @@
#endif
#include <signal.h>
+#ifdef UNICODE
+extern void NDECL(utf8_mapon);
+extern void NDECL(utf8_mapoff);
+#else
#ifdef _M_UNIX
extern void NDECL(sco_mapon);
extern void NDECL(sco_mapoff);
@@ -21,6 +25,7 @@
extern void NDECL(linux_mapon);
extern void NDECL(linux_mapoff);
#endif
+#endif
static struct stat buf;
@@ -244,12 +249,16 @@
{
register int f;
suspend_nhwindows((char *)0); /* also calls end_screen() */
+#ifdef UNICODE
+ utf8_mapon();
+#else
#ifdef _M_UNIX
sco_mapon();
#endif
#ifdef __linux__
linux_mapon();
#endif
+#endif
if((f = fork()) == 0){ /* child */
(void) setgid(getgid());
(void) setuid(getuid());
@@ -266,12 +275,16 @@
(void) signal(SIGINT,SIG_IGN);
(void) signal(SIGQUIT,SIG_IGN);
(void) wait( (int *) 0);
+#ifdef UNICODE
+ utf8_mapoff();
+#else
#ifdef _M_UNIX
sco_mapoff();
#endif
#ifdef __linux__
linux_mapoff();
#endif
+#endif
(void) signal(SIGINT, (SIG_RET_TYPE) done1);
#ifdef WIZARD
if(wizard) (void) signal(SIGQUIT,SIG_DFL);
diff -U 3 -r nethack-3.4.0/win/tty/wintty.c nethack-3.4.0-utf8/win/tty/wintty.c
--- nethack-3.4.0/win/tty/wintty.c Fri Mar 22 23:52:49 2002
+++ nethack-3.4.0-utf8/win/tty/wintty.c Tue Jul 30 22:45:21 2002
@@ -25,6 +25,10 @@
# endif
#endif
+# if defined(UNICODE)
+static void FDECL (put_utf8, (int));
+#endif
+
#ifndef NO_TERMS
#include "tcap.h"
@@ -1684,7 +1688,11 @@
case NHW_MAP:
case NHW_BASE:
tty_curs(window, x, y);
+#ifdef UNICODE
+ put_utf8(ch); /* To print the currency symbol on the Rogue level */
+#else
(void) putchar(ch);
+#endif
ttyDisplay->curx++;
cw->curx++;
break;
@@ -2293,6 +2301,67 @@
#endif
}
+# if defined(UNICODE)
+static void
+put_utf8(ch)
+int ch;
+{
+ /* CP437 to Unicode mapping according to the Unicode Consortium */
+ static ushort cp437[] =
+ {
+ 0x0020, 0x263A, 0x263B, 0x2665, 0x2666, 0x2663, 0x2660, 0x2022,
+ 0x25D8, 0x25CB, 0x25D9, 0x2642, 0x2640, 0x266A, 0x266B, 0x263C,
+ 0x25BA, 0x25C4, 0x2195, 0x203C, 0x00B6, 0x00A7, 0x25AC, 0x21A8,
+ 0x2191, 0x2193, 0x2192, 0x2190, 0x221F, 0x2194, 0x25B2, 0x25BC,
+ 0x0020, 0x0021, 0x0022, 0x0023, 0x0024, 0x0025, 0x0026, 0x0027,
+ 0x0028, 0x0029, 0x002a, 0x002b, 0x002c, 0x002d, 0x002e, 0x002f,
+ 0x0030, 0x0031, 0x0032, 0x0033, 0x0034, 0x0035, 0x0036, 0x0037,
+ 0x0038, 0x0039, 0x003a, 0x003b, 0x003c, 0x003d, 0x003e, 0x003f,
+ 0x0040, 0x0041, 0x0042, 0x0043, 0x0044, 0x0045, 0x0046, 0x0047,
+ 0x0048, 0x0049, 0x004a, 0x004b, 0x004c, 0x004d, 0x004e, 0x004f,
+ 0x0050, 0x0051, 0x0052, 0x0053, 0x0054, 0x0055, 0x0056, 0x0057,
+ 0x0058, 0x0059, 0x005a, 0x005b, 0x005c, 0x005d, 0x005e, 0x005f,
+ 0x0060, 0x0061, 0x0062, 0x0063, 0x0064, 0x0065, 0x0066, 0x0067,
+ 0x0068, 0x0069, 0x006a, 0x006b, 0x006c, 0x006d, 0x006e, 0x006f,
+ 0x0070, 0x0071, 0x0072, 0x0073, 0x0074, 0x0075, 0x0076, 0x0077,
+ 0x0078, 0x0079, 0x007a, 0x007b, 0x007c, 0x007d, 0x007e, 0x2302,
+ 0x00c7, 0x00fc, 0x00e9, 0x00e2, 0x00e4, 0x00e0, 0x00e5, 0x00e7,
+ 0x00ea, 0x00eb, 0x00e8, 0x00ef, 0x00ee, 0x00ec, 0x00c4, 0x00c5,
+ 0x00c9, 0x00e6, 0x00c6, 0x00f4, 0x00f6, 0x00f2, 0x00fb, 0x00f9,
+ 0x00ff, 0x00d6, 0x00dc, 0x00a2, 0x00a3, 0x00a5, 0x20a7, 0x0192,
+ 0x00e1, 0x00ed, 0x00f3, 0x00fa, 0x00f1, 0x00d1, 0x00aa, 0x00ba,
+ 0x00bf, 0x2310, 0x00ac, 0x00bd, 0x00bc, 0x00a1, 0x00ab, 0x00bb,
+ 0x2591, 0x2592, 0x2593, 0x2502, 0x2524, 0x2561, 0x2562, 0x2556,
+ 0x2555, 0x2563, 0x2551, 0x2557, 0x255d, 0x255c, 0x255b, 0x2510,
+ 0x2514, 0x2534, 0x252c, 0x251c, 0x2500, 0x253c, 0x255e, 0x255f,
+ 0x255a, 0x2554, 0x2569, 0x2566, 0x2560, 0x2550, 0x256c, 0x2567,
+ 0x2568, 0x2564, 0x2565, 0x2559, 0x2558, 0x2552, 0x2553, 0x256b,
+ 0x256a, 0x2518, 0x250c, 0x2588, 0x2584, 0x258c, 0x2590, 0x2580,
+ 0x03b1, 0x00df, 0x0393, 0x03c0, 0x03a3, 0x03c3, 0x00b5, 0x03c4,
+ 0x03a6, 0x0398, 0x03a9, 0x03b4, 0x221e, 0x03c6, 0x03b5, 0x2229,
+ 0x2261, 0x00b1, 0x2265, 0x2264, 0x2320, 0x2321, 0x00f7, 0x2248,
+ 0x00b0, 0x2219, 0x00b7, 0x221a, 0x207f, 0x00b2, 0x25a0, 0x00a0
+ };
+ ushort code;
+
+ /* Convert selected code to UTF-8 */
+ code = cp437[ch & 0xFF];
+ if (code < 0x80) {
+ putchar(code);
+ }
+ else if (code < 0x0800) {
+ putchar(0xC0 | ((code>> 6) & 0x1F));
+ putchar(0x80 | ( code & 0x3F));
+ }
+ else {
+ putchar(0xE0 | ((code>>12) & 0x1F));
+ putchar(0x80 | ((code>> 6) & 0x3F));
+ putchar(0x80 | ( code & 0x3F));
+ }
+}
+# endif
+
+
#ifndef WIN32
void
g_putch(in_ch)
@@ -2303,7 +2372,12 @@
# if defined(ASCIIGRAPH) && !defined(NO_TERMS)
if (iflags.IBMgraphics || iflags.eight_bit_tty) {
/* IBM-compatible displays don't need other stuff */
+# if defined(UNICODE)
+ /* IBM graphics via UTF-8 */
+ put_utf8(ch);
+# else
(void) putchar(ch);
+# endif
} else if (ch & 0x80) {
if (!GFlag || HE_resets_AS) {
graph_on();
--CUT HERE--CUT HERE--CUT HERE--CUT HERE--CUT HERE--CUT HERE--CUT HERE--
--
--------------===============<[ Ray Chason ]>===============--------------
PGP public key at http://www.smart.net/~rchason/pubkey.asc
Delenda est Windoze