--- /dev/null
+/* SCCS Id: @(#)vmstty.c 3.3 1995/07/09 */
+/* Copyright (c) Stichting Mathematisch Centrum, Amsterdam, 1985. */
+/* NetHack may be freely redistributed. See license for details. */
+/* tty.c - (VMS) version */
+
+#define NEED_VARARGS
+#include "hack.h"
+#include "wintty.h"
+#include "tcap.h"
+
+#include <descrip.h>
+#include <iodef.h>
+#ifndef __GNUC__
+#include <smgdef.h>
+#include <ttdef.h>
+#include <tt2def.h>
+#else /* values needed from missing include files */
+# define SMG$K_TRM_UP 274
+# define SMG$K_TRM_DOWN 275
+# define SMG$K_TRM_LEFT 276
+# define SMG$K_TRM_RIGHT 277
+# define TT$M_MECHTAB 0x00000100 /* hardware tab support */
+# define TT$M_MECHFORM 0x00080000 /* hardware form-feed support */
+# define TT$M_NOBRDCST 0x00020000 /* disable broadcast messages, but */
+# define TT2$M_BRDCSTMBX 0x00000010 /* catch them in associated mailbox */
+# define TT2$M_APP_KEYPAD 0x00800000 /* application vs numeric keypad mode */
+#endif /* __GNUC__ */
+#ifdef USE_QIO_INPUT
+#include <ssdef.h>
+#endif
+#include <errno.h>
+#include <signal.h>
+
+unsigned long lib$disable_ctrl(), lib$enable_ctrl();
+unsigned long sys$assign(), sys$dassgn(), sys$qiow();
+#ifndef USE_QIO_INPUT
+unsigned long smg$create_virtual_keyboard(), smg$delete_virtual_keyboard(),
+ smg$read_keystroke(), smg$cancel_input();
+#else
+static short FDECL(parse_function_key, (int));
+#endif
+static void NDECL(setctty);
+static void NDECL(resettty);
+
+#define vms_ok(sts) ((sts)&1)
+#define META(c) ((c)|0x80) /* 8th bit */
+#define CTRL(c) ((c)&0x1F)
+#define CMASK(c) (1<<CTRL(c))
+#define LIB$M_CLI_CTRLT CMASK('T') /* 0x00100000 */
+#define LIB$M_CLI_CTRLY CMASK('Y') /* 0x02000000 */
+#define ESC '\033'
+#define CSI META(ESC) /* '\233' */
+#define SS3 META(CTRL('O')) /* '\217' */
+
+extern short ospeed;
+char erase_char, intr_char, kill_char;
+static boolean settty_needed = FALSE, bombing = FALSE;
+static unsigned long kb = 0;
+#ifdef USE_QIO_INPUT
+static char inputbuf[15+1], *inp = 0;
+static int inc = 0;
+#endif
+
+#define QIO_FUNC IO$_TTYREADALL|IO$M_NOECHO|IO$M_TRMNOECHO
+#ifdef MAIL
+#define TT_SPECIAL_HANDLING (TT$M_MECHTAB|TT$M_MECHFORM|TT$M_NOBRDCST)
+#define TT2_SPECIAL_HANDLING (TT2$M_BRDCSTMBX)
+#else
+#define TT_SPECIAL_HANDLING (TT$M_MECHTAB|TT$M_MECHFORM)
+#define TT2_SPECIAL_HANDLING (0)
+#endif
+#define Uword unsigned short
+#define Ubyte unsigned char
+struct _rd_iosb { /* i/o status block for read */
+ Uword status, trm_offset;
+ Uword terminator, trm_siz;
+};
+struct _wr_iosb { /* i/o status block for write */
+ Uword status, byte_cnt;
+ unsigned : 32;
+};
+struct _sm_iosb { /* i/o status block for sense-mode qio */
+ Uword status;
+ Ubyte xmt_speed, rcv_speed;
+ Ubyte cr_fill, lf_fill, parity;
+ unsigned : 8;
+};
+struct _sm_bufr { /* sense-mode characteristics buffer */
+ Ubyte class, type; /* class==DC$_TERM, type==(various) */
+ Uword buf_siz; /* aka page width */
+#define page_width buf_siz /* number of columns */
+ unsigned tt_char : 24; /* primary characteristics */
+ unsigned page_length : 8; /* number of lines */
+ unsigned tt2_char : 32; /* secondary characteristics */
+};
+static struct {
+ struct _sm_iosb io;
+ struct _sm_bufr sm;
+} sg = {{0},{0}};
+static unsigned short tt_chan = 0;
+static unsigned long tt_char_restore = 0, tt_char_active = 0,
+ tt2_char_restore = 0, tt2_char_active = 0;
+static unsigned long ctrl_mask = 0;
+
+int
+vms_getchar()
+{
+ short key;
+
+#ifdef USE_QIO_INPUT
+ struct _rd_iosb iosb;
+ unsigned long sts;
+ unsigned char kb_buf;
+
+ if (inc > 0) {
+ /* we have buffered character(s) from previous read */
+ kb_buf = *inp++;
+ --inc;
+ sts = SS$_NORMAL;
+ } else {
+ sts = sys$qiow(0, tt_chan, QIO_FUNC, &iosb, (void(*)())0, 0,
+ &kb_buf, sizeof kb_buf, 0, 0, 0, 0);
+ }
+ if (vms_ok(sts)) {
+ if (kb_buf == CTRL('C')) {
+ if (intr_char) gsignal(SIGINT);
+ key = (short)kb_buf;
+ } else if (kb_buf == '\r') { /* <return> */
+ key = (short)'\n';
+ } else if (kb_buf == ESC || kb_buf == CSI || kb_buf == SS3) {
+ switch(parse_function_key((int)kb_buf)) {
+ case SMG$K_TRM_UP: key = iflags.num_pad ? '8' : 'k'; break;
+ case SMG$K_TRM_DOWN: key = iflags.num_pad ? '2' : 'j'; break;
+ case SMG$K_TRM_LEFT: key = iflags.num_pad ? '4' : 'h'; break;
+ case SMG$K_TRM_RIGHT: key = iflags.num_pad ? '6' : 'l'; break;
+ default: key = ESC; break;
+ }
+ } else {
+ key = (short)kb_buf;
+ }
+ } else if (sts == SS$_HANGUP || iosb.status == SS$_HANGUP
+ || sts == SS$_DEVOFFLINE) {
+ gsignal(SIGHUP);
+ key = ESC;
+ } else /*(this should never happen)*/
+ key = getchar();
+
+#else /*!USE_QIO_INPUT*/
+ static volatile int recurse = 0; /* SMG is not AST re-entrant! */
+
+ if (recurse++ == 0 && kb != 0) {
+ smg$read_keystroke(&kb, &key);
+ switch (key) {
+ case SMG$K_TRM_UP: iflags.num_pad ? '8' : key = 'k'; break;
+ case SMG$K_TRM_DOWN: iflags.num_pad ? '2' : key = 'j'; break;
+ case SMG$K_TRM_LEFT: iflags.num_pad ? '4' : key = 'h'; break;
+ case SMG$K_TRM_RIGHT: iflags.num_pad ? '6' : key = 'l'; break;
+ case '\r': key = '\n'; break;
+ default: if (key > 255) key = ESC;
+ break;
+ }
+ } else {
+ /* abnormal input--either SMG didn't initialize properly or
+ vms_getchar() has been called recursively (via SIGINT handler).
+ */
+ if (kb != 0) /* must have been a recursive call */
+ smg$cancel_input(&kb); /* from an interrupt handler */
+ key = getchar();
+ }
+ --recurse;
+#endif /* USE_QIO_INPUT */
+
+ return (int)key;
+}
+
+#ifdef USE_QIO_INPUT
+ /*
+ * We've just gotten an <escape> character. Do a timed read to
+ * get any other characters, then try to parse them as an escape
+ * sequence. This isn't perfect, since there's no guarantee
+ * that a full escape sequence will be available, or even if one
+ * is, it might actually by regular input from a fast typist or
+ * a stalled input connection. {For packetized environments,
+ * cross plural(body_part(FINGER)) and hope for best. :-}
+ *
+ * This is needed to preserve compatability with SMG interface
+ * for two reasons:
+ * 1) retain support for arrow keys, and
+ * 2) treat other VTxxx function keys as <esc> for aborting
+ * various NetHack prompts.
+ * The second reason is compelling; otherwise remaining chars of
+ * an escape sequence get treated as inappropriate user commands.
+ *
+ * SMG code values for these key sequences fall in the range of
+ * 256 thru 3xx. The assignments are not particularly intuitive.
+ */
+/*=
+ -- Summary of VTxxx-style keyboards and transmitted escape sequences. --
+Keypad codes are prefixed by 7 bit (\033 O) or 8 bit SS3:
+ keypad: PF1 PF2 PF3 PF4 codes: P Q R S
+ 7 8 9 - w x y m
+ 4 5 6 . t u v n
+ 1 2 3 :en-: q r s : :
+ ...0... , :ter: ...p... l :M:
+Arrows are prefixed by either SS3 or CSI (either 7 or 8 bit), depending on
+whether the terminal is in application or numeric mode (ditto for PF keys):
+ arrows: <up> <dwn> <lft> <rgt> A B D C
+Additional function keys (vk201/vk401) generate CSI nn ~ (nn is 1 or 2 digits):
+ vk201 keys: F6 F7 F8 F9 F10 F11 F12 F13 F14 Help Do F17 F18 F19 F20
+ 'nn' digits: 17 18 19 20 21 23 24 25 26 28 29 31 32 33 34
+ alternate: ^C ^[ ^H ^J (when in VT100 mode)
+ edit keypad: <fnd> <ins> <rmv> digits: 1 2 3
+ <sel> <prv> <nxt> 4 5 6
+VT52 mode: arrows and PF keys send ESCx where x is in A-D or P-S.
+=*/
+
+static const char *arrow_or_PF = "ABCDPQRS", /* suffix char */
+ *smg_keypad_codes = "PQRSpqrstuvwxyMmlnABDC";
+ /* PF1..PF4,KP0..KP9,enter,dash,comma,dot,up-arrow,down,left,right */
+ /* Ultimate return value is (index into smg_keypad_codes[] + 256). */
+
+static short
+parse_function_key(c)
+register int c;
+{
+ struct _rd_iosb iosb;
+ unsigned long sts;
+ char seq_buf[15+1]; /* plenty room for escape sequence + slop */
+ short result = ESC; /* translate to <escape> by default */
+
+ /*
+ * Read whatever we can from type-ahead buffer (1 second timeout).
+ * If the user typed an actual <escape> to deliberately abort
+ * something, he or she should be able to tolerate the necessary
+ * restriction of a negligible pause before typing anything else.
+ * We might already have [at least some of] an escape sequence from a
+ * previous read, particularly if user holds down the arrow keys...
+ */
+ if (inc > 0) strncpy(seq_buf, inp, inc);
+ if (inc < (int)(sizeof seq_buf) - 1) {
+ sts = sys$qiow(0, tt_chan, QIO_FUNC|IO$M_TIMED, &iosb, (void(*)())0, 0,
+ seq_buf + inc, sizeof seq_buf - 1 - inc, 1, 0, 0, 0);
+ if (vms_ok(sts)) sts = iosb.status;
+ } else
+ sts = SS$_NORMAL;
+ if (vms_ok(sts) || sts == SS$_TIMEOUT) {
+ register int cnt = iosb.trm_offset + iosb.trm_siz + inc;
+ register char *p = seq_buf;
+ if (c == ESC) /* check for 7-bit vt100/ANSI, or vt52 */
+ if (*p == '[' || *p == 'O') c = META(CTRL(*p++)), cnt--;
+ else if (strchr(arrow_or_PF, *p)) c = SS3; /*CSI*/
+ if (cnt > 0 && (c == SS3 || (c == CSI && strchr(arrow_or_PF, *p)))) {
+ register char *q = strchr(smg_keypad_codes, *p);
+ if (q) result = 256 + (q - smg_keypad_codes);
+ p++, --cnt; /* one more char consumed */
+ } else if (cnt > 1 && c == CSI) {
+ static short /* "CSI nn ~" -> F_keys[nn] */
+ F_keys[35] = { ESC, /*(filler)*/
+ 311, 312, 313, 314, 315, 316, /* E1-E6 */
+ ESC, ESC, ESC, ESC, /*(more filler)*/
+ 281, 282, 283, 284, 285, ESC, /* F1-F5 */
+ 286, 287, 288, 289, 290, ESC, /* F6-F10*/
+ 291, 292, 293, 294, ESC, /*F11-F14*/
+ 295, 296, ESC, /*<help>,<do>, aka F15,F16*/
+ 297, 298, 299, 300 /*F17-F20*/
+ }; /* note: there are several missing nn in CSI nn ~ values */
+ int nn; char *q;
+ *(p + cnt) = '\0'; /* terminate string */
+ q = strchr(p, '~');
+ if (q && sscanf(p, "%d~", &nn) == 1) {
+ if (nn > 0 && nn < SIZE(F_keys)) result = F_keys[nn];
+ cnt -= (++q - p);
+ p = q;
+ }
+ }
+ if (cnt > 0) strncpy((inp = inputbuf), p, (inc = cnt));
+ else inc = 0, inp = 0;
+ }
+ return result;
+}
+#endif /* USE_QIO_INPUT */
+
+static void
+setctty()
+{
+ struct _sm_iosb iosb;
+ unsigned long status;
+
+ status = sys$qiow(0, tt_chan, IO$_SETMODE, &iosb, (void(*)())0, 0,
+ &sg.sm, sizeof sg.sm, 0, 0, 0, 0);
+ if (vms_ok(status)) status = iosb.status;
+ if (vms_ok(status)) {
+ /* try to force terminal into synch with TTDRIVER's setting */
+ number_pad((sg.sm.tt2_char & TT2$M_APP_KEYPAD) ? -1 : 1);
+ } else {
+ raw_print("");
+ errno = EVMSERR, vaxc$errno = status;
+ perror("NetHack(setctty: setmode)");
+ wait_synch();
+ }
+}
+
+static void
+resettty() /* atexit() routine */
+{
+ if (settty_needed) {
+ bombing = TRUE; /* don't clear screen; preserve traceback info */
+ settty((char *)0);
+ }
+ (void) sys$dassgn(tt_chan), tt_chan = 0;
+}
+
+/*
+ * Get initial state of terminal, set ospeed (for termcap routines)
+ * and switch off tab expansion if necessary.
+ * Called by init_nhwindows() and resume_nhwindows() in wintty.c
+ * (for initial startup and for returning from '!' or ^Z).
+ */
+void
+gettty()
+{
+ static char dev_tty[] = "TT:";
+ static $DESCRIPTOR(tty_dsc, dev_tty);
+ int err = 0;
+ unsigned long status, zero = 0;
+
+ if (tt_chan == 0) { /* do this stuff once only */
+ iflags.cbreak = OFF, iflags.echo = ON; /* until setup is complete */
+ status = sys$assign(&tty_dsc, &tt_chan, 0, 0);
+ if (!vms_ok(status)) {
+ raw_print(""), err++;
+ errno = EVMSERR, vaxc$errno = status;
+ perror("NetHack(gettty: $assign)");
+ }
+ atexit(resettty); /* register an exit handler to reset things */
+ }
+ status = sys$qiow(0, tt_chan, IO$_SENSEMODE, &sg.io, (void(*)())0, 0,
+ &sg.sm, sizeof sg.sm, 0, 0, 0, 0);
+ if (vms_ok(status)) status = sg.io.status;
+ if (!vms_ok(status)) {
+ raw_print(""), err++;
+ errno = EVMSERR, vaxc$errno = status;
+ perror("NetHack(gettty: sensemode)");
+ }
+ ospeed = sg.io.xmt_speed;
+ erase_char = '\177'; /* <rubout>, aka <delete> */
+ kill_char = CTRL('U');
+ intr_char = CTRL('C');
+ (void) lib$enable_ctrl(&zero, &ctrl_mask);
+ /* Use the systems's values for lines and columns if it has any idea. */
+ if (sg.sm.page_length)
+ LI = sg.sm.page_length;
+ if (sg.sm.page_width)
+ CO = sg.sm.page_width;
+ /* suppress tab and form-feed expansion, in case termcap uses them */
+ tt_char_restore = sg.sm.tt_char;
+ tt_char_active = sg.sm.tt_char |= TT_SPECIAL_HANDLING;
+ tt2_char_restore = sg.sm.tt2_char;
+ tt2_char_active = sg.sm.tt2_char |= TT2_SPECIAL_HANDLING;
+#if 0 /*[ defer until setftty() ]*/
+ setctty();
+#endif
+
+ if (err) wait_synch();
+}
+
+/* reset terminal to original state */
+void
+settty(s)
+const char *s;
+{
+ if (!bombing) end_screen();
+ if (s) raw_print(s);
+ disable_broadcast_trapping();
+#if 0 /* let SMG's exit handler do the cleanup (as per doc) */
+/* #ifndef USE_QIO_INPUT */
+ if (kb) smg$delete_virtual_keyboard(&kb), kb = 0;
+#endif /* 0 (!USE_QIO_INPUT) */
+ if (ctrl_mask)
+ (void) lib$enable_ctrl(&ctrl_mask, 0);
+ iflags.echo = ON;
+ iflags.cbreak = OFF;
+ /* reset original tab, form-feed, broadcast settings */
+ sg.sm.tt_char = tt_char_restore;
+ sg.sm.tt2_char = tt2_char_restore;
+ setctty();
+
+ settty_needed = FALSE;
+}
+
+/* same as settty, with no clearing of the screen */
+void
+shuttty(s)
+const char *s;
+{
+ bombing = TRUE;
+ settty(s);
+ bombing = FALSE;
+}
+
+void
+setftty()
+{
+ unsigned long mask = LIB$M_CLI_CTRLT | LIB$M_CLI_CTRLY;
+
+ (void) lib$disable_ctrl(&mask, 0);
+ if (kb == 0) { /* do this stuff once only */
+#ifdef USE_QIO_INPUT
+ kb = tt_chan;
+#else /*!USE_QIO_INPUT*/
+ smg$create_virtual_keyboard(&kb);
+#endif /*USE_QIO_INPUT*/
+ init_broadcast_trapping();
+ }
+ enable_broadcast_trapping(); /* no-op if !defined(MAIL) */
+ iflags.cbreak = (kb != 0) ? ON : OFF;
+ iflags.echo = (kb != 0) ? OFF : ON;
+ /* disable tab & form-feed expansion; prepare for broadcast trapping */
+ sg.sm.tt_char = tt_char_active;
+ sg.sm.tt2_char = tt2_char_active;
+ setctty();
+
+ start_screen();
+ settty_needed = TRUE;
+}
+
+void
+intron() /* enable kbd interupts if enabled when game started */
+{
+ intr_char = CTRL('C');
+}
+
+void
+introff() /* disable kbd interrupts if required*/
+{
+ intr_char = 0;
+}
+
+#ifdef TIMED_DELAY
+
+extern unsigned long
+ FDECL(lib$emul, (const long *,const long *,const long *,long *));
+extern unsigned long sys$schdwk(), sys$hiber();
+
+#define VMS_UNITS_PER_SECOND 10000000L /* hundreds of nanoseconds, 1e-7 */
+/* constant for conversion from milliseconds to VMS delta time (negative) */
+static const long mseconds_to_delta = VMS_UNITS_PER_SECOND / 1000L * -1L;
+
+/* sleep for specified number of milliseconds (note: the timer used
+ generally only has 10-millisecond resolution at the hardware level...) */
+void msleep(mseconds)
+unsigned mseconds; /* milliseconds */
+{
+ long pid = 0L, zero = 0L, msec, qtime[2];
+
+ msec = (long) mseconds;
+ if (msec > 0 &&
+ /* qtime{0:63} = msec{0:31} * mseconds_to_delta{0:31} + zero{0:31} */
+ vms_ok(lib$emul(&msec, &mseconds_to_delta, &zero, qtime))) {
+ /* schedule a wake-up call, then go to sleep */
+ if (vms_ok(sys$schdwk(&pid, (genericptr_t)0, qtime, (long *)0)))
+ (void)sys$hiber();
+ }
+}
+
+#endif /* TIMED_DELAY */
+
+
+/* fatal error */
+/*VARARGS1*/
+void
+error VA_DECL(const char *,s)
+ VA_START(s);
+ VA_INIT(s, const char *);
+ if(settty_needed)
+ settty((char *)0);
+ Vprintf(s,VA_ARGS);
+ (void) putchar('\n');
+ VA_END();
+ exit(EXIT_FAILURE);
+}
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