*** empty log message ***

1 files changed, 2313 insertions, 0 deletions

diff --git a/minislang/sldisply.c b/minislang/sldisply.c
new file mode 100644
index 000000000..0d3428394
--- /dev/null
+++ b/minislang/sldisply.c
@@ -0,0 +1,2313 @@
+/* Copyright (c) 1992, 1998 John E. Davis
+ * This file is part of the S-Lang library.
+ *
+ * You may distribute under the terms of either the GNU General Public
+ * License or the Perl Artistic License.
+ */
+#include "config.h"
+#include "sl-feat.h"
+
+#include <stdio.h>
+#include <string.h>
+#include <time.h>
+#include <ctype.h>
+
+#if !defined(VMS) || (__VMS_VER >= 70000000)
+# include <sys/time.h>
+# ifdef __QNX__
+#  include <sys/select.h>
+# endif
+# include <sys/types.h>
+#endif
+
+#ifdef __BEOS__
+/* Prototype for select */
+# include <net/socket.h>
+#endif
+
+#ifdef HAVE_TERMIOS_H
+# include <termios.h>
+#endif
+
+#ifdef VMS
+# include <unixlib.h>
+# include <unixio.h>
+# include <dvidef.h>
+# include <descrip.h>
+# include <lib$routines.h>
+# include <starlet.h>
+#else
+# if !defined(sun)
+#  include <sys/ioctl.h>
+# endif
+#endif
+
+#ifdef SYSV
+# include <sys/termio.h>
+# include <sys/stream.h>
+# include <sys/ptem.h>
+# include <sys/tty.h>
+#endif
+
+#if defined (_AIX) && !defined (FD_SET)
+# include <sys/select.h>	/* for FD_ISSET, FD_SET, FD_ZERO */
+#endif
+
+#include <errno.h>
+#include "slang.h"
+#include "_slang.h"
+
+#ifdef HAVE_STDLIB_H
+# include <stdlib.h>
+#endif
+
+#ifdef HAVE_UNISTD_H
+# include <unistd.h>
+#endif
+
+#if defined(__DECC) && defined(VMS)
+/* These get prototypes for write an sleep */
+# include <unixio.h>
+#endif
+#include <signal.h>
+
+/* Colors:  These definitions are used for the display.  However, the
+ * application only uses object handles which get mapped to this
+ * internal representation.  The mapping is performed by the Color_Map
+ * structure below. */
+
+#define CHAR_MASK	0x000000FF
+#define FG_MASK		0x0000FF00
+#define BG_MASK		0x00FF0000
+#define ATTR_MASK	0x1F000000
+#define BGALL_MASK	0x0FFF0000
+
+/* The 0x10000000 bit represents the alternate character set.  BGALL_MASK does
+ * not include this attribute.
+ */
+
+#define GET_FG(color) ((color & FG_MASK) >> 8)
+#define GET_BG(color) ((color & BG_MASK) >> 16)
+#define MAKE_COLOR(fg, bg) (((fg) | ((bg) << 8)) << 8)
+
+int SLtt_Screen_Cols;
+int SLtt_Screen_Rows;
+int SLtt_Term_Cannot_Insert;
+int SLtt_Term_Cannot_Scroll;
+int SLtt_Use_Ansi_Colors;
+int SLtt_Blink_Mode = 1;
+int SLtt_Use_Blink_For_ACS = 0;
+int SLtt_Newline_Ok = 0;
+int SLtt_Has_Alt_Charset = 0;
+int SLtt_Force_Keypad_Init = 0;
+
+/* -1 means unknown */
+int SLtt_Has_Status_Line = -1;	       /* hs */
+
+static int Automatic_Margins;
+/* static int No_Move_In_Standout; */
+static int Worthless_Highlight;
+#define HP_GLITCH_CODE
+#ifdef HP_GLITCH_CODE
+/* This glitch is exclusive to HP term.  Basically it means that to clear
+ * attributes, one has to erase to the end of the line.
+ */
+static int Has_HP_Glitch;
+#endif
+
+static char *Reset_Color_String;
+
+static int Linux_Console;
+
+/* It is crucial that JMAX_COLORS must be less than 128 since the high bit
+ * is used to indicate a character from the ACS (alt char set).  The exception
+ * to this rule is if SLtt_Use_Blink_For_ACS is true.  This means that of
+ * the highbit is set, we interpret that as a blink character.  This is
+ * exploited by DOSemu.
+ */
+#define JMAX_COLORS 256
+#define JNORMAL_COLOR 0
+
+typedef struct
+{
+   SLtt_Char_Type fgbg;
+   SLtt_Char_Type mono;
+   char *custom_esc;
+}
+Ansi_Color_Type;
+
+#define RGB1(r, g, b)   ((r) | ((g) << 1) | ((b) << 2))
+#define RGB(r, g, b, br, bg, bb)  ((RGB1(r, g, b) << 8) | (RGB1(br, bg, bb) << 16))
+
+static Ansi_Color_Type Ansi_Color_Map[JMAX_COLORS] =
+{
+     {RGB(1, 1, 1, 0, 0, 0), 0x00000000, NULL},   /* white/black */
+     {RGB(0, 1, 0, 0, 0, 0), SLTT_REV_MASK, NULL},   /* green/black */
+     {RGB(1, 0, 1, 0, 0, 0), SLTT_REV_MASK, NULL},   /* magenta/black */
+     {RGB(0, 1, 1, 0, 0, 0), SLTT_REV_MASK, NULL},   /* cyan/black */
+     {RGB(1, 0, 0, 0, 0, 0), SLTT_REV_MASK, NULL},
+     {RGB(0, 1, 0, 0, 0, 1), SLTT_REV_MASK, NULL},
+     {RGB(1, 0, 0, 0, 0, 1), SLTT_REV_MASK, NULL},
+     {RGB(1, 0, 0, 0, 1, 0), SLTT_REV_MASK, NULL},
+     {RGB(0, 0, 1, 1, 0, 0), SLTT_REV_MASK, NULL},
+     {RGB(0, 1, 0, 1, 0, 0), SLTT_REV_MASK, NULL},
+     {RGB(0, 1, 1, 1, 1, 1), SLTT_REV_MASK, NULL},
+     {RGB(1, 1, 0, 1, 1, 1), SLTT_REV_MASK, NULL},
+     {RGB(1, 0, 1, 1, 1, 1), SLTT_REV_MASK, NULL},
+     {RGB(0, 0, 0, 0, 1, 1), SLTT_REV_MASK, NULL},
+     {RGB(0, 1, 0, 1, 1, 1), SLTT_REV_MASK, NULL},
+     {RGB(0, 1, 0, 1, 1, 1), SLTT_REV_MASK, NULL},
+     {RGB(0, 1, 0, 1, 1, 1), SLTT_REV_MASK, NULL},
+     {RGB(0, 1, 0, 1, 1, 1), SLTT_REV_MASK, NULL}
+};
+
+static char *Color_Fg_Str;
+static char *Color_Bg_Str;
+static char *Default_Color_Fg_Str = "\033[39m";
+static char *Default_Color_Bg_Str = "\033[49m";
+
+static int Max_Terminfo_Colors = 8;	       /* termcap Co */
+
+char *SLtt_Graphics_Char_Pairs;	       /* ac termcap string -- def is vt100 */
+
+/* 1 if terminal lacks the ability to do into insert mode or into delete
+   mode. Currently controlled by S-Lang but later perhaps termcap. */
+
+static char *UnderLine_Vid_Str;
+static char *Blink_Vid_Str;
+static char *Bold_Vid_Str;
+static char *Ins_Mode_Str; /* = "\033[4h"; */   /* ins mode (im) */
+static char *Eins_Mode_Str; /* = "\033[4l"; */  /* end ins mode (ei) */
+static char *Scroll_R_Str; /* = "\033[%d;%dr"; */ /* scroll region */
+static char *Cls_Str; /* = "\033[2J\033[H"; */  /* cl termcap STR  for ansi terminals */
+static char *Rev_Vid_Str; /* = "\033[7m"; */    /* mr,so termcap string */
+static char *Norm_Vid_Str; /* = "\033[m"; */   /* me,se termcap string */
+static char *Del_Eol_Str; /* = "\033[K"; */	       /* ce */
+static char *Del_Char_Str; /* = "\033[P"; */   /* dc */
+static char *Del_N_Lines_Str; /* = "\033[%dM"; */  /* DL */
+static char *Add_N_Lines_Str; /* = "\033[%dL"; */  /* AL */
+static char *Rev_Scroll_Str;
+static char *Curs_Up_Str;
+static char *Curs_F_Str;    /* RI termcap string */
+static char *Cursor_Visible_Str;    /* ve termcap string */
+static char *Cursor_Invisible_Str;    /* vi termcap string */
+
+static char *Start_Alt_Chars_Str;  /* as */
+static char *End_Alt_Chars_Str;   /* ae */
+static char *Enable_Alt_Char_Set;  /* eA */
+
+static char *Term_Init_Str;
+static char *Keypad_Init_Str;
+static char *Term_Reset_Str;
+static char *Keypad_Reset_Str;
+
+/* status line functions */
+static char *Disable_Status_line_Str;  /* ds */
+static char *Return_From_Status_Line_Str;   /* fs */
+static char *Goto_Status_Line_Str;     /* ts */
+static int Num_Status_Line_Columns;    /* ws */
+static int Status_Line_Esc_Ok;	       /* es */
+
+/* static int Len_Curs_F_Str = 5; */
+
+/* cm string has %i%d since termcap numbers columns from 0 */
+/* char *CURS_POS_STR = "\033[%d;%df";  ansi-- hor and vert pos */
+static char *Curs_Pos_Str; /* = "\033[%i%d;%dH";*/   /* cm termcap string */
+
+/* scrolling region */
+static int Scroll_r1 = 0, Scroll_r2 = 23;
+static int Cursor_r, Cursor_c;	       /* 0 based */
+
+/* current attributes --- initialized to impossible value */
+static SLtt_Char_Type Current_Fgbg = 0xFFFFFFFFU;
+
+static int Cursor_Set;		       /* 1 if cursor position known, 0
+					* if not.  -1 if only row is known
+					*/
+
+#define MAX_OUTPUT_BUFFER_SIZE 4096
+
+static unsigned char Output_Buffer[MAX_OUTPUT_BUFFER_SIZE];
+static unsigned char *Output_Bufferp = Output_Buffer;
+
+unsigned long SLtt_Num_Chars_Output;
+
+static int sl_usleep (unsigned long usecs)
+{
+#if !defined(VMS) || (__VMS_VER >= 70000000)
+   struct timeval tv;
+   tv.tv_sec = usecs / 1000000;
+   tv.tv_usec = usecs % 1000000;
+   return select(0, NULL, NULL, NULL, &tv);
+#else
+   return 0;
+#endif
+}
+
+int SLtt_flush_output (void)
+{
+   int nwrite = 0;
+   unsigned int total;
+   int n = (int) (Output_Bufferp - Output_Buffer);
+
+   SLtt_Num_Chars_Output += n;
+
+   total = 0;
+   while (n > 0)
+     {
+	nwrite = write (fileno(stdout), (char *) Output_Buffer + total, n);
+	if (nwrite == -1)
+	  {
+	     nwrite = 0;
+#ifdef EAGAIN
+	     if (errno == EAGAIN)
+	       {
+		  sl_usleep (100000);   /* 1/10 sec */
+		  continue;
+	       }
+#endif
+#ifdef EWOULDBLOCK
+	     if (errno == EWOULDBLOCK)
+	       {
+		  sl_usleep (100000);
+		  continue;
+	       }
+#endif
+#ifdef EINTR
+	     if (errno == EINTR) continue;
+#endif
+	     break;
+	  }
+	n -= nwrite;
+	total += nwrite;
+     }
+   Output_Bufferp = Output_Buffer;
+   return n;
+}
+
+int SLtt_Baud_Rate;
+static void tt_write(char *str, unsigned int n)
+{
+   static unsigned long last_time;
+   static int total;
+   unsigned long now;
+   unsigned int ndiff;
+
+   if ((str == NULL) || (n == 0)) return;
+   total += n;
+
+   while (1)
+     {
+	ndiff = MAX_OUTPUT_BUFFER_SIZE - (int) (Output_Bufferp - Output_Buffer);
+	if (ndiff < n)
+	  {
+	     SLMEMCPY ((char *) Output_Bufferp, (char *) str, ndiff);
+	     Output_Bufferp += ndiff;
+	     SLtt_flush_output ();
+	     n -= ndiff;
+	     str += ndiff;
+	  }
+	else
+	  {
+	     SLMEMCPY ((char *) Output_Bufferp, str, n);
+	     Output_Bufferp += n;
+	     break;
+	  }
+     }
+
+   if (((SLtt_Baud_Rate > 150) && (SLtt_Baud_Rate <= 9600))
+       && (10 * total > SLtt_Baud_Rate))
+     {
+	total = 0;
+	if ((now = (unsigned long) time(NULL)) - last_time <= 1)
+	  {
+	     SLtt_flush_output ();
+	     sleep((unsigned) 1);
+	  }
+	last_time = now;
+     }
+}
+
+static void tt_write_string (char *str)
+{
+   if (str != NULL) tt_write(str, strlen(str));
+}
+
+void SLtt_write_string (char *str)
+{
+   tt_write_string (str);
+   Cursor_Set = 0;
+}
+
+void SLtt_putchar (char ch)
+{
+   SLtt_normal_video ();
+   if (Cursor_Set == 1)
+     {
+	if (ch >= ' ') Cursor_c++;
+	else if (ch == '\b') Cursor_c--;
+	else if (ch == '\r') Cursor_c = 0;
+	else Cursor_Set = 0;
+
+	if ((Cursor_c + 1 == SLtt_Screen_Cols)
+	    && Automatic_Margins) Cursor_Set = 0;
+     }
+
+   if (Output_Bufferp < Output_Buffer + MAX_OUTPUT_BUFFER_SIZE)
+     {
+	*Output_Bufferp++ = (unsigned char) ch;
+     }
+   else tt_write (&ch, 1);
+}
+
+static unsigned int tt_sprintf(char *buf, char *fmt, int x, int y)
+{
+   char *fmt_max;
+   register unsigned char *b, ch;
+   int offset;
+   int z, z1, parse_level;
+   int zero_pad;
+   int field_width;
+   int variables [26];
+   int stack [64];
+   unsigned int stack_len;
+   int parms [10];
+#define STACK_POP (stack_len ? stack[--stack_len] : 0)
+
+   if (fmt == NULL)
+     {
+	*buf = 0;
+	return 0;
+     }
+
+   stack [0] = y;	       /* pushed for termcap */
+   stack [1] = x;
+   stack_len = 2;
+
+   parms [1] = x;	       /* p1 */
+   parms [2] = y;	       /* p2 */
+
+   offset = 0;
+   zero_pad = 0;
+   field_width = 0;
+
+   b = (unsigned char *) buf;
+   fmt_max = fmt + strlen (fmt);
+
+   while (fmt < fmt_max)
+     {
+	ch = *fmt++;
+
+	if (ch != '%')
+	  {
+	     *b++ = ch;
+	     continue;
+	  }
+
+	if (fmt == fmt_max) break;
+	ch = *fmt++;
+
+	switch (ch)
+	  {
+	   default:
+	     *b++ = ch;
+	     break;
+
+	   case 'p':
+
+	     if (fmt == fmt_max) break;
+	     ch = *fmt++;
+	     if ((ch >= '0') && (ch <= '9'))
+	       stack [stack_len++] = parms [ch - '0'];
+	     break;
+
+	   case '\'':   /* 'x' */
+	     if (fmt == fmt_max) break;
+	     stack [stack_len++] = *fmt++;
+	     if (fmt < fmt_max) fmt++;     /* skip ' */
+	     break;
+
+	   case '{':	       /* literal constant, e.g. {30} */
+	     z = 0;
+	     while ((fmt < fmt_max) && ((ch = *fmt) <= '9') && (ch >= '0'))
+	       {
+		  z = z * 10 + (ch - '0');
+		  fmt++;
+	       }
+	     stack [stack_len++] = z;
+	     if ((ch == '}') && (fmt < fmt_max)) fmt++;
+	     break;
+
+	   case '0':
+	     if (fmt == fmt_max) break;
+	     ch = *fmt;
+	     if ((ch != '2') && (ch != '3'))
+	       break;
+	     zero_pad = 1;
+	     fmt++;
+	     /* drop */
+
+	   case '2':
+	   case '3':
+	     if (fmt == fmt_max)
+	     if (*fmt == 'x')
+	       {
+		  char x_fmt_buf [4];
+		  char *x_fmt_buf_ptr;
+
+		  x_fmt_buf_ptr = x_fmt_buf;
+		  if (zero_pad) *x_fmt_buf_ptr++ = '0';
+		  *x_fmt_buf_ptr++ = ch;
+		  *x_fmt_buf_ptr++ = 'X';
+		  *x_fmt_buf_ptr = 0;
+
+		  z = STACK_POP;
+		  z += offset;
+
+		  sprintf ((char *)b, x_fmt_buf, z);
+		  b += strlen ((char *)b);
+		  zero_pad = 0;
+		  break;
+	       }
+
+	     field_width = (ch - '0');
+		  /* drop */
+
+	   case 'd':
+	     z = STACK_POP;
+	     z += offset;
+	     if (z >= 100)
+	       {
+		  *b++ = z / 100 + '0';
+		  z = z % 100;
+		  zero_pad = 1;
+		  field_width = 2;
+	       }
+	     else if (zero_pad && (field_width == 3))
+	       *b++ = '0';
+
+	     if (z >= 10)
+	       {
+		  *b++ = z / 10 + '0';
+		  z = z % 10;
+	       }
+	     else if (zero_pad && (field_width >= 2))
+	       *b++ = '0';
+
+	     *b++ = z + '0';
+	     field_width = zero_pad = 0;
+	     break;
+
+	   case 'x':
+	     z = STACK_POP;
+	     z += offset;
+	     sprintf ((char *) b, "%X", z);
+	     b += strlen ((char *)b);
+	     break;
+
+	   case 'i':
+	     offset = 1;
+	     break;
+
+	   case '+':
+	     /* Handling this depends upon whether or not we are parsing
+	      * terminfo.  Terminfo requires the stack so use it as an
+	      * indicator.
+	      */
+	     if (stack_len > 2)
+	       {
+		  z = STACK_POP;
+		  stack [stack_len - 1] += z;
+	       }
+	     else if (fmt < fmt_max)
+	       {
+		  ch = *fmt++;
+		  if ((unsigned char) ch == 128) ch = 0;
+		  ch = ch + (unsigned char) STACK_POP;
+		  if (ch == '\n') ch++;
+		  *b++ = ch;
+	       }
+	     break;
+
+	     /* Binary operators */
+	   case '-':
+	   case '*':
+	   case '/':
+	   case 'm':
+	   case '&':
+	   case '|':
+	   case '^':
+	   case '=':
+	   case '>':
+	   case '<':
+	   case 'A':
+	   case 'O':
+	     z1 = STACK_POP;
+	     z = STACK_POP;
+	     switch (ch)
+	       {
+		case '-': z = (z - z1); break;
+		case '*': z = (z * z1); break;
+		case '/': z = (z / z1); break;
+		case 'm': z = (z % z1); break;
+		case '&': z = (z & z1); break;
+		case '|': z = (z | z1); break;
+		case '^': z = (z ^ z1); break;
+		case '=': z = (z == z1); break;
+		case '>': z = (z > z1); break;
+		case '<': z = (z < z1); break;
+		case 'A': z = (z && z1); break;
+		case 'O': z = (z || z1); break;
+	       }
+	     stack [stack_len++] = z;
+	     break;
+
+	     /* unary */
+	   case '!':
+	     z = STACK_POP;
+	     stack [stack_len++] = !z;
+	     break;
+
+	   case '~':
+	     z = STACK_POP;
+	     stack [stack_len++] = ~z;
+	     break;
+
+	   case 'r':		       /* termcap -- swap parameters */
+	     z = stack [0];
+	     stack [0] = stack [1];
+	     stack [1] = z;
+	     break;
+
+	   case '.':		       /* termcap */
+	   case 'c':
+	     ch = (unsigned char) STACK_POP;
+	     if (ch == '\n') ch++;
+	     *b++ = ch;
+	     break;
+
+	   case 'g':
+	     if (fmt == fmt_max) break;
+	     ch = *fmt++;
+	     if ((ch >= 'a') && (ch <= 'z'))
+	       stack [stack_len++] = variables [ch - 'a'];
+	     break;
+
+	   case 'P':
+	     if (fmt == fmt_max) break;
+	     ch = *fmt++;
+	     if ((ch >= 'a') && (ch <= 'z'))
+	       variables [ch - 'a'] = STACK_POP;
+	     break;
+
+	     /* If then else parsing.  Actually, this is rather easy.  The
+	      * key is to notice that 'then' does all the work.  'if' simply
+	      * there to indicate the start of a test and endif indicates
+	      * the end of tests.  If 'else' is seen, then skip to
+	      * endif.
+	      */
+	   case '?':		       /* if */
+	   case ';':		       /* endif */
+	     break;
+
+	   case 't':		       /* then */
+	     z = STACK_POP;
+	     if (z != 0)
+	       break;		       /* good.  Continue parsing. */
+
+	     /* z == 0 and test has failed.  So, skip past this entire if
+	      * expression to the matching else or matching endif.
+	      */
+	     /* drop */
+	   case 'e':		       /* else */
+
+	     parse_level = 0;
+	     while (fmt < fmt_max)
+	       {
+		  unsigned char ch1;
+
+		  ch1 = *fmt++;
+		  if ((ch1 != '%') || (fmt == fmt_max))
+		    continue;
+
+		  ch1 = *fmt++;
+
+		  if (ch1 == '?') parse_level++;   /* new if */
+		  else if (ch1 == 'e')
+		    {
+		       if ((ch != 'e') && (parse_level == 0))
+			 break;
+		    }
+		  else if (ch1 == ';')
+		    {
+		       if (parse_level == 0)
+			 break;
+		       parse_level--;
+		    }
+	       }
+	     break;
+	  }
+     }
+   *b = 0;
+   return (unsigned int) (b - (unsigned char *) buf);
+}
+
+static void tt_printf(char *fmt, int x, int y)
+{
+   char buf[1024];
+   unsigned int n;
+   if (fmt == NULL) return;
+   n = tt_sprintf(buf, fmt, x, y);
+   tt_write(buf, n);
+}
+
+void SLtt_set_scroll_region (int r1, int r2)
+{
+   Scroll_r1 = r1;
+   Scroll_r2 = r2;
+   tt_printf (Scroll_R_Str, Scroll_r1, Scroll_r2);
+   Cursor_Set = 0;
+}
+
+void SLtt_reset_scroll_region (void)
+{
+   SLtt_set_scroll_region(0, SLtt_Screen_Rows - 1);
+}
+
+int SLtt_set_cursor_visibility (int show)
+{
+   if ((Cursor_Visible_Str == NULL) || (Cursor_Invisible_Str == NULL))
+     return -1;
+
+   tt_write_string (show ? Cursor_Visible_Str : Cursor_Invisible_Str);
+   return 0;
+}
+
+/* the goto_rc function moves to row relative to scrolling region */
+void SLtt_goto_rc(int r, int c)
+{
+   char *s = NULL;
+   int n;
+   char buf[6];
+
+   if ((c < 0) || (r < 0))
+     {
+	Cursor_Set = 0;
+	return;
+     }
+
+   /* if (No_Move_In_Standout && Current_Fgbg) SLtt_normal_video (); */
+   r += Scroll_r1;
+
+   if ((Cursor_Set > 0) || ((Cursor_Set < 0) && !Automatic_Margins))
+     {
+	n = r - Cursor_r;
+	if ((n == -1) && (Cursor_Set > 0) && (Cursor_c == c)
+	    && (Curs_Up_Str != NULL))
+	  {
+	     s = Curs_Up_Str;
+	  }
+	else if ((n >= 0) && (n <= 4))
+	  {
+	     if ((n == 0) && (Cursor_Set == 1)
+		 && ((c > 1) || (c == Cursor_c)))
+	       {
+		  if (Cursor_c == c) return;
+		  if (Cursor_c == c + 1)
+		    {
+		       s = buf;
+		       *s++ = '\b'; *s = 0;
+		       s = buf;
+		    }
+	       }
+	     else if (c == 0)
+	       {
+		  s = buf;
+		  if ((Cursor_Set != 1) || (Cursor_c != 0)) *s++ = '\r';
+		  while (n--) *s++ = '\n';
+#ifdef VMS
+		  /* Need to add this after \n to start a new record.  Sheesh. */
+		  *s++ = '\r';
+#endif
+		  *s = 0;
+		  s = buf;
+	       }
+	     /* Will fail on VMS */
+#ifndef VMS
+	     else if (SLtt_Newline_Ok && (Cursor_Set == 1) &&
+		      (Cursor_c >= c) && (c + 3 > Cursor_c))
+	       {
+		  s = buf;
+		  while (n--) *s++ = '\n';
+		  n = Cursor_c - c;
+		  while (n--) *s++ = '\b';
+		  *s = 0;
+		  s = buf;
+	       }
+#endif
+	  }
+     }
+   if (s != NULL) tt_write_string(s);
+   else tt_printf(Curs_Pos_Str, r, c);
+   Cursor_c = c; Cursor_r = r;
+   Cursor_Set = 1;
+}
+
+void SLtt_begin_insert (void)
+{
+   tt_write_string(Ins_Mode_Str);
+}
+
+void SLtt_end_insert (void)
+{
+   tt_write_string(Eins_Mode_Str);
+}
+
+void SLtt_delete_char (void)
+{
+   SLtt_normal_video ();
+   tt_write_string(Del_Char_Str);
+}
+
+void SLtt_erase_line (void)
+{
+   tt_write_string("\r");
+   Cursor_Set = 1; Cursor_c = 0;
+   SLtt_del_eol();
+}
+
+/* It appears that the Linux console, and most likely others do not
+ * like scrolling regions that consist of one line.  So I have to
+ * resort to this stupidity to make up for that stupidity.
+ */
+static void delete_line_in_scroll_region (void)
+{
+   SLtt_goto_rc (Cursor_r - Scroll_r1, 0);
+   SLtt_del_eol ();
+}
+
+void SLtt_delete_nlines (int n)
+{
+   int r1, curs;
+   char buf[132];
+
+   if (n <= 0) return;
+   SLtt_normal_video ();
+   
+   if (Scroll_r1 == Scroll_r2)
+     {
+	delete_line_in_scroll_region ();
+	return;
+     }
+   
+   if (Del_N_Lines_Str != NULL) tt_printf(Del_N_Lines_Str,n, 0);
+   else
+   /* get a new terminal */
+     {
+	r1 = Scroll_r1;
+	curs = Cursor_r;
+	SLtt_set_scroll_region(curs, Scroll_r2);
+	SLtt_goto_rc(Scroll_r2 - Scroll_r1, 0);
+	SLMEMSET(buf, '\n', (unsigned int) n);
+	tt_write(buf, (unsigned int) n);
+	/* while (n--) tt_putchar('\n'); */
+	SLtt_set_scroll_region(r1, Scroll_r2);
+	SLtt_goto_rc(curs, 0);
+     }
+}
+
+void SLtt_cls (void)
+{
+   SLtt_normal_video();
+   SLtt_reset_scroll_region ();
+   tt_write_string(Cls_Str);
+}
+
+void SLtt_reverse_index (int n)
+{
+   if (!n) return;
+
+   SLtt_normal_video();
+
+   if (Scroll_r1 == Scroll_r2)
+     {
+	delete_line_in_scroll_region ();
+	return;
+     }
+
+   if (Add_N_Lines_Str != NULL) tt_printf(Add_N_Lines_Str,n, 0);
+   else
+     {
+	while(n--) tt_write_string(Rev_Scroll_Str);
+     }
+}
+
+int SLtt_Ignore_Beep = 1;
+static char *Visible_Bell_Str;
+
+void SLtt_beep (void)
+{
+   if (SLtt_Ignore_Beep & 0x1) SLtt_putchar('\007');
+
+   if (SLtt_Ignore_Beep & 0x2)
+     {
+	if (Visible_Bell_Str != NULL) tt_write_string (Visible_Bell_Str);
+#ifdef __linux__
+	else if (Linux_Console)
+	  {
+	     tt_write_string ("\033[?5h");
+	     SLtt_flush_output ();
+	     sl_usleep (50000);
+	     tt_write_string ("\033[?5l");
+	  }
+#endif
+     }
+   SLtt_flush_output ();
+}
+
+void SLtt_del_eol (void)
+{
+   if (Current_Fgbg != 0xFFFFFFFFU) SLtt_normal_video ();
+   tt_write_string(Del_Eol_Str);
+}
+
+typedef struct
+{
+   char *name;
+   SLtt_Char_Type color;
+}
+Color_Def_Type;
+
+#define MAX_COLOR_NAMES 17
+static Color_Def_Type Color_Defs [MAX_COLOR_NAMES] =
+{
+     {"black",		SLSMG_COLOR_BLACK},
+     {"red",		SLSMG_COLOR_RED},
+     {"green",		SLSMG_COLOR_GREEN},
+     {"brown",		SLSMG_COLOR_BROWN},
+     {"blue",		SLSMG_COLOR_BLUE},
+     {"magenta",	SLSMG_COLOR_MAGENTA},
+     {"cyan",		SLSMG_COLOR_CYAN},
+     {"lightgray",	SLSMG_COLOR_LGRAY},
+     {"gray",		SLSMG_COLOR_GRAY},
+     {"brightred",	SLSMG_COLOR_BRIGHT_RED},
+     {"brightgreen",	SLSMG_COLOR_BRIGHT_GREEN},
+     {"yellow",		SLSMG_COLOR_BRIGHT_BROWN},
+     {"brightblue",	SLSMG_COLOR_BRIGHT_BLUE},
+     {"brightmagenta",	SLSMG_COLOR_BRIGHT_CYAN},
+     {"brightcyan",	SLSMG_COLOR_BRIGHT_MAGENTA},
+     {"white",		SLSMG_COLOR_BRIGHT_WHITE},
+#define SLSMG_COLOR_DEFAULT 0xFF
+     {"default",		SLSMG_COLOR_DEFAULT}
+};
+
+void SLtt_set_mono (int obj, char *what, SLtt_Char_Type mask)
+{
+   (void) what;
+   if ((obj < 0) || (obj >= JMAX_COLORS))
+     {
+	return;
+     }
+   Ansi_Color_Map[obj].mono = mask & ATTR_MASK;
+}
+
+static char *check_color_for_digit_form (char *color)
+{
+   unsigned int i, ich;
+   char *s = color;
+
+   i = 0;
+   while ((ich = (int) *s) != 0)
+     {
+	if ((ich < '0') || (ich > '9'))
+	  return color;
+
+	i = i * 10 + (ich - '0');
+	s++;
+     }
+
+   if (i < MAX_COLOR_NAMES)
+     color = Color_Defs[i].name;
+
+   return color;
+}
+
+static int get_default_colors (char **fgp, char **bgp)
+{
+   static char fg_buf[16], bg_buf[16], *bg, *fg;
+   static int already_parsed;
+   char *p, *pmax;
+
+   if (already_parsed == -1)
+     return -1;
+
+   if (already_parsed)
+     {
+	*fgp = fg;
+	*bgp = bg;
+	return 0;
+     }
+
+   already_parsed = -1;
+
+   bg = getenv ("COLORFGBG");
+
+   if (bg == NULL)
+     {
+	bg = getenv ("DEFAULT_COLORS");
+	if (bg == NULL)
+	  return -1;
+     }
+
+   p = fg_buf;
+   pmax = p + (sizeof (fg_buf) - 1);
+
+   while ((*bg != 0) && (*bg != ';'))
+     {
+	if (p < pmax) *p++ = *bg;
+	bg++;
+     }
+   *p = 0;
+
+   if (*bg) bg++;
+
+   p = bg_buf;
+   pmax = p + (sizeof (bg_buf) - 1);
+
+   /* Mark suggested allowing for extra spplication specific stuff following
+    * the background color.  That is what the check for the semi-colon is for.
+    */
+   while ((*bg != 0) && (*bg != ';'))
+     {
+	if (p < pmax) *p++ = *bg;
+	bg++;
+     }
+   *p = 0;
+
+   if (!strcmp (fg_buf, "default") || !strcmp(bg_buf, "default"))
+     {
+	*fgp = *bgp = fg = bg = "default";
+     }
+   else
+     {
+	*fgp = fg = check_color_for_digit_form (fg_buf);
+	*bgp = bg = check_color_for_digit_form (bg_buf);
+     }
+   already_parsed = 1;
+   return 0;
+}
+
+static unsigned char FgBg_Stats[JMAX_COLORS];
+
+static int Color_0_Modified = 0;
+
+void SLtt_set_color_object (int obj, SLtt_Char_Type attr)
+{
+   char *cust_esc;
+
+   if ((obj < 0) || (obj >= JMAX_COLORS)) return;
+
+   cust_esc = Ansi_Color_Map[obj].custom_esc;
+   if (cust_esc != NULL)
+     {
+	SLfree (cust_esc);
+	FgBg_Stats[(Ansi_Color_Map[obj].fgbg >> 8) & 0x7F] -= 1;
+	Ansi_Color_Map[obj].custom_esc = NULL;
+     }
+
+   Ansi_Color_Map[obj].fgbg = attr;
+   if (obj == 0) Color_0_Modified = 1;
+}
+
+SLtt_Char_Type SLtt_get_color_object (int obj)
+{
+   if ((obj < 0) || (obj >= JMAX_COLORS)) return 0;
+   return Ansi_Color_Map[obj].fgbg;
+}
+
+void SLtt_add_color_attribute (int obj, SLtt_Char_Type attr)
+{
+   if ((obj < 0) || (obj >= JMAX_COLORS)) return;
+
+   Ansi_Color_Map[obj].fgbg |= (attr & ATTR_MASK);
+   if (obj == 0) Color_0_Modified = 1;
+}
+
+static SLtt_Char_Type fb_to_fgbg (SLtt_Char_Type f, SLtt_Char_Type b)
+{
+   SLtt_Char_Type attr;
+
+   if (Max_Terminfo_Colors != 8)
+     {
+	if (f != SLSMG_COLOR_DEFAULT) f %= Max_Terminfo_Colors;
+	if (b != SLSMG_COLOR_DEFAULT) b %= Max_Terminfo_Colors;
+	return ((f << 8) | (b << 16));
+     }
+
+   /* Otherwise we have 8 ansi colors.  Try to get bright versions
+    * by using the BOLD and BLINK attributes.
+    */
+
+   attr = 0;
+
+   /* Note:  If f represents default, it will have the value 0xFF */
+   if (f != SLSMG_COLOR_DEFAULT)
+     {
+	if (f & 0x8) attr = SLTT_BOLD_MASK;
+	f &= 0x7;
+     }
+
+   if (b != SLSMG_COLOR_DEFAULT)
+     {
+	if (b & 0x8) attr |= SLTT_BLINK_MASK;
+	b &= 0x7;
+     }
+
+   return ((f << 8) | (b << 16) | attr);
+}
+
+/* This looks for colors with name form 'colorN'.  If color is of this
+ * form, N is passed back via paramter list.
+ */
+static int parse_color_digit_name (char *color, SLtt_Char_Type *f)
+{
+   unsigned int i;
+   unsigned char ch;
+
+   if (strncmp (color, "color", 5))
+     return -1;
+
+   color += 5;
+   if (*color == 0)
+     return -1;
+
+   i = 0;
+   while (1)
+     {
+	ch = (unsigned char) *color++;
+	if (ch == 0)
+	  break;
+	if ((ch > '9') || (ch < '0'))
+	  return -1;
+	i = 10 * i + (ch - '0');
+     }
+
+   *f = (SLtt_Char_Type) i;
+   return 0;
+}
+
+static int make_color_fgbg (char *fg, char *bg, SLtt_Char_Type *fgbg)
+{
+   SLtt_Char_Type f = 0xFFFFFFFFU, b = 0xFFFFFFFFU;
+   char *dfg, *dbg;
+   unsigned int i;
+
+   if ((fg != NULL) && (*fg == 0)) fg = NULL;
+   if ((bg != NULL) && (*bg == 0)) bg = NULL;
+
+   if ((fg == NULL) || (bg == NULL))
+     {
+	if (-1 == get_default_colors (&dfg, &dbg))
+	  return -1;
+
+	if (fg == NULL) fg = dfg;
+	if (bg == NULL) bg = dbg;
+     }
+
+   if (-1 == parse_color_digit_name (fg, &f))
+     {
+	for (i = 0; i < MAX_COLOR_NAMES; i++)
+	  {
+	     if (strcmp(fg, Color_Defs[i].name)) continue;
+	     f = Color_Defs[i].color;
+	     break;
+	  }
+     }
+
+   if (-1 == parse_color_digit_name (bg, &b))
+     {
+	for (i = 0; i < MAX_COLOR_NAMES; i++)
+	  {
+	     if (strcmp(bg, Color_Defs[i].name)) continue;
+	     b = Color_Defs[i].color;
+	     break;
+	  }
+     }
+
+   if ((f == 0xFFFFFFFFU) || (b == 0xFFFFFFFFU))
+     return -1;
+
+   *fgbg = fb_to_fgbg (f, b);
+   return 0;
+}
+
+void SLtt_set_color (int obj, char *what, char *fg, char *bg)
+{
+   SLtt_Char_Type fgbg;
+
+   (void) what;
+   if ((obj < 0) || (obj >= JMAX_COLORS))
+     return;
+
+   if (-1 != make_color_fgbg (fg, bg, &fgbg))
+     SLtt_set_color_object (obj, fgbg);
+}
+
+void SLtt_set_color_fgbg (int obj, SLtt_Char_Type f, SLtt_Char_Type b)
+{
+   SLtt_set_color_object (obj, fb_to_fgbg (f, b));
+}
+
+void SLtt_set_color_esc (int obj, char *esc)
+{
+   char *cust_esc;
+   SLtt_Char_Type fgbg = 0;
+   int i;
+
+   if ((obj < 0) || (obj >= JMAX_COLORS))
+     {
+	return;
+     }
+
+   cust_esc = Ansi_Color_Map[obj].custom_esc;
+   if (cust_esc != NULL)
+     {
+	SLfree (cust_esc);
+	FgBg_Stats[(Ansi_Color_Map[obj].fgbg >> 8) & 0x7F] -= 1;
+     }
+
+   cust_esc = (char *) SLmalloc (strlen(esc) + 1);
+   if (cust_esc != NULL) strcpy (cust_esc, esc);
+
+   Ansi_Color_Map[obj].custom_esc = cust_esc;
+   if (cust_esc == NULL) fgbg = 0;
+   else
+     {
+	/* The whole point of this is to generate a unique fgbg */
+	for (i = 0; i < JMAX_COLORS; i++)
+	  {
+	     if (FgBg_Stats[i] == 0) fgbg = i;
+
+	     if (obj == i) continue;
+	     if ((Ansi_Color_Map[i].custom_esc) == NULL) continue;
+	     if (!strcmp (Ansi_Color_Map[i].custom_esc, cust_esc))
+	       {
+		  fgbg = (Ansi_Color_Map[i].fgbg >> 8) & 0x7F;
+		  break;
+	       }
+	  }
+	FgBg_Stats[fgbg] += 1;
+     }
+
+   fgbg |= 0x80;
+   Ansi_Color_Map[obj].fgbg = (fgbg | (fgbg << 8)) << 8;
+   if (obj == 0) Color_0_Modified = 1;
+}
+
+void SLtt_set_alt_char_set (int i)
+{
+   static int last_i;
+   if (SLtt_Has_Alt_Charset == 0) return;
+   if (i == last_i) return;
+   tt_write_string (i ? Start_Alt_Chars_Str : End_Alt_Chars_Str );
+   last_i = i;
+}
+
+static void write_attributes (SLtt_Char_Type fgbg)
+{
+   int bg0, fg0;
+
+   if (Worthless_Highlight) return;
+   if (fgbg == Current_Fgbg) return;
+
+   /* Before spitting out colors, fix attributes */
+   if ((fgbg & ATTR_MASK) != (Current_Fgbg & ATTR_MASK))
+     {
+	if (Current_Fgbg & ATTR_MASK)
+	  {
+	     tt_write_string(Norm_Vid_Str);
+	     /* In case normal video turns off ALL attributes: */
+	     if (fgbg & SLTT_ALTC_MASK)
+	       Current_Fgbg &= ~SLTT_ALTC_MASK;
+	     SLtt_set_alt_char_set (0);
+	  }
+
+	if ((fgbg & SLTT_ALTC_MASK)
+	    != (Current_Fgbg & SLTT_ALTC_MASK))
+	  {
+	     SLtt_set_alt_char_set ((int) (fgbg & SLTT_ALTC_MASK));
+	  }
+
+	if (fgbg & SLTT_ULINE_MASK) tt_write_string (UnderLine_Vid_Str);
+	if (fgbg & SLTT_BOLD_MASK) SLtt_bold_video ();
+	if (fgbg & SLTT_REV_MASK) tt_write_string (Rev_Vid_Str);
+	if (fgbg & SLTT_BLINK_MASK)
+	  {
+	     /* Someday Linux will have a blink mode that set high intensity
+	      * background.  Lets be prepared.
+	      */
+	     if (SLtt_Blink_Mode) tt_write_string (Blink_Vid_Str);
+	  }
+     }
+
+   if (SLtt_Use_Ansi_Colors)
+     {
+	fg0 = (int) GET_FG(fgbg);
+	bg0 = (int) GET_BG(fgbg);
+
+	if (fg0 == SLSMG_COLOR_DEFAULT)
+	  tt_write_string (Default_Color_Fg_Str);
+	else
+	  tt_printf (Color_Fg_Str, fg0, 0);
+
+	if (bg0 == SLSMG_COLOR_DEFAULT)
+	  tt_write_string (Default_Color_Bg_Str);
+	else
+	  tt_printf (Color_Bg_Str, bg0, 0);
+     }
+   Current_Fgbg = fgbg;
+}
+
+static int Video_Initialized;
+
+void SLtt_reverse_video (int color)
+{
+   SLtt_Char_Type fgbg;
+   char *esc;
+
+   if (Worthless_Highlight) return;
+   if ((color < 0) || (color >= JMAX_COLORS)) return;
+
+   if (Video_Initialized == 0)
+     {
+	if (color == JNORMAL_COLOR)
+	  {
+	     tt_write_string (Norm_Vid_Str);
+	  }
+	else tt_write_string (Rev_Vid_Str);
+	Current_Fgbg = 0xFFFFFFFFU;
+	return;
+     }
+
+   if (SLtt_Use_Ansi_Colors)
+     {
+	fgbg = Ansi_Color_Map[color].fgbg;
+	if ((esc = Ansi_Color_Map[color].custom_esc) != NULL)
+	  {
+	     if (fgbg != Current_Fgbg)
+	       {
+		  Current_Fgbg = fgbg;
+		  tt_write_string (esc);
+		  return;
+	       }
+	  }
+     }
+   else fgbg = Ansi_Color_Map[color].mono;
+
+   if (fgbg == Current_Fgbg) return;
+   write_attributes (fgbg);
+}
+
+void SLtt_normal_video (void)
+{
+   SLtt_reverse_video(JNORMAL_COLOR);
+}
+
+void SLtt_narrow_width (void)
+{
+   tt_write_string("\033[?3l");
+}
+
+void SLtt_wide_width (void)
+{
+   tt_write_string("\033[?3h");
+}
+
+/* Highest bit represents the character set. */
+#define COLOR_MASK 0x7F00
+
+#define COLOR_OF(x) (((unsigned int)(x) & COLOR_MASK) >> 8)
+/*
+#define COLOR_EQS(a, b) \
+   (Ansi_Color_Map[COLOR_OF(a)].fgbg == Ansi_Color_Map[COLOR_OF(b)].fgbg)
+*/
+
+#define COLOR_EQS(a, b) \
+   (SLtt_Use_Ansi_Colors \
+    ? (Ansi_Color_Map[COLOR_OF(a)].fgbg == Ansi_Color_Map[COLOR_OF(b)].fgbg)\
+    :  (Ansi_Color_Map[COLOR_OF(a)].mono == Ansi_Color_Map[COLOR_OF(b)].mono))
+
+#define CHAR_EQS(a, b) (((a) == (b))\
+			|| ((((a) & ~COLOR_MASK) == ((b) & ~COLOR_MASK))\
+			    && COLOR_EQS((a), (b))))
+
+/* The whole point of this routine is to prevent writing to the last column
+ * and last row on terminals with automatic margins.
+ */
+static void write_string_with_care (char *str)
+{
+   unsigned int len;
+
+   if (str == NULL) return;
+
+   len = strlen (str);
+   if (Automatic_Margins && (Cursor_r + 1 == SLtt_Screen_Rows))
+     {
+	if (len + (unsigned int) Cursor_c >= (unsigned int) SLtt_Screen_Cols)
+	  {
+	     /* For now, just do not write there.  Later, something more
+	      * sophisticated will be implemented.
+	      */
+	     if (SLtt_Screen_Cols > Cursor_c)
+	       len = SLtt_Screen_Cols - Cursor_c - 1;
+	     else len = 0;
+	  }
+     }
+   tt_write (str, len);
+}
+
+static void send_attr_str (unsigned short *s)
+{
+   unsigned char out[256], ch, *p;
+   register SLtt_Char_Type attr;
+   register unsigned short sh;
+   int color, last_color = -1;
+
+   p = out;
+   while (0 != (sh = *s++))
+     {
+	ch = sh & 0xFF;
+	color = ((int) sh & 0xFF00) >> 8;
+	if (color != last_color)
+	  {
+	     if (SLtt_Use_Ansi_Colors) attr = Ansi_Color_Map[color & 0x7F].fgbg;
+	     else attr = Ansi_Color_Map[color & 0x7F].mono;
+
+	     if (sh & 0x8000) /* alternate char set */
+	       {
+		  if (SLtt_Use_Blink_For_ACS)
+		    {
+		       if (SLtt_Blink_Mode) attr |= SLTT_BLINK_MASK;
+		    }
+		  else attr |= SLTT_ALTC_MASK;
+	       }
+
+	     if (attr != Current_Fgbg)
+	       {
+		  if ((ch != ' ') ||
+		      /* it is a space so only consider it different if it
+		       * has different attributes.
+		       */
+		      (attr & BGALL_MASK) != (Current_Fgbg & BGALL_MASK))
+		    {
+		       if (p != out)
+			 {
+			    *p = 0;
+			    write_string_with_care ((char *) out);
+			    Cursor_c += (int) (p - out);
+			    p = out;
+			 }
+
+		       if (SLtt_Use_Ansi_Colors && (NULL != Ansi_Color_Map[color & 0x7F].custom_esc))
+			 {
+			    tt_write_string (Ansi_Color_Map[color & 0x7F].custom_esc);
+			    /* Just in case the custom escape sequence screwed up
+			     * the alt character set state...
+			     */
+	                    if ((attr & SLTT_ALTC_MASK) != (Current_Fgbg & SLTT_ALTC_MASK))
+			      SLtt_set_alt_char_set ((int) (attr & SLTT_ALTC_MASK));
+			    Current_Fgbg = attr;
+			 }
+		       else write_attributes (attr);
+
+		       last_color = color;
+		    }
+	       }
+	  }
+	*p++ = ch;
+     }
+   *p = 0;
+   if (p != out) write_string_with_care ((char *) out);
+   Cursor_c += (int) (p - out);
+}
+
+static void forward_cursor (unsigned int n, int row)
+{
+   char buf [1024];
+
+   if (n <= 4)
+     {
+	SLtt_normal_video ();
+	SLMEMSET (buf, ' ', n);
+	buf[n] = 0;
+	write_string_with_care (buf);
+	Cursor_c += n;
+     }
+   else if (Curs_F_Str != NULL)
+     {
+	Cursor_c += n;
+	n = tt_sprintf(buf, Curs_F_Str, (int) n, 0);
+	tt_write(buf, n);
+     }
+   else SLtt_goto_rc (row, (int) (Cursor_c + n));
+}
+
+#define SPACE_CHAR (0x20 | (JNORMAL_COLOR << 8))
+
+void SLtt_smart_puts(unsigned short *neww, unsigned short *oldd, int len, int row)
+{
+   register unsigned short *p, *q, *qmax, *pmax, *buf;
+   unsigned short buffer[256];
+   unsigned int n_spaces;
+   unsigned short *space_match, *last_buffered_match;
+#ifdef HP_GLITCH_CODE
+   int handle_hp_glitch = 0;
+#endif
+
+   q = oldd; p = neww;
+   qmax = oldd + len;
+   pmax = p + len;
+
+   /* Find out where to begin --- while they match, we are ok */
+   while (1)
+     {
+	if (q == qmax) return;
+#if SLANG_HAS_KANJI_SUPPORT
+	if (*p & 0x80)
+	  { /* new is kanji */
+	     if ((*q & 0x80) && ((q + 1) < qmax))
+	       { /* old is also kanji */
+		  if (((0xFF & *q) != (0xFF & *p))
+		      || ((0xFF & q[1]) != (0xFF & p[1])))
+		    break; /* both kanji, but not match */
+
+		  else
+		    { /* kanji match ! */
+		       if (!COLOR_EQS(*q, *p)) break;
+		       q++; p++;
+		       if (!COLOR_EQS(*q, *p)) break;
+		       /* really match! */
+		       q++; p++;
+		       continue;
+		    }
+	       }
+	     else break; /* old is not kanji */
+	  }
+	else
+	  { /* new is not kanji */
+	     if (*q & 0x80) break; /* old is kanji */
+	  }
+#endif
+	if (!CHAR_EQS(*q, *p)) break;
+	q++; p++;
+     }
+
+   /*position the cursor */
+   SLtt_goto_rc (row, (int) (p - neww));
+
+#ifdef HP_GLITCH_CODE
+   if (Has_HP_Glitch)
+     {
+	unsigned short *qq = q;
+	while (qq < qmax)
+	  {
+	     if (*qq & 0xFF00)
+	       {
+		  SLtt_normal_video ();
+		  SLtt_del_eol ();
+		  qmax = q;
+		  handle_hp_glitch = 1;
+		  break;
+	       }
+	     qq++;
+	  }
+     }
+#endif
+   /* Find where the last non-blank character on old/new screen is */
+
+   while (qmax > q)
+     {
+	qmax--;
+	if (!CHAR_EQS(*qmax, SPACE_CHAR))
+	  {
+	     qmax++;
+	     break;
+	  }
+     }
+
+   while (pmax > p)
+     {
+	pmax--;
+	if (!CHAR_EQS(*pmax, SPACE_CHAR))
+	  {
+	     pmax++;
+	     break;
+	  }
+     }
+
+   last_buffered_match = buf = buffer;		       /* buffer is empty */
+
+#ifdef HP_GLITCH_CODE
+   if (handle_hp_glitch)
+     {
+	while (p < pmax)
+	  {
+	     *buf++ = *p++;
+	  }
+     }
+#endif
+
+   /* loop using overwrite then skip algorithm until done */
+   while (1)
+     {
+	/* while they do not match and we do not hit a space, buffer them up */
+	n_spaces = 0;
+	while (p < pmax)
+	  {
+	     if (CHAR_EQS(*q,SPACE_CHAR) && CHAR_EQS(*p, SPACE_CHAR))
+	       {
+		  /* If *q is not a space, we would have to overwrite it.
+		   * However, if *q is a space, then while *p is also one,
+		   * we only need to skip over the blank field.
+		   */
+		  space_match = p;
+		  p++; q++;
+		  while ((p < pmax)
+			 && CHAR_EQS(*q,SPACE_CHAR)
+			 && CHAR_EQS(*p, SPACE_CHAR))
+		    {
+		       p++;
+		       q++;
+		    }
+		  n_spaces = (unsigned int) (p - space_match);
+		  break;
+	       }
+#if SLANG_HAS_KANJI_SUPPORT
+	     if ((*p & 0x80) && ((p + 1) < pmax))
+	       { /* new is kanji */
+		  if (*q & 0x80)
+		    { /* old is also kanji */
+		       if (((0xFF & *q) != (0xFF & *p))
+			   || ((0xFF & q[1]) != (0xFF & p[1])))
+			 {
+			    /* both kanji, but not match */
+			    *buf++ = *p++;
+			    *buf++ = *p++;
+			    q += 2;
+			    continue;
+			 }
+		       else
+			 { /* kanji match ? */
+			    if (!COLOR_EQS(*q, *p) || !COLOR_EQS(*(q+1), *(p+1)))
+			      {
+				 /* code is match ,but color is diff */
+				 *buf++ = *p++;
+				 *buf++ = *p++;
+				 continue;
+			      }
+			    /* really match ! */
+			    break;
+			 }
+		    }
+ 		  else
+		    { /* old is not kanji */
+		       *buf++ = *p++;
+		       *buf++ = *p++;
+		       q += 2;
+		       continue;
+		    }
+	       }
+	     else
+	       { /* new is not kanji */
+ 		  if (*q & 0x80)
+		    { /* old is kanji */
+		       *buf++ = *p++;
+		       q++;
+		       continue;
+		    }
+	       }
+#endif
+
+	     if (CHAR_EQS(*q, *p)) break;
+	     *buf++ = *p++;
+	     q++;
+	  }
+	*buf = 0;
+
+	if (buf != buffer) send_attr_str (buffer);
+	buf = buffer;
+
+	if (n_spaces && (p < pmax))
+	  {
+	     forward_cursor (n_spaces, row);
+	  }
+
+	/* Now we overwrote what we could and cursor is placed at position
+	 * of a possible match of new and old.  If this is the case, skip
+	 * some more.
+	 */
+#if !SLANG_HAS_KANJI_SUPPORT
+	while ((p < pmax) && CHAR_EQS(*p, *q))
+	  {
+	     *buf++ = *p++;
+	     q++;
+	  }
+#else
+	/* Kanji */
+	while (p < pmax)
+	  {
+	     if ((*p & 0x80) && ((p + 1) < pmax))
+	       { /* new is kanji */
+		  if (*q & 0x80)
+		    { /* old is also kanji */
+		       if (((0xFF & *q) == (0xFF & *p))
+			   && ((0xFF & q[1]) == (0xFF & p[1])))
+			 {
+			    /* kanji match ? */
+			    if (!COLOR_EQS(*q, *p)
+				|| !COLOR_EQS(q[1], p[1]))
+			      break;
+
+			    *buf++ = *p++;
+			    q++;
+			    if (p >= pmax)
+			      {
+				 *buf++ = SPACE_CHAR;
+				 p++;
+				 break;
+			      }
+			    else
+			      {
+				 *buf++ = *p++;
+				 q++;
+				 continue;
+			      }
+			 }
+		       else break; /* both kanji, but not match */
+		    }
+		  else break; /* old is not kanji */
+	       }
+	     else
+	       {  /* new is not kanji */
+		  if (*q & 0x80) break; /* old is kanji */
+		  if (!CHAR_EQS(*q, *p)) break;
+		  *buf++ = *p++;
+		  q++;
+	       }
+	  }
+#endif
+	last_buffered_match = buf;
+	if (p >= pmax) break;
+
+	/* jump to new position is it is greater than 5 otherwise
+	 * let it sit in the buffer and output it later.
+	 */
+	if ((int) (buf - buffer) >= 5)
+	  {
+	     forward_cursor ((unsigned int) (buf - buffer), row);
+	     last_buffered_match = buf = buffer;
+	  }
+     }
+
+   if (buf != buffer)
+     {
+	if (q < qmax)
+	  {
+	     if ((buf == last_buffered_match)
+		 && ((int) (buf - buffer) >= 5))
+	       {
+		  forward_cursor ((unsigned int) (buf - buffer), row);
+	       }
+	     else
+	       {
+		  *buf = 0;
+		  send_attr_str (buffer);
+	       }
+	  }
+     }
+   if (q < qmax) SLtt_del_eol ();
+   if (Automatic_Margins && (Cursor_c + 1 >= SLtt_Screen_Cols)) Cursor_Set = 0;
+}
+
+static void get_color_info (void)
+{
+   char *fg, *bg;
+
+   if (SLtt_Use_Ansi_Colors == 0)
+     SLtt_Use_Ansi_Colors = (NULL != getenv ("COLORTERM"));
+
+   if (-1 == get_default_colors (&fg, &bg))
+     return;
+
+   /* Check to see if application has already set them. */
+   if (Color_0_Modified)
+     return;
+
+   SLtt_set_color (0, NULL, fg, bg);
+   SLtt_set_color (1, NULL, bg, fg);
+}
+
+/* termcap stuff */
+
+#ifdef __unix__
+
+# ifndef USE_TERMCAP
+static char *Tbuf;
+static char *Tstr_Buf;
+
+#  define tgetstr SLtt_tigetstr
+#  define tgetent SLtt_tigetent
+#  define TGETNUM(x) SLtt_tigetnum((x), &Tbuf)
+#  define TGETFLAG(x) SLtt_tigetflag((x), &Tbuf)
+# else
+
+extern char *tgetstr(char *, char **);
+extern int tgetent(char *, char *);
+extern int tgetnum(char *);
+extern int tgetflag(char *);
+static char Tstr_Buf[1024];
+static char Tbuf[4096];
+#  define TGETNUM tgetnum
+#  define TGETFLAG tgetflag
+# endif
+
+static char *my_tgetstr(char *what, char **p)
+{
+   register char *w, *w1;
+   char *wsave;
+   what = tgetstr(what, p);
+   if (what != NULL)
+     {
+	/* Check for AIX brain-damage */
+	if (*what == '@')
+	  return NULL;
+
+	/* lose pad info --- with today's technology, term is a loser if
+	   it is really needed */
+	while ((*what == '.') ||
+	       ((*what >= '0') && (*what <= '9'))) what++;
+	if (*what == '*') what++;
+
+	/* lose terminfo padding--- looks like $<...> */
+        w = what;
+	while (*w) if ((*w++ == '$') && (*w == '<'))
+	  {
+	     w1 = w - 1;
+	     while (*w && (*w != '>')) w++;
+	     if (*w == 0) break;
+	     w++;
+	     wsave = w1;
+	     while ((*w1++ = *w++) != 0);
+	     w = wsave;
+	  }
+	if (*what == 0) what = NULL;
+     }
+   return(what);
+}
+
+char *SLtt_tgetstr (char *s)
+{
+# ifdef USE_TERMCAP
+   static
+# endif
+     char *p = Tstr_Buf;
+   return my_tgetstr (s, &p);
+}
+
+int SLtt_tgetnum (char *s)
+{
+   return TGETNUM (s);
+}
+int SLtt_tgetflag (char *s)
+{
+   return TGETFLAG (s);
+}
+
+static int Vt100_Like = 0;
+
+void SLtt_get_terminfo (void)
+{
+   char *term;
+   int status;
+
+   term = getenv ("TERM");
+   if (term == NULL)
+     SLang_exit_error("TERM environment variable needs set.");
+
+   if (0 == (status = SLtt_initialize (term)))
+     return;
+
+   if (status == -1)
+     {
+	SLang_exit_error ("Unknown terminal: %s\n\
+Check the TERM environment variable.\n\
+Also make sure that the terminal is defined in the terminfo database.\n\
+Alternatively, set the TERMCAP environment variable to the desired\n\
+termcap entry.",
+			  term);
+     }
+
+   if (status == -2)
+     {
+	SLang_exit_error ("\
+Your terminal lacks the ability to clear the screen or position the cursor.\n");
+     }
+}
+
+/* Returns 0 if all goes well, -1 if terminal capabilities cannot be deduced,
+ * or -2 if terminal cannot position the cursor.
+ */
+int SLtt_initialize (char *term)
+{
+   char *t, ch;
+   int is_xterm;
+   int almost_vtxxx;
+
+   if (term == NULL)
+     {
+	term = getenv ("TERM");
+	if (term == NULL)
+	  return -1;
+     }
+
+   Linux_Console = (!strncmp (term, "linux", 5)
+# ifdef linux
+		    || !strncmp(term, "con", 3)
+# endif
+		    );
+
+   t = term;
+
+   if (strcmp(t, "vt52") && (*t++ == 'v') && (*t++ == 't')
+       && (ch = *t, (ch >= '1') && (ch <= '9'))) Vt100_Like = 1;
+
+   is_xterm = !strncmp (term, "xterm", 5);
+   almost_vtxxx = (Vt100_Like
+		   || Linux_Console
+		   || is_xterm
+		   || !strcmp (term, "screen"));
+
+# ifndef USE_TERMCAP
+   if (NULL == (Tbuf = tgetent (term)))
+     {
+	if (almost_vtxxx) /* Special cases. */
+	  {
+	     int vt102 = 1;
+	     if (!strcmp (term, "vt100")) vt102 = 0;
+   	     SLtt_set_term_vtxxx (&vt102);
+	     return 0;
+	  }
+	return -1;
+     }
+   Tstr_Buf = Tbuf;
+# else				       /* USE_TERMCAP */
+   if (1 != tgetent(Tbuf, term))
+     return -1;
+# endif				       /* NOT USE_TERMCAP */
+
+   Cls_Str = SLtt_tgetstr ("cl");
+   Curs_Pos_Str = SLtt_tgetstr ("cm");
+
+   if ((NULL == (Ins_Mode_Str = SLtt_tgetstr("im")))
+       || ( NULL == (Eins_Mode_Str = SLtt_tgetstr("ei")))
+       || ( NULL == (Del_Char_Str = SLtt_tgetstr("dc"))))
+     SLtt_Term_Cannot_Insert = 1;
+
+   Visible_Bell_Str = SLtt_tgetstr ("vb");
+   Curs_Up_Str = SLtt_tgetstr ("up");
+   Rev_Scroll_Str = SLtt_tgetstr("sr");
+   Del_N_Lines_Str = SLtt_tgetstr("DL");
+   Add_N_Lines_Str = SLtt_tgetstr("AL");
+
+   /* Actually these are used to initialize terminals that use cursor
+    * addressing.  Hard to believe.
+    */
+   Term_Init_Str = SLtt_tgetstr ("ti");
+   Term_Reset_Str = SLtt_tgetstr ("te");
+
+   /* If I do this for vtxxx terminals, arrow keys start sending ESC O A,
+    * which I do not want.  This is mainly for HP terminals.
+    */
+   if ((almost_vtxxx == 0) || SLtt_Force_Keypad_Init)
+     {
+	Keypad_Init_Str = SLtt_tgetstr ("ks");
+	Keypad_Reset_Str = SLtt_tgetstr ("ke");
+     }
+
+   /* Make up for defective termcap/terminfo databases */
+   if ((Vt100_Like && (term[2] != '1'))
+       || Linux_Console
+       || is_xterm
+       )
+     {
+	if (Del_N_Lines_Str == NULL) Del_N_Lines_Str = "\033[%dM";
+	if (Add_N_Lines_Str == NULL) Add_N_Lines_Str = "\033[%dL";
+     }
+
+   Scroll_R_Str = SLtt_tgetstr("cs");
+
+   SLtt_get_screen_size ();
+
+   if ((Scroll_R_Str == NULL)
+       || (((NULL == Del_N_Lines_Str) || (NULL == Add_N_Lines_Str))
+	   && (NULL == Rev_Scroll_Str)))
+     {
+	if (is_xterm
+	    || Linux_Console
+	    )
+	  {
+	     /* Defective termcap mode!!!! */
+	     SLtt_set_term_vtxxx (NULL);
+	  }
+	else SLtt_Term_Cannot_Scroll = 1;
+     }
+
+   Del_Eol_Str = SLtt_tgetstr("ce");
+
+   Rev_Vid_Str = SLtt_tgetstr("mr");
+   if (Rev_Vid_Str == NULL) Rev_Vid_Str = SLtt_tgetstr("so");
+
+   Bold_Vid_Str = SLtt_tgetstr("md");
+
+   /* Although xterm cannot blink, it does display the blinking characters
+    * as bold ones.  Some Rxvt will display the background as high intensity.
+    */
+   if ((NULL == (Blink_Vid_Str = SLtt_tgetstr("mb")))
+       && is_xterm)
+     Blink_Vid_Str = "\033[5m";
+
+   UnderLine_Vid_Str = SLtt_tgetstr("us");
+
+   Start_Alt_Chars_Str = SLtt_tgetstr ("as");   /* smacs */
+   End_Alt_Chars_Str = SLtt_tgetstr ("ae");   /* rmacs */
+   Enable_Alt_Char_Set = SLtt_tgetstr ("eA");   /* enacs */
+   SLtt_Graphics_Char_Pairs = SLtt_tgetstr ("ac");
+
+   if (NULL == SLtt_Graphics_Char_Pairs)
+     {
+	/* make up for defective termcap/terminfo */
+	if (Vt100_Like)
+	  {
+	     Start_Alt_Chars_Str = "\016";
+	     End_Alt_Chars_Str = "\017";
+	     Enable_Alt_Char_Set = "\033)0";
+	  }
+     }
+
+    /* aixterm added by willi */
+   if (is_xterm || !strncmp (term, "aixterm", 7))
+     {
+	Start_Alt_Chars_Str = "\016";
+	End_Alt_Chars_Str = "\017";
+	Enable_Alt_Char_Set = "\033(B\033)0";
+     }
+
+   if ((SLtt_Graphics_Char_Pairs == NULL) &&
+       ((Start_Alt_Chars_Str == NULL) || (End_Alt_Chars_Str == NULL)))
+     {
+	SLtt_Has_Alt_Charset = 0;
+	Enable_Alt_Char_Set = NULL;
+     }
+   else SLtt_Has_Alt_Charset = 1;
+
+   /* status line capabilities */
+   if ((SLtt_Has_Status_Line == -1)
+       && (0 != (SLtt_Has_Status_Line = TGETFLAG ("hs"))))
+     {
+	Disable_Status_line_Str = SLtt_tgetstr ("ds");
+	Return_From_Status_Line_Str = SLtt_tgetstr ("fs");
+	Goto_Status_Line_Str = SLtt_tgetstr ("ts");
+	Status_Line_Esc_Ok = TGETFLAG("es");
+	Num_Status_Line_Columns = TGETNUM("ws");
+	if (Num_Status_Line_Columns < 0) Num_Status_Line_Columns = 0;
+     }
+
+   if (NULL == (Norm_Vid_Str = SLtt_tgetstr("me")))
+     {
+	Norm_Vid_Str = SLtt_tgetstr("se");
+     }
+
+   Cursor_Invisible_Str = SLtt_tgetstr("vi");
+   Cursor_Visible_Str = SLtt_tgetstr("ve");
+
+   Curs_F_Str = SLtt_tgetstr("RI");
+
+# if 0
+   if (NULL != Curs_F_Str)
+     {
+	Len_Curs_F_Str = strlen(Curs_F_Str);
+     }
+   else Len_Curs_F_Str = strlen(Curs_Pos_Str);
+# endif
+
+   Automatic_Margins = TGETFLAG ("am");
+   /* No_Move_In_Standout = !TGETFLAG ("ms"); */
+# ifdef HP_GLITCH_CODE
+   Has_HP_Glitch = TGETFLAG ("xs");
+# else
+   Worthless_Highlight = TGETFLAG ("xs");
+# endif
+
+   if (Worthless_Highlight == 0)
+     {				       /* Magic cookie glitch */
+	Worthless_Highlight = (TGETNUM ("sg") > 0);
+     }
+
+   if (Worthless_Highlight)
+     SLtt_Has_Alt_Charset = 0;
+
+   Reset_Color_String = SLtt_tgetstr ("op");
+   Color_Fg_Str = SLtt_tgetstr ("AF");
+   Color_Bg_Str = SLtt_tgetstr ("AB");
+   if ((Color_Fg_Str == NULL) || (Color_Bg_Str == NULL))
+     {
+	Color_Fg_Str = SLtt_tgetstr ("Sf");
+	Color_Bg_Str = SLtt_tgetstr ("Sb");
+     }
+
+   if (-1 == (Max_Terminfo_Colors = SLtt_tgetnum ("Co")))
+     Max_Terminfo_Colors = 8;
+
+   if ((Color_Bg_Str != NULL) && (Color_Fg_Str != NULL))
+     SLtt_Use_Ansi_Colors = 1;
+   else
+     {
+#if 0
+	Color_Fg_Str = "%?%p1%{7}%>%t\033[1;3%p1%{8}%m%dm%e\033[3%p1%dm%;";
+	Color_Bg_Str = "%?%p1%{7}%>%t\033[5;4%p1%{8}%m%dm%e\033[4%p1%dm%;";
+	Max_Terminfo_Colors = 16;
+#else
+	Color_Fg_Str = "\033[3%dm";
+	Color_Bg_Str = "\033[4%dm";
+	Max_Terminfo_Colors = 8;
+#endif
+     }
+
+   get_color_info ();
+
+   if ((Cls_Str == NULL)
+       || (Curs_Pos_Str == NULL))
+     return -2;
+
+   return 0;
+}
+
+#endif
+/* Unix */
+
+/* specific to vtxxx only */
+void SLtt_enable_cursor_keys (void)
+{
+#ifdef __unix__
+   if (Vt100_Like)
+#endif
+     tt_write_string("\033=\033[?1l");
+}
+
+#ifdef VMS
+int SLtt_initialize (char *term)
+{
+   SLtt_get_terminfo ();
+   return 0;
+}
+
+void SLtt_get_terminfo ()
+{
+   int zero = 0;
+
+   get_color_info ();
+
+   SLtt_set_term_vtxxx(&zero);
+   Start_Alt_Chars_Str = "\016";
+   End_Alt_Chars_Str = "\017";
+   SLtt_Has_Alt_Charset = 1;
+   SLtt_Graphics_Char_Pairs = "aaffgghhjjkkllmmnnooqqssttuuvvwwxx";
+   Enable_Alt_Char_Set = "\033(B\033)0";
+   SLtt_get_screen_size ();
+}
+#endif
+
+/* This sets term for vt102 terminals it parameter vt100 is 0.  If vt100
+ * is non-zero, set terminal appropriate for a only vt100
+ * (no add line capability). */
+
+void SLtt_set_term_vtxxx(int *vt100)
+{
+   Norm_Vid_Str = "\033[m";
+
+   Scroll_R_Str = "\033[%i%d;%dr";
+   Cls_Str = "\033[2J\033[H";
+   Rev_Vid_Str = "\033[7m";
+   Bold_Vid_Str = "\033[1m";
+   Blink_Vid_Str = "\033[5m";
+   UnderLine_Vid_Str = "\033[4m";
+   Del_Eol_Str = "\033[K";
+   Rev_Scroll_Str = "\033M";
+   Curs_F_Str = "\033[%dC";
+   /* Len_Curs_F_Str = 5; */
+   Curs_Pos_Str = "\033[%i%d;%dH";
+   if ((vt100 == NULL) || (*vt100 == 0))
+     {
+	Ins_Mode_Str = "\033[4h";
+	Eins_Mode_Str = "\033[4l";
+	Del_Char_Str =  "\033[P";
+	Del_N_Lines_Str = "\033[%dM";
+	Add_N_Lines_Str = "\033[%dL";
+	SLtt_Term_Cannot_Insert = 0;
+     }
+   else
+     {
+	Del_N_Lines_Str = NULL;
+	Add_N_Lines_Str = NULL;
+	SLtt_Term_Cannot_Insert = 1;
+     }
+   SLtt_Term_Cannot_Scroll = 0;
+   /* No_Move_In_Standout = 0; */
+}
+
+int SLtt_init_video (void)
+{
+   /*   send_string_to_term("\033[?6h"); */
+   /* relative origin mode */
+   tt_write_string (Term_Init_Str);
+   tt_write_string (Keypad_Init_Str);
+   SLtt_reset_scroll_region();
+   SLtt_end_insert();
+   tt_write_string (Enable_Alt_Char_Set);
+   Video_Initialized = 1;
+   return 0;
+}
+
+int SLtt_reset_video (void)
+{
+   SLtt_goto_rc (SLtt_Screen_Rows - 1, 0);
+   Cursor_Set = 0;
+   SLtt_normal_video ();	       /* MSKermit requires this  */
+   tt_write_string(Norm_Vid_Str);
+
+   Current_Fgbg = 0xFFFFFFFFU;
+   SLtt_set_alt_char_set (0);
+   if (SLtt_Use_Ansi_Colors)
+     {
+	if (Reset_Color_String == NULL)
+	  {
+	     SLtt_Char_Type attr;
+	     if (-1 != make_color_fgbg (NULL, NULL, &attr))
+	       write_attributes (attr);
+	     else tt_write_string ("\033[0m\033[m");
+	  }
+	else tt_write_string (Reset_Color_String);
+	Current_Fgbg = 0xFFFFFFFFU;
+     }
+   SLtt_erase_line ();
+   tt_write_string (Keypad_Reset_Str);
+   tt_write_string (Term_Reset_Str);
+   SLtt_flush_output ();
+   Video_Initialized = 0;
+   return 0;
+}
+
+void SLtt_bold_video (void)
+{
+   tt_write_string (Bold_Vid_Str);
+}
+
+int SLtt_set_mouse_mode (int mode, int force)
+{
+   char *term;
+
+   if (force == 0)
+     {
+	if (NULL == (term = (char *) getenv("TERM"))) return -1;
+	if (strncmp ("xterm", term, 5))
+	  return -1;
+     }
+
+   if (mode)
+     tt_write_string ("\033[?9h");
+   else
+     tt_write_string ("\033[?9l");
+
+   return 0;
+}
+
+void SLtt_disable_status_line (void)
+{
+   if (SLtt_Has_Status_Line > 0)
+     tt_write_string (Disable_Status_line_Str);
+}
+
+int SLtt_write_to_status_line (char *s, int col)
+{
+   if ((SLtt_Has_Status_Line <= 0)
+       || (Goto_Status_Line_Str == NULL)
+       || (Return_From_Status_Line_Str == NULL))
+     return -1;
+
+   tt_printf (Goto_Status_Line_Str, col, 0);
+   tt_write_string (s);
+   tt_write_string (Return_From_Status_Line_Str);
+   return 0;
+}
+
+void SLtt_get_screen_size (void)
+{
+#ifdef VMS
+   int status, code;
+   unsigned short chan;
+   $DESCRIPTOR(dev_dsc, "SYS$INPUT:");
+#endif
+   int r = 0, c = 0;
+
+#ifdef TIOCGWINSZ
+   struct winsize wind_struct;
+
+   do
+     {
+	if ((ioctl(1,TIOCGWINSZ,&wind_struct) == 0)
+	    || (ioctl(0, TIOCGWINSZ, &wind_struct) == 0)
+	    || (ioctl(2, TIOCGWINSZ, &wind_struct) == 0))
+	  {
+	     c = (int) wind_struct.ws_col;
+	     r = (int) wind_struct.ws_row;
+	     break;
+	  }
+     }
+   while (errno == EINTR);
+
+#endif
+
+#ifdef VMS
+   status = sys$assign(&dev_dsc,&chan,0,0,0);
+   if (status & 1)
+     {
+	code = DVI$_DEVBUFSIZ;
+	status = lib$getdvi(&code, &chan,0, &c, 0,0);
+	if (!(status & 1))
+	  c = 80;
+	code = DVI$_TT_PAGE;
+	status = lib$getdvi(&code, &chan,0, &r, 0,0);
+	if (!(status & 1))
+	  r = 24;
+	sys$dassgn(chan);
+     }
+#endif
+
+   if (r <= 0)
+     {
+	char *s = getenv ("LINES");
+	if (s != NULL) r = atoi (s);
+     }
+
+   if (c <= 0)
+     {
+	char *s = getenv ("COLUMNS");
+	if (s != NULL) c = atoi (s);
+     }
+
+   if ((r <= 0) || (r > 200)) r = 24;
+   if ((c <= 0) || (c > 250)) c = 80;
+
+   SLtt_Screen_Rows = r;
+   SLtt_Screen_Cols = c;
+}