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[Emacs-diffs] Changes to emacs/src/msdos.c [emacs-unicode-2]
|
From: |
Kenichi Handa |
|
Subject: |
[Emacs-diffs] Changes to emacs/src/msdos.c [emacs-unicode-2] |
|
Date: |
Mon, 08 Sep 2003 08:49:19 -0400 |
Index: emacs/src/msdos.c
diff -c /dev/null emacs/src/msdos.c:1.184.2.1
*** /dev/null Mon Sep 8 08:49:19 2003
--- emacs/src/msdos.c Mon Sep 8 08:48:11 2003
***************
*** 0 ****
--- 1,5299 ----
+ /* MS-DOS specific C utilities. -*- coding: raw-text -*-
+ Copyright (C) 1993, 94, 95, 96, 97, 1999, 2000, 01, 2003
+ Free Software Foundation, Inc.
+
+ This file is part of GNU Emacs.
+
+ GNU Emacs is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ GNU Emacs is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with GNU Emacs; see the file COPYING. If not, write to
+ the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+ /* Contributed by Morten Welinder */
+ /* New display, keyboard, and mouse control by Kim F. Storm */
+
+ /* Note: some of the stuff here was taken from end of sysdep.c in demacs. */
+
+ #include <config.h>
+
+ #ifdef MSDOS
+ #include "lisp.h"
+ #include <stdio.h>
+ #include <stdlib.h>
+ #include <time.h>
+ #include <sys/param.h>
+ #include <sys/time.h>
+ #include <dos.h>
+ #include <errno.h>
+ #include <string.h> /* for bzero and string functions */
+ #include <sys/stat.h> /* for _fixpath */
+ #include <unistd.h> /* for chdir, dup, dup2, etc. */
+ #include <dir.h> /* for getdisk */
+ #if __DJGPP__ >= 2
+ #include <fcntl.h>
+ #include <io.h> /* for setmode */
+ #include <dpmi.h> /* for __dpmi_xxx stuff */
+ #include <sys/farptr.h> /* for _farsetsel, _farnspokeb */
+ #include <libc/dosio.h> /* for _USE_LFN */
+ #include <conio.h> /* for cputs */
+ #endif
+
+ #include "msdos.h"
+ #include "systime.h"
+ #include "termhooks.h"
+ #include "termchar.h"
+ #include "dispextern.h"
+ #include "dosfns.h"
+ #include "termopts.h"
+ #include "character.h"
+ #include "coding.h"
+ #include "disptab.h"
+ #include "frame.h"
+ #include "window.h"
+ #include "buffer.h"
+ #include "commands.h"
+ #include "blockinput.h"
+ #include "keyboard.h"
+ #include <go32.h>
+ #include <pc.h>
+ #include <ctype.h>
+ /* #include <process.h> */
+ /* Damn that local process.h! Instead we can define P_WAIT ourselves. */
+ #define P_WAIT 1
+
+ #ifndef _USE_LFN
+ #define _USE_LFN 0
+ #endif
+
+ #ifndef _dos_ds
+ #define _dos_ds _go32_info_block.selector_for_linear_memory
+ #endif
+
+ #if __DJGPP__ > 1
+
+ #include <signal.h>
+ #include "syssignal.h"
+
+ #ifndef SYSTEM_MALLOC
+
+ #ifdef GNU_MALLOC
+
+ /* If other `malloc' than ours is used, force our `sbrk' behave like
+ Unix programs expect (resize memory blocks to keep them contiguous).
+ If `sbrk' from `ralloc.c' is NOT used, also zero-out sbrk'ed memory,
+ because that's what `gmalloc' expects to get. */
+ #include <crt0.h>
+
+ #ifdef REL_ALLOC
+ int _crt0_startup_flags = _CRT0_FLAG_UNIX_SBRK;
+ #else /* not REL_ALLOC */
+ int _crt0_startup_flags = (_CRT0_FLAG_UNIX_SBRK |
_CRT0_FLAG_FILL_SBRK_MEMORY);
+ #endif /* not REL_ALLOC */
+ #endif /* GNU_MALLOC */
+
+ #endif /* not SYSTEM_MALLOC */
+ #endif /* __DJGPP__ > 1 */
+
+ static unsigned long
+ event_timestamp ()
+ {
+ struct time t;
+ unsigned long s;
+
+ gettime (&t);
+ s = t.ti_min;
+ s *= 60;
+ s += t.ti_sec;
+ s *= 1000;
+ s += t.ti_hund * 10;
+
+ return s;
+ }
+
+
+ /* ------------------------ Mouse control ---------------------------
+ *
+ * Coordinates are in screen positions and zero based.
+ * Mouse buttons are numbered from left to right and also zero based.
+ */
+
+ /* This used to be in termhooks.h, but mainstream Emacs code no longer
+ uses it, and it was removed... */
+ #define NUM_MOUSE_BUTTONS (5)
+
+ int have_mouse; /* 0: no, 1: enabled, -1: disabled */
+ static int mouse_visible;
+
+ static int mouse_last_x;
+ static int mouse_last_y;
+
+ static int mouse_button_translate[NUM_MOUSE_BUTTONS];
+ static int mouse_button_count;
+
+ void
+ mouse_on ()
+ {
+ union REGS regs;
+
+ if (have_mouse > 0 && !mouse_visible)
+ {
+ if (termscript)
+ fprintf (termscript, "<M_ON>");
+ regs.x.ax = 0x0001;
+ int86 (0x33, ®s, ®s);
+ mouse_visible = 1;
+ }
+ }
+
+ void
+ mouse_off ()
+ {
+ union REGS regs;
+
+ if (have_mouse > 0 && mouse_visible)
+ {
+ if (termscript)
+ fprintf (termscript, "<M_OFF>");
+ regs.x.ax = 0x0002;
+ int86 (0x33, ®s, ®s);
+ mouse_visible = 0;
+ }
+ }
+
+ static void
+ mouse_setup_buttons (int n_buttons)
+ {
+ if (n_buttons == 3)
+ {
+ mouse_button_count = 3;
+ mouse_button_translate[0] = 0; /* Left */
+ mouse_button_translate[1] = 2; /* Middle */
+ mouse_button_translate[2] = 1; /* Right */
+ }
+ else /* two, what else? */
+ {
+ mouse_button_count = 2;
+ mouse_button_translate[0] = 0;
+ mouse_button_translate[1] = 1;
+ }
+ }
+
+ DEFUN ("msdos-set-mouse-buttons", Fmsdos_set_mouse_buttons,
Smsdos_set_mouse_buttons,
+ 1, 1, "NSet number of mouse buttons to: ",
+ doc: /* Set the number of mouse buttons to use by Emacs.
+ This is useful with mice that report the number of buttons inconsistently,
+ e.g., if the number of buttons is reported as 3, but Emacs only sees 2 of
+ them. This happens with wheeled mice on Windows 9X, for example. */)
+ (nbuttons)
+ Lisp_Object nbuttons;
+ {
+ int n;
+
+ CHECK_NUMBER (nbuttons);
+ n = XINT (nbuttons);
+ if (n < 2 || n > 3)
+ Fsignal (Qargs_out_of_range,
+ Fcons (build_string ("only 2 or 3 mouse buttons are supported"),
+ Fcons (nbuttons, Qnil)));
+ mouse_setup_buttons (n);
+ return Qnil;
+ }
+
+ static void
+ mouse_get_xy (int *x, int *y)
+ {
+ union REGS regs;
+
+ regs.x.ax = 0x0003;
+ int86 (0x33, ®s, ®s);
+ *x = regs.x.cx / 8;
+ *y = regs.x.dx / 8;
+ }
+
+ void
+ mouse_moveto (x, y)
+ int x, y;
+ {
+ union REGS regs;
+
+ if (termscript)
+ fprintf (termscript, "<M_XY=%dx%d>", x, y);
+ regs.x.ax = 0x0004;
+ mouse_last_x = regs.x.cx = x * 8;
+ mouse_last_y = regs.x.dx = y * 8;
+ int86 (0x33, ®s, ®s);
+ }
+
+ static int
+ mouse_pressed (b, xp, yp)
+ int b, *xp, *yp;
+ {
+ union REGS regs;
+
+ if (b >= mouse_button_count)
+ return 0;
+ regs.x.ax = 0x0005;
+ regs.x.bx = mouse_button_translate[b];
+ int86 (0x33, ®s, ®s);
+ if (regs.x.bx)
+ *xp = regs.x.cx / 8, *yp = regs.x.dx / 8;
+ return (regs.x.bx != 0);
+ }
+
+ static int
+ mouse_released (b, xp, yp)
+ int b, *xp, *yp;
+ {
+ union REGS regs;
+
+ if (b >= mouse_button_count)
+ return 0;
+ regs.x.ax = 0x0006;
+ regs.x.bx = mouse_button_translate[b];
+ int86 (0x33, ®s, ®s);
+ if (regs.x.bx)
+ *xp = regs.x.cx / 8, *yp = regs.x.dx / 8;
+ return (regs.x.bx != 0);
+ }
+
+ static int
+ mouse_button_depressed (b, xp, yp)
+ int b, *xp, *yp;
+ {
+ union REGS regs;
+
+ if (b >= mouse_button_count)
+ return 0;
+ regs.x.ax = 0x0003;
+ int86 (0x33, ®s, ®s);
+ if ((regs.x.bx & (1 << mouse_button_translate[b])) != 0)
+ {
+ *xp = regs.x.cx / 8;
+ *yp = regs.x.dx / 8;
+ return 1;
+ }
+ return 0;
+ }
+
+ void
+ mouse_get_pos (f, insist, bar_window, part, x, y, time)
+ FRAME_PTR *f;
+ int insist;
+ Lisp_Object *bar_window, *x, *y;
+ enum scroll_bar_part *part;
+ unsigned long *time;
+ {
+ int ix, iy;
+ Lisp_Object frame, tail;
+
+ /* Clear the mouse-moved flag for every frame on this display. */
+ FOR_EACH_FRAME (tail, frame)
+ XFRAME (frame)->mouse_moved = 0;
+
+ *f = SELECTED_FRAME();
+ *bar_window = Qnil;
+ mouse_get_xy (&ix, &iy);
+ *time = event_timestamp ();
+ *x = make_number (mouse_last_x = ix);
+ *y = make_number (mouse_last_y = iy);
+ }
+
+ static void
+ mouse_check_moved ()
+ {
+ int x, y;
+
+ mouse_get_xy (&x, &y);
+ SELECTED_FRAME()->mouse_moved |= (x != mouse_last_x || y != mouse_last_y);
+ mouse_last_x = x;
+ mouse_last_y = y;
+ }
+
+ /* Force the mouse driver to ``forget'' about any button clicks until
+ now. */
+ static void
+ mouse_clear_clicks (void)
+ {
+ int b;
+
+ for (b = 0; b < mouse_button_count; b++)
+ {
+ int dummy_x, dummy_y;
+
+ (void) mouse_pressed (b, &dummy_x, &dummy_y);
+ (void) mouse_released (b, &dummy_x, &dummy_y);
+ }
+ }
+
+ void
+ mouse_init ()
+ {
+ union REGS regs;
+
+ if (termscript)
+ fprintf (termscript, "<M_INIT>");
+
+ regs.x.ax = 0x0021;
+ int86 (0x33, ®s, ®s);
+
+ /* Reset the mouse last press/release info. It seems that Windows
+ doesn't do that automatically when function 21h is called, which
+ causes Emacs to ``remember'' the click that switched focus to the
+ window just before Emacs was started from that window. */
+ mouse_clear_clicks ();
+
+ regs.x.ax = 0x0007;
+ regs.x.cx = 0;
+ regs.x.dx = 8 * (ScreenCols () - 1);
+ int86 (0x33, ®s, ®s);
+
+ regs.x.ax = 0x0008;
+ regs.x.cx = 0;
+ regs.x.dx = 8 * (ScreenRows () - 1);
+ int86 (0x33, ®s, ®s);
+
+ mouse_moveto (0, 0);
+ mouse_visible = 0;
+ }
+
+ /* ------------------------- Screen control ----------------------
+ *
+ */
+
+ static int internal_terminal = 0;
+
+ #ifndef HAVE_X_WINDOWS
+ extern unsigned char ScreenAttrib;
+ static int screen_face;
+
+ static int screen_size_X;
+ static int screen_size_Y;
+ static int screen_size;
+
+ static int current_pos_X;
+ static int current_pos_Y;
+ static int new_pos_X;
+ static int new_pos_Y;
+
+ static void *startup_screen_buffer;
+ static int startup_screen_size_X;
+ static int startup_screen_size_Y;
+ static int startup_pos_X;
+ static int startup_pos_Y;
+ static unsigned char startup_screen_attrib;
+
+ static clock_t startup_time;
+
+ static int term_setup_done;
+
+ static unsigned short outside_cursor;
+
+ /* Similar to the_only_frame. */
+ struct x_output the_only_x_display;
+
+ /* Support for DOS/V (allows Japanese characters to be displayed on
+ standard, non-Japanese, ATs). Only supported for DJGPP v2 and later. */
+
+ /* Holds the address of the text-mode screen buffer. */
+ static unsigned long screen_old_address = 0;
+ /* Segment and offset of the virtual screen. If 0, DOS/V is NOT loaded. */
+ static unsigned short screen_virtual_segment = 0;
+ static unsigned short screen_virtual_offset = 0;
+ /* A flag to control how to display unibyte 8-bit characters. */
+ extern int unibyte_display_via_language_environment;
+
+ Lisp_Object Qbar, Qhbar;
+
+ /* The screen colors of the current frame, which serve as the default
+ colors for newly-created frames. */
+ static int initial_screen_colors[2];
+
+ #if __DJGPP__ > 1
+ /* Update the screen from a part of relocated DOS/V screen buffer which
+ begins at OFFSET and includes COUNT characters. */
+ static void
+ dosv_refresh_virtual_screen (int offset, int count)
+ {
+ __dpmi_regs regs;
+
+ if (offset < 0 || count < 0) /* paranoia; invalid values crash DOS/V
*/
+ return;
+
+ regs.h.ah = 0xff; /* update relocated screen */
+ regs.x.es = screen_virtual_segment;
+ regs.x.di = screen_virtual_offset + offset;
+ regs.x.cx = count;
+ __dpmi_int (0x10, ®s);
+ }
+ #endif
+
+ static void
+ dos_direct_output (y, x, buf, len)
+ int x, y;
+ char *buf;
+ int len;
+ {
+ int t0 = 2 * (x + y * screen_size_X);
+ int t = t0 + (int) ScreenPrimary;
+ int l0 = len;
+
+ #if (__DJGPP__ < 2)
+ while (--len >= 0) {
+ dosmemput (buf++, 1, t);
+ t += 2;
+ }
+ #else
+ /* This is faster. */
+ for (_farsetsel (_dos_ds); --len >= 0; t += 2, buf++)
+ _farnspokeb (t, *buf);
+
+ if (screen_virtual_segment)
+ dosv_refresh_virtual_screen (t0, l0);
+ #endif
+ }
+ #endif
+
+ /* Flash the screen as a substitute for BEEPs. */
+
+ #if (__DJGPP__ < 2)
+ static void
+ do_visible_bell (xorattr)
+ unsigned char xorattr;
+ {
+ asm volatile
+ (" movb $1,%%dl \n\
+ visible_bell_0: \n\
+ movl _ScreenPrimary,%%eax \n\
+ call dosmemsetup \n\
+ movl %%eax,%%ebx \n\
+ movl %1,%%ecx \n\
+ movb %0,%%al \n\
+ incl %%ebx \n\
+ visible_bell_1: \n\
+ xorb %%al,%%gs:(%%ebx) \n\
+ addl $2,%%ebx \n\
+ decl %%ecx \n\
+ jne visible_bell_1 \n\
+ decb %%dl \n\
+ jne visible_bell_3 \n\
+ visible_bell_2: \n\
+ movzwl %%ax,%%eax \n\
+ movzwl %%ax,%%eax \n\
+ movzwl %%ax,%%eax \n\
+ movzwl %%ax,%%eax \n\
+ decw %%cx \n\
+ jne visible_bell_2 \n\
+ jmp visible_bell_0 \n\
+ visible_bell_3:"
+ : /* no output */
+ : "m" (xorattr), "g" (screen_size)
+ : "%eax", "%ebx", /* "%gs",*/ "%ecx", "%edx");
+ }
+
+ static void
+ ScreenVisualBell (void)
+ {
+ /* This creates an xor-mask that will swap the default fore- and
+ background colors. */
+ do_visible_bell (((the_only_x_display.foreground_pixel
+ ^ the_only_x_display.background_pixel)
+ * 0x11) & 0x7f);
+ }
+ #endif
+
+ #ifndef HAVE_X_WINDOWS
+
+ static int blink_bit = -1; /* the state of the blink bit at startup */
+
+ /* Enable bright background colors. */
+ static void
+ bright_bg (void)
+ {
+ union REGS regs;
+
+ /* Remember the original state of the blink/bright-background bit.
+ It is stored at 0040:0065h in the BIOS data area. */
+ if (blink_bit == -1)
+ blink_bit = (_farpeekb (_dos_ds, 0x465) & 0x20) == 0x20;
+
+ regs.h.bl = 0;
+ regs.x.ax = 0x1003;
+ int86 (0x10, ®s, ®s);
+ }
+
+ /* Disable bright background colors (and enable blinking) if we found
+ the video system in that state at startup. */
+ static void
+ maybe_enable_blinking (void)
+ {
+ if (blink_bit == 1)
+ {
+ union REGS regs;
+
+ regs.h.bl = 1;
+ regs.x.ax = 0x1003;
+ int86 (0x10, ®s, ®s);
+ }
+ }
+
+ /* Return non-zero if the system has a VGA adapter. */
+ static int
+ vga_installed (void)
+ {
+ union REGS regs;
+
+ regs.x.ax = 0x1a00;
+ int86 (0x10, ®s, ®s);
+ if (regs.h.al == 0x1a && regs.h.bl > 5 && regs.h.bl < 13)
+ return 1;
+ return 0;
+ }
+
+ /* Set the screen dimensions so that it can show no less than
+ ROWS x COLS frame. */
+
+ void
+ dos_set_window_size (rows, cols)
+ int *rows, *cols;
+ {
+ char video_name[30];
+ union REGS regs;
+ Lisp_Object video_mode;
+ int video_mode_value, have_vga = 0;
+ int current_rows = ScreenRows (), current_cols = ScreenCols ();
+
+ if (*rows == current_rows && *cols == current_cols)
+ return;
+
+ mouse_off ();
+ have_vga = vga_installed ();
+
+ /* If the user specified a special video mode for these dimensions,
+ use that mode. */
+ sprintf (video_name, "screen-dimensions-%dx%d", *rows, *cols);
+ video_mode = XSYMBOL (Fintern_soft (build_string (video_name),
+ Qnil))-> value;
+
+ if (INTEGERP (video_mode)
+ && (video_mode_value = XINT (video_mode)) > 0)
+ {
+ regs.x.ax = video_mode_value;
+ int86 (0x10, ®s, ®s);
+
+ if (have_mouse)
+ {
+ /* Must hardware-reset the mouse, or else it won't update
+ its notion of screen dimensions for some non-standard
+ video modes. This is *painfully* slow... */
+ regs.x.ax = 0;
+ int86 (0x33, ®s, ®s);
+ }
+ }
+
+ /* Find one of the dimensions supported by standard EGA/VGA
+ which gives us at least the required dimensions. */
+
+ #if __DJGPP__ > 1
+
+ else
+ {
+ static struct {
+ int rows, need_vga;
+ } std_dimension[] = {
+ {25, 0},
+ {28, 1},
+ {35, 0},
+ {40, 1},
+ {43, 0},
+ {50, 1}
+ };
+ int i = 0;
+
+ while (i < sizeof (std_dimension) / sizeof (std_dimension[0]))
+ {
+ if (std_dimension[i].need_vga <= have_vga
+ && std_dimension[i].rows >= *rows)
+ {
+ if (std_dimension[i].rows != current_rows
+ || *cols != current_cols)
+ _set_screen_lines (std_dimension[i].rows);
+ break;
+ }
+ i++;
+ }
+ }
+
+ #else /* not __DJGPP__ > 1 */
+
+ else if (*rows <= 25)
+ {
+ if (current_rows != 25 || current_cols != 80)
+ {
+ regs.x.ax = 3;
+ int86 (0x10, ®s, ®s);
+ regs.x.ax = 0x1101;
+ regs.h.bl = 0;
+ int86 (0x10, ®s, ®s);
+ regs.x.ax = 0x1200;
+ regs.h.bl = 32;
+ int86 (0x10, ®s, ®s);
+ regs.x.ax = 3;
+ int86 (0x10, ®s, ®s);
+ }
+ }
+ else if (*rows <= 50)
+ if (have_vga && (current_rows != 50 || current_cols != 80)
+ || *rows <= 43 && (current_rows != 43 || current_cols != 80))
+ {
+ regs.x.ax = 3;
+ int86 (0x10, ®s, ®s);
+ regs.x.ax = 0x1112;
+ regs.h.bl = 0;
+ int86 (0x10, ®s, ®s);
+ regs.x.ax = 0x1200;
+ regs.h.bl = 32;
+ int86 (0x10, ®s, ®s);
+ regs.x.ax = 0x0100;
+ regs.x.cx = 7;
+ int86 (0x10, ®s, ®s);
+ }
+ #endif /* not __DJGPP__ > 1 */
+
+ if (have_mouse)
+ {
+ mouse_init ();
+ mouse_on ();
+ }
+
+ /* Tell the caller what dimensions have been REALLY set. */
+ *rows = ScreenRows ();
+ *cols = ScreenCols ();
+
+ /* Update Emacs' notion of screen dimensions. */
+ screen_size_X = *cols;
+ screen_size_Y = *rows;
+ screen_size = *cols * *rows;
+
+ #if __DJGPP__ > 1
+ /* If the dimensions changed, the mouse highlight info is invalid. */
+ if (current_rows != *rows || current_cols != *cols)
+ {
+ struct frame *f = SELECTED_FRAME();
+ struct display_info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
+ Lisp_Object window = dpyinfo->mouse_face_window;
+
+ if (! NILP (window) && XFRAME (XWINDOW (window)->frame) == f)
+ {
+ dpyinfo->mouse_face_beg_row = dpyinfo->mouse_face_beg_col = -1;
+ dpyinfo->mouse_face_end_row = dpyinfo->mouse_face_end_col = -1;
+ dpyinfo->mouse_face_window = Qnil;
+ }
+ }
+ #endif
+
+ /* Enable bright background colors. */
+ bright_bg ();
+
+ /* FIXME: I'm not sure the above will run at all on DOS/V. But let's
+ be defensive anyway. */
+ if (screen_virtual_segment)
+ dosv_refresh_virtual_screen (0, *cols * *rows);
+ }
+
+ /* If we write a character in the position where the mouse is,
+ the mouse cursor may need to be refreshed. */
+
+ static void
+ mouse_off_maybe ()
+ {
+ int x, y;
+
+ if (!mouse_visible)
+ return;
+
+ mouse_get_xy (&x, &y);
+ if (y != new_pos_Y || x < new_pos_X)
+ return;
+
+ mouse_off ();
+ }
+
+ #define DEFAULT_CURSOR_START (-1)
+ #define DEFAULT_CURSOR_WIDTH (-1)
+ #define BOX_CURSOR_WIDTH (-32)
+
+ /* Set cursor to begin at scan line START_LINE in the character cell
+ and extend for WIDTH scan lines. Scan lines are counted from top
+ of the character cell, starting from zero. */
+ static void
+ msdos_set_cursor_shape (struct frame *f, int start_line, int width)
+ {
+ #if __DJGPP__ > 1
+ unsigned desired_cursor;
+ __dpmi_regs regs;
+ int max_line, top_line, bot_line;
+
+ /* Avoid the costly BIOS call if F isn't the currently selected
+ frame. Allow for NULL as unconditionally meaning the selected
+ frame. */
+ if (f && f != SELECTED_FRAME())
+ return;
+
+ /* The character cell size in scan lines is stored at 40:85 in the
+ BIOS data area. */
+ max_line = _farpeekw (_dos_ds, 0x485) - 1;
+ switch (max_line)
+ {
+ default: /* this relies on CGA cursor emulation being ON! */
+ case 7:
+ bot_line = 7;
+ break;
+ case 9:
+ bot_line = 9;
+ break;
+ case 13:
+ bot_line = 12;
+ break;
+ case 15:
+ bot_line = 14;
+ break;
+ }
+
+ if (width < 0)
+ {
+ if (width == BOX_CURSOR_WIDTH)
+ {
+ top_line = 0;
+ bot_line = max_line;
+ }
+ else if (start_line != DEFAULT_CURSOR_START)
+ {
+ top_line = start_line;
+ bot_line = top_line - width - 1;
+ }
+ else if (width != DEFAULT_CURSOR_WIDTH)
+ {
+ top_line = 0;
+ bot_line = -1 - width;
+ }
+ else
+ top_line = bot_line + 1;
+ }
+ else if (width == 0)
+ {
+ /* [31, 0] seems to DTRT for all screen sizes. */
+ top_line = 31;
+ bot_line = 0;
+ }
+ else /* WIDTH is positive */
+ {
+ if (start_line != DEFAULT_CURSOR_START)
+ bot_line = start_line;
+ top_line = bot_line - (width - 1);
+ }
+
+ /* If the current cursor shape is already what they want, we are
+ history here. */
+ desired_cursor = ((top_line & 0x1f) << 8) | (bot_line & 0x1f);
+ if (desired_cursor == _farpeekw (_dos_ds, 0x460))
+ return;
+
+ regs.h.ah = 1;
+ regs.x.cx = desired_cursor;
+ __dpmi_int (0x10, ®s);
+ #endif /* __DJGPP__ > 1 */
+ }
+
+ static void
+ IT_set_cursor_type (struct frame *f, Lisp_Object cursor_type)
+ {
+ if (EQ (cursor_type, Qbar) || EQ (cursor_type, Qhbar))
+ {
+ /* Just BAR means the normal EGA/VGA cursor. */
+ msdos_set_cursor_shape (f, DEFAULT_CURSOR_START, DEFAULT_CURSOR_WIDTH);
+ }
+ else if (CONSP (cursor_type)
+ && (EQ (XCAR (cursor_type), Qbar)
+ || EQ (XCAR (cursor_type), Qhbar)))
+ {
+ Lisp_Object bar_parms = XCDR (cursor_type);
+ int width;
+
+ if (INTEGERP (bar_parms))
+ {
+ /* Feature: negative WIDTH means cursor at the top
+ of the character cell, zero means invisible cursor. */
+ width = XINT (bar_parms);
+ msdos_set_cursor_shape (f, width >= 0 ? DEFAULT_CURSOR_START : 0,
+ width);
+ }
+ else if (CONSP (bar_parms)
+ && INTEGERP (XCAR (bar_parms))
+ && INTEGERP (XCDR (bar_parms)))
+ {
+ int start_line = XINT (XCDR (bar_parms));
+
+ width = XINT (XCAR (bar_parms));
+ msdos_set_cursor_shape (f, start_line, width);
+ }
+ }
+ else
+ /* Treat anything unknown as "box cursor". This includes nil, so
+ that a frame which doesn't specify a cursor type gets a box,
+ which is the default in Emacs. */
+ msdos_set_cursor_shape (f, 0, BOX_CURSOR_WIDTH);
+ }
+
+ static void
+ IT_ring_bell (void)
+ {
+ if (visible_bell)
+ {
+ mouse_off ();
+ ScreenVisualBell ();
+ }
+ else
+ {
+ union REGS inregs, outregs;
+ inregs.h.ah = 2;
+ inregs.h.dl = 7;
+ intdos (&inregs, &outregs);
+ }
+ }
+
+ /* Given a face id FACE, extract the face parameters to be used for
+ display until the face changes. The face parameters (actually, its
+ color) are used to construct the video attribute byte for each
+ glyph during the construction of the buffer that is then blitted to
+ the video RAM. */
+ static void
+ IT_set_face (int face)
+ {
+ struct frame *sf = SELECTED_FRAME();
+ struct face *fp = FACE_FROM_ID (sf, face);
+ struct face *dfp = FACE_FROM_ID (sf, DEFAULT_FACE_ID);
+ unsigned long fg, bg, dflt_fg, dflt_bg;
+
+ if (!fp)
+ {
+ fp = dfp;
+ /* The default face for the frame should always be realized and
+ cached. */
+ if (!fp)
+ abort ();
+ }
+ screen_face = face;
+ fg = fp->foreground;
+ bg = fp->background;
+ dflt_fg = dfp->foreground;
+ dflt_bg = dfp->background;
+
+ /* Don't use invalid colors. In particular, FACE_TTY_DEFAULT_* colors
+ mean use the colors of the default face. Note that we assume all
+ 16 colors to be available for the background, since Emacs switches
+ on this mode (and loses the blinking attribute) at startup. */
+ if (fg == FACE_TTY_DEFAULT_COLOR || fg == FACE_TTY_DEFAULT_FG_COLOR)
+ fg = FRAME_FOREGROUND_PIXEL (sf);
+ else if (fg == FACE_TTY_DEFAULT_BG_COLOR)
+ fg = FRAME_BACKGROUND_PIXEL (sf);
+ if (bg == FACE_TTY_DEFAULT_COLOR || bg == FACE_TTY_DEFAULT_BG_COLOR)
+ bg = FRAME_BACKGROUND_PIXEL (sf);
+ else if (bg == FACE_TTY_DEFAULT_FG_COLOR)
+ bg = FRAME_FOREGROUND_PIXEL (sf);
+
+ /* Make sure highlighted lines really stand out, come what may. */
+ if (fp->tty_reverse_p && (fg == dflt_fg && bg == dflt_bg))
+ {
+ unsigned long tem = fg;
+
+ fg = bg;
+ bg = tem;
+ }
+ /* If the user requested inverse video, obey. */
+ if (inverse_video)
+ {
+ unsigned long tem2 = fg;
+
+ fg = bg;
+ bg = tem2;
+ }
+ if (termscript)
+ fprintf (termscript, "<FACE %d: %d/%d[FG:%d/BG:%d]>", face,
+ fp->foreground, fp->background, fg, bg);
+ if (fg >= 0 && fg < 16)
+ {
+ ScreenAttrib &= 0xf0;
+ ScreenAttrib |= fg;
+ }
+ if (bg >= 0 && bg < 16)
+ {
+ ScreenAttrib &= 0x0f;
+ ScreenAttrib |= ((bg & 0x0f) << 4);
+ }
+ }
+
+ Lisp_Object Vdos_unsupported_char_glyph;
+
+ static void
+ IT_write_glyphs (struct glyph *str, int str_len)
+ {
+ unsigned char *screen_buf, *screen_bp, *screen_buf_end, *bp;
+ int unsupported_face = FAST_GLYPH_FACE (Vdos_unsupported_char_glyph);
+ unsigned unsupported_char= FAST_GLYPH_CHAR (Vdos_unsupported_char_glyph);
+ int offset = 2 * (new_pos_X + screen_size_X * new_pos_Y);
+ register int sl = str_len;
+ register int tlen = GLYPH_TABLE_LENGTH;
+ register Lisp_Object *tbase = GLYPH_TABLE_BASE;
+
+ /* If terminal_coding does any conversion, use it, otherwise use
+ safe_terminal_coding. We can't use CODING_REQUIRE_ENCODING here
+ because it always returns 1 if terminal_coding.src_multibyte is 1. */
+ struct coding_system *coding =
+ (terminal_coding.common_flags & CODING_REQUIRE_ENCODING_MASK
+ ? &terminal_coding
+ : &safe_terminal_coding);
+ struct frame *sf;
+
+ /* Do we need to consider conversion of unibyte characters to
+ multibyte? */
+ int convert_unibyte_characters
+ = (NILP (current_buffer->enable_multibyte_characters)
+ && unibyte_display_via_language_environment);
+
+ unsigned char conversion_buffer[256];
+ int conversion_buffer_size = sizeof conversion_buffer;
+
+ if (str_len <= 0) return;
+
+ screen_buf = screen_bp = alloca (str_len * 2);
+ screen_buf_end = screen_buf + str_len * 2;
+ sf = SELECTED_FRAME();
+
+ /* Since faces get cached and uncached behind our back, we can't
+ rely on their indices in the cache being consistent across
+ invocations. So always reset the screen face to the default
+ face of the frame, before writing glyphs, and let the glyphs
+ set the right face if it's different from the default. */
+ IT_set_face (DEFAULT_FACE_ID);
+
+ /* The mode bit CODING_MODE_LAST_BLOCK should be set to 1 only at
+ the tail. */
+ terminal_coding.mode &= ~CODING_MODE_LAST_BLOCK;
+ while (sl)
+ {
+ int cf, chlen, enclen;
+ unsigned char workbuf[MAX_MULTIBYTE_LENGTH], *buf;
+ unsigned ch;
+
+ /* Glyphs with GLYPH_MASK_PADDING bit set are actually there
+ only for the redisplay code to know how many columns does
+ this character occupy on the screen. Skip padding glyphs. */
+ if (CHAR_GLYPH_PADDING_P (*str))
+ {
+ str++;
+ sl--;
+ }
+ else
+ {
+ register GLYPH g = GLYPH_FROM_CHAR_GLYPH (*str);
+ int glyph_not_in_table = 0;
+
+ /* If g is negative, it means we have a multibyte character
+ in *str. That's what GLYPH_FROM_CHAR_GLYPH returns for
+ multibyte characters. */
+ if (g < 0 || g >= tlen)
+ {
+ /* This glyph doesn't have an entry in Vglyph_table. */
+ ch = str->u.ch;
+ glyph_not_in_table = 1;
+ }
+ else
+ {
+ /* This glyph has an entry in Vglyph_table, so process
+ any aliases before testing for simpleness. */
+ GLYPH_FOLLOW_ALIASES (tbase, tlen, g);
+ ch = FAST_GLYPH_CHAR (g);
+ }
+
+ /* Convert the character code to multibyte, if they
+ requested display via language environment. We only want
+ to convert unibyte characters to multibyte in unibyte
+ buffers! Otherwise, the 8-bit value in CH came from the
+ display table set up to display foreign characters. */
+ if (SINGLE_BYTE_CHAR_P (ch) && convert_unibyte_characters
+ && (ch >= 0240
+ || (ch >= 0200 && !NILP (Vnonascii_translation_table))))
+ ch = unibyte_char_to_multibyte (ch);
+
+ /* Invalid characters are displayed with a special glyph. */
+ if (! CHAR_VALID_P (ch, 0))
+ {
+ g = !NILP (Vdos_unsupported_char_glyph)
+ ? Vdos_unsupported_char_glyph
+ : MAKE_GLYPH (sf, '\177', GLYPH_FACE (sf, g));
+ ch = FAST_GLYPH_CHAR (g);
+ }
+
+ /* If the face of this glyph is different from the current
+ screen face, update the screen attribute byte. */
+ cf = str->face_id;
+ if (cf != screen_face)
+ IT_set_face (cf); /* handles invalid faces gracefully */
+
+ if (glyph_not_in_table || GLYPH_SIMPLE_P (tbase, tlen, g))
+ {
+ /* We generate the multi-byte form of CH in WORKBUF. */
+ chlen = CHAR_STRING (ch, workbuf);
+ buf = workbuf;
+ }
+ else
+ {
+ /* We have a string in Vglyph_table. */
+ chlen = GLYPH_LENGTH (tbase, g);
+ buf = GLYPH_STRING (tbase, g);
+ }
+
+ /* If the character is not multibyte, don't bother converting it. */
+ if (chlen == 1)
+ {
+ *conversion_buffer = (unsigned char)ch;
+ chlen = 0;
+ enclen = 1;
+ }
+ else
+ {
+ coding->src_multibyte = 1;
+ encode_coding (coding, buf, conversion_buffer, chlen,
+ conversion_buffer_size);
+ chlen -= coding->consumed;
+ enclen = coding->produced;
+
+ /* Replace glyph codes that cannot be converted by
+ terminal_coding with Vdos_unsupported_char_glyph. */
+ if (*conversion_buffer == '?')
+ {
+ unsigned char *cbp = conversion_buffer;
+
+ while (cbp < conversion_buffer + enclen && *cbp == '?')
+ *cbp++ = unsupported_char;
+ if (unsupported_face != screen_face)
+ IT_set_face (unsupported_face);
+ }
+ }
+
+ if (enclen + chlen > screen_buf_end - screen_bp)
+ {
+ /* The allocated buffer for screen writes is too small.
+ Flush it and loop again without incrementing STR, so
+ that the next loop will begin with the same glyph. */
+ int nbytes = screen_bp - screen_buf;
+
+ mouse_off_maybe ();
+ dosmemput (screen_buf, nbytes, (int)ScreenPrimary + offset);
+ if (screen_virtual_segment)
+ dosv_refresh_virtual_screen (offset, nbytes / 2);
+ new_pos_X += nbytes / 2;
+ offset += nbytes;
+
+ /* Prepare to reuse the same buffer again. */
+ screen_bp = screen_buf;
+ }
+ else
+ {
+ /* There's enough place in the allocated buffer to add
+ the encoding of this glyph. */
+
+ /* First, copy the encoded bytes. */
+ for (bp = conversion_buffer; enclen--; bp++)
+ {
+ *screen_bp++ = (unsigned char)*bp;
+ *screen_bp++ = ScreenAttrib;
+ if (termscript)
+ fputc (*bp, termscript);
+ }
+
+ /* Now copy the bytes not consumed by the encoding. */
+ if (chlen > 0)
+ {
+ buf += coding->consumed;
+ while (chlen--)
+ {
+ if (termscript)
+ fputc (*buf, termscript);
+ *screen_bp++ = (unsigned char)*buf++;
+ *screen_bp++ = ScreenAttrib;
+ }
+ }
+
+ /* Update STR and its remaining length. */
+ str++;
+ sl--;
+ }
+ }
+ }
+
+ /* Dump whatever is left in the screen buffer. */
+ mouse_off_maybe ();
+ dosmemput (screen_buf, screen_bp - screen_buf, (int)ScreenPrimary + offset);
+ if (screen_virtual_segment)
+ dosv_refresh_virtual_screen (offset, (screen_bp - screen_buf) / 2);
+ new_pos_X += (screen_bp - screen_buf) / 2;
+
+ /* We may have to output some codes to terminate the writing. */
+ if (CODING_REQUIRE_FLUSHING (coding))
+ {
+ coding->mode |= CODING_MODE_LAST_BLOCK;
+ encode_coding (coding, "", conversion_buffer, 0,
conversion_buffer_size);
+ if (coding->produced > 0)
+ {
+ screen_buf = alloca (coding->produced * 2);
+ for (screen_bp = screen_buf, bp = conversion_buffer;
+ coding->produced--; bp++)
+ {
+ *screen_bp++ = (unsigned char)*bp;
+ *screen_bp++ = ScreenAttrib;
+ if (termscript)
+ fputc (*bp, termscript);
+ }
+ offset += screen_bp - screen_buf;
+ mouse_off_maybe ();
+ dosmemput (screen_buf, screen_bp - screen_buf,
+ (int)ScreenPrimary + offset);
+ if (screen_virtual_segment)
+ dosv_refresh_virtual_screen (offset, (screen_bp - screen_buf) / 2);
+ new_pos_X += (screen_bp - screen_buf) / 2;
+ }
+ }
+ }
+
+ /************************************************************************
+ Mouse Highlight (and friends..)
+ ************************************************************************/
+
+ /* Last window where we saw the mouse. Used by mouse-autoselect-window. */
+ static Lisp_Object last_mouse_window;
+
+ static int mouse_preempted = 0; /* non-zero when XMenu gobbles mouse
events */
+
+ /* Set the mouse pointer shape according to whether it is in the
+ area where the mouse highlight is in effect. */
+ static void
+ IT_set_mouse_pointer (int mode)
+ {
+ /* A no-op for now. DOS text-mode mouse pointer doesn't offer too
+ many possibilities to change its shape, and the available
+ functionality pretty much sucks (e.g., almost every reasonable
+ shape will conceal the character it is on). Since the color of
+ the pointer changes in the highlighted area, it is not clear to
+ me whether anything else is required, anyway. */
+ }
+
+ /* Display the active region described by mouse_face_*
+ in its mouse-face if HL > 0, in its normal face if HL = 0. */
+ static void
+ show_mouse_face (struct display_info *dpyinfo, int hl)
+ {
+ struct window *w = XWINDOW (dpyinfo->mouse_face_window);
+ struct frame *f = XFRAME (WINDOW_FRAME (w));
+ int i;
+ struct face *fp;
+
+
+ /* If window is in the process of being destroyed, don't bother
+ doing anything. */
+ if (w->current_matrix == NULL)
+ goto set_cursor_shape;
+
+ /* Recognize when we are called to operate on rows that don't exist
+ anymore. This can happen when a window is split. */
+ if (dpyinfo->mouse_face_end_row >= w->current_matrix->nrows)
+ goto set_cursor_shape;
+
+ /* There's no sense to do anything if the mouse face isn't realized. */
+ if (hl > 0)
+ {
+ if (dpyinfo->mouse_face_hidden)
+ goto set_cursor_shape;
+
+ fp = FACE_FROM_ID (SELECTED_FRAME(), dpyinfo->mouse_face_face_id);
+ if (!fp)
+ goto set_cursor_shape;
+ }
+
+ /* Note that mouse_face_beg_row etc. are window relative. */
+ for (i = dpyinfo->mouse_face_beg_row;
+ i <= dpyinfo->mouse_face_end_row;
+ i++)
+ {
+ int start_hpos, end_hpos;
+ struct glyph_row *row = MATRIX_ROW (w->current_matrix, i);
+
+ /* Don't do anything if row doesn't have valid contents. */
+ if (!row->enabled_p)
+ continue;
+
+ /* For all but the first row, the highlight starts at column 0. */
+ if (i == dpyinfo->mouse_face_beg_row)
+ start_hpos = dpyinfo->mouse_face_beg_col;
+ else
+ start_hpos = 0;
+
+ if (i == dpyinfo->mouse_face_end_row)
+ end_hpos = dpyinfo->mouse_face_end_col;
+ else
+ end_hpos = row->used[TEXT_AREA];
+
+ if (end_hpos <= start_hpos)
+ continue;
+ /* Record that some glyphs of this row are displayed in
+ mouse-face. */
+ row->mouse_face_p = hl > 0;
+ if (hl > 0)
+ {
+ int vpos = row->y + WINDOW_TOP_EDGE_Y (w);
+ int kstart = start_hpos + WINDOW_LEFT_EDGE_X (w);
+ int nglyphs = end_hpos - start_hpos;
+ int offset = ScreenPrimary + 2*(vpos*screen_size_X + kstart) + 1;
+ int start_offset = offset;
+
+ if (termscript)
+ fprintf (termscript, "\n<MH+ %d-%d:%d>",
+ kstart, kstart + nglyphs - 1, vpos);
+
+ mouse_off ();
+ IT_set_face (dpyinfo->mouse_face_face_id);
+ /* Since we are going to change only the _colors_ of the
+ displayed text, there's no need to go through all the
+ pain of generating and encoding the text from the glyphs.
+ Instead, we simply poke the attribute byte of each
+ affected position in video memory with the colors
+ computed by IT_set_face! */
+ _farsetsel (_dos_ds);
+ while (nglyphs--)
+ {
+ _farnspokeb (offset, ScreenAttrib);
+ offset += 2;
+ }
+ if (screen_virtual_segment)
+ dosv_refresh_virtual_screen (start_offset, end_hpos - start_hpos);
+ mouse_on ();
+ }
+ else
+ {
+ /* We are removing a previously-drawn mouse highlight. The
+ safest way to do so is to redraw the glyphs anew, since
+ all kinds of faces and display tables could have changed
+ behind our back. */
+ int nglyphs = end_hpos - start_hpos;
+ int save_x = new_pos_X, save_y = new_pos_Y;
+
+ if (end_hpos >= row->used[TEXT_AREA])
+ nglyphs = row->used[TEXT_AREA] - start_hpos;
+
+ /* IT_write_glyphs writes at cursor position, so we need to
+ temporarily move cursor coordinates to the beginning of
+ the highlight region. */
+ new_pos_X = start_hpos + WINDOW_LEFT_EDGE_X (w);
+ new_pos_Y = row->y + WINDOW_TOP_EDGE_Y (w);
+
+ if (termscript)
+ fprintf (termscript, "<MH- %d-%d:%d>",
+ new_pos_X, new_pos_X + nglyphs - 1, new_pos_Y);
+ IT_write_glyphs (row->glyphs[TEXT_AREA] + start_hpos, nglyphs);
+ if (termscript)
+ fputs ("\n", termscript);
+ new_pos_X = save_x;
+ new_pos_Y = save_y;
+ }
+ }
+
+ set_cursor_shape:
+ /* Change the mouse pointer shape. */
+ IT_set_mouse_pointer (hl);
+ }
+
+ /* Clear out the mouse-highlighted active region.
+ Redraw it un-highlighted first. */
+ static void
+ clear_mouse_face (struct display_info *dpyinfo)
+ {
+ if (! NILP (dpyinfo->mouse_face_window))
+ show_mouse_face (dpyinfo, 0);
+
+ dpyinfo->mouse_face_beg_row = dpyinfo->mouse_face_beg_col = -1;
+ dpyinfo->mouse_face_end_row = dpyinfo->mouse_face_end_col = -1;
+ dpyinfo->mouse_face_window = Qnil;
+ }
+
+ /* Find the glyph matrix position of buffer position POS in window W.
+ *HPOS and *VPOS are set to the positions found. W's current glyphs
+ must be up to date. If POS is above window start return (0, 0).
+ If POS is after end of W, return end of last line in W. */
+ static int
+ fast_find_position (struct window *w, int pos, int *hpos, int *vpos)
+ {
+ int i, lastcol, line_start_position, maybe_next_line_p = 0;
+ int yb = window_text_bottom_y (w);
+ struct glyph_row *row = MATRIX_ROW (w->current_matrix, 0), *best_row = row;
+
+ while (row->y < yb)
+ {
+ if (row->used[TEXT_AREA])
+ line_start_position = row->glyphs[TEXT_AREA]->charpos;
+ else
+ line_start_position = 0;
+
+ if (line_start_position > pos)
+ break;
+ /* If the position sought is the end of the buffer,
+ don't include the blank lines at the bottom of the window. */
+ else if (line_start_position == pos
+ && pos == BUF_ZV (XBUFFER (w->buffer)))
+ {
+ maybe_next_line_p = 1;
+ break;
+ }
+ else if (line_start_position > 0)
+ best_row = row;
+
+ /* Don't overstep the last matrix row, lest we get into the
+ never-never land... */
+ if (row->y + 1 >= yb)
+ break;
+
+ ++row;
+ }
+
+ /* Find the right column within BEST_ROW. */
+ lastcol = 0;
+ row = best_row;
+ for (i = 0; i < row->used[TEXT_AREA]; i++)
+ {
+ struct glyph *glyph = row->glyphs[TEXT_AREA] + i;
+ int charpos;
+
+ charpos = glyph->charpos;
+ if (charpos == pos)
+ {
+ *hpos = i;
+ *vpos = row->y;
+ return 1;
+ }
+ else if (charpos > pos)
+ break;
+ else if (charpos > 0)
+ lastcol = i;
+ }
+
+ /* If we're looking for the end of the buffer,
+ and we didn't find it in the line we scanned,
+ use the start of the following line. */
+ if (maybe_next_line_p)
+ {
+ ++row;
+ lastcol = 0;
+ }
+
+ *vpos = row->y;
+ *hpos = lastcol + 1;
+ return 0;
+ }
+
+ /* Take proper action when mouse has moved to the mode or top line of
+ window W, x-position X. MODE_LINE_P non-zero means mouse is on the
+ mode line. X is relative to the start of the text display area of
+ W, so the width of fringes and scroll bars must be subtracted
+ to get a position relative to the start of the mode line. */
+ static void
+ IT_note_mode_line_highlight (struct window *w, int x, int mode_line_p)
+ {
+ struct frame *f = XFRAME (w->frame);
+ struct display_info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
+ struct glyph_row *row;
+
+ if (mode_line_p)
+ row = MATRIX_MODE_LINE_ROW (w->current_matrix);
+ else
+ row = MATRIX_HEADER_LINE_ROW (w->current_matrix);
+
+ if (row->enabled_p)
+ {
+ extern Lisp_Object Qhelp_echo;
+ struct glyph *glyph, *end;
+ Lisp_Object help, map;
+
+ /* Find the glyph under X. */
+ glyph = (row->glyphs[TEXT_AREA]
+ + x
+ /* Does MS-DOG really support scroll-bars?? ++KFS */
+ - WINDOW_LEFT_SCROLL_BAR_AREA_WIDTH (w));
+ end = glyph + row->used[TEXT_AREA];
+ if (glyph < end
+ && STRINGP (glyph->object)
+ && STRING_INTERVALS (glyph->object)
+ && glyph->charpos >= 0
+ && glyph->charpos < SCHARS (glyph->object))
+ {
+ /* If we're on a string with `help-echo' text property,
+ arrange for the help to be displayed. This is done by
+ setting the global variable help_echo to the help string. */
+ help = Fget_text_property (make_number (glyph->charpos),
+ Qhelp_echo, glyph->object);
+ if (!NILP (help))
+ {
+ help_echo_string = help;
+ XSETWINDOW (help_echo_window, w);
+ help_echo_object = glyph->object;
+ help_echo_pos = glyph->charpos;
+ }
+ }
+ }
+ }
+
+ /* Take proper action when the mouse has moved to position X, Y on
+ frame F as regards highlighting characters that have mouse-face
+ properties. Also de-highlighting chars where the mouse was before.
+ X and Y can be negative or out of range. */
+ static void
+ IT_note_mouse_highlight (struct frame *f, int x, int y)
+ {
+ struct display_info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
+ enum window_part part = ON_NOTHING;
+ Lisp_Object window;
+ struct window *w;
+
+ /* When a menu is active, don't highlight because this looks odd. */
+ if (mouse_preempted)
+ return;
+
+ if (NILP (Vmouse_highlight)
+ || !f->glyphs_initialized_p)
+ return;
+
+ dpyinfo->mouse_face_mouse_x = x;
+ dpyinfo->mouse_face_mouse_y = y;
+ dpyinfo->mouse_face_mouse_frame = f;
+
+ if (dpyinfo->mouse_face_defer)
+ return;
+
+ if (gc_in_progress)
+ {
+ dpyinfo->mouse_face_deferred_gc = 1;
+ return;
+ }
+
+ /* Which window is that in? */
+ window = window_from_coordinates (f, x, y, &part, &x, &y, 0);
+
+ /* If we were displaying active text in another window, clear that. */
+ if (! EQ (window, dpyinfo->mouse_face_window))
+ clear_mouse_face (dpyinfo);
+
+ /* Not on a window -> return. */
+ if (!WINDOWP (window))
+ return;
+
+ /* Convert to window-relative coordinates. */
+ w = XWINDOW (window);
+
+ if (part == ON_MODE_LINE || part == ON_HEADER_LINE)
+ {
+ /* Mouse is on the mode or top line. */
+ IT_note_mode_line_highlight (w, x, part == ON_MODE_LINE);
+ return;
+ }
+
+ IT_set_mouse_pointer (0);
+
+ /* Are we in a window whose display is up to date?
+ And verify the buffer's text has not changed. */
+ if (part == ON_TEXT
+ && EQ (w->window_end_valid, w->buffer)
+ && XFASTINT (w->last_modified) == BUF_MODIFF (XBUFFER (w->buffer))
+ && (XFASTINT (w->last_overlay_modified)
+ == BUF_OVERLAY_MODIFF (XBUFFER (w->buffer))))
+ {
+ int pos, i, nrows = w->current_matrix->nrows;
+ struct glyph_row *row;
+ struct glyph *glyph;
+
+ /* Find the glyph under X/Y. */
+ glyph = NULL;
+ if (y >= 0 && y < nrows)
+ {
+ row = MATRIX_ROW (w->current_matrix, y);
+ /* Give up if some row before the one we are looking for is
+ not enabled. */
+ for (i = 0; i <= y; i++)
+ if (!MATRIX_ROW (w->current_matrix, i)->enabled_p)
+ break;
+ if (i > y /* all rows upto and including the one at Y are enabled */
+ && row->displays_text_p
+ && x < window_box_width (w, TEXT_AREA))
+ {
+ glyph = row->glyphs[TEXT_AREA];
+ if (x >= row->used[TEXT_AREA])
+ glyph = NULL;
+ else
+ {
+ glyph += x;
+ if (!BUFFERP (glyph->object))
+ glyph = NULL;
+ }
+ }
+ }
+
+ /* Clear mouse face if X/Y not over text. */
+ if (glyph == NULL)
+ {
+ clear_mouse_face (dpyinfo);
+ return;
+ }
+
+ if (!BUFFERP (glyph->object))
+ abort ();
+ pos = glyph->charpos;
+
+ /* Check for mouse-face and help-echo. */
+ {
+ extern Lisp_Object Qmouse_face;
+ Lisp_Object mouse_face, overlay, position, *overlay_vec;
+ int len, noverlays, obegv, ozv;;
+ struct buffer *obuf;
+
+ /* If we get an out-of-range value, return now; avoid an error. */
+ if (pos > BUF_Z (XBUFFER (w->buffer)))
+ return;
+
+ /* Make the window's buffer temporarily current for
+ overlays_at and compute_char_face. */
+ obuf = current_buffer;
+ current_buffer = XBUFFER (w->buffer);
+ obegv = BEGV;
+ ozv = ZV;
+ BEGV = BEG;
+ ZV = Z;
+
+ /* Is this char mouse-active or does it have help-echo? */
+ XSETINT (position, pos);
+
+ /* Put all the overlays we want in a vector in overlay_vec.
+ Store the length in len. If there are more than 10, make
+ enough space for all, and try again. */
+ len = 10;
+ overlay_vec = (Lisp_Object *) alloca (len * sizeof (Lisp_Object));
+ noverlays = overlays_at (pos, 0, &overlay_vec, &len, NULL, NULL, 0);
+ if (noverlays > len)
+ {
+ len = noverlays;
+ overlay_vec = (Lisp_Object *) alloca (len * sizeof (Lisp_Object));
+ noverlays = overlays_at (pos,
+ 0, &overlay_vec, &len, NULL, NULL, 0);
+ }
+
+ /* Sort overlays into increasing priority order. */
+ noverlays = sort_overlays (overlay_vec, noverlays, w);
+
+ /* Check mouse-face highlighting. */
+ if (! (EQ (window, dpyinfo->mouse_face_window)
+ && y >= dpyinfo->mouse_face_beg_row
+ && y <= dpyinfo->mouse_face_end_row
+ && (y > dpyinfo->mouse_face_beg_row
+ || x >= dpyinfo->mouse_face_beg_col)
+ && (y < dpyinfo->mouse_face_end_row
+ || x < dpyinfo->mouse_face_end_col
+ || dpyinfo->mouse_face_past_end)))
+ {
+ /* Clear the display of the old active region, if any. */
+ clear_mouse_face (dpyinfo);
+
+ /* Find highest priority overlay that has a mouse-face prop. */
+ overlay = Qnil;
+ for (i = noverlays - 1; i >= 0; --i)
+ {
+ mouse_face = Foverlay_get (overlay_vec[i], Qmouse_face);
+ if (!NILP (mouse_face))
+ {
+ overlay = overlay_vec[i];
+ break;
+ }
+ }
+
+ /* If no overlay applies, get a text property. */
+ if (NILP (overlay))
+ mouse_face = Fget_text_property (position, Qmouse_face,
+ w->buffer);
+
+ /* Handle the overlay case. */
+ if (! NILP (overlay))
+ {
+ /* Find the range of text around this char that
+ should be active. */
+ Lisp_Object before, after;
+ int ignore;
+
+ before = Foverlay_start (overlay);
+ after = Foverlay_end (overlay);
+ /* Record this as the current active region. */
+ fast_find_position (w, XFASTINT (before),
+ &dpyinfo->mouse_face_beg_col,
+ &dpyinfo->mouse_face_beg_row);
+ dpyinfo->mouse_face_past_end
+ = !fast_find_position (w, XFASTINT (after),
+ &dpyinfo->mouse_face_end_col,
+ &dpyinfo->mouse_face_end_row);
+ dpyinfo->mouse_face_window = window;
+ dpyinfo->mouse_face_face_id
+ = face_at_buffer_position (w, pos, 0, 0,
+ &ignore, pos + 1,
+ !dpyinfo->mouse_face_hidden);
+
+ /* Display it as active. */
+ show_mouse_face (dpyinfo, 1);
+ }
+ /* Handle the text property case. */
+ else if (! NILP (mouse_face))
+ {
+ /* Find the range of text around this char that
+ should be active. */
+ Lisp_Object before, after, beginning, end;
+ int ignore;
+
+ beginning = Fmarker_position (w->start);
+ XSETINT (end, (BUF_Z (XBUFFER (w->buffer))
+ - XFASTINT (w->window_end_pos)));
+ before
+ = Fprevious_single_property_change (make_number (pos + 1),
+ Qmouse_face,
+ w->buffer, beginning);
+ after
+ = Fnext_single_property_change (position, Qmouse_face,
+ w->buffer, end);
+ /* Record this as the current active region. */
+ fast_find_position (w, XFASTINT (before),
+ &dpyinfo->mouse_face_beg_col,
+ &dpyinfo->mouse_face_beg_row);
+ dpyinfo->mouse_face_past_end
+ = !fast_find_position (w, XFASTINT (after),
+ &dpyinfo->mouse_face_end_col,
+ &dpyinfo->mouse_face_end_row);
+ dpyinfo->mouse_face_window = window;
+ dpyinfo->mouse_face_face_id
+ = face_at_buffer_position (w, pos, 0, 0,
+ &ignore, pos + 1,
+ !dpyinfo->mouse_face_hidden);
+
+ /* Display it as active. */
+ show_mouse_face (dpyinfo, 1);
+ }
+ }
+
+ /* Look for a `help-echo' property. */
+ {
+ Lisp_Object help;
+ extern Lisp_Object Qhelp_echo;
+
+ /* Check overlays first. */
+ help = Qnil;
+ for (i = noverlays - 1; i >= 0 && NILP (help); --i)
+ {
+ overlay = overlay_vec[i];
+ help = Foverlay_get (overlay, Qhelp_echo);
+ }
+
+ if (!NILP (help))
+ {
+ help_echo_string = help;
+ help_echo_window = window;
+ help_echo_object = overlay;
+ help_echo_pos = pos;
+ }
+ /* Try text properties. */
+ else if (NILP (help)
+ && ((STRINGP (glyph->object)
+ && glyph->charpos >= 0
+ && glyph->charpos < SCHARS (glyph->object))
+ || (BUFFERP (glyph->object)
+ && glyph->charpos >= BEGV
+ && glyph->charpos < ZV)))
+ {
+ help = Fget_text_property (make_number (glyph->charpos),
+ Qhelp_echo, glyph->object);
+ if (!NILP (help))
+ {
+ help_echo_string = help;
+ help_echo_window = window;
+ help_echo_object = glyph->object;
+ help_echo_pos = glyph->charpos;
+ }
+ }
+ }
+
+ BEGV = obegv;
+ ZV = ozv;
+ current_buffer = obuf;
+ }
+ }
+ }
+
+ static void
+ IT_clear_end_of_line (int first_unused)
+ {
+ char *spaces, *sp;
+ int i, j, offset = 2 * (new_pos_X + screen_size_X * new_pos_Y);
+ extern int fatal_error_in_progress;
+
+ if (new_pos_X >= first_unused || fatal_error_in_progress)
+ return;
+
+ IT_set_face (0);
+ i = (j = first_unused - new_pos_X) * 2;
+ if (termscript)
+ fprintf (termscript, "<CLR:EOL[%d..%d)>", new_pos_X, first_unused);
+ spaces = sp = alloca (i);
+
+ while (--j >= 0)
+ {
+ *sp++ = ' ';
+ *sp++ = ScreenAttrib;
+ }
+
+ mouse_off_maybe ();
+ dosmemput (spaces, i, (int)ScreenPrimary + offset);
+ if (screen_virtual_segment)
+ dosv_refresh_virtual_screen (offset, i / 2);
+
+ /* clear_end_of_line_raw on term.c leaves the cursor at first_unused.
+ Let's follow their lead, in case someone relies on this. */
+ new_pos_X = first_unused;
+ }
+
+ static void
+ IT_clear_screen (void)
+ {
+ if (termscript)
+ fprintf (termscript, "<CLR:SCR>");
+ /* We are sometimes called (from clear_garbaged_frames) when a new
+ frame is being created, but its faces are not yet realized. In
+ such a case we cannot call IT_set_face, since it will fail to find
+ any valid faces and will abort. Instead, use the initial screen
+ colors; that should mimic what a Unix tty does, which simply clears
+ the screen with whatever default colors are in use. */
+ if (FACE_FROM_ID (SELECTED_FRAME (), DEFAULT_FACE_ID) == NULL)
+ ScreenAttrib = (initial_screen_colors[0] << 4) | initial_screen_colors[1];
+ else
+ IT_set_face (0);
+ mouse_off ();
+ ScreenClear ();
+ if (screen_virtual_segment)
+ dosv_refresh_virtual_screen (0, screen_size);
+ new_pos_X = new_pos_Y = 0;
+ }
+
+ static void
+ IT_clear_to_end (void)
+ {
+ if (termscript)
+ fprintf (termscript, "<CLR:EOS>");
+
+ while (new_pos_Y < screen_size_Y) {
+ new_pos_X = 0;
+ IT_clear_end_of_line (screen_size_X);
+ new_pos_Y++;
+ }
+ }
+
+ static void
+ IT_cursor_to (int y, int x)
+ {
+ if (termscript)
+ fprintf (termscript, "\n<XY=%dx%d>", x, y);
+ new_pos_X = x;
+ new_pos_Y = y;
+ }
+
+ static int cursor_cleared;
+
+ static void
+ IT_display_cursor (int on)
+ {
+ if (on && cursor_cleared)
+ {
+ ScreenSetCursor (current_pos_Y, current_pos_X);
+ cursor_cleared = 0;
+ }
+ else if (!on && !cursor_cleared)
+ {
+ ScreenSetCursor (-1, -1);
+ cursor_cleared = 1;
+ }
+ }
+
+ /* Emacs calls cursor-movement functions a lot when it updates the
+ display (probably a legacy of old terminals where you cannot
+ update a screen line without first moving the cursor there).
+ However, cursor movement is expensive on MSDOS (it calls a slow
+ BIOS function and requires 2 mode switches), while actual screen
+ updates access the video memory directly and don't depend on
+ cursor position. To avoid slowing down the redisplay, we cheat:
+ all functions that move the cursor only set internal variables
+ which record the cursor position, whereas the cursor is only
+ moved to its final position whenever screen update is complete.
+
+ `IT_cmgoto' is called from the keyboard reading loop and when the
+ frame update is complete. This means that we are ready for user
+ input, so we update the cursor position to show where the point is,
+ and also make the mouse pointer visible.
+
+ Special treatment is required when the cursor is in the echo area,
+ to put the cursor at the end of the text displayed there. */
+
+ static void
+ IT_cmgoto (FRAME_PTR f)
+ {
+ /* Only set the cursor to where it should be if the display is
+ already in sync with the window contents. */
+ int update_cursor_pos = 1; /* MODIFF == unchanged_modified; */
+
+ /* FIXME: This needs to be rewritten for the new redisplay, or
+ removed. */
+ #if 0
+ static int previous_pos_X = -1;
+
+ update_cursor_pos = 1; /* temporary!!! */
+
+ /* If the display is in sync, forget any previous knowledge about
+ cursor position. This is primarily for unexpected events like
+ C-g in the minibuffer. */
+ if (update_cursor_pos && previous_pos_X >= 0)
+ previous_pos_X = -1;
+ /* If we are in the echo area, put the cursor at the
+ end of the echo area message. */
+ if (!update_cursor_pos
+ && WINDOW_TOP_EDGE_LINE (XWINDOW (FRAME_MINIBUF_WINDOW (f))) <=
new_pos_Y)
+ {
+ int tem_X = current_pos_X, dummy;
+
+ if (echo_area_glyphs)
+ {
+ tem_X = echo_area_glyphs_length;
+ /* Save current cursor position, to be restored after the
+ echo area message is erased. Only remember one level
+ of previous cursor position. */
+ if (previous_pos_X == -1)
+ ScreenGetCursor (&dummy, &previous_pos_X);
+ }
+ else if (previous_pos_X >= 0)
+ {
+ /* We wind up here after the echo area message is erased.
+ Restore the cursor position we remembered above. */
+ tem_X = previous_pos_X;
+ previous_pos_X = -1;
+ }
+
+ if (current_pos_X != tem_X)
+ {
+ new_pos_X = tem_X;
+ update_cursor_pos = 1;
+ }
+ }
+ #endif
+
+ if (update_cursor_pos
+ && (current_pos_X != new_pos_X || current_pos_Y != new_pos_Y))
+ {
+ ScreenSetCursor (current_pos_Y = new_pos_Y, current_pos_X = new_pos_X);
+ if (termscript)
+ fprintf (termscript, "\n<CURSOR:%dx%d>", current_pos_X, current_pos_Y);
+ }
+
+ /* Maybe cursor is invisible, so make it visible. */
+ IT_display_cursor (1);
+
+ /* Mouse pointer should be always visible if we are waiting for
+ keyboard input. */
+ if (!mouse_visible)
+ mouse_on ();
+ }
+
+ static void
+ IT_update_begin (struct frame *f)
+ {
+ struct display_info *display_info = FRAME_X_DISPLAY_INFO (f);
+ struct frame *mouse_face_frame = display_info->mouse_face_mouse_frame;
+
+ BLOCK_INPUT;
+
+ if (f && f == mouse_face_frame)
+ {
+ /* Don't do highlighting for mouse motion during the update. */
+ display_info->mouse_face_defer = 1;
+
+ /* If F needs to be redrawn, simply forget about any prior mouse
+ highlighting. */
+ if (FRAME_GARBAGED_P (f))
+ display_info->mouse_face_window = Qnil;
+
+ /* Can we tell that this update does not affect the window
+ where the mouse highlight is? If so, no need to turn off.
+ Likewise, don't do anything if none of the enabled rows
+ contains glyphs highlighted in mouse face. */
+ if (!NILP (display_info->mouse_face_window)
+ && WINDOWP (display_info->mouse_face_window))
+ {
+ struct window *w = XWINDOW (display_info->mouse_face_window);
+ int i;
+
+ /* If the mouse highlight is in the window that was deleted
+ (e.g., if it was popped by completion), clear highlight
+ unconditionally. */
+ if (NILP (w->buffer))
+ display_info->mouse_face_window = Qnil;
+ else
+ {
+ for (i = 0; i < w->desired_matrix->nrows; ++i)
+ if (MATRIX_ROW_ENABLED_P (w->desired_matrix, i)
+ && MATRIX_ROW (w->current_matrix, i)->mouse_face_p)
+ break;
+ }
+
+ if (NILP (w->buffer) || i < w->desired_matrix->nrows)
+ clear_mouse_face (display_info);
+ }
+ }
+ else if (mouse_face_frame && !FRAME_LIVE_P (mouse_face_frame))
+ {
+ /* If the frame with mouse highlight was deleted, invalidate the
+ highlight info. */
+ display_info->mouse_face_beg_row = display_info->mouse_face_beg_col =
-1;
+ display_info->mouse_face_end_row = display_info->mouse_face_end_col =
-1;
+ display_info->mouse_face_window = Qnil;
+ display_info->mouse_face_deferred_gc = 0;
+ display_info->mouse_face_mouse_frame = NULL;
+ }
+
+ UNBLOCK_INPUT;
+ }
+
+ static void
+ IT_update_end (struct frame *f)
+ {
+ FRAME_X_DISPLAY_INFO (f)->mouse_face_defer = 0;
+ }
+
+ Lisp_Object Qcursor_type;
+
+ static void
+ IT_frame_up_to_date (struct frame *f)
+ {
+ struct display_info *dpyinfo = FRAME_X_DISPLAY_INFO (f);
+ Lisp_Object new_cursor, frame_desired_cursor;
+ struct window *sw;
+
+ if (dpyinfo->mouse_face_deferred_gc
+ || (f && f == dpyinfo->mouse_face_mouse_frame))
+ {
+ BLOCK_INPUT;
+ if (dpyinfo->mouse_face_mouse_frame)
+ IT_note_mouse_highlight (dpyinfo->mouse_face_mouse_frame,
+ dpyinfo->mouse_face_mouse_x,
+ dpyinfo->mouse_face_mouse_y);
+ dpyinfo->mouse_face_deferred_gc = 0;
+ UNBLOCK_INPUT;
+ }
+
+ /* Set the cursor type to whatever they wanted. In a minibuffer
+ window, we want the cursor to appear only if we are reading input
+ from this window, and we want the cursor to be taken from the
+ frame parameters. For the selected window, we use either its
+ buffer-local value or the value from the frame parameters if the
+ buffer doesn't define its local value for the cursor type. */
+ sw = XWINDOW (f->selected_window);
+ frame_desired_cursor = Fcdr (Fassq (Qcursor_type, f->param_alist));
+ if (cursor_in_echo_area
+ && FRAME_HAS_MINIBUF_P (f)
+ && EQ (FRAME_MINIBUF_WINDOW (f), echo_area_window)
+ && sw == XWINDOW (echo_area_window))
+ new_cursor = frame_desired_cursor;
+ else
+ {
+ struct buffer *b = XBUFFER (sw->buffer);
+
+ if (EQ (b->cursor_type, Qt))
+ new_cursor = frame_desired_cursor;
+ else if (NILP (b->cursor_type)) /* nil means no cursor */
+ new_cursor = Fcons (Qbar, make_number (0));
+ else
+ new_cursor = b->cursor_type;
+ }
+
+ IT_set_cursor_type (f, new_cursor);
+
+ IT_cmgoto (f); /* position cursor when update is done */
+ }
+
+ /* Copy LEN glyphs displayed on a single line whose vertical position
+ is YPOS, beginning at horizontal position XFROM to horizontal
+ position XTO, by moving blocks in the video memory. Used by
+ functions that insert and delete glyphs. */
+ static void
+ IT_copy_glyphs (int xfrom, int xto, size_t len, int ypos)
+ {
+ /* The offsets of source and destination relative to the
+ conventional memorty selector. */
+ int from = 2 * (xfrom + screen_size_X * ypos) + ScreenPrimary;
+ int to = 2 * (xto + screen_size_X * ypos) + ScreenPrimary;
+
+ if (from == to || len <= 0)
+ return;
+
+ _farsetsel (_dos_ds);
+
+ /* The source and destination might overlap, so we need to move
+ glyphs non-destructively. */
+ if (from > to)
+ {
+ for ( ; len; from += 2, to += 2, len--)
+ _farnspokew (to, _farnspeekw (from));
+ }
+ else
+ {
+ from += (len - 1) * 2;
+ to += (len - 1) * 2;
+ for ( ; len; from -= 2, to -= 2, len--)
+ _farnspokew (to, _farnspeekw (from));
+ }
+ if (screen_virtual_segment)
+ dosv_refresh_virtual_screen (ypos * screen_size_X * 2, screen_size_X);
+ }
+
+ /* Insert and delete glyphs. */
+ static void
+ IT_insert_glyphs (start, len)
+ register struct glyph *start;
+ register int len;
+ {
+ int shift_by_width = screen_size_X - (new_pos_X + len);
+
+ /* Shift right the glyphs from the nominal cursor position to the
+ end of this line. */
+ IT_copy_glyphs (new_pos_X, new_pos_X + len, shift_by_width, new_pos_Y);
+
+ /* Now write the glyphs to be inserted. */
+ IT_write_glyphs (start, len);
+ }
+
+ static void
+ IT_delete_glyphs (n)
+ register int n;
+ {
+ abort ();
+ }
+
+ /* set-window-configuration on window.c needs this. */
+ void
+ x_set_menu_bar_lines (f, value, oldval)
+ struct frame *f;
+ Lisp_Object value, oldval;
+ {
+ set_menu_bar_lines (f, value, oldval);
+ }
+
+ /* This was copied from xfaces.c */
+
+ extern Lisp_Object Qbackground_color;
+ extern Lisp_Object Qforeground_color;
+ Lisp_Object Qreverse;
+ extern Lisp_Object Qtitle;
+
+ /* IT_set_terminal_modes is called when emacs is started,
+ resumed, and whenever the screen is redrawn! */
+
+ static void
+ IT_set_terminal_modes (void)
+ {
+ if (termscript)
+ fprintf (termscript, "\n<SET_TERM>");
+
+ screen_size_X = ScreenCols ();
+ screen_size_Y = ScreenRows ();
+ screen_size = screen_size_X * screen_size_Y;
+
+ new_pos_X = new_pos_Y = 0;
+ current_pos_X = current_pos_Y = -1;
+
+ if (term_setup_done)
+ return;
+ term_setup_done = 1;
+
+ startup_screen_size_X = screen_size_X;
+ startup_screen_size_Y = screen_size_Y;
+ startup_screen_attrib = ScreenAttrib;
+
+ #if __DJGPP__ > 1
+ /* Is DOS/V (or any other RSIS software which relocates
+ the screen) installed? */
+ {
+ unsigned short es_value;
+ __dpmi_regs regs;
+
+ regs.h.ah = 0xfe; /* get relocated screen address */
+ if (ScreenPrimary == 0xb0000UL || ScreenPrimary == 0xb8000UL)
+ regs.x.es = (ScreenPrimary >> 4) & 0xffff;
+ else if (screen_old_address) /* already switched to Japanese mode once */
+ regs.x.es = (screen_old_address >> 4) & 0xffff;
+ else
+ regs.x.es = ScreenMode () == 7 ? 0xb000 : 0xb800;
+ regs.x.di = 0;
+ es_value = regs.x.es;
+ __dpmi_int (0x10, ®s);
+
+ if (regs.x.es != es_value)
+ {
+ /* screen_old_address is only set if ScreenPrimary does NOT
+ already point to the relocated buffer address returned by
+ the Int 10h/AX=FEh call above. DJGPP v2.02 and later sets
+ ScreenPrimary to that address at startup under DOS/V. */
+ if (regs.x.es != (ScreenPrimary >> 4) & 0xffff)
+ screen_old_address = ScreenPrimary;
+ screen_virtual_segment = regs.x.es;
+ screen_virtual_offset = regs.x.di;
+ ScreenPrimary = (screen_virtual_segment << 4) + screen_virtual_offset;
+ }
+ }
+ #endif /* __DJGPP__ > 1 */
+
+ ScreenGetCursor (&startup_pos_Y, &startup_pos_X);
+ ScreenRetrieve (startup_screen_buffer = xmalloc (screen_size * 2));
+
+ if (termscript)
+ fprintf (termscript, "<SCREEN SAVED (dimensions=%dx%d)>\n",
+ screen_size_X, screen_size_Y);
+
+ bright_bg ();
+ }
+
+ /* IT_reset_terminal_modes is called when emacs is
+ suspended or killed. */
+
+ static void
+ IT_reset_terminal_modes (void)
+ {
+ int display_row_start = (int) ScreenPrimary;
+ int saved_row_len = startup_screen_size_X * 2;
+ int update_row_len = ScreenCols () * 2, current_rows = ScreenRows ();
+ int to_next_row = update_row_len;
+ unsigned char *saved_row = startup_screen_buffer;
+ int cursor_pos_X = ScreenCols () - 1, cursor_pos_Y = ScreenRows () - 1;
+
+ if (termscript)
+ fprintf (termscript, "\n<RESET_TERM>");
+
+ if (!term_setup_done)
+ return;
+
+ mouse_off ();
+
+ /* Leave the video system in the same state as we found it,
+ as far as the blink/bright-background bit is concerned. */
+ maybe_enable_blinking ();
+
+ /* We have a situation here.
+ We cannot just do ScreenUpdate(startup_screen_buffer) because
+ the luser could have changed screen dimensions inside Emacs
+ and failed (or didn't want) to restore them before killing
+ Emacs. ScreenUpdate() uses the *current* screen dimensions and
+ thus will happily use memory outside what was allocated for
+ `startup_screen_buffer'.
+ Thus we only restore as much as the current screen dimensions
+ can hold, and clear the rest (if the saved screen is smaller than
+ the current) with the color attribute saved at startup. The cursor
+ is also restored within the visible dimensions. */
+
+ ScreenAttrib = startup_screen_attrib;
+
+ /* Don't restore the screen if we are exiting less than 2 seconds
+ after startup: we might be crashing, and the screen might show
+ some vital clues to what's wrong. */
+ if (clock () - startup_time >= 2*CLOCKS_PER_SEC)
+ {
+ ScreenClear ();
+ if (screen_virtual_segment)
+ dosv_refresh_virtual_screen (0, screen_size);
+
+ if (update_row_len > saved_row_len)
+ update_row_len = saved_row_len;
+ if (current_rows > startup_screen_size_Y)
+ current_rows = startup_screen_size_Y;
+
+ if (termscript)
+ fprintf (termscript, "<SCREEN RESTORED (dimensions=%dx%d)>\n",
+ update_row_len / 2, current_rows);
+
+ while (current_rows--)
+ {
+ dosmemput (saved_row, update_row_len, display_row_start);
+ if (screen_virtual_segment)
+ dosv_refresh_virtual_screen (display_row_start - ScreenPrimary,
+ update_row_len / 2);
+ saved_row += saved_row_len;
+ display_row_start += to_next_row;
+ }
+ }
+ if (startup_pos_X < cursor_pos_X)
+ cursor_pos_X = startup_pos_X;
+ if (startup_pos_Y < cursor_pos_Y)
+ cursor_pos_Y = startup_pos_Y;
+
+ ScreenSetCursor (cursor_pos_Y, cursor_pos_X);
+ xfree (startup_screen_buffer);
+
+ term_setup_done = 0;
+ }
+
+ static void
+ IT_set_terminal_window (int foo)
+ {
+ }
+
+ /* Remember the screen colors of the curent frame, to serve as the
+ default colors for newly-created frames. */
+ DEFUN ("msdos-remember-default-colors", Fmsdos_remember_default_colors,
+ Smsdos_remember_default_colors, 1, 1, 0,
+ doc: /* Remember the screen colors of the current frame. */)
+ (frame)
+ Lisp_Object frame;
+ {
+ struct frame *f;
+
+ CHECK_FRAME (frame);
+ f= XFRAME (frame);
+
+ /* This function is called after applying default-frame-alist to the
+ initial frame. At that time, if reverse-colors option was
+ specified in default-frame-alist, it was already applied, and
+ frame colors are reversed. We need to account for that. */
+ if (EQ (Fcdr (Fassq (Qreverse, f->param_alist)), Qt))
+ {
+ initial_screen_colors[0] = FRAME_BACKGROUND_PIXEL (f);
+ initial_screen_colors[1] = FRAME_FOREGROUND_PIXEL (f);
+ }
+ else
+ {
+ initial_screen_colors[0] = FRAME_FOREGROUND_PIXEL (f);
+ initial_screen_colors[1] = FRAME_BACKGROUND_PIXEL (f);
+ }
+ }
+
+ void
+ IT_set_frame_parameters (f, alist)
+ struct frame *f;
+ Lisp_Object alist;
+ {
+ Lisp_Object tail;
+ int i, j, length = XINT (Flength (alist));
+ Lisp_Object *parms
+ = (Lisp_Object *) alloca (length * sizeof (Lisp_Object));
+ Lisp_Object *values
+ = (Lisp_Object *) alloca (length * sizeof (Lisp_Object));
+ /* Do we have to reverse the foreground and background colors? */
+ int reverse = EQ (Fcdr (Fassq (Qreverse, f->param_alist)), Qt);
+ int need_to_reverse, was_reverse = reverse;
+ int redraw = 0, fg_set = 0, bg_set = 0;
+ unsigned long orig_fg, orig_bg;
+ Lisp_Object frame_bg, frame_fg;
+ extern Lisp_Object Qdefault, QCforeground, QCbackground;
+
+ /* If we are creating a new frame, begin with the original screen colors
+ used for the initial frame. */
+ if (alist == Vdefault_frame_alist
+ && initial_screen_colors[0] != -1 && initial_screen_colors[1] != -1)
+ {
+ FRAME_FOREGROUND_PIXEL (f) = initial_screen_colors[0];
+ FRAME_BACKGROUND_PIXEL (f) = initial_screen_colors[1];
+ }
+ orig_fg = FRAME_FOREGROUND_PIXEL (f);
+ orig_bg = FRAME_BACKGROUND_PIXEL (f);
+ frame_fg = Fcdr (Fassq (Qforeground_color, f->param_alist));
+ frame_bg = Fcdr (Fassq (Qbackground_color, f->param_alist));
+ /* frame_fg and frame_bg could be nil if, for example,
+ f->param_alist is nil, e.g. if we are called from
+ Fmake_terminal_frame. */
+ if (NILP (frame_fg))
+ frame_fg = build_string (unspecified_fg);
+ if (NILP (frame_bg))
+ frame_bg = build_string (unspecified_bg);
+
+ /* Extract parm names and values into those vectors. */
+ i = 0;
+ for (tail = alist; CONSP (tail); tail = Fcdr (tail))
+ {
+ Lisp_Object elt;
+
+ elt = Fcar (tail);
+ parms[i] = Fcar (elt);
+ CHECK_SYMBOL (parms[i]);
+ values[i] = Fcdr (elt);
+ i++;
+ }
+
+ j = i;
+
+ for (i = 0; i < j; i++)
+ {
+ Lisp_Object prop, val;
+
+ prop = parms[i];
+ val = values[i];
+
+ if (EQ (prop, Qreverse))
+ reverse = EQ (val, Qt);
+ }
+
+ need_to_reverse = reverse && !was_reverse;
+ if (termscript && need_to_reverse)
+ fprintf (termscript, "<INVERSE-VIDEO>\n");
+
+ /* Now process the alist elements in reverse of specified order. */
+ for (i--; i >= 0; i--)
+ {
+ Lisp_Object prop, val, frame;
+
+ prop = parms[i];
+ val = values[i];
+
+ if (EQ (prop, Qforeground_color))
+ {
+ unsigned long new_color = load_color (f, NULL, val, need_to_reverse
+ ? LFACE_BACKGROUND_INDEX
+ : LFACE_FOREGROUND_INDEX);
+ if (new_color != FACE_TTY_DEFAULT_COLOR
+ && new_color != FACE_TTY_DEFAULT_FG_COLOR
+ && new_color != FACE_TTY_DEFAULT_BG_COLOR)
+ {
+ FRAME_FOREGROUND_PIXEL (f) = new_color;
+ /* Make sure the foreground of the default face for this
+ frame is changed as well. */
+ XSETFRAME (frame, f);
+ if (need_to_reverse)
+ {
+ Finternal_set_lisp_face_attribute (Qdefault, QCbackground,
+ val, frame);
+ prop = Qbackground_color;
+ bg_set = 1;
+ }
+ else
+ {
+ Finternal_set_lisp_face_attribute (Qdefault, QCforeground,
+ val, frame);
+ fg_set = 1;
+ }
+ redraw = 1;
+ if (termscript)
+ fprintf (termscript, "<FGCOLOR %lu>\n", new_color);
+ }
+ }
+ else if (EQ (prop, Qbackground_color))
+ {
+ unsigned long new_color = load_color (f, NULL, val, need_to_reverse
+ ? LFACE_FOREGROUND_INDEX
+ : LFACE_BACKGROUND_INDEX);
+ if (new_color != FACE_TTY_DEFAULT_COLOR
+ && new_color != FACE_TTY_DEFAULT_FG_COLOR
+ && new_color != FACE_TTY_DEFAULT_BG_COLOR)
+ {
+ FRAME_BACKGROUND_PIXEL (f) = new_color;
+ /* Make sure the background of the default face for this
+ frame is changed as well. */
+ XSETFRAME (frame, f);
+ if (need_to_reverse)
+ {
+ Finternal_set_lisp_face_attribute (Qdefault, QCforeground,
+ val, frame);
+ prop = Qforeground_color;
+ fg_set = 1;
+ }
+ else
+ {
+ Finternal_set_lisp_face_attribute (Qdefault, QCbackground,
+ val, frame);
+ bg_set = 1;
+ }
+ redraw = 1;
+ if (termscript)
+ fprintf (termscript, "<BGCOLOR %lu>\n", new_color);
+ }
+ }
+ else if (EQ (prop, Qtitle))
+ {
+ x_set_title (f, val);
+ if (termscript)
+ fprintf (termscript, "<TITLE: %s>\n", SDATA (val));
+ }
+ else if (EQ (prop, Qcursor_type))
+ {
+ IT_set_cursor_type (f, val);
+ if (termscript)
+ fprintf (termscript, "<CTYPE: %s>\n",
+ EQ (val, Qbar) || EQ (val, Qhbar)
+ || CONSP (val) && (EQ (XCAR (val), Qbar)
+ || EQ (XCAR (val), Qhbar))
+ ? "bar" : "box");
+ }
+ store_frame_param (f, prop, val);
+ }
+
+ /* If they specified "reverse", but not the colors, we need to swap
+ the current frame colors. */
+ if (need_to_reverse)
+ {
+ Lisp_Object frame;
+
+ if (!fg_set)
+ {
+ XSETFRAME (frame, f);
+ Finternal_set_lisp_face_attribute (Qdefault, QCforeground,
+ tty_color_name (f, orig_bg),
+ frame);
+ redraw = 1;
+ }
+ if (!bg_set)
+ {
+ XSETFRAME (frame, f);
+ Finternal_set_lisp_face_attribute (Qdefault, QCbackground,
+ tty_color_name (f, orig_fg),
+ frame);
+ redraw = 1;
+ }
+ }
+
+ if (redraw)
+ {
+ face_change_count++; /* forces xdisp.c to recompute basic faces */
+ if (f == SELECTED_FRAME())
+ redraw_frame (f);
+ }
+ }
+
+ extern void init_frame_faces (FRAME_PTR);
+
+ #endif /* !HAVE_X_WINDOWS */
+
+
+ /* Do we need the internal terminal? */
+
+ void
+ internal_terminal_init ()
+ {
+ char *term = getenv ("TERM"), *colors;
+ struct frame *sf = SELECTED_FRAME();
+
+ #ifdef HAVE_X_WINDOWS
+ if (!inhibit_window_system)
+ return;
+ #endif
+
+ internal_terminal
+ = (!noninteractive) && term && !strcmp (term, "internal");
+
+ if (getenv ("EMACSTEST"))
+ termscript = fopen (getenv ("EMACSTEST"), "wt");
+
+ #ifndef HAVE_X_WINDOWS
+ if (!internal_terminal || inhibit_window_system)
+ {
+ sf->output_method = output_termcap;
+ return;
+ }
+
+ Vwindow_system = intern ("pc");
+ Vwindow_system_version = make_number (1);
+ sf->output_method = output_msdos_raw;
+
+ /* If Emacs was dumped on DOS/V machine, forget the stale VRAM address. */
+ screen_old_address = 0;
+
+ /* Forget the stale screen colors as well. */
+ initial_screen_colors[0] = initial_screen_colors[1] = -1;
+
+ bzero (&the_only_x_display, sizeof the_only_x_display);
+ the_only_x_display.background_pixel = 7; /* White */
+ the_only_x_display.foreground_pixel = 0; /* Black */
+ bright_bg ();
+ colors = getenv ("EMACSCOLORS");
+ if (colors && strlen (colors) >= 2)
+ {
+ /* The colors use 4 bits each (we enable bright background). */
+ if (isdigit (colors[0]))
+ colors[0] -= '0';
+ else if (isxdigit (colors[0]))
+ colors[0] -= (isupper (colors[0]) ? 'A' : 'a') - 10;
+ if (colors[0] >= 0 && colors[0] < 16)
+ the_only_x_display.foreground_pixel = colors[0];
+ if (isdigit (colors[1]))
+ colors[1] -= '0';
+ else if (isxdigit (colors[1]))
+ colors[1] -= (isupper (colors[1]) ? 'A' : 'a') - 10;
+ if (colors[1] >= 0 && colors[1] < 16)
+ the_only_x_display.background_pixel = colors[1];
+ }
+ the_only_x_display.font = (XFontStruct *)1; /* must *not* be zero */
+ the_only_x_display.display_info.mouse_face_mouse_frame = NULL;
+ the_only_x_display.display_info.mouse_face_deferred_gc = 0;
+ the_only_x_display.display_info.mouse_face_beg_row =
+ the_only_x_display.display_info.mouse_face_beg_col = -1;
+ the_only_x_display.display_info.mouse_face_end_row =
+ the_only_x_display.display_info.mouse_face_end_col = -1;
+ the_only_x_display.display_info.mouse_face_face_id = DEFAULT_FACE_ID;
+ the_only_x_display.display_info.mouse_face_window = Qnil;
+ the_only_x_display.display_info.mouse_face_mouse_x =
+ the_only_x_display.display_info.mouse_face_mouse_y = 0;
+ the_only_x_display.display_info.mouse_face_defer = 0;
+ the_only_x_display.display_info.mouse_face_hidden = 0;
+
+ init_frame_faces (sf);
+
+ ring_bell_hook = IT_ring_bell;
+ insert_glyphs_hook = IT_insert_glyphs;
+ delete_glyphs_hook = IT_delete_glyphs;
+ write_glyphs_hook = IT_write_glyphs;
+ cursor_to_hook = raw_cursor_to_hook = IT_cursor_to;
+ clear_to_end_hook = IT_clear_to_end;
+ clear_end_of_line_hook = IT_clear_end_of_line;
+ clear_frame_hook = IT_clear_screen;
+ update_begin_hook = IT_update_begin;
+ update_end_hook = IT_update_end;
+ frame_up_to_date_hook = IT_frame_up_to_date;
+
+ /* These hooks are called by term.c without being checked. */
+ set_terminal_modes_hook = IT_set_terminal_modes;
+ reset_terminal_modes_hook = IT_reset_terminal_modes;
+ set_terminal_window_hook = IT_set_terminal_window;
+ char_ins_del_ok = 0;
+ #endif
+ }
+
+ dos_get_saved_screen (screen, rows, cols)
+ char **screen;
+ int *rows;
+ int *cols;
+ {
+ #ifndef HAVE_X_WINDOWS
+ *screen = startup_screen_buffer;
+ *cols = startup_screen_size_X;
+ *rows = startup_screen_size_Y;
+ return *screen != (char *)0;
+ #else
+ return 0;
+ #endif
+ }
+
+ #ifndef HAVE_X_WINDOWS
+
+ /* We are not X, but we can emulate it well enough for our needs... */
+ void
+ check_x (void)
+ {
+ if (! FRAME_MSDOS_P (SELECTED_FRAME()))
+ error ("Not running under a window system");
+ }
+
+ #endif
+
+
+ /* ----------------------- Keyboard control ----------------------
+ *
+ * Keymaps reflect the following keyboard layout:
+ *
+ * 0 1 2 3 4 5 6 7 8 9 10 11 12 BS
+ * TAB 15 16 17 18 19 20 21 22 23 24 25 26 (41)
+ * CLOK 30 31 32 33 34 35 36 37 38 39 40 (41) RET
+ * SH () 45 46 47 48 49 50 51 52 53 54 SHIFT
+ * SPACE
+ */
+
+ #define Ignore 0x0000
+ #define Normal 0x0000 /* normal key - alt changes scan-code */
+ #define FctKey 0x1000 /* func key if c == 0, else c */
+ #define Special 0x2000 /* func key even if c != 0 */
+ #define ModFct 0x3000 /* special if mod-keys, else 'c' */
+ #define Map 0x4000 /* alt scan-code, map to unshift/shift key */
+ #define KeyPad 0x5000 /* map to insert/kp-0 depending on c == 0xe0 */
+ #define Grey 0x6000 /* Grey keypad key */
+
+ #define Alt 0x0100 /* alt scan-code */
+ #define Ctrl 0x0200 /* ctrl scan-code */
+ #define Shift 0x0400 /* shift scan-code */
+
+ static int extended_kbd; /* 101 (102) keyboard present. */
+
+ struct kbd_translate {
+ unsigned char sc;
+ unsigned char ch;
+ unsigned short code;
+ };
+
+ struct dos_keyboard_map
+ {
+ char *unshifted;
+ char *shifted;
+ char *alt_gr;
+ struct kbd_translate *translate_table;
+ };
+
+
+ static struct dos_keyboard_map us_keyboard = {
+ /* 0 1 2 3 4 5 */
+ /* 01234567890123456789012345678901234567890 12345678901234 */
+ "`1234567890-= qwertyuiop[] asdfghjkl;'\\ zxcvbnm,./ ",
+ /* 0123456789012345678901234567890123456789 012345678901234 */
+ "address@hidden&*()_+ QWERTYUIOP{} ASDFGHJKL:\"| ZXCVBNM<>? ",
+ 0, /* no Alt-Gr key */
+ 0 /* no translate table */
+ };
+
+ static struct dos_keyboard_map fr_keyboard = {
+ /* 0 1 2 3 4 5 */
+ /* 012 3456789012345678901234567890123456789012345678901234 */
+ "ý&\",(-_
)= azertyuiop^$ qsdfghjklm* wxcvbnm;:! ",
+ /* 0123456789012345678901234567890123456789012345678901234 */
+ " 1234567890ø+ AZERTYUIOPù QSDFGHJKLM%æ WXCVBN?./õ ",
+ /* 01234567 89012345678901234567890123456789012345678901234 */
+ " ~#{[|address@hidden Ï ",
+ 0 /* no translate table */
+ };
+
+ /*
+ * Italian keyboard support, country code 39.
+ * '<' 56:3c*0000
+ * '>' 56:3e*0000
+ * added also {,},` as, respectively, AltGr-8, AltGr-9, AltGr-'
+ * Donated by Stefano Brozzi <address@hidden>
+ */
+
+ static struct kbd_translate it_kbd_translate_table[] = {
+ { 0x56, 0x3c, Normal | 13 },
+ { 0x56, 0x3e, Normal | 27 },
+ { 0, 0, 0 }
+ };
+ static struct dos_keyboard_map it_keyboard = {
+ /* 0 1 2 3 4 5 */
+ /* 0 123456789012345678901234567890123456789012345678901234 */
+ "\\1234567890'< qwertyuiop+> asdfghjkl
zxcvbnm,.- ",
+ /* 01 23456789012345678901234567890123456789012345678901234 */
+ "|!\"$%&/()=?^> QWERTYUIOP* ASDFGHJKLøõ ZXCVBNM;:_ ",
+ /* 0123456789012345678901234567890123456789012345678901234 */
+ " {}~` [] @# ",
+ it_kbd_translate_table
+ };
+
+ static struct dos_keyboard_map dk_keyboard = {
+ /* 0 1 2 3 4 5 */
+ /* 0123456789012345678901234567890123456789012345678901234 */
+ "«1234567890+| qwertyuiop~ asdfghjkl' zxcvbnm,.- ",
+ /* 01 23456789012345678901234567890123456789012345678901234 */
+ "õ!\"#$%&/()=?` QWERTYUIOP^ ASDFGHJKL* ZXCVBNM;:_ ",
+ /* 0123456789012345678901234567890123456789012345678901234 */
+ " @$ {[]} | ",
+ 0 /* no translate table */
+ };
+
+ static struct kbd_translate jp_kbd_translate_table[] = {
+ { 0x73, 0x5c, Normal | 0 },
+ { 0x73, 0x5f, Normal | 0 },
+ { 0x73, 0x1c, Map | 0 },
+ { 0x7d, 0x5c, Normal | 13 },
+ { 0x7d, 0x7c, Normal | 13 },
+ { 0x7d, 0x1c, Map | 13 },
+ { 0, 0, 0 }
+ };
+ static struct dos_keyboard_map jp_keyboard = {
+ /* 0 1 2 3 4 5 */
+ /* 0123456789012 345678901234567890123456789012345678901234 */
+ "\\1234567890-^\\ address@hidden asdfghjkl;:] zxcvbnm,./ ",
+ /* 01 23456789012345678901234567890123456789012345678901234 */
+ "_!\"#$%&'()~=~| QWERTYUIOP`{ ASDFGHJKL+*} ZXCVBNM<>? ",
+ 0, /* no Alt-Gr key */
+ jp_kbd_translate_table
+ };
+
+ static struct keyboard_layout_list
+ {
+ int country_code;
+ struct dos_keyboard_map *keyboard_map;
+ } keyboard_layout_list[] =
+ {
+ 1, &us_keyboard,
+ 33, &fr_keyboard,
+ 39, &it_keyboard,
+ 45, &dk_keyboard,
+ 81, &jp_keyboard
+ };
+
+ static struct dos_keyboard_map *keyboard;
+ static int keyboard_map_all;
+ static int international_keyboard;
+
+ int
+ dos_set_keyboard (code, always)
+ int code;
+ int always;
+ {
+ int i;
+ _go32_dpmi_registers regs;
+
+ /* See if Keyb.Com is installed (for international keyboard support).
+ Note: calling Int 2Fh via int86 wedges the DOS box on some versions
+ of Windows 9X! So don't do that! */
+ regs.x.ax = 0xad80;
+ regs.x.ss = regs.x.sp = regs.x.flags = 0;
+ _go32_dpmi_simulate_int (0x2f, ®s);
+ if (regs.h.al == 0xff)
+ international_keyboard = 1;
+
+ /* Initialize to US settings, for countries that don't have their own. */
+ keyboard = keyboard_layout_list[0].keyboard_map;
+ keyboard_map_all = always;
+ dos_keyboard_layout = 1;
+
+ for (i = 0; i < (sizeof (keyboard_layout_list)/sizeof (struct
keyboard_layout_list)); i++)
+ if (code == keyboard_layout_list[i].country_code)
+ {
+ keyboard = keyboard_layout_list[i].keyboard_map;
+ keyboard_map_all = always;
+ dos_keyboard_layout = code;
+ return 1;
+ }
+ return 0;
+ }
+
+ static struct
+ {
+ unsigned char char_code; /* normal code */
+ unsigned char meta_code; /* M- code */
+ unsigned char keypad_code; /* keypad code */
+ unsigned char editkey_code; /* edit key */
+ } keypad_translate_map[] = {
+ '0', '0', 0xb0, /* kp-0 */ 0x63, /* insert */
+ '1', '1', 0xb1, /* kp-1 */ 0x57, /* end */
+ '2', '2', 0xb2, /* kp-2 */ 0x54, /* down */
+ '3', '3', 0xb3, /* kp-3 */ 0x56, /* next */
+ '4', '4', 0xb4, /* kp-4 */ 0x51, /* left */
+ '5', '5', 0xb5, /* kp-5 */ 0xb5, /* kp-5 */
+ '6', '6', 0xb6, /* kp-6 */ 0x53, /* right */
+ '7', '7', 0xb7, /* kp-7 */ 0x50, /* home */
+ '8', '8', 0xb8, /* kp-8 */ 0x52, /* up */
+ '9', '9', 0xb9, /* kp-9 */ 0x55, /* prior */
+ '.', '-', 0xae, /* kp-decimal */ 0xff /* delete */
+ };
+
+ static struct
+ {
+ unsigned char char_code; /* normal code */
+ unsigned char keypad_code; /* keypad code */
+ } grey_key_translate_map[] = {
+ '/', 0xaf, /* kp-decimal */
+ '*', 0xaa, /* kp-multiply */
+ '-', 0xad, /* kp-subtract */
+ '+', 0xab, /* kp-add */
+ '\r', 0x8d /* kp-enter */
+ };
+
+ static unsigned short
+ ibmpc_translate_map[] =
+ {
+ /* --------------- 00 to 0f --------------- */
+ Normal | 0xff, /* Ctrl Break + Alt-NNN */
+ Alt | ModFct | 0x1b, /* Escape */
+ Normal | 1, /* '1' */
+ Normal | 2, /* '2' */
+ Normal | 3, /* '3' */
+ Normal | 4, /* '4' */
+ Normal | 5, /* '5' */
+ Normal | 6, /* '6' */
+ Normal | 7, /* '7' */
+ Normal | 8, /* '8' */
+ Normal | 9, /* '9' */
+ Normal | 10, /* '0' */
+ Normal | 11, /* '-' */
+ Normal | 12, /* '=' */
+ Special | 0x08, /* Backspace */
+ ModFct | 0x74, /* Tab/Backtab */
+
+ /* --------------- 10 to 1f --------------- */
+ Map | 15, /* 'q' */
+ Map | 16, /* 'w' */
+ Map | 17, /* 'e' */
+ Map | 18, /* 'r' */
+ Map | 19, /* 't' */
+ Map | 20, /* 'y' */
+ Map | 21, /* 'u' */
+ Map | 22, /* 'i' */
+ Map | 23, /* 'o' */
+ Map | 24, /* 'p' */
+ Map | 25, /* '[' */
+ Map | 26, /* ']' */
+ ModFct | 0x0d, /* Return */
+ Ignore, /* Ctrl */
+ Map | 30, /* 'a' */
+ Map | 31, /* 's' */
+
+ /* --------------- 20 to 2f --------------- */
+ Map | 32, /* 'd' */
+ Map | 33, /* 'f' */
+ Map | 34, /* 'g' */
+ Map | 35, /* 'h' */
+ Map | 36, /* 'j' */
+ Map | 37, /* 'k' */
+ Map | 38, /* 'l' */
+ Map | 39, /* ';' */
+ Map | 40, /* '\'' */
+ Map | 0, /* '`' */
+ Ignore, /* Left shift */
+ Map | 41, /* '\\' */
+ Map | 45, /* 'z' */
+ Map | 46, /* 'x' */
+ Map | 47, /* 'c' */
+ Map | 48, /* 'v' */
+
+ /* --------------- 30 to 3f --------------- */
+ Map | 49, /* 'b' */
+ Map | 50, /* 'n' */
+ Map | 51, /* 'm' */
+ Map | 52, /* ',' */
+ Map | 53, /* '.' */
+ Map | 54, /* '/' */
+ Ignore, /* Right shift */
+ Grey | 1, /* Grey * */
+ Ignore, /* Alt */
+ Normal | 55, /* ' ' */
+ Ignore, /* Caps Lock */
+ FctKey | 0xbe, /* F1 */
+ FctKey | 0xbf, /* F2 */
+ FctKey | 0xc0, /* F3 */
+ FctKey | 0xc1, /* F4 */
+ FctKey | 0xc2, /* F5 */
+
+ /* --------------- 40 to 4f --------------- */
+ FctKey | 0xc3, /* F6 */
+ FctKey | 0xc4, /* F7 */
+ FctKey | 0xc5, /* F8 */
+ FctKey | 0xc6, /* F9 */
+ FctKey | 0xc7, /* F10 */
+ Ignore, /* Num Lock */
+ Ignore, /* Scroll Lock */
+ KeyPad | 7, /* Home */
+ KeyPad | 8, /* Up */
+ KeyPad | 9, /* Page Up */
+ Grey | 2, /* Grey - */
+ KeyPad | 4, /* Left */
+ KeyPad | 5, /* Keypad 5 */
+ KeyPad | 6, /* Right */
+ Grey | 3, /* Grey + */
+ KeyPad | 1, /* End */
+
+ /* --------------- 50 to 5f --------------- */
+ KeyPad | 2, /* Down */
+ KeyPad | 3, /* Page Down */
+ KeyPad | 0, /* Insert */
+ KeyPad | 10, /* Delete */
+ Shift | FctKey | 0xbe, /* (Shift) F1 */
+ Shift | FctKey | 0xbf, /* (Shift) F2 */
+ Shift | FctKey | 0xc0, /* (Shift) F3 */
+ Shift | FctKey | 0xc1, /* (Shift) F4 */
+ Shift | FctKey | 0xc2, /* (Shift) F5 */
+ Shift | FctKey | 0xc3, /* (Shift) F6 */
+ Shift | FctKey | 0xc4, /* (Shift) F7 */
+ Shift | FctKey | 0xc5, /* (Shift) F8 */
+ Shift | FctKey | 0xc6, /* (Shift) F9 */
+ Shift | FctKey | 0xc7, /* (Shift) F10 */
+ Ctrl | FctKey | 0xbe, /* (Ctrl) F1 */
+ Ctrl | FctKey | 0xbf, /* (Ctrl) F2 */
+
+ /* --------------- 60 to 6f --------------- */
+ Ctrl | FctKey | 0xc0, /* (Ctrl) F3 */
+ Ctrl | FctKey | 0xc1, /* (Ctrl) F4 */
+ Ctrl | FctKey | 0xc2, /* (Ctrl) F5 */
+ Ctrl | FctKey | 0xc3, /* (Ctrl) F6 */
+ Ctrl | FctKey | 0xc4, /* (Ctrl) F7 */
+ Ctrl | FctKey | 0xc5, /* (Ctrl) F8 */
+ Ctrl | FctKey | 0xc6, /* (Ctrl) F9 */
+ Ctrl | FctKey | 0xc7, /* (Ctrl) F10 */
+ Alt | FctKey | 0xbe, /* (Alt) F1 */
+ Alt | FctKey | 0xbf, /* (Alt) F2 */
+ Alt | FctKey | 0xc0, /* (Alt) F3 */
+ Alt | FctKey | 0xc1, /* (Alt) F4 */
+ Alt | FctKey | 0xc2, /* (Alt) F5 */
+ Alt | FctKey | 0xc3, /* (Alt) F6 */
+ Alt | FctKey | 0xc4, /* (Alt) F7 */
+ Alt | FctKey | 0xc5, /* (Alt) F8 */
+
+ /* --------------- 70 to 7f --------------- */
+ Alt | FctKey | 0xc6, /* (Alt) F9 */
+ Alt | FctKey | 0xc7, /* (Alt) F10 */
+ Ctrl | FctKey | 0x6d, /* (Ctrl) Sys Rq */
+ Ctrl | KeyPad | 4, /* (Ctrl) Left */
+ Ctrl | KeyPad | 6, /* (Ctrl) Right */
+ Ctrl | KeyPad | 1, /* (Ctrl) End */
+ Ctrl | KeyPad | 3, /* (Ctrl) Page Down */
+ Ctrl | KeyPad | 7, /* (Ctrl) Home */
+ Alt | Map | 1, /* '1' */
+ Alt | Map | 2, /* '2' */
+ Alt | Map | 3, /* '3' */
+ Alt | Map | 4, /* '4' */
+ Alt | Map | 5, /* '5' */
+ Alt | Map | 6, /* '6' */
+ Alt | Map | 7, /* '7' */
+ Alt | Map | 8, /* '8' */
+
+ /* --------------- 80 to 8f --------------- */
+ Alt | Map | 9, /* '9' */
+ Alt | Map | 10, /* '0' */
+ Alt | Map | 11, /* '-' */
+ Alt | Map | 12, /* '=' */
+ Ctrl | KeyPad | 9, /* (Ctrl) Page Up */
+ FctKey | 0xc8, /* F11 */
+ FctKey | 0xc9, /* F12 */
+ Shift | FctKey | 0xc8, /* (Shift) F11 */
+ Shift | FctKey | 0xc9, /* (Shift) F12 */
+ Ctrl | FctKey | 0xc8, /* (Ctrl) F11 */
+ Ctrl | FctKey | 0xc9, /* (Ctrl) F12 */
+ Alt | FctKey | 0xc8, /* (Alt) F11 */
+ Alt | FctKey | 0xc9, /* (Alt) F12 */
+ Ctrl | KeyPad | 8, /* (Ctrl) Up */
+ Ctrl | Grey | 2, /* (Ctrl) Grey - */
+ Ctrl | KeyPad | 5, /* (Ctrl) Keypad 5 */
+
+ /* --------------- 90 to 9f --------------- */
+ Ctrl | Grey | 3, /* (Ctrl) Grey + */
+ Ctrl | KeyPad | 2, /* (Ctrl) Down */
+ Ctrl | KeyPad | 0, /* (Ctrl) Insert */
+ Ctrl | KeyPad | 10, /* (Ctrl) Delete */
+ Ctrl | FctKey | 0x09, /* (Ctrl) Tab */
+ Ctrl | Grey | 0, /* (Ctrl) Grey / */
+ Ctrl | Grey | 1, /* (Ctrl) Grey * */
+ Alt | FctKey | 0x50, /* (Alt) Home */
+ Alt | FctKey | 0x52, /* (Alt) Up */
+ Alt | FctKey | 0x55, /* (Alt) Page Up */
+ Ignore, /* NO KEY */
+ Alt | FctKey | 0x51, /* (Alt) Left */
+ Ignore, /* NO KEY */
+ Alt | FctKey | 0x53, /* (Alt) Right */
+ Ignore, /* NO KEY */
+ Alt | FctKey | 0x57, /* (Alt) End */
+
+ /* --------------- a0 to af --------------- */
+ Alt | KeyPad | 2, /* (Alt) Down */
+ Alt | KeyPad | 3, /* (Alt) Page Down */
+ Alt | KeyPad | 0, /* (Alt) Insert */
+ Alt | KeyPad | 10, /* (Alt) Delete */
+ Alt | Grey | 0, /* (Alt) Grey / */
+ Alt | FctKey | 0x09, /* (Alt) Tab */
+ Alt | Grey | 4 /* (Alt) Keypad Enter */
+ };
+
+ /* These bit-positions corresponds to values returned by BIOS */
+ #define SHIFT_P 0x0003 /* two bits! */
+ #define CTRL_P 0x0004
+ #define ALT_P 0x0008
+ #define SCRLOCK_P 0x0010
+ #define NUMLOCK_P 0x0020
+ #define CAPSLOCK_P 0x0040
+ #define ALT_GR_P 0x0800
+ #define SUPER_P 0x4000 /* pseudo */
+ #define HYPER_P 0x8000 /* pseudo */
+
+ static int
+ dos_get_modifiers (keymask)
+ int *keymask;
+ {
+ union REGS regs;
+ int mask, modifiers = 0;
+
+ /* Calculate modifier bits */
+ regs.h.ah = extended_kbd ? 0x12 : 0x02;
+ int86 (0x16, ®s, ®s);
+
+ if (!extended_kbd)
+ {
+ mask = regs.h.al & (SHIFT_P | CTRL_P | ALT_P |
+ SCRLOCK_P | NUMLOCK_P | CAPSLOCK_P);
+ }
+ else
+ {
+ mask = regs.h.al & (SHIFT_P |
+ SCRLOCK_P | NUMLOCK_P | CAPSLOCK_P);
+
+ /* Do not break international keyboard support. */
+ /* When Keyb.Com is loaded, the right Alt key is */
+ /* used for accessing characters like { and } */
+ if (regs.h.ah & 2) /* Left ALT pressed ? */
+ mask |= ALT_P;
+
+ if ((regs.h.ah & 8) != 0) /* Right ALT pressed ? */
+ {
+ mask |= ALT_GR_P;
+ if (dos_hyper_key == 1)
+ {
+ mask |= HYPER_P;
+ modifiers |= hyper_modifier;
+ }
+ else if (dos_super_key == 1)
+ {
+ mask |= SUPER_P;
+ modifiers |= super_modifier;
+ }
+ else if (!international_keyboard)
+ {
+ /* If Keyb.Com is NOT installed, let Right Alt behave
+ like the Left Alt. */
+ mask &= ~ALT_GR_P;
+ mask |= ALT_P;
+ }
+ }
+
+ if (regs.h.ah & 1) /* Left CTRL pressed ? */
+ mask |= CTRL_P;
+
+ if (regs.h.ah & 4) /* Right CTRL pressed ? */
+ {
+ if (dos_hyper_key == 2)
+ {
+ mask |= HYPER_P;
+ modifiers |= hyper_modifier;
+ }
+ else if (dos_super_key == 2)
+ {
+ mask |= SUPER_P;
+ modifiers |= super_modifier;
+ }
+ else
+ mask |= CTRL_P;
+ }
+ }
+
+ if (mask & SHIFT_P)
+ modifiers |= shift_modifier;
+ if (mask & CTRL_P)
+ modifiers |= ctrl_modifier;
+ if (mask & ALT_P)
+ modifiers |= meta_modifier;
+
+ if (keymask)
+ *keymask = mask;
+ return modifiers;
+ }
+
+ #define NUM_RECENT_DOSKEYS (100)
+ int recent_doskeys_index; /* Index for storing next element into
recent_doskeys */
+ int total_doskeys; /* Total number of elements stored into
recent_doskeys */
+ Lisp_Object recent_doskeys; /* A vector, holding the last 100 keystrokes */
+
+ DEFUN ("recent-doskeys", Frecent_doskeys, Srecent_doskeys, 0, 0, 0,
+ doc: /* Return vector of last 100 keyboard input values seen in
dos_rawgetc.
+ Each input key receives two values in this vector: first the ASCII code,
+ and then the scan code. */)
+ ()
+ {
+ Lisp_Object val, *keys = XVECTOR (recent_doskeys)->contents;
+
+ if (total_doskeys < NUM_RECENT_DOSKEYS)
+ return Fvector (total_doskeys, keys);
+ else
+ {
+ val = Fvector (NUM_RECENT_DOSKEYS, keys);
+ bcopy (keys + recent_doskeys_index,
+ XVECTOR (val)->contents,
+ (NUM_RECENT_DOSKEYS - recent_doskeys_index) * sizeof
(Lisp_Object));
+ bcopy (keys,
+ XVECTOR (val)->contents + NUM_RECENT_DOSKEYS -
recent_doskeys_index,
+ recent_doskeys_index * sizeof (Lisp_Object));
+ return val;
+ }
+ }
+
+ /* Get a char from keyboard. Function keys are put into the event queue. */
+ static int
+ dos_rawgetc ()
+ {
+ struct input_event event;
+ union REGS regs;
+ struct display_info *dpyinfo = FRAME_X_DISPLAY_INFO (SELECTED_FRAME());
+ EVENT_INIT (event);
+
+ #ifndef HAVE_X_WINDOWS
+ /* Maybe put the cursor where it should be. */
+ IT_cmgoto (SELECTED_FRAME());
+ #endif
+
+ /* The following condition is equivalent to `kbhit ()', except that
+ it uses the bios to do its job. This pleases DESQview/X. */
+ while ((regs.h.ah = extended_kbd ? 0x11 : 0x01),
+ int86 (0x16, ®s, ®s),
+ (regs.x.flags & 0x40) == 0)
+ {
+ union REGS regs;
+ register unsigned char c;
+ int modifiers, sc, code = -1, mask, kp_mode;
+
+ regs.h.ah = extended_kbd ? 0x10 : 0x00;
+ int86 (0x16, ®s, ®s);
+ c = regs.h.al;
+ sc = regs.h.ah;
+
+ total_doskeys += 2;
+ XVECTOR (recent_doskeys)->contents[recent_doskeys_index++]
+ = make_number (c);
+ if (recent_doskeys_index == NUM_RECENT_DOSKEYS)
+ recent_doskeys_index = 0;
+ XVECTOR (recent_doskeys)->contents[recent_doskeys_index++]
+ = make_number (sc);
+ if (recent_doskeys_index == NUM_RECENT_DOSKEYS)
+ recent_doskeys_index = 0;
+
+ modifiers = dos_get_modifiers (&mask);
+
+ #ifndef HAVE_X_WINDOWS
+ if (!NILP (Vdos_display_scancodes))
+ {
+ char buf[11];
+ sprintf (buf, "%02x:%02x*%04x",
+ (unsigned) (sc&0xff), (unsigned) c, mask);
+ dos_direct_output (screen_size_Y - 2, screen_size_X - 12, buf, 10);
+ }
+ #endif
+
+ if (sc == 0xe0)
+ {
+ switch (c)
+ {
+ case 10: /* Ctrl Grey Enter */
+ code = Ctrl | Grey | 4;
+ break;
+ case 13: /* Grey Enter */
+ code = Grey | 4;
+ break;
+ case '/': /* Grey / */
+ code = Grey | 0;
+ break;
+ default:
+ continue;
+ };
+ c = 0;
+ }
+ else
+ {
+ /* Try the keyboard-private translation table first. */
+ if (keyboard->translate_table)
+ {
+ struct kbd_translate *p = keyboard->translate_table;
+
+ while (p->sc)
+ {
+ if (p->sc == sc && p->ch == c)
+ {
+ code = p->code;
+ break;
+ }
+ p++;
+ }
+ }
+ /* If the private table didn't translate it, use the general
+ one. */
+ if (code == -1)
+ {
+ if (sc >= (sizeof (ibmpc_translate_map) / sizeof (short)))
+ continue;
+ if ((code = ibmpc_translate_map[sc]) == Ignore)
+ continue;
+ }
+ }
+
+ if (c == 0)
+ {
+ /* We only look at the keyboard Ctrl/Shift/Alt keys when
+ Emacs is ready to read a key. Therefore, if they press
+ `Alt-x' when Emacs is busy, by the time we get to
+ `dos_get_modifiers', they might have already released the
+ Alt key, and Emacs gets just `x', which is BAD.
+ However, for keys with the `Map' property set, the ASCII
+ code returns zero iff Alt is pressed. So, when we DON'T
+ have to support international_keyboard, we don't have to
+ distinguish between the left and right Alt keys, and we
+ can set the META modifier for any keys with the `Map'
+ property if they return zero ASCII code (c = 0). */
+ if ( (code & Alt)
+ || ( (code & 0xf000) == Map && !international_keyboard))
+ modifiers |= meta_modifier;
+ if (code & Ctrl)
+ modifiers |= ctrl_modifier;
+ if (code & Shift)
+ modifiers |= shift_modifier;
+ }
+
+ switch (code & 0xf000)
+ {
+ case ModFct:
+ if (c && !(mask & (SHIFT_P | ALT_P | CTRL_P | HYPER_P | SUPER_P)))
+ return c;
+ c = 0; /* Special */
+
+ case FctKey:
+ if (c != 0)
+ return c;
+
+ case Special:
+ code |= 0xff00;
+ break;
+
+ case Normal:
+ if (sc == 0)
+ {
+ if (c == 0) /* ctrl-break */
+ continue;
+ return c; /* ALT-nnn */
+ }
+ if (!keyboard_map_all)
+ {
+ if (c != ' ')
+ return c;
+ code = c;
+ break;
+ }
+
+ case Map:
+ if (c && !(mask & ALT_P) && !((mask & SHIFT_P) && (mask & CTRL_P)))
+ if (!keyboard_map_all)
+ return c;
+
+ code &= 0xff;
+ if (mask & ALT_P && code <= 10 && code > 0 && dos_keypad_mode & 0x200)
+ mask |= SHIFT_P; /* ALT-1 => M-! etc. */
+
+ if (mask & SHIFT_P)
+ {
+ code = keyboard->shifted[code];
+ mask -= SHIFT_P;
+ modifiers &= ~shift_modifier;
+ }
+ else
+ if ((mask & ALT_GR_P) && keyboard->alt_gr && keyboard->alt_gr[code]
!= ' ')
+ code = keyboard->alt_gr[code];
+ else
+ code = keyboard->unshifted[code];
+ break;
+
+ case KeyPad:
+ code &= 0xff;
+ if (c == 0xe0) /* edit key */
+ kp_mode = 3;
+ else
+ if ((mask & (NUMLOCK_P|CTRL_P|SHIFT_P|ALT_P)) == NUMLOCK_P) /*
numlock on */
+ kp_mode = dos_keypad_mode & 0x03;
+ else
+ kp_mode = (dos_keypad_mode >> 4) & 0x03;
+
+ switch (kp_mode)
+ {
+ case 0:
+ if (code == 10 && dos_decimal_point)
+ return dos_decimal_point;
+ return keypad_translate_map[code].char_code;
+
+ case 1:
+ code = 0xff00 | keypad_translate_map[code].keypad_code;
+ break;
+
+ case 2:
+ code = keypad_translate_map[code].meta_code;
+ modifiers = meta_modifier;
+ break;
+
+ case 3:
+ code = 0xff00 | keypad_translate_map[code].editkey_code;
+ break;
+ }
+ break;
+
+ case Grey:
+ code &= 0xff;
+ kp_mode = ((mask & (NUMLOCK_P|CTRL_P|SHIFT_P|ALT_P)) == NUMLOCK_P) ?
0x04 : 0x40;
+ if (dos_keypad_mode & kp_mode)
+ code = 0xff00 | grey_key_translate_map[code].keypad_code;
+ else
+ code = grey_key_translate_map[code].char_code;
+ break;
+ }
+
+ make_event:
+ if (code == 0)
+ continue;
+
+ if (!dpyinfo->mouse_face_hidden && INTEGERP (Vmouse_highlight))
+ {
+ dpyinfo->mouse_face_hidden = 1;
+ clear_mouse_face (dpyinfo);
+ }
+
+ if (code >= 0x100)
+ event.kind = NON_ASCII_KEYSTROKE_EVENT;
+ else
+ event.kind = ASCII_KEYSTROKE_EVENT;
+ event.code = code;
+ event.modifiers = modifiers;
+ event.frame_or_window = selected_frame;
+ event.arg = Qnil;
+ event.timestamp = event_timestamp ();
+ kbd_buffer_store_event (&event);
+ }
+
+ if (have_mouse > 0 && !mouse_preempted)
+ {
+ int but, press, x, y, ok;
+ int mouse_prev_x = mouse_last_x, mouse_prev_y = mouse_last_y;
+ Lisp_Object mouse_window = Qnil;
+
+ /* Check for mouse movement *before* buttons. */
+ mouse_check_moved ();
+
+ /* If the mouse moved from the spot of its last sighting, we
+ might need to update mouse highlight. */
+ if (mouse_last_x != mouse_prev_x || mouse_last_y != mouse_prev_y)
+ {
+ if (dpyinfo->mouse_face_hidden)
+ {
+ dpyinfo->mouse_face_hidden = 0;
+ clear_mouse_face (dpyinfo);
+ }
+
+ /* Generate SELECT_WINDOW_EVENTs when needed. */
+ if (mouse_autoselect_window)
+ {
+ mouse_window = window_from_coordinates (SELECTED_FRAME(),
+ mouse_last_x,
+ mouse_last_y,
+ 0, 0, 0, 0);
+ /* A window will be selected only when it is not
+ selected now, and the last mouse movement event was
+ not in it. A minibuffer window will be selected iff
+ it is active. */
+ if (WINDOWP (mouse_window)
+ && !EQ (mouse_window, last_mouse_window)
+ && !EQ (mouse_window, selected_window))
+ {
+ event.kind = SELECT_WINDOW_EVENT;
+ event.frame_or_window = mouse_window;
+ event.arg = Qnil;
+ event.timestamp = event_timestamp ();
+ kbd_buffer_store_event (&event);
+ }
+ last_mouse_window = mouse_window;
+ }
+ else
+ last_mouse_window = Qnil;
+
+ previous_help_echo_string = help_echo_string;
+ help_echo_string = help_echo_object = help_echo_window = Qnil;
+ help_echo_pos = -1;
+ IT_note_mouse_highlight (SELECTED_FRAME(),
+ mouse_last_x, mouse_last_y);
+ /* If the contents of the global variable help_echo has
+ changed, generate a HELP_EVENT. */
+ if (!NILP (help_echo_string) || !NILP (previous_help_echo_string))
+ {
+ event.kind = HELP_EVENT;
+ event.frame_or_window = selected_frame;
+ event.arg = help_echo_object;
+ event.x = WINDOWP (help_echo_window)
+ ? help_echo_window : selected_frame;
+ event.y = help_echo_string;
+ event.timestamp = event_timestamp ();
+ event.code = help_echo_pos;
+ kbd_buffer_store_event (&event);
+ }
+ }
+
+ for (but = 0; but < NUM_MOUSE_BUTTONS; but++)
+ for (press = 0; press < 2; press++)
+ {
+ int button_num = but;
+
+ if (press)
+ ok = mouse_pressed (but, &x, &y);
+ else
+ ok = mouse_released (but, &x, &y);
+ if (ok)
+ {
+ /* Allow a simultaneous press/release of Mouse-1 and
+ Mouse-2 to simulate Mouse-3 on two-button mice. */
+ if (mouse_button_count == 2 && but < 2)
+ {
+ int x2, y2; /* don't clobber original coordinates */
+
+ /* If only one button is pressed, wait 100 msec and
+ check again. This way, Speedy Gonzales isn't
+ punished, while the slow get their chance. */
+ if (press && mouse_pressed (1-but, &x2, &y2)
+ || !press && mouse_released (1-but, &x2, &y2))
+ button_num = 2;
+ else
+ {
+ delay (100);
+ if (press && mouse_pressed (1-but, &x2, &y2)
+ || !press && mouse_released (1-but, &x2, &y2))
+ button_num = 2;
+ }
+ }
+
+ event.kind = MOUSE_CLICK_EVENT;
+ event.code = button_num;
+ event.modifiers = dos_get_modifiers (0)
+ | (press ? down_modifier : up_modifier);
+ event.x = x;
+ event.y = y;
+ event.frame_or_window = selected_frame;
+ event.arg = Qnil;
+ event.timestamp = event_timestamp ();
+ kbd_buffer_store_event (&event);
+ }
+ }
+ }
+
+ return -1;
+ }
+
+ static int prev_get_char = -1;
+
+ /* Return 1 if a key is ready to be read without suspending execution. */
+
+ dos_keysns ()
+ {
+ if (prev_get_char != -1)
+ return 1;
+ else
+ return ((prev_get_char = dos_rawgetc ()) != -1);
+ }
+
+ /* Read a key. Return -1 if no key is ready. */
+
+ dos_keyread ()
+ {
+ if (prev_get_char != -1)
+ {
+ int c = prev_get_char;
+ prev_get_char = -1;
+ return c;
+ }
+ else
+ return dos_rawgetc ();
+ }
+
+ #ifndef HAVE_X_WINDOWS
+
+ /* Simulation of X's menus. Nothing too fancy here -- just make it work
+ for now.
+
+ Actually, I don't know the meaning of all the parameters of the functions
+ here -- I only know how they are called by xmenu.c. I could of course
+ grab the nearest Xlib manual (down the hall, second-to-last door on the
+ left), but I don't think it's worth the effort. */
+
+ /* These hold text of the current and the previous menu help messages. */
+ static char *menu_help_message, *prev_menu_help_message;
+ /* Pane number and item number of the menu item which generated the
+ last menu help message. */
+ static int menu_help_paneno, menu_help_itemno;
+
+ static XMenu *
+ IT_menu_create ()
+ {
+ XMenu *menu;
+
+ menu = (XMenu *) xmalloc (sizeof (XMenu));
+ menu->allocated = menu->count = menu->panecount = menu->width = 0;
+ return menu;
+ }
+
+ /* Allocate some (more) memory for MENU ensuring that there is room for one
+ for item. */
+
+ static void
+ IT_menu_make_room (XMenu *menu)
+ {
+ if (menu->allocated == 0)
+ {
+ int count = menu->allocated = 10;
+ menu->text = (char **) xmalloc (count * sizeof (char *));
+ menu->submenu = (XMenu **) xmalloc (count * sizeof (XMenu *));
+ menu->panenumber = (int *) xmalloc (count * sizeof (int));
+ menu->help_text = (char **) xmalloc (count * sizeof (char *));
+ }
+ else if (menu->allocated == menu->count)
+ {
+ int count = menu->allocated = menu->allocated + 10;
+ menu->text
+ = (char **) xrealloc (menu->text, count * sizeof (char *));
+ menu->submenu
+ = (XMenu **) xrealloc (menu->submenu, count * sizeof (XMenu *));
+ menu->panenumber
+ = (int *) xrealloc (menu->panenumber, count * sizeof (int));
+ menu->help_text
+ = (char **) xrealloc (menu->help_text, count * sizeof (char *));
+ }
+ }
+
+ /* Search the given menu structure for a given pane number. */
+
+ static XMenu *
+ IT_menu_search_pane (XMenu *menu, int pane)
+ {
+ int i;
+ XMenu *try;
+
+ for (i = 0; i < menu->count; i++)
+ if (menu->submenu[i])
+ {
+ if (pane == menu->panenumber[i])
+ return menu->submenu[i];
+ if ((try = IT_menu_search_pane (menu->submenu[i], pane)))
+ return try;
+ }
+ return (XMenu *) 0;
+ }
+
+ /* Determine how much screen space a given menu needs. */
+
+ static void
+ IT_menu_calc_size (XMenu *menu, int *width, int *height)
+ {
+ int i, h2, w2, maxsubwidth, maxheight;
+
+ maxsubwidth = 0;
+ maxheight = menu->count;
+ for (i = 0; i < menu->count; i++)
+ {
+ if (menu->submenu[i])
+ {
+ IT_menu_calc_size (menu->submenu[i], &w2, &h2);
+ if (w2 > maxsubwidth) maxsubwidth = w2;
+ if (i + h2 > maxheight) maxheight = i + h2;
+ }
+ }
+ *width = menu->width + maxsubwidth;
+ *height = maxheight;
+ }
+
+ /* Display MENU at (X,Y) using FACES. */
+
+ static void
+ IT_menu_display (XMenu *menu, int y, int x, int pn, int *faces, int disp_help)
+ {
+ int i, j, face, width, mx, my, enabled, mousehere, row, col;
+ struct glyph *text, *p;
+ char *q;
+ struct frame *sf = SELECTED_FRAME();
+
+ menu_help_message = NULL;
+
+ width = menu->width;
+ text = (struct glyph *) xmalloc ((width + 2) * sizeof (struct glyph));
+ ScreenGetCursor (&row, &col);
+ mouse_get_xy (&mx, &my);
+ IT_update_begin (sf);
+ for (i = 0; i < menu->count; i++)
+ {
+ int max_width = width + 2;
+
+ IT_cursor_to (y + i, x);
+ enabled
+ = (!menu->submenu[i] && menu->panenumber[i]) || (menu->submenu[i]);
+ mousehere = (y + i == my && x <= mx && mx < x + width + 2);
+ face = faces[enabled + mousehere * 2];
+ /* The following if clause means that we display the menu help
+ strings even if the menu item is currently disabled. */
+ if (disp_help && enabled + mousehere * 2 >= 2)
+ {
+ menu_help_message = menu->help_text[i];
+ menu_help_paneno = pn - 1;
+ menu_help_itemno = i;
+ }
+ p = text;
+ SET_CHAR_GLYPH (*p, ' ', face, 0);
+ p++;
+ for (j = 0, q = menu->text[i]; *q; j++)
+ {
+ if (*q > 26)
+ {
+ SET_CHAR_GLYPH (*p, *q++, face, 0);
+ p++;
+ }
+ else /* make '^x' */
+ {
+ SET_CHAR_GLYPH (*p, '^', face, 0);
+ p++;
+ j++;
+ SET_CHAR_GLYPH (*p, *q++ + 64, face, 0);
+ p++;
+ }
+ }
+ /* Don't let the menu text overflow into the next screen row. */
+ if (x + max_width > screen_size_X)
+ {
+ max_width = screen_size_X - x;
+ text[max_width - 1].u.ch = '$'; /* indicate it's truncated */
+ }
+ for (; j < max_width - 2; j++, p++)
+ SET_CHAR_GLYPH (*p, ' ', face, 0);
+
+ SET_CHAR_GLYPH (*p, menu->submenu[i] ? 16 : ' ', face, 0);
+ p++;
+ IT_write_glyphs (text, max_width);
+ }
+ IT_update_end (sf);
+ IT_cursor_to (row, col);
+ xfree (text);
+ }
+
+ /* --------------------------- X Menu emulation ---------------------- */
+
+ /* Report availability of menus. */
+
+ int
+ have_menus_p () { return 1; }
+
+ /* Create a brand new menu structure. */
+
+ XMenu *
+ XMenuCreate (Display *foo1, Window foo2, char *foo3)
+ {
+ return IT_menu_create ();
+ }
+
+ /* Create a new pane and place it on the outer-most level. It is not
+ clear that it should be placed out there, but I don't know what else
+ to do. */
+
+ int
+ XMenuAddPane (Display *foo, XMenu *menu, char *txt, int enable)
+ {
+ int len;
+ char *p;
+
+ if (!enable)
+ abort ();
+
+ IT_menu_make_room (menu);
+ menu->submenu[menu->count] = IT_menu_create ();
+ menu->text[menu->count] = txt;
+ menu->panenumber[menu->count] = ++menu->panecount;
+ menu->help_text[menu->count] = NULL;
+ menu->count++;
+
+ /* Adjust length for possible control characters (which will
+ be written as ^x). */
+ for (len = strlen (txt), p = txt; *p; p++)
+ if (*p < 27)
+ len++;
+
+ if (len > menu->width)
+ menu->width = len;
+
+ return menu->panecount;
+ }
+
+ /* Create a new item in a menu pane. */
+
+ int
+ XMenuAddSelection (Display *bar, XMenu *menu, int pane,
+ int foo, char *txt, int enable, char *help_text)
+ {
+ int len;
+ char *p;
+
+ if (pane)
+ if (!(menu = IT_menu_search_pane (menu, pane)))
+ return XM_FAILURE;
+ IT_menu_make_room (menu);
+ menu->submenu[menu->count] = (XMenu *) 0;
+ menu->text[menu->count] = txt;
+ menu->panenumber[menu->count] = enable;
+ menu->help_text[menu->count] = help_text;
+ menu->count++;
+
+ /* Adjust length for possible control characters (which will
+ be written as ^x). */
+ for (len = strlen (txt), p = txt; *p; p++)
+ if (*p < 27)
+ len++;
+
+ if (len > menu->width)
+ menu->width = len;
+
+ return XM_SUCCESS;
+ }
+
+ /* Decide where the menu would be placed if requested at (X,Y). */
+
+ void
+ XMenuLocate (Display *foo0, XMenu *menu, int foo1, int foo2, int x, int y,
+ int *ulx, int *uly, int *width, int *height)
+ {
+ IT_menu_calc_size (menu, width, height);
+ *ulx = x + 1;
+ *uly = y;
+ *width += 2;
+ }
+
+ struct IT_menu_state
+ {
+ void *screen_behind;
+ XMenu *menu;
+ int pane;
+ int x, y;
+ };
+
+
+ /* Display menu, wait for user's response, and return that response. */
+
+ int
+ XMenuActivate (Display *foo, XMenu *menu, int *pane, int *selidx,
+ int x0, int y0, unsigned ButtonMask, char **txt,
+ void (*help_callback)(char *, int, int))
+ {
+ struct IT_menu_state *state;
+ int statecount, x, y, i, b, screensize, leave, result, onepane;
+ int title_faces[4]; /* face to display the menu title */
+ int faces[4], buffers_num_deleted = 0;
+ struct frame *sf = SELECTED_FRAME();
+ Lisp_Object saved_echo_area_message, selectface;
+
+ /* Just in case we got here without a mouse present... */
+ if (have_mouse <= 0)
+ return XM_IA_SELECT;
+ /* Don't allow non-positive x0 and y0, lest the menu will wrap
+ around the display. */
+ if (x0 <= 0)
+ x0 = 1;
+ if (y0 <= 0)
+ y0 = 1;
+
+ /* We will process all the mouse events directly, so we had
+ better prevent dos_rawgetc from stealing them from us. */
+ mouse_preempted++;
+
+ state = alloca (menu->panecount * sizeof (struct IT_menu_state));
+ screensize = screen_size * 2;
+ faces[0]
+ = lookup_derived_face (sf, intern ("msdos-menu-passive-face"),
+ DEFAULT_FACE_ID);
+ faces[1]
+ = lookup_derived_face (sf, intern ("msdos-menu-active-face"),
+ DEFAULT_FACE_ID);
+ selectface = intern ("msdos-menu-select-face");
+ faces[2] = lookup_derived_face (sf, selectface,
+ faces[0]);
+ faces[3] = lookup_derived_face (sf, selectface,
+ faces[1]);
+
+ /* Make sure the menu title is always displayed with
+ `msdos-menu-active-face', no matter where the mouse pointer is. */
+ for (i = 0; i < 4; i++)
+ title_faces[i] = faces[3];
+
+ statecount = 1;
+
+ /* Don't let the title for the "Buffers" popup menu include a
+ digit (which is ugly).
+
+ This is a terrible kludge, but I think the "Buffers" case is
+ the only one where the title includes a number, so it doesn't
+ seem to be necessary to make this more general. */
+ if (strncmp (menu->text[0], "Buffers 1", 9) == 0)
+ {
+ menu->text[0][7] = '\0';
+ buffers_num_deleted = 1;
+ }
+
+ /* We need to save the current echo area message, so that we could
+ restore it below, before we exit. See the commentary below,
+ before the call to message_with_string. */
+ saved_echo_area_message = Fcurrent_message ();
+ state[0].menu = menu;
+ mouse_off ();
+ ScreenRetrieve (state[0].screen_behind = xmalloc (screensize));
+
+ /* Turn off the cursor. Otherwise it shows through the menu
+ panes, which is ugly. */
+ IT_display_cursor (0);
+
+ /* Display the menu title. */
+ IT_menu_display (menu, y0 - 1, x0 - 1, 1, title_faces, 0);
+ if (buffers_num_deleted)
+ menu->text[0][7] = ' ';
+ if ((onepane = menu->count == 1 && menu->submenu[0]))
+ {
+ menu->width = menu->submenu[0]->width;
+ state[0].menu = menu->submenu[0];
+ }
+ else
+ {
+ state[0].menu = menu;
+ }
+ state[0].x = x0 - 1;
+ state[0].y = y0;
+ state[0].pane = onepane;
+
+ mouse_last_x = -1; /* A hack that forces display. */
+ leave = 0;
+ while (!leave)
+ {
+ if (!mouse_visible) mouse_on ();
+ mouse_check_moved ();
+ if (sf->mouse_moved)
+ {
+ sf->mouse_moved = 0;
+ result = XM_IA_SELECT;
+ mouse_get_xy (&x, &y);
+ for (i = 0; i < statecount; i++)
+ if (state[i].x <= x && x < state[i].x + state[i].menu->width + 2)
+ {
+ int dy = y - state[i].y;
+ if (0 <= dy && dy < state[i].menu->count)
+ {
+ if (!state[i].menu->submenu[dy])
+ if (state[i].menu->panenumber[dy])
+ result = XM_SUCCESS;
+ else
+ result = XM_IA_SELECT;
+ *pane = state[i].pane - 1;
+ *selidx = dy;
+ /* We hit some part of a menu, so drop extra menus that
+ have been opened. That does not include an open and
+ active submenu. */
+ if (i != statecount - 2
+ || state[i].menu->submenu[dy] != state[i+1].menu)
+ while (i != statecount - 1)
+ {
+ statecount--;
+ mouse_off ();
+ ScreenUpdate (state[statecount].screen_behind);
+ if (screen_virtual_segment)
+ dosv_refresh_virtual_screen (0, screen_size);
+ xfree (state[statecount].screen_behind);
+ }
+ if (i == statecount - 1 && state[i].menu->submenu[dy])
+ {
+ IT_menu_display (state[i].menu,
+ state[i].y,
+ state[i].x,
+ state[i].pane,
+ faces, 1);
+ state[statecount].menu = state[i].menu->submenu[dy];
+ state[statecount].pane = state[i].menu->panenumber[dy];
+ mouse_off ();
+ ScreenRetrieve (state[statecount].screen_behind
+ = xmalloc (screensize));
+ state[statecount].x
+ = state[i].x + state[i].menu->width + 2;
+ state[statecount].y = y;
+ statecount++;
+ }
+ }
+ }
+ IT_menu_display (state[statecount - 1].menu,
+ state[statecount - 1].y,
+ state[statecount - 1].x,
+ state[statecount - 1].pane,
+ faces, 1);
+ }
+ else
+ {
+ if ((menu_help_message || prev_menu_help_message)
+ && menu_help_message != prev_menu_help_message)
+ {
+ help_callback (menu_help_message,
+ menu_help_paneno, menu_help_itemno);
+ IT_display_cursor (0);
+ prev_menu_help_message = menu_help_message;
+ }
+ /* We are busy-waiting for the mouse to move, so let's be nice
+ to other Windows applications by releasing our time slice. */
+ __dpmi_yield ();
+ }
+ for (b = 0; b < mouse_button_count && !leave; b++)
+ {
+ /* Only leave if user both pressed and released the mouse, and in
+ that order. This avoids popping down the menu pane unless
+ the user is really done with it. */
+ if (mouse_pressed (b, &x, &y))
+ {
+ while (mouse_button_depressed (b, &x, &y))
+ __dpmi_yield ();
+ leave = 1;
+ }
+ (void) mouse_released (b, &x, &y);
+ }
+ }
+
+ mouse_off ();
+ ScreenUpdate (state[0].screen_behind);
+ if (screen_virtual_segment)
+ dosv_refresh_virtual_screen (0, screen_size);
+
+ /* We have a situation here. ScreenUpdate has just restored the
+ screen contents as it was before we started drawing this menu.
+ That includes any echo area message that could have been
+ displayed back then. (In reality, that echo area message will
+ almost always be the ``keystroke echo'' that echoes the sequence
+ of menu items chosen by the user.) However, if the menu had some
+ help messages, then displaying those messages caused Emacs to
+ forget about the original echo area message. So when
+ ScreenUpdate restored it, it created a discrepancy between the
+ actual screen contents and what Emacs internal data structures
+ know about it.
+
+ To avoid this conflict, we force Emacs to restore the original
+ echo area message as we found it when we entered this function.
+ The irony of this is that we then erase the restored message
+ right away, so the only purpose of restoring it is so that
+ erasing it works correctly... */
+ if (! NILP (saved_echo_area_message))
+ message_with_string ("%s", saved_echo_area_message, 0);
+ message (0);
+ while (statecount--)
+ xfree (state[statecount].screen_behind);
+ IT_display_cursor (1); /* turn cursor back on */
+ /* Clean up any mouse events that are waiting inside Emacs event queue.
+ These events are likely to be generated before the menu was even
+ displayed, probably because the user pressed and released the button
+ (which invoked the menu) too quickly. If we don't remove these events,
+ Emacs will process them after we return and surprise the user. */
+ discard_mouse_events ();
+ mouse_clear_clicks ();
+ if (!kbd_buffer_events_waiting (1))
+ clear_input_pending ();
+ /* Allow mouse events generation by dos_rawgetc. */
+ mouse_preempted--;
+ return result;
+ }
+
+ /* Dispose of a menu. */
+
+ void
+ XMenuDestroy (Display *foo, XMenu *menu)
+ {
+ int i;
+ if (menu->allocated)
+ {
+ for (i = 0; i < menu->count; i++)
+ if (menu->submenu[i])
+ XMenuDestroy (foo, menu->submenu[i]);
+ xfree (menu->text);
+ xfree (menu->submenu);
+ xfree (menu->panenumber);
+ xfree (menu->help_text);
+ }
+ xfree (menu);
+ menu_help_message = prev_menu_help_message = NULL;
+ }
+
+ int
+ x_pixel_width (struct frame *f)
+ {
+ return FRAME_COLS (f);
+ }
+
+ int
+ x_pixel_height (struct frame *f)
+ {
+ return FRAME_LINES (f);
+ }
+ #endif /* !HAVE_X_WINDOWS */
+
+ /* ----------------------- DOS / UNIX conversion --------------------- */
+
+ void msdos_downcase_filename (unsigned char *);
+
+ /* Destructively turn backslashes into slashes. */
+
+ void
+ dostounix_filename (p)
+ register char *p;
+ {
+ msdos_downcase_filename (p);
+
+ while (*p)
+ {
+ if (*p == '\\')
+ *p = '/';
+ p++;
+ }
+ }
+
+ /* Destructively turn slashes into backslashes. */
+
+ void
+ unixtodos_filename (p)
+ register char *p;
+ {
+ if (p[1] == ':' && *p >= 'A' && *p <= 'Z')
+ {
+ *p += 'a' - 'A';
+ p += 2;
+ }
+
+ while (*p)
+ {
+ if (*p == '/')
+ *p = '\\';
+ p++;
+ }
+ }
+
+ /* Get the default directory for a given drive. 0=def, 1=A, 2=B, ... */
+
+ int
+ getdefdir (drive, dst)
+ int drive;
+ char *dst;
+ {
+ char in_path[4], *p = in_path, e = errno;;
+
+ /* Generate "X:." (when drive is X) or "." (when drive is 0). */
+ if (drive != 0)
+ {
+ *p++ = drive + 'A' - 1;
+ *p++ = ':';
+ }
+
+ *p++ = '.';
+ *p = '\0';
+ errno = 0;
+ _fixpath (in_path, dst);
+ /* _fixpath can set errno to ENOSYS on non-LFN systems because
+ it queries the LFN support, so ignore that error. */
+ if ((errno && errno != ENOSYS) || *dst == '\0')
+ return 0;
+
+ msdos_downcase_filename (dst);
+
+ errno = e;
+ return 1;
+ }
+
+ char *
+ emacs_root_dir (void)
+ {
+ static char root_dir[4];
+
+ sprintf (root_dir, "%c:/", 'A' + getdisk ());
+ root_dir[0] = tolower (root_dir[0]);
+ return root_dir;
+ }
+
+ /* Remove all CR's that are followed by a LF. */
+
+ int
+ crlf_to_lf (n, buf)
+ register int n;
+ register unsigned char *buf;
+ {
+ unsigned char *np = buf, *startp = buf, *endp = buf + n;
+
+ if (n == 0)
+ return n;
+ while (buf < endp - 1)
+ {
+ if (*buf == 0x0d)
+ {
+ if (*(++buf) != 0x0a)
+ *np++ = 0x0d;
+ }
+ else
+ *np++ = *buf++;
+ }
+ if (buf < endp)
+ *np++ = *buf++;
+ return np - startp;
+ }
+
+ #if defined(__DJGPP__) && __DJGPP__ == 2 && __DJGPP_MINOR__ == 0
+
+ /* In DJGPP v2.0, library `write' can call `malloc', which might
+ cause relocation of the buffer whose address we get in ADDR.
+ Here is a version of `write' that avoids calling `malloc',
+ to serve us until such time as the library is fixed.
+ Actually, what we define here is called `__write', because
+ `write' is a stub that just jmp's to `__write' (to be
+ POSIXLY-correct with respect to the global name-space). */
+
+ #include <io.h> /* for _write */
+ #include <libc/dosio.h> /* for __file_handle_modes[] */
+
+ static char xbuf[64 * 1024]; /* DOS cannot write more in one chunk */
+
+ #define XBUF_END (xbuf + sizeof (xbuf) - 1)
+
+ int
+ __write (int handle, const void *buffer, size_t count)
+ {
+ if (count == 0)
+ return 0;
+
+ if(__file_handle_modes[handle] & O_BINARY)
+ return _write (handle, buffer, count);
+ else
+ {
+ char *xbp = xbuf;
+ const char *bp = buffer;
+ int total_written = 0;
+ int nmoved = 0, ncr = 0;
+
+ while (count)
+ {
+ /* The next test makes sure there's space for at least 2 more
+ characters in xbuf[], so both CR and LF can be put there. */
+ if (xbp < XBUF_END)
+ {
+ if (*bp == '\n')
+ {
+ ncr++;
+ *xbp++ = '\r';
+ }
+ *xbp++ = *bp++;
+ nmoved++;
+ count--;
+ }
+ if (xbp >= XBUF_END || !count)
+ {
+ size_t to_write = nmoved + ncr;
+ int written = _write (handle, xbuf, to_write);
+
+ if (written == -1)
+ return -1;
+ else
+ total_written += nmoved; /* CRs aren't counted in ret value */
+
+ /* If some, but not all were written (disk full?), return
+ an estimate of the total written bytes not counting CRs. */
+ if (written < to_write)
+ return total_written - (to_write - written) * nmoved/to_write;
+
+ nmoved = 0;
+ ncr = 0;
+ xbp = xbuf;
+ }
+ }
+ return total_written;
+ }
+ }
+
+ /* A low-level file-renaming function which works around Windows 95 bug.
+ This is pulled directly out of DJGPP v2.01 library sources, and only
+ used when you compile with DJGPP v2.0. */
+
+ #include <io.h>
+
+ int _rename(const char *old, const char *new)
+ {
+ __dpmi_regs r;
+ int olen = strlen(old) + 1;
+ int i;
+ int use_lfn = _USE_LFN;
+ char tempfile[FILENAME_MAX];
+ const char *orig = old;
+ int lfn_fd = -1;
+
+ r.x.dx = __tb_offset;
+ r.x.di = __tb_offset + olen;
+ r.x.ds = r.x.es = __tb_segment;
+
+ if (use_lfn)
+ {
+ /* Windows 95 bug: for some filenames, when you rename
+ file -> file~ (as in Emacs, to leave a backup), the
+ short 8+3 alias doesn't change, which effectively
+ makes OLD and NEW the same file. We must rename
+ through a temporary file to work around this. */
+
+ char *pbase = 0, *p;
+ static char try_char[] = "abcdefghijklmnopqrstuvwxyz012345789";
+ int idx = sizeof(try_char) - 1;
+
+ /* Generate a temporary name. Can't use `tmpnam', since $TMPDIR
+ might point to another drive, which will fail the DOS call. */
+ strcpy(tempfile, old);
+ for (p = tempfile; *p; p++) /* ensure temporary is on the same drive */
+ if (*p == '/' || *p == '\\' || *p == ':')
+ pbase = p;
+ if (pbase)
+ pbase++;
+ else
+ pbase = tempfile;
+ strcpy(pbase, "X$$djren$$.$$temp$$");
+
+ do
+ {
+ if (idx <= 0)
+ return -1;
+ *pbase = try_char[--idx];
+ } while (_chmod(tempfile, 0) != -1);
+
+ r.x.ax = 0x7156;
+ _put_path2(tempfile, olen);
+ _put_path(old);
+ __dpmi_int(0x21, &r);
+ if (r.x.flags & 1)
+ {
+ errno = __doserr_to_errno(r.x.ax);
+ return -1;
+ }
+
+ /* Now create a file with the original name. This will
+ ensure that NEW will always have a 8+3 alias
+ different from that of OLD. (Seems to be required
+ when NameNumericTail in the Registry is set to 0.) */
+ lfn_fd = _creat(old, 0);
+
+ olen = strlen(tempfile) + 1;
+ old = tempfile;
+ r.x.di = __tb_offset + olen;
+ }
+
+ for (i=0; i<2; i++)
+ {
+ if(use_lfn)
+ r.x.ax = 0x7156;
+ else
+ r.h.ah = 0x56;
+ _put_path2(new, olen);
+ _put_path(old);
+ __dpmi_int(0x21, &r);
+ if(r.x.flags & 1)
+ {
+ if (r.x.ax == 5 && i == 0) /* access denied */
+ remove(new); /* and try again */
+ else
+ {
+ errno = __doserr_to_errno(r.x.ax);
+
+ /* Restore to original name if we renamed it to temporary. */
+ if (use_lfn)
+ {
+ if (lfn_fd != -1)
+ {
+ _close (lfn_fd);
+ remove (orig);
+ }
+ _put_path2(orig, olen);
+ _put_path(tempfile);
+ r.x.ax = 0x7156;
+ __dpmi_int(0x21, &r);
+ }
+ return -1;
+ }
+ }
+ else
+ break;
+ }
+
+ /* Success. Delete the file possibly created to work
+ around the Windows 95 bug. */
+ if (lfn_fd != -1)
+ return (_close (lfn_fd) == 0) ? remove (orig) : -1;
+ return 0;
+ }
+
+ #endif /* __DJGPP__ == 2 && __DJGPP_MINOR__ == 0 */
+
+ DEFUN ("msdos-long-file-names", Fmsdos_long_file_names,
Smsdos_long_file_names,
+ 0, 0, 0,
+ doc: /* Return non-nil if long file names are supported on MSDOS. */)
+ ()
+ {
+ return (_USE_LFN ? Qt : Qnil);
+ }
+
+ /* Convert alphabetic characters in a filename to lower-case. */
+
+ void
+ msdos_downcase_filename (p)
+ register unsigned char *p;
+ {
+ /* Always lower-case drive letters a-z, even if the filesystem
+ preserves case in filenames.
+ This is so MSDOS filenames could be compared by string comparison
+ functions that are case-sensitive. Even case-preserving filesystems
+ do not distinguish case in drive letters. */
+ if (p[1] == ':' && *p >= 'A' && *p <= 'Z')
+ {
+ *p += 'a' - 'A';
+ p += 2;
+ }
+
+ /* Under LFN we expect to get pathnames in their true case. */
+ if (NILP (Fmsdos_long_file_names ()))
+ for ( ; *p; p++)
+ if (*p >= 'A' && *p <= 'Z')
+ *p += 'a' - 'A';
+ }
+
+ DEFUN ("msdos-downcase-filename", Fmsdos_downcase_filename,
Smsdos_downcase_filename,
+ 1, 1, 0,
+ doc: /* Convert alphabetic characters in FILENAME to lower case and
return that.
+ When long filenames are supported, doesn't change FILENAME.
+ If FILENAME is not a string, returns nil.
+ The argument object is never altered--the value is a copy. */)
+ (filename)
+ Lisp_Object filename;
+ {
+ Lisp_Object tem;
+
+ if (! STRINGP (filename))
+ return Qnil;
+
+ tem = Fcopy_sequence (filename);
+ msdos_downcase_filename (SDATA (tem));
+ return tem;
+ }
+
+ /* The Emacs root directory as determined by init_environment. */
+
+ static char emacsroot[MAXPATHLEN];
+
+ char *
+ rootrelativepath (rel)
+ char *rel;
+ {
+ static char result[MAXPATHLEN + 10];
+
+ strcpy (result, emacsroot);
+ strcat (result, "/");
+ strcat (result, rel);
+ return result;
+ }
+
+ /* Define a lot of environment variables if not already defined. Don't
+ remove anything unless you know what you're doing -- lots of code will
+ break if one or more of these are missing. */
+
+ void
+ init_environment (argc, argv, skip_args)
+ int argc;
+ char **argv;
+ int skip_args;
+ {
+ char *s, *t, *root;
+ int len, i;
+ static const char * const tempdirs[] = {
+ "$TMPDIR", "$TEMP", "$TMP", "c:/"
+ };
+ const int imax = sizeof (tempdirs) / sizeof (tempdirs[0]);
+
+ /* Make sure they have a usable $TMPDIR. Many Emacs functions use
+ temporary files and assume "/tmp" if $TMPDIR is unset, which
+ will break on DOS/Windows. Refuse to work if we cannot find
+ a directory, not even "c:/", usable for that purpose. */
+ for (i = 0; i < imax ; i++)
+ {
+ const char *tmp = tempdirs[i];
+
+ if (*tmp == '$')
+ tmp = getenv (tmp + 1);
+ /* Note that `access' can lie to us if the directory resides on a
+ read-only filesystem, like CD-ROM or a write-protected floppy.
+ The only way to be really sure is to actually create a file and
+ see if it succeeds. But I think that's too much to ask. */
+ if (tmp && access (tmp, D_OK) == 0)
+ {
+ setenv ("TMPDIR", tmp, 1);
+ break;
+ }
+ }
+ if (i >= imax)
+ cmd_error_internal
+ (Fcons (Qerror,
+ Fcons (build_string ("no usable temporary directories found!!"),
+ Qnil)),
+ "While setting TMPDIR: ");
+
+ /* Note the startup time, so we know not to clear the screen if we
+ exit immediately; see IT_reset_terminal_modes.
+ (Yes, I know `clock' returns zero the first time it's called, but
+ I do this anyway, in case some wiseguy changes that at some point.) */
+ startup_time = clock ();
+
+ /* Find our root from argv[0]. Assuming argv[0] is, say,
+ "c:/emacs/bin/emacs.exe" our root will be "c:/emacs". */
+ root = alloca (MAXPATHLEN + 20);
+ _fixpath (argv[0], root);
+ msdos_downcase_filename (root);
+ len = strlen (root);
+ while (len > 0 && root[len] != '/' && root[len] != ':')
+ len--;
+ root[len] = '\0';
+ if (len > 4
+ && (strcmp (root + len - 4, "/bin") == 0
+ || strcmp (root + len - 4, "/src") == 0)) /* under a debugger */
+ root[len - 4] = '\0';
+ else
+ strcpy (root, "c:/emacs"); /* let's be defensive */
+ len = strlen (root);
+ strcpy (emacsroot, root);
+
+ /* We default HOME to our root. */
+ setenv ("HOME", root, 0);
+
+ /* We default EMACSPATH to root + "/bin". */
+ strcpy (root + len, "/bin");
+ setenv ("EMACSPATH", root, 0);
+
+ /* I don't expect anybody to ever use other terminals so the internal
+ terminal is the default. */
+ setenv ("TERM", "internal", 0);
+
+ #ifdef HAVE_X_WINDOWS
+ /* Emacs expects DISPLAY to be set. */
+ setenv ("DISPLAY", "unix:0.0", 0);
+ #endif
+
+ /* SHELL is a bit tricky -- COMSPEC is the closest we come, but we must
+ downcase it and mirror the backslashes. */
+ s = getenv ("COMSPEC");
+ if (!s) s = "c:/command.com";
+ t = alloca (strlen (s) + 1);
+ strcpy (t, s);
+ dostounix_filename (t);
+ setenv ("SHELL", t, 0);
+
+ /* PATH is also downcased and backslashes mirrored. */
+ s = getenv ("PATH");
+ if (!s) s = "";
+ t = alloca (strlen (s) + 3);
+ /* Current directory is always considered part of MsDos's path but it is
+ not normally mentioned. Now it is. */
+ strcat (strcpy (t, ".;"), s);
+ dostounix_filename (t); /* Not a single file name, but this should work. */
+ setenv ("PATH", t, 1);
+
+ /* In some sense all dos users have root privileges, so... */
+ setenv ("USER", "root", 0);
+ setenv ("NAME", getenv ("USER"), 0);
+
+ /* Time zone determined from country code. To make this possible, the
+ country code may not span more than one time zone. In other words,
+ in the USA, you lose. */
+ if (!getenv ("TZ"))
+ switch (dos_country_code)
+ {
+ case 31: /* Belgium */
+ case 32: /* The Netherlands */
+ case 33: /* France */
+ case 34: /* Spain */
+ case 36: /* Hungary */
+ case 38: /* Yugoslavia (or what's left of it?) */
+ case 39: /* Italy */
+ case 41: /* Switzerland */
+ case 42: /* Tjekia */
+ case 45: /* Denmark */
+ case 46: /* Sweden */
+ case 47: /* Norway */
+ case 48: /* Poland */
+ case 49: /* Germany */
+ /* Daylight saving from last Sunday in March to last Sunday in
+ September, both at 2AM. */
+ setenv ("TZ", "MET-01METDST-02,M3.5.0/02:00,M9.5.0/02:00", 0);
+ break;
+ case 44: /* United Kingdom */
+ case 351: /* Portugal */
+ case 354: /* Iceland */
+ setenv ("TZ", "GMT+00", 0);
+ break;
+ case 81: /* Japan */
+ case 82: /* Korea */
+ setenv ("TZ", "JST-09", 0);
+ break;
+ case 90: /* Turkey */
+ case 358: /* Finland */
+ setenv ("TZ", "EET-02", 0);
+ break;
+ case 972: /* Israel */
+ /* This is an approximation. (For exact rules, use the
+ `zoneinfo/israel' file which comes with DJGPP, but you need
+ to install it in `/usr/share/zoneinfo/' directory first.) */
+ setenv ("TZ", "IST-02IDT-03,M4.1.6/00:00,M9.5.6/01:00", 0);
+ break;
+ }
+ tzset ();
+ }
+
+
+
+ static int break_stat; /* BREAK check mode status. */
+ static int stdin_stat; /* stdin IOCTL status. */
+
+ #if __DJGPP__ < 2
+
+ /* These must be global. */
+ static _go32_dpmi_seginfo ctrl_break_vector;
+ static _go32_dpmi_registers ctrl_break_regs;
+ static int ctrlbreakinstalled = 0;
+
+ /* Interrupt level detection of Ctrl-Break. Don't do anything fancy here! */
+
+ void
+ ctrl_break_func (regs)
+ _go32_dpmi_registers *regs;
+ {
+ Vquit_flag = Qt;
+ }
+
+ void
+ install_ctrl_break_check ()
+ {
+ if (!ctrlbreakinstalled)
+ {
+ /* Don't press Ctrl-Break if you don't have either DPMI or Emacs
+ was compiler with Djgpp 1.11 maintenance level 5 or later! */
+ ctrlbreakinstalled = 1;
+ ctrl_break_vector.pm_offset = (int) ctrl_break_func;
+ _go32_dpmi_allocate_real_mode_callback_iret (&ctrl_break_vector,
+ &ctrl_break_regs);
+ _go32_dpmi_set_real_mode_interrupt_vector (0x1b, &ctrl_break_vector);
+ }
+ }
+
+ #endif /* __DJGPP__ < 2 */
+
+ /* Turn off Dos' Ctrl-C checking and inhibit interpretation of
+ control chars by DOS. Determine the keyboard type. */
+
+ int
+ dos_ttraw ()
+ {
+ union REGS inregs, outregs;
+ static int first_time = 1;
+
+ break_stat = getcbrk ();
+ setcbrk (0);
+ #if __DJGPP__ < 2
+ install_ctrl_break_check ();
+ #endif
+
+ if (first_time)
+ {
+ inregs.h.ah = 0xc0;
+ int86 (0x15, &inregs, &outregs);
+ extended_kbd = (!outregs.x.cflag) && (outregs.h.ah == 0);
+
+ have_mouse = 0;
+
+ if (internal_terminal
+ #ifdef HAVE_X_WINDOWS
+ && inhibit_window_system
+ #endif
+ )
+ {
+ inregs.x.ax = 0x0021;
+ int86 (0x33, &inregs, &outregs);
+ have_mouse = (outregs.x.ax & 0xffff) == 0xffff;
+ if (!have_mouse)
+ {
+ /* Reportedly, the above doesn't work for some mouse drivers.
There
+ is an additional detection method that should work, but might
be
+ a little slower. Use that as an alternative. */
+ inregs.x.ax = 0x0000;
+ int86 (0x33, &inregs, &outregs);
+ have_mouse = (outregs.x.ax & 0xffff) == 0xffff;
+ }
+
+ if (have_mouse)
+ {
+ have_mouse = 1; /* enable mouse */
+ mouse_visible = 0;
+ mouse_setup_buttons (outregs.x.bx);
+ mouse_position_hook = &mouse_get_pos;
+ mouse_init ();
+ }
+
+ #ifndef HAVE_X_WINDOWS
+ #if __DJGPP__ >= 2
+ /* Save the cursor shape used outside Emacs. */
+ outside_cursor = _farpeekw (_dos_ds, 0x460);
+ #endif
+ #endif
+ }
+
+ first_time = 0;
+
+ #if __DJGPP__ >= 2
+
+ stdin_stat = setmode (fileno (stdin), O_BINARY);
+ return (stdin_stat != -1);
+ }
+ else
+ return (setmode (fileno (stdin), O_BINARY) != -1);
+
+ #else /* __DJGPP__ < 2 */
+
+ }
+
+ /* I think it is wrong to overwrite `stdin_stat' every time
+ but the first one this function is called, but I don't
+ want to change the way it used to work in v1.x.--EZ */
+
+ inregs.x.ax = 0x4400; /* Get IOCTL status. */
+ inregs.x.bx = 0x00; /* 0 = stdin. */
+ intdos (&inregs, &outregs);
+ stdin_stat = outregs.h.dl;
+
+ inregs.x.dx = stdin_stat | 0x0020; /* raw mode */
+ inregs.x.ax = 0x4401; /* Set IOCTL status */
+ intdos (&inregs, &outregs);
+ return !outregs.x.cflag;
+
+ #endif /* __DJGPP__ < 2 */
+ }
+
+ /* Restore status of standard input and Ctrl-C checking. */
+
+ int
+ dos_ttcooked ()
+ {
+ union REGS inregs, outregs;
+
+ setcbrk (break_stat);
+ mouse_off ();
+
+ #if __DJGPP__ >= 2
+
+ #ifndef HAVE_X_WINDOWS
+ /* Restore the cursor shape we found on startup. */
+ if (outside_cursor)
+ {
+ inregs.h.ah = 1;
+ inregs.x.cx = outside_cursor;
+ int86 (0x10, &inregs, &outregs);
+ }
+ #endif
+
+ return (setmode (fileno (stdin), stdin_stat) != -1);
+
+ #else /* not __DJGPP__ >= 2 */
+
+ inregs.x.ax = 0x4401; /* Set IOCTL status. */
+ inregs.x.bx = 0x00; /* 0 = stdin. */
+ inregs.x.dx = stdin_stat;
+ intdos (&inregs, &outregs);
+ return !outregs.x.cflag;
+
+ #endif /* not __DJGPP__ >= 2 */
+ }
+
+
+ /* Run command as specified by ARGV in directory DIR.
+ The command is run with input from TEMPIN, output to
+ file TEMPOUT and stderr to TEMPERR. */
+
+ int
+ run_msdos_command (argv, working_dir, tempin, tempout, temperr, envv)
+ unsigned char **argv;
+ const char *working_dir;
+ int tempin, tempout, temperr;
+ char **envv;
+ {
+ char *saveargv1, *saveargv2, *lowcase_argv0, *pa, *pl;
+ char oldwd[MAXPATHLEN + 1]; /* Fixed size is safe on MSDOS. */
+ int msshell, result = -1, inbak, outbak, errbak, x, y;
+ Lisp_Object cmd;
+
+ /* Get current directory as MSDOS cwd is not per-process. */
+ getwd (oldwd);
+
+ /* If argv[0] is the shell, it might come in any lettercase.
+ Since `Fmember' is case-sensitive, we need to downcase
+ argv[0], even if we are on case-preserving filesystems. */
+ lowcase_argv0 = alloca (strlen (argv[0]) + 1);
+ for (pa = argv[0], pl = lowcase_argv0; *pa; pl++)
+ {
+ *pl = *pa++;
+ if (*pl >= 'A' && *pl <= 'Z')
+ *pl += 'a' - 'A';
+ }
+ *pl = '\0';
+
+ cmd = Ffile_name_nondirectory (build_string (lowcase_argv0));
+ msshell = !NILP (Fmember (cmd, Fsymbol_value (intern ("msdos-shells"))))
+ && !strcmp ("-c", argv[1]);
+ if (msshell)
+ {
+ saveargv1 = argv[1];
+ saveargv2 = argv[2];
+ argv[1] = "/c";
+ /* We only need to mirror slashes if a DOS shell will be invoked
+ not via `system' (which does the mirroring itself). Yes, that
+ means DJGPP v1.x will lose here. */
+ if (argv[2] && argv[3])
+ {
+ char *p = alloca (strlen (argv[2]) + 1);
+
+ strcpy (argv[2] = p, saveargv2);
+ while (*p && isspace (*p))
+ p++;
+ while (*p)
+ {
+ if (*p == '/')
+ *p++ = '\\';
+ else
+ p++;
+ }
+ }
+ }
+
+ chdir (working_dir);
+ inbak = dup (0);
+ outbak = dup (1);
+ errbak = dup (2);
+ if (inbak < 0 || outbak < 0 || errbak < 0)
+ goto done; /* Allocation might fail due to lack of descriptors. */
+
+ if (have_mouse > 0)
+ mouse_get_xy (&x, &y);
+
+ dos_ttcooked (); /* do it here while 0 = stdin */
+
+ dup2 (tempin, 0);
+ dup2 (tempout, 1);
+ dup2 (temperr, 2);
+
+ #if __DJGPP__ > 1
+
+ if (msshell && !argv[3])
+ {
+ /* MS-DOS native shells are too restrictive. For starters, they
+ cannot grok commands longer than 126 characters. In DJGPP v2
+ and later, `system' is much smarter, so we'll call it instead. */
+
+ const char *cmnd;
+
+ /* A shell gets a single argument--its full command
+ line--whose original was saved in `saveargv2'. */
+
+ /* Don't let them pass empty command lines to `system', since
+ with some shells it will try to invoke an interactive shell,
+ which will hang Emacs. */
+ for (cmnd = saveargv2; *cmnd && isspace (*cmnd); cmnd++)
+ ;
+ if (*cmnd)
+ {
+ extern char **environ;
+ char **save_env = environ;
+ int save_system_flags = __system_flags;
+
+ /* Request the most powerful version of `system'. We need
+ all the help we can get to avoid calling stock DOS shells. */
+ __system_flags = (__system_redirect
+ | __system_use_shell
+ | __system_allow_multiple_cmds
+ | __system_allow_long_cmds
+ | __system_handle_null_commands
+ | __system_emulate_chdir);
+
+ environ = envv;
+ result = system (cmnd);
+ __system_flags = save_system_flags;
+ environ = save_env;
+ }
+ else
+ result = 0; /* emulate Unixy shell behavior with empty cmd line */
+ }
+ else
+
+ #endif /* __DJGPP__ > 1 */
+
+ result = spawnve (P_WAIT, argv[0], argv, envv);
+
+ dup2 (inbak, 0);
+ dup2 (outbak, 1);
+ dup2 (errbak, 2);
+ emacs_close (inbak);
+ emacs_close (outbak);
+ emacs_close (errbak);
+
+ dos_ttraw ();
+ if (have_mouse > 0)
+ {
+ mouse_init ();
+ mouse_moveto (x, y);
+ }
+
+ /* Some programs might change the meaning of the highest bit of the
+ text attribute byte, so we get blinking characters instead of the
+ bright background colors. Restore that. */
+ bright_bg ();
+
+ done:
+ chdir (oldwd);
+ if (msshell)
+ {
+ argv[1] = saveargv1;
+ argv[2] = saveargv2;
+ }
+ return result;
+ }
+
+ void
+ croak (badfunc)
+ char *badfunc;
+ {
+ fprintf (stderr, "%s not yet implemented\r\n", badfunc);
+ reset_sys_modes ();
+ exit (1);
+ }
+
+ #if __DJGPP__ < 2
+
+ /* ------------------------- Compatibility functions -------------------
+ * gethostname
+ * gettimeofday
+ */
+
+ /* Hostnames for a pc are not really funny,
+ but they are used in change log so we emulate the best we can. */
+
+ gethostname (p, size)
+ char *p;
+ int size;
+ {
+ char *q = egetenv ("HOSTNAME");
+
+ if (!q) q = "pc";
+ strcpy (p, q);
+ return 0;
+ }
+
+ /* When time zones are set from Ms-Dos too many C-libraries are playing
+ tricks with time values. We solve this by defining our own version
+ of `gettimeofday' bypassing GO32. Our version needs to be initialized
+ once and after each call to `tzset' with TZ changed. That is
+ accomplished by aliasing tzset to init_gettimeofday. */
+
+ static struct tm time_rec;
+
+ int
+ gettimeofday (struct timeval *tp, struct timezone *tzp)
+ {
+ if (tp)
+ {
+ struct time t;
+ struct tm tm;
+
+ gettime (&t);
+ if (t.ti_hour < time_rec.tm_hour) /* midnight wrap */
+ {
+ struct date d;
+ getdate (&d);
+ time_rec.tm_year = d.da_year - 1900;
+ time_rec.tm_mon = d.da_mon - 1;
+ time_rec.tm_mday = d.da_day;
+ }
+
+ time_rec.tm_hour = t.ti_hour;
+ time_rec.tm_min = t.ti_min;
+ time_rec.tm_sec = t.ti_sec;
+
+ tm = time_rec;
+ tm.tm_gmtoff = dos_timezone_offset;
+
+ tp->tv_sec = mktime (&tm); /* may modify tm */
+ tp->tv_usec = t.ti_hund * (1000000 / 100);
+ }
+ /* Ignore tzp; it's obsolescent. */
+ return 0;
+ }
+
+ #endif /* __DJGPP__ < 2 */
+
+ /*
+ * A list of unimplemented functions that we silently ignore.
+ */
+
+ #if __DJGPP__ < 2
+ unsigned alarm (s) unsigned s; {}
+ fork () { return 0; }
+ int kill (x, y) int x, y; { return -1; }
+ nice (p) int p; {}
+ void volatile pause () {}
+ sigsetmask (x) int x; { return 0; }
+ sigblock (mask) int mask; { return 0; }
+ #endif
+
+ void request_sigio (void) {}
+ setpgrp () {return 0; }
+ setpriority (x,y,z) int x,y,z; { return 0; }
+ void unrequest_sigio (void) {}
+
+ #if __DJGPP__ > 1
+ #if __DJGPP_MINOR__ < 2
+
+ #ifdef POSIX_SIGNALS
+
+ /* Augment DJGPP library POSIX signal functions. This is needed
+ as of DJGPP v2.01, but might be in the library in later releases. */
+
+ #include <libc/bss.h>
+
+ /* A counter to know when to re-initialize the static sets. */
+ static int sigprocmask_count = -1;
+
+ /* Which signals are currently blocked (initially none). */
+ static sigset_t current_mask;
+
+ /* Which signals are pending (initially none). */
+ static sigset_t pending_signals;
+
+ /* Previous handlers to restore when the blocked signals are unblocked. */
+ typedef void (*sighandler_t)(int);
+ static sighandler_t prev_handlers[320];
+
+ /* A signal handler which just records that a signal occurred
+ (it will be raised later, if and when the signal is unblocked). */
+ static void
+ sig_suspender (signo)
+ int signo;
+ {
+ sigaddset (&pending_signals, signo);
+ }
+
+ int
+ sigprocmask (how, new_set, old_set)
+ int how;
+ const sigset_t *new_set;
+ sigset_t *old_set;
+ {
+ int signo;
+ sigset_t new_mask;
+
+ /* If called for the first time, initialize. */
+ if (sigprocmask_count != __bss_count)
+ {
+ sigprocmask_count = __bss_count;
+ sigemptyset (&pending_signals);
+ sigemptyset (¤t_mask);
+ for (signo = 0; signo < 320; signo++)
+ prev_handlers[signo] = SIG_ERR;
+ }
+
+ if (old_set)
+ *old_set = current_mask;
+
+ if (new_set == 0)
+ return 0;
+
+ if (how != SIG_BLOCK && how != SIG_UNBLOCK && how != SIG_SETMASK)
+ {
+ errno = EINVAL;
+ return -1;
+ }
+
+ sigemptyset (&new_mask);
+
+ /* DJGPP supports upto 320 signals. */
+ for (signo = 0; signo < 320; signo++)
+ {
+ if (sigismember (¤t_mask, signo))
+ sigaddset (&new_mask, signo);
+ else if (sigismember (new_set, signo) && how != SIG_UNBLOCK)
+ {
+ sigaddset (&new_mask, signo);
+
+ /* SIGKILL is silently ignored, as on other platforms. */
+ if (signo != SIGKILL && prev_handlers[signo] == SIG_ERR)
+ prev_handlers[signo] = signal (signo, sig_suspender);
+ }
+ if (( how == SIG_UNBLOCK
+ && sigismember (&new_mask, signo)
+ && sigismember (new_set, signo))
+ || (how == SIG_SETMASK
+ && sigismember (&new_mask, signo)
+ && !sigismember (new_set, signo)))
+ {
+ sigdelset (&new_mask, signo);
+ if (prev_handlers[signo] != SIG_ERR)
+ {
+ signal (signo, prev_handlers[signo]);
+ prev_handlers[signo] = SIG_ERR;
+ }
+ if (sigismember (&pending_signals, signo))
+ {
+ sigdelset (&pending_signals, signo);
+ raise (signo);
+ }
+ }
+ }
+ current_mask = new_mask;
+ return 0;
+ }
+
+ #else /* not POSIX_SIGNALS */
+
+ sigsetmask (x) int x; { return 0; }
+ sigblock (mask) int mask; { return 0; }
+
+ #endif /* not POSIX_SIGNALS */
+ #endif /* not __DJGPP_MINOR__ < 2 */
+ #endif /* __DJGPP__ > 1 */
+
+ #ifndef HAVE_SELECT
+ #include "sysselect.h"
+
+ #ifndef EMACS_TIME_ZERO_OR_NEG_P
+ #define EMACS_TIME_ZERO_OR_NEG_P(time) \
+ ((long)(time).tv_sec < 0 \
+ || ((time).tv_sec == 0 \
+ && (long)(time).tv_usec <= 0))
+ #endif
+
+ /* This yields the rest of the current time slice to the task manager.
+ It should be called by any code which knows that it has nothing
+ useful to do except idle.
+
+ I don't use __dpmi_yield here, since versions of library before 2.02
+ called Int 2Fh/AX=1680h there in a way that would wedge the DOS box
+ on some versions of Windows 9X. */
+
+ void
+ dos_yield_time_slice (void)
+ {
+ _go32_dpmi_registers r;
+
+ r.x.ax = 0x1680;
+ r.x.ss = r.x.sp = r.x.flags = 0;
+ _go32_dpmi_simulate_int (0x2f, &r);
+ if (r.h.al == 0x80)
+ errno = ENOSYS;
+ }
+
+ /* Only event queue is checked. */
+ /* We don't have to call timer_check here
+ because wait_reading_process_input takes care of that. */
+ int
+ sys_select (nfds, rfds, wfds, efds, timeout)
+ int nfds;
+ SELECT_TYPE *rfds, *wfds, *efds;
+ EMACS_TIME *timeout;
+ {
+ int check_input;
+ struct time t;
+
+ check_input = 0;
+ if (rfds)
+ {
+ check_input = FD_ISSET (0, rfds);
+ FD_ZERO (rfds);
+ }
+ if (wfds)
+ FD_ZERO (wfds);
+ if (efds)
+ FD_ZERO (efds);
+
+ if (nfds != 1)
+ abort ();
+
+ /* If we are looking only for the terminal, with no timeout,
+ just read it and wait -- that's more efficient. */
+ if (!timeout)
+ {
+ while (!detect_input_pending ())
+ {
+ dos_yield_time_slice ();
+ }
+ }
+ else
+ {
+ EMACS_TIME clnow, cllast, cldiff;
+
+ gettime (&t);
+ EMACS_SET_SECS_USECS (cllast, t.ti_sec, t.ti_hund * 10000L);
+
+ while (!check_input || !detect_input_pending ())
+ {
+ gettime (&t);
+ EMACS_SET_SECS_USECS (clnow, t.ti_sec, t.ti_hund * 10000L);
+ EMACS_SUB_TIME (cldiff, clnow, cllast);
+
+ /* When seconds wrap around, we assume that no more than
+ 1 minute passed since last `gettime'. */
+ if (EMACS_TIME_NEG_P (cldiff))
+ EMACS_SET_SECS (cldiff, EMACS_SECS (cldiff) + 60);
+ EMACS_SUB_TIME (*timeout, *timeout, cldiff);
+
+ /* Stop when timeout value crosses zero. */
+ if (EMACS_TIME_ZERO_OR_NEG_P (*timeout))
+ return 0;
+ cllast = clnow;
+ dos_yield_time_slice ();
+ }
+ }
+
+ FD_SET (0, rfds);
+ return 1;
+ }
+ #endif
+
+ /*
+ * Define overlaid functions:
+ *
+ * chdir -> sys_chdir
+ * tzset -> init_gettimeofday
+ * abort -> dos_abort
+ */
+
+ #ifdef chdir
+ #undef chdir
+ extern int chdir ();
+
+ int
+ sys_chdir (path)
+ const char* path;
+ {
+ int len = strlen (path);
+ char *tmp = (char *)path;
+
+ if (*tmp && tmp[1] == ':')
+ {
+ if (getdisk () != tolower (tmp[0]) - 'a')
+ setdisk (tolower (tmp[0]) - 'a');
+ tmp += 2; /* strip drive: KFS 1995-07-06 */
+ len -= 2;
+ }
+
+ if (len > 1 && (tmp[len - 1] == '/'))
+ {
+ char *tmp1 = (char *) alloca (len + 1);
+ strcpy (tmp1, tmp);
+ tmp1[len - 1] = 0;
+ tmp = tmp1;
+ }
+ return chdir (tmp);
+ }
+ #endif
+
+ #ifdef tzset
+ #undef tzset
+ extern void tzset (void);
+
+ void
+ init_gettimeofday ()
+ {
+ time_t ltm, gtm;
+ struct tm *lstm;
+
+ tzset ();
+ ltm = gtm = time (NULL);
+ ltm = mktime (lstm = localtime (<m));
+ gtm = mktime (gmtime (>m));
+ time_rec.tm_hour = 99; /* force gettimeofday to get date */
+ time_rec.tm_isdst = lstm->tm_isdst;
+ dos_timezone_offset = time_rec.tm_gmtoff = (int)(gtm - ltm) / 60;
+ }
+ #endif
+
+ #ifdef abort
+ #undef abort
+ void
+ dos_abort (file, line)
+ char *file;
+ int line;
+ {
+ char buffer1[200], buffer2[400];
+ int i, j;
+
+ sprintf (buffer1, "<EMACS FATAL ERROR IN %s LINE %d>", file, line);
+ for (i = j = 0; buffer1[i]; i++) {
+ buffer2[j++] = buffer1[i];
+ buffer2[j++] = 0x70;
+ }
+ dosmemput (buffer2, j, (int)ScreenPrimary);
+ ScreenSetCursor (2, 0);
+ abort ();
+ }
+ #else
+ void
+ abort ()
+ {
+ dos_ttcooked ();
+ ScreenSetCursor (10, 0);
+ cputs ("\r\n\nEmacs aborted!\r\n");
+ #if __DJGPP__ > 1
+ #if __DJGPP__ == 2 && __DJGPP_MINOR__ < 2
+ if (screen_virtual_segment)
+ dosv_refresh_virtual_screen (2 * 10 * screen_size_X, 4 * screen_size_X);
+ /* Generate traceback, so we could tell whodunit. */
+ signal (SIGINT, SIG_DFL);
+ __asm__ __volatile__ ("movb $0x1b,%al;call ___djgpp_hw_exception");
+ #else /* __DJGPP_MINOR__ >= 2 */
+ raise (SIGABRT);
+ #endif /* __DJGPP_MINOR__ >= 2 */
+ #endif
+ exit (2);
+ }
+ #endif
+
+ /* The following variables are required so that cus-start.el won't
+ complain about unbound variables. */
+ #ifndef subprocesses
+ /* Nonzero means delete a process right away if it exits (process.c). */
+ static int delete_exited_processes;
+ #endif
+
+ syms_of_msdos ()
+ {
+ recent_doskeys = Fmake_vector (make_number (NUM_RECENT_DOSKEYS), Qnil);
+ staticpro (&recent_doskeys);
+
+ #ifndef HAVE_X_WINDOWS
+
+ /* The following two are from xfns.c: */
+ Qbar = intern ("bar");
+ staticpro (&Qbar);
+ Qhbar = intern ("hbar");
+ staticpro (&Qhbar);
+ Qcursor_type = intern ("cursor-type");
+ staticpro (&Qcursor_type);
+ Qreverse = intern ("reverse");
+ staticpro (&Qreverse);
+
+ DEFVAR_LISP ("dos-unsupported-char-glyph", &Vdos_unsupported_char_glyph,
+ doc: /* *Glyph to display instead of chars not supported by
current codepage.
+
+ This variable is used only by MSDOS terminals. */);
+ Vdos_unsupported_char_glyph = '\177';
+
+ #endif
+ #ifndef subprocesses
+ DEFVAR_BOOL ("delete-exited-processes", &delete_exited_processes,
+ doc: /* *Non-nil means delete processes immediately when they
exit.
+ nil means don't delete them until `list-processes' is run. */);
+ delete_exited_processes = 0;
+ #endif
+
+ defsubr (&Srecent_doskeys);
+ defsubr (&Smsdos_long_file_names);
+ defsubr (&Smsdos_downcase_filename);
+ defsubr (&Smsdos_remember_default_colors);
+ defsubr (&Smsdos_set_mouse_buttons);
+ }
+
+ #endif /* MSDOS */
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Kenichi Handa <=