/* MS-DOS specific C utilities. -*- coding: cp850 -*-
Copyright (C) 1993-1997, 1999-2023 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 3 of the License, 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. If not, see . */
/* Contributed by Morten Welinder */
/* New display, keyboard, and mouse control by Kim F. Storm */
/* Note: This file MUST use a unibyte encoding, to both display the
keys on the non-US keyboard layout as their respective labels, and
provide the correct byte values for the keyboard input to inject
into Emacs. See 'struct dos_keyboard_map' below. As long as there
are only European keyboard layouts here, we are OK with DOS
codepage 850 encoding. */
/* Note: some of the stuff here was taken from end of sysdep.c in demacs. */
#include
#ifdef MSDOS
#include
#include "lisp.h"
#include
#include
#include
#include
/* gettime and settime in dos.h clash with their namesakes from
gnulib, so we move out of our way the prototypes in dos.h. */
#define gettime dos_h_gettime_
#define settime dos_h_settime_
#include
#undef gettime
#undef settime
#include
#include /* for _fixpath */
#include /* for chdir, dup, dup2, etc. */
#include /* for getdisk */
#pragma pack(0) /* dir.h does a pack(4), which isn't GCC's default */
#undef opendir
#include /* for opendir */
#include
#include /* for setmode */
#include /* for __dpmi_xxx stuff */
#include /* for _farsetsel, _farnspokeb */
#include /* for _USE_LFN */
#include /* for cputs */
#if (__DJGPP__ + (__DJGPP_MINOR__ > 3)) >= 3
#define SYS_ENVIRON _environ
#else
#define SYS_ENVIRON environ
#endif
#include "msdos.h"
#include "systime.h"
#include "frame.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 "window.h"
#include "menu.h"
#include "buffer.h"
#include "commands.h"
#include "blockinput.h"
#include "keyboard.h"
#include "intervals.h"
#include
#include
#include
/* #include */
/* Damn that local process.h! Instead we can define P_WAIT and
spawnve ourselves. */
#define P_WAIT 1
extern int spawnve (int, const char *, char *const [], char *const []);
#ifndef _USE_LFN
#define _USE_LFN 0
#endif
#ifndef _dos_ds
#define _dos_ds _go32_info_block.selector_for_linear_memory
#endif
#include
#include "syssignal.h"
#include "careadlinkat.h"
#include "allocator.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
#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 */
/* Return the current timestamp in milliseconds since midnight. */
static unsigned long
event_timestamp (void)
{
struct timespec t;
unsigned long s;
gettime (&t);
s = t.tv_sec;
s %= 86400;
s *= 1000;
s += t.tv_nsec * 1000000;
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 (void)
{
union REGS regs;
if (have_mouse > 0 && !mouse_visible)
{
struct tty_display_info *tty = CURTTY ();
if (tty->termscript)
fprintf (tty->termscript, "");
regs.x.ax = 0x0001;
int86 (0x33, ®s, ®s);
mouse_visible = 1;
}
}
void
mouse_off (void)
{
union REGS regs;
if (have_mouse > 0 && mouse_visible)
{
struct tty_display_info *tty = CURTTY ();
if (tty->termscript)
fprintf (tty->termscript, "");
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. */)
(Lisp_Object nbuttons)
{
int n;
CHECK_FIXNUM (nbuttons);
n = XFIXNUM (nbuttons);
if (n < 2 || n > 3)
xsignal2 (Qargs_out_of_range,
build_string ("only 2 or 3 mouse buttons are supported"),
nbuttons);
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 (int x, int y)
{
union REGS regs;
struct tty_display_info *tty = CURTTY ();
if (tty->termscript)
fprintf (tty->termscript, "", 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 (int b, int *xp, int *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 (int b, int *xp, int *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 (int b, int *xp, int *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 (struct frame **f, int insist, Lisp_Object *bar_window,
enum scroll_bar_part *part, Lisp_Object *x, Lisp_Object *y,
Time *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_fixnum (mouse_last_x = ix);
*y = make_fixnum (mouse_last_y = iy);
}
static void
mouse_check_moved (void)
{
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 (void)
{
union REGS regs;
struct tty_display_info *tty = CURTTY ();
if (tty->termscript)
fprintf (tty->termscript, "");
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;
/* The only display since MS-DOS does not support multiple ones. */
struct tty_display_info the_only_display_info;
/* The only tty_output, since MS-DOS supports only 1 display. */
struct tty_output the_only_tty_output;
/* 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;
/* The screen colors of the current frame, which serve as the default
colors for newly-created frames. */
static int initial_screen_colors[2];
/* 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);
}
static void
dos_direct_output (int y, int x, char *buf, int len)
{
int t0 = 2 * (x + y * screen_size_X);
int t = t0 + (int) ScreenPrimary;
int l0 = len;
/* 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
#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 (int *rows, int *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. */
video_mode
= Fsymbol_value (Fintern_soft (make_formatted_string
(video_name, "screen-dimensions-%dx%d",
*rows, *cols), Qnil));
if (FIXNUMP (video_mode)
&& (video_mode_value = XFIXNUM (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. */
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 < ARRAYELTS (std_dimension))
{
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++;
}
}
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 the dimensions changed, the mouse highlight info is invalid. */
if (current_rows != *rows || current_cols != *cols)
{
struct frame *f = SELECTED_FRAME ();
Mouse_HLInfo *hlinfo = MOUSE_HL_INFO (f);
Lisp_Object window = hlinfo->mouse_face_window;
if (! NILP (window) && XFRAME (XWINDOW (window)->frame) == f)
reset_mouse_highlight (hlinfo);
}
/* 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 (void)
{
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)
{
unsigned desired_cursor;
__dpmi_regs regs;
int max_line, top_line, bot_line;
struct tty_display_info *tty = FRAME_TTY (f);
/* 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;
if (tty->termscript)
fprintf (tty->termscript, "\nCURSOR SHAPE=(%d,%d)", start_line, width);
/* 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);
}
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 (FIXNUMP (bar_parms))
{
/* Feature: negative WIDTH means cursor at the top
of the character cell, zero means invisible cursor. */
width = XFIXNUM (bar_parms);
msdos_set_cursor_shape (f, width >= 0 ? DEFAULT_CURSOR_START : 0,
width);
}
else if (CONSP (bar_parms)
&& FIXNUMP (XCAR (bar_parms))
&& FIXNUMP (XCDR (bar_parms)))
{
int start_line = XFIXNUM (XCDR (bar_parms));
width = XFIXNUM (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 (struct frame *f)
{
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_OR_NULL (sf, face);
struct face *dfp = FACE_FROM_ID_OR_NULL (sf, DEFAULT_FACE_ID);
unsigned long fg, bg, dflt_fg, dflt_bg;
struct tty_display_info *tty = FRAME_TTY (sf);
if (!fp)
{
fp = dfp;
/* The default face for the frame should always be realized and
cached. */
if (!fp)
emacs_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 (tty->termscript)
fprintf (tty->termscript, "", 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);
}
}
/* According to RBIL (INTERRUP.A, V-1000), 160 is the maximum possible
width of a DOS display in any known text mode. We multiply by 2 to
accommodate the screen attribute byte. */
#define MAX_SCREEN_BUF 160*2
extern unsigned char *encode_terminal_code (struct glyph *, int,
struct coding_system *);
static void
IT_write_glyphs (struct frame *f, struct glyph *str, int str_len)
{
unsigned char screen_buf[MAX_SCREEN_BUF], *screen_bp, *bp;
int offset = 2 * (new_pos_X + screen_size_X * new_pos_Y);
register int sl = str_len;
struct tty_display_info *tty = FRAME_TTY (f);
struct frame *sf;
unsigned char *conversion_buffer;
/* 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 = FRAME_TERMINAL_CODING (f);
if (!(coding->common_flags & CODING_REQUIRE_ENCODING_MASK))
coding = &safe_terminal_coding;
if (str_len <= 0) return;
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. */
coding->mode &= ~CODING_MODE_LAST_BLOCK;
screen_bp = &screen_buf[0];
while (sl > 0)
{
int cf;
int n;
/* 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 */
/* Identify a run of glyphs with the same face. */
for (n = 1; n < sl; ++n)
if (str[n].face_id != cf)
break;
if (n >= sl)
/* This is the last glyph. */
coding->mode |= CODING_MODE_LAST_BLOCK;
conversion_buffer = encode_terminal_code (str, n, coding);
if (coding->produced > 0)
{
/* Copy the encoded bytes to the screen buffer. */
for (bp = conversion_buffer; coding->produced--; bp++)
{
/* Paranoia: discard bytes that would overrun the end of
the screen buffer. */
if (screen_bp - screen_buf <= MAX_SCREEN_BUF - 2)
{
*screen_bp++ = (unsigned char)*bp;
*screen_bp++ = ScreenAttrib;
}
if (tty->termscript)
fputc (*bp, tty->termscript);
}
}
/* Update STR and its remaining length. */
str += n;
sl -= n;
}
/* Dump whatever we have 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;
}
/************************************************************************
Mouse Highlight (and friends..)
************************************************************************/
static int mouse_preempted = 0; /* non-zero when XMenu gobbles mouse events */
int
popup_activated (void)
{
return mouse_preempted;
}
/* Draw TEXT_AREA glyphs between START and END of glyph row ROW on
window W. X is relative to TEXT_AREA in W. HL is a face override
for drawing the glyphs. */
void
tty_draw_row_with_mouse_face (struct window *w, struct glyph_row *row,
int start_hpos, int end_hpos,
enum draw_glyphs_face hl)
{
struct frame *f = XFRAME (WINDOW_FRAME (w));
struct tty_display_info *tty = FRAME_TTY (f);
Mouse_HLInfo *hlinfo = &tty->mouse_highlight;
if (hl == DRAW_MOUSE_FACE)
{
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 (tty->termscript)
fprintf (tty->termscript, "\n",
kstart, kstart + nglyphs - 1, vpos);
mouse_off ();
IT_set_face (hlinfo->mouse_face_face_id);
/* Since we are going to change only the _colors_ of already
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 if (hl == DRAW_NORMAL_TEXT)
{
/* 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 (tty->termscript)
fprintf (tty->termscript, "",
new_pos_X, new_pos_X + nglyphs - 1, new_pos_Y);
IT_write_glyphs (f, row->glyphs[TEXT_AREA] + start_hpos, nglyphs);
if (tty->termscript)
fputs ("\n", tty->termscript);
new_pos_X = save_x;
new_pos_Y = save_y;
}
}
static void
IT_clear_end_of_line (struct frame *f, int first_unused)
{
char *spaces, *sp;
int i, j, offset = 2 * (new_pos_X + screen_size_X * new_pos_Y);
struct tty_display_info *tty = FRAME_TTY (f);
if (new_pos_X >= first_unused || fatal_error_in_progress)
return;
IT_set_face (0);
i = (j = first_unused - new_pos_X) * 2;
if (tty->termscript)
fprintf (tty->termscript, "", 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 (struct frame *f)
{
struct tty_display_info *tty = FRAME_TTY (f);
if (tty->termscript)
fprintf (tty->termscript, "");
/* 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_OR_NULL (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 (struct frame *f)
{
struct tty_display_info *tty = FRAME_TTY (f);
if (tty->termscript)
fprintf (tty->termscript, "");
while (new_pos_Y < screen_size_Y) {
new_pos_X = 0;
IT_clear_end_of_line (f, screen_size_X);
new_pos_Y++;
}
}
static void
IT_cursor_to (struct frame *f, int y, int x)
{
struct tty_display_info *tty = FRAME_TTY (f);
if (tty->termscript)
fprintf (tty->termscript, "\n", x, y);
new_pos_X = x;
new_pos_Y = y;
}
static int cursor_cleared;
static void
IT_display_cursor (int on)
{
struct tty_display_info *tty = CURTTY ();
if (on && cursor_cleared)
{
ScreenSetCursor (current_pos_Y, current_pos_X);
cursor_cleared = 0;
if (tty->termscript)
fprintf (tty->termscript, "\nCURSOR ON (%dx%d)",
current_pos_Y, current_pos_X);
}
else if (!on && !cursor_cleared)
{
ScreenSetCursor (-1, -1);
cursor_cleared = 1;
if (tty->termscript)
fprintf (tty->termscript, "\nCURSOR OFF (%dx%d)",
current_pos_Y, current_pos_X);
}
}
/* 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 (struct frame *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; */
struct tty_display_info *tty = FRAME_TTY (f);
/* 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 (tty->termscript)
fprintf (tty->termscript, "\n", 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 tty_display_info *display_info = FRAME_DISPLAY_INFO (f);
Mouse_HLInfo *hlinfo = &display_info->mouse_highlight;
struct frame *mouse_face_frame = hlinfo->mouse_face_mouse_frame;
if (display_info->termscript)
fprintf (display_info->termscript, "\n\nmouse_face_defer = 1;
/* If F needs to be redrawn, simply forget about any prior mouse
highlighting. */
if (FRAME_GARBAGED_P (f))
hlinfo->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 (hlinfo->mouse_face_window)
&& WINDOWP (hlinfo->mouse_face_window))
{
struct window *w = XWINDOW (hlinfo->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->contents))
hlinfo->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->contents) || i < w->desired_matrix->nrows)
clear_mouse_face (hlinfo);
}
}
else if (mouse_face_frame && !FRAME_LIVE_P (mouse_face_frame))
/* If the frame with mouse highlight was deleted, invalidate the
highlight info. */
reset_mouse_highlight (hlinfo);
unblock_input ();
}
static void
IT_update_end (struct frame *f)
{
struct tty_display_info *dpyinfo = FRAME_DISPLAY_INFO (f);
if (dpyinfo->termscript)
fprintf (dpyinfo->termscript, "\nmouse_highlight.mouse_face_defer = 0;
}
static void
IT_frame_up_to_date (struct frame *f)
{
Lisp_Object new_cursor, frame_desired_cursor;
struct window *sw;
FRAME_MOUSE_UPDATE (f);
/* 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->contents);
if (EQ (BVAR (b,cursor_type), Qt))
new_cursor = frame_desired_cursor;
else if (NILP (BVAR (b, cursor_type))) /* nil means no cursor */
new_cursor = Fcons (Qbar, make_fixnum (0));
else
new_cursor = BVAR (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 memory 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 (struct frame *f, struct glyph *start, 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 (f, start, len);
}
static void
IT_delete_glyphs (struct frame *f, int n)
{
emacs_abort ();
}
/* This was copied from xfaces.c */
/* IT_set_terminal_modes is called when emacs is started,
resumed, and whenever the screen is redrawn! */
static void
IT_set_terminal_modes (struct terminal *term)
{
struct tty_display_info *tty;
/* If called with initial terminal, it's too early to do anything
useful. */
if (term->type == output_initial)
return;
tty = term->display_info.tty;
if (tty->termscript)
fprintf (tty->termscript, "\n");
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;
/* 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;
}
}
ScreenGetCursor (&startup_pos_Y, &startup_pos_X);
ScreenRetrieve (startup_screen_buffer = xmalloc (screen_size * 2));
bright_bg ();
}
/* IT_reset_terminal_modes is called when emacs is
suspended or killed. */
static void
IT_reset_terminal_modes (struct terminal *term)
{
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;
struct tty_display_info *tty = term->display_info.tty;
if (tty->termscript)
fprintf (tty->termscript, "\n");
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 (tty->termscript)
fprintf (tty->termscript, "\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);
startup_screen_buffer = NULL;
term_setup_done = 0;
}
/* Remember the screen colors of the current 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. */)
(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. */
initial_screen_colors[0] = FRAME_FOREGROUND_PIXEL (f);
initial_screen_colors[1] = FRAME_BACKGROUND_PIXEL (f);
return Qnil;
}
void
IT_set_frame_parameters (struct frame *f, Lisp_Object alist)
{
Lisp_Object tail;
int i, j, length = XFIXNUM (Flength (alist));
Lisp_Object *parms
= (Lisp_Object *) alloca (length * word_size);
Lisp_Object *values
= (Lisp_Object *) alloca (length * word_size);
/* Do we have to reverse the foreground and background colors? */
int reverse = EQ (Fcdr (Fassq (Qreverse, f->param_alist)), Qt);
int redraw = 0, fg_set = 0, bg_set = 0;
unsigned long orig_fg, orig_bg;
struct tty_display_info *tty = FRAME_TTY (f);
/* If we are creating a new frame, begin with the original screen colors
used for the initial frame. */
if (!f->default_face_done_p
&& 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];
init_frame_faces (f);
f->default_face_done_p = 1;
}
orig_fg = reverse ? FRAME_BACKGROUND_PIXEL (f) : FRAME_FOREGROUND_PIXEL (f);
orig_bg = reverse ? FRAME_FOREGROUND_PIXEL (f) : FRAME_BACKGROUND_PIXEL (f);
/* Extract parm names and values into those vectors. */
i = 0;
for (tail = alist; CONSP (tail); tail = XCDR (tail))
{
Lisp_Object elt = XCAR (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);
}
if (tty->termscript && reverse)
fprintf (tty->termscript, "\n");
/* Now process the alist elements in reverse of specified order. */
for (i--; i >= 0; i--)
{
Lisp_Object prop, val;
prop = parms[i];
val = values[i];
if (EQ (prop, Qforeground_color))
{
unsigned long new_color = load_color (f, NULL, val, 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)
{
if (!reverse)
{
FRAME_FOREGROUND_PIXEL (f) = new_color;
/* Make sure the foreground of the default face for
this frame is changed as well. */
update_face_from_frame_parameter (f, Qforeground_color, val);
fg_set = 1;
if (tty->termscript)
fprintf (tty->termscript, "\n", new_color);
}
else
{
FRAME_BACKGROUND_PIXEL (f) = new_color;
update_face_from_frame_parameter (f, Qbackground_color, val);
bg_set = 1;
if (tty->termscript)
fprintf (tty->termscript, "\n", new_color);
}
redraw = 1;
}
}
else if (EQ (prop, Qbackground_color))
{
unsigned long new_color = load_color (f, NULL, val, 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)
{
if (!reverse)
{
FRAME_BACKGROUND_PIXEL (f) = new_color;
/* Make sure the background of the default face for
this frame is changed as well. */
bg_set = 1;
update_face_from_frame_parameter (f, Qbackground_color, val);
if (tty->termscript)
fprintf (tty->termscript, "\n", new_color);
}
else
{
FRAME_FOREGROUND_PIXEL (f) = new_color;
fg_set = 1;
update_face_from_frame_parameter (f, Qforeground_color, val);
if (tty->termscript)
fprintf (tty->termscript, "\n", new_color);
}
redraw = 1;
}
}
else if (EQ (prop, Qtitle))
{
x_set_title (f, val);
if (tty->termscript)
fprintf (tty->termscript, "\n", SDATA (val));
}
else if (EQ (prop, Qcursor_type))
{
IT_set_cursor_type (f, val);
if (tty->termscript)
fprintf (tty->termscript, "\n",
EQ (val, Qbar)
|| EQ (val, Qhbar)
|| (CONSP (val) && (EQ (XCAR (val), Qbar)
|| EQ (XCAR (val), Qhbar)))
? "bar" : "box");
}
else if (EQ (prop, Qtty_type))
{
internal_terminal_init ();
if (tty->termscript)
fprintf (tty->termscript, "\n",
SBYTES (val), SDATA (val));
}
store_frame_param (f, prop, val);
}
/* If they specified "reverse", but not the colors, we need to swap
the current frame colors. */
if (reverse)
{
if (!fg_set)
{
FRAME_FOREGROUND_PIXEL (f) = orig_bg;
update_face_from_frame_parameter (f, Qforeground_color,
tty_color_name (f, orig_bg));
redraw = 1;
}
if (!bg_set)
{
FRAME_BACKGROUND_PIXEL (f) = orig_fg;
update_face_from_frame_parameter (f, Qbackground_color,
tty_color_name (f, orig_fg));
redraw = 1;
}
}
if (redraw)
{
face_change = true; /* forces xdisp.c to recompute basic faces */
if (f == SELECTED_FRAME ())
redraw_frame (f);
}
}
extern void init_frame_faces (struct frame *);
#endif /* !HAVE_X_WINDOWS */
/* Do we need the internal terminal? */
void
internal_terminal_init (void)
{
static int init_needed = 1;
char *term = getenv ("TERM"), *colors;
struct frame *sf = SELECTED_FRAME ();
struct tty_display_info *tty;
#ifdef HAVE_X_WINDOWS
if (!inhibit_window_system)
return;
#endif
/* If this is the initial terminal, we are done here. */
if (sf->output_method == output_initial)
return;
internal_terminal
= (!noninteractive) && term && !strcmp (term, "internal");
#ifndef HAVE_X_WINDOWS
if (!internal_terminal || inhibit_window_system)
{
sf->output_method = output_termcap;
return;
}
tty = FRAME_TTY (sf);
kset_window_system (current_kboard, Qpc);
sf->output_method = output_msdos_raw;
if (init_needed)
{
if (!tty->termscript && getenv ("EMACSTEST"))
tty->termscript = fopen (getenv ("EMACSTEST"), "wt");
if (tty->termscript)
{
time_t now = time (NULL);
struct tm *tnow = localtime (&now);
char tbuf[100];
strftime (tbuf, sizeof (tbuf) - 1, "%a %b %e %Y %H:%M:%S %Z", tnow);
fprintf (tty->termscript, "\nEmacs session started at %s\n", tbuf);
fprintf (tty->termscript, "=====================\n\n");
}
Vinitial_window_system = Qpc;
tty->terminal->type = 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;
FRAME_BACKGROUND_PIXEL (SELECTED_FRAME ()) = 7; /* White */
FRAME_FOREGROUND_PIXEL (SELECTED_FRAME ()) = 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)
FRAME_FOREGROUND_PIXEL (SELECTED_FRAME ()) = 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)
FRAME_BACKGROUND_PIXEL (SELECTED_FRAME ()) = colors[1];
}
reset_mouse_highlight (&the_only_display_info.mouse_highlight);
if (have_mouse) /* detected in dos_ttraw, which see */
{
have_mouse = 1; /* enable mouse */
mouse_visible = 0;
mouse_setup_buttons (mouse_button_count);
tty->terminal->mouse_position_hook = &mouse_get_pos;
mouse_init ();
}
if (tty->termscript && screen_size)
fprintf (tty->termscript, "\n",
screen_size_X, screen_size_Y);
init_frame_faces (sf);
init_needed = 0;
}
#endif
}
void
initialize_msdos_display (struct terminal *term)
{
term->rif = 0; /* we don't support window-based display */
term->cursor_to_hook = term->raw_cursor_to_hook = IT_cursor_to;
term->clear_to_end_hook = IT_clear_to_end;
term->clear_frame_hook = IT_clear_screen;
term->clear_end_of_line_hook = IT_clear_end_of_line;
term->ins_del_lines_hook = 0;
term->insert_glyphs_hook = IT_insert_glyphs;
term->write_glyphs_hook = IT_write_glyphs;
term->delete_glyphs_hook = IT_delete_glyphs;
term->ring_bell_hook = IT_ring_bell;
term->reset_terminal_modes_hook = IT_reset_terminal_modes;
term->set_terminal_modes_hook = IT_set_terminal_modes;
term->set_terminal_window_hook = NULL;
term->update_begin_hook = IT_update_begin;
term->update_end_hook = IT_update_end;
term->frame_up_to_date_hook = IT_frame_up_to_date;
term->mouse_position_hook = 0; /* set later by dos_ttraw */
term->menu_show_hook = x_menu_show;
term->frame_rehighlight_hook = 0;
term->frame_raise_lower_hook = 0;
term->set_vertical_scroll_bar_hook = 0;
term->condemn_scroll_bars_hook = 0;
term->redeem_scroll_bar_hook = 0;
term->judge_scroll_bars_hook = 0;
term->read_socket_hook = &tty_read_avail_input; /* from keyboard.c */
term->defined_color_hook = &tty_defined_color; /* from xfaces.c */
}
int
dos_get_saved_screen (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
}
/* ----------------------- 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 123 45678901234 */
"`1234567890-= qwertyuiop[] asdfghjkl;'\\ \\zxcvbnm,./ ",
/* 0123456789012345678901234567890123456789 012345678901234 */
"~!@#$%^&*()_+ QWERTYUIOP{} ASDFGHJKL:\"| |ZXCVBNM<>? ",
0, /* no Alt-Gr key */
0 /* no translate table */
};
static struct dos_keyboard_map fr_keyboard = {
/* 0 1 2 3 4 5 */
/* 012 3456789012345678901234567890123456789012345678901234 */
"&\"'(-_)= azertyuiop^$ qsdfghjklm* WXCVBN?./ ",
/* 01234567 89012345678901234567890123456789012345678901234 */
" ~#{[|`\\^@]} ",
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
*/
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 QWERTYUIOP* ASDFGHJKL >ZXCVBNM;:_ ",
/* 0123456789012345678901234567890123456789012345678901234 */
" {}~` [] @# ",
it_kbd_translate_table
};
static struct dos_keyboard_map dk_keyboard = {
/* 0 1 2 3 4 5 */
/* 0123456789012345678901234567890123456789012345678901234 */
"1234567890+| 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-^\\ qwertyuiop@[ 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 (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 (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. */)
(void)
{
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);
vcopy (val, 0, keys + recent_doskeys_index,
NUM_RECENT_DOSKEYS - recent_doskeys_index);
vcopy (val, NUM_RECENT_DOSKEYS - recent_doskeys_index,
keys, recent_doskeys_index);
return val;
}
}
/* Get a char from keyboard. Function keys are put into the event queue. */
static int
dos_rawgetc (void)
{
struct input_event event;
union REGS regs;
Mouse_HLInfo *hlinfo = MOUSE_HL_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;
ASET (recent_doskeys, recent_doskeys_index, make_fixnum (c));
recent_doskeys_index++;
if (recent_doskeys_index == NUM_RECENT_DOSKEYS)
recent_doskeys_index = 0;
ASET (recent_doskeys, recent_doskeys_index, make_fixnum (sc));
recent_doskeys_index++;
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 only if 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;
}
if (code == 0)
continue;
if (!hlinfo->mouse_face_hidden && FIXNUMP (Vmouse_highlight))
{
clear_mouse_face (hlinfo);
hlinfo->mouse_face_hidden = 1;
}
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 (hlinfo->mouse_face_hidden)
{
hlinfo->mouse_face_hidden = 0;
clear_mouse_face (hlinfo);
}
/* Generate SELECT_WINDOW_EVENTs when needed. */
if (!NILP (Vmouse_autoselect_window))
{
static Lisp_Object last_mouse_window;
mouse_window = window_from_coordinates
(SELECTED_FRAME (), mouse_last_x, mouse_last_y, 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);
}
/* Remember the last window where we saw the mouse. */
last_mouse_window = mouse_window;
}
previous_help_echo_string = help_echo_string;
help_echo_string = help_echo_object = help_echo_window = Qnil;
help_echo_pos = -1;
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))
gen_help_event (help_echo_string, selected_frame, help_echo_window,
help_echo_object, help_echo_pos);
}
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 = make_fixnum (x);
event.y = make_fixnum (y);
event.frame_or_window = selected_frame;
event.arg = tty_handle_tab_bar_click (SELECTED_FRAME (),
x, y, press, &event);
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. */
int
dos_keysns (void)
{
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. */
int
dos_keyread (void)
{
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 const 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 (void)
{
XMenu *menu;
menu = 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 = xmalloc (count * sizeof (char *));
menu->submenu = xmalloc (count * sizeof (XMenu *));
menu->panenumber = xmalloc (count * sizeof (int));
menu->help_text = 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
= (const 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. */
#define BUILD_CHAR_GLYPH(GLYPH, CODE, FACE_ID, PADDING_P) \
do \
{ \
(GLYPH).type = CHAR_GLYPH; \
SET_CHAR_GLYPH ((GLYPH), CODE, FACE_ID, PADDING_P); \
(GLYPH).charpos = -1; \
} \
while (0)
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;
const unsigned char *q;
struct frame *sf = SELECTED_FRAME ();
menu_help_message = NULL;
width = menu->width;
/* We multiply width by 2 to account for possible control characters.
FIXME: cater to non-ASCII characters in menus. */
text = xmalloc ((width * 2 + 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 (sf, y + i, x);
enabled
= (!menu->submenu[i] && menu->panenumber[i]) || (menu->submenu[i]);
mousehere = (y + i == my && x <= mx && mx < x + max_width);
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;
BUILD_CHAR_GLYPH (*p, ' ', face, 0);
p++;
for (j = 0, q = menu->text[i]; *q; j++)
{
unsigned c = string_char_advance (&q);
if (c > 26)
{
BUILD_CHAR_GLYPH (*p, c, face, 0);
p++;
}
else /* make '^x' */
{
BUILD_CHAR_GLYPH (*p, '^', face, 0);
p++;
j++;
BUILD_CHAR_GLYPH (*p, c + 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++)
BUILD_CHAR_GLYPH (*p, ' ', face, 0);
/* 16 is the character code of a character that on DOS terminal
produces a nice-looking right-pointing arrow glyph. */
BUILD_CHAR_GLYPH (*p, menu->submenu[i] ? 16 : ' ', face, 0);
p++;
IT_write_glyphs (sf, text, max_width);
}
IT_update_end (sf);
IT_cursor_to (sf, row, col);
xfree (text);
}
/* --------------------------- X Menu emulation ---------------------- */
/* 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, const char *txt, int enable)
{
int len;
const char *p;
if (!enable)
emacs_abort ();
IT_menu_make_room (menu);
menu->submenu[menu->count] = IT_menu_create ();
menu->text[menu->count] = (char *)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 const *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 const *, 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 (NULL, sf, intern ("msdos-menu-passive-face"),
DEFAULT_FACE_ID, 1);
faces[1]
= lookup_derived_face (NULL, sf, intern ("msdos-menu-active-face"),
DEFAULT_FACE_ID, 1);
selectface = intern ("msdos-menu-select-face");
faces[2] = lookup_derived_face (NULL, sf, selectface,
faces[0], 1);
faces[3] = lookup_derived_face (NULL, sf, selectface,
faces[1], 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);
message1 (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 ())
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;
}
#endif /* !HAVE_X_WINDOWS */
/* ----------------------- DOS / UNIX conversion --------------------- */
void msdos_downcase_filename (unsigned char *);
/* Destructively turn backslashes into slashes. */
void
dostounix_filename (char *p)
{
msdos_downcase_filename (p);
while (*p)
{
if (*p == '\\')
*p = '/';
p++;
}
}
/* Destructively turn slashes into backslashes. */
void
unixtodos_filename (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 (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 (int n, 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;
}
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 MS-DOS. */)
(void)
{
return (_USE_LFN ? Qt : Qnil);
}
/* Convert alphabetic characters in a filename to lower-case. */
void
msdos_downcase_filename (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. */)
(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 (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 (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 = ARRAYELTS (tempdirs);
/* Make sure they have a usable $TMPDIR. Many Emacs functions use
temporary files and assume "/tmp" if $TMPDIR is unset, which
will break on DOS/Windows. Refuse to work if we cannot find
a directory, not even "c:/", usable for that purpose. */
for (i = 0; i < imax ; i++)
{
const char *tmp = tempdirs[i];
char buf[FILENAME_MAX];
if (*tmp == '$')
{
int tmp_len;
tmp = getenv (tmp + 1);
if (!tmp)
continue;
/* Some lusers set TMPDIR=e:, probably because some losing
programs cannot handle multiple slashes if they use e:/.
e: fails in `access' below, so we interpret e: as e:/. */
tmp_len = strlen (tmp);
if (tmp[tmp_len - 1] != '/' && tmp[tmp_len - 1] != '\\')
{
strcpy (buf, tmp);
buf[tmp_len++] = '/', buf[tmp_len] = 0;
tmp = buf;
}
}
/* 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. */
/* Turn off Dos' Ctrl-C checking and inhibit interpretation of
control chars by DOS. Determine the keyboard type. */
int
dos_ttraw (struct tty_display_info *tty)
{
union REGS inregs, outregs;
static int first_time = 1;
/* If we are called for the initial terminal, it's too early to do
anything, and termscript isn't set up. */
if (tty->terminal->type == output_initial)
return 2;
break_stat = getcbrk ();
setcbrk (0);
if (first_time)
{
inregs.h.ah = 0xc0;
int86 (0x15, &inregs, &outregs);
extended_kbd = (!outregs.x.cflag) && (outregs.h.ah == 0);
have_mouse = 0;
if (1
#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)
mouse_button_count = outregs.x.bx;
#ifndef HAVE_X_WINDOWS
/* Save the cursor shape used outside Emacs. */
outside_cursor = _farpeekw (_dos_ds, 0x460);
#endif
}
first_time = 0;
stdin_stat = setmode (fileno (stdin), O_BINARY);
return (stdin_stat != -1);
}
else
return (setmode (fileno (stdin), O_BINARY) != -1);
}
/* Restore status of standard input and Ctrl-C checking. */
int
dos_ttcooked (void)
{
union REGS inregs, outregs;
setcbrk (break_stat);
mouse_off ();
#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);
}
/* 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 (char **argv, const char *working_dir,
int tempin, int tempout, int 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);
if (!noninteractive)
dos_ttcooked (); /* do it here while 0 = stdin */
dup2 (tempin, 0);
dup2 (tempout, 1);
dup2 (temperr, 2);
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 **SYS_ENVIRON;
char **save_env = SYS_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);
SYS_ENVIRON = envv;
result = system (cmnd);
__system_flags = save_system_flags;
SYS_ENVIRON = save_env;
}
else
result = 0; /* emulate Unixy shell behavior with empty cmd line */
}
else
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);
if (!noninteractive)
dos_ttraw (CURTTY ());
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. */
if (!noninteractive)
bright_bg ();
done:
chdir (oldwd);
if (msshell)
{
argv[1] = saveargv1;
argv[2] = saveargv2;
}
return result;
}
void
croak (char *badfunc)
{
fprintf (stderr, "%s not yet implemented\r\n", badfunc);
reset_all_sys_modes ();
exit (1);
}
/*
* A few unimplemented functions that we silently ignore.
*/
pid_t tcgetpgrp (int fd) { return 0; }
int setpgid (int pid, int pgid) { return 0; }
int setpriority (int x, int y, int z) { return 0; }
pid_t setsid (void) { return 0; }
/* Gnulib support and emulation. */
#if __DJGPP__ == 2 && __DJGPP_MINOR__ < 4
ssize_t
readlink (const char *name, char *dummy1, size_t dummy2)
{
/* `access' is much faster than `stat' on MS-DOS. */
if (access (name, F_OK) == 0)
errno = EINVAL;
return -1;
}
#endif
/* dir_pathname is set by sys_opendir and used in readlinkat and in
fstatat, when they get a special FD of zero, which means use the
last directory opened by opendir. */
static char dir_pathname[MAXPATHLEN];
DIR *
sys_opendir (const char *dirname)
{
_fixpath (dirname, dir_pathname);
return opendir (dirname);
}
ssize_t
readlinkat (int fd, char const *name, char *buffer, size_t buffer_size)
{
/* Rely on a hack: an open directory is modeled as file descriptor 0,
as in fstatat. FIXME: Add proper support for readlinkat. */
char fullname[MAXPATHLEN];
if (fd != AT_FDCWD)
{
if (strlen (dir_pathname) + strlen (name) + 1 >= MAXPATHLEN)
{
errno = ENAMETOOLONG;
return -1;
}
sprintf (fullname, "%s/%s", dir_pathname, name);
name = fullname;
}
return readlink (name, buffer, buffer_size);
}
int
openat (int fd, const char * path, int oflag, int mode)
{
/* Rely on a hack: an open directory is modeled as file descriptor 0,
as in fstatat. FIXME: Add proper support for openat. */
char fullname[MAXPATHLEN];
if (fd != AT_FDCWD)
{
if (strlen (dir_pathname) + strlen (path) + 1 >= MAXPATHLEN)
{
errno = ENAMETOOLONG;
return -1;
}
sprintf (fullname, "%s/%s", dir_pathname, path);
path = fullname;
}
return open (path, oflag, mode);
}
int
fchmodat (int fd, const char *path, mode_t mode, int flags)
{
/* Rely on a hack: an open directory is modeled as file descriptor 0,
as in fstatat. FIXME: Add proper support for openat. */
char fullname[MAXPATHLEN];
if (fd != AT_FDCWD)
{
if (strlen (dir_pathname) + strlen (path) + 1 >= MAXPATHLEN)
{
errno = ENAMETOOLONG;
return -1;
}
sprintf (fullname, "%s/%s", dir_pathname, path);
path = fullname;
}
return chmod (path, mode);
}
char *
careadlinkat (int fd, char const *filename,
char *buffer, size_t buffer_size,
struct allocator const *alloc,
ssize_t (*preadlinkat) (int, char const *, char *, size_t))
{
if (!buffer)
{
/* We don't support the fancy auto-allocation feature. */
if (!buffer_size)
errno = ENOSYS;
else
errno = EINVAL;
buffer = NULL;
}
else
{
ssize_t len = preadlinkat (fd, filename, buffer, buffer_size);
if (len < 0 || len == buffer_size)
buffer = NULL;
else
buffer[len + 1] = '\0';
}
return buffer;
}
int
futimens (int fd, const struct timespec times[2])
{
struct tm *tm;
struct ftime ft;
time_t t;
block_input ();
if (times[1].tv_sec == UTIME_NOW)
t = time (NULL);
else
t = times[1].tv_sec;
tm = localtime (&t);
ft.ft_tsec = min (29, tm->tm_sec / 2);
ft.ft_min = tm->tm_min;
ft.ft_hour = tm->tm_hour;
ft.ft_day = tm->tm_mday;
ft.ft_month = tm->tm_mon + 1;
ft.ft_year = max (0, tm->tm_year - 80);
unblock_input ();
return setftime (fd, &ft);
}
int
utimensat (int dirfd, const char *pathname,
const struct timespec times[2], int flags)
{
int fd, ret;
char fullname[MAXPATHLEN];
/* Rely on a hack: dirfd in its current usage in Emacs is always
AT_FDCWD. */
if (dirfd != AT_FDCWD)
{
if (strlen (dir_pathname) + strlen (pathname) + 1 >= MAXPATHLEN)
{
errno = ENAMETOOLONG;
return -1;
}
sprintf (fullname, "%s/%s", dir_pathname, pathname);
pathname = fullname;
}
fd = open (pathname, O_WRONLY);
if (fd < 0)
return -1;
ret = futimens (fd, times);
close (fd);
return ret;
}
/* Emulate faccessat(2). */
int
faccessat (int dirfd, const char * path, int mode, int flags)
{
char fullname[MAXPATHLEN];
/* We silently ignore FLAGS. */
flags = flags;
if (dirfd != AT_FDCWD
&& !(IS_DIRECTORY_SEP (path[0])
|| IS_DEVICE_SEP (path[1])))
{
char lastc = dir_pathname[strlen (dir_pathname) - 1];
if (strlen (dir_pathname) + strlen (path) + IS_DIRECTORY_SEP (lastc)
>= MAXPATHLEN)
{
errno = ENAMETOOLONG;
return -1;
}
sprintf (fullname, "%s%s%s",
dir_pathname, IS_DIRECTORY_SEP (lastc) ? "" : "/", path);
path = fullname;
}
if ((mode & F_OK) != 0 && IS_DIRECTORY_SEP (path[strlen (path) - 1]))
mode |= D_OK;
return access (path, mode);
}
/* Emulate fstatat. */
int
fstatat (int fd, char const *name, struct stat *st, int flags)
{
/* Rely on a hack: an open directory is modeled as file descriptor 0.
This is good enough for the current usage in Emacs, but is fragile.
FIXME: Add proper support for fdopendir, fstatat, readlinkat.
Gnulib does this and can serve as a model. */
char fullname[MAXPATHLEN];
flags = flags;
if (fd != AT_FDCWD)
{
char lastc = dir_pathname[strlen (dir_pathname) - 1];
if (strlen (dir_pathname) + strlen (name) + IS_DIRECTORY_SEP (lastc)
>= MAXPATHLEN)
{
errno = ENAMETOOLONG;
return -1;
}
sprintf (fullname, "%s%s%s",
dir_pathname, IS_DIRECTORY_SEP (lastc) ? "" : "/", name);
name = fullname;
}
#if __DJGPP__ > 2 || __DJGPP_MINOR__ > 3
return (flags & AT_SYMLINK_NOFOLLOW) ? lstat (name, st) : stat (name, st);
#else
return stat (name, st);
#endif
}
#if __DJGPP__ == 2 && __DJGPP_MINOR__ < 4
/* Emulate the Posix unsetenv. DJGPP v2.04 has this in the library. */
int
unsetenv (const char *name)
{
char *var;
size_t name_len;
int retval;
if (name == NULL || *name == '\0' || strchr (name, '=') != NULL)
{
errno = EINVAL;
return -1;
}
/* DJGPP's 'putenv' deletes the entry if it doesn't include '='. */
putenv (name);
return 0;
}
#endif
#ifndef HAVE_SELECT
#include "sysselect.h"
/* 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_output takes care of that. */
int
sys_select (int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds,
struct timespec *timeout, void *ignored)
{
int check_input;
struct timespec 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)
emacs_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
{
struct timespec clnow, cllast, cldiff;
gettime (&t);
cllast = make_timespec (t.tv_sec, t.tv_nsec);
while (!check_input || !detect_input_pending ())
{
gettime (&t);
clnow = make_timespec (t.tv_sec, t.tv_nsec);
cldiff = timespec_sub (clnow, cllast);
/* Stop when timeout value is about to cross zero. */
if (timespec_cmp (*timeout, cldiff) <= 0)
{
timeout->tv_sec = 0;
timeout->tv_nsec = 0;
return 0;
}
*timeout = timespec_sub (*timeout, cldiff);
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 (const char *);
int
sys_chdir (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 (void)
{
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
static void
msdos_abort (void)
{
dos_ttcooked ();
ScreenSetCursor (10, 0);
cputs ("\r\n\nEmacs aborted!\r\n");
raise (SIGABRT);
exit (2);
}
void
msdos_fatal_signal (int sig)
{
if (sig == SIGABRT)
msdos_abort ();
else
raise (sig);
}
void
syms_of_msdos (void)
{
recent_doskeys = Fmake_vector (make_fixnum (NUM_RECENT_DOSKEYS), Qnil);
staticpro (&recent_doskeys);
#ifndef HAVE_X_WINDOWS
/* The following two are from xfns.c: */
DEFSYM (Qreverse, "reverse");
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 MS-DOS terminals. */);
Vdos_unsupported_char_glyph = make_fixnum ('\177');
#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 */