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vim/src/os_msdos.c
Bram Moolenaar a2974d70f1 updated for version 7.2-233
2009-07-14 16:38:36 +00:00

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/* vi:set ts=8 sts=4 sw=4:
*
* VIM - Vi IMproved by Bram Moolenaar
*
* Do ":help uganda" in Vim to read copying and usage conditions.
* Do ":help credits" in Vim to see a list of people who contributed.
* See README.txt for an overview of the Vim source code.
*/
/*
* os_msdos.c
*
* MSDOS system-dependent routines.
* A cheap plastic imitation of the amiga dependent code.
* A lot in this file was made by Juergen Weigert (jw).
*
* DJGPP changes by Gert van Antwerpen
* Faster text screens by John Lange (jlange@zilker.net)
* Windows clipboard functionality added by David Kotchan (dk)
*
* Some functions are also used for Win16 (MS-Windows 3.1).
*/
#include "vimio.h"
#include "vim.h"
#include <conio.h>
/*
* MS-DOS only code, not used for Win16.
*/
#ifndef WIN16
#include <bios.h>
#ifdef DJGPP
# include <dpmi.h>
# include <signal.h>
# include <sys/movedata.h>
# include <crt0.h>
# ifdef FEAT_CLIPBOARD
# include <sys/segments.h>
# endif
#else
# include <alloc.h>
#endif
#if defined(DJGPP) || defined(PROTO)
# define _cdecl /* DJGPP doesn't have this */
#endif
static int cbrk_pressed = FALSE; /* set by ctrl-break interrupt */
static int ctrlc_pressed = FALSE; /* set when ctrl-C or ctrl-break detected */
static int delayed_redraw = FALSE; /* set when ctrl-C detected */
static int bioskey_read = _NKEYBRD_READ; /* bioskey() argument: read key */
static int bioskey_ready = _NKEYBRD_READY; /* bioskey() argument: key ready? */
#ifdef FEAT_MOUSE
static int mouse_avail = FALSE; /* mouse present */
static int mouse_active; /* mouse enabled */
static int mouse_hidden; /* mouse not shown */
static int mouse_click = -1; /* mouse status */
static int mouse_last_click = -1; /* previous status at click */
static int mouse_x = -1; /* mouse x coordinate */
static int mouse_y = -1; /* mouse y coordinate */
static long mouse_click_time = 0; /* biostime() of last click */
static int mouse_click_count = 0; /* count for multi-clicks */
static int mouse_click_x = 0; /* x of previous mouse click */
static int mouse_click_y = 0; /* y of previous mouse click */
static linenr_T mouse_topline = 0; /* w_topline at previous mouse click */
#ifdef FEAT_DIFF
static int mouse_topfill = 0; /* w_topfill at previous mouse click */
#endif
static int mouse_x_div = 8; /* column = x coord / mouse_x_div */
static int mouse_y_div = 8; /* line = y coord / mouse_y_div */
#endif
#define BIOSTICK 55 /* biostime() increases one tick about
every 55 msec */
static int orig_attr = 0x0700; /* video attributes when starting */
static int S_iLeft = 0; /* Scroll window; these are 1 offset */
static int S_iTop = 0;
static int S_iRight = 0;
static int S_iBottom = 0;
/*
* Need to remember the values, because we set horizontal and vertical
* edges separately.
*/
static void
mywindow(int iLeft, int iTop, int iRight, int iBottom)
{
S_iLeft = iLeft;
S_iTop = iTop;
S_iRight = iRight;
S_iBottom = iBottom;
window(iLeft, iTop, iRight, iBottom);
}
#ifdef DJGPP
/*
* For DJGPP, use our own functions for fast text screens. JML 1/18/98
*/
unsigned long S_ulScreenBase = 0xb8000;
unsigned short S_uiAttribute = 0;
int S_iCurrentRow = 0; /* These are 0 offset */
int S_iCurrentColumn = 0;
short S_selVideo; /* Selector for DJGPP direct video transfers */
/*
* Use burst writes to improve mch_write speed - VJN 01/10/99
*/
unsigned short S_linebuffer[8000]; /* <VN> enough for 160x50 */
unsigned short S_blankbuffer[256]; /* <VN> max length of console line */
unsigned short *S_linebufferpos = S_linebuffer;
int S_iBufferRow;
int S_iBufferColumn;
static void
myflush(void)
{
if (S_linebufferpos != S_linebuffer)
{
_dosmemputw(S_linebuffer, (S_linebufferpos - S_linebuffer),
S_ulScreenBase
+ S_iBufferRow * (Columns << 1) + (S_iBufferColumn << 1));
S_linebufferpos = S_linebuffer;
}
}
static void
mygotoxy(int x, int y)
{
S_iCurrentRow = y - 1;
S_iCurrentColumn = x - 1;
}
/*
* Set the system cursor to our cursor position.
*/
static void
set_sys_cursor(void)
{
if (term_console && full_screen)
{
myflush();
gotoxy(S_iCurrentColumn + 1, S_iCurrentRow + 1);
}
}
static void
setblankbuffer(unsigned short uiValue)
{
int i;
static unsigned short olduiValue = 0;
if (olduiValue != uiValue)
{
/* Load blank line buffer with spaces */
for (i = 0; i < Columns; ++i)
S_blankbuffer[i] = uiValue;
olduiValue = uiValue;
}
}
static void
myclreol(void)
{
/* Clear to end of line */
setblankbuffer(S_uiAttribute | ' ');
_dosmemputw(S_blankbuffer, S_iRight - S_iCurrentColumn, S_ulScreenBase
+ (S_iCurrentRow) * (Columns << 1)
+ (S_iCurrentColumn << 1));
}
static void
myclrscr(void)
{
/* Clear whole screen */
short iColumn;
int endpoint = (Rows * Columns) << 1;
setblankbuffer(S_uiAttribute | ' ');
for (iColumn = 0; iColumn < endpoint; iColumn += (Columns << 1))
_dosmemputw(S_blankbuffer, Columns, S_ulScreenBase + iColumn);
}
static void
mydelline(void)
{
short iRow, iColumn;
iColumn = (S_iLeft - 1) << 1;
/* Copy the lines underneath */
for (iRow = S_iCurrentRow; iRow < S_iBottom - 1; iRow++)
movedata(S_selVideo, (((iRow + 1) * Columns) << 1) + iColumn,
S_selVideo, ((iRow * Columns) << 1) + iColumn,
(S_iRight - S_iLeft + 1) << 1);
/* Clear the new row */
setblankbuffer(S_uiAttribute | ' ');
_dosmemputw(S_blankbuffer, (S_iRight - S_iLeft) + 1, S_ulScreenBase
+ (S_iBottom - 1) * (Columns << 1) + iColumn);
}
static void
myinsline(void)
{
short iRow, iColumn;
iColumn = (S_iLeft - 1) << 1;
/* Copy the lines underneath */
for (iRow = S_iBottom - 1; iRow >= S_iTop; iRow--)
movedata(S_selVideo, (((iRow - 1) * Columns) << 1) + iColumn,
S_selVideo, ((iRow * Columns) << 1) + iColumn,
(S_iRight - S_iLeft + 1) << 1);
/* Clear the new row */
setblankbuffer(S_uiAttribute | ' ');
_dosmemputw(S_blankbuffer, (S_iRight - S_iLeft) + 1, S_ulScreenBase
+ (S_iTop - 1) * (Columns << 1) + iColumn);
}
/*
* Scroll the screen one line up, clear the last line.
*/
static void
myscroll(void)
{
short iRow, iColumn;
iColumn = (S_iLeft - 1) << 1;
/* Copy the screen */
for (iRow = S_iTop; iRow < S_iBottom; iRow++)
movedata(S_selVideo, ((iRow * Columns) << 1) + iColumn,
S_selVideo, (((iRow - 1) * Columns) << 1) + iColumn,
(S_iRight - S_iLeft + 1) << 1);
/* Clear the bottom row */
setblankbuffer(S_uiAttribute | ' ');
_dosmemputw(S_blankbuffer, (S_iRight - S_iLeft) + 1, S_ulScreenBase
+ (S_iBottom - 1) * (Columns << 1) + iColumn);
}
static int
myputch(int iChar)
{
unsigned short uiValue;
if (iChar == '\n')
{
myflush();
if (S_iCurrentRow >= S_iBottom - S_iTop)
myscroll();
else
{
S_iCurrentColumn = S_iLeft - 1;
S_iCurrentRow++;
}
}
else if (iChar == '\r')
{
myflush();
S_iCurrentColumn = S_iLeft - 1;
}
else if (iChar == '\b')
{
myflush();
if (S_iCurrentColumn >= S_iLeft)
S_iCurrentColumn--;
}
else if (iChar == 7)
{
sound(440); /* short beep */
delay(200);
nosound();
}
else
{
uiValue = S_uiAttribute | (unsigned char)iChar;
/*
* Normal char - are we starting to buffer?
*/
if (S_linebufferpos == S_linebuffer)
{
S_iBufferColumn = S_iCurrentColumn;
S_iBufferRow = S_iCurrentRow;
}
*S_linebufferpos++ = uiValue;
S_iCurrentColumn++;
if (S_iCurrentColumn >= S_iRight && S_iCurrentRow >= S_iBottom - S_iTop)
{
myflush();
myscroll();
S_iCurrentColumn = S_iLeft - 1;
S_iCurrentRow++;
}
}
return 0;
}
static void
mytextinit(struct text_info *pTextinfo)
{
S_selVideo = __dpmi_segment_to_descriptor(S_ulScreenBase >> 4);
S_uiAttribute = pTextinfo->normattr << 8;
}
static void
get_screenbase(void)
{
static union REGS regs;
/* old Hercules grafic card has different base address (Macewicz) */
regs.h.ah = 0x0f;
(void)int86(0x10, &regs, &regs); /* int 10 0f */
if (regs.h.al == 0x07) /* video mode 7 -- hercules mono */
S_ulScreenBase = 0xb0000;
else
S_ulScreenBase = 0xb8000;
}
static void
mytextattr(int iAttribute)
{
S_uiAttribute = (unsigned short)iAttribute << 8;
}
static void
mynormvideo(void)
{
mytextattr(orig_attr);
}
static void
mytextcolor(int iTextColor)
{
S_uiAttribute = (unsigned short)((S_uiAttribute & 0xf000)
| (unsigned short)iTextColor << 8);
}
static void
mytextbackground(int iBkgColor)
{
S_uiAttribute = (unsigned short)((S_uiAttribute & 0x0f00)
| (unsigned short)(iBkgColor << 12));
}
/*
* Getdigits: Get a number from a string and skip over it.
* Note: the argument is a pointer to a char_u pointer!
*/
static long
mygetdigits(pp)
char_u **pp;
{
char_u *p;
long retval = 0;
p = *pp;
if (*p == '-') /* skip negative sign */
++p;
while (VIM_ISDIGIT(*p))
{
retval = (retval * 10) + (*p - '0');
++p;
}
if (**pp == '-') /* process negative sign */
retval = -retval;
*pp = p;
return retval;
}
#else
# define mygotoxy gotoxy
# define myputch putch
# define myscroll scroll
# define mynormvideo normvideo
# define mytextattr textattr
# define mytextcolor textcolor
# define mytextbackground textbackground
# define mygetdigits getdigits
# define myclreol clreol
# define myclrscr clrscr
# define myinsline insline
# define mydelline delline
#endif
static const struct
{
char_u scancode;
char_u metakey;
} altkey_table[] =
{
{0x1e, 0xe1}, /* a */
{0x30, 0xe2}, /* b */
{0x2e, 0xe3}, /* c */
{0x20, 0xe4}, /* d */
{0x12, 0xe5}, /* e */
{0x21, 0xe6}, /* f */
{0x22, 0xe7}, /* g */
{0x23, 0xe8}, /* h */
{0x17, 0xe9}, /* i */
{0x24, 0xea}, /* j */
{0x25, 0xeb}, /* k */
{0x26, 0xec}, /* l */
{0x32, 0xed}, /* m */
{0x31, 0xee}, /* n */
{0x18, 0xef}, /* o */
{0x19, 0xf0}, /* p */
{0x10, 0xf1}, /* q */
{0x13, 0xf2}, /* r */
{0x1f, 0xf3}, /* s */
{0x14, 0xf4}, /* t */
{0x16, 0xf5}, /* u */
{0x2f, 0xf6}, /* v */
{0x11, 0xf7}, /* w */
{0x2d, 0xf8}, /* x */
{0x15, 0xf9}, /* y */
{0x2c, 0xfa}, /* z */
{0x78, 0xb1}, /* 1 */
{0x79, 0xb2}, /* 2 */
{0x7a, 0xb3}, /* 3 */
{0x7b, 0xb4}, /* 4 */
{0x7c, 0xb5}, /* 5 */
{0x7d, 0xb6}, /* 6 */
{0x7e, 0xb7}, /* 7 */
{0x7f, 0xb8}, /* 8 */
{0x80, 0xb9}, /* 9 */
{0x81, 0xb0}, /* 0 */
};
/*
* Translate extended keycodes into meta-chars where applicable
*/
static int
translate_altkeys(int rawkey)
{
int i, c;
if ((rawkey & 0xff) == 0)
{
c = (rawkey >> 8);
for (i = sizeof(altkey_table) / sizeof(altkey_table[0]); --i >= 0; )
{
if (c == altkey_table[i].scancode)
return (int)altkey_table[i].metakey;
}
}
return rawkey;
}
/*
* Set normal fg/bg color, based on T_ME. Called when t_me has been set.
*/
void
mch_set_normal_colors()
{
char_u *p;
int n;
cterm_normal_fg_color = (orig_attr & 0xf) + 1;
cterm_normal_bg_color = ((orig_attr >> 4) & 0xf) + 1;
if (T_ME[0] == ESC && T_ME[1] == '|')
{
p = T_ME + 2;
n = getdigits(&p);
if (*p == 'm' && n > 0)
{
cterm_normal_fg_color = (n & 0xf) + 1;
cterm_normal_bg_color = ((n >> 4) & 0xf) + 1;
}
}
}
#if defined(MCH_CURSOR_SHAPE) || defined(PROTO)
/*
* Save/restore the shape of the cursor.
* call with FALSE to save, TRUE to restore
*/
static void
mch_restore_cursor_shape(int restore)
{
static union REGS regs;
static int saved = FALSE;
if (restore)
{
if (saved)
regs.h.ah = 0x01; /* Set Cursor */
else
return;
}
else
{
regs.h.ah = 0x03; /* Get Cursor */
regs.h.bh = 0x00; /* Page */
saved = TRUE;
}
(void)int86(0x10, &regs, &regs);
}
/*
* Set the shape of the cursor.
* 'thickness' can be from 0 (thin) to 7 (block)
*/
static void
mch_set_cursor_shape(int thickness)
{
union REGS regs;
regs.h.ch = 7 - thickness; /* Starting Line */
regs.h.cl = 7; /* Ending Line */
regs.h.ah = 0x01; /* Set Cursor */
(void)int86(0x10, &regs, &regs);
}
void
mch_update_cursor(void)
{
int idx;
int thickness;
/*
* How the cursor is drawn depends on the current mode.
*/
idx = get_shape_idx(FALSE);
if (shape_table[idx].shape == SHAPE_BLOCK)
thickness = 7;
else
thickness = (7 * shape_table[idx].percentage + 90) / 100;
mch_set_cursor_shape(thickness);
}
#endif
/*
* Return amount of memory currently available.
*/
long_u
mch_avail_mem(int special)
{
#ifdef DJGPP
return _go32_dpmi_remaining_virtual_memory();
#else
return coreleft();
#endif
}
#ifdef FEAT_MOUSE
/*
* Set area where mouse can be moved to: The whole screen.
* Rows and Columns must be valid when calling!
*/
static void
mouse_area(void)
{
union REGS regs;
if (mouse_avail)
{
regs.x.cx = 0; /* mouse visible between cx and dx */
regs.x.dx = Columns * mouse_x_div - 1;
regs.x.ax = 7;
(void)int86(0x33, &regs, &regs);
regs.x.cx = 0; /* mouse visible between cx and dx */
regs.x.dx = Rows * mouse_y_div - 1;
regs.x.ax = 8;
(void)int86(0x33, &regs, &regs);
}
}
static void
show_mouse(int on)
{
static int was_on = FALSE;
union REGS regs;
if (mouse_avail)
{
if (!mouse_active || mouse_hidden)
on = FALSE;
/*
* Careful: Each switch on must be compensated by exactly one switch
* off
*/
if ((on && !was_on) || (!on && was_on))
{
was_on = on;
regs.x.ax = on ? 1 : 2;
int86(0x33, &regs, &regs); /* show mouse */
if (on)
mouse_area();
}
}
}
#endif
/*
* Version of kbhit() and getch() that use direct console I/O.
* This avoids trouble with CTRL-P and the like, and should work over a telnet
* connection (it works for Xvi).
*/
static int cons_key = -1;
/*
* Try to get one character directly from the console.
* If there is a key, it is stored in cons_key.
* Only call when cons_key is -1!
*/
static void
cons_getkey(void)
{
union REGS regs;
/* call DOS function 6: Direct console I/O */
regs.h.ah = 0x06;
regs.h.dl = 0xff;
(void)intdos(&regs, &regs);
if ((regs.x.flags & 0x40) == 0) /* zero flag not set? */
cons_key = (regs.h.al & 0xff);
}
/*
* Return TRUE if a character is available.
*/
static int
cons_kbhit(void)
{
if (cons_key < 0)
cons_getkey();
return (cons_key >= 0);
}
/*
* Return a character from the console.
* Should only be called when vim_kbhit() returns TRUE.
*/
static int
cons_getch(void)
{
int c = -1;
if (cons_key < 0)
cons_getkey();
c = cons_key;
cons_key = -1;
return c;
}
#ifdef DJGPP
/*
* DJGPP provides a kbhit() function that goes to the BIOS instead of DOS.
* This doesn't work for terminals connected to a serial port.
* Redefine kbhit() here to make it work.
*/
static int
vim_kbhit(void)
{
union REGS regs;
regs.h.ah = 0x0b;
(void)intdos(&regs, &regs);
return regs.h.al;
}
#ifdef kbhit
# undef kbhit /* might have been defined in conio.h */
#endif
#define kbhit() vim_kbhit()
#endif
/*
* Simulate WaitForChar() by slowly polling with bioskey(1) or kbhit().
*
* If Vim should work over the serial line after a 'ctty com1' we must use
* kbhit() and getch(). (jw)
* Usually kbhit() is not used, because then CTRL-C and CTRL-P
* will be catched by DOS (mool).
*
* return TRUE if a character is available, FALSE otherwise
*/
#define FOREVER 1999999999L
static int
WaitForChar(long msec)
{
long starttime = 0;
if (msec != 0)
starttime = biostime(0, 0L);
for (;;)
{
#ifdef FEAT_MOUSE
long clicktime;
static int old_status = 0;
union REGS regs;
int x, y;
if (mouse_avail && mouse_active && mouse_click < 0)
{
regs.x.ax = 3;
int86(0x33, &regs, &regs); /* check mouse status */
/* only recognize button-down and button-up event */
x = regs.x.cx / mouse_x_div;
y = regs.x.dx / mouse_y_div;
if ((old_status == 0) != (regs.x.bx == 0))
{
if (old_status) /* button up */
mouse_click = MOUSE_RELEASE;
else /* button down */
{
/*
* Translate MSDOS mouse events to Vim mouse events.
* TODO: should handle middle mouse button, by pressing
* left and right at the same time.
*/
if (regs.x.bx & MSDOS_MOUSE_LEFT)
mouse_click = MOUSE_LEFT;
else if (regs.x.bx & MSDOS_MOUSE_RIGHT)
mouse_click = MOUSE_RIGHT;
else if (regs.x.bx & MSDOS_MOUSE_MIDDLE)
mouse_click = MOUSE_MIDDLE;
/*
* Find out if this is a multi-click
*/
clicktime = biostime(0, 0L);
if (mouse_click_x == x && mouse_click_y == y
&& mouse_topline == curwin->w_topline
#ifdef FEAT_DIFF
&& mouse_topfill == curwin->w_topfill
#endif
&& mouse_click_count != 4
&& mouse_click == mouse_last_click
&& clicktime < mouse_click_time
+ p_mouset / BIOSTICK)
++mouse_click_count;
else
mouse_click_count = 1;
mouse_click_time = clicktime;
mouse_last_click = mouse_click;
mouse_click_x = x;
mouse_click_y = y;
mouse_topline = curwin->w_topline;
#ifdef FEAT_DIFF
mouse_topfill = curwin->w_topfill;
#endif
SET_NUM_MOUSE_CLICKS(mouse_click, mouse_click_count);
}
}
else if (old_status && (x != mouse_x || y != mouse_y))
mouse_click = MOUSE_DRAG;
old_status = regs.x.bx;
if (mouse_hidden && mouse_x >= 0 && (mouse_x != x || mouse_y != y))
{
mouse_hidden = FALSE;
show_mouse(TRUE);
}
mouse_x = x;
mouse_y = y;
}
#endif
if ((p_consk ? cons_kbhit()
: p_biosk ? bioskey(bioskey_ready) : kbhit())
|| cbrk_pressed
#ifdef FEAT_MOUSE
|| mouse_click >= 0
#endif
)
return TRUE;
/*
* Use biostime() to wait until our time is done.
* We busy-wait here. Unfortunately, delay() and usleep() have been
* reported to give problems with the original Windows 95. This is
* fixed in service pack 1, but not everybody installed that.
* The DJGPP implementation of usleep() uses a busy-wait loop too.
*/
if (msec == 0 || (msec != FOREVER
&& biostime(0, 0L) > starttime + msec / BIOSTICK))
break;
#ifdef DJGPP
/* Yield the CPU to the next process. */
__dpmi_yield();
#endif
}
return FALSE;
}
/*
* don't do anything for about "msec" msec
*/
void
mch_delay(
long msec,
int ignoreinput)
{
long starttime;
if (ignoreinput)
{
/*
* We busy-wait here. Unfortunately, delay() and usleep() have been
* reported to give problems with the original Windows 95. This is
* fixed in service pack 1, but not everybody installed that.
*/
starttime = biostime(0, 0L);
while (biostime(0, 0L) < starttime + msec / BIOSTICK)
;
}
else
WaitForChar(msec);
}
/*
* mch_write(): write the output buffer to the screen
*/
void
mch_write(
char_u *s,
int len)
{
char_u *p;
int row, col;
if (term_console && full_screen)
while (len--)
{
/* translate ESC | sequences into bios calls */
if (p_wd) /* testing: wait a bit for each char */
WaitForChar(p_wd);
if (s[0] == '\n')
#ifdef DJGPP
{
myflush();
S_iCurrentColumn = S_iLeft - 1;
}
#else
myputch('\r');
#endif
else if (s[0] == ESC && len > 1 && s[1] == '|')
{
switch (s[2])
{
#ifdef DJGPP
case 'B': ScreenVisualBell();
goto got3;
#endif
case 'J':
#ifdef DJGPP
myflush();
#endif
myclrscr();
goto got3;
case 'K':
#ifdef DJGPP
myflush();
#endif
myclreol();
goto got3;
case 'L':
#ifdef DJGPP
myflush();
#endif
myinsline();
goto got3;
case 'M':
#ifdef DJGPP
myflush();
#endif
mydelline();
got3: s += 3;
len -= 2;
continue;
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9': p = s + 2;
row = mygetdigits(&p); /* no check for length! */
if (p > s + len)
break;
if (*p == ';')
{
++p;
col = mygetdigits(&p); /* no check for length! */
if (p > s + len)
break;
if (*p == 'H' || *p == 'r' || *p == 'V')
{
#ifdef DJGPP
myflush();
#endif
if (*p == 'H') /* set cursor position */
mygotoxy(col, row);
else if (*p == 'V')
mywindow(row, S_iTop, col, S_iBottom);
else /* set scroll region */
mywindow(S_iLeft, row, S_iRight, col);
len -= p - s;
s = p + 1;
continue;
}
}
else if (*p == 'm' || *p == 'f' || *p == 'b')
{
if (*p == 'm') /* set color */
{
if (row == 0)
mynormvideo();/* reset color */
else
mytextattr(row);
}
else if (*p == 'f') /* set foreground color */
mytextcolor(row);
else /* set background color */
mytextbackground(row);
len -= p - s;
s = p + 1;
continue;
}
}
}
myputch(*s++);
}
else
{
write(1, s, (unsigned)len);
}
}
/*
* mch_inchar(): low level input funcion.
* Get a characters from the keyboard.
* If time == 0 do not wait for characters.
* If time == n wait a short time for characters.
* If time == -1 wait forever for characters.
*
* return the number of characters obtained
*/
int
mch_inchar(
char_u *buf,
int maxlen,
long time,
int tb_change_cnt)
{
int len = 0;
int c;
int tmp_c;
static int nextchar = 0; /* may keep character when maxlen == 1 */
/*
* if we got a ctrl-C when we were busy, there will be a "^C" somewhere
* on the sceen, so we need to redisplay it.
*/
if (delayed_redraw)
{
delayed_redraw = FALSE;
update_screen(CLEAR);
setcursor();
out_flush();
}
/* return remaining character from last call */
if (nextchar)
{
*buf = nextchar;
nextchar = 0;
return 1;
}
#ifdef FEAT_MOUSE
if (time != 0)
show_mouse(TRUE);
#endif
#ifdef DJGPP
set_sys_cursor();
#endif
if (time >= 0)
{
if (WaitForChar(time) == 0) /* no character available */
{
#ifdef FEAT_MOUSE
show_mouse(FALSE);
#endif
return 0;
}
}
else /* time == -1 */
{
/*
* If there is no character available within 2 seconds (default)
* write the autoscript file to disk. Or cause the CursorHold event
* to be triggered.
*/
if (WaitForChar(p_ut) == 0)
{
#ifdef FEAT_AUTOCMD
if (trigger_cursorhold() && maxlen >= 3)
{
buf[0] = K_SPECIAL;
buf[1] = KS_EXTRA;
buf[2] = (int)KE_CURSORHOLD;
return 3;
}
#endif
before_blocking();
}
}
WaitForChar(FOREVER); /* wait for key or mouse click */
/*
* Try to read as many characters as there are, until the buffer is full.
*/
/*
* we will get at least one key. Get more if they are available
* After a ctrl-break we have to read a 0 (!) from the buffer.
* bioskey(1) will return 0 if no key is available and when a
* ctrl-break was typed. When ctrl-break is hit, this does not always
* implies a key hit.
*/
cbrk_pressed = FALSE;
#ifdef FEAT_MOUSE
if (mouse_click >= 0 && maxlen >= 5)
{
len = 5;
*buf++ = ESC + 128;
*buf++ = 'M';
*buf++ = mouse_click;
*buf++ = mouse_x + '!';
*buf++ = mouse_y + '!';
mouse_click = -1;
}
else
#endif
{
#ifdef FEAT_MOUSE
mouse_hidden = TRUE;
#endif
if (p_biosk && !p_consk)
{
while ((len == 0 || bioskey(bioskey_ready)) && len < maxlen)
{
c = translate_altkeys(bioskey(bioskey_read)); /* get the key */
/*
* translate a few things for inchar():
* 0x0000 == CTRL-break -> 3 (CTRL-C)
* 0x0300 == CTRL-@ -> NUL
* 0xnn00 == extended key code -> K_NUL, nn
* 0xnne0 == enhanced keyboard -> K_NUL, nn
* K_NUL -> K_NUL, 3
*/
if (c == 0)
c = 3;
else if (c == 0x0300)
c = NUL;
else if ((c & 0xff) == 0
|| c == K_NUL
|| c == 0x4e2b
|| c == 0x4a2d
|| c == 0x372a
|| ((c & 0xff) == 0xe0 && c != 0xe0))
{
if (c == K_NUL)
c = 3;
else
c >>= 8;
*buf++ = K_NUL;
++len;
}
if (len < maxlen)
{
*buf++ = c;
len++;
#ifdef FEAT_MBYTE
/* Convert from 'termencoding' to 'encoding'. Only
* translate normal characters, not key codes. */
if (input_conv.vc_type != CONV_NONE
&& (len == 1 || buf[-2] != K_NUL))
len += convert_input(buf - 1, 1, maxlen - len + 1) - 1;
#endif
}
else
nextchar = c;
}
}
else
{
while ((len == 0 || (p_consk ? cons_kbhit() : kbhit()))
&& len < maxlen)
{
switch (c = (p_consk ? cons_getch() : getch()))
{
case 0:
/* NUL means that there is another character.
* Get it immediately, because kbhit() doesn't always
* return TRUE for the second character.
*/
if (p_consk)
c = cons_getch();
else
c = getch();
tmp_c = translate_altkeys(c << 8);
if (tmp_c == (c << 8))
{
*buf++ = K_NUL;
++len;
}
else
c = tmp_c;
break;
case K_NUL:
*buf++ = K_NUL;
++len;
c = 3;
break;
case 3:
cbrk_pressed = TRUE;
/*FALLTHROUGH*/
default:
break;
}
if (len < maxlen)
{
*buf++ = c;
++len;
}
else
nextchar = c;
}
}
}
#ifdef FEAT_MOUSE
show_mouse(FALSE);
#endif
beep_count = 0; /* may beep again now that we got some chars */
return len;
}
/*
* return non-zero if a character is available
*/
int
mch_char_avail(void)
{
return WaitForChar(0L);
}
#ifdef DJGPP
# define INT_ARG int
#else
# define INT_ARG
#endif
/*
* function for ctrl-break interrupt
*/
static void interrupt
#ifdef DJGPP
catch_cbrk(int a)
#else
catch_cbrk(void)
#endif
{
cbrk_pressed = TRUE;
ctrlc_pressed = TRUE;
}
#ifndef DJGPP
/*
* ctrl-break handler for DOS. Never called when a ctrl-break is typed, because
* we catch interrupt 1b. If you type ctrl-C while Vim is waiting for a
* character this function is not called. When a ctrl-C is typed while Vim is
* busy this function may be called. By that time a ^C has been displayed on
* the screen, so we have to redisplay the screen. We can't do that here,
* because we may be called by DOS. The redraw is in mch_inchar().
*/
static int _cdecl
cbrk_handler(void)
{
delayed_redraw = TRUE;
return 1; /* resume operation after ctrl-break */
}
/*
* function for critical error interrupt
* For DOS 1 and 2 return 0 (Ignore).
* For DOS 3 and later return 3 (Fail)
*/
static void interrupt
catch_cint(bp, di, si, ds, es, dx, cx, bx, ax)
unsigned bp, di, si, ds, es, dx, cx, bx, ax;
{
ax = (ax & 0xff00); /* set AL to 0 */
if (_osmajor >= 3)
ax |= 3; /* set AL to 3 */
}
#endif
/*
* Set the interrupt vectors for use with Vim on or off.
* on == TRUE means as used within Vim
*/
static void
set_interrupts(int on)
{
static int saved_cbrk;
#ifndef DJGPP
static void interrupt (*old_cint)();
#endif
static void interrupt (*old_cbrk)(INT_ARG);
if (on)
{
saved_cbrk = getcbrk(); /* save old ctrl-break setting */
setcbrk(0); /* do not check for ctrl-break */
#ifdef DJGPP
old_cbrk = signal(SIGINT, catch_cbrk); /* critical error interrupt */
#else
old_cint = getvect(0x24); /* save old critical error interrupt */
setvect(0x24, catch_cint); /* install our critical error interrupt */
old_cbrk = getvect(0x1B); /* save old ctrl-break interrupt */
setvect(0x1B, catch_cbrk); /* install our ctrl-break interrupt */
ctrlbrk(cbrk_handler); /* vim's ctrl-break handler */
#endif
if (term_console)
out_str(T_ME); /* set colors */
}
else
{
setcbrk(saved_cbrk); /* restore ctrl-break setting */
#ifdef DJGPP
signal(SIGINT,old_cbrk); /* critical error interrupt */
#else
setvect(0x24, old_cint); /* restore critical error interrupt */
setvect(0x1B, old_cbrk); /* restore ctrl-break interrupt */
#endif
/* restore ctrl-break handler, how ??? */
if (term_console)
mynormvideo(); /* restore screen colors */
}
}
/*
* We have no job control, fake it by starting a new shell.
*/
void
mch_suspend(void)
{
suspend_shell();
}
extern int _fmode;
/*
* Prepare window for use by Vim.
*/
void
mch_init(void)
{
union REGS regs;
#if defined(DJGPP) && defined(FEAT_CLIPBOARD)
__dpmi_regs dpmi_regs;
#endif
/*
* Get the video attributes at the cursor. These will be used as the
* default attributes.
*/
regs.h.ah = 0x08;
regs.h.bh = 0x00; /* video page 0 */
int86(0x10, &regs, &regs);
orig_attr = regs.h.ah;
mynormvideo();
if (cterm_normal_fg_color == 0)
cterm_normal_fg_color = (orig_attr & 0xf) + 1;
if (cterm_normal_bg_color == 0)
cterm_normal_bg_color = ((orig_attr >> 4) & 0xf) + 1;
term_console = TRUE; /* assume using the console for the things here */
_fmode = O_BINARY; /* we do our own CR-LF translation */
out_flush();
set_interrupts(TRUE); /* catch interrupts */
#ifdef DJGPP
/*
* Use Long File Names by default, if $LFN not set.
*/
if (getenv("LFN") == NULL)
putenv("LFN=y");
get_screenbase();
#endif
#ifdef FEAT_MOUSE
/* find out if a MS compatible mouse is available */
regs.x.ax = 0;
(void)int86(0x33, &regs, &regs);
mouse_avail = regs.x.ax;
/* best guess for mouse coordinate computations */
mch_get_shellsize();
if (Columns <= 40)
mouse_x_div = 16;
if (Rows == 30)
mouse_y_div = 16;
#endif
/*
* Try switching to 16 colors for background, instead of 8 colors and
* blinking. Does this always work? Can the old value be restored?
*/
regs.x.ax = 0x1003;
regs.h.bl = 0x00;
regs.h.bh = 0x00;
int86(0x10, &regs, &regs);
/*
* Test if we have an enhanced AT keyboard. Write 0xFFFF to the keyboard
* buffer and try to read it back. If we can't in 16 tries, it's an old
* type XT keyboard.
*/
regs.h.ah = 0x05;
regs.x.cx = 0xffff;
int86(0x16, &regs, &regs);
if (regs.h.al != 1) /* skip this when keyboard buffer is full */
{
int i;
for (i = 0; i < 16; ++i)
{
regs.h.ah = 0x10;
int86(0x16, &regs, &regs);
if (regs.x.ax == 0xffff)
break;
}
if (i == 16) /* 0xffff not read, must be old keyboard */
{
bioskey_read = 0;
bioskey_ready = 1;
}
}
#ifdef MCH_CURSOR_SHAPE
/* Save the old cursor shape */
mch_restore_cursor_shape(FALSE);
/* Initialise the cursor shape */
mch_update_cursor();
#endif
#if defined(DJGPP) && defined(FEAT_CLIPBOARD)
/*
* Check to see if the Windows clipboard is available, ie. are we
* running from a DOS session within Windows. Obviously, the Windows
* clipboard will not be available if we're running under pure DOS.
*
* int 0x2f, AX = 0x1700 identifies the Windows version we're running
* under. Upon return from the interrupt, if AX is unchanged, we're
* running under pure DOS and no Windows clipboard is available.
*
* Remark: could use int86() here but __dpmi_int() is recommended in
* the DJGPP docs, since int86() doesn't cover all available interrupts.
*/
dpmi_regs.x.ax = 0x1700;
if (__dpmi_int(0x2f, &dpmi_regs) == -1)
/* real-mode interrupt failed? */
dpmi_regs.x.ax = 0x1700; /* force failure */
if (dpmi_regs.x.ax == 0x1700) /* no change in AX? */
clip_init(FALSE); /* no clipboard available, too bad */
else /* else, running under Windows, OK */
clip_init(TRUE); /* clipboard is available */
#endif
}
int
mch_check_win(
int argc,
char **argv)
{
/* store argv[0], may be used for $VIM */
if (*argv[0] != NUL)
exe_name = FullName_save((char_u *)argv[0], FALSE);
/*
* Try the DOS search path. The executable may in
* fact be called differently, so try this last.
*/
if (exe_name == NULL || *exe_name == NUL)
exe_name = searchpath("vim.exe");
if (isatty(1))
return OK;
return FAIL;
}
/*
* Return TRUE if the input comes from a terminal, FALSE otherwise.
*/
int
mch_input_isatty(void)
{
if (isatty(read_cmd_fd))
return TRUE;
return FALSE;
}
#if defined(USE_FNAME_CASE) || defined(PROTO)
/*
* fname_case(): Set the case of the file name, if it already exists.
* TODO: should expand short to long file names. Need to use DOS interrupts,
* see DJGPP sources libc/dos/dir/findfirs.c.
*/
void
fname_case(char_u *name, int len)
{
char_u *tail;
struct ffblk fb;
slash_adjust(name);
if (findfirst(name, &fb, 0) == 0)
{
tail = gettail(name);
if (len == 0 ? STRLEN(tail) == STRLEN(fb.ff_name)
: (tail - name) + STRLEN(fb.ff_name) < len)
STRCPY(tail, fb.ff_name);
}
}
#endif
/*
* return process ID
*/
long
mch_get_pid(void)
{
return (long)0;
}
/*
* Change default drive (just like _chdrive of Borland C 3.1)
*/
static int
change_drive(int drive)
{
union REGS regs;
regs.h.ah = 0x0e;
regs.h.dl = drive - 1;
intdos(&regs, &regs); /* set default drive */
regs.h.ah = 0x19;
intdos(&regs, &regs); /* get default drive */
if (regs.h.al == drive - 1)
return 0;
return -1;
}
/*
* Get absolute file name into buffer 'buf' of length 'len' bytes.
* All slashes are replaced with backslashes, to avoid trouble when comparing
* file names. When 'shellslash' set do it the other way around.
*
* return FAIL for failure, OK otherwise
*/
int
mch_FullName(
char_u *fname,
char_u *buf,
int len,
int force)
{
if (!force && mch_isFullName(fname)) /* already expanded */
{
vim_strncpy(buf, fname, len - 1);
slash_adjust(buf);
return OK;
}
#ifdef __BORLANDC__ /* Only Borland C++ has this */
if (_fullpath((char *)buf, (char *)fname, len - 1) == NULL)
return FAIL;
return OK;
#else /* almost the same as mch_FullName() in os_unix.c */
{
# if 1
char_u fullpath[MAXPATHL];
if (!_truename(fname, fullpath))
return FAIL;
slash_adjust(fullpath); /* Only needed when 'shellslash' set */
vim_strncpy(buf, fullpath, len - 1);
return OK;
# else /* Old code, to be deleted... */
int l;
char_u olddir[MAXPATHL];
char_u *p, *q;
int c;
int retval = OK;
*buf = 0;
/*
* change to the directory for a moment,
* and then do the getwd() (and get back to where we were).
* This will get the correct path name with "../" things.
*/
p = vim_strrchr(fname, '/');
q = vim_strrchr(fname, '\\');
if (q != NULL && (p == NULL || q > p))
p = q;
q = vim_strrchr(fname, ':');
if (q != NULL && (p == NULL || q > p))
p = q;
if (p != NULL)
{
if (getcwd(olddir, MAXPATHL) == NULL)
{
p = NULL; /* can't get current dir: don't chdir */
retval = FAIL;
}
else
{
if (p == fname) /* /fname */
q = p + 1; /* -> / */
else if (q + 1 == p) /* ... c:\foo */
q = p + 1; /* -> c:\ */
else /* but c:\foo\bar */
q = p; /* -> c:\foo */
c = *q; /* truncate at start of fname */
*q = NUL;
# ifdef DJGPP
STRCPY(buf, fname);
slash_adjust(buf); /* needed when fname starts with \ */
if (mch_chdir(buf)) /* change to the directory */
# else
if (mch_chdir(fname)) /* change to the directory */
# endif
retval = FAIL;
else
{
fname = q;
if (c == psepc) /* if we cut the name at a */
fname++; /* '\', don't add it again */
}
*q = c;
}
}
if (getcwd(buf, len) == NULL)
{
retval = FAIL;
*buf = NUL;
}
# ifdef USE_FNAME_CASE
else
{
char_u *head;
char_u *tail;
struct ffblk fb;
int c;
int added;
/* Apparently "longna~1" isn't expanded by getcwd(), at least not
* for DJGPP. Expand it here. Have to do each dirname
* separately. */
slash_adjust(buf);
head = buf;
if (isalpha(*head) && head[1] == ':')
head += 2; /* skip "c:" */
while (*head != NUL)
{
/* Advance "head" to the start of a dirname and "tail" to just
* after it. */
while (*head == '/' || *head == '\\')
++head;
for (tail = head; *tail != NUL; ++tail)
if (*tail == '/' || *tail == '\\')
break;
c = *tail;
*tail = NUL;
if (findfirst(buf, &fb, FA_DIREC) == 0)
{
added = STRLEN(fb.ff_name);
if ((head - buf) + added + STRLEN(tail + 1) + 2 < len)
{
added -= (tail - head);
if (added != 0)
STRMOVE(tail + 1 + added, tail + 1);
STRCPY(head, fb.ff_name);
tail += added;
}
}
*tail = c;
head = tail;
}
}
# endif
if (p != NULL)
mch_chdir(olddir);
/*
* Concatenate the file name to the path.
*/
if (*fname != NUL)
{
l = STRLEN(buf);
if (l > 0 && buf[l - 1] != '/' && buf[l - 1] != '\\')
strcat(buf, pseps);
strcat(buf, fname);
}
return retval;
# endif
}
#endif
}
/*
* Replace all slashes by backslashes.
* This used to be the other way around, but MS-DOS sometimes has problems
* with slashes (e.g. in a command name). We can't have mixed slashes and
* backslashes, because comparing file names will not work correctly. The
* commands that use a file name should try to avoid the need to type a
* backslash twice.
* When 'shellslash' set do it the other way around.
*/
void
slash_adjust(char_u *p)
{
#ifdef OLD_DJGPP /* this seems to have been fixed in DJGPP 2.01 */
/* DJGPP can't handle a file name that starts with a backslash, and when it
* starts with a slash there should be no backslashes */
if (*p == '\\' || *p == '/')
while (*p)
{
if (*p == '\\')
*p = '/';
mb_ptr_adv(p);
}
else
#endif
while (*p)
{
if (*p == psepcN)
*p = psepc;
mb_ptr_adv(p);
}
}
/*
* Return TRUE if "fname" does not depend on the current directory.
*/
int
mch_isFullName(char_u *fname)
{
/* A name like "d:/foo" and "//server/share" is absolute */
return (fname[0] != NUL && fname[1] == ':'
&& (fname[2] == '/' || fname[2] == '\\'))
|| (fname[0] == fname[1] && (fname[0] == '/' || fname[0] == '\\'));
}
void
mch_early_init(void)
{
}
/*
* Careful: mch_exit() may be called before mch_init()!
*/
void
mch_exit(int r)
{
settmode(TMODE_COOK);
stoptermcap();
set_interrupts(FALSE); /* restore interrupts */
#ifdef DJGPP
set_sys_cursor();
#endif
/* Somehow outputting CR-NL causes the original colors to be restored */
out_char('\r');
out_char('\n');
out_flush();
ml_close_all(TRUE); /* remove all memfiles */
#ifdef MCH_CURSOR_SHAPE
mch_restore_cursor_shape(TRUE);
#endif
exit(r);
}
/*
* set the tty in (raw) ? "raw" : "cooked" mode
* Does not change the tty, as bioskey() and kbhit() work raw all the time.
*/
void
mch_settmode(int tmode)
{
}
#ifdef FEAT_MOUSE
void
mch_setmouse(int on)
{
mouse_active = on;
mouse_hidden = TRUE; /* dont show it until moved */
}
#endif
/*
* set screen mode
* return FAIL for failure, OK otherwise
*/
int
mch_screenmode(char_u *arg)
{
int mode;
int i;
static char *(names[]) = {"BW40", "C40", "BW80", "C80", "MONO", "C4350"};
static int modes[] = { BW40, C40, BW80, C80, MONO, C4350};
mode = -1;
if (VIM_ISDIGIT(*arg)) /* mode number given */
mode = atoi((char *)arg);
else
{
for (i = 0; i < sizeof(names) / sizeof(char_u *); ++i)
if (stricmp(names[i], (char *)arg) == 0)
{
mode = modes[i];
break;
}
}
if (mode == -1)
{
EMSG("E362: Unsupported screen mode");
return FAIL;
}
textmode(mode); /* use Borland function */
#ifdef DJGPP
/* base address may have changed */
get_screenbase();
#endif
/* Screen colors may have changed. */
out_str(T_ME);
#ifdef FEAT_MOUSE
if (mode <= 1 || mode == 4 || mode == 5 || mode == 13 || mode == 0x13)
mouse_x_div = 16;
else
mouse_x_div = 8;
if (mode == 0x11 || mode == 0x12)
mouse_y_div = 16;
else if (mode == 0x10)
mouse_y_div = 14;
else
mouse_y_div = 8;
shell_resized();
#endif
return OK;
}
/*
* Structure used by Turbo-C/Borland-C to store video parameters.
*/
#ifndef DJGPP
extern struct text_info _video;
#endif
/*
* try to get the real window size
* return FAIL for failure, OK otherwise
*/
int
mch_get_shellsize(void)
{
struct text_info textinfo;
/*
* The screenwidth is returned by the BIOS OK.
* The screenheight is in a location in the bios RAM, if the display is
* EGA or VGA.
*/
if (!term_console)
return FAIL;
gettextinfo(&textinfo);
Columns = textinfo.screenwidth;
Rows = textinfo.screenheight;
#ifndef DJGPP
if (textinfo.currmode > 10)
Rows = *(char far *)MK_FP(0x40, 0x84) + 1;
#endif
if (Columns < MIN_COLUMNS || Rows < MIN_LINES)
{
/* these values are overwritten by termcap size or default */
Columns = 80;
Rows = 25;
return FAIL;
}
#ifdef DJGPP
mytextinit(&textinfo); /* Added by JML, 1/15/98 */
#endif
return OK;
}
/*
* Set the active window for delline/insline.
*/
static void
set_window(void)
{
if (term_console)
{
#ifndef DJGPP
_video.screenheight = Rows;
#endif
mywindow(1, 1, Columns, Rows);
}
screen_start();
}
void
mch_set_shellsize(void)
{
/* Should try to set the window size to Rows and Columns.
* May involve switching display mode....
* We assume the user knows the size and just use it. */
}
/*
* Rows and/or Columns has changed.
*/
void
mch_new_shellsize()
{
#ifdef FEAT_MOUSE
/* best guess for mouse coordinate computations */
if (Columns <= 40)
mouse_x_div = 16;
if (Rows == 30)
mouse_y_div = 16;
#endif
set_window();
#ifdef FEAT_MOUSE
mouse_area(); /* set area where mouse can go */
#endif
}
#if defined(DJGPP) || defined(PROTO)
/*
* Check the number of Columns with a BIOS call. This avoids a crash of the
* DOS console when 'columns' is set to a too large value.
*/
void
mch_check_columns()
{
static union REGS regs;
regs.h.ah = 0x0f;
(void)int86(0x10, &regs, &regs);
if ((unsigned)Columns > (unsigned)regs.h.ah)
Columns = (unsigned)regs.h.ah;
}
#endif
/*
* call shell, return FAIL for failure, OK otherwise
* options: SHELL_*, see vim.h.
*/
int
mch_call_shell(
char_u *cmd,
int options)
{
int x;
int tmode = cur_tmode;
#ifndef DJGPP
char_u *newcmd;
#endif
out_flush();
#ifdef DJGPP
set_sys_cursor();
#endif
if (options & SHELL_COOKED)
settmode(TMODE_COOK); /* set to normal mode */
set_interrupts(FALSE); /* restore interrupts */
#ifdef DJGPP
/* ignore signals while external command is running */
signal(SIGINT, SIG_IGN);
signal(SIGHUP, SIG_IGN);
signal(SIGQUIT, SIG_IGN);
signal(SIGTERM, SIG_IGN);
#endif
if (cmd == NULL)
x = system((char *)p_sh);
else
{
#ifdef DJGPP
/*
* Use 'shell' for system().
*/
setenv("SHELL", (char *)p_sh, 1);
x = system(cmd);
#else
/* we use "command" to start the shell, slow but easy */
newcmd = alloc(STRLEN(p_sh) + STRLEN(p_shcf) + STRLEN(cmd) + 3);
if (newcmd == NULL)
x = -1;
else
{
sprintf((char *)newcmd, "%s %s %s", p_sh, p_shcf, cmd);
x = system((char *)newcmd);
vim_free(newcmd);
}
#endif
}
#ifdef DJGPP
signal(SIGINT, SIG_DFL);
signal(SIGHUP, SIG_DFL);
signal(SIGQUIT, SIG_DFL);
signal(SIGTERM, SIG_DFL);
#endif
if (tmode == TMODE_RAW)
settmode(TMODE_RAW); /* set to raw mode */
set_interrupts(TRUE); /* catch interrupts */
if (x && !(options & SHELL_SILENT) && !emsg_silent)
{
MSG_PUTS("\nshell returned ");
msg_outnum((long)x);
msg_putchar('\n');
}
return x;
}
/*
* check for an "interrupt signal": CTRL-break or CTRL-C
*/
void
mch_breakcheck(void)
{
if (ctrlc_pressed)
{
ctrlc_pressed = FALSE;
got_int = TRUE;
}
}
/*
* Return TRUE if "p" contain a wildcard that can be expanded by
* dos_expandpath().
*/
int
mch_has_exp_wildcard(char_u *p)
{
for ( ; *p; mb_ptr_adv(p))
{
if (vim_strchr((char_u *)"?*[", *p) != NULL
|| (*p == '~' && p[1] != NUL))
return TRUE;
}
return FALSE;
}
/*
* Return TRUE if "p" contain a wildcard or a "~1" kind of thing (could be a
* shortened file name).
*/
int
mch_has_wildcard(char_u *p)
{
for ( ; *p; mb_ptr_adv(p))
{
if (vim_strchr((char_u *)
# ifdef VIM_BACKTICK
"?*$[`"
# else
"?*$["
# endif
, *p) != NULL
|| (*p == '~' && p[1] != NUL))
return TRUE;
}
return FALSE;
}
/*
* Change directory to "path".
* The normal chdir() does not change the default drive. This one does.
* Return 0 for success, -1 for failure.
*/
int
mch_chdir(char *path)
{
if (path[0] == NUL) /* just checking... */
return 0;
if (p_verbose >= 5)
{
verbose_enter();
smsg((char_u *)"chdir(%s)", path);
verbose_leave();
}
if (path[1] == ':') /* has a drive name */
{
if (change_drive(TOLOWER_ASC(path[0]) - 'a' + 1))
return -1; /* invalid drive name */
path += 2;
}
if (*path == NUL) /* drive name only */
return 0;
return chdir(path); /* let the normal chdir() do the rest */
}
#ifdef DJGPP
/*
* mch_rename() works around a bug in rename (aka MoveFile) in
* Windows 95: rename("foo.bar", "foo.bar~") will generate a
* file whose short file name is "FOO.BAR" (its long file name will
* be correct: "foo.bar~"). Because a file can be accessed by
* either its SFN or its LFN, "foo.bar" has effectively been
* renamed to "foo.bar", which is not at all what was wanted. This
* seems to happen only when renaming files with three-character
* extensions by appending a suffix that does not include ".".
* Windows NT gets it right, however, with an SFN of "FOO~1.BAR".
* This works like mch_rename in os_win32.c, but is a bit simpler.
*
* Like rename(), returns 0 upon success, non-zero upon failure.
* Should probably set errno appropriately when errors occur.
*/
int
mch_rename(const char *OldFile, const char *NewFile)
{
char_u *TempFile;
int retval;
int fd;
/* rename() works correctly without long file names, so use that */
if (!_USE_LFN)
return rename(OldFile, NewFile);
if ((TempFile = alloc((unsigned)(STRLEN(OldFile) + 13))) == NULL)
return -1;
STRCPY(TempFile, OldFile);
STRCPY(gettail(TempFile), "axlqwqhy.ba~");
if (rename(OldFile, TempFile))
retval = -1;
else
{
/* now create an empty file called OldFile; this prevents
* the operating system using OldFile as an alias (SFN)
* if we're renaming within the same directory. For example,
* we're editing a file called filename.asc.txt by its SFN,
* filena~1.txt. If we rename filena~1.txt to filena~1.txt~
* (i.e., we're making a backup while writing it), the SFN
* for filena~1.txt~ will be filena~1.txt, by default, which
* will cause all sorts of problems later in buf_write(). So, we
* create an empty file called filena~1.txt and the system will have
* to find some other SFN for filena~1.txt~, such as filena~2.txt
*/
if ((fd = open(OldFile, O_RDWR|O_CREAT|O_EXCL, 0444)) < 0)
return -1;
retval = rename(TempFile, NewFile);
close(fd);
mch_remove((char_u *)OldFile);
/* If renaming to NewFile failed, rename TempFile back to OldFile, so
* that it looks like nothing happened. */
if (retval)
rename(TempFile, OldFile);
}
vim_free(TempFile);
return retval; /* success */
}
#endif
#if defined(DJGPP) || defined(PROTO)
/*
* setlocale() for DJGPP with MS-DOS codepage support
* Author: Cyril Slobin <slobin@fe.msk.ru>
*
* Scaled down a lot for use by Vim: Only support setlocale(LC_ALL, "").
*/
#undef setlocale
#include <go32.h>
#include <inlines/ctype.ha>
#include <locale.h>
#define UPCASE (__dj_ISALNUM | __dj_ISALPHA | __dj_ISGRAPH | __dj_ISPRINT | __dj_ISUPPER)
#define LOCASE (__dj_ISALNUM | __dj_ISALPHA | __dj_ISGRAPH | __dj_ISPRINT | __dj_ISLOWER)
char *
djgpp_setlocale(void)
{
__dpmi_regs regs;
struct { char id; unsigned short off, seg; } __attribute__ ((packed)) info;
unsigned char buffer[0x82], lower, upper;
int i;
regs.x.ax = 0x6502;
regs.x.bx = 0xffff;
regs.x.dx = 0xffff;
regs.x.cx = 5;
regs.x.es = __tb >> 4;
regs.x.di = __tb & 0xf;
__dpmi_int(0x21, &regs);
if (regs.x.flags & 1)
return NULL;
dosmemget(__tb, 5, &info);
dosmemget((info.seg << 4) + info.off, 0x82, buffer);
if (*(short *)buffer != 0x80)
return NULL;
/* Fix problem of underscores being replaced with y-umlaut. (Levin) */
if (buffer[26] == 0x5f)
buffer[26] = 0x98;
for (i = 0; i < 0x80; i++)
{
lower = i + 0x80;
upper = (buffer+2)[i];
if (lower != upper)
{
__dj_ctype_flags[lower+1] = LOCASE;
__dj_ctype_toupper[lower+1] = upper;
if (__dj_ctype_flags[upper+1] == 0)
__dj_ctype_flags[upper+1] = UPCASE;
if (__dj_ctype_tolower[upper+1] == upper)
__dj_ctype_tolower[upper+1] = lower;
}
}
return "C";
}
#if defined(FEAT_CLIPBOARD) || defined(PROTO)
/*
* Clipboard stuff, for cutting and pasting text to other windows.
*
* Implementation of DOS/Windows clipboard data transfer
* by David Kotchan (dkotchan@sympatico.ca)
*/
#define CF_TEXT 0x01 /* Windows clipboard format: Windows (ANSI) text */
#define CF_OEMTEXT 0x07 /* Windows clipboard format: OEM (DOS) text */
#define CF_VIMCLIP 0x04 /* trick: SYLK clipboard format for VimClipboard */
static int Win16OpenClipboard(void);
static int Win16CloseClipboard(void);
static int Win16EmptyClipboard(void);
static char_u *Win16GetClipboardData(int clip_data_format);
static int Win16SetClipboardData(int clip_data_format, char_u *clip_data, int clip_data_size, int clip_data_type);
/*
* Make vim the owner of the current selection. Return OK upon success.
*/
int
clip_mch_own_selection(VimClipboard *cbd)
{
/*
* Never actually own the clipboard. If another application sets the
* clipboard, we don't want to think that we still own it.
*/
return FAIL;
}
/*
* Make vim NOT the owner of the current selection.
*/
void
clip_mch_lose_selection(VimClipboard *cbd)
{
/* Nothing needs to be done here */
}
/*
* Read the Windows clipboard text and put it in Vim's clipboard register.
*/
void
clip_mch_request_selection(VimClipboard *cbd)
{
int type = MCHAR;
char_u *pAllocated = NULL;
char_u *pClipText = NULL;
int clip_data_format = 0;
if (Win16OpenClipboard())
{
/* Check for Vim's own clipboard format first. The CF_VIMCLIP format
* is just ordinary text (like CF_TEXT) except prepended by the
* selection type (as a single character). Note that under DOS we
* actually cannot define a custom CF_VIMCLIP clipboard format; we
* use instead one of the existing Windows-defined formats, usually
* "DIF" or "SYLK". See Win16GetClipboardData() for details.
*
* Note that Win16GetClipboardData() returns the address of the memory
* block it allocated. This is not necessary the start of the
* clipboard text data: there may be other bytes ahead of the
* text (particularly for CF_VIMCLIP) which are used for data
* management. So pClipText is not necessarily == pAllocated.
*/
if ((pAllocated = Win16GetClipboardData(CF_VIMCLIP)) != NULL)
{
clip_data_format = CF_VIMCLIP;
pClipText = pAllocated;
switch (*pClipText++) /* after ++, pClipText points to text */
{
default:
case 'L': type = MLINE; break;
case 'C': type = MCHAR; break;
#ifdef FEAT_VISUAL
case 'B': type = MBLOCK; break;
#endif
}
}
/* Otherwise, check for the normal Windows text formats. There are
* two of these: CF_TEXT (common) and CF_OEMTEXT (used for DOS
* compatibility). Experiments show that, under the DOS/Windows
* clipboard interface, writing CF_TEXT data to the clipboard
* automatically creates a CF_OEMTEXT format as well.
*/
else if ((pAllocated = Win16GetClipboardData(CF_TEXT)) != NULL)
{
clip_data_format = CF_TEXT;
pClipText = pAllocated;
type = (vim_strchr((char*)pClipText, '\r') != NULL) ? MLINE : MCHAR;
}
else if ((pAllocated = Win16GetClipboardData(CF_OEMTEXT)) != NULL)
{
clip_data_format = CF_OEMTEXT;
pClipText = pAllocated;
type = (vim_strchr((char*)pClipText, '\r') != NULL) ? MLINE : MCHAR;
}
/* Did we get anything? */
if (pClipText != NULL)
{
char_u *pDest;
char_u *pStart;
char_u *pEnd;
long_u clip_data_size = 0;
/* The Windows clipboard normally stores its text lines terminated
* by <CR><NL>. But Vim uses only <NL>, so translate the <CR><NL>
* into <NL>. Also, watch for possible null bytes at the end of
* pClipText. These are padding added by "get_clipboard_data"
* (int 0x2f, AX= 0x1705) in order to round the data size up to the
* next multiple of 32 bytes. See Win16GetClipboardData() for
* details.
*/
pDest = strstr( pClipText, "\r\n" ); /* find first <CR><NL> */
if (pDest != NULL) /* found one? */
{
pStart = pDest + 1; /* points to <NL> after <CR> */
pEnd = strstr( pStart, "\r\n" );/* find next <CR><NL> */
while (pEnd != NULL) /* found one? */
{
memmove(pDest, pStart, (long)(pEnd - pStart));
/* exclude <CR> */
pDest += (long)(pEnd - pStart); /* new destination */
pStart = pEnd + 1; /* new starting point */
pEnd = strstr(pStart, "\r\n"); /* find next <CR><NL> */
}
/* Fell out of while() loop: no more <CR><NL> pairs. Just copy
* the rest of the data, up to the first null byte. */
pEnd = strchr(pStart, '\0'); /* find first null */
memmove(pDest, pStart, (long)(pEnd - pStart)); /* exclude nul */
pDest += (long)(pEnd - pStart);
*pDest = '\0'; /* terminate */
/* Now that all <CR><NL> pairs have been "compressed" into just
* <NL>'s, determine the true text length. */
clip_data_size = (long_u)(pDest - pClipText);
}
else
{
/* no <CR><NL> pairs at all */
/* Since the data may have been padded with trailing nulls,
* determine the true string length. */
clip_data_size = STRLEN(pClipText); /* true data length */
}
/* Copy the cleaned-up data over to Vim's clipboard "*" register. */
clip_yank_selection(type, pClipText, clip_data_size, cbd);
/* Free the memory that Win16GetClipboardData() allocated. */
vim_free(pAllocated);
}
Win16CloseClipboard();
} // end if (Win16OpenClipboard())
}
/*
* Send the currently selected Vim text to the Windows clipboard.
*/
void
clip_mch_set_selection( VimClipboard *cbd )
{
char_u *pClipData = NULL;
long_u clip_data_size;
int clip_data_type;
/* If the '*' register isn't already filled in, fill it in now. */
cbd->owned = TRUE;
clip_get_selection(cbd);
cbd->owned = FALSE;
/*
* clip_convert_selection() returns a pointer to a buffer containing
* the text to send to the Windows clipboard, together with a count
* of the number of characters (bytes) in the buffer. The function's
* return value is the 'type' of selection: MLINE, MCHAR, or MBLOCK;
* or -1 for failure.
*/
clip_data_type = clip_convert_selection(&pClipData, &clip_data_size, cbd);
if (clip_data_type < 0) /* could not convert? */
return; /* early exit */
if (Win16OpenClipboard())
{
if (Win16EmptyClipboard())
{
int sentOK;
sentOK = Win16SetClipboardData(CF_TEXT, pClipData,
clip_data_size, clip_data_type);
sentOK = Win16SetClipboardData(CF_VIMCLIP,
pClipData, clip_data_size, clip_data_type) && sentOK;
if (!sentOK)
{
/* one or both of Win16SetClipboardData() failed. */
/* Technically we don't know why Win16SetClipboardData()
* failed, but almost always it will be because there wasn't
* enough DOS memory to buffer the data, so report that as the
* problem.
*
* We report the error here (instead of in
* Win16SetClipboardData()) because we don't want the error
* reported twice.
*/
EMSG("E450: Selection too large, cannot allocate DOS buffer");
}
}
Win16CloseClipboard();
}
/* release memory allocated by clip_convert_selection() */
vim_free(pClipData);
return;
}
/*
* Win16OpenClipboard: open the Windows clipboard. The clipboard must be open
* before it can be communicated with at all. Return TRUE on success,
* FALSE on failure.
*/
static int
Win16OpenClipboard(void)
{
__dpmi_regs dpmi_regs;
long start_time;
int tick_count;
/* int 02xf, AX = 0x1701 attempts to open the Windows clipboard. Upon
* return from the interrupt, if AX is non-zero, the clipboard was
* successfully opened. If AX is zero, the clipboard could not be opened
* because it is currently in use by another process.
*
* Remark: other DOS programs I (dk) have written that use the Windows
* clipboard sometimes encounter the problem that the clipboard cannot
* be opened even though it is demonstrably not in use by any other
* process. In all cases, repeated attempts to open the clipboard
* eventually succeed, but the initial attempt occasionally fails.
*
* The problem is intermittent and appears to be related to DOS being
* "busy" at certain unpredictable times. DOS maintains two internal
* flags that indicate whether it's busy: InDOS and CritErr. The
* location of InDOS can be found by calling int 0x21, AH = 0x34. The
* location of CritErr can be found by calling int 0x21, AX = 0x5d06.
* If either of these flags is set, DOS is "busy" and cannot be
* interrupted. See "Undocumented DOS" by Schulman et al for details.
*
* However here I take the easier approach that if the first call to open
* the clipboard does not succeed, just try again. In fact, try once per
* biostime() clock tick, up to 18 times (about one second).
*/
tick_count = 0;
dpmi_regs.x.ax = 0x1701; /* open Windows clipboard */
if (__dpmi_int(0x2f, &dpmi_regs) == -1)
{
/* real-mode interrupt failed? */
return FALSE; /* FALSE --> clipboard not open */
}
/* wait up to one second */
while (dpmi_regs.x.ax == 0 && tick_count++ < 18)
{
/* Wait one clock tick (18.2 ticks/sec = 55 msec per tick).
*
* We busy-wait here. Unfortunately, delay() and usleep() have been
* reported to give problems with the original Windows 95. This is
* fixed in service pack 1, but not everybody installed that.
*/
start_time = biostime(0, 0L);
while (biostime(0, 0L) == start_time)
;
dpmi_regs.x.ax = 0x1701; /* open Windows clipboard */
if (__dpmi_int(0x2f, &dpmi_regs) == -1)
{
/* real-mode interrupt failed? */
return FALSE; /* FALSE --> clipboard not open */
}
}
/* Couldn't open the clipboard, even after 18 attempts? */
if (tick_count >= 18 && dpmi_regs.x.ax == 0)
return FALSE; /* FALSE --> clipboard not open */
return TRUE; /* TRUE --> clipboard opened successfully, OK */
}
/*
* Win16CloseClipboard: close the Windows clipboard. Return TRUE on
* success, FALSE on failure. This function can always be called,
* whether the clipboard is open or not.
*/
static int
Win16CloseClipboard(void)
{
__dpmi_regs dpmi_regs;
/* Close the clipboard. This interrupt can always be called, even
* if the clipboard is already closed.
*/
dpmi_regs.x.ax = 0x1708; /* close the clipboard */
if (__dpmi_int(0x2f, &dpmi_regs) == -1)
{
/* real-mode interrupt failed? */
return FALSE; /* FALSE --> clipboard could not be closed */
}
return TRUE; /* TRUE --> clipboard closed successfully, OK */
}
/*
* Win16EmptyClipboard: empty the (previously opened) Windows clipboard.
* Return TRUE on success, FALSE on failure.
*/
static int
Win16EmptyClipboard(void)
{
__dpmi_regs dpmi_regs;
/* int 02xf, AX = 0x1702 attempts to empty the Windows clipboard. Upon
* return from the interrupt, if AX == 0, the clipboard could not be
* emptied (for some reason).
*/
dpmi_regs.x.ax = 0x1702; /* empty the Windows clipboard */
if (__dpmi_int(0x2f, &dpmi_regs) == -1)
{
/* real-mode interrupt failed? */
return FALSE; /* FALSE --> clipboard could not be emptied */
}
/* Did we succeed in clearing the clipboard? */
if (dpmi_regs.x.ax == 0)
return FALSE; /* FALSE --> clipboard could not be emptied */
return TRUE; /* TRUE --> clipboard was emptied, OK */
}
/*
* FreeDOSMemory: a helper function to free memory previously
* allocated by a call to __dpmi_allocate_dos_memory().
*/
static void
FreeDOSMemory(int protected_mode_selector)
{
/* Free the DOS buffer and release the DPMI prot-mode selector.
*
* It's important that DOS memory be properly released because
* there's only a limited amount of it. Therefore, if the call
* to __dpmi_free_dos_memory() fails, emit an error message
* unconditionally.
*/
if (__dpmi_free_dos_memory(protected_mode_selector) == -1)
EMSG("E451: could not free DOS memory buffer (DJGPP)");
}
/*
* Win16GetClipboardData: query the Windows clipboard as to whether data
* is available in a particular clipboard format. If data is
* available, allocate a buffer for it and read the data from the
* clipboard into the buffer. Return a pointer to the buffer. If
* no data is available in the requested format, return NULL.
*
* This routine allocates memory to hold the retrieved clipboard
* data. It's the caller's responsibility to free this memory
* once it's finished using it. The memory should be freed by
* calling vim_free().
*/
static char_u *
Win16GetClipboardData(int clip_data_format)
{
__dpmi_regs dpmi_regs;
int real_mode_segment_address;
int protected_mode_selector;
char_u *clip_data_buffer;
long_u clip_data_size;
/* We only handle clipboard formats we recognize, others are ignored.
*
* It's not possible to create a custom clipboard format for VimClipboard
* data under DOS, so one of the predefined Windows formats had to be
* used for CF_VIMCLIP. Two obscure formats, popular when Windows 3.0
* came out but no longer in much use today, are the DIF and SYLK formats.
* DIF is the Data Interchange Format, SYLK is the Symbolic Link format.
* They are both text formats and either one can be hijacked for use as
* "the VimClipboard format". Of course, this conflicts with anyone who
* still *is* using DIF or SYLK data formats, but that will be very few
* people.
*
* I (dk) chose SYLK as the more obscure format because it was used
* mostly for Microsoft Multiplan (the pre-cursor to Excel) and it's not
* likely Multiplan is used anywhere much anymore. Mind you, Excel can
* still export to both DIF and SYLK formats.
*/
switch (clip_data_format)
{
case CF_VIMCLIP: /* Vim's own special clipboard format */
case CF_TEXT: /* Windows text */
case CF_OEMTEXT: /* DOS (OEM) text */
/* int 02xf, AX = 0x1704 returns the number of bytes of data currently
* on the Windows clipboard, for the specified format. Upon return
* from the interrupt, DX:AX = the number of bytes, rounded up to the
* nearest multiple of 32.
*/
dpmi_regs.x.ax = 0x1704; /* get size of clipbd data */
dpmi_regs.x.dx = clip_data_format;
if (__dpmi_int(0x2f, &dpmi_regs) == -1)
{
/* real-mode interrupt failed? */
return NULL; /* early exit */
}
/* Did we get anything? If not, this is not an error. */
if (dpmi_regs.x.dx == 0 && dpmi_regs.x.ax == 0)
{
/* no CF_VIMCLIP data? */
return NULL; /* early exit */
}
/* There is data available in the requested clipboard format.
*
* Calculate data size. Remember this is rounded up to the nearest
* multiple of 32, so clip_data_size is actually an upper limit.
* The extra bytes, if any, are set to null (0x00) when the data is
* read from the clipboard. (Later:) actually I'm no longer sure
* this is strictly true: the end-of-data is marked by a null, but
* the extra bytes appear to sometimes be null, sometimes not.
* They may just be garbage.
*/
clip_data_size = dpmi_regs.x.ax + (dpmi_regs.x.dx << 16);
/* Allocate memory to retrieve the data. The buffer has to lie in the
* DOS memory region (in the first 1 MByte of address space) because
* the Windows clipboard interface expects a 16-bit segment:offset
* pointer to a buffer address within the DOS region. Must therefore
* use __dpmi_allocate_dos_memory() instead of lalloc() or alloc().
*/
real_mode_segment_address = __dpmi_allocate_dos_memory(
(clip_data_size + 15) >> 4, /* buffer size, in 16-byte paragraphs */
&protected_mode_selector); /* prot-mode selector for the address */
if (real_mode_segment_address == -1)
{
/* memory allocation failed. */
/* Technically we don't know why the allocation failed, but
* almost always it will be because there wasn't enough DOS
* memory to satisfy the request, so report that as the problem.
* On my system, DJGPP is able to satisfy a DOS allocation request
* up to about 600K in size. This depends on your HIMEM.SYS and
* EMM386.EXE settings however.
*/
EMSG("E452: Clipboard data too large, cannot allocate DOS buffer");
return NULL; /* early exit */
}
/* Copy data from the clipboard into the buffer. Experiments show that
* the Windows clipboard is smart enough to handle data transfers
* larger than 64K properly, even though the buffer address is a 16-bit
* segment:offset (which would normally limit the block size to 64K
* unless ES gets incremented).
*/
dpmi_regs.x.ax = 0x1705; /* get clipboard data */
dpmi_regs.x.dx = clip_data_format; /* CF_VIMCLIP */
dpmi_regs.x.es = real_mode_segment_address; /* buffer ad: segment */
dpmi_regs.x.bx = 0; /* buffer ad: offset */
if (__dpmi_int( 0x2f, &dpmi_regs) == -1)
{
/* real-mode interrupt failed? */
EMSG("E453: could not copy clipboard data to DOS buffer");
FreeDOSMemory(protected_mode_selector); /* clean up DOS mem */
return NULL; /* early exit */
}
/* Clipboard data is now in DOS memory in the buffer pointed to by
* ES:BX. Copy this into ordinary memory that Vim can access (ie.
* prot-mode memory). Allocate one extra byte to ensure the text
* is terminated properly (in case it was somehow corrupted).
*/
clip_data_buffer = (char_u *)lalloc(clip_data_size + 1, TRUE);
if (clip_data_buffer == NULL)
{
/* allocation failed? */
EMSG("E454: could not allocate clipboard memory buffer");
FreeDOSMemory(protected_mode_selector); /* clean up DOS mem */
return NULL; /* early exit */
}
*(clip_data_buffer + clip_data_size) = '\0'; /* ensure terminated */
/* Copy the data from DOS memory to Vim-accessible memory. */
movedata( /* DJGPP version of memcpy() */
protected_mode_selector, 0, /* source: DOS ad (via selector) */
_my_ds(), (unsigned)clip_data_buffer,
/* target: normal mem address */
clip_data_size); /* how many bytes */
/* Free the DOS buffer and release the DPMI prot-mode selector. */
FreeDOSMemory(protected_mode_selector); /* clean up DOS memory */
return clip_data_buffer; /* return pointer to allocated buffer */
default: /* unknown clipboard format */
return NULL;
}
}
/*
* Win16SetClipboardData: send 'clip_data_size' bytes of data from the buffer
* pointed to by 'clip_data', to the Windows clipboard. The data is
* registered with the clipboard as being in the 'clip_data_format'
* format.
*/
static int
Win16SetClipboardData(
int clip_data_format,
char_u *clip_data,
int clip_data_size,
int clip_data_type)
{
__dpmi_regs dpmi_regs;
int real_mode_segment_address;
int protected_mode_selector;
long_u protected_mode_offset = 0L;
int total_size = clip_data_size;
char_u *clip_sel_type;
/* If we're using the CF_VIMCLIP custom format, allocate an extra
* byte for clip_sel_type, which is a character indicating the type
* of text selection: MLINE, MCHAR, or MBLOCK.
*/
if (clip_data_format == CF_VIMCLIP)
total_size++; /* extra byte for marker */
/* Data cannot be sent directly from a Vim string (pClipData) to
* the Windows clipboard, because the Windows clipboard interface
* expects a 16-bit (DOS) segment:offset address for the source
* buffer. Therefore we must create a "transfer buffer" in the DOS
* memory region (in the first 1 MByte of address space) and copy
* the Vim string into that. From there, the data can then be sent
* to the Windows clipboard.
*
* To allocate DOS memory, we must use __dpmi_allocate_dos_memory()
* instead of lalloc() or alloc(). If the allocation fails, it will
* almost invariably be because there is not enough DOS memory
* available to accommodate the size of clip_data. There is nothing
* we can do about this, we simply have to fail.
*/
real_mode_segment_address = __dpmi_allocate_dos_memory(
(total_size + 15) >> 4, /* buffer size, in 16-byte paragraphs */
&protected_mode_selector); /* prot-mode selector for the address */
if (real_mode_segment_address == -1)
{
/* memory allocation failed. */
/* Technically we don't know why the allocation failed, but
* almost always it will be because there wasn't enough DOS
* memory to satisfy the request. On my system, DJGPP is able
* to satisfy a DOS allocation request up to about 600K in size.
* This depends however on HIMEM.SYS and EMM386.EXE settings.
*/
return FALSE; /* early exit */
}
/* Copy data from Vim's buffer (clip_data) into the DOS transfer buffer.
* This can be larger than 64K; movedata() takes care of crossing any
* 16-bit segment boundaries.
*
* If we're using Vim's custom clipboard format, we must copy one extra
* byte to indicate the type of selection: line, character, or block.
*/
if (clip_data_format == CF_VIMCLIP)
{
switch (clip_data_type)
{
default:
case MLINE: clip_sel_type = "L"; break;
case MCHAR: clip_sel_type = "C"; break;
#ifdef FEAT_VISUAL
case MBLOCK: clip_sel_type = "B"; break;
#endif
}
movedata(
_my_ds(), (unsigned)clip_sel_type,
/* source: normal memory address */
protected_mode_selector, 0, /* target: DOS ad (via selector) */
1); /* how many bytes to copy */
protected_mode_offset += STRLEN(clip_sel_type); /* allow for marker */
}
movedata(
_my_ds(), (unsigned)clip_data, /* source: normal memory address */
protected_mode_selector, /* target: DOS address (via selector) */
protected_mode_offset, /* non-zero, if using clip_sel_type */
clip_data_size); /* how many bytes to copy */
/* Send data from the DOS transfer buffer to the Windows clipboard.
* int 02xf, AX = 0x1703 sends SI:CX bytes of data from the buffer
* at ES:BX, to the clipboard.
*/
dpmi_regs.x.ax = 0x1703; /* send clipboard data */
dpmi_regs.x.dx = clip_data_format; /* flag: format of the data */
dpmi_regs.x.si = ((total_size >> 16)
& 0x0000ffffL); /* hi word of data size */
dpmi_regs.x.cx = (total_size & 0x0000ffffL);
/* lo word of data size */
dpmi_regs.x.es = real_mode_segment_address; /* buffer address: segment */
dpmi_regs.x.bx = 0; /* buffer address: offset */
if (__dpmi_int(0x2f, &dpmi_regs) == -1)
{
/* real-mode interrupt failed. */
FreeDOSMemory(protected_mode_selector); /* clean up DOS memory */
return FALSE; /* early exit */
}
/* Free the DOS buffer and release the DPMI prot-mode selector. */
FreeDOSMemory(protected_mode_selector); /* clean up DOS memory */
return TRUE; /* TRUE --> data successfully sent to clipboard */
}
#endif /* FEAT_CLIPBOARD */
#endif /* DJGPP */
/*
* End of MS-DOS only code
*/
#endif /* WIN16 */
/* common MS-DOS and Win16 code follows */
static int
vim_chmod(char_u *name)
{
char_u *p;
int f;
int c = 0;
/* chmod() can't handle a file name with a trailing slash, remove it.
* But don't remove it for "/" or "c:/". */
p = name + STRLEN(name);
if (p > name)
--p;
if (p > name && (*p == '\\' || *p == '/') && p[-1] != ':')
{
c = *p; /* remove trailing (back)slash */
*p = NUL;
}
else
p = NULL;
#if defined(__BORLANDC__) && (__BORLANDC__ > 0x410)
/* this also sets the archive bit, supported by Borland C 4.0 and later,
* where __BORLANDC__ is 0x450 (3.1 is 0x410) */
f = _rtl_chmod((char *)name, 0, 0);
#else
f = _chmod((char *)name, 0, 0);
#endif
if (p != NULL)
*p = c; /* put back (back)slash */
return f;
}
/*
* get file permissions for 'name'
* Returns -1 for error.
* Returns FA_attributes defined in dos.h
*/
long
mch_getperm(char_u *name)
{
return (long)vim_chmod(name); /* get file mode */
}
/*
* set file permission for 'name' to 'perm'
*
* return FAIL for failure, OK otherwise
*/
int
mch_setperm(
char_u *name,
long perm)
{
perm |= FA_ARCH; /* file has changed, set archive bit */
#if defined(__BORLANDC__) && (__BORLANDC__ > 0x410)
return (_rtl_chmod((char *)name, 1, (int)perm) == -1 ? FAIL : OK);
#else
return (_chmod((char *)name, 1, (int)perm) == -1 ? FAIL : OK);
#endif
}
/*
* Set hidden flag for "name".
*/
void
mch_hide(char_u *name)
{
/* DOS 6.2 share.exe causes "seek error on file write" errors when making
* the swap file hidden. Thus don't do it. */
}
/*
* return TRUE if "name" is a directory
* return FALSE if "name" is not a directory
* return FALSE for error
*
* beware of a trailing (back)slash
*/
int
mch_isdir(char_u *name)
{
int f;
f = vim_chmod(name);
if (f == -1)
return FALSE; /* file does not exist at all */
if ((f & FA_DIREC) == 0)
return FALSE; /* not a directory */
return TRUE;
}
/*
* Return 1 if "name" can be executed, 0 if not.
* Return -1 if unknown.
*/
int
mch_can_exe(name)
char_u *name;
{
char *p;
p = searchpath(name);
if (p == NULL || mch_isdir(p))
return FALSE;
return TRUE;
}
/*
* Check what "name" is:
* NODE_NORMAL: file or directory (or doesn't exist)
* NODE_WRITABLE: writable device, socket, fifo, etc.
* NODE_OTHER: non-writable things
*/
int
mch_nodetype(char_u *name)
{
if (STRICMP(name, "AUX") == 0
|| STRICMP(name, "CON") == 0
|| STRICMP(name, "CLOCK$") == 0
|| STRICMP(name, "NUL") == 0
|| STRICMP(name, "PRN") == 0
|| ((STRNICMP(name, "COM", 3) == 0
|| STRNICMP(name, "LPT", 3) == 0)
&& VIM_ISDIGIT(name[3])
&& name[4] == NUL))
return NODE_WRITABLE;
/* TODO: NODE_OTHER? */
return NODE_NORMAL;
}
/*
* Get name of current directory into buffer 'buf' of length 'len' bytes.
* Return OK for success, FAIL for failure.
*/
int
mch_dirname(
char_u *buf,
int len)
{
#ifdef DJGPP
if (getcwd((char *)buf, len) == NULL)
return FAIL;
/* turn the '/'s returned by DJGPP into '\'s */
slash_adjust(buf);
return OK;
#else
return (getcwd((char *)buf, len) != NULL ? OK : FAIL);
#endif
}
/*
* this version of remove is not scared by a readonly (backup) file
*
* returns -1 on error, 0 otherwise (just like remove())
*/
int
mch_remove(char_u *name)
{
(void)mch_setperm(name, 0); /* default permissions */
return unlink((char *)name);
}
/*
* Special version of getenv(): Use uppercase name.
*/
char_u *
mch_getenv(char_u *name)
{
int i;
#define MAXENVLEN 50
char_u var_copy[MAXENVLEN + 1];
char_u *p;
char_u *res;
/*
* Take a copy of the argument, and force it to upper case before passing
* to getenv(). On DOS systems, getenv() doesn't like lower-case argument
* (unlike Win32 et al.) If the name is too long to fit in var_copy[]
* allocate memory.
*/
if ((i = STRLEN(name)) > MAXENVLEN)
p = alloc(i + 1);
else
p = var_copy;
if (p == NULL)
p = name; /* out of memory, fall back to unmodified name */
else
{
for (i = 0; name[i] != NUL; ++i)
p[i] = toupper(name[i]);
p[i] = NUL;
}
res = (char_u *)getenv((char *)p);
if (p != var_copy && p != name)
vim_free(p);
return res;
}
/*
* Insert user name in s[len].
*/
int
mch_get_user_name(
char_u *s,
int len)
{
*s = NUL;
return FAIL;
}
/*
* Insert host name is s[len].
*/
void
mch_get_host_name(
char_u *s,
int len)
{
#ifdef DJGPP
vim_strncpy(s, "PC (32 bits Vim)", len - 1);
#else
vim_strncpy(s, "PC (16 bits Vim)", len - 1);
#endif
}
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