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authorGreg Kroah-Hartman <gregkh@suse.de>2010-11-04 12:50:47 -0700
committerGreg Kroah-Hartman <gregkh@suse.de>2010-11-05 08:16:52 -0700
commit60d4ae8d436b8be6a8aedb63440203d5395e9f53 (patch)
tree2e0798d278100518634b999dc6705e9f02027d9f /drivers/char/selection.c
parent96fd7ce58ffb5c7bf376796b5525ba3ea1c9d69f (diff)
TTY: create drivers/tty/vt and move the vt code there
The vt and other related code is moved into the drivers/tty/vt directory. Acked-by: Arnd Bergmann <arnd@arndb.de> Cc: Jiri Slaby <jslaby@suse.cz> Cc: Alan Cox <alan@lxorguk.ukuu.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/char/selection.c')
-rw-r--r--drivers/char/selection.c348
1 files changed, 0 insertions, 348 deletions
diff --git a/drivers/char/selection.c b/drivers/char/selection.c
deleted file mode 100644
index ebae344ce910..000000000000
--- a/drivers/char/selection.c
+++ /dev/null
@@ -1,348 +0,0 @@
-/*
- * linux/drivers/char/selection.c
- *
- * This module exports the functions:
- *
- * 'int set_selection(struct tiocl_selection __user *, struct tty_struct *)'
- * 'void clear_selection(void)'
- * 'int paste_selection(struct tty_struct *)'
- * 'int sel_loadlut(char __user *)'
- *
- * Now that /dev/vcs exists, most of this can disappear again.
- */
-
-#include <linux/module.h>
-#include <linux/tty.h>
-#include <linux/sched.h>
-#include <linux/mm.h>
-#include <linux/slab.h>
-#include <linux/types.h>
-
-#include <asm/uaccess.h>
-
-#include <linux/kbd_kern.h>
-#include <linux/vt_kern.h>
-#include <linux/consolemap.h>
-#include <linux/selection.h>
-#include <linux/tiocl.h>
-#include <linux/console.h>
-#include <linux/smp_lock.h>
-
-/* Don't take this from <ctype.h>: 011-015 on the screen aren't spaces */
-#define isspace(c) ((c) == ' ')
-
-extern void poke_blanked_console(void);
-
-/* Variables for selection control. */
-/* Use a dynamic buffer, instead of static (Dec 1994) */
-struct vc_data *sel_cons; /* must not be deallocated */
-static int use_unicode;
-static volatile int sel_start = -1; /* cleared by clear_selection */
-static int sel_end;
-static int sel_buffer_lth;
-static char *sel_buffer;
-
-/* clear_selection, highlight and highlight_pointer can be called
- from interrupt (via scrollback/front) */
-
-/* set reverse video on characters s-e of console with selection. */
-static inline void highlight(const int s, const int e)
-{
- invert_screen(sel_cons, s, e-s+2, 1);
-}
-
-/* use complementary color to show the pointer */
-static inline void highlight_pointer(const int where)
-{
- complement_pos(sel_cons, where);
-}
-
-static u16
-sel_pos(int n)
-{
- return inverse_translate(sel_cons, screen_glyph(sel_cons, n),
- use_unicode);
-}
-
-/* remove the current selection highlight, if any,
- from the console holding the selection. */
-void
-clear_selection(void) {
- highlight_pointer(-1); /* hide the pointer */
- if (sel_start != -1) {
- highlight(sel_start, sel_end);
- sel_start = -1;
- }
-}
-
-/*
- * User settable table: what characters are to be considered alphabetic?
- * 256 bits
- */
-static u32 inwordLut[8]={
- 0x00000000, /* control chars */
- 0x03FF0000, /* digits */
- 0x87FFFFFE, /* uppercase and '_' */
- 0x07FFFFFE, /* lowercase */
- 0x00000000,
- 0x00000000,
- 0xFF7FFFFF, /* latin-1 accented letters, not multiplication sign */
- 0xFF7FFFFF /* latin-1 accented letters, not division sign */
-};
-
-static inline int inword(const u16 c) {
- return c > 0xff || (( inwordLut[c>>5] >> (c & 0x1F) ) & 1);
-}
-
-/* set inwordLut contents. Invoked by ioctl(). */
-int sel_loadlut(char __user *p)
-{
- return copy_from_user(inwordLut, (u32 __user *)(p+4), 32) ? -EFAULT : 0;
-}
-
-/* does screen address p correspond to character at LH/RH edge of screen? */
-static inline int atedge(const int p, int size_row)
-{
- return (!(p % size_row) || !((p + 2) % size_row));
-}
-
-/* constrain v such that v <= u */
-static inline unsigned short limit(const unsigned short v, const unsigned short u)
-{
- return (v > u) ? u : v;
-}
-
-/* stores the char in UTF8 and returns the number of bytes used (1-3) */
-static int store_utf8(u16 c, char *p)
-{
- if (c < 0x80) {
- /* 0******* */
- p[0] = c;
- return 1;
- } else if (c < 0x800) {
- /* 110***** 10****** */
- p[0] = 0xc0 | (c >> 6);
- p[1] = 0x80 | (c & 0x3f);
- return 2;
- } else {
- /* 1110**** 10****** 10****** */
- p[0] = 0xe0 | (c >> 12);
- p[1] = 0x80 | ((c >> 6) & 0x3f);
- p[2] = 0x80 | (c & 0x3f);
- return 3;
- }
-}
-
-/* set the current selection. Invoked by ioctl() or by kernel code. */
-int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *tty)
-{
- struct vc_data *vc = vc_cons[fg_console].d;
- int sel_mode, new_sel_start, new_sel_end, spc;
- char *bp, *obp;
- int i, ps, pe, multiplier;
- u16 c;
- struct kbd_struct *kbd = kbd_table + fg_console;
-
- poke_blanked_console();
-
- { unsigned short xs, ys, xe, ye;
-
- if (!access_ok(VERIFY_READ, sel, sizeof(*sel)))
- return -EFAULT;
- __get_user(xs, &sel->xs);
- __get_user(ys, &sel->ys);
- __get_user(xe, &sel->xe);
- __get_user(ye, &sel->ye);
- __get_user(sel_mode, &sel->sel_mode);
- xs--; ys--; xe--; ye--;
- xs = limit(xs, vc->vc_cols - 1);
- ys = limit(ys, vc->vc_rows - 1);
- xe = limit(xe, vc->vc_cols - 1);
- ye = limit(ye, vc->vc_rows - 1);
- ps = ys * vc->vc_size_row + (xs << 1);
- pe = ye * vc->vc_size_row + (xe << 1);
-
- if (sel_mode == TIOCL_SELCLEAR) {
- /* useful for screendump without selection highlights */
- clear_selection();
- return 0;
- }
-
- if (mouse_reporting() && (sel_mode & TIOCL_SELMOUSEREPORT)) {
- mouse_report(tty, sel_mode & TIOCL_SELBUTTONMASK, xs, ys);
- return 0;
- }
- }
-
- if (ps > pe) /* make sel_start <= sel_end */
- {
- int tmp = ps;
- ps = pe;
- pe = tmp;
- }
-
- if (sel_cons != vc_cons[fg_console].d) {
- clear_selection();
- sel_cons = vc_cons[fg_console].d;
- }
- use_unicode = kbd && kbd->kbdmode == VC_UNICODE;
-
- switch (sel_mode)
- {
- case TIOCL_SELCHAR: /* character-by-character selection */
- new_sel_start = ps;
- new_sel_end = pe;
- break;
- case TIOCL_SELWORD: /* word-by-word selection */
- spc = isspace(sel_pos(ps));
- for (new_sel_start = ps; ; ps -= 2)
- {
- if ((spc && !isspace(sel_pos(ps))) ||
- (!spc && !inword(sel_pos(ps))))
- break;
- new_sel_start = ps;
- if (!(ps % vc->vc_size_row))
- break;
- }
- spc = isspace(sel_pos(pe));
- for (new_sel_end = pe; ; pe += 2)
- {
- if ((spc && !isspace(sel_pos(pe))) ||
- (!spc && !inword(sel_pos(pe))))
- break;
- new_sel_end = pe;
- if (!((pe + 2) % vc->vc_size_row))
- break;
- }
- break;
- case TIOCL_SELLINE: /* line-by-line selection */
- new_sel_start = ps - ps % vc->vc_size_row;
- new_sel_end = pe + vc->vc_size_row
- - pe % vc->vc_size_row - 2;
- break;
- case TIOCL_SELPOINTER:
- highlight_pointer(pe);
- return 0;
- default:
- return -EINVAL;
- }
-
- /* remove the pointer */
- highlight_pointer(-1);
-
- /* select to end of line if on trailing space */
- if (new_sel_end > new_sel_start &&
- !atedge(new_sel_end, vc->vc_size_row) &&
- isspace(sel_pos(new_sel_end))) {
- for (pe = new_sel_end + 2; ; pe += 2)
- if (!isspace(sel_pos(pe)) ||
- atedge(pe, vc->vc_size_row))
- break;
- if (isspace(sel_pos(pe)))
- new_sel_end = pe;
- }
- if (sel_start == -1) /* no current selection */
- highlight(new_sel_start, new_sel_end);
- else if (new_sel_start == sel_start)
- {
- if (new_sel_end == sel_end) /* no action required */
- return 0;
- else if (new_sel_end > sel_end) /* extend to right */
- highlight(sel_end + 2, new_sel_end);
- else /* contract from right */
- highlight(new_sel_end + 2, sel_end);
- }
- else if (new_sel_end == sel_end)
- {
- if (new_sel_start < sel_start) /* extend to left */
- highlight(new_sel_start, sel_start - 2);
- else /* contract from left */
- highlight(sel_start, new_sel_start - 2);
- }
- else /* some other case; start selection from scratch */
- {
- clear_selection();
- highlight(new_sel_start, new_sel_end);
- }
- sel_start = new_sel_start;
- sel_end = new_sel_end;
-
- /* Allocate a new buffer before freeing the old one ... */
- multiplier = use_unicode ? 3 : 1; /* chars can take up to 3 bytes */
- bp = kmalloc(((sel_end-sel_start)/2+1)*multiplier, GFP_KERNEL);
- if (!bp) {
- printk(KERN_WARNING "selection: kmalloc() failed\n");
- clear_selection();
- return -ENOMEM;
- }
- kfree(sel_buffer);
- sel_buffer = bp;
-
- obp = bp;
- for (i = sel_start; i <= sel_end; i += 2) {
- c = sel_pos(i);
- if (use_unicode)
- bp += store_utf8(c, bp);
- else
- *bp++ = c;
- if (!isspace(c))
- obp = bp;
- if (! ((i + 2) % vc->vc_size_row)) {
- /* strip trailing blanks from line and add newline,
- unless non-space at end of line. */
- if (obp != bp) {
- bp = obp;
- *bp++ = '\r';
- }
- obp = bp;
- }
- }
- sel_buffer_lth = bp - sel_buffer;
- return 0;
-}
-
-/* Insert the contents of the selection buffer into the
- * queue of the tty associated with the current console.
- * Invoked by ioctl().
- */
-int paste_selection(struct tty_struct *tty)
-{
- struct vc_data *vc = tty->driver_data;
- int pasted = 0;
- unsigned int count;
- struct tty_ldisc *ld;
- DECLARE_WAITQUEUE(wait, current);
-
- /* always called with BTM from vt_ioctl */
- WARN_ON(!tty_locked());
-
- acquire_console_sem();
- poke_blanked_console();
- release_console_sem();
-
- ld = tty_ldisc_ref(tty);
- if (!ld) {
- tty_unlock();
- ld = tty_ldisc_ref_wait(tty);
- tty_lock();
- }
-
- add_wait_queue(&vc->paste_wait, &wait);
- while (sel_buffer && sel_buffer_lth > pasted) {
- set_current_state(TASK_INTERRUPTIBLE);
- if (test_bit(TTY_THROTTLED, &tty->flags)) {
- schedule();
- continue;
- }
- count = sel_buffer_lth - pasted;
- count = min(count, tty->receive_room);
- tty->ldisc->ops->receive_buf(tty, sel_buffer + pasted,
- NULL, count);
- pasted += count;
- }
- remove_wait_queue(&vc->paste_wait, &wait);
- __set_current_state(TASK_RUNNING);
-
- tty_ldisc_deref(ld);
- return 0;
-}