Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
diff --git a/drivers/char/selection.c b/drivers/char/selection.c
new file mode 100644
index 0000000..16d630f
--- /dev/null
+++ b/drivers/char/selection.c
@@ -0,0 +1,306 @@
+/*
+ * 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/vt_kern.h>
+#include <linux/consolemap.h>
+#include <linux/selection.h>
+#include <linux/tiocl.h>
+#include <linux/console.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 disallocated */
+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 unsigned char
+sel_pos(int n)
+{
+ return inverse_translate(sel_cons, screen_glyph(sel_cons, n));
+}
+
+/* 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 unsigned char c) {
+ return ( 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;
+}
+
+/* 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;
+
+ 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;
+ }
+
+ 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 ... */
+ bp = kmalloc((sel_end-sel_start)/2+1, GFP_KERNEL);
+ if (!bp) {
+ printk(KERN_WARNING "selection: kmalloc() failed\n");
+ clear_selection();
+ return -ENOMEM;
+ }
+ if (sel_buffer)
+ kfree(sel_buffer);
+ sel_buffer = bp;
+
+ obp = bp;
+ for (i = sel_start; i <= sel_end; i += 2) {
+ *bp = sel_pos(i);
+ if (!isspace(*bp++))
+ 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 = (struct vc_data *)tty->driver_data;
+ int pasted = 0, count;
+ struct tty_ldisc *ld;
+ DECLARE_WAITQUEUE(wait, current);
+
+ acquire_console_sem();
+ poke_blanked_console();
+ release_console_sem();
+
+ ld = tty_ldisc_ref_wait(tty);
+
+ 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->ldisc.receive_room(tty));
+ tty->ldisc.receive_buf(tty, sel_buffer + pasted, NULL, count);
+ pasted += count;
+ }
+ remove_wait_queue(&vc->paste_wait, &wait);
+ current->state = TASK_RUNNING;
+
+ tty_ldisc_deref(ld);
+ return 0;
+}