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Kernel utf-8 handling

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This patch fixes dead keys and copy/paste of non-ASCII characters in UTF-8
mode on Linux console.  See more details about the original patch at:
http://chris.heathens.co.nz/linux/utf8.html

Already posted on
	(Oldest) http://lkml.org/lkml/2003/5/31/148
	         http://lkml.org/lkml/2005/12/24/69
	(Recent) http://lkml.org/lkml/2006/8/7/75

[bunk@stusta.de: make drivers/char/selection.c:store_utf8() static]
Signed-off-by: Jan Engelhardt <jengelh@gmx.de>
Cc: Alexander E. Patrakov <patrakov@ums.usu.ru>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: "Antonino A. Daplas" <adaplas@pol.net>
Signed-off-by: Adrian Bunk <bunk@stusta.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Jan Engelhardt 2007-07-15 23:40:40 -07:00 committed by Linus Torvalds
parent aa0ac36518
commit 759448f459
4 changed files with 134 additions and 23 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

78
drivers/char/consolemap.c
View File

@ -177,6 +177,7 @@ struct uni_pagedir {
unsigned long refcount;
unsigned long sum;
unsigned char *inverse_translations[4];
u16 *inverse_trans_unicode;
int readonly;
};
@ -207,6 +208,41 @@ static void set_inverse_transl(struct vc_data *conp, struct uni_pagedir *p, int
}
}
static void set_inverse_trans_unicode(struct vc_data *conp,
struct uni_pagedir *p)
{
int i, j, k, glyph;
u16 **p1, *p2;
u16 *q;
if (!p) return;
q = p->inverse_trans_unicode;
if (!q) {
q = p->inverse_trans_unicode =
kmalloc(MAX_GLYPH * sizeof(u16), GFP_KERNEL);
if (!q)
return;
}
memset(q, 0, MAX_GLYPH * sizeof(u16));
for (i = 0; i < 32; i++) {
p1 = p->uni_pgdir[i];
if (!p1)
continue;
for (j = 0; j < 32; j++) {
p2 = p1[j];
if (!p2)
continue;
for (k = 0; k < 64; k++) {
glyph = p2[k];
if (glyph >= 0 && glyph < MAX_GLYPH
&& q[glyph] < 32)
q[glyph] = (i << 11) + (j << 6) + k;
}
}
}
}
unsigned short *set_translate(int m, struct vc_data *vc)
{
inv_translate[vc->vc_num] = m;
@ -217,19 +253,29 @@ unsigned short *set_translate(int m, struct vc_data *vc)
* Inverse translation is impossible for several reasons:
* 1. The font<->character maps are not 1-1.
* 2. The text may have been written while a different translation map
* was active, or using Unicode.
* was active.
* Still, it is now possible to a certain extent to cut and paste non-ASCII.
*/
unsigned char inverse_translate(struct vc_data *conp, int glyph)
u16 inverse_translate(struct vc_data *conp, int glyph, int use_unicode)
{
struct uni_pagedir *p;
int m;
if (glyph < 0 || glyph >= MAX_GLYPH)
return 0;
else if (!(p = (struct uni_pagedir *)*conp->vc_uni_pagedir_loc) ||
!p->inverse_translations[inv_translate[conp->vc_num]])
else if (!(p = (struct uni_pagedir *)*conp->vc_uni_pagedir_loc))
return glyph;
else
return p->inverse_translations[inv_translate[conp->vc_num]][glyph];
else if (use_unicode) {
if (!p->inverse_trans_unicode)
return glyph;
else
return p->inverse_trans_unicode[glyph];
} else {
m = inv_translate[conp->vc_num];
if (!p->inverse_translations[m])
return glyph;
else
return p->inverse_translations[m][glyph];
}
}
static void update_user_maps(void)
@ -243,6 +289,7 @@ static void update_user_maps(void)
p = (struct uni_pagedir *)*vc_cons[i].d->vc_uni_pagedir_loc;
if (p && p != q) {
set_inverse_transl(vc_cons[i].d, p, USER_MAP);
set_inverse_trans_unicode(vc_cons[i].d, p);
q = p;
}
}
@ -353,6 +400,10 @@ static void con_release_unimap(struct uni_pagedir *p)
kfree(p->inverse_translations[i]);
p->inverse_translations[i] = NULL;
}
if (p->inverse_trans_unicode) {
kfree(p->inverse_trans_unicode);
p->inverse_trans_unicode = NULL;
}
}
void con_free_unimap(struct vc_data *vc)
@ -511,6 +562,7 @@ int con_set_unimap(struct vc_data *vc, ushort ct, struct unipair __user *list)
for (i = 0; i <= 3; i++)
set_inverse_transl(vc, p, i); /* Update all inverse translations */
set_inverse_trans_unicode(vc, p);
return err;
}
@ -561,6 +613,7 @@ int con_set_default_unimap(struct vc_data *vc)
for (i = 0; i <= 3; i++)
set_inverse_transl(vc, p, i); /* Update all inverse translations */
set_inverse_trans_unicode(vc, p);
dflt = p;
return err;
}
@ -617,6 +670,19 @@ void con_protect_unimap(struct vc_data *vc, int rdonly)
p->readonly = rdonly;
}
/* may be called during an interrupt */
u32 conv_8bit_to_uni(unsigned char c)
{
/*
* Always use USER_MAP. This function is used by the keyboard,
* which shouldn't be affected by G0/G1 switching, etc.
* If the user map still contains default values, i.e. the
* direct-to-font mapping, then assume user is using Latin1.
*/
unsigned short uni = translations[USER_MAP][c];
return uni == (0xf000 | c) ? c : uni;
}
int
conv_uni_to_pc(struct vc_data *conp, long ucs)
{

26
drivers/char/keyboard.c
View File

@ -24,6 +24,7 @@
* 21-08-02: Converted to input API, major cleanup. (Vojtech Pavlik)
*/
#include <linux/consolemap.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/tty.h>
@ -308,10 +309,9 @@ static void applkey(struct vc_data *vc, int key, char mode)
* Many other routines do put_queue, but I think either
* they produce ASCII, or they produce some user-assigned
* string, and in both cases we might assume that it is
* in utf-8 already. UTF-8 is defined for words of up to 31 bits,
* but we need only 16 bits here
* in utf-8 already.
*/
static void to_utf8(struct vc_data *vc, ushort c)
static void to_utf8(struct vc_data *vc, uint c)
{
if (c < 0x80)
/* 0******* */
@ -320,11 +320,21 @@ static void to_utf8(struct vc_data *vc, ushort c)
/* 110***** 10****** */
put_queue(vc, 0xc0 | (c >> 6));
put_queue(vc, 0x80 | (c & 0x3f));
} else {
} else if (c < 0x10000) {
if (c >= 0xD800 && c < 0xE000)
return;
if (c == 0xFFFF)
return;
/* 1110**** 10****** 10****** */
put_queue(vc, 0xe0 | (c >> 12));
put_queue(vc, 0x80 | ((c >> 6) & 0x3f));
put_queue(vc, 0x80 | (c & 0x3f));
} else if (c < 0x110000) {
/* 11110*** 10****** 10****** 10****** */
put_queue(vc, 0xf0 | (c >> 18));
put_queue(vc, 0x80 | ((c >> 12) & 0x3f));
put_queue(vc, 0x80 | ((c >> 6) & 0x3f));
put_queue(vc, 0x80 | (c & 0x3f));
}
}
@ -393,7 +403,7 @@ static unsigned int handle_diacr(struct vc_data *vc, unsigned int ch)
return d;
if (kbd->kbdmode == VC_UNICODE)
to_utf8(vc, d);
to_utf8(vc, conv_8bit_to_uni(d));
else if (d < 0x100)
put_queue(vc, d);
@ -407,7 +417,7 @@ static void fn_enter(struct vc_data *vc)
{
if (diacr) {
if (kbd->kbdmode == VC_UNICODE)
to_utf8(vc, diacr);
to_utf8(vc, conv_8bit_to_uni(diacr));
else if (diacr < 0x100)
put_queue(vc, diacr);
diacr = 0;
@ -617,7 +627,7 @@ static void k_unicode(struct vc_data *vc, unsigned int value, char up_flag)
return;
}
if (kbd->kbdmode == VC_UNICODE)
to_utf8(vc, value);
to_utf8(vc, conv_8bit_to_uni(value));
else if (value < 0x100)
put_queue(vc, value);
}
@ -775,7 +785,7 @@ static void k_shift(struct vc_data *vc, unsigned char value, char up_flag)
/* kludge */
if (up_flag && shift_state != old_state && npadch != -1) {
if (kbd->kbdmode == VC_UNICODE)
to_utf8(vc, npadch & 0xffff);
to_utf8(vc, npadch);
else
put_queue(vc, npadch & 0xff);
npadch = -1;

48
drivers/char/selection.c
View File

@ -20,6 +20,7 @@
#include <asm/uaccess.h>
#include <linux/kbd_kern.h>
#include <linux/vt_kern.h>
#include <linux/consolemap.h>
#include <linux/selection.h>
@ -34,6 +35,7 @@ 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;
@ -54,10 +56,11 @@ static inline void highlight_pointer(const int where)
complement_pos(sel_cons, where);
}
static unsigned char
static u16
sel_pos(int n)
{
return inverse_translate(sel_cons, screen_glyph(sel_cons, n));
return inverse_translate(sel_cons, screen_glyph(sel_cons, n),
use_unicode);
}
/* remove the current selection highlight, if any,
@ -86,8 +89,8 @@ static u32 inwordLut[8]={
0xFF7FFFFF /* latin-1 accented letters, not division sign */
};
static inline int inword(const unsigned char c) {
return ( inwordLut[c>>5] >> (c & 0x1F) ) & 1;
static inline int inword(const u16 c) {
return c > 0xff || (( inwordLut[c>>5] >> (c & 0x1F) ) & 1);
}
/* set inwordLut contents. Invoked by ioctl(). */
@ -108,13 +111,36 @@ static inline unsigned short limit(const unsigned short v, const unsigned short
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;
int i, ps, pe, multiplier;
u16 c;
struct kbd_struct *kbd = kbd_table + fg_console;
poke_blanked_console();
@ -158,6 +184,7 @@ int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *t
clear_selection();
sel_cons = vc_cons[fg_console].d;
}
use_unicode = kbd && kbd->kbdmode == VC_UNICODE;
switch (sel_mode)
{
@ -240,7 +267,8 @@ int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *t
sel_end = new_sel_end;
/* Allocate a new buffer before freeing the old one ... */
bp = kmalloc((sel_end-sel_start)/2+1, GFP_KERNEL);
multiplier = use_unicode ? 3 : 1; /* chars can take up to 3 bytes */
bp = kmalloc((sel_end-sel_start)/2*multiplier+1, GFP_KERNEL);
if (!bp) {
printk(KERN_WARNING "selection: kmalloc() failed\n");
clear_selection();
@ -251,8 +279,12 @@ int set_selection(const struct tiocl_selection __user *sel, struct tty_struct *t
obp = bp;
for (i = sel_start; i <= sel_end; i += 2) {
*bp = sel_pos(i);
if (!isspace(*bp++))
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,

5
include/linux/consolemap.h
View File

@ -8,9 +8,12 @@
#define IBMPC_MAP 2
#define USER_MAP 3
#include <linux/types.h>
struct vc_data;
extern unsigned char inverse_translate(struct vc_data *conp, int glyph);
extern u16 inverse_translate(struct vc_data *conp, int glyph, int use_unicode);
extern unsigned short *set_translate(int m, struct vc_data *vc);
extern int conv_uni_to_pc(struct vc_data *conp, long ucs);
extern u32 conv_8bit_to_uni(unsigned char c);
void console_map_init(void);