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authorJan Engelhardt <jengelh@linux01.gwdg.de>2007-07-15 23:40:40 -0700
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2007-07-16 09:05:46 -0700
commit759448f459234bfcf34b82471f0dba77a9aca498 (patch)
tree61cbf8501bdad78c03e034072791fbf3e0436d43 /drivers/char/consolemap.c
parentaa0ac36518be648dda3a32f0b37a8b2b546e1b24 (diff)
Kernel utf-8 handling
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>
Diffstat (limited to 'drivers/char/consolemap.c')
-rw-r--r--drivers/char/consolemap.c78
1 files changed, 72 insertions, 6 deletions
diff --git a/drivers/char/consolemap.c b/drivers/char/consolemap.c
index fd40b959afdd..4b3916f54909 100644
--- a/drivers/char/consolemap.c
+++ b/drivers/char/consolemap.c
@@ -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)
{