[PATCH 0/2] fs/nls: Add Arabic code pages CP720 and CP1256

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* [PATCH 0/2] fs/nls: Add Arabic code pages CP720 and CP1256
@ 2026-11-08 20:01 Fuad Tabba
  2026-11-08 20:01 ` [PATCH 1/2] fs/nls: Add codepage 720 (Arabic) Fuad Tabba
  2026-11-08 20:01 ` [PATCH 2/2] fs/nls: Add Windows codepage 1256 (Arabic) Fuad Tabba
  0 siblings, 2 replies; 6+ messages in thread
From: Fuad Tabba @ 2026-11-08 20:01 UTC (permalink / raw)
  To: brauner, viro; +Cc: hirofumi, linux-fsdevel, linux-kernel, fuad.tabba

Hi folks,

This series adds two Arabic code pages that fs/nls lacks. CP720 is the
OEM code page of Arabic Windows, which FAT uses for short names, and
CP1256 is the Windows code page for Arabic. The tables are generated by
a script from Microsoft's code page 720 table (ICU's windows-720-2000)
and the Unicode Organization's CP1256 table, in the layout of the
existing ones.

Based on Linux 7.4-rc1 (6628e7d4c6b25).

Cheers,
/fuad

Fuad Tabba (2):
  fs/nls: Add codepage 720 (Arabic)
  fs/nls: Add Windows codepage 1256 (Arabic)

 fs/nls/Kconfig      |  34 +++-
 fs/nls/Makefile     |   2 +
 fs/nls/nls_cp1256.c | 378 ++++++++++++++++++++++++++++++++++++++++++++
 fs/nls/nls_cp720.c  | 335 +++++++++++++++++++++++++++++++++++++++
 4 files changed, 744 insertions(+), 5 deletions(-)
 create mode 100644 fs/nls/nls_cp1256.c
 create mode 100644 fs/nls/nls_cp720.c

-- 
2.47.3


^ permalink raw reply	[flat|nested] 6+ messages in thread

* [PATCH 1/2] fs/nls: Add codepage 720 (Arabic)
  2026-11-08 20:01 [PATCH 0/2] fs/nls: Add Arabic code pages CP720 and CP1256 Fuad Tabba
@ 2026-11-08 20:01 ` Fuad Tabba
  2026-11-09 12:51   ` OGAWA Hirofumi
  2026-11-08 20:01 ` [PATCH 2/2] fs/nls: Add Windows codepage 1256 (Arabic) Fuad Tabba
  1 sibling, 1 reply; 6+ messages in thread
From: Fuad Tabba @ 2026-11-08 20:01 UTC (permalink / raw)
  To: brauner, viro; +Cc: hirofumi, linux-fsdevel, linux-kernel, fuad.tabba

FAT stores short names in the OEM code page of the system that wrote
them, and the OEM code page of Arabic Windows is 720. The kernel's only
DOS code page for Arabic is cp864, so mounting such a volume with
codepage=720 fails with "codepage cp720 not found".

Add nls_cp720 behind NLS_CODEPAGE_720, with tables generated by a
script from Microsoft's code page 720 table, as ICU's windows-720-2000
mapping carries it. That table maps 0x80, 0x81, 0x84, 0x86 and
0x8d-0x90 to C1 controls, and those eight bytes are left unassigned, as
ICU's ibm-720 mapping leaves them.

Signed-off-by: Fuad Tabba <fuad.tabba@linux.dev>
---
 fs/nls/Kconfig     |  18 ++-
 fs/nls/Makefile    |   1 +
 fs/nls/nls_cp720.c | 335 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 351 insertions(+), 3 deletions(-)
 create mode 100644 fs/nls/nls_cp720.c

diff --git a/fs/nls/Kconfig b/fs/nls/Kconfig
index 2a601af6f3bd5..a19ef628f779e 100644
--- a/fs/nls/Kconfig
+++ b/fs/nls/Kconfig
@@ -26,9 +26,9 @@ config NLS_DEFAULT
 	  the NLS used by your console, not the NLS used by a specific file
 	  system (if different) to store data (filenames) on a disk.
 	  Currently, the valid values are:
-	  big5, cp437, cp737, cp775, cp850, cp852, cp855, cp857, cp860, cp861,
-	  cp862, cp863, cp864, cp865, cp866, cp869, cp874, cp932, cp936,
-	  cp949, cp950, cp1251, cp1255, euc-jp, euc-kr, gb2312, iso8859-1,
+	  big5, cp437, cp720, cp737, cp775, cp850, cp852, cp855, cp857, cp860,
+	  cp861, cp862, cp863, cp864, cp865, cp866, cp869, cp874, cp932,
+	  cp936, cp949, cp950, cp1251, cp1255, euc-jp, euc-kr, gb2312, iso8859-1,
 	  iso8859-2, iso8859-3, iso8859-4, iso8859-5, iso8859-6, iso8859-7,
 	  iso8859-8, iso8859-9, iso8859-13, iso8859-14, iso8859-15,
 	  koi8-r, koi8-ru, koi8-u, sjis, tis-620, macroman, utf8.
@@ -49,6 +49,18 @@ config NLS_CODEPAGE_437
 	  say Y here if you want to include the DOS codepage that is used in
 	  the United States and parts of Canada. This is recommended.
 
+config NLS_CODEPAGE_720
+	tristate "Codepage 720 (Arabic)"
+	help
+	  The Microsoft FAT file system family can deal with filenames in
+	  native language character sets. These character sets are stored in
+	  so-called DOS codepages. You need to include the appropriate
+	  codepage if you want to be able to read/write these filenames on
+	  DOS/Windows partitions correctly. This does apply to the filenames
+	  only, not to the file contents. You can include several codepages;
+	  say Y here if you want to include the DOS codepage for Arabic used
+	  by Windows (OEM 720). If unsure, say N.
+
 config NLS_CODEPAGE_737
 	tristate "Codepage 737 (Greek)"
 	help
diff --git a/fs/nls/Makefile b/fs/nls/Makefile
index 5062c699d0411..2a9a847083592 100644
--- a/fs/nls/Makefile
+++ b/fs/nls/Makefile
@@ -6,6 +6,7 @@
 obj-$(CONFIG_NLS)		+= nls_base.o
 
 obj-$(CONFIG_NLS_CODEPAGE_437)	+= nls_cp437.o
+obj-$(CONFIG_NLS_CODEPAGE_720)	+= nls_cp720.o
 obj-$(CONFIG_NLS_CODEPAGE_737)	+= nls_cp737.o
 obj-$(CONFIG_NLS_CODEPAGE_775)	+= nls_cp775.o
 obj-$(CONFIG_NLS_CODEPAGE_850)	+= nls_cp850.o
diff --git a/fs/nls/nls_cp720.c b/fs/nls/nls_cp720.c
new file mode 100644
index 0000000000000..bb57c61792d5f
--- /dev/null
+++ b/fs/nls/nls_cp720.c
@@ -0,0 +1,335 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/*
+ * Charset cp720 translation tables.
+ * Generated from Microsoft's code page 720 table (ICU windows-720-2000),
+ * with the eight bytes it maps to C1 controls left unassigned.
+ * The Unicode to charset table has only exact mappings.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/nls.h>
+#include <linux/errno.h>
+
+static const wchar_t charset2uni[256] = {
+	/* 0x00*/
+	0x0000, 0x0001, 0x0002, 0x0003,
+	0x0004, 0x0005, 0x0006, 0x0007,
+	0x0008, 0x0009, 0x000a, 0x000b,
+	0x000c, 0x000d, 0x000e, 0x000f,
+	/* 0x10*/
+	0x0010, 0x0011, 0x0012, 0x0013,
+	0x0014, 0x0015, 0x0016, 0x0017,
+	0x0018, 0x0019, 0x001a, 0x001b,
+	0x001c, 0x001d, 0x001e, 0x001f,
+	/* 0x20*/
+	0x0020, 0x0021, 0x0022, 0x0023,
+	0x0024, 0x0025, 0x0026, 0x0027,
+	0x0028, 0x0029, 0x002a, 0x002b,
+	0x002c, 0x002d, 0x002e, 0x002f,
+	/* 0x30*/
+	0x0030, 0x0031, 0x0032, 0x0033,
+	0x0034, 0x0035, 0x0036, 0x0037,
+	0x0038, 0x0039, 0x003a, 0x003b,
+	0x003c, 0x003d, 0x003e, 0x003f,
+	/* 0x40*/
+	0x0040, 0x0041, 0x0042, 0x0043,
+	0x0044, 0x0045, 0x0046, 0x0047,
+	0x0048, 0x0049, 0x004a, 0x004b,
+	0x004c, 0x004d, 0x004e, 0x004f,
+	/* 0x50*/
+	0x0050, 0x0051, 0x0052, 0x0053,
+	0x0054, 0x0055, 0x0056, 0x0057,
+	0x0058, 0x0059, 0x005a, 0x005b,
+	0x005c, 0x005d, 0x005e, 0x005f,
+	/* 0x60*/
+	0x0060, 0x0061, 0x0062, 0x0063,
+	0x0064, 0x0065, 0x0066, 0x0067,
+	0x0068, 0x0069, 0x006a, 0x006b,
+	0x006c, 0x006d, 0x006e, 0x006f,
+	/* 0x70*/
+	0x0070, 0x0071, 0x0072, 0x0073,
+	0x0074, 0x0075, 0x0076, 0x0077,
+	0x0078, 0x0079, 0x007a, 0x007b,
+	0x007c, 0x007d, 0x007e, 0x007f,
+	/* 0x80*/
+	0x0000, 0x0000, 0x00e9, 0x00e2,
+	0x0000, 0x00e0, 0x0000, 0x00e7,
+	0x00ea, 0x00eb, 0x00e8, 0x00ef,
+	0x00ee, 0x0000, 0x0000, 0x0000,
+	/* 0x90*/
+	0x0000, 0x0651, 0x0652, 0x00f4,
+	0x00a4, 0x0640, 0x00fb, 0x00f9,
+	0x0621, 0x0622, 0x0623, 0x0624,
+	0x00a3, 0x0625, 0x0626, 0x0627,
+	/* 0xa0*/
+	0x0628, 0x0629, 0x062a, 0x062b,
+	0x062c, 0x062d, 0x062e, 0x062f,
+	0x0630, 0x0631, 0x0632, 0x0633,
+	0x0634, 0x0635, 0x00ab, 0x00bb,
+	/* 0xb0*/
+	0x2591, 0x2592, 0x2593, 0x2502,
+	0x2524, 0x2561, 0x2562, 0x2556,
+	0x2555, 0x2563, 0x2551, 0x2557,
+	0x255d, 0x255c, 0x255b, 0x2510,
+	/* 0xc0*/
+	0x2514, 0x2534, 0x252c, 0x251c,
+	0x2500, 0x253c, 0x255e, 0x255f,
+	0x255a, 0x2554, 0x2569, 0x2566,
+	0x2560, 0x2550, 0x256c, 0x2567,
+	/* 0xd0*/
+	0x2568, 0x2564, 0x2565, 0x2559,
+	0x2558, 0x2552, 0x2553, 0x256b,
+	0x256a, 0x2518, 0x250c, 0x2588,
+	0x2584, 0x258c, 0x2590, 0x2580,
+	/* 0xe0*/
+	0x0636, 0x0637, 0x0638, 0x0639,
+	0x063a, 0x0641, 0x00b5, 0x0642,
+	0x0643, 0x0644, 0x0645, 0x0646,
+	0x0647, 0x0648, 0x0649, 0x064a,
+	/* 0xf0*/
+	0x2261, 0x064b, 0x064c, 0x064d,
+	0x064e, 0x064f, 0x0650, 0x2248,
+	0x00b0, 0x2219, 0x00b7, 0x221a,
+	0x207f, 0x00b2, 0x25a0, 0x00a0,
+};
+
+static const unsigned char page00[256] = {
+	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
+	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
+	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
+	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
+	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
+	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
+	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
+	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
+	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x40-0x47 */
+	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x48-0x4f */
+	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x50-0x57 */
+	0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
+	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x60-0x67 */
+	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x68-0x6f */
+	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x70-0x77 */
+	0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
+
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x80-0x87 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x88-0x8f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x98-0x9f */
+	0xff, 0x00, 0x00, 0x9c, 0x94, 0x00, 0x00, 0x00, /* 0xa0-0xa7 */
+	0x00, 0x00, 0x00, 0xae, 0x00, 0x00, 0x00, 0x00, /* 0xa8-0xaf */
+	0xf8, 0x00, 0xfd, 0x00, 0x00, 0xe6, 0x00, 0xfa, /* 0xb0-0xb7 */
+	0x00, 0x00, 0x00, 0xaf, 0x00, 0x00, 0x00, 0x00, /* 0xb8-0xbf */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc0-0xc7 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc8-0xcf */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xd0-0xd7 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xd8-0xdf */
+	0x85, 0x00, 0x83, 0x00, 0x00, 0x00, 0x00, 0x87, /* 0xe0-0xe7 */
+	0x8a, 0x82, 0x88, 0x89, 0x00, 0x00, 0x8c, 0x8b, /* 0xe8-0xef */
+	0x00, 0x00, 0x00, 0x00, 0x93, 0x00, 0x00, 0x00, /* 0xf0-0xf7 */
+	0x00, 0x97, 0x00, 0x96, 0x00, 0x00, 0x00, 0x00, /* 0xf8-0xff */
+};
+
+static const unsigned char page06[256] = {
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
+	0x00, 0x98, 0x99, 0x9a, 0x9b, 0x9d, 0x9e, 0x9f, /* 0x20-0x27 */
+	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0x28-0x2f */
+	0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xe0, 0xe1, /* 0x30-0x37 */
+	0xe2, 0xe3, 0xe4, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
+	0x95, 0xe5, 0xe7, 0xe8, 0xe9, 0xea, 0xeb, 0xec, /* 0x40-0x47 */
+	0xed, 0xee, 0xef, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, /* 0x48-0x4f */
+	0xf6, 0x91, 0x92, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
+};
+
+static const unsigned char page20[256] = {
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x27 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28-0x2f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30-0x37 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x40-0x47 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x48-0x4f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x58-0x5f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x68-0x6f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfc, /* 0x78-0x7f */
+};
+
+static const unsigned char page22[256] = {
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
+	0x00, 0xf9, 0xfb, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x27 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28-0x2f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30-0x37 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x40-0x47 */
+	0xf7, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x48-0x4f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x58-0x5f */
+	0x00, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
+};
+
+static const unsigned char page25[256] = {
+	0xc4, 0x00, 0xb3, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
+	0x00, 0x00, 0x00, 0x00, 0xda, 0x00, 0x00, 0x00, /* 0x08-0x0f */
+	0xbf, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, /* 0x10-0x17 */
+	0xd9, 0x00, 0x00, 0x00, 0xc3, 0x00, 0x00, 0x00, /* 0x18-0x1f */
+	0x00, 0x00, 0x00, 0x00, 0xb4, 0x00, 0x00, 0x00, /* 0x20-0x27 */
+	0x00, 0x00, 0x00, 0x00, 0xc2, 0x00, 0x00, 0x00, /* 0x28-0x2f */
+	0x00, 0x00, 0x00, 0x00, 0xc1, 0x00, 0x00, 0x00, /* 0x30-0x37 */
+	0x00, 0x00, 0x00, 0x00, 0xc5, 0x00, 0x00, 0x00, /* 0x38-0x3f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x40-0x47 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x48-0x4f */
+	0xcd, 0xba, 0xd5, 0xd6, 0xc9, 0xb8, 0xb7, 0xbb, /* 0x50-0x57 */
+	0xd4, 0xd3, 0xc8, 0xbe, 0xbd, 0xbc, 0xc6, 0xc7, /* 0x58-0x5f */
+	0xcc, 0xb5, 0xb6, 0xb9, 0xd1, 0xd2, 0xcb, 0xcf, /* 0x60-0x67 */
+	0xd0, 0xca, 0xd8, 0xd7, 0xce, 0x00, 0x00, 0x00, /* 0x68-0x6f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x78-0x7f */
+
+	0xdf, 0x00, 0x00, 0x00, 0xdc, 0x00, 0x00, 0x00, /* 0x80-0x87 */
+	0xdb, 0x00, 0x00, 0x00, 0xdd, 0x00, 0x00, 0x00, /* 0x88-0x8f */
+	0xde, 0xb0, 0xb1, 0xb2, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x98-0x9f */
+	0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa0-0xa7 */
+};
+
+static const unsigned char *const page_uni2charset[256] = {
+	page00, NULL,   NULL,   NULL,   NULL,   NULL,   page06, NULL,
+	NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,
+	NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,
+	NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,
+	page20, NULL,   page22, NULL,   NULL,   page25, NULL,   NULL,
+};
+
+static const unsigned char charset2lower[256] = {
+	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
+	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
+	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
+	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
+	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
+	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
+	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
+	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
+	0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x40-0x47 */
+	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x48-0x4f */
+	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x50-0x57 */
+	0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
+	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x60-0x67 */
+	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x68-0x6f */
+	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x70-0x77 */
+	0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
+
+	0x00, 0x00, 0x82, 0x83, 0x00, 0x85, 0x00, 0x87, /* 0x80-0x87 */
+	0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x00, 0x00, 0x00, /* 0x88-0x8f */
+	0x00, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */
+	0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */
+	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
+	0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
+	0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
+	0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */
+	0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
+	0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
+	0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */
+	0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */
+	0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
+	0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */
+	0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */
+	0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */
+};
+
+static const unsigned char charset2upper[256] = {
+	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
+	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
+	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
+	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
+	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
+	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
+	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
+	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
+	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x40-0x47 */
+	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x48-0x4f */
+	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x50-0x57 */
+	0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
+	0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x60-0x67 */
+	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x68-0x6f */
+	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x70-0x77 */
+	0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
+
+	0x00, 0x00, 0x82, 0x83, 0x00, 0x85, 0x00, 0x87, /* 0x80-0x87 */
+	0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x00, 0x00, 0x00, /* 0x88-0x8f */
+	0x00, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */
+	0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */
+	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
+	0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
+	0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
+	0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */
+	0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
+	0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
+	0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */
+	0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */
+	0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
+	0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */
+	0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */
+	0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */
+};
+
+static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
+{
+	const unsigned char *uni2charset;
+	unsigned char cl = uni & 0x00ff;
+	unsigned char ch = (uni & 0xff00) >> 8;
+
+	if (boundlen <= 0)
+		return -ENAMETOOLONG;
+
+	uni2charset = page_uni2charset[ch];
+	if (uni2charset && uni2charset[cl])
+		out[0] = uni2charset[cl];
+	else
+		return -EINVAL;
+	return 1;
+}
+
+static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
+{
+	*uni = charset2uni[*rawstring];
+	if (*uni == 0x0000)
+		return -EINVAL;
+	return 1;
+}
+
+static struct nls_table table = {
+	.charset	= "cp720",
+	.uni2char	= uni2char,
+	.char2uni	= char2uni,
+	.charset2lower	= charset2lower,
+	.charset2upper	= charset2upper,
+};
+
+static int __init init_nls_cp720(void)
+{
+	return register_nls(&table);
+}
+
+static void __exit exit_nls_cp720(void)
+{
+	unregister_nls(&table);
+}
+
+module_init(init_nls_cp720)
+module_exit(exit_nls_cp720)
+
+MODULE_DESCRIPTION("NLS Codepage 720 (Arabic)");
+MODULE_LICENSE("Dual BSD/GPL");
-- 
2.47.3


^ permalink raw reply related	[flat|nested] 6+ messages in thread

* Re: [PATCH 1/2] fs/nls: Add codepage 720 (Arabic)
  2026-11-08 20:01 ` [PATCH 1/2] fs/nls: Add codepage 720 (Arabic) Fuad Tabba
@ 2026-11-09 12:51   ` OGAWA Hirofumi
  2026-11-09 12:53     ` Fuad Tabba
  0 siblings, 1 reply; 6+ messages in thread
From: OGAWA Hirofumi @ 2026-11-09 12:51 UTC (permalink / raw)
  To: Fuad Tabba; +Cc: brauner, viro, linux-fsdevel, linux-kernel

Fuad Tabba <fuad.tabba@linux.dev> writes:

> FAT stores short names in the OEM code page of the system that wrote
> them, and the OEM code page of Arabic Windows is 720. The kernel's only
> DOS code page for Arabic is cp864, so mounting such a volume with
> codepage=720 fails with "codepage cp720 not found".
>
> Add nls_cp720 behind NLS_CODEPAGE_720, with tables generated by a
> script from Microsoft's code page 720 table, as ICU's windows-720-2000
> mapping carries it. That table maps 0x80, 0x81, 0x84, 0x86 and
> 0x8d-0x90 to C1 controls, and those eight bytes are left unassigned, as
> ICU's ibm-720 mapping leaves them.
>
> Signed-off-by: Fuad Tabba <fuad.tabba@linux.dev>

Looks good. However, maybe no maintainer in this area, so I'm not sure
who handle...

Thanks.

> ---
>  fs/nls/Kconfig     |  18 ++-
>  fs/nls/Makefile    |   1 +
>  fs/nls/nls_cp720.c | 335 +++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 351 insertions(+), 3 deletions(-)
>  create mode 100644 fs/nls/nls_cp720.c
>
> diff --git a/fs/nls/Kconfig b/fs/nls/Kconfig
> index 2a601af6f3bd5..a19ef628f779e 100644
> --- a/fs/nls/Kconfig
> +++ b/fs/nls/Kconfig
> @@ -26,9 +26,9 @@ config NLS_DEFAULT
>  	  the NLS used by your console, not the NLS used by a specific file
>  	  system (if different) to store data (filenames) on a disk.
>  	  Currently, the valid values are:
> -	  big5, cp437, cp737, cp775, cp850, cp852, cp855, cp857, cp860, cp861,
> -	  cp862, cp863, cp864, cp865, cp866, cp869, cp874, cp932, cp936,
> -	  cp949, cp950, cp1251, cp1255, euc-jp, euc-kr, gb2312, iso8859-1,
> +	  big5, cp437, cp720, cp737, cp775, cp850, cp852, cp855, cp857, cp860,
> +	  cp861, cp862, cp863, cp864, cp865, cp866, cp869, cp874, cp932,
> +	  cp936, cp949, cp950, cp1251, cp1255, euc-jp, euc-kr, gb2312, iso8859-1,
>  	  iso8859-2, iso8859-3, iso8859-4, iso8859-5, iso8859-6, iso8859-7,
>  	  iso8859-8, iso8859-9, iso8859-13, iso8859-14, iso8859-15,
>  	  koi8-r, koi8-ru, koi8-u, sjis, tis-620, macroman, utf8.
> @@ -49,6 +49,18 @@ config NLS_CODEPAGE_437
>  	  say Y here if you want to include the DOS codepage that is used in
>  	  the United States and parts of Canada. This is recommended.
>  
> +config NLS_CODEPAGE_720
> +	tristate "Codepage 720 (Arabic)"
> +	help
> +	  The Microsoft FAT file system family can deal with filenames in
> +	  native language character sets. These character sets are stored in
> +	  so-called DOS codepages. You need to include the appropriate
> +	  codepage if you want to be able to read/write these filenames on
> +	  DOS/Windows partitions correctly. This does apply to the filenames
> +	  only, not to the file contents. You can include several codepages;
> +	  say Y here if you want to include the DOS codepage for Arabic used
> +	  by Windows (OEM 720). If unsure, say N.
> +
>  config NLS_CODEPAGE_737
>  	tristate "Codepage 737 (Greek)"
>  	help
> diff --git a/fs/nls/Makefile b/fs/nls/Makefile
> index 5062c699d0411..2a9a847083592 100644
> --- a/fs/nls/Makefile
> +++ b/fs/nls/Makefile
> @@ -6,6 +6,7 @@
>  obj-$(CONFIG_NLS)		+= nls_base.o
>  
>  obj-$(CONFIG_NLS_CODEPAGE_437)	+= nls_cp437.o
> +obj-$(CONFIG_NLS_CODEPAGE_720)	+= nls_cp720.o
>  obj-$(CONFIG_NLS_CODEPAGE_737)	+= nls_cp737.o
>  obj-$(CONFIG_NLS_CODEPAGE_775)	+= nls_cp775.o
>  obj-$(CONFIG_NLS_CODEPAGE_850)	+= nls_cp850.o
> diff --git a/fs/nls/nls_cp720.c b/fs/nls/nls_cp720.c
> new file mode 100644
> index 0000000000000..bb57c61792d5f
> --- /dev/null
> +++ b/fs/nls/nls_cp720.c
> @@ -0,0 +1,335 @@
> +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
> +/*
> + * Charset cp720 translation tables.
> + * Generated from Microsoft's code page 720 table (ICU windows-720-2000),
> + * with the eight bytes it maps to C1 controls left unassigned.
> + * The Unicode to charset table has only exact mappings.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/kernel.h>
> +#include <linux/string.h>
> +#include <linux/nls.h>
> +#include <linux/errno.h>
> +
> +static const wchar_t charset2uni[256] = {
> +	/* 0x00*/
> +	0x0000, 0x0001, 0x0002, 0x0003,
> +	0x0004, 0x0005, 0x0006, 0x0007,
> +	0x0008, 0x0009, 0x000a, 0x000b,
> +	0x000c, 0x000d, 0x000e, 0x000f,
> +	/* 0x10*/
> +	0x0010, 0x0011, 0x0012, 0x0013,
> +	0x0014, 0x0015, 0x0016, 0x0017,
> +	0x0018, 0x0019, 0x001a, 0x001b,
> +	0x001c, 0x001d, 0x001e, 0x001f,
> +	/* 0x20*/
> +	0x0020, 0x0021, 0x0022, 0x0023,
> +	0x0024, 0x0025, 0x0026, 0x0027,
> +	0x0028, 0x0029, 0x002a, 0x002b,
> +	0x002c, 0x002d, 0x002e, 0x002f,
> +	/* 0x30*/
> +	0x0030, 0x0031, 0x0032, 0x0033,
> +	0x0034, 0x0035, 0x0036, 0x0037,
> +	0x0038, 0x0039, 0x003a, 0x003b,
> +	0x003c, 0x003d, 0x003e, 0x003f,
> +	/* 0x40*/
> +	0x0040, 0x0041, 0x0042, 0x0043,
> +	0x0044, 0x0045, 0x0046, 0x0047,
> +	0x0048, 0x0049, 0x004a, 0x004b,
> +	0x004c, 0x004d, 0x004e, 0x004f,
> +	/* 0x50*/
> +	0x0050, 0x0051, 0x0052, 0x0053,
> +	0x0054, 0x0055, 0x0056, 0x0057,
> +	0x0058, 0x0059, 0x005a, 0x005b,
> +	0x005c, 0x005d, 0x005e, 0x005f,
> +	/* 0x60*/
> +	0x0060, 0x0061, 0x0062, 0x0063,
> +	0x0064, 0x0065, 0x0066, 0x0067,
> +	0x0068, 0x0069, 0x006a, 0x006b,
> +	0x006c, 0x006d, 0x006e, 0x006f,
> +	/* 0x70*/
> +	0x0070, 0x0071, 0x0072, 0x0073,
> +	0x0074, 0x0075, 0x0076, 0x0077,
> +	0x0078, 0x0079, 0x007a, 0x007b,
> +	0x007c, 0x007d, 0x007e, 0x007f,
> +	/* 0x80*/
> +	0x0000, 0x0000, 0x00e9, 0x00e2,
> +	0x0000, 0x00e0, 0x0000, 0x00e7,
> +	0x00ea, 0x00eb, 0x00e8, 0x00ef,
> +	0x00ee, 0x0000, 0x0000, 0x0000,
> +	/* 0x90*/
> +	0x0000, 0x0651, 0x0652, 0x00f4,
> +	0x00a4, 0x0640, 0x00fb, 0x00f9,
> +	0x0621, 0x0622, 0x0623, 0x0624,
> +	0x00a3, 0x0625, 0x0626, 0x0627,
> +	/* 0xa0*/
> +	0x0628, 0x0629, 0x062a, 0x062b,
> +	0x062c, 0x062d, 0x062e, 0x062f,
> +	0x0630, 0x0631, 0x0632, 0x0633,
> +	0x0634, 0x0635, 0x00ab, 0x00bb,
> +	/* 0xb0*/
> +	0x2591, 0x2592, 0x2593, 0x2502,
> +	0x2524, 0x2561, 0x2562, 0x2556,
> +	0x2555, 0x2563, 0x2551, 0x2557,
> +	0x255d, 0x255c, 0x255b, 0x2510,
> +	/* 0xc0*/
> +	0x2514, 0x2534, 0x252c, 0x251c,
> +	0x2500, 0x253c, 0x255e, 0x255f,
> +	0x255a, 0x2554, 0x2569, 0x2566,
> +	0x2560, 0x2550, 0x256c, 0x2567,
> +	/* 0xd0*/
> +	0x2568, 0x2564, 0x2565, 0x2559,
> +	0x2558, 0x2552, 0x2553, 0x256b,
> +	0x256a, 0x2518, 0x250c, 0x2588,
> +	0x2584, 0x258c, 0x2590, 0x2580,
> +	/* 0xe0*/
> +	0x0636, 0x0637, 0x0638, 0x0639,
> +	0x063a, 0x0641, 0x00b5, 0x0642,
> +	0x0643, 0x0644, 0x0645, 0x0646,
> +	0x0647, 0x0648, 0x0649, 0x064a,
> +	/* 0xf0*/
> +	0x2261, 0x064b, 0x064c, 0x064d,
> +	0x064e, 0x064f, 0x0650, 0x2248,
> +	0x00b0, 0x2219, 0x00b7, 0x221a,
> +	0x207f, 0x00b2, 0x25a0, 0x00a0,
> +};
> +
> +static const unsigned char page00[256] = {
> +	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
> +	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
> +	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
> +	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
> +	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
> +	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
> +	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
> +	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
> +	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x40-0x47 */
> +	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x48-0x4f */
> +	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x50-0x57 */
> +	0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
> +	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x60-0x67 */
> +	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x68-0x6f */
> +	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x70-0x77 */
> +	0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
> +
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x80-0x87 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x88-0x8f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x98-0x9f */
> +	0xff, 0x00, 0x00, 0x9c, 0x94, 0x00, 0x00, 0x00, /* 0xa0-0xa7 */
> +	0x00, 0x00, 0x00, 0xae, 0x00, 0x00, 0x00, 0x00, /* 0xa8-0xaf */
> +	0xf8, 0x00, 0xfd, 0x00, 0x00, 0xe6, 0x00, 0xfa, /* 0xb0-0xb7 */
> +	0x00, 0x00, 0x00, 0xaf, 0x00, 0x00, 0x00, 0x00, /* 0xb8-0xbf */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc0-0xc7 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc8-0xcf */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xd0-0xd7 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xd8-0xdf */
> +	0x85, 0x00, 0x83, 0x00, 0x00, 0x00, 0x00, 0x87, /* 0xe0-0xe7 */
> +	0x8a, 0x82, 0x88, 0x89, 0x00, 0x00, 0x8c, 0x8b, /* 0xe8-0xef */
> +	0x00, 0x00, 0x00, 0x00, 0x93, 0x00, 0x00, 0x00, /* 0xf0-0xf7 */
> +	0x00, 0x97, 0x00, 0x96, 0x00, 0x00, 0x00, 0x00, /* 0xf8-0xff */
> +};
> +
> +static const unsigned char page06[256] = {
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
> +	0x00, 0x98, 0x99, 0x9a, 0x9b, 0x9d, 0x9e, 0x9f, /* 0x20-0x27 */
> +	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0x28-0x2f */
> +	0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xe0, 0xe1, /* 0x30-0x37 */
> +	0xe2, 0xe3, 0xe4, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
> +	0x95, 0xe5, 0xe7, 0xe8, 0xe9, 0xea, 0xeb, 0xec, /* 0x40-0x47 */
> +	0xed, 0xee, 0xef, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, /* 0x48-0x4f */
> +	0xf6, 0x91, 0x92, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
> +};
> +
> +static const unsigned char page20[256] = {
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x27 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28-0x2f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30-0x37 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x40-0x47 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x48-0x4f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x58-0x5f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x68-0x6f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xfc, /* 0x78-0x7f */
> +};
> +
> +static const unsigned char page22[256] = {
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
> +	0x00, 0xf9, 0xfb, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x27 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28-0x2f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30-0x37 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x40-0x47 */
> +	0xf7, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x48-0x4f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x58-0x5f */
> +	0x00, 0xf0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
> +};
> +
> +static const unsigned char page25[256] = {
> +	0xc4, 0x00, 0xb3, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
> +	0x00, 0x00, 0x00, 0x00, 0xda, 0x00, 0x00, 0x00, /* 0x08-0x0f */
> +	0xbf, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00, /* 0x10-0x17 */
> +	0xd9, 0x00, 0x00, 0x00, 0xc3, 0x00, 0x00, 0x00, /* 0x18-0x1f */
> +	0x00, 0x00, 0x00, 0x00, 0xb4, 0x00, 0x00, 0x00, /* 0x20-0x27 */
> +	0x00, 0x00, 0x00, 0x00, 0xc2, 0x00, 0x00, 0x00, /* 0x28-0x2f */
> +	0x00, 0x00, 0x00, 0x00, 0xc1, 0x00, 0x00, 0x00, /* 0x30-0x37 */
> +	0x00, 0x00, 0x00, 0x00, 0xc5, 0x00, 0x00, 0x00, /* 0x38-0x3f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x40-0x47 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x48-0x4f */
> +	0xcd, 0xba, 0xd5, 0xd6, 0xc9, 0xb8, 0xb7, 0xbb, /* 0x50-0x57 */
> +	0xd4, 0xd3, 0xc8, 0xbe, 0xbd, 0xbc, 0xc6, 0xc7, /* 0x58-0x5f */
> +	0xcc, 0xb5, 0xb6, 0xb9, 0xd1, 0xd2, 0xcb, 0xcf, /* 0x60-0x67 */
> +	0xd0, 0xca, 0xd8, 0xd7, 0xce, 0x00, 0x00, 0x00, /* 0x68-0x6f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x78-0x7f */
> +
> +	0xdf, 0x00, 0x00, 0x00, 0xdc, 0x00, 0x00, 0x00, /* 0x80-0x87 */
> +	0xdb, 0x00, 0x00, 0x00, 0xdd, 0x00, 0x00, 0x00, /* 0x88-0x8f */
> +	0xde, 0xb0, 0xb1, 0xb2, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x98-0x9f */
> +	0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa0-0xa7 */
> +};
> +
> +static const unsigned char *const page_uni2charset[256] = {
> +	page00, NULL,   NULL,   NULL,   NULL,   NULL,   page06, NULL,
> +	NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,
> +	NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,
> +	NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,
> +	page20, NULL,   page22, NULL,   NULL,   page25, NULL,   NULL,
> +};
> +
> +static const unsigned char charset2lower[256] = {
> +	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
> +	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
> +	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
> +	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
> +	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
> +	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
> +	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
> +	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
> +	0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x40-0x47 */
> +	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x48-0x4f */
> +	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x50-0x57 */
> +	0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
> +	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x60-0x67 */
> +	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x68-0x6f */
> +	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x70-0x77 */
> +	0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
> +
> +	0x00, 0x00, 0x82, 0x83, 0x00, 0x85, 0x00, 0x87, /* 0x80-0x87 */
> +	0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x00, 0x00, 0x00, /* 0x88-0x8f */
> +	0x00, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */
> +	0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */
> +	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
> +	0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
> +	0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
> +	0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */
> +	0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
> +	0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
> +	0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */
> +	0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */
> +	0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
> +	0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */
> +	0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */
> +	0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */
> +};
> +
> +static const unsigned char charset2upper[256] = {
> +	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
> +	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
> +	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
> +	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
> +	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
> +	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
> +	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
> +	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
> +	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x40-0x47 */
> +	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x48-0x4f */
> +	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x50-0x57 */
> +	0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
> +	0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x60-0x67 */
> +	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x68-0x6f */
> +	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x70-0x77 */
> +	0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
> +
> +	0x00, 0x00, 0x82, 0x83, 0x00, 0x85, 0x00, 0x87, /* 0x80-0x87 */
> +	0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x00, 0x00, 0x00, /* 0x88-0x8f */
> +	0x00, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */
> +	0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */
> +	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
> +	0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
> +	0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
> +	0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */
> +	0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
> +	0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
> +	0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */
> +	0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */
> +	0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
> +	0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */
> +	0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */
> +	0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */
> +};
> +
> +static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
> +{
> +	const unsigned char *uni2charset;
> +	unsigned char cl = uni & 0x00ff;
> +	unsigned char ch = (uni & 0xff00) >> 8;
> +
> +	if (boundlen <= 0)
> +		return -ENAMETOOLONG;
> +
> +	uni2charset = page_uni2charset[ch];
> +	if (uni2charset && uni2charset[cl])
> +		out[0] = uni2charset[cl];
> +	else
> +		return -EINVAL;
> +	return 1;
> +}
> +
> +static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
> +{
> +	*uni = charset2uni[*rawstring];
> +	if (*uni == 0x0000)
> +		return -EINVAL;
> +	return 1;
> +}
> +
> +static struct nls_table table = {
> +	.charset	= "cp720",
> +	.uni2char	= uni2char,
> +	.char2uni	= char2uni,
> +	.charset2lower	= charset2lower,
> +	.charset2upper	= charset2upper,
> +};
> +
> +static int __init init_nls_cp720(void)
> +{
> +	return register_nls(&table);
> +}
> +
> +static void __exit exit_nls_cp720(void)
> +{
> +	unregister_nls(&table);
> +}
> +
> +module_init(init_nls_cp720)
> +module_exit(exit_nls_cp720)
> +
> +MODULE_DESCRIPTION("NLS Codepage 720 (Arabic)");
> +MODULE_LICENSE("Dual BSD/GPL");

-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>

^ permalink raw reply	[flat|nested] 6+ messages in thread

* Re: [PATCH 1/2] fs/nls: Add codepage 720 (Arabic)
  2026-11-09 12:51   ` OGAWA Hirofumi
@ 2026-11-09 12:53     ` Fuad Tabba
  0 siblings, 0 replies; 6+ messages in thread
From: Fuad Tabba @ 2026-11-09 12:53 UTC (permalink / raw)
  To: OGAWA Hirofumi; +Cc: brauner, viro, linux-fsdevel, linux-kernel

On Mon, 9 Nov 2026 at 12:51, OGAWA Hirofumi <hirofumi@mail.parknet.co.jp> wrote:
>
> Fuad Tabba <fuad.tabba@linux.dev> writes:
>
> > FAT stores short names in the OEM code page of the system that wrote
> > them, and the OEM code page of Arabic Windows is 720. The kernel's only
> > DOS code page for Arabic is cp864, so mounting such a volume with
> > codepage=720 fails with "codepage cp720 not found".
> >
> > Add nls_cp720 behind NLS_CODEPAGE_720, with tables generated by a
> > script from Microsoft's code page 720 table, as ICU's windows-720-2000
> > mapping carries it. That table maps 0x80, 0x81, 0x84, 0x86 and
> > 0x8d-0x90 to C1 controls, and those eight bytes are left unassigned, as
> > ICU's ibm-720 mapping leaves them.
> >
> > Signed-off-by: Fuad Tabba <fuad.tabba@linux.dev>
>
> Looks good. However, maybe no maintainer in this area, so I'm not sure
> who handle...

I was wondering the same thing :)

Thanks,
/fuad

^ permalink raw reply	[flat|nested] 6+ messages in thread

* [PATCH 2/2] fs/nls: Add Windows codepage 1256 (Arabic)
  2026-11-08 20:01 [PATCH 0/2] fs/nls: Add Arabic code pages CP720 and CP1256 Fuad Tabba
  2026-11-08 20:01 ` [PATCH 1/2] fs/nls: Add codepage 720 (Arabic) Fuad Tabba
@ 2026-11-08 20:01 ` Fuad Tabba
  2026-11-09 12:51   ` OGAWA Hirofumi
  1 sibling, 1 reply; 6+ messages in thread
From: Fuad Tabba @ 2026-11-08 20:01 UTC (permalink / raw)
  To: brauner, viro; +Cc: hirofumi, linux-fsdevel, linux-kernel, fuad.tabba

The kernel has no table for CP1256, the Windows code page for Arabic,
so a vfat mount with iocharset=cp1256 fails with "IO charset cp1256 not
found".

Add nls_cp1256 behind NLS_CODEPAGE_1256, with tables generated by a
script from the Unicode Organization's CP1256 table. The only case pair
outside ASCII is Œ and œ.

Signed-off-by: Fuad Tabba <fuad.tabba@linux.dev>
---
 fs/nls/Kconfig      |  18 ++-
 fs/nls/Makefile     |   1 +
 fs/nls/nls_cp1256.c | 378 ++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 394 insertions(+), 3 deletions(-)
 create mode 100644 fs/nls/nls_cp1256.c

diff --git a/fs/nls/Kconfig b/fs/nls/Kconfig
index a19ef628f779e..9f5de571151ed 100644
--- a/fs/nls/Kconfig
+++ b/fs/nls/Kconfig
@@ -28,9 +28,9 @@ config NLS_DEFAULT
 	  Currently, the valid values are:
 	  big5, cp437, cp720, cp737, cp775, cp850, cp852, cp855, cp857, cp860,
 	  cp861, cp862, cp863, cp864, cp865, cp866, cp869, cp874, cp932,
-	  cp936, cp949, cp950, cp1251, cp1255, euc-jp, euc-kr, gb2312, iso8859-1,
-	  iso8859-2, iso8859-3, iso8859-4, iso8859-5, iso8859-6, iso8859-7,
-	  iso8859-8, iso8859-9, iso8859-13, iso8859-14, iso8859-15,
+	  cp936, cp949, cp950, cp1251, cp1255, cp1256, euc-jp, euc-kr, gb2312,
+	  iso8859-1, iso8859-2, iso8859-3, iso8859-4, iso8859-5, iso8859-6,
+	  iso8859-7, iso8859-8, iso8859-9, iso8859-13, iso8859-14, iso8859-15,
 	  koi8-r, koi8-ru, koi8-u, sjis, tis-620, macroman, utf8.
 	  If you specify a wrong value, it will use the built-in NLS;
 	  compatible with iso8859-1.
@@ -321,6 +321,18 @@ config NLS_CODEPAGE_1251
 	  say Y here if you want to include the DOS codepage for Russian and
 	  Bulgarian and Belarusian.
 
+config NLS_CODEPAGE_1256
+	tristate "Windows CP1256 (Arabic)"
+	help
+	  The Microsoft FAT file system family can deal with filenames in
+	  native language character sets. These character sets are stored in
+	  so-called DOS codepages. You need to include the appropriate
+	  codepage if you want to be able to read/write these filenames on
+	  DOS/Windows partitions correctly. This does apply to the filenames
+	  only, not to the file contents. You can include several codepages;
+	  say Y here if you want to include the Windows codepage for Arabic.
+	  If unsure, say N.
+
 config NLS_ASCII
 	tristate "ASCII (United States)"
 	help
diff --git a/fs/nls/Makefile b/fs/nls/Makefile
index 2a9a847083592..2ef95c105d511 100644
--- a/fs/nls/Makefile
+++ b/fs/nls/Makefile
@@ -28,6 +28,7 @@ obj-$(CONFIG_NLS_CODEPAGE_949)	+= nls_cp949.o
 obj-$(CONFIG_NLS_CODEPAGE_950)	+= nls_cp950.o
 obj-$(CONFIG_NLS_CODEPAGE_1250) += nls_cp1250.o
 obj-$(CONFIG_NLS_CODEPAGE_1251)	+= nls_cp1251.o
+obj-$(CONFIG_NLS_CODEPAGE_1256)	+= nls_cp1256.o
 obj-$(CONFIG_NLS_ASCII)		+= nls_ascii.o
 obj-$(CONFIG_NLS_ISO8859_1)	+= nls_iso8859-1.o
 obj-$(CONFIG_NLS_ISO8859_2)	+= nls_iso8859-2.o
diff --git a/fs/nls/nls_cp1256.c b/fs/nls/nls_cp1256.c
new file mode 100644
index 0000000000000..8c766255ba39f
--- /dev/null
+++ b/fs/nls/nls_cp1256.c
@@ -0,0 +1,378 @@
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
+/*
+ * Charset cp1256 translation tables.
+ * Generated automatically from the Unicode and charset
+ * tables from the Unicode Organization (www.unicode.org).
+ * The Unicode to charset table has only exact mappings.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/string.h>
+#include <linux/nls.h>
+#include <linux/errno.h>
+
+static const wchar_t charset2uni[256] = {
+	/* 0x00*/
+	0x0000, 0x0001, 0x0002, 0x0003,
+	0x0004, 0x0005, 0x0006, 0x0007,
+	0x0008, 0x0009, 0x000a, 0x000b,
+	0x000c, 0x000d, 0x000e, 0x000f,
+	/* 0x10*/
+	0x0010, 0x0011, 0x0012, 0x0013,
+	0x0014, 0x0015, 0x0016, 0x0017,
+	0x0018, 0x0019, 0x001a, 0x001b,
+	0x001c, 0x001d, 0x001e, 0x001f,
+	/* 0x20*/
+	0x0020, 0x0021, 0x0022, 0x0023,
+	0x0024, 0x0025, 0x0026, 0x0027,
+	0x0028, 0x0029, 0x002a, 0x002b,
+	0x002c, 0x002d, 0x002e, 0x002f,
+	/* 0x30*/
+	0x0030, 0x0031, 0x0032, 0x0033,
+	0x0034, 0x0035, 0x0036, 0x0037,
+	0x0038, 0x0039, 0x003a, 0x003b,
+	0x003c, 0x003d, 0x003e, 0x003f,
+	/* 0x40*/
+	0x0040, 0x0041, 0x0042, 0x0043,
+	0x0044, 0x0045, 0x0046, 0x0047,
+	0x0048, 0x0049, 0x004a, 0x004b,
+	0x004c, 0x004d, 0x004e, 0x004f,
+	/* 0x50*/
+	0x0050, 0x0051, 0x0052, 0x0053,
+	0x0054, 0x0055, 0x0056, 0x0057,
+	0x0058, 0x0059, 0x005a, 0x005b,
+	0x005c, 0x005d, 0x005e, 0x005f,
+	/* 0x60*/
+	0x0060, 0x0061, 0x0062, 0x0063,
+	0x0064, 0x0065, 0x0066, 0x0067,
+	0x0068, 0x0069, 0x006a, 0x006b,
+	0x006c, 0x006d, 0x006e, 0x006f,
+	/* 0x70*/
+	0x0070, 0x0071, 0x0072, 0x0073,
+	0x0074, 0x0075, 0x0076, 0x0077,
+	0x0078, 0x0079, 0x007a, 0x007b,
+	0x007c, 0x007d, 0x007e, 0x007f,
+	/* 0x80*/
+	0x20ac, 0x067e, 0x201a, 0x0192,
+	0x201e, 0x2026, 0x2020, 0x2021,
+	0x02c6, 0x2030, 0x0679, 0x2039,
+	0x0152, 0x0686, 0x0698, 0x0688,
+	/* 0x90*/
+	0x06af, 0x2018, 0x2019, 0x201c,
+	0x201d, 0x2022, 0x2013, 0x2014,
+	0x06a9, 0x2122, 0x0691, 0x203a,
+	0x0153, 0x200c, 0x200d, 0x06ba,
+	/* 0xa0*/
+	0x00a0, 0x060c, 0x00a2, 0x00a3,
+	0x00a4, 0x00a5, 0x00a6, 0x00a7,
+	0x00a8, 0x00a9, 0x06be, 0x00ab,
+	0x00ac, 0x00ad, 0x00ae, 0x00af,
+	/* 0xb0*/
+	0x00b0, 0x00b1, 0x00b2, 0x00b3,
+	0x00b4, 0x00b5, 0x00b6, 0x00b7,
+	0x00b8, 0x00b9, 0x061b, 0x00bb,
+	0x00bc, 0x00bd, 0x00be, 0x061f,
+	/* 0xc0*/
+	0x06c1, 0x0621, 0x0622, 0x0623,
+	0x0624, 0x0625, 0x0626, 0x0627,
+	0x0628, 0x0629, 0x062a, 0x062b,
+	0x062c, 0x062d, 0x062e, 0x062f,
+	/* 0xd0*/
+	0x0630, 0x0631, 0x0632, 0x0633,
+	0x0634, 0x0635, 0x0636, 0x00d7,
+	0x0637, 0x0638, 0x0639, 0x063a,
+	0x0640, 0x0641, 0x0642, 0x0643,
+	/* 0xe0*/
+	0x00e0, 0x0644, 0x00e2, 0x0645,
+	0x0646, 0x0647, 0x0648, 0x00e7,
+	0x00e8, 0x00e9, 0x00ea, 0x00eb,
+	0x0649, 0x064a, 0x00ee, 0x00ef,
+	/* 0xf0*/
+	0x064b, 0x064c, 0x064d, 0x064e,
+	0x00f4, 0x064f, 0x0650, 0x00f7,
+	0x0651, 0x00f9, 0x0652, 0x00fb,
+	0x00fc, 0x200e, 0x200f, 0x06d2,
+};
+
+static const unsigned char page00[256] = {
+	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
+	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
+	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
+	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
+	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
+	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
+	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
+	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
+	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x40-0x47 */
+	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x48-0x4f */
+	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x50-0x57 */
+	0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
+	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x60-0x67 */
+	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x68-0x6f */
+	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x70-0x77 */
+	0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
+
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x80-0x87 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x88-0x8f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x98-0x9f */
+	0xa0, 0x00, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
+	0xa8, 0xa9, 0x00, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
+	0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
+	0xb8, 0xb9, 0x00, 0xbb, 0xbc, 0xbd, 0xbe, 0x00, /* 0xb8-0xbf */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc0-0xc7 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc8-0xcf */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd7, /* 0xd0-0xd7 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xd8-0xdf */
+	0xe0, 0x00, 0xe2, 0x00, 0x00, 0x00, 0x00, 0xe7, /* 0xe0-0xe7 */
+	0xe8, 0xe9, 0xea, 0xeb, 0x00, 0x00, 0xee, 0xef, /* 0xe8-0xef */
+	0x00, 0x00, 0x00, 0x00, 0xf4, 0x00, 0x00, 0xf7, /* 0xf0-0xf7 */
+	0x00, 0xf9, 0x00, 0xfb, 0xfc, 0x00, 0x00, 0x00, /* 0xf8-0xff */
+};
+
+static const unsigned char page01[256] = {
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x27 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28-0x2f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30-0x37 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x40-0x47 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x48-0x4f */
+	0x00, 0x00, 0x8c, 0x9c, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x58-0x5f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x68-0x6f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x78-0x7f */
+
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x80-0x87 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x88-0x8f */
+	0x00, 0x00, 0x83, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
+};
+
+static const unsigned char page02[256] = {
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x27 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28-0x2f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30-0x37 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x40-0x47 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x48-0x4f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x58-0x5f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x68-0x6f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x78-0x7f */
+
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x80-0x87 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x88-0x8f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x98-0x9f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa0-0xa7 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa8-0xaf */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb0-0xb7 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb8-0xbf */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x00, /* 0xc0-0xc7 */
+};
+
+static const unsigned char page06[256] = {
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
+	0x00, 0x00, 0x00, 0x00, 0xa1, 0x00, 0x00, 0x00, /* 0x08-0x0f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
+	0x00, 0x00, 0x00, 0xba, 0x00, 0x00, 0x00, 0xbf, /* 0x18-0x1f */
+	0x00, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0x20-0x27 */
+	0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0x28-0x2f */
+	0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd8, /* 0x30-0x37 */
+	0xd9, 0xda, 0xdb, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
+	0xdc, 0xdd, 0xde, 0xdf, 0xe1, 0xe3, 0xe4, 0xe5, /* 0x40-0x47 */
+	0xe6, 0xec, 0xed, 0xf0, 0xf1, 0xf2, 0xf3, 0xf5, /* 0x48-0x4f */
+	0xf6, 0xf8, 0xfa, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x58-0x5f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x68-0x6f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
+	0x00, 0x8a, 0x00, 0x00, 0x00, 0x00, 0x81, 0x00, /* 0x78-0x7f */
+
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8d, 0x00, /* 0x80-0x87 */
+	0x8f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x88-0x8f */
+	0x00, 0x9a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
+	0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x98-0x9f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa0-0xa7 */
+	0x00, 0x98, 0x00, 0x00, 0x00, 0x00, 0x00, 0x90, /* 0xa8-0xaf */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb0-0xb7 */
+	0x00, 0x00, 0x9f, 0x00, 0x00, 0x00, 0xaa, 0x00, /* 0xb8-0xbf */
+	0x00, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc0-0xc7 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc8-0xcf */
+	0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xd0-0xd7 */
+};
+
+static const unsigned char page20[256] = {
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
+	0x00, 0x00, 0x00, 0x00, 0x9d, 0x9e, 0xfd, 0xfe, /* 0x08-0x0f */
+	0x00, 0x00, 0x00, 0x96, 0x97, 0x00, 0x00, 0x00, /* 0x10-0x17 */
+	0x91, 0x92, 0x82, 0x00, 0x93, 0x94, 0x84, 0x00, /* 0x18-0x1f */
+	0x86, 0x87, 0x95, 0x00, 0x00, 0x00, 0x85, 0x00, /* 0x20-0x27 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28-0x2f */
+	0x89, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30-0x37 */
+	0x00, 0x8b, 0x9b, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x40-0x47 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x48-0x4f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x58-0x5f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x68-0x6f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x78-0x7f */
+
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x80-0x87 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x88-0x8f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x98-0x9f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa0-0xa7 */
+	0x00, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, /* 0xa8-0xaf */
+};
+
+static const unsigned char page21[256] = {
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
+	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
+	0x00, 0x00, 0x99, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x27 */
+};
+
+static const unsigned char *const page_uni2charset[256] = {
+	page00, page01, page02, NULL,   NULL,   NULL,   page06, NULL,
+	NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,
+	NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,
+	NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,
+	page20, page21, NULL,   NULL,   NULL,   NULL,   NULL,   NULL,
+};
+
+static const unsigned char charset2lower[256] = {
+	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
+	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
+	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
+	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
+	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
+	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
+	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
+	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
+	0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x40-0x47 */
+	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x48-0x4f */
+	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x50-0x57 */
+	0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
+	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x60-0x67 */
+	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x68-0x6f */
+	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x70-0x77 */
+	0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
+
+	0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 0x80-0x87 */
+	0x88, 0x89, 0x8a, 0x8b, 0x9c, 0x8d, 0x8e, 0x8f, /* 0x88-0x8f */
+	0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */
+	0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */
+	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
+	0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
+	0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
+	0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */
+	0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
+	0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
+	0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */
+	0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */
+	0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
+	0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */
+	0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */
+	0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */
+};
+
+static const unsigned char charset2upper[256] = {
+	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
+	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
+	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
+	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
+	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
+	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
+	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
+	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
+	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x40-0x47 */
+	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x48-0x4f */
+	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x50-0x57 */
+	0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
+	0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x60-0x67 */
+	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x68-0x6f */
+	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x70-0x77 */
+	0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
+
+	0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 0x80-0x87 */
+	0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 0x88-0x8f */
+	0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */
+	0x98, 0x99, 0x9a, 0x9b, 0x8c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */
+	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
+	0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
+	0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
+	0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */
+	0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
+	0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
+	0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */
+	0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */
+	0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
+	0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */
+	0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */
+	0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */
+};
+
+static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
+{
+	const unsigned char *uni2charset;
+	unsigned char cl = uni & 0x00ff;
+	unsigned char ch = (uni & 0xff00) >> 8;
+
+	if (boundlen <= 0)
+		return -ENAMETOOLONG;
+
+	uni2charset = page_uni2charset[ch];
+	if (uni2charset && uni2charset[cl])
+		out[0] = uni2charset[cl];
+	else
+		return -EINVAL;
+	return 1;
+}
+
+static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
+{
+	*uni = charset2uni[*rawstring];
+	if (*uni == 0x0000)
+		return -EINVAL;
+	return 1;
+}
+
+static struct nls_table table = {
+	.charset	= "cp1256",
+	.uni2char	= uni2char,
+	.char2uni	= char2uni,
+	.charset2lower	= charset2lower,
+	.charset2upper	= charset2upper,
+};
+
+static int __init init_nls_cp1256(void)
+{
+	return register_nls(&table);
+}
+
+static void __exit exit_nls_cp1256(void)
+{
+	unregister_nls(&table);
+}
+
+module_init(init_nls_cp1256)
+module_exit(exit_nls_cp1256)
+
+MODULE_DESCRIPTION("NLS Windows CP1256 (Arabic)");
+MODULE_LICENSE("Dual BSD/GPL");
-- 
2.47.3


^ permalink raw reply related	[flat|nested] 6+ messages in thread

* Re: [PATCH 2/2] fs/nls: Add Windows codepage 1256 (Arabic)
  2026-11-08 20:01 ` [PATCH 2/2] fs/nls: Add Windows codepage 1256 (Arabic) Fuad Tabba
@ 2026-11-09 12:51   ` OGAWA Hirofumi
  0 siblings, 0 replies; 6+ messages in thread
From: OGAWA Hirofumi @ 2026-11-09 12:51 UTC (permalink / raw)
  To: Fuad Tabba; +Cc: brauner, viro, linux-fsdevel, linux-kernel

Fuad Tabba <fuad.tabba@linux.dev> writes:

> The kernel has no table for CP1256, the Windows code page for Arabic,
> so a vfat mount with iocharset=cp1256 fails with "IO charset cp1256 not
> found".
>
> Add nls_cp1256 behind NLS_CODEPAGE_1256, with tables generated by a
> script from the Unicode Organization's CP1256 table. The only case pair
> outside ASCII is Œ and œ.
>
> Signed-off-by: Fuad Tabba <fuad.tabba@linux.dev>

Looks good too.

Thanks.

> ---
>  fs/nls/Kconfig      |  18 ++-
>  fs/nls/Makefile     |   1 +
>  fs/nls/nls_cp1256.c | 378 ++++++++++++++++++++++++++++++++++++++++++++
>  3 files changed, 394 insertions(+), 3 deletions(-)
>  create mode 100644 fs/nls/nls_cp1256.c
>
> diff --git a/fs/nls/Kconfig b/fs/nls/Kconfig
> index a19ef628f779e..9f5de571151ed 100644
> --- a/fs/nls/Kconfig
> +++ b/fs/nls/Kconfig
> @@ -28,9 +28,9 @@ config NLS_DEFAULT
>  	  Currently, the valid values are:
>  	  big5, cp437, cp720, cp737, cp775, cp850, cp852, cp855, cp857, cp860,
>  	  cp861, cp862, cp863, cp864, cp865, cp866, cp869, cp874, cp932,
> -	  cp936, cp949, cp950, cp1251, cp1255, euc-jp, euc-kr, gb2312, iso8859-1,
> -	  iso8859-2, iso8859-3, iso8859-4, iso8859-5, iso8859-6, iso8859-7,
> -	  iso8859-8, iso8859-9, iso8859-13, iso8859-14, iso8859-15,
> +	  cp936, cp949, cp950, cp1251, cp1255, cp1256, euc-jp, euc-kr, gb2312,
> +	  iso8859-1, iso8859-2, iso8859-3, iso8859-4, iso8859-5, iso8859-6,
> +	  iso8859-7, iso8859-8, iso8859-9, iso8859-13, iso8859-14, iso8859-15,
>  	  koi8-r, koi8-ru, koi8-u, sjis, tis-620, macroman, utf8.
>  	  If you specify a wrong value, it will use the built-in NLS;
>  	  compatible with iso8859-1.
> @@ -321,6 +321,18 @@ config NLS_CODEPAGE_1251
>  	  say Y here if you want to include the DOS codepage for Russian and
>  	  Bulgarian and Belarusian.
>  
> +config NLS_CODEPAGE_1256
> +	tristate "Windows CP1256 (Arabic)"
> +	help
> +	  The Microsoft FAT file system family can deal with filenames in
> +	  native language character sets. These character sets are stored in
> +	  so-called DOS codepages. You need to include the appropriate
> +	  codepage if you want to be able to read/write these filenames on
> +	  DOS/Windows partitions correctly. This does apply to the filenames
> +	  only, not to the file contents. You can include several codepages;
> +	  say Y here if you want to include the Windows codepage for Arabic.
> +	  If unsure, say N.
> +
>  config NLS_ASCII
>  	tristate "ASCII (United States)"
>  	help
> diff --git a/fs/nls/Makefile b/fs/nls/Makefile
> index 2a9a847083592..2ef95c105d511 100644
> --- a/fs/nls/Makefile
> +++ b/fs/nls/Makefile
> @@ -28,6 +28,7 @@ obj-$(CONFIG_NLS_CODEPAGE_949)	+= nls_cp949.o
>  obj-$(CONFIG_NLS_CODEPAGE_950)	+= nls_cp950.o
>  obj-$(CONFIG_NLS_CODEPAGE_1250) += nls_cp1250.o
>  obj-$(CONFIG_NLS_CODEPAGE_1251)	+= nls_cp1251.o
> +obj-$(CONFIG_NLS_CODEPAGE_1256)	+= nls_cp1256.o
>  obj-$(CONFIG_NLS_ASCII)		+= nls_ascii.o
>  obj-$(CONFIG_NLS_ISO8859_1)	+= nls_iso8859-1.o
>  obj-$(CONFIG_NLS_ISO8859_2)	+= nls_iso8859-2.o
> diff --git a/fs/nls/nls_cp1256.c b/fs/nls/nls_cp1256.c
> new file mode 100644
> index 0000000000000..8c766255ba39f
> --- /dev/null
> +++ b/fs/nls/nls_cp1256.c
> @@ -0,0 +1,378 @@
> +// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
> +/*
> + * Charset cp1256 translation tables.
> + * Generated automatically from the Unicode and charset
> + * tables from the Unicode Organization (www.unicode.org).
> + * The Unicode to charset table has only exact mappings.
> + */
> +
> +#include <linux/module.h>
> +#include <linux/kernel.h>
> +#include <linux/string.h>
> +#include <linux/nls.h>
> +#include <linux/errno.h>
> +
> +static const wchar_t charset2uni[256] = {
> +	/* 0x00*/
> +	0x0000, 0x0001, 0x0002, 0x0003,
> +	0x0004, 0x0005, 0x0006, 0x0007,
> +	0x0008, 0x0009, 0x000a, 0x000b,
> +	0x000c, 0x000d, 0x000e, 0x000f,
> +	/* 0x10*/
> +	0x0010, 0x0011, 0x0012, 0x0013,
> +	0x0014, 0x0015, 0x0016, 0x0017,
> +	0x0018, 0x0019, 0x001a, 0x001b,
> +	0x001c, 0x001d, 0x001e, 0x001f,
> +	/* 0x20*/
> +	0x0020, 0x0021, 0x0022, 0x0023,
> +	0x0024, 0x0025, 0x0026, 0x0027,
> +	0x0028, 0x0029, 0x002a, 0x002b,
> +	0x002c, 0x002d, 0x002e, 0x002f,
> +	/* 0x30*/
> +	0x0030, 0x0031, 0x0032, 0x0033,
> +	0x0034, 0x0035, 0x0036, 0x0037,
> +	0x0038, 0x0039, 0x003a, 0x003b,
> +	0x003c, 0x003d, 0x003e, 0x003f,
> +	/* 0x40*/
> +	0x0040, 0x0041, 0x0042, 0x0043,
> +	0x0044, 0x0045, 0x0046, 0x0047,
> +	0x0048, 0x0049, 0x004a, 0x004b,
> +	0x004c, 0x004d, 0x004e, 0x004f,
> +	/* 0x50*/
> +	0x0050, 0x0051, 0x0052, 0x0053,
> +	0x0054, 0x0055, 0x0056, 0x0057,
> +	0x0058, 0x0059, 0x005a, 0x005b,
> +	0x005c, 0x005d, 0x005e, 0x005f,
> +	/* 0x60*/
> +	0x0060, 0x0061, 0x0062, 0x0063,
> +	0x0064, 0x0065, 0x0066, 0x0067,
> +	0x0068, 0x0069, 0x006a, 0x006b,
> +	0x006c, 0x006d, 0x006e, 0x006f,
> +	/* 0x70*/
> +	0x0070, 0x0071, 0x0072, 0x0073,
> +	0x0074, 0x0075, 0x0076, 0x0077,
> +	0x0078, 0x0079, 0x007a, 0x007b,
> +	0x007c, 0x007d, 0x007e, 0x007f,
> +	/* 0x80*/
> +	0x20ac, 0x067e, 0x201a, 0x0192,
> +	0x201e, 0x2026, 0x2020, 0x2021,
> +	0x02c6, 0x2030, 0x0679, 0x2039,
> +	0x0152, 0x0686, 0x0698, 0x0688,
> +	/* 0x90*/
> +	0x06af, 0x2018, 0x2019, 0x201c,
> +	0x201d, 0x2022, 0x2013, 0x2014,
> +	0x06a9, 0x2122, 0x0691, 0x203a,
> +	0x0153, 0x200c, 0x200d, 0x06ba,
> +	/* 0xa0*/
> +	0x00a0, 0x060c, 0x00a2, 0x00a3,
> +	0x00a4, 0x00a5, 0x00a6, 0x00a7,
> +	0x00a8, 0x00a9, 0x06be, 0x00ab,
> +	0x00ac, 0x00ad, 0x00ae, 0x00af,
> +	/* 0xb0*/
> +	0x00b0, 0x00b1, 0x00b2, 0x00b3,
> +	0x00b4, 0x00b5, 0x00b6, 0x00b7,
> +	0x00b8, 0x00b9, 0x061b, 0x00bb,
> +	0x00bc, 0x00bd, 0x00be, 0x061f,
> +	/* 0xc0*/
> +	0x06c1, 0x0621, 0x0622, 0x0623,
> +	0x0624, 0x0625, 0x0626, 0x0627,
> +	0x0628, 0x0629, 0x062a, 0x062b,
> +	0x062c, 0x062d, 0x062e, 0x062f,
> +	/* 0xd0*/
> +	0x0630, 0x0631, 0x0632, 0x0633,
> +	0x0634, 0x0635, 0x0636, 0x00d7,
> +	0x0637, 0x0638, 0x0639, 0x063a,
> +	0x0640, 0x0641, 0x0642, 0x0643,
> +	/* 0xe0*/
> +	0x00e0, 0x0644, 0x00e2, 0x0645,
> +	0x0646, 0x0647, 0x0648, 0x00e7,
> +	0x00e8, 0x00e9, 0x00ea, 0x00eb,
> +	0x0649, 0x064a, 0x00ee, 0x00ef,
> +	/* 0xf0*/
> +	0x064b, 0x064c, 0x064d, 0x064e,
> +	0x00f4, 0x064f, 0x0650, 0x00f7,
> +	0x0651, 0x00f9, 0x0652, 0x00fb,
> +	0x00fc, 0x200e, 0x200f, 0x06d2,
> +};
> +
> +static const unsigned char page00[256] = {
> +	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
> +	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
> +	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
> +	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
> +	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
> +	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
> +	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
> +	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
> +	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x40-0x47 */
> +	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x48-0x4f */
> +	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x50-0x57 */
> +	0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
> +	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x60-0x67 */
> +	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x68-0x6f */
> +	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x70-0x77 */
> +	0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
> +
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x80-0x87 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x88-0x8f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x98-0x9f */
> +	0xa0, 0x00, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
> +	0xa8, 0xa9, 0x00, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
> +	0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
> +	0xb8, 0xb9, 0x00, 0xbb, 0xbc, 0xbd, 0xbe, 0x00, /* 0xb8-0xbf */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc0-0xc7 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc8-0xcf */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd7, /* 0xd0-0xd7 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xd8-0xdf */
> +	0xe0, 0x00, 0xe2, 0x00, 0x00, 0x00, 0x00, 0xe7, /* 0xe0-0xe7 */
> +	0xe8, 0xe9, 0xea, 0xeb, 0x00, 0x00, 0xee, 0xef, /* 0xe8-0xef */
> +	0x00, 0x00, 0x00, 0x00, 0xf4, 0x00, 0x00, 0xf7, /* 0xf0-0xf7 */
> +	0x00, 0xf9, 0x00, 0xfb, 0xfc, 0x00, 0x00, 0x00, /* 0xf8-0xff */
> +};
> +
> +static const unsigned char page01[256] = {
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x27 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28-0x2f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30-0x37 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x40-0x47 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x48-0x4f */
> +	0x00, 0x00, 0x8c, 0x9c, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x58-0x5f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x68-0x6f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x78-0x7f */
> +
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x80-0x87 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x88-0x8f */
> +	0x00, 0x00, 0x83, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
> +};
> +
> +static const unsigned char page02[256] = {
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x27 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28-0x2f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30-0x37 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x40-0x47 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x48-0x4f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x58-0x5f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x68-0x6f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x78-0x7f */
> +
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x80-0x87 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x88-0x8f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x98-0x9f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa0-0xa7 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa8-0xaf */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb0-0xb7 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb8-0xbf */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x88, 0x00, /* 0xc0-0xc7 */
> +};
> +
> +static const unsigned char page06[256] = {
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
> +	0x00, 0x00, 0x00, 0x00, 0xa1, 0x00, 0x00, 0x00, /* 0x08-0x0f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
> +	0x00, 0x00, 0x00, 0xba, 0x00, 0x00, 0x00, 0xbf, /* 0x18-0x1f */
> +	0x00, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0x20-0x27 */
> +	0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0x28-0x2f */
> +	0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd8, /* 0x30-0x37 */
> +	0xd9, 0xda, 0xdb, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
> +	0xdc, 0xdd, 0xde, 0xdf, 0xe1, 0xe3, 0xe4, 0xe5, /* 0x40-0x47 */
> +	0xe6, 0xec, 0xed, 0xf0, 0xf1, 0xf2, 0xf3, 0xf5, /* 0x48-0x4f */
> +	0xf6, 0xf8, 0xfa, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x58-0x5f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x68-0x6f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
> +	0x00, 0x8a, 0x00, 0x00, 0x00, 0x00, 0x81, 0x00, /* 0x78-0x7f */
> +
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x8d, 0x00, /* 0x80-0x87 */
> +	0x8f, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x88-0x8f */
> +	0x00, 0x9a, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
> +	0x8e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x98-0x9f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa0-0xa7 */
> +	0x00, 0x98, 0x00, 0x00, 0x00, 0x00, 0x00, 0x90, /* 0xa8-0xaf */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xb0-0xb7 */
> +	0x00, 0x00, 0x9f, 0x00, 0x00, 0x00, 0xaa, 0x00, /* 0xb8-0xbf */
> +	0x00, 0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc0-0xc7 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xc8-0xcf */
> +	0x00, 0x00, 0xff, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xd0-0xd7 */
> +};
> +
> +static const unsigned char page20[256] = {
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
> +	0x00, 0x00, 0x00, 0x00, 0x9d, 0x9e, 0xfd, 0xfe, /* 0x08-0x0f */
> +	0x00, 0x00, 0x00, 0x96, 0x97, 0x00, 0x00, 0x00, /* 0x10-0x17 */
> +	0x91, 0x92, 0x82, 0x00, 0x93, 0x94, 0x84, 0x00, /* 0x18-0x1f */
> +	0x86, 0x87, 0x95, 0x00, 0x00, 0x00, 0x85, 0x00, /* 0x20-0x27 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x28-0x2f */
> +	0x89, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x30-0x37 */
> +	0x00, 0x8b, 0x9b, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x38-0x3f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x40-0x47 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x48-0x4f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x50-0x57 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x58-0x5f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x60-0x67 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x68-0x6f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x70-0x77 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x78-0x7f */
> +
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x80-0x87 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x88-0x8f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x90-0x97 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x98-0x9f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0xa0-0xa7 */
> +	0x00, 0x00, 0x00, 0x00, 0x80, 0x00, 0x00, 0x00, /* 0xa8-0xaf */
> +};
> +
> +static const unsigned char page21[256] = {
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x00-0x07 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x08-0x0f */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x10-0x17 */
> +	0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x18-0x1f */
> +	0x00, 0x00, 0x99, 0x00, 0x00, 0x00, 0x00, 0x00, /* 0x20-0x27 */
> +};
> +
> +static const unsigned char *const page_uni2charset[256] = {
> +	page00, page01, page02, NULL,   NULL,   NULL,   page06, NULL,
> +	NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,
> +	NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,
> +	NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,   NULL,
> +	page20, page21, NULL,   NULL,   NULL,   NULL,   NULL,   NULL,
> +};
> +
> +static const unsigned char charset2lower[256] = {
> +	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
> +	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
> +	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
> +	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
> +	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
> +	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
> +	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
> +	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
> +	0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x40-0x47 */
> +	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x48-0x4f */
> +	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x50-0x57 */
> +	0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
> +	0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67, /* 0x60-0x67 */
> +	0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f, /* 0x68-0x6f */
> +	0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77, /* 0x70-0x77 */
> +	0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
> +
> +	0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 0x80-0x87 */
> +	0x88, 0x89, 0x8a, 0x8b, 0x9c, 0x8d, 0x8e, 0x8f, /* 0x88-0x8f */
> +	0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */
> +	0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */
> +	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
> +	0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
> +	0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
> +	0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */
> +	0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
> +	0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
> +	0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */
> +	0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */
> +	0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
> +	0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */
> +	0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */
> +	0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */
> +};
> +
> +static const unsigned char charset2upper[256] = {
> +	0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, /* 0x00-0x07 */
> +	0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f, /* 0x08-0x0f */
> +	0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17, /* 0x10-0x17 */
> +	0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f, /* 0x18-0x1f */
> +	0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27, /* 0x20-0x27 */
> +	0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f, /* 0x28-0x2f */
> +	0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37, /* 0x30-0x37 */
> +	0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f, /* 0x38-0x3f */
> +	0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x40-0x47 */
> +	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x48-0x4f */
> +	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x50-0x57 */
> +	0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f, /* 0x58-0x5f */
> +	0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47, /* 0x60-0x67 */
> +	0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f, /* 0x68-0x6f */
> +	0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57, /* 0x70-0x77 */
> +	0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f, /* 0x78-0x7f */
> +
> +	0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87, /* 0x80-0x87 */
> +	0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f, /* 0x88-0x8f */
> +	0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97, /* 0x90-0x97 */
> +	0x98, 0x99, 0x9a, 0x9b, 0x8c, 0x9d, 0x9e, 0x9f, /* 0x98-0x9f */
> +	0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7, /* 0xa0-0xa7 */
> +	0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf, /* 0xa8-0xaf */
> +	0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7, /* 0xb0-0xb7 */
> +	0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf, /* 0xb8-0xbf */
> +	0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7, /* 0xc0-0xc7 */
> +	0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf, /* 0xc8-0xcf */
> +	0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7, /* 0xd0-0xd7 */
> +	0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf, /* 0xd8-0xdf */
> +	0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7, /* 0xe0-0xe7 */
> +	0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef, /* 0xe8-0xef */
> +	0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7, /* 0xf0-0xf7 */
> +	0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff, /* 0xf8-0xff */
> +};
> +
> +static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
> +{
> +	const unsigned char *uni2charset;
> +	unsigned char cl = uni & 0x00ff;
> +	unsigned char ch = (uni & 0xff00) >> 8;
> +
> +	if (boundlen <= 0)
> +		return -ENAMETOOLONG;
> +
> +	uni2charset = page_uni2charset[ch];
> +	if (uni2charset && uni2charset[cl])
> +		out[0] = uni2charset[cl];
> +	else
> +		return -EINVAL;
> +	return 1;
> +}
> +
> +static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
> +{
> +	*uni = charset2uni[*rawstring];
> +	if (*uni == 0x0000)
> +		return -EINVAL;
> +	return 1;
> +}
> +
> +static struct nls_table table = {
> +	.charset	= "cp1256",
> +	.uni2char	= uni2char,
> +	.char2uni	= char2uni,
> +	.charset2lower	= charset2lower,
> +	.charset2upper	= charset2upper,
> +};
> +
> +static int __init init_nls_cp1256(void)
> +{
> +	return register_nls(&table);
> +}
> +
> +static void __exit exit_nls_cp1256(void)
> +{
> +	unregister_nls(&table);
> +}
> +
> +module_init(init_nls_cp1256)
> +module_exit(exit_nls_cp1256)
> +
> +MODULE_DESCRIPTION("NLS Windows CP1256 (Arabic)");
> +MODULE_LICENSE("Dual BSD/GPL");

-- 
OGAWA Hirofumi <hirofumi@mail.parknet.co.jp>

^ permalink raw reply	[flat|nested] 6+ messages in thread

end of thread, other threads:[~2026-11-09 12:53 UTC | newest]

Thread overview: 6+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2026-11-08 20:01 [PATCH 0/2] fs/nls: Add Arabic code pages CP720 and CP1256 Fuad Tabba
2026-11-08 20:01 ` [PATCH 1/2] fs/nls: Add codepage 720 (Arabic) Fuad Tabba
2026-11-09 12:51   ` OGAWA Hirofumi
2026-11-09 12:53     ` Fuad Tabba
2026-11-08 20:01 ` [PATCH 2/2] fs/nls: Add Windows codepage 1256 (Arabic) Fuad Tabba
2026-11-09 12:51   ` OGAWA Hirofumi

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