1/*
2 * upcase.c - Generate the full NTFS Unicode upcase table in little endian.
3 *	      Part of the Linux-NTFS project.
4 *
5 * Copyright (c) 2001 Richard Russon <ntfs@flatcap.org>
6 * Copyright (c) 2001-2006 Anton Altaparmakov
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the Free
10 * Software Foundation; either version 2 of the License, or (at your option)
11 * any later version.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program (in the main directory of the Linux-NTFS source
20 * in the file COPYING); if not, write to the Free Software Foundation,
21 * Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
22 */
23
24#include "malloc.h"
25#include "ntfs.h"
26
27ntfschar *generate_default_upcase(void)
28{
29	static const int uc_run_table[][3] = { /* Start, End, Add */
30	{0x0061, 0x007B,  -32}, {0x0451, 0x045D, -80}, {0x1F70, 0x1F72,  74},
31	{0x00E0, 0x00F7,  -32}, {0x045E, 0x0460, -80}, {0x1F72, 0x1F76,  86},
32	{0x00F8, 0x00FF,  -32}, {0x0561, 0x0587, -48}, {0x1F76, 0x1F78, 100},
33	{0x0256, 0x0258, -205}, {0x1F00, 0x1F08,   8}, {0x1F78, 0x1F7A, 128},
34	{0x028A, 0x028C, -217}, {0x1F10, 0x1F16,   8}, {0x1F7A, 0x1F7C, 112},
35	{0x03AC, 0x03AD,  -38}, {0x1F20, 0x1F28,   8}, {0x1F7C, 0x1F7E, 126},
36	{0x03AD, 0x03B0,  -37}, {0x1F30, 0x1F38,   8}, {0x1FB0, 0x1FB2,   8},
37	{0x03B1, 0x03C2,  -32}, {0x1F40, 0x1F46,   8}, {0x1FD0, 0x1FD2,   8},
38	{0x03C2, 0x03C3,  -31}, {0x1F51, 0x1F52,   8}, {0x1FE0, 0x1FE2,   8},
39	{0x03C3, 0x03CC,  -32}, {0x1F53, 0x1F54,   8}, {0x1FE5, 0x1FE6,   7},
40	{0x03CC, 0x03CD,  -64}, {0x1F55, 0x1F56,   8}, {0x2170, 0x2180, -16},
41	{0x03CD, 0x03CF,  -63}, {0x1F57, 0x1F58,   8}, {0x24D0, 0x24EA, -26},
42	{0x0430, 0x0450,  -32}, {0x1F60, 0x1F68,   8}, {0xFF41, 0xFF5B, -32},
43	{0}
44	};
45
46	static const int uc_dup_table[][2] = { /* Start, End */
47	{0x0100, 0x012F}, {0x01A0, 0x01A6}, {0x03E2, 0x03EF}, {0x04CB, 0x04CC},
48	{0x0132, 0x0137}, {0x01B3, 0x01B7}, {0x0460, 0x0481}, {0x04D0, 0x04EB},
49	{0x0139, 0x0149}, {0x01CD, 0x01DD}, {0x0490, 0x04BF}, {0x04EE, 0x04F5},
50	{0x014A, 0x0178}, {0x01DE, 0x01EF}, {0x04BF, 0x04BF}, {0x04F8, 0x04F9},
51	{0x0179, 0x017E}, {0x01F4, 0x01F5}, {0x04C1, 0x04C4}, {0x1E00, 0x1E95},
52	{0x018B, 0x018B}, {0x01FA, 0x0218}, {0x04C7, 0x04C8}, {0x1EA0, 0x1EF9},
53	{0}
54	};
55
56	static const int uc_word_table[][2] = { /* Offset, Value */
57	{0x00FF, 0x0178}, {0x01AD, 0x01AC}, {0x01F3, 0x01F1}, {0x0269, 0x0196},
58	{0x0183, 0x0182}, {0x01B0, 0x01AF}, {0x0253, 0x0181}, {0x026F, 0x019C},
59	{0x0185, 0x0184}, {0x01B9, 0x01B8}, {0x0254, 0x0186}, {0x0272, 0x019D},
60	{0x0188, 0x0187}, {0x01BD, 0x01BC}, {0x0259, 0x018F}, {0x0275, 0x019F},
61	{0x018C, 0x018B}, {0x01C6, 0x01C4}, {0x025B, 0x0190}, {0x0283, 0x01A9},
62	{0x0192, 0x0191}, {0x01C9, 0x01C7}, {0x0260, 0x0193}, {0x0288, 0x01AE},
63	{0x0199, 0x0198}, {0x01CC, 0x01CA}, {0x0263, 0x0194}, {0x0292, 0x01B7},
64	{0x01A8, 0x01A7}, {0x01DD, 0x018E}, {0x0268, 0x0197},
65	{0}
66	};
67
68	int i, r;
69	ntfschar *uc;
70
71	uc = ntfs_malloc_nofs(default_upcase_len * sizeof(ntfschar));
72	if (!uc)
73		return uc;
74	memset(uc, 0, default_upcase_len * sizeof(ntfschar));
75	/* Generate the little endian Unicode upcase table used by ntfs. */
76	for (i = 0; i < default_upcase_len; i++)
77		uc[i] = cpu_to_le16(i);
78	for (r = 0; uc_run_table[r][0]; r++)
79		for (i = uc_run_table[r][0]; i < uc_run_table[r][1]; i++)
80			uc[i] = cpu_to_le16(le16_to_cpu(uc[i]) +
81					uc_run_table[r][2]);
82	for (r = 0; uc_dup_table[r][0]; r++)
83		for (i = uc_dup_table[r][0]; i < uc_dup_table[r][1]; i += 2)
84			uc[i + 1] = cpu_to_le16(le16_to_cpu(uc[i + 1]) - 1);
85	for (r = 0; uc_word_table[r][0]; r++)
86		uc[uc_word_table[r][0]] = cpu_to_le16(uc_word_table[r][1]);
87	return uc;
88}
89