root/fs/ntfs/upcase.c

DEFINITIONS

1. generate_default_upcase

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * upcase.c - Generate the full NTFS Unicode upcase table in little endian.
   4  *            Part of the Linux-NTFS project.
   5  *
   6  * Copyright (c) 2001 Richard Russon <ntfs@flatcap.org>
   7  * Copyright (c) 2001-2006 Anton Altaparmakov
   8  */
   9 
  10 #include "malloc.h"
  11 #include "ntfs.h"
  12 
  13 ntfschar *generate_default_upcase(void)
  14 {
  15         static const int uc_run_table[][3] = { /* Start, End, Add */
  16         {0x0061, 0x007B,  -32}, {0x0451, 0x045D, -80}, {0x1F70, 0x1F72,  74},
  17         {0x00E0, 0x00F7,  -32}, {0x045E, 0x0460, -80}, {0x1F72, 0x1F76,  86},
  18         {0x00F8, 0x00FF,  -32}, {0x0561, 0x0587, -48}, {0x1F76, 0x1F78, 100},
  19         {0x0256, 0x0258, -205}, {0x1F00, 0x1F08,   8}, {0x1F78, 0x1F7A, 128},
  20         {0x028A, 0x028C, -217}, {0x1F10, 0x1F16,   8}, {0x1F7A, 0x1F7C, 112},
  21         {0x03AC, 0x03AD,  -38}, {0x1F20, 0x1F28,   8}, {0x1F7C, 0x1F7E, 126},
  22         {0x03AD, 0x03B0,  -37}, {0x1F30, 0x1F38,   8}, {0x1FB0, 0x1FB2,   8},
  23         {0x03B1, 0x03C2,  -32}, {0x1F40, 0x1F46,   8}, {0x1FD0, 0x1FD2,   8},
  24         {0x03C2, 0x03C3,  -31}, {0x1F51, 0x1F52,   8}, {0x1FE0, 0x1FE2,   8},
  25         {0x03C3, 0x03CC,  -32}, {0x1F53, 0x1F54,   8}, {0x1FE5, 0x1FE6,   7},
  26         {0x03CC, 0x03CD,  -64}, {0x1F55, 0x1F56,   8}, {0x2170, 0x2180, -16},
  27         {0x03CD, 0x03CF,  -63}, {0x1F57, 0x1F58,   8}, {0x24D0, 0x24EA, -26},
  28         {0x0430, 0x0450,  -32}, {0x1F60, 0x1F68,   8}, {0xFF41, 0xFF5B, -32},
  29         {0}
  30         };
  31 
  32         static const int uc_dup_table[][2] = { /* Start, End */
  33         {0x0100, 0x012F}, {0x01A0, 0x01A6}, {0x03E2, 0x03EF}, {0x04CB, 0x04CC},
  34         {0x0132, 0x0137}, {0x01B3, 0x01B7}, {0x0460, 0x0481}, {0x04D0, 0x04EB},
  35         {0x0139, 0x0149}, {0x01CD, 0x01DD}, {0x0490, 0x04BF}, {0x04EE, 0x04F5},
  36         {0x014A, 0x0178}, {0x01DE, 0x01EF}, {0x04BF, 0x04BF}, {0x04F8, 0x04F9},
  37         {0x0179, 0x017E}, {0x01F4, 0x01F5}, {0x04C1, 0x04C4}, {0x1E00, 0x1E95},
  38         {0x018B, 0x018B}, {0x01FA, 0x0218}, {0x04C7, 0x04C8}, {0x1EA0, 0x1EF9},
  39         {0}
  40         };
  41 
  42         static const int uc_word_table[][2] = { /* Offset, Value */
  43         {0x00FF, 0x0178}, {0x01AD, 0x01AC}, {0x01F3, 0x01F1}, {0x0269, 0x0196},
  44         {0x0183, 0x0182}, {0x01B0, 0x01AF}, {0x0253, 0x0181}, {0x026F, 0x019C},
  45         {0x0185, 0x0184}, {0x01B9, 0x01B8}, {0x0254, 0x0186}, {0x0272, 0x019D},
  46         {0x0188, 0x0187}, {0x01BD, 0x01BC}, {0x0259, 0x018F}, {0x0275, 0x019F},
  47         {0x018C, 0x018B}, {0x01C6, 0x01C4}, {0x025B, 0x0190}, {0x0283, 0x01A9},
  48         {0x0192, 0x0191}, {0x01C9, 0x01C7}, {0x0260, 0x0193}, {0x0288, 0x01AE},
  49         {0x0199, 0x0198}, {0x01CC, 0x01CA}, {0x0263, 0x0194}, {0x0292, 0x01B7},
  50         {0x01A8, 0x01A7}, {0x01DD, 0x018E}, {0x0268, 0x0197},
  51         {0}
  52         };
  53 
  54         int i, r;
  55         ntfschar *uc;
  56 
  57         uc = ntfs_malloc_nofs(default_upcase_len * sizeof(ntfschar));
  58         if (!uc)
  59                 return uc;
  60         memset(uc, 0, default_upcase_len * sizeof(ntfschar));
  61         /* Generate the little endian Unicode upcase table used by ntfs. */
  62         for (i = 0; i < default_upcase_len; i++)
  63                 uc[i] = cpu_to_le16(i);
  64         for (r = 0; uc_run_table[r][0]; r++)
  65                 for (i = uc_run_table[r][0]; i < uc_run_table[r][1]; i++)
  66                         le16_add_cpu(&uc[i], uc_run_table[r][2]);
  67         for (r = 0; uc_dup_table[r][0]; r++)
  68                 for (i = uc_dup_table[r][0]; i < uc_dup_table[r][1]; i += 2)
  69                         le16_add_cpu(&uc[i + 1], -1);
  70         for (r = 0; uc_word_table[r][0]; r++)
  71                 uc[uc_word_table[r][0]] = cpu_to_le16(uc_word_table[r][1]);
  72         return uc;
  73 }