fs/nls/nls_euc-jp.c

   1 /*
   2  * linux/fs/nls/nls_euc-jp.c
   3  *
   4  * Added `OSF/JVC Recommended Code Set Conversion Specification
   5  * between Japanese EUC and Shift-JIS' support: <hirofumi@mail.parknet.co.jp>
   6  * (http://www.opengroup.or.jp/jvc/cde/sjis-euc-e.html)
   7  */
   8
   9 #include <linux/module.h>
  10 #include <linux/kernel.h>
  11 #include <linux/string.h>
  12 #include <linux/nls.h>
  13 #include <linux/errno.h>
  14
  15 static struct nls_table *p_nls;
  16
  17 #define IS_SJIS_LOW_BYTE(l)     ((0x40 <= (l)) && ((l) <= 0xFC) && ((l) != 0x7F))
  18 /* JIS X 0208 (include NEC spesial characters) */
  19 #define IS_SJIS_JISX0208(h, l)  ((((0x81 <= (h)) && ((h) <= 0x9F))      \
  20                                  || ((0xE0 <= (h)) && ((h) <= 0xEA)))   \
  21                                  && IS_SJIS_LOW_BYTE(l))
  22 #define IS_SJIS_JISX0201KANA(c) ((0xA1 <= (c)) && ((c) <= 0xDF))
  23 #define IS_SJIS_UDC_LOW(h, l)   (((0xF0 <= (h)) && ((h) <= 0xF4))       \
  24                                  && IS_SJIS_LOW_BYTE(l))
  25 #define IS_SJIS_UDC_HI(h, l)    (((0xF5 <= (h)) && ((h) <= 0xF9))       \
  26                                  && IS_SJIS_LOW_BYTE(l))
  27 #define IS_SJIS_IBM(h, l)       (((0xFA <= (h)) && ((h) <= 0xFC))       \
  28                                  && IS_SJIS_LOW_BYTE(l))
  29 #define IS_SJIS_NECIBM(h, l)    (((0xED <= (h)) && ((h) <= 0xEE))       \
  30                                  && IS_SJIS_LOW_BYTE(l))
  31 #define MAP_SJIS2EUC(sjis_hi, sjis_lo, sjis_p, euc_hi, euc_lo, euc_p) {         \
  32         if ((sjis_lo) >= 0x9F) {                                                \
  33                 (euc_hi) = (sjis_hi) * 2 - (((sjis_p) * 2 - (euc_p)) - 1);      \
  34                 (euc_lo) = (sjis_lo) + 2;                                       \
  35         } else {                                                                \
  36                 (euc_hi) = (sjis_hi) * 2 - ((sjis_p) * 2 - (euc_p));            \
  37                 (euc_lo) = (sjis_lo) + ((sjis_lo) >= 0x7F ? 0x60 : 0x61);       \
  38         }                                                                       \
  39 } while(0)
  40
  41 #define SS2             (0x8E)          /* Single Shift 2 */
  42 #define SS3             (0x8F)          /* Single Shift 3 */
  43 #define IS_EUC_BYTE(c)          ((0xA1 <= (c)) && ((c) <= 0xFE))
  44 #define IS_EUC_JISX0208(h, l)   (IS_EUC_BYTE(h) && IS_EUC_BYTE(l))
  45 #define IS_EUC_JISX0201KANA(h, l)       (((h) == SS2) && (0xA1 <= (l) && (l) <= 0xDF))
  46 #define IS_EUC_UDC_LOW(h, l)    (((0xF5 <= (h)) && ((h) <= 0xFE))       \
  47                                  && IS_EUC_BYTE(l))
  48 #define IS_EUC_UDC_HI(h, l)     IS_EUC_UDC_LOW(h, l) /* G3 block */
  49 #define MAP_EUC2SJIS(euc_hi, euc_lo, euc_p, sjis_hi, sjis_lo, sjis_p) {         \
  50         if ((euc_hi) & 1) {                                                     \
  51                 (sjis_hi) = (euc_hi) / 2 + ((sjis_p) - (euc_p) / 2);            \
  52                 (sjis_lo) = (euc_lo) - ((euc_lo) >= 0xE0 ? 0x60 : 0x61);        \
  53         } else {                                                                \
  54                 (sjis_hi) = (euc_hi) / 2 + (((sjis_p) - (euc_p) / 2) - 1);      \
  55                 (sjis_lo) = (euc_lo) - 2;                                       \
  56         }                                                                       \
  57 } while(0)
  58
  59 /* SJIS IBM extended characters to EUC map */
  60 static unsigned char sjisibm2euc_map[][2] = {
  61         {0xF3, 0xF3}, {0xF3, 0xF4}, {0xF3, 0xF5}, {0xF3, 0xF6}, {0xF3, 0xF7},
  62         {0xF3, 0xF8}, {0xF3, 0xF9}, {0xF3, 0xFA}, {0xF3, 0xFB}, {0xF3, 0xFC},
  63         {0xF3, 0xFD}, {0xF3, 0xFE}, {0xF4, 0xA1}, {0xF4, 0xA2}, {0xF4, 0xA3},
  64         {0xF4, 0xA4}, {0xF4, 0xA5}, {0xF4, 0xA6}, {0xF4, 0xA7}, {0xF4, 0xA8},
  65         {0xA2, 0xCC}, {0xA2, 0xC3}, {0xF4, 0xA9}, {0xF4, 0xAA}, {0xF4, 0xAB},
  66         {0xF4, 0xAC}, {0xF4, 0xAD}, {0xA2, 0xE8}, {0xD4, 0xE3}, {0xDC, 0xDF},
  67         {0xE4, 0xE9}, {0xE3, 0xF8}, {0xD9, 0xA1}, {0xB1, 0xBB}, {0xF4, 0xAE},
  68         {0xC2, 0xAD}, {0xC3, 0xFC}, {0xE4, 0xD0}, {0xC2, 0xBF}, {0xBC, 0xF4},
  69         {0xB0, 0xA9}, {0xB0, 0xC8}, {0xF4, 0xAF}, {0xB0, 0xD2}, {0xB0, 0xD4},
  70         {0xB0, 0xE3}, {0xB0, 0xEE}, {0xB1, 0xA7}, {0xB1, 0xA3}, {0xB1, 0xAC},
  71         {0xB1, 0xA9}, {0xB1, 0xBE}, {0xB1, 0xDF}, {0xB1, 0xD8}, {0xB1, 0xC8},
  72         {0xB1, 0xD7}, {0xB1, 0xE3}, {0xB1, 0xF4}, {0xB1, 0xE1}, {0xB2, 0xA3},
  73         {0xF4, 0xB0}, {0xB2, 0xBB}, {0xB2, 0xE6}, {0x00, 0x00}, {0xB2, 0xED},
  74         {0xB2, 0xF5}, {0xB2, 0xFC}, {0xF4, 0xB1}, {0xB3, 0xB5}, {0xB3, 0xD8},
  75         {0xB3, 0xDB}, {0xB3, 0xE5}, {0xB3, 0xEE}, {0xB3, 0xFB}, {0xF4, 0xB2},
  76         {0xF4, 0xB3}, {0xB4, 0xC0}, {0xB4, 0xC7}, {0xB4, 0xD0}, {0xB4, 0xDE},
  77         {0xF4, 0xB4}, {0xB5, 0xAA}, {0xF4, 0xB5}, {0xB5, 0xAF}, {0xB5, 0xC4},
  78         {0xB5, 0xE8}, {0xF4, 0xB6}, {0xB7, 0xC2}, {0xB7, 0xE4}, {0xB7, 0xE8},
  79         {0xB7, 0xE7}, {0xF4, 0xB7}, {0xF4, 0xB8}, {0xF4, 0xB9}, {0xB8, 0xCE},
  80         {0xB8, 0xE1}, {0xB8, 0xF5}, {0xB8, 0xF7}, {0xB8, 0xF8}, {0xB8, 0xFC},
  81         {0xB9, 0xAF}, {0xB9, 0xB7}, {0xBA, 0xBE}, {0xBA, 0xDB}, {0xCD, 0xAA},
  82         {0xBA, 0xE1}, {0xF4, 0xBA}, {0xBA, 0xEB}, {0xBB, 0xB3}, {0xBB, 0xB8},
  83         {0xF4, 0xBB}, {0xBB, 0xCA}, {0xF4, 0xBC}, {0xF4, 0xBD}, {0xBB, 0xD0},
  84         {0xBB, 0xDE}, {0xBB, 0xF4}, {0xBB, 0xF5}, {0xBB, 0xF9}, {0xBC, 0xE4},
  85         {0xBC, 0xED}, {0xBC, 0xFE}, {0xF4, 0xBE}, {0xBD, 0xC2}, {0xBD, 0xE7},
  86         {0xF4, 0xBF}, {0xBD, 0xF0}, {0xBE, 0xB0}, {0xBE, 0xAC}, {0xF4, 0xC0},
  87         {0xBE, 0xB3}, {0xBE, 0xBD}, {0xBE, 0xCD}, {0xBE, 0xC9}, {0xBE, 0xE4},
  88         {0xBF, 0xA8}, {0xBF, 0xC9}, {0xC0, 0xC4}, {0xC0, 0xE4}, {0xC0, 0xF4},
  89         {0xC1, 0xA6}, {0xF4, 0xC1}, {0xC1, 0xF5}, {0xC1, 0xFC}, {0xF4, 0xC2},
  90         {0xC1, 0xF8}, {0xC2, 0xAB}, {0xC2, 0xA1}, {0xC2, 0xA5}, {0xF4, 0xC3},
  91         {0xC2, 0xB8}, {0xC2, 0xBA}, {0xF4, 0xC4}, {0xC2, 0xC4}, {0xC2, 0xD2},
  92         {0xC2, 0xD7}, {0xC2, 0xDB}, {0xC2, 0xDE}, {0xC2, 0xED}, {0xC2, 0xF0},
  93         {0xF4, 0xC5}, {0xC3, 0xA1}, {0xC3, 0xB5}, {0xC3, 0xC9}, {0xC3, 0xB9},
  94         {0xF4, 0xC6}, {0xC3, 0xD8}, {0xC3, 0xFE}, {0xF4, 0xC7}, {0xC4, 0xCC},
  95         {0xF4, 0xC8}, {0xC4, 0xD9}, {0xC4, 0xEA}, {0xC4, 0xFD}, {0xF4, 0xC9},
  96         {0xC5, 0xA7}, {0xC5, 0xB5}, {0xC5, 0xB6}, {0xF4, 0xCA}, {0xC5, 0xD5},
  97         {0xC6, 0xB8}, {0xC6, 0xD7}, {0xC6, 0xE0}, {0xC6, 0xEA}, {0xC6, 0xE3},
  98         {0xC7, 0xA1}, {0xC7, 0xAB}, {0xC7, 0xC7}, {0xC7, 0xC3}, {0xC7, 0xCB},
  99         {0xC7, 0xCF}, {0xC7, 0xD9}, {0xF4, 0xCB}, {0xF4, 0xCC}, {0xC7, 0xE6},
 100         {0xC7, 0xEE}, {0xC7, 0xFC}, {0xC7, 0xEB}, {0xC7, 0xF0}, {0xC8, 0xB1},
 101         {0xC8, 0xE5}, {0xC8, 0xF8}, {0xC9, 0xA6}, {0xC9, 0xAB}, {0xC9, 0xAD},
 102         {0xF4, 0xCD}, {0xC9, 0xCA}, {0xC9, 0xD3}, {0xC9, 0xE9}, {0xC9, 0xE3},
 103         {0xC9, 0xFC}, {0xC9, 0xF4}, {0xC9, 0xF5}, {0xF4, 0xCE}, {0xCA, 0xB3},
 104         {0xCA, 0xBD}, {0xCA, 0xEF}, {0xCA, 0xF1}, {0xCB, 0xAE}, {0xF4, 0xCF},
 105         {0xCB, 0xCA}, {0xCB, 0xE6}, {0xCB, 0xEA}, {0xCB, 0xF0}, {0xCB, 0xF4},
 106         {0xCB, 0xEE}, {0xCC, 0xA5}, {0xCB, 0xF9}, {0xCC, 0xAB}, {0xCC, 0xAE},
 107         {0xCC, 0xAD}, {0xCC, 0xB2}, {0xCC, 0xC2}, {0xCC, 0xD0}, {0xCC, 0xD9},
 108         {0xF4, 0xD0}, {0xCD, 0xBB}, {0xF4, 0xD1}, {0xCE, 0xBB}, {0xF4, 0xD2},
 109         {0xCE, 0xBA}, {0xCE, 0xC3}, {0xF4, 0xD3}, {0xCE, 0xF2}, {0xB3, 0xDD},
 110         {0xCF, 0xD5}, {0xCF, 0xE2}, {0xCF, 0xE9}, {0xCF, 0xED}, {0xF4, 0xD4},
 111         {0xF4, 0xD5}, {0xF4, 0xD6}, {0x00, 0x00}, {0xF4, 0xD7}, {0xD0, 0xE5},
 112         {0xF4, 0xD8}, {0xD0, 0xE9}, {0xD1, 0xE8}, {0xF4, 0xD9}, {0xF4, 0xDA},
 113         {0xD1, 0xEC}, {0xD2, 0xBB}, {0xF4, 0xDB}, {0xD3, 0xE1}, {0xD3, 0xE8},
 114         {0xD4, 0xA7}, {0xF4, 0xDC}, {0xF4, 0xDD}, {0xD4, 0xD4}, {0xD4, 0xF2},
 115         {0xD5, 0xAE}, {0xF4, 0xDE}, {0xD7, 0xDE}, {0xF4, 0xDF}, {0xD8, 0xA2},
 116         {0xD8, 0xB7}, {0xD8, 0xC1}, {0xD8, 0xD1}, {0xD8, 0xF4}, {0xD9, 0xC6},
 117         {0xD9, 0xC8}, {0xD9, 0xD1}, {0xF4, 0xE0}, {0xF4, 0xE1}, {0xF4, 0xE2},
 118         {0xF4, 0xE3}, {0xF4, 0xE4}, {0xDC, 0xD3}, {0xDD, 0xC8}, {0xDD, 0xD4},
 119         {0xDD, 0xEA}, {0xDD, 0xFA}, {0xDE, 0xA4}, {0xDE, 0xB0}, {0xF4, 0xE5},
 120         {0xDE, 0xB5}, {0xDE, 0xCB}, {0xF4, 0xE6}, {0xDF, 0xB9}, {0xF4, 0xE7},
 121         {0xDF, 0xC3}, {0xF4, 0xE8}, {0xF4, 0xE9}, {0xE0, 0xD9}, {0xF4, 0xEA},
 122         {0xF4, 0xEB}, {0xE1, 0xE2}, {0xF4, 0xEC}, {0xF4, 0xED}, {0xF4, 0xEE},
 123         {0xE2, 0xC7}, {0xE3, 0xA8}, {0xE3, 0xA6}, {0xE3, 0xA9}, {0xE3, 0xAF},
 124         {0xE3, 0xB0}, {0xE3, 0xAA}, {0xE3, 0xAB}, {0xE3, 0xBC}, {0xE3, 0xC1},
 125         {0xE3, 0xBF}, {0xE3, 0xD5}, {0xE3, 0xD8}, {0xE3, 0xD6}, {0xE3, 0xDF},
 126         {0xE3, 0xE3}, {0xE3, 0xE1}, {0xE3, 0xD4}, {0xE3, 0xE9}, {0xE4, 0xA6},
 127         {0xE3, 0xF1}, {0xE3, 0xF2}, {0xE4, 0xCB}, {0xE4, 0xC1}, {0xE4, 0xC3},
 128         {0xE4, 0xBE}, {0xF4, 0xEF}, {0xE4, 0xC0}, {0xE4, 0xC7}, {0xE4, 0xBF},
 129         {0xE4, 0xE0}, {0xE4, 0xDE}, {0xE4, 0xD1}, {0xF4, 0xF0}, {0xE4, 0xDC},
 130         {0xE4, 0xD2}, {0xE4, 0xDB}, {0xE4, 0xD4}, {0xE4, 0xFA}, {0xE4, 0xEF},
 131         {0xE5, 0xB3}, {0xE5, 0xBF}, {0xE5, 0xC9}, {0xE5, 0xD0}, {0xE5, 0xE2},
 132         {0xE5, 0xEA}, {0xE5, 0xEB}, {0xF4, 0xF1}, {0xF4, 0xF2}, {0xF4, 0xF3},
 133         {0xE6, 0xE8}, {0xE6, 0xEF}, {0xE7, 0xAC}, {0xF4, 0xF4}, {0xE7, 0xAE},
 134         {0xF4, 0xF5}, {0xE7, 0xB1}, {0xF4, 0xF6}, {0xE7, 0xB2}, {0xE8, 0xB1},
 135         {0xE8, 0xB6}, {0xF4, 0xF7}, {0xF4, 0xF8}, {0xE8, 0xDD}, {0xF4, 0xF9},
 136         {0xF4, 0xFA}, {0xE9, 0xD1}, {0xF4, 0xFB}, {0xE9, 0xED}, {0xEA, 0xCD},
 137         {0xF4, 0xFC}, {0xEA, 0xDB}, {0xEA, 0xE6}, {0xEA, 0xEA}, {0xEB, 0xA5},
 138         {0xEB, 0xFB}, {0xEB, 0xFA}, {0xF4, 0xFD}, {0xEC, 0xD6}, {0xF4, 0xFE},
 139 };
 140
 141 #define IS_EUC_IBM2JISX0208(h, l) \
 142                 (((h) == 0xA2 && (l) == 0xCC) || ((h) == 0xA2 && (l) == 0xE8))
 143
 144 /* EUC to SJIS IBM extended characters map (G3 JIS X 0212 block) */
 145 static struct {
 146         unsigned short euc;
 147         unsigned char sjis[2];
 148 } euc2sjisibm_jisx0212_map[] = {
 149         {0xA2C3, {0xFA, 0x55}}, {0xB0A9, {0xFA, 0x68}}, {0xB0C8, {0xFA, 0x69}},
 150         {0xB0D2, {0xFA, 0x6B}}, {0xB0D4, {0xFA, 0x6C}}, {0xB0E3, {0xFA, 0x6D}},
 151         {0xB0EE, {0xFA, 0x6E}}, {0xB1A3, {0xFA, 0x70}}, {0xB1A7, {0xFA, 0x6F}},
 152         {0xB1A9, {0xFA, 0x72}}, {0xB1AC, {0xFA, 0x71}}, {0xB1BB, {0xFA, 0x61}},
 153         {0xB1BE, {0xFA, 0x73}}, {0xB1C8, {0xFA, 0x76}}, {0xB1D7, {0xFA, 0x77}},
 154         {0xB1D8, {0xFA, 0x75}}, {0xB1DF, {0xFA, 0x74}}, {0xB1E1, {0xFA, 0x7A}},
 155         {0xB1E3, {0xFA, 0x78}}, {0xB1F4, {0xFA, 0x79}}, {0xB2A3, {0xFA, 0x7B}},
 156         {0xB2BB, {0xFA, 0x7D}}, {0xB2E6, {0xFA, 0x7E}}, {0xB2ED, {0xFA, 0x80}},
 157         {0xB2F5, {0xFA, 0x81}}, {0xB2FC, {0xFA, 0x82}}, {0xB3B5, {0xFA, 0x84}},
 158         {0xB3D8, {0xFA, 0x85}}, {0xB3DB, {0xFA, 0x86}}, {0xB3DD, {0xFB, 0x77}},
 159         {0xB3E5, {0xFA, 0x87}}, {0xB3EE, {0xFA, 0x88}}, {0xB3FB, {0xFA, 0x89}},
 160         {0xB4C0, {0xFA, 0x8C}}, {0xB4C7, {0xFA, 0x8D}}, {0xB4D0, {0xFA, 0x8E}},
 161         {0xB4DE, {0xFA, 0x8F}}, {0xB5AA, {0xFA, 0x91}}, {0xB5AF, {0xFA, 0x93}},
 162         {0xB5C4, {0xFA, 0x94}}, {0xB5E8, {0xFA, 0x95}}, {0xB7C2, {0xFA, 0x97}},
 163         {0xB7E4, {0xFA, 0x98}}, {0xB7E7, {0xFA, 0x9A}}, {0xB7E8, {0xFA, 0x99}},
 164         {0xB8CE, {0xFA, 0x9E}}, {0xB8E1, {0xFA, 0x9F}}, {0xB8F5, {0xFA, 0xA0}},
 165         {0xB8F7, {0xFA, 0xA1}}, {0xB8F8, {0xFA, 0xA2}}, {0xB8FC, {0xFA, 0xA3}},
 166         {0xB9AF, {0xFA, 0xA4}}, {0xB9B7, {0xFA, 0xA5}}, {0xBABE, {0xFA, 0xA6}},
 167         {0xBADB, {0xFA, 0xA7}}, {0xBAE1, {0xFA, 0xA9}}, {0xBAEB, {0xFA, 0xAB}},
 168         {0xBBB3, {0xFA, 0xAC}}, {0xBBB8, {0xFA, 0xAD}}, {0xBBCA, {0xFA, 0xAF}},
 169         {0xBBD0, {0xFA, 0xB2}}, {0xBBDE, {0xFA, 0xB3}}, {0xBBF4, {0xFA, 0xB4}},
 170         {0xBBF5, {0xFA, 0xB5}}, {0xBBF9, {0xFA, 0xB6}}, {0xBCE4, {0xFA, 0xB7}},
 171         {0xBCED, {0xFA, 0xB8}}, {0xBCF4, {0xFA, 0x67}}, {0xBCFE, {0xFA, 0xB9}},
 172         {0xBDC2, {0xFA, 0xBB}}, {0xBDE7, {0xFA, 0xBC}}, {0xBDF0, {0xFA, 0xBE}},
 173         {0xBEAC, {0xFA, 0xC0}}, {0xBEB0, {0xFA, 0xBF}}, {0xBEB3, {0xFA, 0xC2}},
 174         {0xBEBD, {0xFA, 0xC3}}, {0xBEC9, {0xFA, 0xC5}}, {0xBECD, {0xFA, 0xC4}},
 175         {0xBEE4, {0xFA, 0xC6}}, {0xBFA8, {0xFA, 0xC7}}, {0xBFC9, {0xFA, 0xC8}},
 176         {0xC0C4, {0xFA, 0xC9}}, {0xC0E4, {0xFA, 0xCA}}, {0xC0F4, {0xFA, 0xCB}},
 177         {0xC1A6, {0xFA, 0xCC}}, {0xC1F5, {0xFA, 0xCE}}, {0xC1F8, {0xFA, 0xD1}},
 178         {0xC1FC, {0xFA, 0xCF}}, {0xC2A1, {0xFA, 0xD3}}, {0xC2A5, {0xFA, 0xD4}},
 179         {0xC2AB, {0xFA, 0xD2}}, {0xC2AD, {0xFA, 0x63}}, {0xC2B8, {0xFA, 0xD6}},
 180         {0xC2BA, {0xFA, 0xD7}}, {0xC2BF, {0xFA, 0x66}}, {0xC2C4, {0xFA, 0xD9}},
 181         {0xC2D2, {0xFA, 0xDA}}, {0xC2D7, {0xFA, 0xDB}}, {0xC2DB, {0xFA, 0xDC}},
 182         {0xC2DE, {0xFA, 0xDD}}, {0xC2ED, {0xFA, 0xDE}}, {0xC2F0, {0xFA, 0xDF}},
 183         {0xC3A1, {0xFA, 0xE1}}, {0xC3B5, {0xFA, 0xE2}}, {0xC3B9, {0xFA, 0xE4}},
 184         {0xC3C9, {0xFA, 0xE3}}, {0xC3D8, {0xFA, 0xE6}}, {0xC3FC, {0xFA, 0x64}},
 185         {0xC3FE, {0xFA, 0xE7}}, {0xC4CC, {0xFA, 0xE9}}, {0xC4D9, {0xFA, 0xEB}},
 186         {0xC4EA, {0xFA, 0xEC}}, {0xC4FD, {0xFA, 0xED}}, {0xC5A7, {0xFA, 0xEF}},
 187         {0xC5B5, {0xFA, 0xF0}}, {0xC5B6, {0xFA, 0xF1}}, {0xC5D5, {0xFA, 0xF3}},
 188         {0xC6B8, {0xFA, 0xF4}}, {0xC6D7, {0xFA, 0xF5}}, {0xC6E0, {0xFA, 0xF6}},
 189         {0xC6E3, {0xFA, 0xF8}}, {0xC6EA, {0xFA, 0xF7}}, {0xC7A1, {0xFA, 0xF9}},
 190         {0xC7AB, {0xFA, 0xFA}}, {0xC7C3, {0xFA, 0xFC}}, {0xC7C7, {0xFA, 0xFB}},
 191         {0xC7CB, {0xFB, 0x40}}, {0xC7CF, {0xFB, 0x41}}, {0xC7D9, {0xFB, 0x42}},
 192         {0xC7E6, {0xFB, 0x45}}, {0xC7EB, {0xFB, 0x48}}, {0xC7EE, {0xFB, 0x46}},
 193         {0xC7F0, {0xFB, 0x49}}, {0xC7FC, {0xFB, 0x47}}, {0xC8B1, {0xFB, 0x4A}},
 194         {0xC8E5, {0xFB, 0x4B}}, {0xC8F8, {0xFB, 0x4C}}, {0xC9A6, {0xFB, 0x4D}},
 195         {0xC9AB, {0xFB, 0x4E}}, {0xC9AD, {0xFB, 0x4F}}, {0xC9CA, {0xFB, 0x51}},
 196         {0xC9D3, {0xFB, 0x52}}, {0xC9E3, {0xFB, 0x54}}, {0xC9E9, {0xFB, 0x53}},
 197         {0xC9F4, {0xFB, 0x56}}, {0xC9F5, {0xFB, 0x57}}, {0xC9FC, {0xFB, 0x55}},
 198         {0xCAB3, {0xFB, 0x59}}, {0xCABD, {0xFB, 0x5A}}, {0xCAEF, {0xFB, 0x5B}},
 199         {0xCAF1, {0xFB, 0x5C}}, {0xCBAE, {0xFB, 0x5D}}, {0xCBCA, {0xFB, 0x5F}},
 200         {0xCBE6, {0xFB, 0x60}}, {0xCBEA, {0xFB, 0x61}}, {0xCBEE, {0xFB, 0x64}},
 201         {0xCBF0, {0xFB, 0x62}}, {0xCBF4, {0xFB, 0x63}}, {0xCBF9, {0xFB, 0x66}},
 202         {0xCCA5, {0xFB, 0x65}}, {0xCCAB, {0xFB, 0x67}}, {0xCCAD, {0xFB, 0x69}},
 203         {0xCCAE, {0xFB, 0x68}}, {0xCCB2, {0xFB, 0x6A}}, {0xCCC2, {0xFB, 0x6B}},
 204         {0xCCD0, {0xFB, 0x6C}}, {0xCCD9, {0xFB, 0x6D}}, {0xCDAA, {0xFA, 0xA8}},
 205         {0xCDBB, {0xFB, 0x6F}}, {0xCEBA, {0xFB, 0x73}}, {0xCEBB, {0xFB, 0x71}},
 206         {0xCEC3, {0xFB, 0x74}}, {0xCEF2, {0xFB, 0x76}}, {0xCFD5, {0xFB, 0x78}},
 207         {0xCFE2, {0xFB, 0x79}}, {0xCFE9, {0xFB, 0x7A}}, {0xCFED, {0xFB, 0x7B}},
 208         {0xD0E5, {0xFB, 0x81}}, {0xD0E9, {0xFB, 0x83}}, {0xD1E8, {0xFB, 0x84}},
 209         {0xD1EC, {0xFB, 0x87}}, {0xD2BB, {0xFB, 0x88}}, {0xD3E1, {0xFB, 0x8A}},
 210         {0xD3E8, {0xFB, 0x8B}}, {0xD4A7, {0xFB, 0x8C}}, {0xD4D4, {0xFB, 0x8F}},
 211         {0xD4E3, {0xFA, 0x5C}}, {0xD4F2, {0xFB, 0x90}}, {0xD5AE, {0xFB, 0x91}},
 212         {0xD7DE, {0xFB, 0x93}}, {0xD8A2, {0xFB, 0x95}}, {0xD8B7, {0xFB, 0x96}},
 213         {0xD8C1, {0xFB, 0x97}}, {0xD8D1, {0xFB, 0x98}}, {0xD8F4, {0xFB, 0x99}},
 214         {0xD9A1, {0xFA, 0x60}}, {0xD9C6, {0xFB, 0x9A}}, {0xD9C8, {0xFB, 0x9B}},
 215         {0xD9D1, {0xFB, 0x9C}}, {0xDCD3, {0xFB, 0xA2}}, {0xDCDF, {0xFA, 0x5D}},
 216         {0xDDC8, {0xFB, 0xA3}}, {0xDDD4, {0xFB, 0xA4}}, {0xDDEA, {0xFB, 0xA5}},
 217         {0xDDFA, {0xFB, 0xA6}}, {0xDEA4, {0xFB, 0xA7}}, {0xDEB0, {0xFB, 0xA8}},
 218         {0xDEB5, {0xFB, 0xAA}}, {0xDECB, {0xFB, 0xAB}}, {0xDFB9, {0xFB, 0xAD}},
 219         {0xDFC3, {0xFB, 0xAF}}, {0xE0D9, {0xFB, 0xB2}}, {0xE1E2, {0xFB, 0xB5}},
 220         {0xE2C7, {0xFB, 0xB9}}, {0xE3A6, {0xFB, 0xBB}}, {0xE3A8, {0xFB, 0xBA}},
 221         {0xE3A9, {0xFB, 0xBC}}, {0xE3AA, {0xFB, 0xBF}}, {0xE3AB, {0xFB, 0xC0}},
 222         {0xE3AF, {0xFB, 0xBD}}, {0xE3B0, {0xFB, 0xBE}}, {0xE3BC, {0xFB, 0xC1}},
 223         {0xE3BF, {0xFB, 0xC3}}, {0xE3C1, {0xFB, 0xC2}}, {0xE3D4, {0xFB, 0xCA}},
 224         {0xE3D5, {0xFB, 0xC4}}, {0xE3D6, {0xFB, 0xC6}}, {0xE3D8, {0xFB, 0xC5}},
 225         {0xE3DF, {0xFB, 0xC7}}, {0xE3E1, {0xFB, 0xC9}}, {0xE3E3, {0xFB, 0xC8}},
 226         {0xE3E9, {0xFB, 0xCB}}, {0xE3F1, {0xFB, 0xCD}}, {0xE3F2, {0xFB, 0xCE}},
 227         {0xE3F8, {0xFA, 0x5F}}, {0xE4A6, {0xFB, 0xCC}}, {0xE4BE, {0xFB, 0xD2}},
 228         {0xE4BF, {0xFB, 0xD6}}, {0xE4C0, {0xFB, 0xD4}}, {0xE4C1, {0xFB, 0xD0}},
 229         {0xE4C3, {0xFB, 0xD1}}, {0xE4C7, {0xFB, 0xD5}}, {0xE4CB, {0xFB, 0xCF}},
 230         {0xE4D0, {0xFA, 0x65}}, {0xE4D1, {0xFB, 0xD9}}, {0xE4D2, {0xFB, 0xDC}},
 231         {0xE4D4, {0xFB, 0xDE}}, {0xE4DB, {0xFB, 0xDD}}, {0xE4DC, {0xFB, 0xDB}},
 232         {0xE4DE, {0xFB, 0xD8}}, {0xE4E0, {0xFB, 0xD7}}, {0xE4E9, {0xFA, 0x5E}},
 233         {0xE4EF, {0xFB, 0xE0}}, {0xE4FA, {0xFB, 0xDF}}, {0xE5B3, {0xFB, 0xE1}},
 234         {0xE5BF, {0xFB, 0xE2}}, {0xE5C9, {0xFB, 0xE3}}, {0xE5D0, {0xFB, 0xE4}},
 235         {0xE5E2, {0xFB, 0xE5}}, {0xE5EA, {0xFB, 0xE6}}, {0xE5EB, {0xFB, 0xE7}},
 236         {0xE6E8, {0xFB, 0xEB}}, {0xE6EF, {0xFB, 0xEC}}, {0xE7AC, {0xFB, 0xED}},
 237         {0xE7AE, {0xFB, 0xEF}}, {0xE7B1, {0xFB, 0xF1}}, {0xE7B2, {0xFB, 0xF3}},
 238         {0xE8B1, {0xFB, 0xF4}}, {0xE8B6, {0xFB, 0xF5}}, {0xE8DD, {0xFB, 0xF8}},
 239         {0xE9D1, {0xFB, 0xFB}}, {0xE9ED, {0xFC, 0x40}}, {0xEACD, {0xFC, 0x41}},
 240         {0xEADB, {0xFC, 0x43}}, {0xEAE6, {0xFC, 0x44}}, {0xEAEA, {0xFC, 0x45}},
 241         {0xEBA5, {0xFC, 0x46}}, {0xEBFA, {0xFC, 0x48}}, {0xEBFB, {0xFC, 0x47}},
 242         {0xECD6, {0xFC, 0x4A}},
 243 };
 244
 245 /* EUC to SJIS IBM extended characters map (G3 Upper block) */
 246 static unsigned char euc2sjisibm_g3upper_map[][2] = {
 247         {0xFA, 0x40}, {0xFA, 0x41}, {0xFA, 0x42}, {0xFA, 0x43}, {0xFA, 0x44},
 248         {0xFA, 0x45}, {0xFA, 0x46}, {0xFA, 0x47}, {0xFA, 0x48}, {0xFA, 0x49},
 249         {0xFA, 0x4A}, {0xFA, 0x4B}, {0xFA, 0x4C}, {0xFA, 0x4D}, {0xFA, 0x4E},
 250         {0xFA, 0x4F}, {0xFA, 0x50}, {0xFA, 0x51}, {0xFA, 0x52}, {0xFA, 0x53},
 251         {0xFA, 0x56}, {0xFA, 0x57}, {0xFA, 0x58}, {0xFA, 0x59}, {0xFA, 0x5A},
 252         {0xFA, 0x62}, {0xFA, 0x6A}, {0xFA, 0x7C}, {0xFA, 0x83}, {0xFA, 0x8A},
 253         {0xFA, 0x8B}, {0xFA, 0x90}, {0xFA, 0x92}, {0xFA, 0x96}, {0xFA, 0x9B},
 254         {0xFA, 0x9C}, {0xFA, 0x9D}, {0xFA, 0xAA}, {0xFA, 0xAE}, {0xFA, 0xB0},
 255         {0xFA, 0xB1}, {0xFA, 0xBA}, {0xFA, 0xBD}, {0xFA, 0xC1}, {0xFA, 0xCD},
 256         {0xFA, 0xD0}, {0xFA, 0xD5}, {0xFA, 0xD8}, {0xFA, 0xE0}, {0xFA, 0xE5},
 257         {0xFA, 0xE8}, {0xFA, 0xEA}, {0xFA, 0xEE}, {0xFA, 0xF2}, {0xFB, 0x43},
 258         {0xFB, 0x44}, {0xFB, 0x50}, {0xFB, 0x58}, {0xFB, 0x5E}, {0xFB, 0x6E},
 259         {0xFB, 0x70}, {0xFB, 0x72}, {0xFB, 0x75}, {0xFB, 0x7C}, {0xFB, 0x7D},
 260         {0xFB, 0x7E}, {0xFB, 0x80}, {0xFB, 0x82}, {0xFB, 0x85}, {0xFB, 0x86},
 261         {0xFB, 0x89}, {0xFB, 0x8D}, {0xFB, 0x8E}, {0xFB, 0x92}, {0xFB, 0x94},
 262         {0xFB, 0x9D}, {0xFB, 0x9E}, {0xFB, 0x9F}, {0xFB, 0xA0}, {0xFB, 0xA1},
 263         {0xFB, 0xA9}, {0xFB, 0xAC}, {0xFB, 0xAE}, {0xFB, 0xB0}, {0xFB, 0xB1},
 264         {0xFB, 0xB3}, {0xFB, 0xB4}, {0xFB, 0xB6}, {0xFB, 0xB7}, {0xFB, 0xB8},
 265         {0xFB, 0xD3}, {0xFB, 0xDA}, {0xFB, 0xE8}, {0xFB, 0xE9}, {0xFB, 0xEA},
 266         {0xFB, 0xEE}, {0xFB, 0xF0}, {0xFB, 0xF2}, {0xFB, 0xF6}, {0xFB, 0xF7},
 267         {0xFB, 0xF9}, {0xFB, 0xFA}, {0xFB, 0xFC}, {0xFC, 0x42}, {0xFC, 0x49},
 268         {0xFC, 0x4B},
 269 };
 270
 271 static inline int sjisibm2euc(unsigned char *euc, const unsigned char sjis_hi,
 272                               const unsigned char sjis_lo);
 273 static inline int euc2sjisibm_jisx0212(unsigned char *sjis, const unsigned char euc_hi,
 274                                        const unsigned char euc_lo);
 275 static inline int euc2sjisibm_g3upper(unsigned char *sjis, const unsigned char euc_hi,
 276                                       const unsigned char euc_lo);
 277 static inline int euc2sjisibm(unsigned char *sjis, const unsigned char euc_hi,
 278                               const unsigned char euc_lo);
 279 static inline int sjisnec2sjisibm(unsigned char *sjisibm,
 280                                   const unsigned char sjisnec_hi,
 281                                   const unsigned char sjisnec_lo);
 282
 283 /* SJIS IBM extended characters to EUC */
 284 static inline int sjisibm2euc(unsigned char *euc, const unsigned char sjis_hi,
 285                               const unsigned char sjis_lo)
 286 {
 287         int index;
 288
 289         index = ((sjis_hi - 0xFA) * (0xFD - 0x40)) + (sjis_lo - 0x40);
 290         if (IS_EUC_IBM2JISX0208(sjisibm2euc_map[index][0],
 291                                 sjisibm2euc_map[index][1])) {
 292                 euc[0] = sjisibm2euc_map[index][0];
 293                 euc[1] = sjisibm2euc_map[index][1];
 294                 return 2;
 295         } else {
 296                 euc[0] = SS3;
 297                 euc[1] = sjisibm2euc_map[index][0];
 298                 euc[2] = sjisibm2euc_map[index][1];
 299                 return 3;
 300         }
 301 }
 302
 303 /* EUC to SJIS IBM extended characters (G3 JIS X 0212 block) */
 304 static inline int euc2sjisibm_jisx0212(unsigned char *sjis, const unsigned char euc_hi,
 305                                        const unsigned char euc_lo)
 306 {
 307         int index, min_index, max_index;
 308         unsigned short euc;
 309
 310         min_index = 0;
 311         max_index = ARRAY_SIZE(euc2sjisibm_jisx0212_map) - 1;
 312         euc = (euc_hi << 8) | euc_lo;
 313
 314         while (min_index <= max_index) {
 315                 index = (min_index + max_index) / 2;
 316                 if (euc < euc2sjisibm_jisx0212_map[index].euc)
 317                         max_index = index - 1;
 318                 else
 319                         min_index = index + 1;
 320                 if (euc == euc2sjisibm_jisx0212_map[index].euc) {
 321                         sjis[0] = euc2sjisibm_jisx0212_map[index].sjis[0];
 322                         sjis[1] = euc2sjisibm_jisx0212_map[index].sjis[1];
 323                         return 3;
 324                 }
 325         }
 326         return 0;
 327 }
 328
 329 /* EUC to SJIS IBM extended characters (G3 Upper block) */
 330 static inline int euc2sjisibm_g3upper(unsigned char *sjis, const unsigned char euc_hi,
 331                                       const unsigned char euc_lo)
 332 {
 333         int index;
 334
 335         if (euc_hi == 0xF3)
 336                 index = ((euc_hi << 8) | euc_lo) - 0xF3F3;
 337         else
 338                 index = ((euc_hi << 8) | euc_lo) - 0xF4A1 + 12;
 339
 340         if ((index < 0) || (index >= ARRAY_SIZE(euc2sjisibm_g3upper_map)))
 341                 return 0;
 342
 343         sjis[0] = euc2sjisibm_g3upper_map[index][0];
 344         sjis[1] = euc2sjisibm_g3upper_map[index][1];
 345
 346         return 3;
 347 }
 348
 349 /* EUC to SJIS IBM extended characters (G3 block) */
 350 static inline int euc2sjisibm(unsigned char *sjis, const unsigned char euc_hi,
 351                               const unsigned char euc_lo)
 352 {
 353         int n;
 354
 355 #if 0
 356         if ((euc_hi == 0xA2) && (euc_lo == 0xCC)) {
 357                 sjis[0] = 0xFA;
 358                 sjis[1] = 0x54;
 359                 return 2;
 360         } else if ((euc_hi == 0xA2) && (euc_lo == 0xE8)) {
 361                 sjis[0] = 0xFA;
 362                 sjis[1] = 0x5B;
 363                 return 2;
 364         }
 365 #endif
 366         if ((n = euc2sjisibm_g3upper(sjis, euc_hi, euc_lo))) {
 367                 return n;
 368         } else if ((n = euc2sjisibm_jisx0212(sjis, euc_hi, euc_lo))) {
 369                 return n;
 370         }
 371
 372         return 0;
 373 }
 374
 375 /* NEC/IBM extended characters to IBM extended characters */
 376 static inline int sjisnec2sjisibm(unsigned char *sjisibm,
 377                                   const unsigned char sjisnec_hi,
 378                                   const unsigned char sjisnec_lo)
 379 {
 380         int count;
 381
 382         if (! IS_SJIS_NECIBM(sjisnec_hi, sjisnec_lo))
 383                 return 0;
 384
 385         if ((sjisnec_hi == 0xEE) && (sjisnec_lo == 0xF9)) {
 386                 sjisibm[0] = 0x81;
 387                 sjisibm[1] = 0xCA;
 388                 return 2;
 389         }
 390
 391         if ((sjisnec_hi == 0xEE) && (sjisnec_lo >= 0xEF)) {
 392                 count = (sjisnec_hi << 8 | sjisnec_lo)
 393                         - (sjisnec_lo <= 0xF9 ? 0xEEEF : (0xEEEF - 10));
 394         } else {
 395                 count = (sjisnec_hi - 0xED) * (0xFC - 0x40)
 396                         + (sjisnec_lo - 0x40) + (0x5C - 0x40);
 397                 if (sjisnec_lo >= 0x7F)
 398                         count--;
 399         }
 400
 401         sjisibm[0] = 0xFA + (count / (0xFC - 0x40));
 402         sjisibm[1] = 0x40 + (count % (0xFC - 0x40));
 403         if (sjisibm[1] >= 0x7F)
 404                 sjisibm[1]++;
 405
 406         return 2;
 407 }
 408
 409 static int uni2char(const wchar_t uni,
 410                     unsigned char *out, int boundlen)
 411 {
 412         int n;
 413
 414         if (!p_nls)
 415                 return -EINVAL;
 416         if ((n = p_nls->uni2char(uni, out, boundlen)) < 0)
 417                 return n;
 418
 419         /* translate SJIS into EUC-JP */
 420         if (n == 1) {
 421                 if (IS_SJIS_JISX0201KANA(out[0])) {
 422                         /* JIS X 0201 KANA */
 423                         if (boundlen < 2)
 424                                 return -ENAMETOOLONG;
 425
 426                         out[1] = out[0];
 427                         out[0] = SS2;
 428                         return 2;
 429                 }
 430         } else if (n == 2) {
 431                 /* NEC/IBM extended characters to IBM extended characters */
 432                 sjisnec2sjisibm(out, out[0], out[1]);
 433
 434                 if (IS_SJIS_UDC_LOW(out[0], out[1])) {
 435                         /* User defined characters half low */
 436                         MAP_SJIS2EUC(out[0], out[1], 0xF0, out[0], out[1], 0xF5);
 437                 } else if (IS_SJIS_UDC_HI(out[0], out[1])) {
 438                         /* User defined characters half high */
 439                         unsigned char ch, cl;
 440
 441                         if (boundlen < 3)
 442                                 return -ENAMETOOLONG;
 443
 444                         n = 3; ch = out[0]; cl = out[1];
 445                         out[0] = SS3;
 446                         MAP_SJIS2EUC(ch, cl, 0xF5, out[1], out[2], 0xF5);
 447                 } else if (IS_SJIS_IBM(out[0], out[1])) {
 448                         /* IBM extended characters */
 449                         unsigned char euc[3], i;
 450
 451                         n = sjisibm2euc(euc, out[0], out[1]);
 452                         if (boundlen < n)
 453                                 return -ENAMETOOLONG;
 454                         for (i = 0; i < n; i++)
 455                                 out[i] = euc[i];
 456                 } else if (IS_SJIS_JISX0208(out[0], out[1])) {
 457                         /* JIS X 0208 (include NEC special characters) */
 458                         out[0] = (out[0]^0xA0)*2 + 0x5F;
 459                         if (out[1] > 0x9E)
 460                                 out[0]++;
 461
 462                         if (out[1] < 0x7F)
 463                                 out[1] = out[1] + 0x61;
 464                         else if (out[1] < 0x9F)
 465                                 out[1] = out[1] + 0x60;
 466                         else
 467                                 out[1] = out[1] + 0x02;
 468                 } else {
 469                         /* Invalid characters */
 470                         return -EINVAL;
 471                 }
 472         }
 473         else
 474                 return -EINVAL;
 475
 476         return n;
 477 }
 478
 479 static int char2uni(const unsigned char *rawstring, int boundlen,
 480                     wchar_t *uni)
 481 {
 482         unsigned char sjis_temp[2];
 483         int euc_offset, n;
 484
 485         if ( !p_nls )
 486                 return -EINVAL;
 487         if (boundlen <= 0)
 488                 return -ENAMETOOLONG;
 489
 490         /* translate EUC-JP into SJIS */
 491         if (rawstring[0] > 0x7F) {
 492                 if (rawstring[0] == SS3) {
 493                         if (boundlen < 3)
 494                                 return -EINVAL;
 495                         euc_offset = 3;
 496
 497                         if (IS_EUC_UDC_HI(rawstring[1], rawstring[2])) {
 498                                 /* User defined characters half high */
 499                                 MAP_EUC2SJIS(rawstring[1], rawstring[2], 0xF5,
 500                                              sjis_temp[0], sjis_temp[1], 0xF5);
 501                         } else if (euc2sjisibm(sjis_temp,rawstring[1],rawstring[2])) {
 502                                 /* IBM extended characters */
 503                         } else {
 504                                 /* JIS X 0212 and Invalid characters*/
 505                                 return -EINVAL;
 506
 507                                 /* 'GETA' with SJIS coding */
 508                                 /* sjis_temp[0] = 0x81; */
 509                                 /* sjis_temp[1] = 0xAC; */
 510                         }
 511                 } else {
 512                         if (boundlen < 2)
 513                                 return -EINVAL;
 514                         euc_offset = 2;
 515
 516                         if (IS_EUC_JISX0201KANA(rawstring[0], rawstring[1])) {
 517                                 /* JIS X 0201 KANA */
 518                                 sjis_temp[0] = rawstring[1];
 519                                 sjis_temp[1] = 0x00;
 520                         } else if (IS_EUC_UDC_LOW(rawstring[0], rawstring[1])) {
 521                                 /* User defined characters half low */
 522                                 MAP_EUC2SJIS(rawstring[0], rawstring[1], 0xF5,
 523                                              sjis_temp[0], sjis_temp[1], 0xF0);
 524                         } else if (IS_EUC_JISX0208(rawstring[0], rawstring[1])) {
 525                                 /* JIS X 0208 (include NEC spesial characters) */
 526                                 sjis_temp[0] = ((rawstring[0]-0x5f)/2) ^ 0xA0;
 527                                 if (!(rawstring[0] & 1))
 528                                         sjis_temp[1] = rawstring[1] - 0x02;
 529                                 else if (rawstring[1] < 0xE0)
 530                                         sjis_temp[1] = rawstring[1] - 0x61;
 531                                 else
 532                                         sjis_temp[1] = rawstring[1] - 0x60;
 533                         } else {
 534                                 /* Invalid characters */
 535                                 return -EINVAL;
 536                         }
 537                 }
 538         } else {
 539                 euc_offset = 1;
 540
 541                 /* JIS X 0201 ROMAJI */
 542                 sjis_temp[0] = rawstring[0];
 543                 sjis_temp[1] = 0x00;
 544         }
 545
 546         if ( (n = p_nls->char2uni(sjis_temp, sizeof(sjis_temp), uni)) < 0)
 547                 return n;
 548
 549         return euc_offset;
 550 }
 551
 552 static struct nls_table table = {
 553         .charset        = "euc-jp",
 554         .uni2char       = uni2char,
 555         .char2uni       = char2uni,
 556         .owner          = THIS_MODULE,
 557 };
 558
 559 static int __init init_nls_euc_jp(void)
 560 {
 561         p_nls = load_nls("cp932");
 562
 563         if (p_nls) {
 564                 table.charset2upper = p_nls->charset2upper;
 565                 table.charset2lower = p_nls->charset2lower;
 566                 return register_nls(&table);
 567         }
 568
 569         return -EINVAL;
 570 }
 571
 572 static void __exit exit_nls_euc_jp(void)
 573 {
 574         unregister_nls(&table);
 575         unload_nls(p_nls);
 576 }
 577
 578 module_init(init_nls_euc_jp)
 579 module_exit(exit_nls_euc_jp)
 580
 581 MODULE_LICENSE("Dual BSD/GPL");