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OSCL-LXR
 
 

     

0001 /*
0002  * linux/fs/nls/nls_euc-jp.c
0003  *
0004  * Added `OSF/JVC Recommended Code Set Conversion Specification
0005  * between Japanese EUC and Shift-JIS' support: <hirofumi@mail.parknet.co.jp>
0006  * (http://www.opengroup.or.jp/jvc/cde/sjis-euc-e.html)
0007  */
0008 
0009 #include <linux/module.h>
0010 #include <linux/kernel.h>
0011 #include <linux/string.h>
0012 #include <linux/nls.h>
0013 #include <linux/errno.h>
0014 
0015 static struct nls_table *p_nls;
0016 
0017 #define IS_SJIS_LOW_BYTE(l) ((0x40 <= (l)) && ((l) <= 0xFC) && ((l) != 0x7F))
0018 /* JIS X 0208 (include NEC spesial characters) */
0019 #define IS_SJIS_JISX0208(h, l)  ((((0x81 <= (h)) && ((h) <= 0x9F))  \
0020                  || ((0xE0 <= (h)) && ((h) <= 0xEA)))   \
0021                  && IS_SJIS_LOW_BYTE(l))
0022 #define IS_SJIS_JISX0201KANA(c) ((0xA1 <= (c)) && ((c) <= 0xDF))
0023 #define IS_SJIS_UDC_LOW(h, l)   (((0xF0 <= (h)) && ((h) <= 0xF4))   \
0024                  && IS_SJIS_LOW_BYTE(l))
0025 #define IS_SJIS_UDC_HI(h, l)    (((0xF5 <= (h)) && ((h) <= 0xF9))   \
0026                  && IS_SJIS_LOW_BYTE(l))
0027 #define IS_SJIS_IBM(h, l)   (((0xFA <= (h)) && ((h) <= 0xFC))   \
0028                  && IS_SJIS_LOW_BYTE(l))
0029 #define IS_SJIS_NECIBM(h, l)    (((0xED <= (h)) && ((h) <= 0xEE))   \
0030                  && IS_SJIS_LOW_BYTE(l))
0031 #define MAP_SJIS2EUC(sjis_hi, sjis_lo, sjis_p, euc_hi, euc_lo, euc_p) {     \
0032     if ((sjis_lo) >= 0x9F) {                        \
0033         (euc_hi) = (sjis_hi) * 2 - (((sjis_p) * 2 - (euc_p)) - 1);  \
0034         (euc_lo) = (sjis_lo) + 2;                   \
0035     } else {                                \
0036         (euc_hi) = (sjis_hi) * 2 - ((sjis_p) * 2 - (euc_p));        \
0037         (euc_lo) = (sjis_lo) + ((sjis_lo) >= 0x7F ? 0x60 : 0x61);   \
0038     }                                   \
0039 } while(0)
0040 
0041 #define SS2     (0x8E)      /* Single Shift 2 */
0042 #define SS3     (0x8F)      /* Single Shift 3 */
0043 #define IS_EUC_BYTE(c)      ((0xA1 <= (c)) && ((c) <= 0xFE))
0044 #define IS_EUC_JISX0208(h, l)   (IS_EUC_BYTE(h) && IS_EUC_BYTE(l))
0045 #define IS_EUC_JISX0201KANA(h, l)   (((h) == SS2) && (0xA1 <= (l) && (l) <= 0xDF))
0046 #define IS_EUC_UDC_LOW(h, l)    (((0xF5 <= (h)) && ((h) <= 0xFE))   \
0047                  && IS_EUC_BYTE(l))
0048 #define IS_EUC_UDC_HI(h, l) IS_EUC_UDC_LOW(h, l) /* G3 block */
0049 #define MAP_EUC2SJIS(euc_hi, euc_lo, euc_p, sjis_hi, sjis_lo, sjis_p) {     \
0050     if ((euc_hi) & 1) {                         \
0051         (sjis_hi) = (euc_hi) / 2 + ((sjis_p) - (euc_p) / 2);        \
0052         (sjis_lo) = (euc_lo) - ((euc_lo) >= 0xE0 ? 0x60 : 0x61);    \
0053     } else {                                \
0054         (sjis_hi) = (euc_hi) / 2 + (((sjis_p) - (euc_p) / 2) - 1);  \
0055         (sjis_lo) = (euc_lo) - 2;                   \
0056     }                                   \
0057 } while(0)
0058 
0059 /* SJIS IBM extended characters to EUC map */
0060 static const unsigned char sjisibm2euc_map[][2] = {
0061     {0xF3, 0xF3}, {0xF3, 0xF4}, {0xF3, 0xF5}, {0xF3, 0xF6}, {0xF3, 0xF7},
0062     {0xF3, 0xF8}, {0xF3, 0xF9}, {0xF3, 0xFA}, {0xF3, 0xFB}, {0xF3, 0xFC},
0063     {0xF3, 0xFD}, {0xF3, 0xFE}, {0xF4, 0xA1}, {0xF4, 0xA2}, {0xF4, 0xA3},
0064     {0xF4, 0xA4}, {0xF4, 0xA5}, {0xF4, 0xA6}, {0xF4, 0xA7}, {0xF4, 0xA8},
0065     {0xA2, 0xCC}, {0xA2, 0xC3}, {0xF4, 0xA9}, {0xF4, 0xAA}, {0xF4, 0xAB},
0066     {0xF4, 0xAC}, {0xF4, 0xAD}, {0xA2, 0xE8}, {0xD4, 0xE3}, {0xDC, 0xDF},
0067     {0xE4, 0xE9}, {0xE3, 0xF8}, {0xD9, 0xA1}, {0xB1, 0xBB}, {0xF4, 0xAE},
0068     {0xC2, 0xAD}, {0xC3, 0xFC}, {0xE4, 0xD0}, {0xC2, 0xBF}, {0xBC, 0xF4},
0069     {0xB0, 0xA9}, {0xB0, 0xC8}, {0xF4, 0xAF}, {0xB0, 0xD2}, {0xB0, 0xD4},
0070     {0xB0, 0xE3}, {0xB0, 0xEE}, {0xB1, 0xA7}, {0xB1, 0xA3}, {0xB1, 0xAC},
0071     {0xB1, 0xA9}, {0xB1, 0xBE}, {0xB1, 0xDF}, {0xB1, 0xD8}, {0xB1, 0xC8},
0072     {0xB1, 0xD7}, {0xB1, 0xE3}, {0xB1, 0xF4}, {0xB1, 0xE1}, {0xB2, 0xA3},
0073     {0xF4, 0xB0}, {0xB2, 0xBB}, {0xB2, 0xE6}, {0x00, 0x00}, {0xB2, 0xED},
0074     {0xB2, 0xF5}, {0xB2, 0xFC}, {0xF4, 0xB1}, {0xB3, 0xB5}, {0xB3, 0xD8},
0075     {0xB3, 0xDB}, {0xB3, 0xE5}, {0xB3, 0xEE}, {0xB3, 0xFB}, {0xF4, 0xB2},
0076     {0xF4, 0xB3}, {0xB4, 0xC0}, {0xB4, 0xC7}, {0xB4, 0xD0}, {0xB4, 0xDE},
0077     {0xF4, 0xB4}, {0xB5, 0xAA}, {0xF4, 0xB5}, {0xB5, 0xAF}, {0xB5, 0xC4},
0078     {0xB5, 0xE8}, {0xF4, 0xB6}, {0xB7, 0xC2}, {0xB7, 0xE4}, {0xB7, 0xE8},
0079     {0xB7, 0xE7}, {0xF4, 0xB7}, {0xF4, 0xB8}, {0xF4, 0xB9}, {0xB8, 0xCE},
0080     {0xB8, 0xE1}, {0xB8, 0xF5}, {0xB8, 0xF7}, {0xB8, 0xF8}, {0xB8, 0xFC},
0081     {0xB9, 0xAF}, {0xB9, 0xB7}, {0xBA, 0xBE}, {0xBA, 0xDB}, {0xCD, 0xAA},
0082     {0xBA, 0xE1}, {0xF4, 0xBA}, {0xBA, 0xEB}, {0xBB, 0xB3}, {0xBB, 0xB8},
0083     {0xF4, 0xBB}, {0xBB, 0xCA}, {0xF4, 0xBC}, {0xF4, 0xBD}, {0xBB, 0xD0},
0084     {0xBB, 0xDE}, {0xBB, 0xF4}, {0xBB, 0xF5}, {0xBB, 0xF9}, {0xBC, 0xE4},
0085     {0xBC, 0xED}, {0xBC, 0xFE}, {0xF4, 0xBE}, {0xBD, 0xC2}, {0xBD, 0xE7},
0086     {0xF4, 0xBF}, {0xBD, 0xF0}, {0xBE, 0xB0}, {0xBE, 0xAC}, {0xF4, 0xC0},
0087     {0xBE, 0xB3}, {0xBE, 0xBD}, {0xBE, 0xCD}, {0xBE, 0xC9}, {0xBE, 0xE4},
0088     {0xBF, 0xA8}, {0xBF, 0xC9}, {0xC0, 0xC4}, {0xC0, 0xE4}, {0xC0, 0xF4},
0089     {0xC1, 0xA6}, {0xF4, 0xC1}, {0xC1, 0xF5}, {0xC1, 0xFC}, {0xF4, 0xC2},
0090     {0xC1, 0xF8}, {0xC2, 0xAB}, {0xC2, 0xA1}, {0xC2, 0xA5}, {0xF4, 0xC3},
0091     {0xC2, 0xB8}, {0xC2, 0xBA}, {0xF4, 0xC4}, {0xC2, 0xC4}, {0xC2, 0xD2},
0092     {0xC2, 0xD7}, {0xC2, 0xDB}, {0xC2, 0xDE}, {0xC2, 0xED}, {0xC2, 0xF0},
0093     {0xF4, 0xC5}, {0xC3, 0xA1}, {0xC3, 0xB5}, {0xC3, 0xC9}, {0xC3, 0xB9},
0094     {0xF4, 0xC6}, {0xC3, 0xD8}, {0xC3, 0xFE}, {0xF4, 0xC7}, {0xC4, 0xCC},
0095     {0xF4, 0xC8}, {0xC4, 0xD9}, {0xC4, 0xEA}, {0xC4, 0xFD}, {0xF4, 0xC9},
0096     {0xC5, 0xA7}, {0xC5, 0xB5}, {0xC5, 0xB6}, {0xF4, 0xCA}, {0xC5, 0xD5},
0097     {0xC6, 0xB8}, {0xC6, 0xD7}, {0xC6, 0xE0}, {0xC6, 0xEA}, {0xC6, 0xE3},
0098     {0xC7, 0xA1}, {0xC7, 0xAB}, {0xC7, 0xC7}, {0xC7, 0xC3}, {0xC7, 0xCB},
0099     {0xC7, 0xCF}, {0xC7, 0xD9}, {0xF4, 0xCB}, {0xF4, 0xCC}, {0xC7, 0xE6},
0100     {0xC7, 0xEE}, {0xC7, 0xFC}, {0xC7, 0xEB}, {0xC7, 0xF0}, {0xC8, 0xB1},
0101     {0xC8, 0xE5}, {0xC8, 0xF8}, {0xC9, 0xA6}, {0xC9, 0xAB}, {0xC9, 0xAD},
0102     {0xF4, 0xCD}, {0xC9, 0xCA}, {0xC9, 0xD3}, {0xC9, 0xE9}, {0xC9, 0xE3},
0103     {0xC9, 0xFC}, {0xC9, 0xF4}, {0xC9, 0xF5}, {0xF4, 0xCE}, {0xCA, 0xB3},
0104     {0xCA, 0xBD}, {0xCA, 0xEF}, {0xCA, 0xF1}, {0xCB, 0xAE}, {0xF4, 0xCF},
0105     {0xCB, 0xCA}, {0xCB, 0xE6}, {0xCB, 0xEA}, {0xCB, 0xF0}, {0xCB, 0xF4},
0106     {0xCB, 0xEE}, {0xCC, 0xA5}, {0xCB, 0xF9}, {0xCC, 0xAB}, {0xCC, 0xAE},
0107     {0xCC, 0xAD}, {0xCC, 0xB2}, {0xCC, 0xC2}, {0xCC, 0xD0}, {0xCC, 0xD9},
0108     {0xF4, 0xD0}, {0xCD, 0xBB}, {0xF4, 0xD1}, {0xCE, 0xBB}, {0xF4, 0xD2},
0109     {0xCE, 0xBA}, {0xCE, 0xC3}, {0xF4, 0xD3}, {0xCE, 0xF2}, {0xB3, 0xDD},
0110     {0xCF, 0xD5}, {0xCF, 0xE2}, {0xCF, 0xE9}, {0xCF, 0xED}, {0xF4, 0xD4},
0111     {0xF4, 0xD5}, {0xF4, 0xD6}, {0x00, 0x00}, {0xF4, 0xD7}, {0xD0, 0xE5},
0112     {0xF4, 0xD8}, {0xD0, 0xE9}, {0xD1, 0xE8}, {0xF4, 0xD9}, {0xF4, 0xDA},
0113     {0xD1, 0xEC}, {0xD2, 0xBB}, {0xF4, 0xDB}, {0xD3, 0xE1}, {0xD3, 0xE8},
0114     {0xD4, 0xA7}, {0xF4, 0xDC}, {0xF4, 0xDD}, {0xD4, 0xD4}, {0xD4, 0xF2},
0115     {0xD5, 0xAE}, {0xF4, 0xDE}, {0xD7, 0xDE}, {0xF4, 0xDF}, {0xD8, 0xA2},
0116     {0xD8, 0xB7}, {0xD8, 0xC1}, {0xD8, 0xD1}, {0xD8, 0xF4}, {0xD9, 0xC6},
0117     {0xD9, 0xC8}, {0xD9, 0xD1}, {0xF4, 0xE0}, {0xF4, 0xE1}, {0xF4, 0xE2},
0118     {0xF4, 0xE3}, {0xF4, 0xE4}, {0xDC, 0xD3}, {0xDD, 0xC8}, {0xDD, 0xD4},
0119     {0xDD, 0xEA}, {0xDD, 0xFA}, {0xDE, 0xA4}, {0xDE, 0xB0}, {0xF4, 0xE5},
0120     {0xDE, 0xB5}, {0xDE, 0xCB}, {0xF4, 0xE6}, {0xDF, 0xB9}, {0xF4, 0xE7},
0121     {0xDF, 0xC3}, {0xF4, 0xE8}, {0xF4, 0xE9}, {0xE0, 0xD9}, {0xF4, 0xEA},
0122     {0xF4, 0xEB}, {0xE1, 0xE2}, {0xF4, 0xEC}, {0xF4, 0xED}, {0xF4, 0xEE},
0123     {0xE2, 0xC7}, {0xE3, 0xA8}, {0xE3, 0xA6}, {0xE3, 0xA9}, {0xE3, 0xAF},
0124     {0xE3, 0xB0}, {0xE3, 0xAA}, {0xE3, 0xAB}, {0xE3, 0xBC}, {0xE3, 0xC1},
0125     {0xE3, 0xBF}, {0xE3, 0xD5}, {0xE3, 0xD8}, {0xE3, 0xD6}, {0xE3, 0xDF},
0126     {0xE3, 0xE3}, {0xE3, 0xE1}, {0xE3, 0xD4}, {0xE3, 0xE9}, {0xE4, 0xA6},
0127     {0xE3, 0xF1}, {0xE3, 0xF2}, {0xE4, 0xCB}, {0xE4, 0xC1}, {0xE4, 0xC3},
0128     {0xE4, 0xBE}, {0xF4, 0xEF}, {0xE4, 0xC0}, {0xE4, 0xC7}, {0xE4, 0xBF},
0129     {0xE4, 0xE0}, {0xE4, 0xDE}, {0xE4, 0xD1}, {0xF4, 0xF0}, {0xE4, 0xDC},
0130     {0xE4, 0xD2}, {0xE4, 0xDB}, {0xE4, 0xD4}, {0xE4, 0xFA}, {0xE4, 0xEF},
0131     {0xE5, 0xB3}, {0xE5, 0xBF}, {0xE5, 0xC9}, {0xE5, 0xD0}, {0xE5, 0xE2},
0132     {0xE5, 0xEA}, {0xE5, 0xEB}, {0xF4, 0xF1}, {0xF4, 0xF2}, {0xF4, 0xF3},
0133     {0xE6, 0xE8}, {0xE6, 0xEF}, {0xE7, 0xAC}, {0xF4, 0xF4}, {0xE7, 0xAE},
0134     {0xF4, 0xF5}, {0xE7, 0xB1}, {0xF4, 0xF6}, {0xE7, 0xB2}, {0xE8, 0xB1},
0135     {0xE8, 0xB6}, {0xF4, 0xF7}, {0xF4, 0xF8}, {0xE8, 0xDD}, {0xF4, 0xF9},
0136     {0xF4, 0xFA}, {0xE9, 0xD1}, {0xF4, 0xFB}, {0xE9, 0xED}, {0xEA, 0xCD},
0137     {0xF4, 0xFC}, {0xEA, 0xDB}, {0xEA, 0xE6}, {0xEA, 0xEA}, {0xEB, 0xA5},
0138     {0xEB, 0xFB}, {0xEB, 0xFA}, {0xF4, 0xFD}, {0xEC, 0xD6}, {0xF4, 0xFE},
0139 };
0140 
0141 #define IS_EUC_IBM2JISX0208(h, l) \
0142         (((h) == 0xA2 && (l) == 0xCC) || ((h) == 0xA2 && (l) == 0xE8))
0143 
0144 /* EUC to SJIS IBM extended characters map (G3 JIS X 0212 block) */
0145 static struct {
0146     unsigned short euc;
0147     unsigned char sjis[2];
0148 } euc2sjisibm_jisx0212_map[] = {
0149     {0xA2C3, {0xFA, 0x55}}, {0xB0A9, {0xFA, 0x68}}, {0xB0C8, {0xFA, 0x69}},
0150     {0xB0D2, {0xFA, 0x6B}}, {0xB0D4, {0xFA, 0x6C}}, {0xB0E3, {0xFA, 0x6D}},
0151     {0xB0EE, {0xFA, 0x6E}}, {0xB1A3, {0xFA, 0x70}}, {0xB1A7, {0xFA, 0x6F}},
0152     {0xB1A9, {0xFA, 0x72}}, {0xB1AC, {0xFA, 0x71}}, {0xB1BB, {0xFA, 0x61}},
0153     {0xB1BE, {0xFA, 0x73}}, {0xB1C8, {0xFA, 0x76}}, {0xB1D7, {0xFA, 0x77}},
0154     {0xB1D8, {0xFA, 0x75}}, {0xB1DF, {0xFA, 0x74}}, {0xB1E1, {0xFA, 0x7A}},
0155     {0xB1E3, {0xFA, 0x78}}, {0xB1F4, {0xFA, 0x79}}, {0xB2A3, {0xFA, 0x7B}},
0156     {0xB2BB, {0xFA, 0x7D}}, {0xB2E6, {0xFA, 0x7E}}, {0xB2ED, {0xFA, 0x80}},
0157     {0xB2F5, {0xFA, 0x81}}, {0xB2FC, {0xFA, 0x82}}, {0xB3B5, {0xFA, 0x84}},
0158     {0xB3D8, {0xFA, 0x85}}, {0xB3DB, {0xFA, 0x86}}, {0xB3DD, {0xFB, 0x77}},
0159     {0xB3E5, {0xFA, 0x87}}, {0xB3EE, {0xFA, 0x88}}, {0xB3FB, {0xFA, 0x89}},
0160     {0xB4C0, {0xFA, 0x8C}}, {0xB4C7, {0xFA, 0x8D}}, {0xB4D0, {0xFA, 0x8E}},
0161     {0xB4DE, {0xFA, 0x8F}}, {0xB5AA, {0xFA, 0x91}}, {0xB5AF, {0xFA, 0x93}},
0162     {0xB5C4, {0xFA, 0x94}}, {0xB5E8, {0xFA, 0x95}}, {0xB7C2, {0xFA, 0x97}},
0163     {0xB7E4, {0xFA, 0x98}}, {0xB7E7, {0xFA, 0x9A}}, {0xB7E8, {0xFA, 0x99}},
0164     {0xB8CE, {0xFA, 0x9E}}, {0xB8E1, {0xFA, 0x9F}}, {0xB8F5, {0xFA, 0xA0}},
0165     {0xB8F7, {0xFA, 0xA1}}, {0xB8F8, {0xFA, 0xA2}}, {0xB8FC, {0xFA, 0xA3}},
0166     {0xB9AF, {0xFA, 0xA4}}, {0xB9B7, {0xFA, 0xA5}}, {0xBABE, {0xFA, 0xA6}},
0167     {0xBADB, {0xFA, 0xA7}}, {0xBAE1, {0xFA, 0xA9}}, {0xBAEB, {0xFA, 0xAB}},
0168     {0xBBB3, {0xFA, 0xAC}}, {0xBBB8, {0xFA, 0xAD}}, {0xBBCA, {0xFA, 0xAF}},
0169     {0xBBD0, {0xFA, 0xB2}}, {0xBBDE, {0xFA, 0xB3}}, {0xBBF4, {0xFA, 0xB4}},
0170     {0xBBF5, {0xFA, 0xB5}}, {0xBBF9, {0xFA, 0xB6}}, {0xBCE4, {0xFA, 0xB7}},
0171     {0xBCED, {0xFA, 0xB8}}, {0xBCF4, {0xFA, 0x67}}, {0xBCFE, {0xFA, 0xB9}},
0172     {0xBDC2, {0xFA, 0xBB}}, {0xBDE7, {0xFA, 0xBC}}, {0xBDF0, {0xFA, 0xBE}},
0173     {0xBEAC, {0xFA, 0xC0}}, {0xBEB0, {0xFA, 0xBF}}, {0xBEB3, {0xFA, 0xC2}},
0174     {0xBEBD, {0xFA, 0xC3}}, {0xBEC9, {0xFA, 0xC5}}, {0xBECD, {0xFA, 0xC4}},
0175     {0xBEE4, {0xFA, 0xC6}}, {0xBFA8, {0xFA, 0xC7}}, {0xBFC9, {0xFA, 0xC8}},
0176     {0xC0C4, {0xFA, 0xC9}}, {0xC0E4, {0xFA, 0xCA}}, {0xC0F4, {0xFA, 0xCB}},
0177     {0xC1A6, {0xFA, 0xCC}}, {0xC1F5, {0xFA, 0xCE}}, {0xC1F8, {0xFA, 0xD1}},
0178     {0xC1FC, {0xFA, 0xCF}}, {0xC2A1, {0xFA, 0xD3}}, {0xC2A5, {0xFA, 0xD4}},
0179     {0xC2AB, {0xFA, 0xD2}}, {0xC2AD, {0xFA, 0x63}}, {0xC2B8, {0xFA, 0xD6}},
0180     {0xC2BA, {0xFA, 0xD7}}, {0xC2BF, {0xFA, 0x66}}, {0xC2C4, {0xFA, 0xD9}},
0181     {0xC2D2, {0xFA, 0xDA}}, {0xC2D7, {0xFA, 0xDB}}, {0xC2DB, {0xFA, 0xDC}},
0182     {0xC2DE, {0xFA, 0xDD}}, {0xC2ED, {0xFA, 0xDE}}, {0xC2F0, {0xFA, 0xDF}},
0183     {0xC3A1, {0xFA, 0xE1}}, {0xC3B5, {0xFA, 0xE2}}, {0xC3B9, {0xFA, 0xE4}},
0184     {0xC3C9, {0xFA, 0xE3}}, {0xC3D8, {0xFA, 0xE6}}, {0xC3FC, {0xFA, 0x64}},
0185     {0xC3FE, {0xFA, 0xE7}}, {0xC4CC, {0xFA, 0xE9}}, {0xC4D9, {0xFA, 0xEB}},
0186     {0xC4EA, {0xFA, 0xEC}}, {0xC4FD, {0xFA, 0xED}}, {0xC5A7, {0xFA, 0xEF}},
0187     {0xC5B5, {0xFA, 0xF0}}, {0xC5B6, {0xFA, 0xF1}}, {0xC5D5, {0xFA, 0xF3}},
0188     {0xC6B8, {0xFA, 0xF4}}, {0xC6D7, {0xFA, 0xF5}}, {0xC6E0, {0xFA, 0xF6}},
0189     {0xC6E3, {0xFA, 0xF8}}, {0xC6EA, {0xFA, 0xF7}}, {0xC7A1, {0xFA, 0xF9}},
0190     {0xC7AB, {0xFA, 0xFA}}, {0xC7C3, {0xFA, 0xFC}}, {0xC7C7, {0xFA, 0xFB}},
0191     {0xC7CB, {0xFB, 0x40}}, {0xC7CF, {0xFB, 0x41}}, {0xC7D9, {0xFB, 0x42}},
0192     {0xC7E6, {0xFB, 0x45}}, {0xC7EB, {0xFB, 0x48}}, {0xC7EE, {0xFB, 0x46}},
0193     {0xC7F0, {0xFB, 0x49}}, {0xC7FC, {0xFB, 0x47}}, {0xC8B1, {0xFB, 0x4A}},
0194     {0xC8E5, {0xFB, 0x4B}}, {0xC8F8, {0xFB, 0x4C}}, {0xC9A6, {0xFB, 0x4D}},
0195     {0xC9AB, {0xFB, 0x4E}}, {0xC9AD, {0xFB, 0x4F}}, {0xC9CA, {0xFB, 0x51}},
0196     {0xC9D3, {0xFB, 0x52}}, {0xC9E3, {0xFB, 0x54}}, {0xC9E9, {0xFB, 0x53}},
0197     {0xC9F4, {0xFB, 0x56}}, {0xC9F5, {0xFB, 0x57}}, {0xC9FC, {0xFB, 0x55}},
0198     {0xCAB3, {0xFB, 0x59}}, {0xCABD, {0xFB, 0x5A}}, {0xCAEF, {0xFB, 0x5B}},
0199     {0xCAF1, {0xFB, 0x5C}}, {0xCBAE, {0xFB, 0x5D}}, {0xCBCA, {0xFB, 0x5F}},
0200     {0xCBE6, {0xFB, 0x60}}, {0xCBEA, {0xFB, 0x61}}, {0xCBEE, {0xFB, 0x64}},
0201     {0xCBF0, {0xFB, 0x62}}, {0xCBF4, {0xFB, 0x63}}, {0xCBF9, {0xFB, 0x66}},
0202     {0xCCA5, {0xFB, 0x65}}, {0xCCAB, {0xFB, 0x67}}, {0xCCAD, {0xFB, 0x69}},
0203     {0xCCAE, {0xFB, 0x68}}, {0xCCB2, {0xFB, 0x6A}}, {0xCCC2, {0xFB, 0x6B}},
0204     {0xCCD0, {0xFB, 0x6C}}, {0xCCD9, {0xFB, 0x6D}}, {0xCDAA, {0xFA, 0xA8}},
0205     {0xCDBB, {0xFB, 0x6F}}, {0xCEBA, {0xFB, 0x73}}, {0xCEBB, {0xFB, 0x71}},
0206     {0xCEC3, {0xFB, 0x74}}, {0xCEF2, {0xFB, 0x76}}, {0xCFD5, {0xFB, 0x78}},
0207     {0xCFE2, {0xFB, 0x79}}, {0xCFE9, {0xFB, 0x7A}}, {0xCFED, {0xFB, 0x7B}},
0208     {0xD0E5, {0xFB, 0x81}}, {0xD0E9, {0xFB, 0x83}}, {0xD1E8, {0xFB, 0x84}},
0209     {0xD1EC, {0xFB, 0x87}}, {0xD2BB, {0xFB, 0x88}}, {0xD3E1, {0xFB, 0x8A}},
0210     {0xD3E8, {0xFB, 0x8B}}, {0xD4A7, {0xFB, 0x8C}}, {0xD4D4, {0xFB, 0x8F}},
0211     {0xD4E3, {0xFA, 0x5C}}, {0xD4F2, {0xFB, 0x90}}, {0xD5AE, {0xFB, 0x91}},
0212     {0xD7DE, {0xFB, 0x93}}, {0xD8A2, {0xFB, 0x95}}, {0xD8B7, {0xFB, 0x96}},
0213     {0xD8C1, {0xFB, 0x97}}, {0xD8D1, {0xFB, 0x98}}, {0xD8F4, {0xFB, 0x99}},
0214     {0xD9A1, {0xFA, 0x60}}, {0xD9C6, {0xFB, 0x9A}}, {0xD9C8, {0xFB, 0x9B}},
0215     {0xD9D1, {0xFB, 0x9C}}, {0xDCD3, {0xFB, 0xA2}}, {0xDCDF, {0xFA, 0x5D}},
0216     {0xDDC8, {0xFB, 0xA3}}, {0xDDD4, {0xFB, 0xA4}}, {0xDDEA, {0xFB, 0xA5}},
0217     {0xDDFA, {0xFB, 0xA6}}, {0xDEA4, {0xFB, 0xA7}}, {0xDEB0, {0xFB, 0xA8}},
0218     {0xDEB5, {0xFB, 0xAA}}, {0xDECB, {0xFB, 0xAB}}, {0xDFB9, {0xFB, 0xAD}},
0219     {0xDFC3, {0xFB, 0xAF}}, {0xE0D9, {0xFB, 0xB2}}, {0xE1E2, {0xFB, 0xB5}},
0220     {0xE2C7, {0xFB, 0xB9}}, {0xE3A6, {0xFB, 0xBB}}, {0xE3A8, {0xFB, 0xBA}},
0221     {0xE3A9, {0xFB, 0xBC}}, {0xE3AA, {0xFB, 0xBF}}, {0xE3AB, {0xFB, 0xC0}},
0222     {0xE3AF, {0xFB, 0xBD}}, {0xE3B0, {0xFB, 0xBE}}, {0xE3BC, {0xFB, 0xC1}},
0223     {0xE3BF, {0xFB, 0xC3}}, {0xE3C1, {0xFB, 0xC2}}, {0xE3D4, {0xFB, 0xCA}},
0224     {0xE3D5, {0xFB, 0xC4}}, {0xE3D6, {0xFB, 0xC6}}, {0xE3D8, {0xFB, 0xC5}},
0225     {0xE3DF, {0xFB, 0xC7}}, {0xE3E1, {0xFB, 0xC9}}, {0xE3E3, {0xFB, 0xC8}},
0226     {0xE3E9, {0xFB, 0xCB}}, {0xE3F1, {0xFB, 0xCD}}, {0xE3F2, {0xFB, 0xCE}},
0227     {0xE3F8, {0xFA, 0x5F}}, {0xE4A6, {0xFB, 0xCC}}, {0xE4BE, {0xFB, 0xD2}},
0228     {0xE4BF, {0xFB, 0xD6}}, {0xE4C0, {0xFB, 0xD4}}, {0xE4C1, {0xFB, 0xD0}},
0229     {0xE4C3, {0xFB, 0xD1}}, {0xE4C7, {0xFB, 0xD5}}, {0xE4CB, {0xFB, 0xCF}},
0230     {0xE4D0, {0xFA, 0x65}}, {0xE4D1, {0xFB, 0xD9}}, {0xE4D2, {0xFB, 0xDC}},
0231     {0xE4D4, {0xFB, 0xDE}}, {0xE4DB, {0xFB, 0xDD}}, {0xE4DC, {0xFB, 0xDB}},
0232     {0xE4DE, {0xFB, 0xD8}}, {0xE4E0, {0xFB, 0xD7}}, {0xE4E9, {0xFA, 0x5E}},
0233     {0xE4EF, {0xFB, 0xE0}}, {0xE4FA, {0xFB, 0xDF}}, {0xE5B3, {0xFB, 0xE1}},
0234     {0xE5BF, {0xFB, 0xE2}}, {0xE5C9, {0xFB, 0xE3}}, {0xE5D0, {0xFB, 0xE4}},
0235     {0xE5E2, {0xFB, 0xE5}}, {0xE5EA, {0xFB, 0xE6}}, {0xE5EB, {0xFB, 0xE7}},
0236     {0xE6E8, {0xFB, 0xEB}}, {0xE6EF, {0xFB, 0xEC}}, {0xE7AC, {0xFB, 0xED}},
0237     {0xE7AE, {0xFB, 0xEF}}, {0xE7B1, {0xFB, 0xF1}}, {0xE7B2, {0xFB, 0xF3}},
0238     {0xE8B1, {0xFB, 0xF4}}, {0xE8B6, {0xFB, 0xF5}}, {0xE8DD, {0xFB, 0xF8}},
0239     {0xE9D1, {0xFB, 0xFB}}, {0xE9ED, {0xFC, 0x40}}, {0xEACD, {0xFC, 0x41}},
0240     {0xEADB, {0xFC, 0x43}}, {0xEAE6, {0xFC, 0x44}}, {0xEAEA, {0xFC, 0x45}},
0241     {0xEBA5, {0xFC, 0x46}}, {0xEBFA, {0xFC, 0x48}}, {0xEBFB, {0xFC, 0x47}},
0242     {0xECD6, {0xFC, 0x4A}},
0243 };
0244 
0245 /* EUC to SJIS IBM extended characters map (G3 Upper block) */
0246 static const unsigned char euc2sjisibm_g3upper_map[][2] = {
0247     {0xFA, 0x40}, {0xFA, 0x41}, {0xFA, 0x42}, {0xFA, 0x43}, {0xFA, 0x44},
0248     {0xFA, 0x45}, {0xFA, 0x46}, {0xFA, 0x47}, {0xFA, 0x48}, {0xFA, 0x49},
0249     {0xFA, 0x4A}, {0xFA, 0x4B}, {0xFA, 0x4C}, {0xFA, 0x4D}, {0xFA, 0x4E},
0250     {0xFA, 0x4F}, {0xFA, 0x50}, {0xFA, 0x51}, {0xFA, 0x52}, {0xFA, 0x53},
0251     {0xFA, 0x56}, {0xFA, 0x57}, {0xFA, 0x58}, {0xFA, 0x59}, {0xFA, 0x5A},
0252     {0xFA, 0x62}, {0xFA, 0x6A}, {0xFA, 0x7C}, {0xFA, 0x83}, {0xFA, 0x8A},
0253     {0xFA, 0x8B}, {0xFA, 0x90}, {0xFA, 0x92}, {0xFA, 0x96}, {0xFA, 0x9B},
0254     {0xFA, 0x9C}, {0xFA, 0x9D}, {0xFA, 0xAA}, {0xFA, 0xAE}, {0xFA, 0xB0},
0255     {0xFA, 0xB1}, {0xFA, 0xBA}, {0xFA, 0xBD}, {0xFA, 0xC1}, {0xFA, 0xCD},
0256     {0xFA, 0xD0}, {0xFA, 0xD5}, {0xFA, 0xD8}, {0xFA, 0xE0}, {0xFA, 0xE5},
0257     {0xFA, 0xE8}, {0xFA, 0xEA}, {0xFA, 0xEE}, {0xFA, 0xF2}, {0xFB, 0x43},
0258     {0xFB, 0x44}, {0xFB, 0x50}, {0xFB, 0x58}, {0xFB, 0x5E}, {0xFB, 0x6E},
0259     {0xFB, 0x70}, {0xFB, 0x72}, {0xFB, 0x75}, {0xFB, 0x7C}, {0xFB, 0x7D},
0260     {0xFB, 0x7E}, {0xFB, 0x80}, {0xFB, 0x82}, {0xFB, 0x85}, {0xFB, 0x86},
0261     {0xFB, 0x89}, {0xFB, 0x8D}, {0xFB, 0x8E}, {0xFB, 0x92}, {0xFB, 0x94},
0262     {0xFB, 0x9D}, {0xFB, 0x9E}, {0xFB, 0x9F}, {0xFB, 0xA0}, {0xFB, 0xA1},
0263     {0xFB, 0xA9}, {0xFB, 0xAC}, {0xFB, 0xAE}, {0xFB, 0xB0}, {0xFB, 0xB1},
0264     {0xFB, 0xB3}, {0xFB, 0xB4}, {0xFB, 0xB6}, {0xFB, 0xB7}, {0xFB, 0xB8},
0265     {0xFB, 0xD3}, {0xFB, 0xDA}, {0xFB, 0xE8}, {0xFB, 0xE9}, {0xFB, 0xEA},
0266     {0xFB, 0xEE}, {0xFB, 0xF0}, {0xFB, 0xF2}, {0xFB, 0xF6}, {0xFB, 0xF7},
0267     {0xFB, 0xF9}, {0xFB, 0xFA}, {0xFB, 0xFC}, {0xFC, 0x42}, {0xFC, 0x49},
0268     {0xFC, 0x4B},
0269 };
0270 
0271 static inline int sjisibm2euc(unsigned char *euc, const unsigned char sjis_hi,
0272                   const unsigned char sjis_lo);
0273 static inline int euc2sjisibm_jisx0212(unsigned char *sjis, const unsigned char euc_hi,
0274                        const unsigned char euc_lo);
0275 static inline int euc2sjisibm_g3upper(unsigned char *sjis, const unsigned char euc_hi,
0276                       const unsigned char euc_lo);
0277 static inline int euc2sjisibm(unsigned char *sjis, const unsigned char euc_hi,
0278                   const unsigned char euc_lo);
0279 static inline int sjisnec2sjisibm(unsigned char *sjisibm,
0280                   const unsigned char sjisnec_hi,
0281                   const unsigned char sjisnec_lo);
0282 
0283 /* SJIS IBM extended characters to EUC */
0284 static inline int sjisibm2euc(unsigned char *euc, const unsigned char sjis_hi,
0285                   const unsigned char sjis_lo)
0286 {
0287     int index;
0288 
0289     index = ((sjis_hi - 0xFA) * (0xFD - 0x40)) + (sjis_lo - 0x40);
0290     if (IS_EUC_IBM2JISX0208(sjisibm2euc_map[index][0],
0291                 sjisibm2euc_map[index][1])) {
0292         euc[0] = sjisibm2euc_map[index][0];
0293         euc[1] = sjisibm2euc_map[index][1];
0294         return 2;
0295     } else {
0296         euc[0] = SS3;
0297         euc[1] = sjisibm2euc_map[index][0];
0298         euc[2] = sjisibm2euc_map[index][1];
0299         return 3;
0300     }
0301 }
0302 
0303 /* EUC to SJIS IBM extended characters (G3 JIS X 0212 block) */
0304 static inline int euc2sjisibm_jisx0212(unsigned char *sjis, const unsigned char euc_hi,
0305                        const unsigned char euc_lo)
0306 {
0307     int index, min_index, max_index;
0308     unsigned short euc;
0309 
0310     min_index = 0;
0311     max_index = ARRAY_SIZE(euc2sjisibm_jisx0212_map) - 1;
0312     euc = (euc_hi << 8) | euc_lo;
0313 
0314     while (min_index <= max_index) {
0315         index = (min_index + max_index) / 2;
0316         if (euc < euc2sjisibm_jisx0212_map[index].euc)
0317             max_index = index - 1;
0318         else
0319             min_index = index + 1;
0320         if (euc == euc2sjisibm_jisx0212_map[index].euc) {
0321             sjis[0] = euc2sjisibm_jisx0212_map[index].sjis[0];
0322             sjis[1] = euc2sjisibm_jisx0212_map[index].sjis[1];
0323             return 3;
0324         }
0325     }
0326     return 0;
0327 }
0328 
0329 /* EUC to SJIS IBM extended characters (G3 Upper block) */
0330 static inline int euc2sjisibm_g3upper(unsigned char *sjis, const unsigned char euc_hi,
0331                       const unsigned char euc_lo)
0332 {
0333     int index;
0334 
0335     if (euc_hi == 0xF3)
0336         index = ((euc_hi << 8) | euc_lo) - 0xF3F3;
0337     else
0338         index = ((euc_hi << 8) | euc_lo) - 0xF4A1 + 12;
0339 
0340     if ((index < 0) || (index >= ARRAY_SIZE(euc2sjisibm_g3upper_map)))
0341         return 0;
0342 
0343     sjis[0] = euc2sjisibm_g3upper_map[index][0];
0344     sjis[1] = euc2sjisibm_g3upper_map[index][1];
0345 
0346     return 3;
0347 }
0348 
0349 /* EUC to SJIS IBM extended characters (G3 block) */
0350 static inline int euc2sjisibm(unsigned char *sjis, const unsigned char euc_hi,
0351                   const unsigned char euc_lo)
0352 {
0353     int n;
0354 
0355 #if 0
0356     if ((euc_hi == 0xA2) && (euc_lo == 0xCC)) {
0357         sjis[0] = 0xFA;
0358         sjis[1] = 0x54;
0359         return 2;
0360     } else if ((euc_hi == 0xA2) && (euc_lo == 0xE8)) {
0361         sjis[0] = 0xFA;
0362         sjis[1] = 0x5B;
0363         return 2;
0364     }
0365 #endif
0366     if ((n = euc2sjisibm_g3upper(sjis, euc_hi, euc_lo))) {
0367         return n;
0368     } else if ((n = euc2sjisibm_jisx0212(sjis, euc_hi, euc_lo))) {
0369         return n;
0370     }
0371 
0372     return 0;
0373 }
0374 
0375 /* NEC/IBM extended characters to IBM extended characters */
0376 static inline int sjisnec2sjisibm(unsigned char *sjisibm,
0377                   const unsigned char sjisnec_hi,
0378                   const unsigned char sjisnec_lo)
0379 {
0380     int count;
0381 
0382     if (! IS_SJIS_NECIBM(sjisnec_hi, sjisnec_lo))
0383         return 0;
0384 
0385     if ((sjisnec_hi == 0xEE) && (sjisnec_lo == 0xF9)) {
0386         sjisibm[0] = 0x81;
0387         sjisibm[1] = 0xCA;
0388         return 2;
0389     }
0390 
0391     if ((sjisnec_hi == 0xEE) && (sjisnec_lo >= 0xEF)) {
0392         count = (sjisnec_hi << 8 | sjisnec_lo)
0393             - (sjisnec_lo <= 0xF9 ? 0xEEEF : (0xEEEF - 10));
0394     } else {
0395         count = (sjisnec_hi - 0xED) * (0xFC - 0x40)
0396             + (sjisnec_lo - 0x40) + (0x5C - 0x40);
0397         if (sjisnec_lo >= 0x7F)
0398             count--;
0399     }
0400 
0401     sjisibm[0] = 0xFA + (count / (0xFC - 0x40));
0402     sjisibm[1] = 0x40 + (count % (0xFC - 0x40));
0403     if (sjisibm[1] >= 0x7F)
0404         sjisibm[1]++;
0405 
0406     return 2;
0407 }
0408 
0409 static int uni2char(const wchar_t uni,
0410             unsigned char *out, int boundlen)
0411 {
0412     int n;
0413 
0414     if (!p_nls)
0415         return -EINVAL;
0416     if ((n = p_nls->uni2char(uni, out, boundlen)) < 0)
0417         return n;
0418 
0419     /* translate SJIS into EUC-JP */
0420     if (n == 1) {
0421         if (IS_SJIS_JISX0201KANA(out[0])) {
0422             /* JIS X 0201 KANA */
0423             if (boundlen < 2)
0424                 return -ENAMETOOLONG;
0425 
0426             out[1] = out[0];
0427             out[0] = SS2;
0428             return 2;
0429         }
0430     } else if (n == 2) {
0431         /* NEC/IBM extended characters to IBM extended characters */
0432         sjisnec2sjisibm(out, out[0], out[1]);
0433 
0434         if (IS_SJIS_UDC_LOW(out[0], out[1])) {
0435             /* User defined characters half low */
0436             MAP_SJIS2EUC(out[0], out[1], 0xF0, out[0], out[1], 0xF5);
0437         } else if (IS_SJIS_UDC_HI(out[0], out[1])) {
0438             /* User defined characters half high */
0439             unsigned char ch, cl;
0440 
0441             if (boundlen < 3)
0442                 return -ENAMETOOLONG;
0443 
0444             n = 3; ch = out[0]; cl = out[1];
0445             out[0] = SS3;
0446             MAP_SJIS2EUC(ch, cl, 0xF5, out[1], out[2], 0xF5);
0447         } else if (IS_SJIS_IBM(out[0], out[1])) {
0448             /* IBM extended characters */
0449             unsigned char euc[3], i;
0450 
0451             n = sjisibm2euc(euc, out[0], out[1]);
0452             if (boundlen < n)
0453                 return -ENAMETOOLONG;
0454             for (i = 0; i < n; i++)
0455                 out[i] = euc[i];
0456         } else if (IS_SJIS_JISX0208(out[0], out[1])) {
0457             /* JIS X 0208 (include NEC special characters) */
0458             out[0] = (out[0]^0xA0)*2 + 0x5F;
0459             if (out[1] > 0x9E)
0460                 out[0]++;
0461 
0462             if (out[1] < 0x7F)
0463                 out[1] = out[1] + 0x61;
0464             else if (out[1] < 0x9F)
0465                 out[1] = out[1] + 0x60;
0466             else
0467                 out[1] = out[1] + 0x02;
0468         } else {
0469             /* Invalid characters */
0470             return -EINVAL;
0471         }
0472     }
0473     else
0474         return -EINVAL;
0475 
0476     return n;
0477 }
0478 
0479 static int char2uni(const unsigned char *rawstring, int boundlen,
0480             wchar_t *uni)
0481 {
0482     unsigned char sjis_temp[2];
0483     int euc_offset, n;
0484 
0485     if ( !p_nls )
0486         return -EINVAL;
0487     if (boundlen <= 0)
0488         return -ENAMETOOLONG;
0489 
0490     /* translate EUC-JP into SJIS */
0491     if (rawstring[0] > 0x7F) {
0492         if (rawstring[0] == SS3) {
0493             if (boundlen < 3)
0494                 return -EINVAL;
0495             euc_offset = 3;
0496 
0497             if (IS_EUC_UDC_HI(rawstring[1], rawstring[2])) {
0498                 /* User defined characters half high */
0499                 MAP_EUC2SJIS(rawstring[1], rawstring[2], 0xF5,
0500                          sjis_temp[0], sjis_temp[1], 0xF5);
0501             } else if (euc2sjisibm(sjis_temp,rawstring[1],rawstring[2])) {
0502                 /* IBM extended characters */
0503             } else {
0504                 /* JIS X 0212 and Invalid characters*/
0505                 return -EINVAL;
0506 
0507                 /* 'GETA' with SJIS coding */
0508                 /* sjis_temp[0] = 0x81; */
0509                 /* sjis_temp[1] = 0xAC; */
0510             }
0511         } else {
0512             if (boundlen < 2)
0513                 return -EINVAL;
0514             euc_offset = 2;
0515 
0516             if (IS_EUC_JISX0201KANA(rawstring[0], rawstring[1])) {
0517                 /* JIS X 0201 KANA */
0518                 sjis_temp[0] = rawstring[1];
0519                 sjis_temp[1] = 0x00;
0520             } else if (IS_EUC_UDC_LOW(rawstring[0], rawstring[1])) {
0521                 /* User defined characters half low */
0522                 MAP_EUC2SJIS(rawstring[0], rawstring[1], 0xF5,
0523                          sjis_temp[0], sjis_temp[1], 0xF0);
0524             } else if (IS_EUC_JISX0208(rawstring[0], rawstring[1])) {
0525                 /* JIS X 0208 (include NEC spesial characters) */
0526                 sjis_temp[0] = ((rawstring[0]-0x5f)/2) ^ 0xA0;
0527                 if (!(rawstring[0] & 1))
0528                     sjis_temp[1] = rawstring[1] - 0x02;
0529                 else if (rawstring[1] < 0xE0)
0530                     sjis_temp[1] = rawstring[1] - 0x61;
0531                 else
0532                     sjis_temp[1] = rawstring[1] - 0x60;
0533             } else {
0534                 /* Invalid characters */
0535                 return -EINVAL;
0536             }
0537         }
0538     } else {
0539         euc_offset = 1;
0540 
0541         /* JIS X 0201 ROMAJI */
0542         sjis_temp[0] = rawstring[0];
0543         sjis_temp[1] = 0x00;
0544     }
0545 
0546     if ( (n = p_nls->char2uni(sjis_temp, sizeof(sjis_temp), uni)) < 0)
0547         return n;
0548 
0549     return euc_offset;
0550 }
0551 
0552 static struct nls_table table = {
0553     .charset    = "euc-jp",
0554     .uni2char   = uni2char,
0555     .char2uni   = char2uni,
0556 };
0557 
0558 static int __init init_nls_euc_jp(void)
0559 {
0560     p_nls = load_nls("cp932");
0561 
0562     if (p_nls) {
0563         table.charset2upper = p_nls->charset2upper;
0564         table.charset2lower = p_nls->charset2lower;
0565         return register_nls(&table);
0566     }
0567 
0568     return -EINVAL;
0569 }
0570 
0571 static void __exit exit_nls_euc_jp(void)
0572 {
0573     unregister_nls(&table);
0574     unload_nls(p_nls);
0575 }
0576 
0577 module_init(init_nls_euc_jp)
0578 module_exit(exit_nls_euc_jp)
0579 
0580 MODULE_LICENSE("Dual BSD/GPL");
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