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0010 #include <linux/module.h>
0011 #include <linux/kernel.h>
0012 #include <linux/string.h>
0013 #include <linux/nls.h>
0014 #include <linux/errno.h>
0015
0016 static const wchar_t charset2uni[256] = {
0017
0018 0x0000, 0x0001, 0x0002, 0x0003,
0019 0x0004, 0x0005, 0x0006, 0x0007,
0020 0x0008, 0x0009, 0x000a, 0x000b,
0021 0x000c, 0x000d, 0x000e, 0x000f,
0022
0023 0x0010, 0x0011, 0x0012, 0x0013,
0024 0x0014, 0x0015, 0x0016, 0x0017,
0025 0x0018, 0x0019, 0x001a, 0x001b,
0026 0x001c, 0x001d, 0x001e, 0x001f,
0027
0028 0x0020, 0x0021, 0x0022, 0x0023,
0029 0x0024, 0x0025, 0x0026, 0x0027,
0030 0x0028, 0x0029, 0x002a, 0x002b,
0031 0x002c, 0x002d, 0x002e, 0x002f,
0032
0033 0x0030, 0x0031, 0x0032, 0x0033,
0034 0x0034, 0x0035, 0x0036, 0x0037,
0035 0x0038, 0x0039, 0x003a, 0x003b,
0036 0x003c, 0x003d, 0x003e, 0x003f,
0037
0038 0x0040, 0x0041, 0x0042, 0x0043,
0039 0x0044, 0x0045, 0x0046, 0x0047,
0040 0x0048, 0x0049, 0x004a, 0x004b,
0041 0x004c, 0x004d, 0x004e, 0x004f,
0042
0043 0x0050, 0x0051, 0x0052, 0x0053,
0044 0x0054, 0x0055, 0x0056, 0x0057,
0045 0x0058, 0x0059, 0x005a, 0x005b,
0046 0x005c, 0x005d, 0x005e, 0x005f,
0047
0048 0x0060, 0x0061, 0x0062, 0x0063,
0049 0x0064, 0x0065, 0x0066, 0x0067,
0050 0x0068, 0x0069, 0x006a, 0x006b,
0051 0x006c, 0x006d, 0x006e, 0x006f,
0052
0053 0x0070, 0x0071, 0x0072, 0x0073,
0054 0x0074, 0x0075, 0x0076, 0x0077,
0055 0x0078, 0x0079, 0x007a, 0x007b,
0056 0x007c, 0x007d, 0x007e, 0x007f,
0057
0058 0x00c7, 0x00fc, 0x00e9, 0x00e2,
0059 0x00e4, 0x00e0, 0x00e5, 0x00e7,
0060 0x00ea, 0x00eb, 0x00e8, 0x00ef,
0061 0x00ee, 0x0131, 0x00c4, 0x00c5,
0062
0063 0x00c9, 0x00e6, 0x00c6, 0x00f4,
0064 0x00f6, 0x00f2, 0x00fb, 0x00f9,
0065 0x0130, 0x00d6, 0x00dc, 0x00f8,
0066 0x00a3, 0x00d8, 0x015e, 0x015f,
0067
0068 0x00e1, 0x00ed, 0x00f3, 0x00fa,
0069 0x00f1, 0x00d1, 0x011e, 0x011f,
0070 0x00bf, 0x00ae, 0x00ac, 0x00bd,
0071 0x00bc, 0x00a1, 0x00ab, 0x00bb,
0072
0073 0x2591, 0x2592, 0x2593, 0x2502,
0074 0x2524, 0x00c1, 0x00c2, 0x00c0,
0075 0x00a9, 0x2563, 0x2551, 0x2557,
0076 0x255d, 0x00a2, 0x00a5, 0x2510,
0077
0078 0x2514, 0x2534, 0x252c, 0x251c,
0079 0x2500, 0x253c, 0x00e3, 0x00c3,
0080 0x255a, 0x2554, 0x2569, 0x2566,
0081 0x2560, 0x2550, 0x256c, 0x00a4,
0082
0083 0x00ba, 0x00aa, 0x00ca, 0x00cb,
0084 0x00c8, 0x0000, 0x00cd, 0x00ce,
0085 0x00cf, 0x2518, 0x250c, 0x2588,
0086 0x2584, 0x00a6, 0x00cc, 0x2580,
0087
0088 0x00d3, 0x00df, 0x00d4, 0x00d2,
0089 0x00f5, 0x00d5, 0x00b5, 0x0000,
0090 0x00d7, 0x00da, 0x00db, 0x00d9,
0091 0x00ec, 0x00ff, 0x00af, 0x00b4,
0092
0093 0x00ad, 0x00b1, 0x0000, 0x00be,
0094 0x00b6, 0x00a7, 0x00f7, 0x00b8,
0095 0x00b0, 0x00a8, 0x00b7, 0x00b9,
0096 0x00b3, 0x00b2, 0x25a0, 0x00a0,
0097 };
0098
0099 static const unsigned char page00[256] = {
0100 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0101 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
0102 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0103 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
0104 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
0105 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0106 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
0107 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
0108 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0109 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
0110 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
0111 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
0112 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0113 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
0114 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0115 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
0116
0117 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0118 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0119 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0120 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0121 0xff, 0xad, 0xbd, 0x9c, 0xcf, 0xbe, 0xdd, 0xf5,
0122 0xf9, 0xb8, 0xd1, 0xae, 0xaa, 0xf0, 0xa9, 0xee,
0123 0xf8, 0xf1, 0xfd, 0xfc, 0xef, 0xe6, 0xf4, 0xfa,
0124 0xf7, 0xfb, 0xd0, 0xaf, 0xac, 0xab, 0xf3, 0xa8,
0125 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80,
0126 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8,
0127 0x00, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0xe8,
0128 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0x00, 0x00, 0xe1,
0129 0x85, 0xa0, 0x83, 0xc6, 0x84, 0x86, 0x91, 0x87,
0130 0x8a, 0x82, 0x88, 0x89, 0xec, 0xa1, 0x8c, 0x8b,
0131 0x00, 0xa4, 0x95, 0xa2, 0x93, 0xe4, 0x94, 0xf6,
0132 0x9b, 0x97, 0xa3, 0x96, 0x81, 0x00, 0x00, 0xed,
0133 };
0134
0135 static const unsigned char page01[256] = {
0136 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0137 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0138 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0139 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa6, 0xa7,
0140 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0141 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0142 0x98, 0x8d, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0143 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0144 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0145 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0146 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0147 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x9e, 0x9f,
0148 };
0149
0150 static const unsigned char page25[256] = {
0151 0xc4, 0x00, 0xb3, 0x00, 0x00, 0x00, 0x00, 0x00,
0152 0x00, 0x00, 0x00, 0x00, 0xda, 0x00, 0x00, 0x00,
0153 0xbf, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00,
0154 0xd9, 0x00, 0x00, 0x00, 0xc3, 0x00, 0x00, 0x00,
0155 0x00, 0x00, 0x00, 0x00, 0xb4, 0x00, 0x00, 0x00,
0156 0x00, 0x00, 0x00, 0x00, 0xc2, 0x00, 0x00, 0x00,
0157 0x00, 0x00, 0x00, 0x00, 0xc1, 0x00, 0x00, 0x00,
0158 0x00, 0x00, 0x00, 0x00, 0xc5, 0x00, 0x00, 0x00,
0159 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0160 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0161 0xcd, 0xba, 0x00, 0x00, 0xc9, 0x00, 0x00, 0xbb,
0162 0x00, 0x00, 0xc8, 0x00, 0x00, 0xbc, 0x00, 0x00,
0163 0xcc, 0x00, 0x00, 0xb9, 0x00, 0x00, 0xcb, 0x00,
0164 0x00, 0xca, 0x00, 0x00, 0xce, 0x00, 0x00, 0x00,
0165 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0166 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0167
0168 0xdf, 0x00, 0x00, 0x00, 0xdc, 0x00, 0x00, 0x00,
0169 0xdb, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0170 0x00, 0xb0, 0xb1, 0xb2, 0x00, 0x00, 0x00, 0x00,
0171 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0172 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0173 };
0174
0175 static const unsigned char *const page_uni2charset[256] = {
0176 page00, page01, NULL, NULL, NULL, NULL, NULL, NULL,
0177 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
0178 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
0179 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
0180 NULL, NULL, NULL, NULL, NULL, page25, NULL, NULL,
0181 };
0182
0183 static const unsigned char charset2lower[256] = {
0184 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0185 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
0186 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0187 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
0188 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
0189 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0190 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
0191 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
0192 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0193 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
0194 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0195 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
0196 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0197 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
0198 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0199 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
0200
0201 0x87, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0202 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x84, 0x86,
0203 0x82, 0x91, 0x91, 0x93, 0x94, 0x95, 0x96, 0x97,
0204 0x69, 0x94, 0x81, 0x9b, 0x9c, 0x9b, 0x9f, 0x9f,
0205 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa4, 0xa7, 0xa7,
0206 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
0207 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xa0, 0x83, 0x85,
0208 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
0209 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc6,
0210 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
0211 0xd0, 0xd1, 0x88, 0x89, 0x8a, 0x00, 0xa1, 0x8c,
0212 0x8b, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xec, 0xdf,
0213 0xa2, 0xe1, 0x93, 0x95, 0xe4, 0xe4, 0xe6, 0x00,
0214 0xe8, 0xa3, 0x96, 0x97, 0xec, 0xed, 0xee, 0xef,
0215 0xf0, 0xf1, 0x00, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
0216 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
0217 };
0218
0219 static const unsigned char charset2upper[256] = {
0220 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0221 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
0222 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0223 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
0224 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
0225 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0226 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
0227 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
0228 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0229 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
0230 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
0231 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
0232 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0233 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
0234 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
0235 0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
0236
0237 0x80, 0x9a, 0x90, 0xb6, 0x8e, 0xb7, 0x8f, 0x80,
0238 0xd2, 0xd3, 0xd4, 0xd8, 0xd7, 0x49, 0x8e, 0x8f,
0239 0x90, 0x92, 0x92, 0xe2, 0x99, 0xe3, 0xea, 0xeb,
0240 0x98, 0x99, 0x9a, 0x9d, 0x9c, 0x9d, 0x9e, 0x9e,
0241 0xb5, 0xd6, 0xe0, 0xe9, 0xa5, 0xa5, 0xa6, 0xa6,
0242 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
0243 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
0244 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
0245 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc7, 0xc7,
0246 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
0247 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0x00, 0xd6, 0xd7,
0248 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
0249 0xe0, 0xe1, 0xe2, 0xe3, 0xe5, 0xe5, 0x00, 0x00,
0250 0xe8, 0xe9, 0xea, 0xeb, 0xde, 0x00, 0xee, 0xef,
0251 0xf0, 0xf1, 0x00, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
0252 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
0253 };
0254
0255 static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
0256 {
0257 const unsigned char *uni2charset;
0258 unsigned char cl = uni & 0x00ff;
0259 unsigned char ch = (uni & 0xff00) >> 8;
0260
0261 if (boundlen <= 0)
0262 return -ENAMETOOLONG;
0263
0264 uni2charset = page_uni2charset[ch];
0265 if (uni2charset && uni2charset[cl])
0266 out[0] = uni2charset[cl];
0267 else
0268 return -EINVAL;
0269 return 1;
0270 }
0271
0272 static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
0273 {
0274 *uni = charset2uni[*rawstring];
0275 if (*uni == 0x0000)
0276 return -EINVAL;
0277 return 1;
0278 }
0279
0280 static struct nls_table table = {
0281 .charset = "cp857",
0282 .uni2char = uni2char,
0283 .char2uni = char2uni,
0284 .charset2lower = charset2lower,
0285 .charset2upper = charset2upper,
0286 };
0287
0288 static int __init init_nls_cp857(void)
0289 {
0290 return register_nls(&table);
0291 }
0292
0293 static void __exit exit_nls_cp857(void)
0294 {
0295 unregister_nls(&table);
0296 }
0297
0298 module_init(init_nls_cp857)
0299 module_exit(exit_nls_cp857)
0300
0301 MODULE_LICENSE("Dual BSD/GPL");