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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, 0x00ec, 0x00c4, 0x00c5,
0062
0063 0x00c9, 0x00e6, 0x00c6, 0x00f4,
0064 0x00f6, 0x00f2, 0x00fb, 0x00f9,
0065 0x00ff, 0x00d6, 0x00dc, 0x00f8,
0066 0x00a3, 0x00d8, 0x00d7, 0x0192,
0067
0068 0x00e1, 0x00ed, 0x00f3, 0x00fa,
0069 0x00f1, 0x00d1, 0x00aa, 0x00ba,
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 0x00f0, 0x00d0, 0x00ca, 0x00cb,
0084 0x00c8, 0x0131, 0x00cd, 0x00ce,
0085 0x00cf, 0x2518, 0x250c, 0x2588,
0086 0x2584, 0x00a6, 0x00cc, 0x2580,
0087
0088 0x00d3, 0x00df, 0x00d4, 0x00d2,
0089 0x00f5, 0x00d5, 0x00b5, 0x00fe,
0090 0x00de, 0x00da, 0x00db, 0x00d9,
0091 0x00fd, 0x00dd, 0x00af, 0x00b4,
0092
0093 0x00ad, 0x00b1, 0x2017, 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, 0xa6, 0xae, 0xaa, 0xf0, 0xa9, 0xee,
0123 0xf8, 0xf1, 0xfd, 0xfc, 0xef, 0xe6, 0xf4, 0xfa,
0124 0xf7, 0xfb, 0xa7, 0xaf, 0xac, 0xab, 0xf3, 0xa8,
0125 0xb7, 0xb5, 0xb6, 0xc7, 0x8e, 0x8f, 0x92, 0x80,
0126 0xd4, 0x90, 0xd2, 0xd3, 0xde, 0xd6, 0xd7, 0xd8,
0127 0xd1, 0xa5, 0xe3, 0xe0, 0xe2, 0xe5, 0x99, 0x9e,
0128 0x9d, 0xeb, 0xe9, 0xea, 0x9a, 0xed, 0xe8, 0xe1,
0129 0x85, 0xa0, 0x83, 0xc6, 0x84, 0x86, 0x91, 0x87,
0130 0x8a, 0x82, 0x88, 0x89, 0x8d, 0xa1, 0x8c, 0x8b,
0131 0xd0, 0xa4, 0x95, 0xa2, 0x93, 0xe4, 0x94, 0xf6,
0132 0x9b, 0x97, 0xa3, 0x96, 0x81, 0xec, 0xe7, 0x98,
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, 0x00, 0x00,
0140 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0141 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0142 0x00, 0xd5, 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, 0x00, 0x00,
0148 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0149 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0150 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0151 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0152
0153 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0154 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0155 0x00, 0x00, 0x9f, 0x00, 0x00, 0x00, 0x00, 0x00,
0156 };
0157
0158 static const unsigned char page20[256] = {
0159 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0160 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0161 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xf2,
0162 };
0163
0164 static const unsigned char page25[256] = {
0165 0xc4, 0x00, 0xb3, 0x00, 0x00, 0x00, 0x00, 0x00,
0166 0x00, 0x00, 0x00, 0x00, 0xda, 0x00, 0x00, 0x00,
0167 0xbf, 0x00, 0x00, 0x00, 0xc0, 0x00, 0x00, 0x00,
0168 0xd9, 0x00, 0x00, 0x00, 0xc3, 0x00, 0x00, 0x00,
0169 0x00, 0x00, 0x00, 0x00, 0xb4, 0x00, 0x00, 0x00,
0170 0x00, 0x00, 0x00, 0x00, 0xc2, 0x00, 0x00, 0x00,
0171 0x00, 0x00, 0x00, 0x00, 0xc1, 0x00, 0x00, 0x00,
0172 0x00, 0x00, 0x00, 0x00, 0xc5, 0x00, 0x00, 0x00,
0173 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0174 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0175 0xcd, 0xba, 0x00, 0x00, 0xc9, 0x00, 0x00, 0xbb,
0176 0x00, 0x00, 0xc8, 0x00, 0x00, 0xbc, 0x00, 0x00,
0177 0xcc, 0x00, 0x00, 0xb9, 0x00, 0x00, 0xcb, 0x00,
0178 0x00, 0xca, 0x00, 0x00, 0xce, 0x00, 0x00, 0x00,
0179 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0180 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0181
0182 0xdf, 0x00, 0x00, 0x00, 0xdc, 0x00, 0x00, 0x00,
0183 0xdb, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0184 0x00, 0xb0, 0xb1, 0xb2, 0x00, 0x00, 0x00, 0x00,
0185 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0186 0xfe, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0187 };
0188
0189 static const unsigned char *const page_uni2charset[256] = {
0190 page00, page01, NULL, NULL, NULL, NULL, NULL, NULL,
0191 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
0192 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
0193 NULL, NULL, NULL, NULL, NULL, NULL, NULL, NULL,
0194 page20, NULL, NULL, NULL, NULL, page25, NULL, NULL,
0195 };
0196
0197 static const unsigned char charset2lower[256] = {
0198 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0199 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
0200 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0201 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
0202 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
0203 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0204 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
0205 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
0206 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0207 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
0208 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0209 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
0210 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0211 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
0212 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0213 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
0214
0215 0x87, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0216 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x84, 0x86,
0217 0x82, 0x91, 0x91, 0x93, 0x94, 0x95, 0x96, 0x97,
0218 0x98, 0x94, 0x81, 0x9b, 0x9c, 0x9b, 0x9e, 0x9f,
0219 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa4, 0xa6, 0xa7,
0220 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
0221 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xa0, 0x83, 0x85,
0222 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
0223 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc6,
0224 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
0225 0xd0, 0xd0, 0x88, 0x89, 0x8a, 0xd5, 0xa1, 0x8c,
0226 0x8b, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0x8d, 0xdf,
0227 0xa2, 0xe1, 0x93, 0x95, 0xe4, 0xe4, 0xe6, 0xe7,
0228 0xe7, 0xa3, 0x96, 0x97, 0xec, 0xec, 0xee, 0xef,
0229 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
0230 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
0231 };
0232
0233 static const unsigned char charset2upper[256] = {
0234 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0235 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
0236 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0237 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
0238 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
0239 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0240 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
0241 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
0242 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0243 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
0244 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
0245 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
0246 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0247 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
0248 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
0249 0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
0250
0251 0x80, 0x9a, 0x90, 0xb6, 0x8e, 0xb7, 0x8f, 0x80,
0252 0xd2, 0xd3, 0xd4, 0xd8, 0xd7, 0xde, 0x8e, 0x8f,
0253 0x90, 0x92, 0x92, 0xe2, 0x99, 0xe3, 0xea, 0xeb,
0254 0x00, 0x99, 0x9a, 0x9d, 0x9c, 0x9d, 0x9e, 0x00,
0255 0xb5, 0xd6, 0xe0, 0xe9, 0xa5, 0xa5, 0xa6, 0xa7,
0256 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
0257 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
0258 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbd, 0xbe, 0xbf,
0259 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc7, 0xc7,
0260 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
0261 0xd1, 0xd1, 0xd2, 0xd3, 0xd4, 0x49, 0xd6, 0xd7,
0262 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
0263 0xe0, 0xe1, 0xe2, 0xe3, 0xe5, 0xe5, 0x00, 0xe8,
0264 0xe8, 0xe9, 0xea, 0xeb, 0xed, 0xed, 0xee, 0xef,
0265 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
0266 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
0267 };
0268
0269 static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
0270 {
0271 const unsigned char *uni2charset;
0272 unsigned char cl = uni & 0x00ff;
0273 unsigned char ch = (uni & 0xff00) >> 8;
0274
0275 if (boundlen <= 0)
0276 return -ENAMETOOLONG;
0277
0278 uni2charset = page_uni2charset[ch];
0279 if (uni2charset && uni2charset[cl])
0280 out[0] = uni2charset[cl];
0281 else
0282 return -EINVAL;
0283 return 1;
0284 }
0285
0286 static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
0287 {
0288 *uni = charset2uni[*rawstring];
0289 if (*uni == 0x0000)
0290 return -EINVAL;
0291 return 1;
0292 }
0293
0294 static struct nls_table table = {
0295 .charset = "cp850",
0296 .uni2char = uni2char,
0297 .char2uni = char2uni,
0298 .charset2lower = charset2lower,
0299 .charset2upper = charset2upper,
0300 };
0301
0302 static int __init init_nls_cp850(void)
0303 {
0304 return register_nls(&table);
0305 }
0306
0307 static void __exit exit_nls_cp850(void)
0308 {
0309 unregister_nls(&table);
0310 }
0311
0312 module_init(init_nls_cp850)
0313 module_exit(exit_nls_cp850)
0314
0315 MODULE_LICENSE("Dual BSD/GPL");