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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 0x0080, 0x0081, 0x0082, 0x0083,
0059 0x0084, 0x0085, 0x0086, 0x0087,
0060 0x0088, 0x0089, 0x008a, 0x008b,
0061 0x008c, 0x008d, 0x008e, 0x008f,
0062
0063 0x0090, 0x0091, 0x0092, 0x0093,
0064 0x0094, 0x0095, 0x0096, 0x0097,
0065 0x0098, 0x0099, 0x009a, 0x009b,
0066 0x009c, 0x009d, 0x009e, 0x009f,
0067
0068 0x00a0, 0x0104, 0x0138, 0x0156,
0069 0x00a4, 0x0128, 0x013b, 0x00a7,
0070 0x00a8, 0x0160, 0x0112, 0x0122,
0071 0x0166, 0x00ad, 0x017d, 0x00af,
0072
0073 0x00b0, 0x0105, 0x02db, 0x0157,
0074 0x00b4, 0x0129, 0x013c, 0x02c7,
0075 0x00b8, 0x0161, 0x0113, 0x0123,
0076 0x0167, 0x014a, 0x017e, 0x014b,
0077
0078 0x0100, 0x00c1, 0x00c2, 0x00c3,
0079 0x00c4, 0x00c5, 0x00c6, 0x012e,
0080 0x010c, 0x00c9, 0x0118, 0x00cb,
0081 0x0116, 0x00cd, 0x00ce, 0x012a,
0082
0083 0x0110, 0x0145, 0x014c, 0x0136,
0084 0x00d4, 0x00d5, 0x00d6, 0x00d7,
0085 0x00d8, 0x0172, 0x00da, 0x00db,
0086 0x00dc, 0x0168, 0x016a, 0x00df,
0087
0088 0x0101, 0x00e1, 0x00e2, 0x00e3,
0089 0x00e4, 0x00e5, 0x00e6, 0x012f,
0090 0x010d, 0x00e9, 0x0119, 0x00eb,
0091 0x0117, 0x00ed, 0x00ee, 0x012b,
0092
0093 0x0111, 0x0146, 0x014d, 0x0137,
0094 0x00f4, 0x00f5, 0x00f6, 0x00f7,
0095 0x00f8, 0x0173, 0x00fa, 0x00fb,
0096 0x00fc, 0x0169, 0x016b, 0x02d9,
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 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0118 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
0119 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
0120 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
0121 0xa0, 0x00, 0x00, 0x00, 0xa4, 0x00, 0x00, 0xa7,
0122 0xa8, 0x00, 0x00, 0x00, 0x00, 0xad, 0x00, 0xaf,
0123 0xb0, 0x00, 0x00, 0x00, 0xb4, 0x00, 0x00, 0x00,
0124 0xb8, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0125 0x00, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0x00,
0126 0x00, 0xc9, 0x00, 0xcb, 0x00, 0xcd, 0xce, 0x00,
0127 0x00, 0x00, 0x00, 0x00, 0xd4, 0xd5, 0xd6, 0xd7,
0128 0xd8, 0x00, 0xda, 0xdb, 0xdc, 0x00, 0x00, 0xdf,
0129 0x00, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0x00,
0130 0x00, 0xe9, 0x00, 0xeb, 0x00, 0xed, 0xee, 0x00,
0131 0x00, 0x00, 0x00, 0x00, 0xf4, 0xf5, 0xf6, 0xf7,
0132 0xf8, 0x00, 0xfa, 0xfb, 0xfc, 0x00, 0x00, 0x00,
0133 };
0134
0135 static const unsigned char page01[256] = {
0136 0xc0, 0xe0, 0x00, 0x00, 0xa1, 0xb1, 0x00, 0x00,
0137 0x00, 0x00, 0x00, 0x00, 0xc8, 0xe8, 0x00, 0x00,
0138 0xd0, 0xf0, 0xaa, 0xba, 0x00, 0x00, 0xcc, 0xec,
0139 0xca, 0xea, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0140 0x00, 0x00, 0xab, 0xbb, 0x00, 0x00, 0x00, 0x00,
0141 0xa5, 0xb5, 0xcf, 0xef, 0x00, 0x00, 0xc7, 0xe7,
0142 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xd3, 0xf3,
0143 0xa2, 0x00, 0x00, 0xa6, 0xb6, 0x00, 0x00, 0x00,
0144 0x00, 0x00, 0x00, 0x00, 0x00, 0xd1, 0xf1, 0x00,
0145 0x00, 0x00, 0xbd, 0xbf, 0xd2, 0xf2, 0x00, 0x00,
0146 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xa3, 0xb3,
0147 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0148 0xa9, 0xb9, 0x00, 0x00, 0x00, 0x00, 0xac, 0xbc,
0149 0xdd, 0xfd, 0xde, 0xfe, 0x00, 0x00, 0x00, 0x00,
0150 0x00, 0x00, 0xd9, 0xf9, 0x00, 0x00, 0x00, 0x00,
0151 0x00, 0x00, 0x00, 0x00, 0x00, 0xae, 0xbe, 0x00,
0152 };
0153
0154 static const unsigned char page02[256] = {
0155 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0156 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0157 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0158 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
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, 0x00,
0162 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0163 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0164 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0165 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0166 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0167 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0168 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0169 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0170 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0171
0172 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0173 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0174 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0175 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0176 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0177 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0178 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0179 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0180 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0xb7,
0181 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0182 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
0183 0x00, 0xff, 0x00, 0xb2, 0x00, 0x00, 0x00, 0x00,
0184 };
0185
0186 static const unsigned char *const page_uni2charset[256] = {
0187 page00, page01, page02, NULL, NULL, NULL, NULL, NULL,
0188 };
0189
0190 static const unsigned char charset2lower[256] = {
0191 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0192 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
0193 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0194 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
0195 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
0196 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0197 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
0198 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
0199 0x40, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0200 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
0201 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0202 0x78, 0x79, 0x7a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
0203 0x60, 0x61, 0x62, 0x63, 0x64, 0x65, 0x66, 0x67,
0204 0x68, 0x69, 0x6a, 0x6b, 0x6c, 0x6d, 0x6e, 0x6f,
0205 0x70, 0x71, 0x72, 0x73, 0x74, 0x75, 0x76, 0x77,
0206 0x78, 0x79, 0x7a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
0207
0208 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0209 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
0210 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
0211 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
0212 0xa0, 0xb1, 0xa2, 0xb3, 0xa4, 0xb5, 0xb6, 0xa7,
0213 0xa8, 0xb9, 0xba, 0xbb, 0xbc, 0xad, 0xbe, 0xaf,
0214 0xb0, 0xb1, 0xb2, 0xb3, 0xb4, 0xb5, 0xb6, 0xb7,
0215 0xb8, 0xb9, 0xba, 0xbb, 0xbc, 0xbf, 0xbe, 0xbf,
0216 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
0217 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
0218 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xd7,
0219 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xdf,
0220 0xe0, 0xe1, 0xe2, 0xe3, 0xe4, 0xe5, 0xe6, 0xe7,
0221 0xe8, 0xe9, 0xea, 0xeb, 0xec, 0xed, 0xee, 0xef,
0222 0xf0, 0xf1, 0xf2, 0xf3, 0xf4, 0xf5, 0xf6, 0xf7,
0223 0xf8, 0xf9, 0xfa, 0xfb, 0xfc, 0xfd, 0xfe, 0xff,
0224 };
0225
0226 static const unsigned char charset2upper[256] = {
0227 0x00, 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07,
0228 0x08, 0x09, 0x0a, 0x0b, 0x0c, 0x0d, 0x0e, 0x0f,
0229 0x10, 0x11, 0x12, 0x13, 0x14, 0x15, 0x16, 0x17,
0230 0x18, 0x19, 0x1a, 0x1b, 0x1c, 0x1d, 0x1e, 0x1f,
0231 0x20, 0x21, 0x22, 0x23, 0x24, 0x25, 0x26, 0x27,
0232 0x28, 0x29, 0x2a, 0x2b, 0x2c, 0x2d, 0x2e, 0x2f,
0233 0x30, 0x31, 0x32, 0x33, 0x34, 0x35, 0x36, 0x37,
0234 0x38, 0x39, 0x3a, 0x3b, 0x3c, 0x3d, 0x3e, 0x3f,
0235 0x40, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0236 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
0237 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
0238 0x58, 0x59, 0x5a, 0x5b, 0x5c, 0x5d, 0x5e, 0x5f,
0239 0x60, 0x41, 0x42, 0x43, 0x44, 0x45, 0x46, 0x47,
0240 0x48, 0x49, 0x4a, 0x4b, 0x4c, 0x4d, 0x4e, 0x4f,
0241 0x50, 0x51, 0x52, 0x53, 0x54, 0x55, 0x56, 0x57,
0242 0x58, 0x59, 0x5a, 0x7b, 0x7c, 0x7d, 0x7e, 0x7f,
0243
0244 0x80, 0x81, 0x82, 0x83, 0x84, 0x85, 0x86, 0x87,
0245 0x88, 0x89, 0x8a, 0x8b, 0x8c, 0x8d, 0x8e, 0x8f,
0246 0x90, 0x91, 0x92, 0x93, 0x94, 0x95, 0x96, 0x97,
0247 0x98, 0x99, 0x9a, 0x9b, 0x9c, 0x9d, 0x9e, 0x9f,
0248 0xa0, 0xa1, 0xa2, 0xa3, 0xa4, 0xa5, 0xa6, 0xa7,
0249 0xa8, 0xa9, 0xaa, 0xab, 0xac, 0xad, 0xae, 0xaf,
0250 0xb0, 0xa1, 0xb2, 0xa3, 0xb4, 0xa5, 0xa6, 0xb7,
0251 0xb8, 0xa9, 0xaa, 0xab, 0xac, 0xbd, 0xae, 0xbd,
0252 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
0253 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
0254 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xd7,
0255 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xdf,
0256 0xc0, 0xc1, 0xc2, 0xc3, 0xc4, 0xc5, 0xc6, 0xc7,
0257 0xc8, 0xc9, 0xca, 0xcb, 0xcc, 0xcd, 0xce, 0xcf,
0258 0xd0, 0xd1, 0xd2, 0xd3, 0xd4, 0xd5, 0xd6, 0xf7,
0259 0xd8, 0xd9, 0xda, 0xdb, 0xdc, 0xdd, 0xde, 0xff,
0260 };
0261
0262 static int uni2char(wchar_t uni, unsigned char *out, int boundlen)
0263 {
0264 const unsigned char *uni2charset;
0265 unsigned char cl = uni & 0x00ff;
0266 unsigned char ch = (uni & 0xff00) >> 8;
0267
0268 if (boundlen <= 0)
0269 return -ENAMETOOLONG;
0270
0271 uni2charset = page_uni2charset[ch];
0272 if (uni2charset && uni2charset[cl])
0273 out[0] = uni2charset[cl];
0274 else
0275 return -EINVAL;
0276 return 1;
0277 }
0278
0279 static int char2uni(const unsigned char *rawstring, int boundlen, wchar_t *uni)
0280 {
0281 *uni = charset2uni[*rawstring];
0282 if (*uni == 0x0000)
0283 return -EINVAL;
0284 return 1;
0285 }
0286
0287 static struct nls_table table = {
0288 .charset = "iso8859-4",
0289 .uni2char = uni2char,
0290 .char2uni = char2uni,
0291 .charset2lower = charset2lower,
0292 .charset2upper = charset2upper,
0293 };
0294
0295 static int __init init_nls_iso8859_4(void)
0296 {
0297 return register_nls(&table);
0298 }
0299
0300 static void __exit exit_nls_iso8859_4(void)
0301 {
0302 unregister_nls(&table);
0303 }
0304
0305 module_init(init_nls_iso8859_4)
0306 module_exit(exit_nls_iso8859_4)
0307
0308 MODULE_LICENSE("Dual BSD/GPL");