1 #include <wchar.h> 2 #include <wctype.h> 3 #include <stdio.h> 4 5 #define CASEMAP(u1,u2,l) { (u1), (l)-(u1), (u2)-(u1)+1 } 6 #define CASELACE(u1,u2) CASEMAP((u1),(u2),(u1)+1) 7 8 static const struct { 9 unsigned short upper; 10 signed char lower; 11 unsigned char len; 12 } casemaps[] = { 13 CASEMAP('A','Z','a'), 14 CASEMAP(0xc0,0xde,0xe0), 15 16 CASELACE(0x0100,0x012e), 17 CASELACE(0x0132,0x0136), 18 CASELACE(0x0139,0x0147), 19 CASELACE(0x014a,0x0176), 20 CASELACE(0x0179,0x017d), 21 22 CASELACE(0x370,0x372), 23 CASEMAP(0x391,0x3a1,0x3b1), 24 CASEMAP(0x3a3,0x3ab,0x3c3), 25 CASEMAP(0x400,0x40f,0x450), 26 CASEMAP(0x410,0x42f,0x430), 27 28 CASELACE(0x460,0x480), 29 CASELACE(0x48a,0x4be), 30 CASELACE(0x4c1,0x4cd), 31 CASELACE(0x4d0,0x50e), 32 33 CASELACE(0x514,0x526), 34 CASEMAP(0x531,0x556,0x561), 35 36 CASELACE(0x01a0,0x01a4), 37 CASELACE(0x01b3,0x01b5), 38 CASELACE(0x01cd,0x01db), 39 CASELACE(0x01de,0x01ee), 40 CASELACE(0x01f8,0x021e), 41 CASELACE(0x0222,0x0232), 42 CASELACE(0x03d8,0x03ee), 43 44 CASELACE(0x1e00,0x1e94), 45 CASELACE(0x1ea0,0x1efe), 46 47 CASEMAP(0x1f08,0x1f0f,0x1f00), 48 CASEMAP(0x1f18,0x1f1d,0x1f10), 49 CASEMAP(0x1f28,0x1f2f,0x1f20), 50 CASEMAP(0x1f38,0x1f3f,0x1f30), 51 CASEMAP(0x1f48,0x1f4d,0x1f40), 52 53 CASEMAP(0x1f68,0x1f6f,0x1f60), 54 CASEMAP(0x1f88,0x1f8f,0x1f80), 55 CASEMAP(0x1f98,0x1f9f,0x1f90), 56 CASEMAP(0x1fa8,0x1faf,0x1fa0), 57 CASEMAP(0x1fb8,0x1fb9,0x1fb0), 58 CASEMAP(0x1fba,0x1fbb,0x1f70), 59 CASEMAP(0x1fc8,0x1fcb,0x1f72), 60 CASEMAP(0x1fd8,0x1fd9,0x1fd0), 61 CASEMAP(0x1fda,0x1fdb,0x1f76), 62 CASEMAP(0x1fe8,0x1fe9,0x1fe0), 63 CASEMAP(0x1fea,0x1feb,0x1f7a), 64 CASEMAP(0x1ff8,0x1ff9,0x1f78), 65 CASEMAP(0x1ffa,0x1ffb,0x1f7c), 66 67 CASELACE(0x246,0x24e), 68 CASELACE(0x510,0x512), 69 CASEMAP(0x2160,0x216f,0x2170), 70 CASEMAP(0x2c00,0x2c2e,0x2c30), 71 CASELACE(0x2c67,0x2c6b), 72 CASELACE(0x2c80,0x2ce2), 73 CASELACE(0x2ceb,0x2ced), 74 75 CASELACE(0xa640,0xa66c), 76 CASELACE(0xa680,0xa696), 77 78 CASELACE(0xa722,0xa72e), 79 CASELACE(0xa732,0xa76e), 80 CASELACE(0xa779,0xa77b), 81 CASELACE(0xa77e,0xa786), 82 83 CASELACE(0xa790,0xa792), 84 CASELACE(0xa7a0,0xa7a8), 85 86 CASEMAP(0xff21,0xff3a,0xff41), 87 { 0,0,0 } 88 }; 89 90 static const unsigned short pairs[][2] = { 91 { 'I', 0x0131 }, 92 { 'S', 0x017f }, 93 { 0x0130, 'i' }, 94 { 0x0178, 0x00ff }, 95 { 0x0181, 0x0253 }, 96 { 0x0182, 0x0183 }, 97 { 0x0184, 0x0185 }, 98 { 0x0186, 0x0254 }, 99 { 0x0187, 0x0188 }, 100 { 0x0189, 0x0256 }, 101 { 0x018a, 0x0257 }, 102 { 0x018b, 0x018c }, 103 { 0x018e, 0x01dd }, 104 { 0x018f, 0x0259 }, 105 { 0x0190, 0x025b }, 106 { 0x0191, 0x0192 }, 107 { 0x0193, 0x0260 }, 108 { 0x0194, 0x0263 }, 109 { 0x0196, 0x0269 }, 110 { 0x0197, 0x0268 }, 111 { 0x0198, 0x0199 }, 112 { 0x019c, 0x026f }, 113 { 0x019d, 0x0272 }, 114 { 0x019f, 0x0275 }, 115 { 0x01a6, 0x0280 }, 116 { 0x01a7, 0x01a8 }, 117 { 0x01a9, 0x0283 }, 118 { 0x01ac, 0x01ad }, 119 { 0x01ae, 0x0288 }, 120 { 0x01af, 0x01b0 }, 121 { 0x01b1, 0x028a }, 122 { 0x01b2, 0x028b }, 123 { 0x01b7, 0x0292 }, 124 { 0x01b8, 0x01b9 }, 125 { 0x01bc, 0x01bd }, 126 { 0x01c4, 0x01c6 }, 127 { 0x01c4, 0x01c5 }, 128 { 0x01c5, 0x01c6 }, 129 { 0x01c7, 0x01c9 }, 130 { 0x01c7, 0x01c8 }, 131 { 0x01c8, 0x01c9 }, 132 { 0x01ca, 0x01cc }, 133 { 0x01ca, 0x01cb }, 134 { 0x01cb, 0x01cc }, 135 { 0x01f1, 0x01f3 }, 136 { 0x01f1, 0x01f2 }, 137 { 0x01f2, 0x01f3 }, 138 { 0x01f4, 0x01f5 }, 139 { 0x01f6, 0x0195 }, 140 { 0x01f7, 0x01bf }, 141 { 0x0220, 0x019e }, 142 { 0x0386, 0x03ac }, 143 { 0x0388, 0x03ad }, 144 { 0x0389, 0x03ae }, 145 { 0x038a, 0x03af }, 146 { 0x038c, 0x03cc }, 147 { 0x038e, 0x03cd }, 148 { 0x038f, 0x03ce }, 149 { 0x0399, 0x0345 }, 150 { 0x0399, 0x1fbe }, 151 { 0x03a3, 0x03c2 }, 152 { 0x03f7, 0x03f8 }, 153 { 0x03fa, 0x03fb }, 154 { 0x1e60, 0x1e9b }, 155 { 0xdf, 0xdf }, 156 { 0x1e9e, 0xdf }, 157 158 { 0x1f59, 0x1f51 }, 159 { 0x1f5b, 0x1f53 }, 160 { 0x1f5d, 0x1f55 }, 161 { 0x1f5f, 0x1f57 }, 162 { 0x1fbc, 0x1fb3 }, 163 { 0x1fcc, 0x1fc3 }, 164 { 0x1fec, 0x1fe5 }, 165 { 0x1ffc, 0x1ff3 }, 166 167 { 0x23a, 0x2c65 }, 168 { 0x23b, 0x23c }, 169 { 0x23d, 0x19a }, 170 { 0x23e, 0x2c66 }, 171 { 0x241, 0x242 }, 172 { 0x243, 0x180 }, 173 { 0x244, 0x289 }, 174 { 0x245, 0x28c }, 175 { 0x3f4, 0x3b8 }, 176 { 0x3f9, 0x3f2 }, 177 { 0x3fd, 0x37b }, 178 { 0x3fe, 0x37c }, 179 { 0x3ff, 0x37d }, 180 { 0x4c0, 0x4cf }, 181 182 { 0x2126, 0x3c9 }, 183 { 0x212a, 'k' }, 184 { 0x212b, 0xe5 }, 185 { 0x2132, 0x214e }, 186 { 0x2183, 0x2184 }, 187 { 0x2c60, 0x2c61 }, 188 { 0x2c62, 0x26b }, 189 { 0x2c63, 0x1d7d }, 190 { 0x2c64, 0x27d }, 191 { 0x2c6d, 0x251 }, 192 { 0x2c6e, 0x271 }, 193 { 0x2c6f, 0x250 }, 194 { 0x2c70, 0x252 }, 195 { 0x2c72, 0x2c73 }, 196 { 0x2c75, 0x2c76 }, 197 { 0x2c7e, 0x23f }, 198 { 0x2c7f, 0x240 }, 199 { 0x2cf2, 0x2cf3 }, 200 201 { 0xa77d, 0x1d79 }, 202 { 0xa78b, 0xa78c }, 203 { 0xa78d, 0x265 }, 204 { 0xa7aa, 0x266 }, 205 206 { 0x10c7, 0x2d27 }, 207 { 0x10cd, 0x2d2d }, 208 209 /* bogus greek 'symbol' letters */ 210 { 0x376, 0x377 }, 211 { 0x39c, 0xb5 }, 212 { 0x392, 0x3d0 }, 213 { 0x398, 0x3d1 }, 214 { 0x3a6, 0x3d5 }, 215 { 0x3a0, 0x3d6 }, 216 { 0x39a, 0x3f0 }, 217 { 0x3a1, 0x3f1 }, 218 { 0x395, 0x3f5 }, 219 { 0x3cf, 0x3d7 }, 220 221 { 0,0 } 222 }; 223 224 225 static wchar_t __towcase(wchar_t wc, int lower) 226 { 227 int i; 228 int lmul = 2*lower-1; 229 int lmask = lower-1; 230 /* no letters with case in these large ranges */ 231 if (!iswalpha(wc) 232 || (unsigned)wc - 0x0600 <= 0x0fff-0x0600 233 || (unsigned)wc - 0x2e00 <= 0xa63f-0x2e00 234 || (unsigned)wc - 0xa800 <= 0xfeff-0xa800) 235 return wc; 236 /* special case because the diff between upper/lower is too big */ 237 if (lower && (unsigned)wc - 0x10a0 < 0x2e) 238 if (wc>0x10c5 && wc != 0x10c7 && wc != 0x10cd) return wc; 239 else return wc + 0x2d00 - 0x10a0; 240 if (!lower && (unsigned)wc - 0x2d00 < 0x26) 241 if (wc>0x2d25 && wc != 0x2d27 && wc != 0x2d2d) return wc; 242 else return wc + 0x10a0 - 0x2d00; 243 for (i=0; casemaps[i].len; i++) { 244 int base = casemaps[i].upper + (lmask & casemaps[i].lower); 245 if ((unsigned)wc-base < casemaps[i].len) { 246 if (casemaps[i].lower == 1) 247 return wc + lower - ((wc-casemaps[i].upper)&1); 248 return wc + lmul*casemaps[i].lower; 249 } 250 } 251 for (i=0; pairs[i][1-lower]; i++) { 252 if (pairs[i][1-lower] == wc) 253 return pairs[i][lower]; 254 } 255 if ((unsigned)wc - (0x10428 - 0x28*lower) < 0x28) 256 return wc - 0x28 + 0x50*lower; 257 return wc; 258 } 259 260 wint_t towupper(wint_t wc) 261 { 262 return __towcase(wc, 0); 263 } 264 265 wint_t towlower(wint_t wc) 266 { 267 return __towcase(wc, 1); 268 } 269
