| 304 | |
| 305 | |
| 306 | static bool encodeUtf8Char(uint32_t ch, char * result) { |
| 307 | |
| 308 | if (ch <= 0x7F) { |
| 309 | result[0] = char(ch); |
| 310 | result[1] = 0; |
| 311 | return true; |
| 312 | } |
| 313 | |
| 314 | if (ch <= 0x7FF) { |
| 315 | result[0] = char((ch >> 6) | 0xC0); |
| 316 | result[1] = char((ch & 0x3F) | 0x80); |
| 317 | result[2] = 0; |
| 318 | return true; |
| 319 | } |
| 320 | |
| 321 | if (ch <= 0xFFFF) { |
| 322 | result[0] = char((ch >> 12) | 0xE0); |
| 323 | result[1] = char(((ch >> 6) & 0x3F) | 0x80); |
| 324 | result[2] = char(((ch >> 0) & 0x3F) | 0x80); |
| 325 | result[3] = 0; |
| 326 | return true; |
| 327 | } |
| 328 | |
| 329 | if (ch <= 0x1FFFFF) { |
| 330 | result[0] = char((ch >> 18) | 0xF0); |
| 331 | result[1] = char(((ch >> 12) & 0x3F) | 0x80); |
| 332 | result[2] = char(((ch >> 6) & 0x3F) | 0x80); |
| 333 | result[3] = char(((ch >> 0) & 0x3F) | 0x80); |
| 334 | result[4] = 0; |
| 335 | return true; |
| 336 | } |
| 337 | |
| 338 | if (ch <= 0x3FFFFFF) { |
| 339 | result[0] = char((ch >> 24) | 0xF8); |
| 340 | result[1] = char(((ch >> 18) & 0x3F) | 0x80); |
| 341 | result[2] = char(((ch >> 12) & 0x3F) | 0x80); |
| 342 | result[3] = char(((ch >> 6) & 0x3F) | 0x80); |
| 343 | result[4] = char(((ch >> 0) & 0x3F) | 0x80); |
| 344 | result[5] = 0; |
| 345 | return true; |
| 346 | } |
| 347 | |
| 348 | if (ch <= 0x7FFFFFFF) { |
| 349 | result[0] = char((ch >> 30) | 0xFC); |
| 350 | result[1] = char(((ch >> 24) & 0x3F) | 0x80); |
| 351 | result[2] = char(((ch >> 18) & 0x3F) | 0x80); |
| 352 | result[3] = char(((ch >> 12) & 0x3F) | 0x80); |
| 353 | result[4] = char(((ch >> 6) & 0x3F) | 0x80); |
| 354 | result[5] = char(((ch >> 0) & 0x3F) | 0x80); |
| 355 | result[6] = 0; |
| 356 | return true; |
| 357 | } |
| 358 | |
| 359 | result[0] = '?'; |
| 360 | result[1] = 0; |
| 361 | |
| 362 | return false; |
| 363 | } |