| 374 | }; |
| 375 | |
| 376 | static Error interpretDecimal(StringRef::iterator begin, |
| 377 | StringRef::iterator end, decimalInfo *D) { |
| 378 | StringRef::iterator dot = end; |
| 379 | |
| 380 | auto PtrOrErr = skipLeadingZeroesAndAnyDot(begin, end, &dot); |
| 381 | if (!PtrOrErr) |
| 382 | return PtrOrErr.takeError(); |
| 383 | StringRef::iterator p = *PtrOrErr; |
| 384 | |
| 385 | D->firstSigDigit = p; |
| 386 | D->exponent = 0; |
| 387 | D->normalizedExponent = 0; |
| 388 | |
| 389 | for (; p != end; ++p) { |
| 390 | if (*p == '.') { |
| 391 | if (dot != end) |
| 392 | return createError("String contains multiple dots"); |
| 393 | dot = p++; |
| 394 | if (p == end) |
| 395 | break; |
| 396 | } |
| 397 | if (decDigitValue(*p) >= 10U) |
| 398 | break; |
| 399 | } |
| 400 | |
| 401 | if (p != end) { |
| 402 | if (*p != 'e' && *p != 'E') |
| 403 | return createError("Invalid character in significand"); |
| 404 | if (p == begin) |
| 405 | return createError("Significand has no digits"); |
| 406 | if (dot != end && p - begin == 1) |
| 407 | return createError("Significand has no digits"); |
| 408 | |
| 409 | /* p points to the first non-digit in the string */ |
| 410 | auto ExpOrErr = readExponent(p + 1, end); |
| 411 | if (!ExpOrErr) |
| 412 | return ExpOrErr.takeError(); |
| 413 | D->exponent = *ExpOrErr; |
| 414 | |
| 415 | /* Implied decimal point? */ |
| 416 | if (dot == end) |
| 417 | dot = p; |
| 418 | } |
| 419 | |
| 420 | /* If number is all zeroes accept any exponent. */ |
| 421 | if (p != D->firstSigDigit) { |
| 422 | /* Drop insignificant trailing zeroes. */ |
| 423 | if (p != begin) { |
| 424 | do |
| 425 | do |
| 426 | p--; |
| 427 | while (p != begin && *p == '0'); |
| 428 | while (p != begin && *p == '.'); |
| 429 | } |
| 430 | |
| 431 | /* Adjust the exponents for any decimal point. */ |
| 432 | D->exponent += static_cast<APFloat::ExponentType>((dot - p) - (dot > p)); |
| 433 | D->normalizedExponent = (D->exponent + |
no test coverage detected