| 594 | */ |
| 595 | |
| 596 | const char *CPLReadLine(FILE *fp) |
| 597 | |
| 598 | { |
| 599 | /* -------------------------------------------------------------------- */ |
| 600 | /* Cleanup case. */ |
| 601 | /* -------------------------------------------------------------------- */ |
| 602 | if (fp == nullptr) |
| 603 | { |
| 604 | CPLReadLineBuffer(-1); |
| 605 | return nullptr; |
| 606 | } |
| 607 | |
| 608 | /* -------------------------------------------------------------------- */ |
| 609 | /* Loop reading chunks of the line till we get to the end of */ |
| 610 | /* the line. */ |
| 611 | /* -------------------------------------------------------------------- */ |
| 612 | size_t nBytesReadThisTime = 0; |
| 613 | char *pszRLBuffer = nullptr; |
| 614 | size_t nReadSoFar = 0; |
| 615 | |
| 616 | do |
| 617 | { |
| 618 | /* -------------------------------------------------------------------- |
| 619 | */ |
| 620 | /* Grow the working buffer if we have it nearly full. Fail out */ |
| 621 | /* of read line if we can't reallocate it big enough (for */ |
| 622 | /* instance for a _very large_ file with no newlines). */ |
| 623 | /* -------------------------------------------------------------------- |
| 624 | */ |
| 625 | if (nReadSoFar > 100 * 1024 * 1024) |
| 626 | // It is dubious that we need to read a line longer than 100 MB. |
| 627 | return nullptr; |
| 628 | pszRLBuffer = CPLReadLineBuffer(static_cast<int>(nReadSoFar) + 129); |
| 629 | if (pszRLBuffer == nullptr) |
| 630 | return nullptr; |
| 631 | |
| 632 | /* -------------------------------------------------------------------- |
| 633 | */ |
| 634 | /* Do the actual read. */ |
| 635 | /* -------------------------------------------------------------------- |
| 636 | */ |
| 637 | if (CPLFGets(pszRLBuffer + nReadSoFar, 128, fp) == nullptr && |
| 638 | nReadSoFar == 0) |
| 639 | return nullptr; |
| 640 | |
| 641 | nBytesReadThisTime = strlen(pszRLBuffer + nReadSoFar); |
| 642 | nReadSoFar += nBytesReadThisTime; |
| 643 | } while (nBytesReadThisTime >= 127 && pszRLBuffer[nReadSoFar - 1] != knCR && |
| 644 | pszRLBuffer[nReadSoFar - 1] != knLF); |
| 645 | |
| 646 | return pszRLBuffer; |
| 647 | } |
| 648 | |
| 649 | /************************************************************************/ |
| 650 | /* CPLReadLineL() */ |
no test coverage detected