return "Child input from output parent unit";
case IostatChildOutputToInputParent:
return "Child output to input parent unit";
+ case IostatShortRead:
+ return "Read from external unit returned insufficient data";
+ case IostatMissingTerminator:
+ return "Sequential record missing its terminator";
+ case IostatBadUnformattedRecord:
+ return "Erroneous unformatted sequential file record structure";
default:
return nullptr;
}
// checked informatively in NextSequentialVariableUnformattedInputRecord().
std::size_t got{
ReadFrame(frameOffsetInFile_ - headerBytes, headerBytes, handler)};
- RUNTIME_CHECK(handler, got >= sizeof footer);
+ if (static_cast<std::int64_t>(got) < headerBytes) {
+ handler.SignalError(IostatShortRead);
+ return;
+ }
std::memcpy(&footer, Frame(), sizeof footer);
recordLength = footer;
- RUNTIME_CHECK(handler, frameOffsetInFile_ >= *recordLength + 2 * headerBytes);
+ if (frameOffsetInFile_ < *recordLength + 2 * headerBytes) {
+ handler.SignalError(IostatBadUnformattedRecord);
+ return;
+ }
frameOffsetInFile_ -= *recordLength + 2 * headerBytes;
if (frameOffsetInFile_ >= headerBytes) {
frameOffsetInFile_ -= headerBytes;
auto need{static_cast<std::size_t>(
recordOffsetInFrame_ + sizeof header + *recordLength)};
got = ReadFrame(frameOffsetInFile_, need, handler);
- RUNTIME_CHECK(handler, got >= need);
+ if (got < need) {
+ handler.SignalError(IostatShortRead);
+ return;
+ }
std::memcpy(&header, Frame() + recordOffsetInFrame_, sizeof header);
- RUNTIME_CHECK(handler, header == *recordLength);
+ if (header != *recordLength) {
+ handler.SignalError(IostatBadUnformattedRecord);
+ return;
+ }
}
// There's no portable memrchr(), unfortunately, and strrchr() would
frameOffsetInFile_ -= std::min<std::int64_t>(frameOffsetInFile_, 1024);
auto need{static_cast<std::size_t>(prevNL + 1 - frameOffsetInFile_)};
auto got{ReadFrame(frameOffsetInFile_, need, handler)};
- RUNTIME_CHECK(handler, got >= need);
+ if (got < need) {
+ handler.SignalError(IostatShortRead);
+ return;
+ }
+ }
+ if (Frame()[recordOffsetInFrame_ + *recordLength] != '\n') {
+ handler.SignalError(IostatMissingTerminator);
+ return;
}
- RUNTIME_CHECK(handler, Frame()[recordOffsetInFrame_ + *recordLength] == '\n');
if (*recordLength > 0 &&
Frame()[recordOffsetInFrame_ + *recordLength - 1] == '\r') {
--*recordLength;