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2026PKUCourseHW5: Fix matrix file opening in Genelpa #355

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2026PKUCourseHW5: Fix matrix file opening in Genelpa #355

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8 changes: 8 additions & 0 deletions source/source_hsolver/module_genelpa/utils.cpp
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Original file line number Diff line number Diff line change
Expand Up @@ -92,7 +92,15 @@ void loadMatrix(const char FileName[], int nFull, double* a, int* desca, int bla
const int ROOT_PROC = 0;
std::ifstream matrixFile;
if (myid == ROOT_PROC)
{
matrixFile.open(FileName);
if (!matrixFile.is_open())
{
std::cerr << "Error: failed to open matrix file '" << FileName
<< "' in loadMatrix()." << std::endl;
MPI_Abort(MPI_COMM_WORLD, 1);
}
}

double* b; // buffer
const int MAX_BUFFER_SIZE = 1e9; // max buffer size is 1GB
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