Greetings,
my program exits with the
code 3. No
error messages, no exceptions, and the exit is not initiated by my
code.
The problem occurs when I am trying to read extremely long integer values from a text file (the text file is present and correctly opened, with successful prior reading).
I am using very large amounts of memory (in fact, I think that this might be the cause, as I am nearly sure I go over the 2GB per process memory limit). I am also using the GMP (or, rather, MPIR) library to multiply bignums. I am fairly sure that this is not a file I/O problem as I got the same
error code on a previous program version that was fully in-memory.
System:
MS Visual Studio 2008
MS Windows Vista Home Premium x86
MPIR 2.1.0 rc2
4GB RAM
Where might this
error code originate from?
EDIT: this is the procedure that exits with the
code
void condenseBinSplitFile(const char *sourceFilename, int partCount){
//condense results file into final P and Q
std::string tempFilename;
std::string inputFilename(sourceFilename);
std::string outputFilename(BIN_SPLIT_FILENAME_DATA2);
mpz_class *P = new mpz_class(0);
mpz_class *Q = new mpz_class(0);
mpz_class *PP = new mpz_class(0);
mpz_class *QQ = new mpz_class(0);
FILE *sourceFile;
FILE *resultFile;
fpos_t oldPos;
int swapCount = 0;
while (partCount > 1){
std::cout << partCount << std::endl;
sourceFile = fopen(inputFilename.c_str(), "r");
resultFile = fopen(outputFilename.c_str(), "w");
for (int i=0; i<partCount/2; i++){
//Multiplication order:
//Get Q, skip P
//Get QQ, mul Q and QQ, print Q, delete Q
//Jump back to P, get P
//Mul P and QQ, delete QQ
//Skip QQ, get PP
//Mul P and PP, delete P and PP
//Get Q, skip P
mpz_inp_str(Q->get_mpz_t(), sourceFile, CALC_BASE);
fgetpos(sourceFile, &oldPos);
skipLine(sourceFile);
skipLine(sourceFile);
//Get QQ, mul Q and QQ, print Q, delete Q
mpz_inp_str(QQ->get_mpz_t(), sourceFile, CALC_BASE);
(*Q) *= (*QQ);
mpz_out_str(resultFile, CALC_BASE, Q->get_mpz_t());
fputc('\n', resultFile);
(*Q) = 0;
//Jump back to P, get P
fsetpos(sourceFile, &oldPos);
mpz_inp_str(P->get_mpz_t(), sourceFile, CALC_BASE);
//Mul P and QQ, delete QQ
(*P) *= (*QQ);
(*QQ) = 0;
//Skip QQ, get PP
skipLine(sourceFile);
skipLine(sourceFile);
mpz_inp_str(PP->get_mpz_t(), sourceFile, CALC_BASE);
//Mul P and PP, delete PP, print P, delete P
(*P) += (*PP);
(*PP) = 0;
mpz_out_str(resultFile, CALC_BASE, P->get_mpz_t());
fputc('\n', resultFile);
(*P) = 0;
}
partCount /= 2;
fclose(sourceFile);
fclose(resultFile);
//swap filenames
tempFilename = inputFilename;
inputFilename = outputFilename;
outputFilename = tempFilename;
swapCount++;
}
delete P;
delete Q;
delete PP;
delete QQ;
remove(BIN_SPLIT_FILENAME_RESULTS);
if (swapCount%2 == 0)
rename(sourceFilename, BIN_SPLIT_FILENAME_RESULTS);
else
rename(BIN_SPLIT_FILENAME_DATA2, BIN_SPLIT_FILENAME_RESULTS);
}
