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Shift VCD timeline

pyohayo

Hello,

I wonder if there is a cadence tool that allows you to shift the time values in a VCD file, for example translate the range 700us ... 1000us to the range 0 ... 300us.

Thanks.

Parents

  • Well ... I've developed a small program: probably will be useful for someone (filenane vcd_timeline_shifter.cpp):

    #include <fstream>
    #include <string>
    #include <sstream>

    using namespace std;

    int main(int argc, char *argv[]) {
    string input_file;
    string output_file;
    long int time_shift;

    if(argc < 3)
    {
    printf("\n\nPrograme usage: vcd_timeline_shifter {name_of_vcd_file} {shift time in fs}\n\n\n");
    return 0;
    } else {
    input_file = argv[1];
    output_file = input_file.substr(0, input_file.find('.')) + "_shifted.vcd";
    time_shift = atol(argv[2]);
    }

    string input_line;
    ifstream fin(input_file);
    ofstream fout(output_file);

    if(fin.is_open() && fout.is_open())
    {
    while(getline(fin, input_line))
    {
    if(input_line[0] == '#')
    {
    stringstream ss;
    ss << '#' << stol(input_line.substr(1))- time_shift;
    input_line = ss.str();
    }
    fout << input_line << endl;
    }
    fin.close();
    fout.close();
    } else {
    printf("Cannot open file %s\n", argv[1]);
    return 0;
    }
    }

    Compilation:

    g++   -std=c++11 vcd_timeline_shifter.cpp -o vcd_timeline_shifter  

     Usage: 

    ./vcd_timeline_shifter {name_of_vcd_file} {time_shift_in_fs}

    it generates file with prefix _shifted.

Reply

  • Well ... I've developed a small program: probably will be useful for someone (filenane vcd_timeline_shifter.cpp):

    #include <fstream>
    #include <string>
    #include <sstream>

    using namespace std;

    int main(int argc, char *argv[]) {
    string input_file;
    string output_file;
    long int time_shift;

    if(argc < 3)
    {
    printf("\n\nPrograme usage: vcd_timeline_shifter {name_of_vcd_file} {shift time in fs}\n\n\n");
    return 0;
    } else {
    input_file = argv[1];
    output_file = input_file.substr(0, input_file.find('.')) + "_shifted.vcd";
    time_shift = atol(argv[2]);
    }

    string input_line;
    ifstream fin(input_file);
    ofstream fout(output_file);

    if(fin.is_open() && fout.is_open())
    {
    while(getline(fin, input_line))
    {
    if(input_line[0] == '#')
    {
    stringstream ss;
    ss << '#' << stol(input_line.substr(1))- time_shift;
    input_line = ss.str();
    }
    fout << input_line << endl;
    }
    fin.close();
    fout.close();
    } else {
    printf("Cannot open file %s\n", argv[1]);
    return 0;
    }
    }

    Compilation:

    g++   -std=c++11 vcd_timeline_shifter.cpp -o vcd_timeline_shifter  

     Usage: 

    ./vcd_timeline_shifter {name_of_vcd_file} {time_shift_in_fs}

    it generates file with prefix _shifted.

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