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Views: 681 | Replies: 2 | Solved
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Join Date: Mar 2007
Posts: 3
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C++ File Generator

  #1  
Mar 29th, 2007
Hey all, I'm new to this forum, first post.. so please excuse me (also excuse the perhaps not so eloquent style, it is still in preliminary!) =). I'm writing a short piece of code in compliance with a webserver I've been programming with a group. This code is to auto generate an assorted sizes of files (which will later be used to test latency timings and average GET request timings) starting from size Class 0 which are files less
than 1KB, class 1 files are less than 10K, class 2 files are less than 100K and class 3 files
are less than 1MB. It should auto-populates the specified directory with the four
classes of files. There will be 9 files per class. Files in class 0 are in increments of
0.1KB (starting at 102 bytes) while class 1, class 2 and class 3 are in increments of 1KB. Syntax to use the code is HTMLGenerator -d <directory>. Output files should have the form of class<classsize#>_<increment>.

My greatest problem is that our school's compiler is old and does not contain <sstream> hence making my INT to String conversion difficult. Currently the code seg faults, likely due to improper usage of the *buffer. Any questions regarding the code I will promptly reply as I'm still working away. Any suggestions on how I can get this done? Thank you all greatly for your time and help ! =)

Help with Code Tags
c++ Syntax (Toggle Plain Text) 
  1. #include <string>
  2. #include <cstring>
  3. #include <iostream>
  4. #include <fstream>
  5. #include <stdio.h>
  6. #include <stdlib.h>
  7. #include <string>
  8.  
  9.  
  10. using namespace std;
  11.  
  12. int main(int argcount, char* args[]){
  13.     int number_of_arguments = argcount-1;
  14.  
  15.     for (int i=1;i<=number_of_arguments;i++){
  16.     string argTemp = args[i];
  17.  
  18.        if (argTemp == "-d"){
  19.            //begin loop
  20.            string classSize,increm;
  21.            for (int i=0;i<1;i++){
  22.                if (i==0){classSize="102";increm="100";}
  23.                if (i==1){classSize="1024";increm="1000";}
  24.                if (i==2){classSize="10240";increm="10000";}
  25.                if (i==3){classSize="102400";increm="100000";}
  26.  
  27.  
  28.          int incremTEMP=atoi(increm.c_str());
  29.          int classSizeTEMP=atoi(classSize.c_str());
  30.          for (int j=0;j<9;j++){
  31.                    string dest=args[2];
  32.                    dest=dest+"/class"+classSize+"_"+increm;              
  33.                    ofstream myfile (dest.c_str());
  34.                    if (!myfile.is_open()) { //check validity of file
  35.                       cerr << "Error: cannot open the file " << dest << endl;
  36.                       exit (-1);
  37.                    }else{
  38.                       for (int k=0;k<(classSizeTEMP+incremTEMP)/2;k++){
  39.                           myfile<<"LO";
  40.                       }
  41.                    }
  42.               myfile.close();
  43.               incremTEMP=incremTEMP+j*incremTEMP; 
  44.  
  45. //problems here (i'm really not sure i'm using
  46. //sprintf correctly at all, let alone storing the
  47. // data in buffer back into increm
  48.               char *buffer[100]; 
  49.               sprintf(buffer[100], "%d",incremTEMP);
  50.               for (int i=1;i<=100;i++) increm+=buffer[i];
  51.               delete *buffer; 
  52.                }
  53.            }
  54.     }
  55.     }
  56. }
  57.  
Last edited by Eyies : Mar 29th, 2007 at 11:11 pm.
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Re: C++ File Generator

  #2  
Mar 29th, 2007
Hi all, I have managed to find a IntToString algorithm and I THINK its working, however the files are not generating. Sigh. If you could look over my code that would be great!

Help with Code Tags

C++ Syntax (Toggle Plain Text) 
  1. #include <string>
  2. #include <cstring>
  3. #include <iostream>
  4. #include <fstream>
  5. #include <stdio.h>
  6. #include <stdlib.h>
  7. #include <string>
  8.  
  9.  
  10. using namespace std;
  11.  
  12. string IntToString(unsigned int x)
  13. {
  14.     static const int Radix = 10;
  15.     static const int MaxDigits = 20;
  16.  
  17.     if (0 == x) return "0";
  18.  
  19.     char Tmp[MaxDigits + 1];
  20.     char* Cur = Tmp + MaxDigits;
  21.     *Cur = '\0';
  22.     while (x && (Cur > Tmp))
  23.     {
  24.         --Cur;
  25.         *Cur = (x%Radix) + '0';
  26.         x /= Radix;
  27.     }
  28. return Cur;
  29. }
  30.  
  31. int main(int argcount, char* args[]){
  32.     int number_of_arguments = argcount-1;
  33.  
  34.     for (int i=1;i<=number_of_arguments;i++){
  35.     string argTemp = args[i];
  36.  
  37.        if (argTemp == "-d"){
  38.          cout<<"sup"<<endl;
  39.            //begin loop
  40.            string classSize,increm;
  41.            for (int i=0;i<3;i++){
  42.             cout<<i<<endl;
  43.                if (i==0){
  44.             classSize="102";increm="100";}
  45.                if (i==1){classSize="1024";increm="1000";}
  46.                if (i==2){classSize="10240";increm="10000";}
  47.                if (i==3){classSize="102400";increm="100000";}
  48.  
  49.  
  50.          int incremTEMP=atoi(increm.c_str());
  51.            int classSizeTEMP=atoi(classSize.c_str());
  52.          for (int j=0;j<9;j++){
  53.                    string dest=args[2];
  54.                    dest=dest+"/class"+classSize+"_"+increm;              
  55.                    ofstream myfile (dest.c_str());
  56.             cout<<dest<<endl;
  57.             cout<<increm<<endl;
  58.                    if (!myfile.is_open()) { //check validity of file
  59.                       cerr << "Error: cannot open the file " << dest << endl;
  60.                       exit (-1);
  61.                    }else{
  62.                       for (int k=0;k<(classSizeTEMP+incremTEMP)/2;k++){
  63.                           myfile<<"LO";
  64.                       }
  65.                    }
  66.               myfile.close();
  67.                     incremTEMP=incremTEMP+(j+1)*incremTEMP;
  68.               increm=IntToString(incremTEMP);
  69.                }
  70.            }
  71.     }
  72.     }
  73. }
Last edited by Eyies : Mar 30th, 2007 at 12:03 am.
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Re: C++ File Generator

  #3  
Mar 30th, 2007
lol never mind. I figured it all out, now to implement different flags, sorry for the spam guys. =)
Help with Code Tags
c++ Syntax (Toggle Plain Text) 
  1. #include <string>
  2. #include <cstring>
  3. #include <iostream>
  4. #include <fstream>
  5. #include <stdio.h>
  6. #include <stdlib.h>
  7. #include <string>
  8.  
  9.  
  10. using namespace std;
  11.  
  12. string IntToString(unsigned int x)
  13. {
  14.     static const int Radix = 10;
  15.     static const int MaxDigits = 20;
  16.  
  17.     if (0 == x) return "0";
  18.  
  19.     char Tmp[MaxDigits + 1];
  20.     char* Cur = Tmp + MaxDigits;
  21.     *Cur = '\0';
  22.     while (x && (Cur > Tmp))
  23.     {
  24.         --Cur;
  25.         *Cur = (x%Radix) + '0';
  26.         x /= Radix;
  27.     }
  28. return Cur;
  29. }
  30.  
  31. int main(int argcount, char* args[]){
  32.     int number_of_arguments = argcount-1;
  33.  
  34.     for (int i=1;i<=number_of_arguments;i++){
  35.     string argTemp = args[i];
  36.  
  37.        if (argTemp == "-d"){
  38.          cout<<"sup"<<endl;
  39.            //begin loop
  40.            string classSize,increm;
  41.            for (int i=0;i<3;i++){
  42.             cout<<i<<endl;
  43.                if (i==0){classSize="102";increm="100";}
  44.                if (i==1){classSize="1024";increm="1000";}
  45.                if (i==2){classSize="10240";increm="10000";}
  46.                if (i==3){classSize="102400";increm="100000";}
  47.  
  48.  
  49.          int incremTEMP=atoi(increm.c_str());
  50.            int classSizeTEMP=atoi(classSize.c_str());
  51.          for (int j=0;j<9;j++){
  52.                    string dest=args[2];
  53.                    dest=dest+"/class"+classSize+"_"+IntToString(incremTEMP);              
  54.                    ofstream myfile (dest.c_str());
  55.                    if (!myfile.is_open()) { //check validity of file
  56.                       cerr << "Error: cannot open the file " << dest << endl;
  57.                       exit (-1);
  58.                    }else{
  59.                       for (int k=0;k<(classSizeTEMP+incremTEMP)/2;k++){
  60.                           myfile<<"LO";
  61.                       }
  62.                    }
  63.               myfile.close();
  64.                     incremTEMP=incremTEMP+atoi(increm.c_str());
  65.                }
  66.            }
  67.     }
  68.     }
  69. }
  70.  
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