how to read this file

[solo2wolf]

I've been working on this all day and am running close to a deadline, would be fantastic if anyone could help.

I have a file formatted as follows:

character 8bit_hexbase_number 8bit_hexbase_number

so an example file would look like:

1 0x00000000
1 0x00000004
0 0x00000800 0x00000000
1 0x00000008
1 0x0000000C
1 0x00000010
0 0x00000804 0x0000000A
0 0x00000808 0xFFFFFFFF
0 0x0000080C 0x5A5A5A5A
1 0x00000014

I don't mind handling them all as strings as they are only used to represent things not actually operate on.

I do need to separate each string though when I'm reading it into my program and I don't know how to as the length of each number may vary.

Can anyone think of a way to read each number/string in and store it so that for example line1 number1=1, number 2=0x00000000 and number3=0?

Is there a function which will read in strings seperated by white space characters as separate strings?
many thanks

[Moschops]

Something along these lines would do the job. It's clumsy, but hopefully easy to understand. I don't promise it's exactly correct, but this sort of thing would do it. It ends up with lineStore, a vector of lines structures, each one of which is the three values. I've assumed that it's a text file that literally reads as above.

This method does not rely on every short line starting with 1 (but does rely on every short line beginning with a single digit or character). If you can promise that every short line begins with 1, then it can be made much simpler.

struct lines
{
  string character;
  string eightbit_hexbase_number1;
  string eightbit_hexbase_number2;
}

ifstream infile("filename");

vector<lines> lineStore;
line tempHoldingLine;
int skip = 0;

while(notYetReachedTheEndOfTheFile) // Work this out yourself :)
{
  if (!skip)
  {  infile >> tempHoldingLine.character;}

  infile >> tempHoldingLine.eightbit_hexbase_number1;
  infile >> tempHoldingLine.eightbit_hexbase_number2;

  // less than elegant way of dealing with short line
  if (tempHoldingLine.eightbit_hexbase_number2.length() == 1)
  {
     string theNextCharacter = tempHoldingLine.eightbit_hexbase_number2;
     tempHoldingLine.eightbit_hexbase_number2 = 0;
     skip = 1;
     lineStore.push_back(tempHoldingLine);
     tempHoldingLine.character = theNextCharacter;
  }
  else
  {
     // It was a full line of three
     lineStore.push_back(tempHoldingLine);
     skip = 0;
   }
}

[EGD Eric]

Hi Solo2wolf,

You could use the ifstream class, and use that to read your lines.

ifstream file = new ifstream("file_name.txt");
 //try/catch block should be here, blah blah

while(!file.eof())
{
    char * str = file.getline();
    //TODO: split the line into multiple strings, delimited by space
       //do whatever it is you're supposed to do with them
}

file.close();

To split the string, you could use strtok(str, " "), or the boost library's "split" function.

Can anyone think of a way to read each number/string in and store it so that for example line1 number1=1, number 2=0x00000000 and number3=0?

I'm not sure what you mean here.

[Moschops]

ifstream file = new ifstream("file_name.txt");
new? Surely not :)

char * str = file.getline();
There is no getline in C++ that returns a char pointer, or that takes no parameters.