search and extract

[dante300981]

Hi

if you look at the data below.

dc.w SME_71Usz_C-SME_71Usz, SME_71Usz_35-SME_71Usz	
		
SME_71Usz_C:	dc.b 8	
		
dc.b $E0, $F, 0, 0, $F8	
		
dc.b $E8, 1, 0, $10, $F0	
		
dc.b 0, 8, 0, $12, 0	
		
dc.b 8, $C, 0, $15, $F8	
		
dc.b $10, $C, 0, $19, 0	
		
dc.b $10, 0, 0, $1D, $20	
		
dc.b $18, $D, 0, $1E, $10	
		
dc.b $20, 4, 0, $26, 0	

what can I use to find the "dc.b" string then extract the 5 bytes after it. I probably could use sscanf to extract the bytes eg.

sscanf (txt,"dc.b $%X, $%X, %X, %X, $%X",&x,&size,&flip,&t,&y);

[dante300981]

bump

[zb0S216C]

What you could do is extract each line into a std::vector, where each element is of type std::string. The beauty of std::strings is that they allow easy manipulation of their contents.

So, here's how I would lay it out:

1) Extract an entire line into a std::string with std::getline( ).
2) Add the string to a vector.
3) When all extraction operations are done, search for "dc.b".
4) Once found (if found), do such and such to that line.

_Wazzak

[dante300981]

thanks Framework

#include <iostream>
#include <fstream>
#include <string>
#include <vector>
using namespace std;


int main (){
	vector<string> data;
	string txt = "";
	fstream inFile;
	inFile.open ("source.txt");
	while(!inFile.eof())
		{	getline(inFile,txt);
			data.push_back(txt);
		}
	return 0;
}

would do I use to search for "dc.b" in the vector
can you give an example

[zb0S216C]

Perhaps something like this:

for( unsigned int I( 0 ); I < data.size( ); I++ )
{
    if( data.at( I ).compare( "dc.b" ) == 0 )
    {
        // Match.
    }
}

This code is easy to understand. All it does is call the std::string::compare( ) method for each element within the data vector.

_Wazzak

[dante300981]

The problem with this code is that the elements within the data vector are stored like this

"	       dc.b $E0, $F, 0, 0, $F8	"	
"              dc.b $E8, 1, 0, $10, $F0	"
"	       dc.b 0, 8, 0, $12, 0	"

so the .compare becomes redundant in this case, due to the whole element being compared to "dc.b" and not matching. However I did something like this

#include <iostream>
#include <fstream>
#include <string>
#include <vector>
#include <stdio.h>
using namespace std;


int main (){
	vector<string> data;
	string txt = "";
	fstream inFile;
	inFile.open ("source.txt");
	while(!inFile.eof())
		{	getline(inFile,txt);
			string key = "dc.b";
			int found = -0x1;
			found =  txt.rfind(key);
			if (found != -0x1){
				data.push_back(txt);}
		}
	return 0;
}

This basically puts anything with "dc.b" in it into the vector and discarding any redundant data. Now my problem is what do i use to extract the 5 bytes from each element.

[zb0S216C]

Sorry about my code, it was a late-night post ^_^ What you could do is tokenize each string and parse each token accordingly. For example:

std::string String( "dc.b $E0, $F, 0, 0, $F8" );

char *Token( nullptr );

Token = strtok( ( char * )String.c_str( ), " ," );

while( Token != nullptr )
{
    Token = strtok( nullptr, " ," );

    if( Token == nullptr )
        break;

    // Show each token.
    std::cout << Token << std::endl;
}

Of course, this pulls in C functionality but it works.

_Wazzak