Task: Just in time processing on a character stream


C++: #include <vector>
#include <iostream>
#include <fstream>
#include <sstream>

typedef struct {
    int s[4];
}userI;

class jit{
public:
    void decode( std::string& file, std::vector<userI>& ui ) {
        std::ifstream f( file.c_str(), std::ios_base::in );
        fileBuffer = std::string( ( std::istreambuf_iterator<char>( f ) ), std::istreambuf_iterator<char>() );
        f.close();
        for( std::vector<userI>::iterator t = ui.begin(); t != ui.end(); t++ ) {
            if( !decode( ( *t ).s ) ) break;
        }
        std::cout << "\n\n";
    }
private:
    bool decode( int* ui ) {
        int l = 0, t = 0, p = 0, c = 0, a = 0;
        for( std::string::iterator i = fileBuffer.begin(); i != fileBuffer.end(); i++ ) {
            if( p == ui[0] && l == ui[1] && t == ui[2] && c == ui[3] ) {
                if( *i == '!' )  return false;
                std::cout << *i; return true;
            }
            if( *i == '\n' )      { l++; t = c = 0; }  
            else if( *i == '\t' ) { t++; c = 0; }
            else if( *i == '\f' ) { p++; l = t = c = 0; }
            else                  { c++;}
        }
        return false;
    }
    std::string fileBuffer;
};
void getUserInput( std::vector<userI>& u ) {
    std::string h = "0 18 0 0 0 68 0 1 0 100 0 32 0 114 0 45 0 38 0 26 0 16 0 21 0 17 0 59 0 11 "
                    "0 29 0 102 0 0 0 10 0 50 0 39 0 42 0 33 0 50 0 46 0 54 0 76 0 47 0 84 2 28";
    
    std::stringstream ss( h );
    userI a;
    int x = 0;
    while( std::getline( ss, h, ' ' ) ) {
        a.s[x] = atoi( h.c_str() );
        if( ++x == 4 ) {
            u.push_back( a );
            x = 0;
        }
    }
}
int main( int argc, char* argv[] ) {
    std::vector<userI> ui;
    getUserInput( ui );

    jit j;
    j.decode( std::string( "theRaven.txt" ), ui );
    return 0;
}






Python: import sys

class UserInput:
    def __init__(self,chunk):
        self.formFeed = int(chunk[0])
        self.lineFeed = int(chunk[1])
        self.tab = int(chunk[2])
        self.space = int(chunk[3])

    def __str__(self):
        return "(ff=%d; lf=%d; tb=%d; sp%d)" % (self.formFeed,self.lineFeed,self.tab,self.space)

def chunks(l,n):
    for i in xrange(0, len(l), n):
        yield l[i:i+n]

def getUserInput():
    h = "0 18 0 0 0 68 0 1 0 100 0 32 0 114 0 45 0 38 0 26 0 16 0 21 0 17 0 59 0 11 "\
        "0 29 0 102 0 0 0 10 0 50 0 39 0 42 0 33 0 50 0 46 0 54 0 76 0 47 0 84 2 28"
    ha = h.split()
    return [UserInput(chunk) for chunk in chunks(ha, 4)]

def decode(filename,uiList):
    f = open(filename, "r")
    text = f.read()

    def decode2(ui):
        f = 0
        l = 0
        t = 0
        s = 0
        for c in text:
            if f == ui.formFeed and l == ui.lineFeed and t == ui.tab and s == ui.space:
                if c == '!':
                    return False
                sys.stdout.write(c)
                return True
            if c == '\u000c':
                f=f+1
                l=0
                t=0
                s=0
            elif c == '\n':
                l=l+1
                t=0
                s=0
            elif c == '\t':
                t=t+1
                s=0
            else:
                s=s+1
        return False

    for ui in uiList:
        if not decode2(ui):
            break
    print



uiList = getUserInput()
decode("theRaven.txt", uiList)