grep.cpp

#include <cppscript>

void search_for_string_in_file(var str, var filename)
{
        try
        {
                var file = read_file(filename);
                finally( file["close"] );
                var line_no = 1;
                foreach(line, lines(file))
                {
                        if( string_find( line, str ) )
                                writeln( filename + ":" + line_no + " " + line );
                        ++line_no;
                }
        }
        catch( var )
        {
                err()["writeln"]("Error reading from file " + filename);
        }
}

void search_for_string_in_files(var str, var files)
{
        foreach( file, files ) search_for_string_in_file(str, file);
}

var script_main(var input)
{
        if(input.size()<2) 
        {
                err()["writeln"]("Usage: grep search_term file1 file2 ...");
                return 1;
        }
        search_for_string_in_files(input[0], tail(input));
        return 0;
}

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