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/*
Copyright (C) <2009> <Karl Phillip Buhr>
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#include "fpeek.h"
#include <string.h>
#include <stdlib.h>
#include <string.h>
#include <fstream>
#include <iostream>
#include <algorithm>
bool _display_line_num = false;
int main(int argc, char **argv)
{
if (argc < 2)
{
std::cerr << "Usage: " << argv[0] << " <options> <file>\n" <<
"Try '" << argv[0]<< " --help' for more information." << std::endl;
return -1;
}
// Parse command line options
std::vector<std::string> args;
args = cmd_line_handle(argc, argv);
// Checking is file exists
char* filename = argv[argc-1];
std::ifstream file(filename);
if (!file.is_open())
{
std::cerr << filename << ": No such file" << std::endl;
exit(0);
}
// We do not print lines of binary files
char c = 0;
while (file)
{
file.get(c);
if (c < -96)
{
std::cerr << filename << ": Cannot open binary file" << std::endl;
exit(0);
}
}
file.close();
display_lines(filename, args);
return 0;
}
void cmd_line_help(char* invocation)
{
std::cerr << "Usage: "<< invocation <<" [options] <file>\n\n" <<
"Options:\n" <<
" -d, Print line numbers before the result.\n" <<
" -l, --line N Print line N from file. Multiple lines must be separated by the symbol ','.\n" <<
" -r, --range N-M Print range of lines from N to M. Must be separated by '-'.\n" <<
" You can also use ',' when working with multiple ranges.\n" <<
" -h Display this message\n" <<
"\n" <<
"You can visit fpeek homepage at: https://sourceforge.net/projects/fpeek/\n" << std::endl;
exit(0);
return;
}
std::vector<std::string> cmd_line_handle(int argc, char **argv)
{
std::vector<std::string> args;
for(int i=1; i<argc; i++)
{
if (argv[i][0] != '-') continue;
if (!strcmp(argv[i], "--help") ||
!strcmp(argv[i], "-help" ) ||
!strcmp(argv[i], "-h" ))
{
cmd_line_help(argv[0]);
return args;
}
else if(!strcmp(argv[i], "-d"))
{
_display_line_num = true;
}
else if( (!strcmp(argv[i], "-l") || !strcmp(argv[i], "--line") ) && i+1 < argc)
{
args.push_back(argv[i+1]);
i++;
}
else if( (!strcmp(argv[i], "-r") || !strcmp(argv[i], "--range") ) && i+1 < argc)
{
args.push_back(argv[i+1]);
i++;
}
else
{
std::cerr << "Invalid parameter: " << argv[i] << ".\n" << std::endl;
cmd_line_help(argv[0]);
return args;
}
}
if (args.size() == 0)
cmd_line_help(argv[0]);
return args;
}
void display_lines(char* filename, std::vector<std::string> args)
{
std::vector<int> line_vec;
if (args.size() > 0)
{
for (size_t i = 0; i < args.size(); i++)
{
// Parse single lines
char* token = strtok(const_cast<char *>(args.at(i).c_str()), "," );
while (token != NULL)
{
line_vec.push_back(atoi(token));
token = strtok(NULL, ",");
}
}
for (size_t i = 0; i < args.size(); i++)
{
// Parse range of lines
int range_beg = 0;
int range_end = 0;
char* token = strtok(const_cast<char *>(args.at(i).c_str()), "-" );
while (token != NULL)
{
if (!range_beg)
range_beg = atoi(token);
else
range_end = atoi(token);
token = strtok(NULL, ",");
}
for (int i = range_beg; i <= range_end; i++)
line_vec.push_back(i);
}
}
// Magic: search through file and display lines
std::ifstream file(filename);
std::string line;
int pos = 1;
while (std::getline(file, line))
{
// Find if current line should be displayed
std::vector<int>::iterator iter = std::find(line_vec.begin(), line_vec.end(), pos);
if (*iter == pos)
{
if (_display_line_num) // If -d was requested, should print the line number too
{
std::cout << pos << ": ";
}
std::cout << line << std::endl;
}
pos++;
}
return;
}
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