source: branches/0.6-stable/lib/utility.cc @ 456

// $Id: utility.cc 456 2007-08-21 07:56:06Z jari $

/*
  Copyright (C) 2006 Jari Häkkinen, Peter Johansson
  Copyright (C) 2007 Peter Johansson

  This file is part of svndigest, http://trac.thep.lu.se/trac/svndigest

  svndigest 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 2 of the License, or
  (at your option) any later version.

  svndigest 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, write to the Free Software
  Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
  02111-1307, USA.
*/

#include "utility.h"

#include <cstdlib>
#include <fstream>
#include <sstream>
#include <stdexcept>
#include <string>
#include <sys/param.h>
#include <unistd.h>

#include <iostream>

namespace theplu{
namespace svndigest{

  int access_rights(const std::string& path, const std::string& bits)
  {
    if (access(path.c_str(),F_OK)) {
      throw std::runtime_error(std::string("access_rights: ") + path +
                               "' does not exist.");
    }
    int mode=0;
    for (u_int i=0; i<bits.length(); ++i)
      switch (bits[i]) {
          case 'r':
            mode|=R_OK;
            break;
          case 'w':
            mode|=W_OK;
            break;
          case 'x':
            mode|=X_OK;
            break;
      }
    return access(path.c_str(),mode);
  }


  void copy_file(const std::string& source, const std::string& target)
  {
    std::ofstream o(target.c_str());
    std::ifstream i(source.c_str());
    while (i.good()) {
      char ch=i.get();
      if (i.good())
        o.put(ch);
      if (!o.good())
        throw std::runtime_error(std::string("copy_file: ") +
                                 "writing target file failed '" + target + "'");
    }
    if (!i.eof() && (i.bad() || i.fail()))  // fail on everything except eof
      throw std::runtime_error(std::string("copy_file: ") +
                               "error reading source file '" + source + "'");
    i.close(); o.close();
  }


  std::string file_name(const std::string& full_path)
  {
    std::stringstream ss(full_path);
    std::string name;
    while (getline(ss,name,'/')) {}
    return name;
  }


  std::string getenv(const std::string& var)
  {
    char* buffer=std::getenv(var.c_str());
    if (!buffer)
      throw std::runtime_error("Environment variable "+var+" is not set");
    return std::string(buffer);
  }


  std::string hex(int x, u_int width)
  {
    std::stringstream ss;
    ss << std::hex << x;
    if (!width)
      return ss.str();
    if (ss.str().size()<width) 
      return std::string(width-ss.str().size(), '0') + ss.str();
    return ss.str().substr(0, width);
  }


  std::string htrim(std::string str)
  {
    size_t length=str.size();
    while(length && isspace(str[length-1]))
      --length;
    return str.substr(0,length);
  }


  bool is_int(std::string s)
  {
    std::stringstream ss(s);
    int a;
    ss >> a;
    if(ss.fail()) 
      return false;
    // Check that nothing is left on stream
    std::string b;
    ss >> b;
    return b.empty();
  }


  std::string ltrim(std::string str)
  {
    size_t i = 0;
    while(i<str.size() && isspace(str[i]))
      ++i;
    return str.substr(i);
  }


  int percent(int a, int b)
  {
    if (b)
      return (100*a)/b;
    return 0;
  }


  bool node_exist(const std::string& path)
  {
    struct stat buf;
    return !stat(path.c_str(),&buf);
  }


  std::string pwd(void)
  {
    char buffer[MAXPATHLEN];
    if (!getcwd(buffer, MAXPATHLEN))
      throw std::runtime_error("Failed to get current working directory");
    return std::string(buffer);
  }


  void touch(std::string str)
  {
    if (!node_exist(str)) {
      std::ofstream os(str.c_str());
      os.close();
    }
  }

  time_t str2time(const std::string& str)
  {
    //  str in format 2006-09-09T10:55:52.132733Z
    std::stringstream sstream(str);
    time_t rawtime;
    struct tm * timeinfo;
    time ( &rawtime );
    timeinfo =  gmtime ( &rawtime );

    u_int year, month, day, hour, minute, second;
    std::string tmp;
    getline(sstream,tmp,'-');
    year=atoi(tmp.c_str());
    timeinfo->tm_year = year - 1900;

    getline(sstream,tmp,'-');
    month=atoi(tmp.c_str());
    timeinfo->tm_mon = month - 1;

    getline(sstream,tmp,'T');
    day=atoi(tmp.c_str());
    timeinfo->tm_mday = day;

    getline(sstream,tmp,':');
    hour=atoi(tmp.c_str());
    timeinfo->tm_hour = hour;

    getline(sstream,tmp,':');
    minute=atoi(tmp.c_str());
    timeinfo->tm_min = minute;

    getline(sstream,tmp,'.');
    second=atoi(tmp.c_str());
    timeinfo->tm_sec = second;

    return mktime(timeinfo);
  }


  std::string match(std::string::const_iterator& first,
                    const std::string::const_iterator& last,
                    std::string str)
  {
    if (match_begin(first, last, str)){
      first+=str.size();
      return str;
    }
    return std::string();
  }

  notChar::notChar(char c)
    : char_(c)
  {}


  not2Char::not2Char(char c1, char c2)
    : char1_(c1), char2_(c2)
  {}
    

  not2Str::not2Str(std::string s1, std::string s2)
    : str1_(s1), str2_(s2)
  {}
    
}} // end of namespace svndigest and namespace theplu