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/*
* utils.cc -- global utility functions for ePiX
*
* This file is part of ePiX, a C++ library for creating high-quality
* figures in LaTeX
*
* Version 1.2.5
* Last Change: June 18, 2008
*/
/*
* Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
* Andrew D. Hwang <rot 13 nujnat at zngupf dot ubylpebff dot rqh>
* Department of Mathematics and Computer Science
* College of the Holy Cross
* Worcester, MA, 01610-2395, USA
*/
/*
* ePiX 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.
*
* ePiX 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 ePiX; if not, write to the Free Software Foundation, Inc.,
* 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <string>
#include <cmath>
#include <ctime>
#include "constants.h"
#include "utils.h"
namespace ePiX {
const std::string epix_version()
{
return "1.2.6";
}
double truncate(double arg)
{
return fabs(arg) < 0.0001 ? 0 : arg; // 10^-4, avoid exponential notation
}
std::string date_and_time()
{
////// N.B.: Revise this if time format string changes!
const int max_len = 31;
char buf[max_len];
time_t t=time(0);
// strftime(buf, max_len, "%c", localtime(&t));
// Sat Jul 1 23:25:39 2006 (GMT)
strftime(buf, max_len, "%a %b %d %X %Y (%Z)", gmtime(&t));
return std::string(buf);
}
// remove everything from arg except chars in srch
std::string get_chars(std::string arg, const std::string& srch)
{
std::string::size_type curr(0);
std::string::size_type next(arg.find_first_of(srch));
while (next != std::string::npos)
{
arg.erase(curr, next-curr);
curr = arg.find_first_not_of(srch);
next = arg.find_first_of(srch, curr);
}
if (next != curr)
arg.erase(curr, next);
return arg;
}
// add linebreaks before opening parentheses to make lines at most
// FILE_WIDTH characters long; return reference to arg
std::string break_lines(std::string arg, const std::string& path_break)
{
std::string value; // append here; swap with arg at end
// initialize markers prev, curr, next
std::string::size_type prev(0); // position of last line break
std::string::size_type next(arg.find_first_of("("));
std::string::size_type curr(next);
unsigned int pbk_sz(path_break.size());
while (next != std::string::npos)
{
// seek next break points
while (next-prev <= EPIX_FILE_WIDTH - pbk_sz)
{
curr = next;
next = arg.find_first_of("(", ++next);
}
value.append(arg, prev, curr-prev); // append current line
// Magic number 20 (greater than width of a printed pair)
if (next - prev <= 20+EPIX_FILE_WIDTH) // not at end of data
value += path_break; // and formatting string
prev = curr; // update front of line
}
// get remaining characters
value.append(arg, prev, next-prev);
swap(arg, value);
return arg;
}
} // end of namespace
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