/* *  Stage : a multi-robot simulator. *  Copyright (C) 2001, 2002 Richard Vaughan, Andrew Howard and Brian Gerkey. * *  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 2 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, write to the Free Software *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA * *//* * Desc: Some useful color routines * Author: Andrew Howard, Richard Vaughan * Date: 8 Jun 2002 * CVS info: $Id: colors.cc,v 1.2.8.1 2003/04/17 23:40:10 rtv Exp $ */#include <errno.h>#include <string.h>#include <stdio.h>#include "stage_types.hh"#include "colors.hh"///////////////////////////////////////////////////////////////////////////// Look up the color in a data based (transform color name -> color value).StageColor LookupColor(const char *name){  FILE *file;  const char *filename;    filename = COLOR_DATABASE;  file = fopen(filename, "r");  if (!file)  {    PRINT_ERR2("unable to open the X11 color database %s : %s",               filename, strerror(errno));    fclose(file);    return 0xFFFFFF;  }    while (true)  {    char line[1024];    if (!fgets(line, sizeof(line), file))      break;    // it's a macro or comment line - ignore the line    if (line[0] == '!' || line[0] == '#' || line[0] == '%')       continue;    // Trim the trailing space    while (strchr(" \t\n", line[strlen(line)-1]))      line[strlen(line)-1] = 0;    // Read the color    int r, g, b;    int chars_matched = 0;    sscanf( line, "%d %d %d %n", &r, &g, &b, &chars_matched );          // Read the name    char* nname = line + chars_matched;    // If the name matches    if (strcmp(nname, name) == 0)    {      fclose(file);      return ((r << 16) | (g << 8) | b);    }  }  PRINT_WARN1("unable to find color [%s]; using default (red)", name);  fclose(file);  return 0xFF0000;}