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/****************************************************************************
Xplanet 0.94 - render an image of a planet into an X window
Copyright (C) 2002 Hari Nair <hari@alumni.caltech.edu>
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
****************************************************************************/
#include <cstdio>
#include <cstring>
#include <iostream>
using namespace std;
#include "keywords.h"
bool
isDelimiter(char c)
{
return(c == ' ' || c == '\t' || c == ',' || c == '/');
}
bool
isEndOfLine(char c)
{
// 13 is DOS end-of-line, 28 is the file separator
return(c == '#' || c == '\0' || c == 13 || c == 28);
}
static void
skipPastToken(int &i, const char *line)
{
while (!isDelimiter(line[i]))
{
if (isEndOfLine(line[i])) return;
i++;
}
}
static bool
getValue(const char *line, int &i, const char *key, char *&returnstring)
{
const unsigned int length = strlen(key);
if (strncmp(line + i, key, length) == 0)
{
i += length;
int istart = i;
skipPastToken(i, line);
returnstring = new char[i - istart + 1];
strncpy(returnstring, (line + istart), i - istart);
returnstring[i-istart] = '\0';
return(true);
}
return(false);
}
// This routine returns the next token in the line and its type.
int
parse(int &i, const char *line, char *&returnstring)
{
if (i >= (int) strlen(line)) return(ENDOFLINE);
if (returnstring != NULL) cerr << "returnstring is not NULL!\n";
int returnval = UNKNOWN;
if (isDelimiter(line[i]))
returnval = DELIMITER;
else if (isEndOfLine(line[i]))
returnval = ENDOFLINE;
else if (getValue(line, i, "align=", returnstring))
returnval = ALIGN;
else if (getValue(line, i, "altcirc=", returnstring))
returnval = ALTCIRC;
else if (getValue(line, i, "color=", returnstring))
returnval = COLOR;
else if (getValue(line, i, "font=", returnstring))
returnval = FONT;
else if (getValue(line, i, "fontsize=", returnstring))
returnval = FONTSIZE;
else if (getValue(line, i, "image=", returnstring))
returnval = IMAGE;
else if (getValue(line, i, "symbolsize=", returnstring))
returnval = SYMBOLSIZE;
else if (getValue(line, i, "position=", returnstring))
returnval = POSITION;
else if (getValue(line, i, "radius=", returnstring))
returnval = RADIUS;
else if (getValue(line, i, "spacing=", returnstring))
returnval = SPACING;
else if (line[i] == '"')
{
int istart = ++i;
while (line[i] != '"')
{
i++;
if (i >= (int) strlen(line))
{
cerr << "Unterminated string in marker file!\n";
return(UNKNOWN);
}
}
returnstring = new char[i - istart + 1];
strncpy(returnstring, (line + istart), i - istart);
returnstring[i-istart] = '\0';
returnval = NAME;
}
else if (line[i] == '{')
{
int istart = ++i;
while (line[i] != '}')
{
i++;
if (i >= (int) strlen(line))
{
cerr << "Unterminated string in marker file!\n";
return(UNKNOWN);
}
}
returnstring = new char[i - istart + 1];
strncpy(returnstring, (line + istart), i - istart);
returnstring[i-istart] = '\0';
returnval = NAME;
}
else if (strncmp(line+i, "timezone=", 9) == 0)
{
i += 9;
int istart = i;
while (line[i] == '/' || line[i] == ',' || !isDelimiter(line[i]))
{
if (isEndOfLine(line[i])) break;
i++;
}
returnstring = new char[i - istart + 1];
strncpy(returnstring, (line + istart), i - istart);
returnstring[i-istart] = '\0';
returnval = TIMEZONE;
}
else if (strncmp(line+i, "trail={", 7) == 0)
{
i += 7;
int istart = i;
while (line[i] != '}')
{
i++;
if (i >= (int) strlen(line))
{
cerr << "Unterminated trail value in satellite file!\n";
return(UNKNOWN);
}
}
returnstring = new char[i - istart + 1];
strncpy(returnstring, (line + istart), i - istart);
returnstring[i-istart] = '\0';
returnval = TRAIL;
}
else if (strncmp(line+i, "transparent={", 13) == 0)
{
i += 13;
int istart = i;
while (line[i] != '}')
{
i++;
if (i >= (int) strlen(line))
{
cerr << "Unterminated pixel value in marker file!\n";
return(UNKNOWN);
}
}
returnstring = new char[i - istart + 1];
strncpy(returnstring, (line + istart), i - istart);
returnstring[i-istart] = '\0';
returnval = TRANSPARENT;
}
else // assume it's a latitude/longitude value
{
int istart = i;
skipPastToken(i, line);
returnstring = new char[i - istart + 1];
strncpy(returnstring, (line + istart), i - istart);
returnstring[i-istart] = '\0';
double temp;
sscanf(returnstring, "%lf", &temp);
if (temp > -360 && temp < 360)
{
returnval = LATLON; // else defaults to UNKNOWN
}
}
#if 0
if (opts.debug)
{
string returntype;
switch (returnval)
{
case UNKNOWN:
returntype = "UNKNOWN";
break;
case DELIMITER:
returntype = "DELIMITER";
break;
case ENDOFLINE:
returntype = "ENDOFLINE";
break;
case ALIGN:
returntype = "ALIGN";
break;
case COLOR:
returntype = "COLOR";
break;
case FONT:
returntype = "FONT";
break;
case FONTSIZE:
returntype = "FONTSIZE";
break;
case IMAGE:
returntype = "IMAGE";
break;
case POSITION:
returntype = "POSITION";
break;
case SPACING:
returntype = "SPACING";
break;
case NAME:
returntype = "NAME";
break;
case TIMEZONE:
returntype = "TIMEZONE";
case TRANSPARENT:
returntype = "TRANSPARENT";
break;
case LATLON:
returntype = "LATLON";
break;
default:
returntype = "?";
}
cout << "token is "
<< (returnstring == NULL ? "NULL" : returnstring)
<< "\t(" << returntype << ")"
<< endl;
}
#endif
return(returnval);
}
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