static String determineFileType(BufferedReader bufferedReader) {
// JVXL should be on the FIRST line of the file, but it may be
// after comments or missing.
// Apbs, Jvxl, or Cube
String line;
LimitedLineReader br = new LimitedLineReader(bufferedReader, 16000);
// sure bets, but not REQUIRED:
if ((line = br.info()).indexOf("#JVXL+") == 0) return "Jvxl+";
if (line.indexOf("#JVXL") == 0) return "Jvxl";
if (line.indexOf("&plot") == 0) return "Jaguar";
if (line.indexOf("!NTITLE") >= 0 || line.indexOf("REMARKS ") >= 0) return "Xplor";
line = br.readNonCommentLine();
if (line.indexOf("object 1 class gridpositions counts") == 0) return "Apbs";
// Jvxl, or Cube, maybe formatted Plt
String[] tokens = Parser.getTokens(line);
line = br.readNonCommentLine(); // second line
if (tokens.length == 2
&& Parser.parseInt(tokens[0]) == 3
&& Parser.parseInt(tokens[1]) != Integer.MIN_VALUE) {
tokens = Parser.getTokens(line);
if (tokens.length == 3
&& Parser.parseInt(tokens[0]) != Integer.MIN_VALUE
&& Parser.parseInt(tokens[1]) != Integer.MIN_VALUE
&& Parser.parseInt(tokens[2]) != Integer.MIN_VALUE) return "PltFormatted";
}
line = br.readNonCommentLine(); // third line
// next line should be the atom line
int nAtoms = Parser.parseInt(line);
if (nAtoms == Integer.MIN_VALUE) return (line.indexOf("+") == 0 ? "Jvxl+" : "UNKNOWN");
if (nAtoms >= 0) return "Cube"; // Can't be a Jvxl file
nAtoms = -nAtoms;
for (int i = 4 + nAtoms; --i >= 0; )
if ((line = br.readNonCommentLine()) == null) return "UNKNOWN";
int nSurfaces = Parser.parseInt(line);
if (nSurfaces == Integer.MIN_VALUE) return "UNKNOWN";
return (nSurfaces < 0 ? "Jvxl" : "Cube"); // Final test looks at surface definition line
}
int parseInt(String s, int iStart) {
next[0] = iStart;
return Parser.parseInt(s, next);
}
int parseIntNext(String s) {
return Parser.parseInt(s, next);
}
int parseInt(String s) {
next[0] = 0;
return Parser.parseInt(s, next);
}
int parseInt() {
return Parser.parseInt(line, next);
}
protected int parseInt(String s, int iStart, int iEnd) {
next[0] = iStart;
return Parser.parseInt(s, iEnd, next);
}