/**
* Refills the input buffer.
*
* @return <code>false</code>, iff there was new input.
* @exception IOException if any I/O-Error occurs
*/
private boolean yy_refill() throws java.io.IOException {
/* first: make room (if you can) */
if (yy_startRead > 0) {
System.arraycopy(yy_buffer, yy_startRead, yy_buffer, 0, yy_endRead - yy_startRead);
/* translate stored positions */
yy_endRead -= yy_startRead;
yy_currentPos -= yy_startRead;
yy_markedPos -= yy_startRead;
yy_pushbackPos -= yy_startRead;
yy_startRead = 0;
}
/* is the buffer big enough? */
if (yy_currentPos >= yy_buffer.length) {
/* if not: blow it up */
char newBuffer[] = new char[yy_currentPos * 2];
System.arraycopy(yy_buffer, 0, newBuffer, 0, yy_buffer.length);
yy_buffer = newBuffer;
}
/* finally: fill the buffer with new input */
int numRead = yy_reader.read(yy_buffer, yy_endRead, yy_buffer.length - yy_endRead);
if (numRead < 0) {
return true;
} else {
yy_endRead += numRead;
return false;
}
}
/**
* Refills the input buffer.
*
* @return <code>false</code>, iff there was new input.
* @exception java.io.IOException if any I/O-Error occurs
*/
private boolean zzRefill() throws java.io.IOException {
/* first: make room (if you can) */
if (zzStartRead > 0) {
System.arraycopy(zzBuffer, zzStartRead, zzBuffer, 0, zzEndRead - zzStartRead);
/* translate stored positions */
zzEndRead -= zzStartRead;
zzCurrentPos -= zzStartRead;
zzMarkedPos -= zzStartRead;
zzPushbackPos -= zzStartRead;
zzStartRead = 0;
}
/* is the buffer big enough? */
if (zzCurrentPos >= zzBuffer.length) {
/* if not: blow it up */
char newBuffer[] = new char[zzCurrentPos * 2];
System.arraycopy(zzBuffer, 0, newBuffer, 0, zzBuffer.length);
zzBuffer = newBuffer;
}
/* finally: fill the buffer with new input */
int numRead = zzReader.read(zzBuffer, zzEndRead, zzBuffer.length - zzEndRead);
if (numRead < 0) {
return true;
} else {
zzEndRead += numRead;
return false;
}
}
/**
* Refills the input buffer.
*
* @return <code>false</code>, iff there was new input.
* @exception java.io.IOException if any I/O-Error occurs
*/
private boolean zzRefill() throws java.io.IOException {
/* first: make room (if you can) */
if (zzStartRead > 0) {
zzEndRead += zzFinalHighSurrogate;
zzFinalHighSurrogate = 0;
System.arraycopy(zzBuffer, zzStartRead, zzBuffer, 0, zzEndRead - zzStartRead);
/* translate stored positions */
zzEndRead -= zzStartRead;
zzCurrentPos -= zzStartRead;
zzMarkedPos -= zzStartRead;
zzStartRead = 0;
}
/* is the buffer big enough? */
if (zzCurrentPos >= zzBuffer.length - zzFinalHighSurrogate) {
/* if not: blow it up */
char newBuffer[] = new char[zzBuffer.length * 2];
System.arraycopy(zzBuffer, 0, newBuffer, 0, zzBuffer.length);
zzBuffer = newBuffer;
zzEndRead += zzFinalHighSurrogate;
zzFinalHighSurrogate = 0;
}
/* fill the buffer with new input */
int requested = zzBuffer.length - zzEndRead;
int totalRead = 0;
while (totalRead < requested) {
int numRead = zzReader.read(zzBuffer, zzEndRead + totalRead, requested - totalRead);
if (numRead == -1) {
break;
}
totalRead += numRead;
}
if (totalRead > 0) {
zzEndRead += totalRead;
if (totalRead == requested) {
/* possibly more input available */
if (Character.isHighSurrogate(zzBuffer[zzEndRead - 1])) {
--zzEndRead;
zzFinalHighSurrogate = 1;
}
}
return false;
}
// totalRead = 0: End of stream
return true;
}
/**
* Refills the input buffer.
*
* @return <code>false</code>, iff there was new input.
* @exception java.io.IOException if any I/O-Error occurs
*/
private boolean zzRefill() throws java.io.IOException {
/* first: make room (if you can) */
if (zzStartRead > 0) {
System.arraycopy(zzBuffer, zzStartRead, zzBuffer, 0, zzEndRead - zzStartRead);
/* translate stored positions */
zzEndRead -= zzStartRead;
zzCurrentPos -= zzStartRead;
zzMarkedPos -= zzStartRead;
zzStartRead = 0;
}
/* is the buffer big enough? */
if (zzCurrentPos >= zzBuffer.length) {
/* if not: blow it up */
char newBuffer[] = new char[zzCurrentPos * 2];
System.arraycopy(zzBuffer, 0, newBuffer, 0, zzBuffer.length);
zzBuffer = newBuffer;
}
/* finally: fill the buffer with new input */
int numRead = zzReader.read(zzBuffer, zzEndRead, zzBuffer.length - zzEndRead);
if (numRead > 0) {
zzEndRead += numRead;
return false;
}
// unlikely but not impossible: read 0 characters, but not at end of stream
if (numRead == 0) {
int c = zzReader.read();
if (c == -1) {
return true;
} else {
zzBuffer[zzEndRead++] = (char) c;
return false;
}
}
// numRead < 0
return true;
}
public static void main(String args[]) throws Exception {
Yylex l = null;
parser p;
Interpreter I;
try {
if (args.length == 0) l = new Yylex(System.in);
else l = new Yylex(new FileReader(args[0]));
} catch (FileNotFoundException e) {
System.err.println("Error: File not found: " + args[0]);
System.exit(1);
}
p = new parser(l);
/* The default parser is the first-defined entry point. */
/* You may want to change this. Other options are: */
/* */
try {
calc.Absyn.Exp parse_tree = p.pExp();
I = new Interpreter();
// I.eval(parse_tree) ;
System.out.println(I.eval(parse_tree));
/*System.out.println();
System.out.println("Parse Succesful!");
System.out.println();
System.out.println("[Abstract Syntax]");
System.out.println();
System.out.println(PrettyPrinter.show(parse_tree));
System.out.println();
System.out.println("[Linearized Tree]");
System.out.println();
System.out.println(PrettyPrinter.print(parse_tree));
*/
} catch (Throwable e) {
System.err.println(
"At line " + String.valueOf(l.line_num()) + ", near \"" + l.buff() + "\" :");
System.err.println(" " + e.getMessage());
System.exit(1);
}
}
private void chars_expand() {
char temp[] = new char[chars_size * 2];
System.arraycopy(chars, 0, temp, 0, chars_size);
chars_size *= 2;
chars = temp;
}
public static void main(String[] args) throws IOException // may be thrown by the scanner
{
// check for command-line args
if (args.length != 2) {
System.err.println(
"please supply name of file to be parsed and name of file for unparsed version.");
System.exit(-1);
}
try {
Codegen.p = new PrintWriter("/home/ben/Scripts/github/Academic/cs 536/p6/gencode.asm");
} catch (FileNotFoundException e) {
System.err.println("File " + args[0] + " not found.");
System.exit(-1);
}
// open input file
FileReader inFile = null;
try {
inFile = new FileReader(args[0]);
} catch (FileNotFoundException ex) {
System.err.println("File " + args[0] + " not found.");
System.exit(-1);
}
// open output file
PrintWriter outFile = null;
try {
outFile = new PrintWriter(args[1]);
} catch (FileNotFoundException ex) {
System.err.println("File " + args[1] + " could not be opened for writing.");
System.exit(-1);
}
parser P = new parser(new Yylex(inFile));
Symbol root = null; // the parser will return a Symbol whose value
// field is the translation of the root
// nonterminal (i.e., of the nonterminal
// "program")
try {
root = P.parse(); // do the parse
System.out.println("Little program parsed correctly.");
} catch (Exception ex) {
System.err.println("Exception occured during parse: " + ex);
ex.printStackTrace();
System.exit(-1);
}
try {
// ((SymTabNode)root.value).provideSymTab(new SymTab());
((ProgramNode) root.value).processNames();
} catch (Exception ex) {
System.err.println("Exception occured during parse: " + ex);
ex.printStackTrace();
System.exit(-1);
}
if (!Errors.errors) {
((ASTnode) root.value).unparse(outFile, 0);
try {
((ProgramNode) root.value).typeCheck();
} catch (Exception ex) {
System.err.println("Exception occured during typecheck: " + ex);
ex.printStackTrace();
System.exit(-1);
}
}
if (!Errors.errors) {
try {
((ProgramNode) root.value).generate();
Codegen.p.close();
} catch (Exception ex) {
System.err.println("Exception occured during codegen: " + ex);
ex.printStackTrace();
System.exit(-1);
}
}
outFile.close();
return;
}
