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- /* Token.C
- *
- * The text to be parsed is broken into fundamental units called tokens.
- * To parse the LaTeX files, the program interprets and handles these tokens.
- *
- * Copyright 1992 Jonathan Monsarrat. Permission given to freely distribute,
- * edit and use as long as this copyright statement remains intact.
- *
- */
-
- #include <string.h>
- #include <stdio.h>
- #include "Operator.h"
- #include "Global.h"
- #include "Document.h"
-
- /* Gets a new token from the last line read from a file. If no such line
- * exists, it gets a new line from the open file. If no file is open, it
- * opens a new file. If no more files are left to open, returns failure. */
- Token::Token()
- {
- _valid = FALSE;
- Global::files->get_token(*this); // Reads a new token from a file
- }
-
- /* Deal correctly with this new token. */
- void Token::handle()
- {
- // cerr << "Token: " << _text << endl;
- // Look up the appropriate operator from an array of operators.
- Operator *op = Operator::get_operator(_text);
- if(op)
- do
- op->execute(); // Execute the operator.
- while((++op)->isvalid() && op->match(_text));
- else {
- if(_text[0] == '\\' && // Found unknown command and not in a comment
- !Stack::get(Environment::PDocument, Document::Comment, "")) {
- char message[MAXSTRING]; // It's a LaTeX command I don't understand!
- sprintf(message,"Skipping unknown LaTeX command %s", _text);
- Global::files->warning(message);
- return;
- }
- Operator::plaintext(_text); // If no operator, it must be plain text.
- }
- }
-
- int Token::isvalid()
- {
- return(_valid);
- }
-
- void Token::make_text(char *token_text)
- {
- strcpy(_text,token_text);
- _valid = TRUE;
- }
-
- int Token::match(char *str)
- {
- return !strcmp(str,_text);
- }
-
- char *Token::get_text()
- {
- return _text;
- }
-