--- /dev/null
+/* DLGLexerBase.h
+ *
+ * SOFTWARE RIGHTS
+ *
+ * We reserve no LEGAL rights to the Purdue Compiler Construction Tool
+ * Set (PCCTS) -- PCCTS is in the public domain. An individual or
+ * company may do whatever they wish with source code distributed with
+ * PCCTS or the code generated by PCCTS, including the incorporation of
+ * PCCTS, or its output, into commerical software.
+ *
+ * We encourage users to develop software with PCCTS. However, we do ask
+ * that credit is given to us for developing PCCTS. By "credit",
+ * we mean that if you incorporate our source code into one of your
+ * programs (commercial product, research project, or otherwise) that you
+ * acknowledge this fact somewhere in the documentation, research report,
+ * etc... If you like PCCTS and have developed a nice tool with the
+ * output, please mention that you developed it using PCCTS. In
+ * addition, we ask that this header remain intact in our source code.
+ * As long as these guidelines are kept, we expect to continue enhancing
+ * this system and expect to make other tools available as they are
+ * completed.
+ *
+ * ANTLR 1.33
+ * Terence Parr
+ * Parr Research Corporation
+ * with Purdue University and AHPCRC, University of Minnesota
+ * 1989-1995
+ */
+
+#ifndef DLGX_H
+#define DLGX_H
+
+#include <stdio.h>
+#include "config.h"
+#include ATOKEN_H
+#include ATOKENSTREAM_H
+
+/* must define what a char looks like; can make this a class too */
+typedef char DLGChar;
+
+/* Can have it as a class too: (ack this looks weird; is it right?)
+class DLGChar {
+private:
+ int c;
+public:
+ DLGChar(int ch) { c = ch; }
+ int atom() { return c; }
+};
+*/
+
+/* user must subclass this */
+class DLGInputStream {
+public:
+ virtual int nextChar() = 0;
+};
+
+/* Predefined char stream: Input from FILE */
+class DLGFileInput : public DLGInputStream {
+private:
+ int found_eof;
+ FILE *input;
+public:
+ DLGFileInput(FILE *f) { input = f; found_eof = 0; }
+ int nextChar() {
+ int c;
+ if ( found_eof ) return EOF;
+ else {
+ c=getc(input);
+ if ( c==EOF ) found_eof = 1;
+ return c;
+ }
+ }
+};
+
+/* Predefined char stream: Input from string */
+class DLGStringInput : public DLGInputStream {
+private:
+ DLGChar *input;
+ DLGChar *p;
+public:
+ DLGStringInput(DLGChar *s) { input = s; p = &input[0];}
+ int nextChar()
+ {
+ if (*p) return (int) *p++;
+ else return EOF;
+ }
+};
+
+class DLGState {
+public:
+ DLGInputStream *input;
+ int interactive;
+ int track_columns;
+ int auto_num;
+ int add_erase;
+ int lookc;
+ int char_full;
+ int begcol, endcol;
+ int line;
+ DLGChar *lextext, *begexpr, *endexpr;
+ int bufsize;
+ int bufovf;
+ DLGChar *nextpos;
+ int class_num;
+};
+
+/* user must subclass this */
+class DLGLexerBase : public ANTLRTokenStream {
+public:
+ virtual ANTLRTokenType erraction();
+
+protected:
+ DLGInputStream *input;
+ int interactive;
+ int track_columns;
+ DLGChar *_lextext; /* text of most recently matched token */
+ DLGChar *_begexpr; /* beginning of last reg expr recogn. */
+ DLGChar *_endexpr; /* beginning of last reg expr recogn. */
+ int _bufsize; /* number of characters in lextext */
+ int _begcol; /* column that first character of token is in*/
+ int _endcol; /* column that last character of token is in */
+ int _line; /* line current token is on */
+ int ch; /* character to determine next state */
+ int bufovf; /* indicates that buffer too small for text */
+ int charfull;
+ DLGChar *nextpos; /* points to next available position in lextext*/
+ int cl;
+ int automaton;
+ int add_erase;
+ DLGChar ebuf[70];
+ _ANTLRTokenPtr token_to_fill;
+
+ virtual _ANTLRTokenPtr getToken();
+
+public:
+ virtual void advance(void) = 0;
+ void skip(void); /* erase lextext, look for antoher token */
+ void more(void); /* keep lextext, look for another token */
+ void mode(int k); /* switch to automaton 'k' */
+ void saveState(DLGState *);
+ void restoreState(DLGState *);
+ virtual ANTLRTokenType nextTokenType(void)=0;/* get next token */
+ void replchar(DLGChar c); /* replace last recognized reg. expr. with
+ a character */
+ void replstr(DLGChar *s); /* replace last recognized reg. expr. with
+ a string */
+ int err_in();
+ void errstd(char *);
+
+ int line() { return _line; }
+ virtual void newline() { _line++; }
+ DLGChar *lextext() { return _lextext; }
+
+ int begcol() { return _begcol; }
+ int endcol() { return _endcol; }
+ void set_begcol(int a) { _begcol=a; }
+ void set_endcol(int a) { _endcol=a; }
+ DLGChar *begexpr() { return _begexpr; }
+ DLGChar *endexpr() { return _endexpr; }
+ int bufsize() { return _bufsize; }
+
+ void setToken(ANTLRAbstractToken *t) { token_to_fill = t; }
+
+ void setInputStream(DLGInputStream *);
+ DLGLexerBase(DLGInputStream *in,
+ unsigned bufsize=2000,
+ int interactive=0,
+ int track_columns=0);
+ virtual ~DLGLexerBase() { delete [] _lextext; }
+ void panic(char *msg);
+
+ void trackColumns() {
+ track_columns = 1;
+ this->_begcol = 0;
+ this->_endcol = 0;
+ }
+};
+
+#endif
projects / pccts / blobdiff