--- /dev/null
+/* DLexer.c\r
+ *\r
+ * SOFTWARE RIGHTS\r
+ *\r
+ * We reserve no LEGAL rights to the Purdue Compiler Construction Tool\r
+ * Set (PCCTS) -- PCCTS is in the public domain. An individual or\r
+ * company may do whatever they wish with source code distributed with\r
+ * PCCTS or the code generated by PCCTS, including the incorporation of\r
+ * PCCTS, or its output, into commerical software.\r
+ *\r
+ * We encourage users to develop software with PCCTS. However, we do ask\r
+ * that credit is given to us for developing PCCTS. By "credit",\r
+ * we mean that if you incorporate our source code into one of your\r
+ * programs (commercial product, research project, or otherwise) that you\r
+ * acknowledge this fact somewhere in the documentation, research report,\r
+ * etc... If you like PCCTS and have developed a nice tool with the\r
+ * output, please mention that you developed it using PCCTS. In\r
+ * addition, we ask that this header remain intact in our source code.\r
+ * As long as these guidelines are kept, we expect to continue enhancing\r
+ * this system and expect to make other tools available as they are\r
+ * completed.\r
+ *\r
+ * ANTLR 1.33\r
+ * Terence Parr\r
+ * Parr Research Corporation\r
+ * with Purdue University and AHPCRC, University of Minnesota\r
+ * 1989-1998\r
+ */\r
+\r
+#define ZZINC {if ( track_columns ) (++_endcol);}\r
+\r
+#define ZZGETC {ch = input->nextChar(); cl = ZZSHIFT(ch);}\r
+\r
+#define ZZNEWSTATE (newstate = dfa[state][cl])\r
+\r
+#ifndef ZZCOPY\r
+#define ZZCOPY \\r
+ /* Truncate matching buffer to size (not an error) */ \\r
+ if (nextpos < lastpos){ \\r
+ *(nextpos++) = ch; \\r
+ }else{ \\r
+ bufovf = 1; \\r
+ }\r
+#endif\r
+\r
+void DLGLexer::\r
+mode( int m )\r
+{\r
+ /* points to base of dfa table */\r
+ if (m<MAX_MODE){\r
+ automaton = m;\r
+ /* have to redo class since using different compression */\r
+ cl = ZZSHIFT(ch);\r
+ }else{\r
+ sprintf((char *)ebuf,"Invalid automaton mode = %d ",m);\r
+ errstd(ebuf);\r
+ }\r
+}\r
+\r
+ANTLRTokenType DLGLexer::\r
+nextTokenType(void)\r
+{\r
+ register int state, newstate;\r
+ /* last space reserved for the null char */\r
+ register DLGChar *lastpos;\r
+ ANTLRTokenType tk;\r
+\r
+skip:\r
+ bufovf = 0;\r
+ lastpos = &_lextext[_bufsize-1];\r
+ nextpos = _lextext;\r
+ _begcol = _endcol+1;\r
+more:\r
+ _begexpr = nextpos;\r
+ if ( interactive ) {\r
+ /* interactive version of automaton */\r
+ /* if there is something in ch, process it */\r
+ state = newstate = dfa_base[automaton];\r
+ if (charfull){\r
+ ZZINC;\r
+ ZZCOPY;\r
+ ZZNEWSTATE;\r
+ }\r
+ while (alternatives[newstate]){\r
+ state = newstate;\r
+ ZZGETC;\r
+ ZZINC;\r
+ ZZCOPY;\r
+ ZZNEWSTATE;\r
+ }\r
+ /* figure out if last character really part of token */\r
+ if ((state != dfa_base[automaton]) && (newstate == DfaStates)){\r
+ charfull = 1;\r
+ --nextpos;\r
+ }else{\r
+ charfull = 0;\r
+ state = newstate;\r
+ }\r
+ *(nextpos) = '\0';\r
+ /* Able to transition out of start state to some non err state?*/\r
+ if ( state == dfa_base[automaton] ){\r
+ /* make sure doesn't get stuck */\r
+ advance();\r
+ }\r
+ }\r
+ else { /* non-interactive version of automaton */\r
+ if (!charfull)\r
+ advance();\r
+ else\r
+ ZZINC;\r
+ state = dfa_base[automaton];\r
+ while (ZZNEWSTATE != DfaStates) {\r
+ state = newstate;\r
+ ZZCOPY;\r
+ ZZGETC;\r
+ ZZINC;\r
+ }\r
+ charfull = 1;\r
+ if ( state == dfa_base[automaton] ){\r
+ if (nextpos < lastpos){\r
+ *(nextpos++) = ch;\r
+ }else{\r
+ bufovf = 1;\r
+ }\r
+ *nextpos = '\0';\r
+ /* make sure doesn't get stuck */\r
+ advance();\r
+ }else{\r
+ *nextpos = '\0';\r
+ }\r
+ }\r
+ if ( track_columns ) _endcol -= charfull;\r
+ _endexpr = nextpos -1;\r
+ add_erase = 0;\r
+#ifdef OLD\r
+ tk = (ANTLRTokenType)\r
+ (*actions[accepts[state]])(this); // must pass this manually\r
+ // actions is not a [] of pointers\r
+ // to member functions.\r
+#endif\r
+ tk = (this->*actions[accepts[state]])();\r
+\r
+// MR1\r
+// MR1 11-Apr-97 Help for tracking DLG results\r
+// MR1\r
+\r
+#ifdef DEBUG_LEXER\r
+\r
+/* MR1 */ if (debugLexerFlag) {\r
+/* MR1 */ if (parser != NULL) {\r
+/* MR1 */ printf("\ntoken name=%s",parser->parserTokenName(tk));\r
+/* MR1 */ } else {\r
+/* MR1 */ printf("\ntoken nnumber=%d",tk);\r
+/* MR1 */ };\r
+/* MR1 */ printf(" lextext=(%s) mode=%d",\r
+/* MR1 */ (_lextext[0]=='\n' && _lextext[1]==0) ?\r
+/* MR1 */ "newline" : _lextext,\r
+/* MR1 */ automaton);\r
+/* MR1 */ if (interactive && !charfull) {\r
+/* MR1 */ printf(" char=empty");\r
+/* MR1 */ } else {\r
+/* MR1 */ if (ch=='\n') {\r
+/* MR1 */ printf(" char=newline");\r
+/* MR1 */ } else {\r
+/* MR1 */ printf(" char=(%c)",ch);\r
+/* MR1 */ };\r
+/* MR1 */ };\r
+/* MR1 */ printf(" %s\n",\r
+/* MR1 */ (add_erase==1 ? "skip()" :\r
+/* MR1 */ add_erase==2 ? "more()" :\r
+/* MR1 */ ""));\r
+/* MR1 */ };\r
+\r
+#endif\r
+\r
+ switch (add_erase) {\r
+ case 1: goto skip;\r
+ case 2: goto more;\r
+ }\r
+ return tk;\r
+}\r
+\r
+void DLGLexer::\r
+advance()\r
+{\r
+ if ( input==NULL ) err_in();\r
+ ZZGETC; charfull = 1; ZZINC;\r
+}\r
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