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Replaced DEBUG macro with LEXER_DEBUG, which is now activated in boxes.h
New tokens to, with, global, once Added LEX_MAX_WARN macro to limit number of lex errors printed per design Replaced exit()s with return YUNREC where errors are not fatal
This commit is contained in:
Thomas Jensen
parent
93793ba1a2
commit
3640421283
116
src/lexer.l
116
src/lexer.l
@ -4,7 +4,7 @@
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* Date created: March 15, 1999 (Monday, 17:16h)
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* Author: Thomas Jensen
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* tsjensen@stud.informatik.uni-erlangen.de
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* Version: $Id: lexer.l,v 1.9 1999/06/22 12:00:05 tsjensen Exp tsjensen $
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* Version: $Id: lexer.l,v 1.10 1999/06/28 12:17:46 tsjensen Exp tsjensen $
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* Language: lex (ANSI C)
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* Purpose: flex lexical analyzer for boxes configuration files
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* Remarks: ---
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@ -12,6 +12,10 @@
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* Revision History:
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*
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* $Log: lexer.l,v $
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* Revision 1.10 1999/06/28 12:17:46 tsjensen
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* Added tokens YBOX and YEND (thus, BOX and END are no longer YKEYWORDs)
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* Added #define FILE_LEXER_L around #include boxes.h to please compiler
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*
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* Revision 1.9 1999/06/22 12:00:05 tsjensen
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* Added #undef DEBUG, because DEBUGging is now activated in boxes.h
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* Added #include tools.h
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@ -53,15 +57,17 @@
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#include "tools.h"
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#include "y.tab.h"
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#undef DEBUG
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/* #define DEBUG */
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#define LEX_MAX_WARN 3 /* number of errors per design */
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static const char rcsid_lexer_l[] =
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"$Id: lexer.l,v 1.9 1999/06/22 12:00:05 tsjensen Exp tsjensen $";
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"$Id: lexer.l,v 1.10 1999/06/28 12:17:46 tsjensen Exp tsjensen $";
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int yylineno = 1;
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int yyerrcnt = 0;
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%}
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@ -77,8 +83,9 @@ int yylineno = 1;
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<SAMPLE1,SHAPES,ELASTIC,INITIAL>\n yylineno++;
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\"[^"\n]*$ {
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yyerror ("Unterminated String at %s", yytext);
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exit (EXIT_FAILURE);
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if (yyerrcnt++ < 5)
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yyerror ("Unterminated String at %s", yytext);
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return YUNREC;
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}
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\"[^"\n]*\" {
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@ -104,16 +111,20 @@ int yylineno = 1;
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yytext[yyleng-1] = '\0';
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--yyleng;
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#ifdef DEBUG
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#ifdef LEXER_DEBUG
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fprintf (stderr, "\n STRING: \"%s\"", yytext);
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#endif
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yylval.s = (char *) strdup (yytext);
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if (yylval.s == NULL) {
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perror (PROJECT);
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exit (EXIT_FAILURE);
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}
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return STRING;
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}
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}
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Sample {
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#ifdef DEBUG
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#ifdef LEXER_DEBUG
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fprintf (stderr, "\n WORD: %s -- STATE SAMPLE1", yytext);
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#endif
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BEGIN SAMPLE1;
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@ -121,7 +132,7 @@ Sample {
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}
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<SAMPLE1>\{ {
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#ifdef DEBUG
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#ifdef LEXER_DEBUG
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fprintf (stderr, "\n SYMBOL: \'%c\' -- STATE SAMPLE2", yytext[0]);
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#endif
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BEGIN SAMPLE2;
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@ -129,8 +140,9 @@ Sample {
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}
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<SAMPLE1>[^{\n\t\r ]+ {
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yyerror ("Syntax Error at \"%s\"", yytext);
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exit (EXIT_FAILURE);
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if (yyerrcnt++ < 5)
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yyerror ("Syntax Error at \"%s\"", yytext);
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return YUNREC;
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}
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<SAMPLE2>\n {
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@ -163,16 +175,21 @@ Sample {
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}
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}
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BEGIN INITIAL;
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#ifdef DEBUG
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#ifdef LEXER_DEBUG
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fprintf (stderr, "\n SAMPLE: %s -- STATE INITIAL", yytext);
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#endif
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yylval.s = (char *) strdup (yytext);
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if (yylval.s == NULL) {
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perror (PROJECT);
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exit (EXIT_FAILURE);
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}
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return STRING;
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}
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}
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else {
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yyerror ("SAMPLE entry must not be empty");
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exit (EXIT_FAILURE);
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if (yyerrcnt++ < 5)
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yyerror ("SAMPLE entry must not be empty");
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return YUNREC;
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}
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}
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@ -180,8 +197,8 @@ Sample {
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yymore();
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}
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elastic {
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#ifdef DEBUG
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Elastic {
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#ifdef LEXER_DEBUG
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fprintf (stderr, "\nYELASTC: %s -- STATE ELASTIC", yytext);
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#endif
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BEGIN ELASTIC;
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@ -189,47 +206,29 @@ elastic {
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}
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Shapes {
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#ifdef DEBUG
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#ifdef LEXER_DEBUG
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fprintf (stderr, "\nYSHAPES: %s -- STATE SHAPES", yytext);
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#endif
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BEGIN SHAPES;
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return YSHAPES;
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}
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Replace {
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#ifdef DEBUG
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fprintf (stderr, "\nYREPLACE: %s", yytext);
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#endif
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return YREPLACE;
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}
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Reverse {
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#ifdef DEBUG
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fprintf (stderr, "\nYREVERSE: %s", yytext);
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#endif
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return YREVERSE;
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}
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Padding {
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#ifdef DEBUG
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fprintf (stderr, "\nYPADDING: %s", yytext);
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#endif
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return YPADDING;
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}
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Box {
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#ifdef DEBUG
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#ifdef LEXER_DEBUG
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fprintf (stderr, "\nYBOX: %s", yytext);
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#endif
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yyerrcnt = 0;
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return YBOX;
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}
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End {
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#ifdef DEBUG
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fprintf (stderr, "\nYEND: %s", yytext);
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#endif
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return YEND;
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}
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Replace { return YREPLACE; }
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Reverse { return YREVERSE; }
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Padding { return YPADDING; }
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End { return YEND; }
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To { return YTO; }
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With { return YWITH; }
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Global { yylval.c = 'g'; return YRXPFLAG; }
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Once { yylval.c = 'o'; return YRXPFLAG; }
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<SHAPES,ELASTIC>nw { yylval.shape = NW; return SHAPE; }
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@ -250,7 +249,7 @@ End {
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<SHAPES,ELASTIC>wnw { yylval.shape = WNW; return SHAPE; }
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<ELASTIC>\) {
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#ifdef DEBUG
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#ifdef LEXER_DEBUG
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fprintf (stderr, "\n SYMBOL: \'%c\' -- STATE INITIAL", yytext[0]);
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#endif
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BEGIN INITIAL;
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@ -258,7 +257,7 @@ End {
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}
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<SHAPES>\} {
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#ifdef DEBUG
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#ifdef LEXER_DEBUG
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fprintf (stderr, "\n SYMBOL: \'%c\' -- STATE INITIAL", yytext[0]);
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#endif
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BEGIN INITIAL;
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@ -270,25 +269,33 @@ author|created|revision|revdate|indent {
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/*
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* general key words
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*/
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#ifdef DEBUG
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#ifdef LEXER_DEBUG
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fprintf (stderr, "\nKEYWORD: %s", yytext);
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#endif
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yylval.s = (char *) strdup (yytext);
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if (yylval.s == NULL) {
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perror (PROJECT);
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exit (EXIT_FAILURE);
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}
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return KEYWORD;
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}
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[a-zA-ZäöüÄÖÜ][a-zA-Z0-9\-_üäöÜÄÖß]* {
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#ifdef DEBUG
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#ifdef LEXER_DEBUG
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fprintf (stderr, "\n WORD: %s", yytext);
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#endif
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yylval.s = (char *) strdup (yytext);
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if (yylval.s == NULL) {
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perror (PROJECT);
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exit (EXIT_FAILURE);
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}
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return WORD;
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}
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[\+-]?[0-9]+ {
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#ifdef DEBUG
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#ifdef LEXER_DEBUG
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fprintf (stderr, "\nYNUMBER: %s", yytext);
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#endif
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yylval.num = atoi (yytext);
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@ -297,7 +304,7 @@ author|created|revision|revdate|indent {
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[,(){}] {
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#ifdef DEBUG
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#ifdef LEXER_DEBUG
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fprintf (stderr, "\n SYMBOL: \'%c\'", yytext[0]);
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#endif
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return yytext[0];
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@ -306,15 +313,16 @@ author|created|revision|revdate|indent {
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#.*$ {
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/* ignore comments */
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#ifdef DEBUG
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#ifdef LEXER_DEBUG
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fprintf (stderr, "\nCOMMENT: %s", yytext+1);
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#endif
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}
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. {
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yyerror ("Unrecognized input at %s", yytext);
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exit (EXIT_FAILURE);
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if (yyerrcnt++ < LEX_MAX_WARN)
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yyerror ("Unrecognized input at %s", yytext);
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return YUNREC;
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}
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