UNIX 6th Ed. - /usr/source/yacc/lib/zerr.c

   1: extern int yyline;  /* input line number */
   2: 
   3: yyerror(s) char *s; {
   4:   extern int yychar;
   5:   extern char *yysterm[];
   6:   printf("\n%s", s );
   7:   if( yyline ) printf(", line %d,", yyline );
   8:   printf(" on input: ");
   9:   if( yychar >= 0400 ) printf("%s\n", yysterm[yychar-0400] );
  10:   else switch ( yychar ) {
  11:     case '\t': printf( "\\t\n" ); return;
  12:     case '\n': printf( "\\n\n" ); return;
  13:     case '\0': printf( "$end\n" ); return;
  14:     default: printf( "%c\n" , yychar ); return;
  15:     }
  16:   }

Defined functions