Fix two bugs in cmpp: an unmatched right bracket in cfunc.mod

causes an infinite parsing loop (mod_yacc.y) and XSPICE macros
are replaced in string literals (mod_lex.l).

src/xspice/cmpp/mod_lex.l

@@ -89,6 +89,8 @@ Z	[0-9A-Za-z_]
 			 } while (ch != '\n');
 		        }
 
+\"(\\.|[^"\\])*\"	{return TOK_IDENTIFIER;} /* Literal string. */
+
 ARGS			{return TOK_ARGS;}
 INIT			{return TOK_INIT;}
 CALLBACK		{return TOK_CALLBACK;}

src/xspice/cmpp/mod_yacc.y

@@ -31,20 +31,13 @@ SUMMARY
 INTERFACES
 
     mod_yyparse() -    Function 'yyparse()' is generated automatically
-                       by UNIX 'yacc' utility and then converted to
-                       'mod_yyparse()' by UNIX 'sed' utility under
-                       direction of Makefile.
+                       by UNIX 'yacc' utility.  All yy* global names
+                       are converted to mod_yy* by #define.
 
 REFERENCED FILES
 
     mod_lex.l
 
-NON-STANDARD FEATURES
-
-    Names of functions generated by 'yacc' are translated by 'sed'
-    under direction of the Makefile to prevent collisions with
-    functions generated from ifs_yacc.y.
-
 ============================================================================*/
 
 
@@ -388,8 +381,8 @@ mod_file		: /* empty */
 c_code			: /* empty */
    			| c_code c_char
    			| c_code macro
-			/*| TOK_RPAREN  {yyerror ("Unmatched )"); YYERROR;}
-			| TOK_RBRACKET {yyerror ("Unmatched ]"); YYERROR;}*/
+			| TOK_RPAREN  {yyerror ("Unmatched )"); YYERROR;}
+			| TOK_RBRACKET {yyerror ("Unmatched ]"); YYERROR;}
 			;
 
 buffered_c_code		: {init_buffer();} buffered_c_code2
@@ -416,10 +409,12 @@ buffered_c_char		: TOK_IDENTIFIER {append (mod_yytext);}
 c_char			: TOK_IDENTIFIER {fputs (mod_yytext, mod_yyout);}
 			| TOK_MISC_C {fputs (mod_yytext, mod_yyout);}
 			| TOK_COMMA {fputs (mod_yytext, mod_yyout);}
+			| TOK_LBRACKET TOK_RBRACKET {fputs ("[]", mod_yyout);}
 			| TOK_LBRACKET 
 				{putc ('[', mod_yyout);}
 			  c_code TOK_RBRACKET
 				{putc (']', mod_yyout);}
+			| TOK_LPAREN TOK_RPAREN {fputs ("()", mod_yyout);}
 			| TOK_LPAREN
 				{putc ('(', mod_yyout);}
 			  c_code TOK_RPAREN