widl: Add support for the builtin constants "TRUE" and "FALSE".

tools/widl/header.c

@@ -410,6 +410,12 @@ void write_expr(FILE *h, const expr_t *e, int brackets)
   case EXPR_HEXNUM:
     fprintf(h, "0x%lx", e->u.lval);
     break;
+  case EXPR_TRUEFALSE:
+    if (e->u.lval == 0)
+      fprintf(h, "FALSE");
+    else
+      fprintf(h, "TRUE");
+    break;
   case EXPR_IDENTIFIER:
     fprintf(h, "%s", e->u.sval);
     break;

tools/widl/parser.l

@@ -172,6 +172,8 @@ static struct keyword {
 	int token;
 	int val;
 } keywords[] = {
+	{"FALSE",			tFALSE},
+	{"TRUE",			tTRUE},
 	{"__cdecl",			tCDECL},
 	{"__int64",			tINT64},
 	{"__stdcall",			tSTDCALL},
@@ -307,7 +309,7 @@ static struct keyword {
 	{"version",			tVERSION},
 	{"void",			tVOID},
 	{"wchar_t",			tWCHAR},
-	{"wire_marshal",		tWIREMARSHAL}
+	{"wire_marshal",		tWIREMARSHAL},
 };
 #define NKEYWORDS (sizeof(keywords)/sizeof(keywords[0]))
 #define KWP(p) ((const struct keyword *)(p))

tools/widl/parser.y

@@ -141,6 +141,7 @@ static type_t std_uhyper = { "MIDL_uhyper" };
 %token tENDPOINT
 %token tENTRY tENUM tERRORSTATUST
 %token tEXPLICITHANDLE tEXTERN
+%token tFALSE
 %token tFLOAT
 %token tHANDLE
 %token tHANDLET
@@ -188,6 +189,7 @@ static type_t std_uhyper = { "MIDL_uhyper" };
 %token tSTRING tSTRUCT
 %token tSWITCH tSWITCHIS tSWITCHTYPE
 %token tTRANSMITAS
+%token tTRUE
 %token tTYPEDEF
 %token tUNION
 %token tUNIQUE
@@ -496,6 +498,8 @@ m_expr:						{ $$ = make_expr(EXPR_VOID); }
 
 expr:	  aNUM					{ $$ = make_exprl(EXPR_NUM, $1); }
 	| aHEXNUM				{ $$ = make_exprl(EXPR_HEXNUM, $1); }
+	| tFALSE				{ $$ = make_exprl(EXPR_TRUEFALSE, 0); }
+	| tTRUE					{ $$ = make_exprl(EXPR_TRUEFALSE, 1); }
 	| aIDENTIFIER				{ $$ = make_exprs(EXPR_IDENTIFIER, $1); }
 	| expr '?' expr ':' expr		{ $$ = make_expr3(EXPR_COND, $1, $3, $5); }
 	| expr '|' expr				{ $$ = make_expr2(EXPR_OR , $1, $3); }
@@ -859,7 +863,9 @@ static expr_t *make_exprl(enum expr_type type, long val)
   e->is_const = FALSE;
   INIT_LINK(e);
   /* check for numeric constant */
-  if (type == EXPR_NUM || type == EXPR_HEXNUM) {
+  if (type == EXPR_NUM || type == EXPR_HEXNUM || type == EXPR_TRUEFALSE) {
+    /* make sure true/false value is valid */
+    assert(type != EXPR_TRUEFALSE || val == 0 || val == 1);
     e->is_const = TRUE;
     e->cval = val;
   }

tools/widl/typegen.c

@@ -73,6 +73,7 @@ static int compare_expr(const expr_t *a, const expr_t *b)
     {
         case EXPR_NUM:
         case EXPR_HEXNUM:
+        case EXPR_TRUEFALSE:
             return a->u.lval - b->u.lval;
         case EXPR_IDENTIFIER:
             return strcmp(a->u.sval, b->u.sval);
@@ -1957,6 +1958,12 @@ static void write_struct_expr(FILE *h, const expr_t *e, int brackets,
         case EXPR_HEXNUM:
             fprintf(h, "0x%lx", e->u.lval);
             break;
+        case EXPR_TRUEFALSE:
+            if (e->u.lval == 0)
+                fprintf(h, "FALSE");
+            else
+                fprintf(h, "TRUE");
+            break;
         case EXPR_IDENTIFIER:
         {
             const var_t *field;

tools/widl/widltypes.h

@@ -156,6 +156,7 @@ enum expr_type
     EXPR_AND,
     EXPR_OR,
     EXPR_COND,
+    EXPR_TRUEFALSE,
 };
 
 enum type_kind