Avoid uninitialized variable warnings in gmp

Author: nikic

ext/gmp/gmp.c

@@ -828,21 +828,20 @@ static void gmp_cmp(zval *return_value, zval *a_arg, zval *b_arg) /* {{{ */
 static inline void gmp_zval_binary_ui_op(zval *return_value, zval *a_arg, zval *b_arg, gmp_binary_op_t gmp_op, gmp_binary_ui_op_t gmp_ui_op, int check_b_zero)
 {
 	mpz_ptr gmpnum_a, gmpnum_b, gmpnum_result;
-	int use_ui = 0;
 	gmp_temp_t temp_a, temp_b;
 
 	FETCH_GMP_ZVAL(gmpnum_a, a_arg, temp_a);
 
 	if (gmp_ui_op && Z_TYPE_P(b_arg) == IS_LONG && Z_LVAL_P(b_arg) >= 0) {
-		use_ui = 1;
+		gmpnum_b = NULL;
 		temp_b.is_used = 0;
 	} else {
 		FETCH_GMP_ZVAL_DEP(gmpnum_b, b_arg, temp_b, temp_a);
 	}
 
 	if (check_b_zero) {
 		int b_is_zero = 0;
-		if (use_ui) {
+		if (!gmpnum_b) {
 			b_is_zero = (Z_LVAL_P(b_arg) == 0);
 		} else {
 			b_is_zero = !mpz_cmp_ui(gmpnum_b, 0);
@@ -858,7 +857,7 @@ static inline void gmp_zval_binary_ui_op(zval *return_value, zval *a_arg, zval *
 
 	INIT_GMP_RETVAL(gmpnum_result);
 
-	if (use_ui) {
+	if (!gmpnum_b) {
 		gmp_ui_op(gmpnum_result, gmpnum_a, (gmp_ulong) Z_LVAL_P(b_arg));
 	} else {
 		gmp_op(gmpnum_result, gmpnum_a, gmpnum_b);
@@ -875,23 +874,21 @@ static inline void gmp_zval_binary_ui_op(zval *return_value, zval *a_arg, zval *
 static inline void gmp_zval_binary_ui_op2(zval *return_value, zval *a_arg, zval *b_arg, gmp_binary_op2_t gmp_op, gmp_binary_ui_op2_t gmp_ui_op, int check_b_zero)
 {
 	mpz_ptr gmpnum_a, gmpnum_b, gmpnum_result1, gmpnum_result2;
-	int use_ui = 0;
 	gmp_temp_t temp_a, temp_b;
 	zval result1, result2;
 
 	FETCH_GMP_ZVAL(gmpnum_a, a_arg, temp_a);
 
 	if (gmp_ui_op && Z_TYPE_P(b_arg) == IS_LONG && Z_LVAL_P(b_arg) >= 0) {
-		/* use _ui function */
-		use_ui = 1;
+		gmpnum_b = NULL;
 		temp_b.is_used = 0;
 	} else {
 		FETCH_GMP_ZVAL_DEP(gmpnum_b, b_arg, temp_b, temp_a);
 	}
 
 	if (check_b_zero) {
 		int b_is_zero = 0;
-		if (use_ui) {
+		if (!gmpnum_b) {
 			b_is_zero = (Z_LVAL_P(b_arg) == 0);
 		} else {
 			b_is_zero = !mpz_cmp_ui(gmpnum_b, 0);
@@ -912,7 +909,7 @@ static inline void gmp_zval_binary_ui_op2(zval *return_value, zval *a_arg, zval
 	add_next_index_zval(return_value, &result1);
 	add_next_index_zval(return_value, &result2);
 
-	if (use_ui) {
+	if (!gmpnum_b) {
 		gmp_ui_op(gmpnum_result1, gmpnum_result2, gmpnum_a, (gmp_ulong) Z_LVAL_P(b_arg));
 	} else {
 		gmp_op(gmpnum_result1, gmpnum_result2, gmpnum_a, gmpnum_b);