-#define        __ASN_E_cbc(buf, size)  (cb((buf), (size), app_key) < 0)
-#define        _ASN_E_CALLBACK(foo)    do {                                    \
-               if(foo) goto cb_failed;                                 \
-       } while(0)
-#define        _ASN_CALLBACK(buf, size)                                        \
-       _ASN_E_CALLBACK(__ASN_E_cbc(buf, size))
-#define        _ASN_CALLBACK2(buf1, size1, buf2, size2)                        \
-       _ASN_E_CALLBACK(__ASN_E_cbc(buf1, size1) || __ASN_E_cbc(buf2, size2))
-#define        _ASN_CALLBACK3(buf1, size1, buf2, size2, buf3, size3)           \
-       _ASN_E_CALLBACK(__ASN_E_cbc(buf1, size1)                        \
-               || __ASN_E_cbc(buf2, size2)                             \
-               || __ASN_E_cbc(buf3, size3))
-
-#define        _i_ASN_TEXT_INDENT(nl, level) do {                              \
-       int __level = (level);                                          \
-       int __nl = ((nl) != 0);                                         \
-       int __i;                                                        \
-       if(__nl) _ASN_CALLBACK("\n", 1);                                \
-       for(__i = 0; __i < __level; __i++)                              \
-               _ASN_CALLBACK("    ", 4);                               \
-       er.encoded += __nl + 4 * __level;                               \
-} while(0)
-
-#define        _i_INDENT(nl)   do {                                            \
-       int __i;                                                        \
-       if((nl) && cb("\n", 1, app_key) < 0) return -1;                 \
-       for(__i = 0; __i < ilevel; __i++)                               \
-               if(cb("    ", 4, app_key) < 0) return -1;               \
-} while(0)
+#define ASN__E_cbc(buf, size) (cb((buf), (size), app_key) < 0)
+#define ASN__E_CALLBACK(size, foo) \
+    do {                           \
+        if(foo) goto cb_failed;    \
+        er.encoded += (size);      \
+    } while(0)
+#define ASN__CALLBACK(buf, size) ASN__E_CALLBACK(size, ASN__E_cbc(buf, size))
+#define ASN__CALLBACK2(buf1, size1, buf2, size2) \
+    ASN__E_CALLBACK((size1) + (size2),           \
+                    ASN__E_cbc(buf1, size1) || ASN__E_cbc(buf2, size2))
+#define ASN__CALLBACK3(buf1, size1, buf2, size2, buf3, size3)          \
+    ASN__E_CALLBACK((size1) + (size2) + (size3),                       \
+                    ASN__E_cbc(buf1, size1) || ASN__E_cbc(buf2, size2) \
+                        || ASN__E_cbc(buf3, size3))
+
+#define ASN__TEXT_INDENT(nl, level)                                          \
+    do {                                                                     \
+        int tmp_level = (level);                                             \
+        int tmp_nl = ((nl) != 0);                                            \
+        int tmp_i;                                                           \
+        if(tmp_nl) ASN__CALLBACK("\n", 1);                                   \
+        if(tmp_level < 0) tmp_level = 0;                                     \
+        for(tmp_i = 0; tmp_i < tmp_level; tmp_i++) ASN__CALLBACK("    ", 4); \
+    } while(0)
+
+#define        _i_INDENT(nl)   do {                        \
+        int tmp_i;                                  \
+        if((nl) && cb("\n", 1, app_key) < 0)        \
+            return -1;                              \
+        for(tmp_i = 0; tmp_i < ilevel; tmp_i++)     \
+            if(cb("    ", 4, app_key) < 0)          \
+                return -1;                          \
+    } while(0)