+/* Optional extensions don't have the has_ field, as that would be redundant. */
+#define PB_OPTEXT_STATIC(tag, st, m, fd, ltype, ptr) \
+ {tag, PB_ATYPE_STATIC | PB_HTYPE_OPTIONAL | ltype, \
+ 0, \
+ 0, \
+ pb_membersize(st, m), 0, ptr}
+
+#define PB_OPTEXT_POINTER(tag, st, m, fd, ltype, ptr) \
+ PB_OPTIONAL_POINTER(tag, st, m, fd, ltype, ptr)
+
+#define PB_OPTEXT_CALLBACK(tag, st, m, fd, ltype, ptr) \
+ PB_OPTIONAL_CALLBACK(tag, st, m, fd, ltype, ptr)
+
+/* The mapping from protobuf types to LTYPEs is done using these macros. */
+#define PB_LTYPE_MAP_BOOL PB_LTYPE_VARINT
+#define PB_LTYPE_MAP_BYTES PB_LTYPE_BYTES
+#define PB_LTYPE_MAP_DOUBLE PB_LTYPE_FIXED64
+#define PB_LTYPE_MAP_ENUM PB_LTYPE_VARINT
+#define PB_LTYPE_MAP_FIXED32 PB_LTYPE_FIXED32
+#define PB_LTYPE_MAP_FIXED64 PB_LTYPE_FIXED64
+#define PB_LTYPE_MAP_FLOAT PB_LTYPE_FIXED32
+#define PB_LTYPE_MAP_INT32 PB_LTYPE_VARINT
+#define PB_LTYPE_MAP_INT64 PB_LTYPE_VARINT
+#define PB_LTYPE_MAP_MESSAGE PB_LTYPE_SUBMESSAGE
+#define PB_LTYPE_MAP_SFIXED32 PB_LTYPE_FIXED32
+#define PB_LTYPE_MAP_SFIXED64 PB_LTYPE_FIXED64
+#define PB_LTYPE_MAP_SINT32 PB_LTYPE_SVARINT
+#define PB_LTYPE_MAP_SINT64 PB_LTYPE_SVARINT
+#define PB_LTYPE_MAP_STRING PB_LTYPE_STRING
+#define PB_LTYPE_MAP_UINT32 PB_LTYPE_UVARINT
+#define PB_LTYPE_MAP_UINT64 PB_LTYPE_UVARINT
+#define PB_LTYPE_MAP_EXTENSION PB_LTYPE_EXTENSION
+
+/* This is the actual macro used in field descriptions.
+ * It takes these arguments:
+ * - Field tag number
+ * - Field type: BOOL, BYTES, DOUBLE, ENUM, FIXED32, FIXED64,
+ * FLOAT, INT32, INT64, MESSAGE, SFIXED32, SFIXED64
+ * SINT32, SINT64, STRING, UINT32, UINT64 or EXTENSION
+ * - Field rules: REQUIRED, OPTIONAL or REPEATED
+ * - Allocation: STATIC or CALLBACK
+ * - Placement: FIRST or OTHER, depending on if this is the first field in structure.
+ * - Message name
+ * - Field name
+ * - Previous field name (or field name again for first field)
+ * - Pointer to default value or submsg fields.
+ */
+
+#define PB_FIELD(tag, type, rules, allocation, placement, message, field, prevfield, ptr) \
+ PB_ ## rules ## _ ## allocation(tag, message, field, \
+ PB_DATAOFFSET_ ## placement(message, field, prevfield), \
+ PB_LTYPE_MAP_ ## type, ptr)
+
+
+/* These macros are used for giving out error messages.
+ * They are mostly a debugging aid; the main error information
+ * is the true/false return value from functions.
+ * Some code space can be saved by disabling the error
+ * messages if not used.
+ */
+#ifdef PB_NO_ERRMSG
+#define PB_RETURN_ERROR(stream,msg) \
+ do {\
+ PB_UNUSED(stream); \
+ return false; \
+ } while(0)
+#define PB_GET_ERROR(stream) "(errmsg disabled)"
+#else
+#define PB_RETURN_ERROR(stream,msg) \
+ do {\
+ if ((stream)->errmsg == NULL) \
+ (stream)->errmsg = (msg); \
+ return false; \
+ } while(0)
+#define PB_GET_ERROR(stream) ((stream)->errmsg ? (stream)->errmsg : "(none)")
+#endif
+
+#endif