+/* Encode a field with static allocation, i.e. one whose data is stored
+ * in the structure itself. */
+static bool checkreturn encode_static_field(pb_ostream_t *stream,
+ const pb_field_t *field, const void *pData)
+{
+ pb_encoder_t func;
+ const void *pSize;
+ bool dummy = true;
+
+ func = PB_ENCODERS[PB_LTYPE(field->type)];
+
+ if (field->size_offset)
+ pSize = (const char*)pData + field->size_offset;
+ else
+ pSize = &dummy;
+
+ switch (PB_HTYPE(field->type))
+ {
+ case PB_HTYPE_REQUIRED:
+ if (!pb_encode_tag_for_field(stream, field))
+ return false;
+ if (!func(stream, field, pData))
+ return false;
+ break;
+
+ case PB_HTYPE_OPTIONAL:
+ if (*(const bool*)pSize)
+ {
+ if (!pb_encode_tag_for_field(stream, field))
+ return false;
+
+ if (!func(stream, field, pData))
+ return false;
+ }
+ break;
+
+ case PB_HTYPE_REPEATED:
+ if (!encode_array(stream, field, pData, *(const size_t*)pSize, func))
+ return false;
+ break;
+
+ default:
+ PB_RETURN_ERROR(stream, "invalid field type");
+ }
+
+ return true;
+}
+
+/* Encode a field with callback semantics. This means that a user function is
+ * called to provide and encode the actual data. */
+static bool checkreturn encode_callback_field(pb_ostream_t *stream,
+ const pb_field_t *field, const void *pData)
+{
+ const pb_callback_t *callback = (const pb_callback_t*)pData;
+
+#ifdef PB_OLD_CALLBACK_STYLE
+ const void *arg = callback->arg;
+#else
+ void * const *arg = &(callback->arg);
+#endif
+
+ if (callback->funcs.encode != NULL)
+ {
+ if (!callback->funcs.encode(stream, field, arg))
+ PB_RETURN_ERROR(stream, "callback error");
+ }
+ return true;
+}
+
+/* Encode a single field of any callback or static type. */
+static bool checkreturn encode_field(pb_ostream_t *stream,
+ const pb_field_t *field, const void *pData)
+{
+ switch (PB_ATYPE(field->type))
+ {
+ case PB_ATYPE_STATIC:
+ return encode_static_field(stream, field, pData);
+
+ case PB_ATYPE_CALLBACK:
+ return encode_callback_field(stream, field, pData);
+
+ default:
+ PB_RETURN_ERROR(stream, "invalid field type");
+ }
+}
+
+/* Default handler for extension fields. Expects to have a pb_field_t
+ * pointer in the extension->type->arg field. */
+static bool checkreturn default_extension_encoder(pb_ostream_t *stream,
+ const pb_extension_t *extension)
+{
+ const pb_field_t *field = (const pb_field_t*)extension->type->arg;
+ return encode_field(stream, field, extension->dest);
+}
+
+/* Walk through all the registered extensions and give them a chance
+ * to encode themselves. */
+static bool checkreturn encode_extension_field(pb_ostream_t *stream,
+ const pb_field_t *field, const void *pData)
+{
+ const pb_extension_t *extension = *(const pb_extension_t* const *)pData;
+ UNUSED(field);
+
+ while (extension)
+ {
+ bool status;
+ if (extension->type->encode)
+ status = extension->type->encode(stream, extension);
+ else
+ status = default_extension_encoder(stream, extension);
+
+ if (!status)
+ return false;
+
+ extension = extension->next;
+ }
+
+ return true;
+}
+
+/*********************
+ * Encode all fields *
+ *********************/
+