+static bool checkreturn pb_dec_varint(pb_istream_t *stream, const pb_field_t *field, void *dest)
+{
+ uint64_t value;
+ int64_t svalue;
+ int64_t clamped;
+ if (!pb_decode_varint(stream, &value))
+ return false;
+
+ /* See issue 97: Google's C++ protobuf allows negative varint values to
+ * be cast as int32_t, instead of the int64_t that should be used when
+ * encoding. Previous nanopb versions had a bug in encoding. In order to
+ * not break decoding of such messages, we cast <=32 bit fields to
+ * int32_t first to get the sign correct.
+ */
+ if (field->data_size == 8)
+ svalue = (int64_t)value;
+ else
+ svalue = (int32_t)value;
+
+ switch (field->data_size)
+ {
+ case 1: clamped = *(int8_t*)dest = (int8_t)svalue; break;
+ case 2: clamped = *(int16_t*)dest = (int16_t)svalue; break;
+ case 4: clamped = *(int32_t*)dest = (int32_t)svalue; break;
+ case 8: clamped = *(int64_t*)dest = svalue; break;
+ default: PB_RETURN_ERROR(stream, "invalid data_size");
+ }
+
+ if (clamped != svalue)
+ PB_RETURN_ERROR(stream, "integer too large");
+
+ return true;
+}
+
+static bool checkreturn pb_dec_uvarint(pb_istream_t *stream, const pb_field_t *field, void *dest)
+{
+ uint64_t value, clamped;
+ if (!pb_decode_varint(stream, &value))
+ return false;
+
+ switch (field->data_size)
+ {
+ case 1: clamped = *(uint8_t*)dest = (uint8_t)value; break;
+ case 2: clamped = *(uint16_t*)dest = (uint16_t)value; break;
+ case 4: clamped = *(uint32_t*)dest = (uint32_t)value; break;
+ case 8: clamped = *(uint64_t*)dest = value; break;
+ default: PB_RETURN_ERROR(stream, "invalid data_size");
+ }
+
+ if (clamped != value)
+ PB_RETURN_ERROR(stream, "integer too large");
+
+ return true;
+}
+
+static bool checkreturn pb_dec_svarint(pb_istream_t *stream, const pb_field_t *field, void *dest)
+{
+ int64_t value, clamped;
+ if (!pb_decode_svarint(stream, &value))
+ return false;
+
+ switch (field->data_size)
+ {
+ case 1: clamped = *(int8_t*)dest = (int8_t)value; break;
+ case 2: clamped = *(int16_t*)dest = (int16_t)value; break;
+ case 4: clamped = *(int32_t*)dest = (int32_t)value; break;
+ case 8: clamped = *(int64_t*)dest = value; break;
+ default: PB_RETURN_ERROR(stream, "invalid data_size");
+ }
+
+ if (clamped != value)
+ PB_RETURN_ERROR(stream, "integer too large");
+
+ return true;
+}
+
+static bool checkreturn pb_dec_fixed32(pb_istream_t *stream, const pb_field_t *field, void *dest)
+{
+ PB_UNUSED(field);
+ return pb_decode_fixed32(stream, dest);
+}
+
+static bool checkreturn pb_dec_fixed64(pb_istream_t *stream, const pb_field_t *field, void *dest)
+{
+ PB_UNUSED(field);
+ return pb_decode_fixed64(stream, dest);
+}
+
+static bool checkreturn pb_dec_bytes(pb_istream_t *stream, const pb_field_t *field, void *dest)