| # Protocol Buffers - Google's data interchange format |
| # Copyright 2008 Google Inc. All rights reserved. |
| # https://developers.google.com/protocol-buffers/ |
| # |
| # Redistribution and use in source and binary forms, with or without |
| # modification, are permitted provided that the following conditions are |
| # met: |
| # |
| # * Redistributions of source code must retain the above copyright |
| # notice, this list of conditions and the following disclaimer. |
| # * Redistributions in binary form must reproduce the above |
| # copyright notice, this list of conditions and the following disclaimer |
| # in the documentation and/or other materials provided with the |
| # distribution. |
| # * Neither the name of Google Inc. nor the names of its |
| # contributors may be used to endorse or promote products derived from |
| # this software without specific prior written permission. |
| # |
| # THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| # "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| # LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR |
| # A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| # OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| # SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT |
| # LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, |
| # DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY |
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| # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| |
| TAG_TYPE_BITS = 3 # Number of bits used to hold type info in a proto tag. |
| |
| WIRETYPE_VARINT = 0 |
| WIRETYPE_FIXED64 = 1 |
| WIRETYPE_LENGTH_DELIMITED = 2 |
| WIRETYPE_START_GROUP = 3 |
| WIRETYPE_END_GROUP = 4 |
| WIRETYPE_FIXED32 = 5 |
| _WIRETYPE_MAX = 5 |
| |
| def PackTag(field_number, wire_type): |
| """Returns an unsigned 32-bit integer that encodes the field number and |
| wire type information in standard protocol message wire format. |
| |
| Args: |
| field_number: Expected to be an integer in the range [1, 1 << 29) |
| wire_type: One of the WIRETYPE_* constants. |
| """ |
| if not 0 <= wire_type <= _WIRETYPE_MAX: |
| raise RuntimeError('Unknown wire type: %d' % wire_type) |
| return (field_number << TAG_TYPE_BITS) | wire_type |
| |
