Revert "Add gsutil 4.13 to telemetry/third_party"

tools/telemetry/third_party/gsutil/third_party/crcmod/docs/source/intro.rst

Index: tools/telemetry/third_party/gsutil/third_party/crcmod/docs/source/intro.rst
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-
-============
-Introduction
-============
-
-The software in this package is a Python module for generating objects that
-compute the Cyclic Redundancy Check (CRC).  It includes a (optional) C
-extension for fast calculation, as well as a pure Python implementation.
-
-There is no attempt in this package to explain how the CRC works.  There are a
-number of resources on the web that give a good explanation of the algorithms.
-Just do a Google search for "crc calculation" and browse till you find what you
-need.  Another resource can be found in chapter 20 of the book "Numerical
-Recipes in C" by Press et. al.
-
-This package allows the use of any 8, 16, 24, 32, or 64 bit CRC.  You can
-generate a Python function for the selected polynomial or an instance of the
-:class:`crcmod.Crc` class which provides the same interface as the
-:mod:`hashlib`, :mod:`md5` and :mod:`sha` modules from the Python standard
-library.  A :class:`crcmod.Crc` class instance can also generate C/C++ source
-code that can be used in another application.
-
-----------
-Guidelines
-----------
-
-Documentation is available here as well as from the doc strings.
-
-It is up to you to decide what polynomials to use in your application.  Some
-common CRC algorithms are predefined in :mod:`crcmod.predefined`.  If someone
-has not specified the polynomials to use, you will need to do some research to
-find one suitable for your application.  Examples are available in the unit
-test script :file:`test.py`.
-
-If you need to generate code for another language, I suggest you subclass the
-:class:`crcmod.Crc` class and replace the method
-:meth:`crcmod.Crc.generateCode`.  Use :meth:`crcmod.Crc.generateCode` as a
-model for the new version.
-
-------------
-Dependencies
-------------
-
-Python Version
-^^^^^^^^^^^^^^
-
-The package has separate code to support the 2.x and 3.x Python series.
-
-For the 2.x versions of Python, these versions have been tested:
-
-* 2.4
-* 2.5
-* 2.6
-* 2.7
-
-It may still work on earlier versions of Python 2.x, but these have not been
-recently tested.
-
-For the 3.x versions of Python, these versions have been tested:
-
-* 3.1
-
-Building C extension
-^^^^^^^^^^^^^^^^^^^^
-
-To build the C extension, the appropriate compiler tools for your platform must
-be installed. Refer to the Python documentation for building C extensions for
-details.
-
-------------
-Installation
-------------
-
-The :mod:`crcmod` package is installed using :mod:`distutils`.
-Run the following command::
-
-   python setup.py install
-
-If the extension module builds, it will be installed.  Otherwise, the
-installation will include the pure Python version.  This will run significantly
-slower than the extension module but will allow the package to be used.
-
-For Windows users who want to use the mingw32 compiler, run this command::
-
-    python setup.py build --compiler=mingw32 install
-
-For Python 3.x, the install process is the same but you need to use the 3.x
-interpreter.
-
-------------
-Unit Testing
-------------
-
-The :mod:`crcmod` package has a module :mod:`crcmod.test`, which contains
-unit tests for both :mod:`crcmod` and :mod:`crcmod.predefined`.
-
-When you first install :mod:`crcmod`, you should run the unit tests to make
-sure everything is installed properly.  The test script performs a number of
-tests including a comparison to the direct method which uses a class
-implementing polynomials over the integers mod 2.
-
-To run the unit tests on Python >=2.5::
-
-    python -m crcmod.test
-
-Alternatively, in the :file:`test` directory run::
-
-    python test_crcmod.py
-
----------------
-Code Generation
----------------
-
-The :mod:`crcmod` package is capable of generating C functions that can be
-compiled with a C or C++ compiler.  In the :file:`test` directory, there is an
-:file:`examples.py` script that demonstrates how to use the code generator.
-The result of this is written out to the file :file:`examples.c`.  The
-generated code was checked to make sure it compiles with the GCC compiler.
-
--------
-License
--------
-
-The :mod:`crcmod` package is released under the MIT license.  See the
-:file:`LICENSE` file for details.
-
-----------
-References
-----------
-
-.. seealso::
-
-   :func:`binascii.crc32` function from the :mod:`binascii` module
-      CRC-32 implementation
-   
-   :func:`zlib.crc32` function from the :mod:`zlib` module
-      CRC-32 implementation
-
-   Module :mod:`hashlib`
-      Secure hash and message digest algorithms.
-
-   Module :mod:`md5`
-      RSA's MD5 message digest algorithm.
-
-   Module :mod:`sha`
-      NIST's secure hash algorithm, SHA.
-
-   Module :mod:`hmac`
-      Keyed-hashing for message authentication.