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merge from 3.2.

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Senthil Kumaran 2011-07-17 17:31:51 +08:00
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@ -257,10 +257,11 @@ not contain whitespace though.
For the ``'s'`` format character, the count is interpreted as the size of the For the ``'s'`` format character, the count is interpreted as the size of the
string, not a repeat count like for the other format characters; for example, string, not a repeat count like for the other format characters; for example,
``'10s'`` means a single 10-byte string, while ``'10c'`` means 10 characters. ``'10s'`` means a single 10-byte string, while ``'10c'`` means 10 characters.
For packing, the string is truncated or padded with null bytes as appropriate to If a count is not given, it defaults to 1. For packing, the string is
make it fit. For unpacking, the resulting string always has exactly the truncated or padded with null bytes as appropriate to make it fit. For
specified number of bytes. As a special case, ``'0s'`` means a single, empty unpacking, the resulting string always has exactly the specified number of
string (while ``'0c'`` means 0 characters). bytes. As a special case, ``'0s'`` means a single, empty string (while
``'0c'`` means 0 characters).
The ``'p'`` format character encodes a "Pascal string", meaning a short The ``'p'`` format character encodes a "Pascal string", meaning a short
variable-length string stored in a *fixed number of bytes*, given by the count. variable-length string stored in a *fixed number of bytes*, given by the count.