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authorRich Felker <dalias@aerifal.cx>2018-08-28 19:22:13 -0400
committerRich Felker <dalias@aerifal.cx>2018-08-28 20:01:25 -0400
commitb152d575fdde1b4173afb4cade55f35b6b2e9128 (patch)
treecc94ef2a9e107e2bc4a741eb901462d2d5973b20 /configure
parentf66022dda8d18e6732626c7806f6c4d32023d574 (diff)
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set stream orientations in open_[w]memstream
fundamentally there is no good reason these functions need to set an
orientation (morally it should be possible to write a wchar_t[] memory
stream using byte functions, or a char[] memory stream using wide
functions), but it's a part of the specification that they do. aside
from being able to inspect the orientation with fwide, failure to set
the orientation in open_wmemstream is observable if the locale changes
between open_wmemstream and the first operation on the stream; this is
because the encoding rule (locale) for the stream is required to be
bound at the time the stream becomes wide-oriented.

for open_wmemstream, call fwide to avoid duplicating the logic for
binding the encoding rule. for open_memstream it suffices just to set
the mode field in the FILE struct.
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