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Date: Sun, 1 Jun 2025 10:10:28 -0700 (PDT)
X-X-Sender: jeremyd AT resin DOT csoft DOT net
To: cygwin AT cygwin DOT com
Subject: CCP_WIN_A_TO_POSIX and encodings
Message-ID: <b534c3e4-a625-36d5-7090-c69f4a496103@jdrake.com>
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From: Jeremy Drake via Cygwin <cygwin AT cygwin DOT com>
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Sender: "Cygwin" <cygwin-bounces~archive-cygwin=delorie DOT com AT cygwin DOT com>

In https://github.com/rust-lang/rust/pull/141864 I was going to say that
passing an already-posix path through cygwin_conv_path(CPP_WIN_A_TO_POSIX,
...) was unsafe because Windows ANSI file paths are either CP_ACP or
CP_OEMCP, while Cygwin POSIX path encodings are based on the C locale
encoding (usually UTF-8).  However, when I looked at the code I didn't see
any encoding conversion in the CCP_WIN_A_TO_POSIX path.  Is my
understanding wrong?  Is there a conversion going on somewhere I'm not
seeing?

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