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Refactor UTF-7 encoding detection #18384

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Refactor UTF-7 encoding detection #18384

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ffe4b12
Use `WarnIfObsolete` in `EncodingConversion`
xtqqczze Oct 25, 2022
e534ca6
Retarget documentation link
xtqqczze Oct 25, 2022
f3b2fd4
Extract to `WarnIfObsolete`
xtqqczze Oct 25, 2022
76c3d3b
Refactor `WarnIfObsolete`
xtqqczze Oct 25, 2022
b1624fd
Reword comments
xtqqczze Oct 28, 2022
8441e0f
Rename `WarnIfObsolete`
xtqqczze Nov 5, 2022
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Extract to WarnIfObsolete
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@xtqqczze
xtqqczze committed Oct 25, 2022
commit f3b2fd4d506e750e0b1f7d372b2acb31841b501c
19 changes: 13 additions & 6 deletions src/System.Management.Automation/namespaces/FileSystemProvider.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -7656,15 +7656,22 @@ public Encoding Encoding

set
{
// Check for UTF-7 by checking for code page 65000
// See: https://docs.microsoft.com/dotnet/core/compatibility/core-libraries/5.0/utf-7-code-paths-obsolete
if (value != null && value.CodePage == 65000)
{
_provider.WriteWarning(PathUtilsStrings.Utf7EncodingObsolete);
}
WarnIfObsolete(value);
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_encoding = value;
// If an encoding was explicitly set, be sure to capture that.
WasStreamTypeSpecified = true;

void WarnIfObsolete(Encoding value)
{
const int CodePageUtf7 = 65000;

// Compare against the the well-known UTF-7 code page, see:
// https://docs.microsoft.com/dotnet/core/compatibility/core-libraries/5.0/utf-7-code-paths-obsolete
if (value is { CodePage: CodePageUtf7 })
{
_provider.WriteWarning(PathUtilsStrings.Utf7EncodingObsolete);
}
}
}
}

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