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stdlib/String: if we can not get a contiguous data buffer out of NSString,

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don't call into CoreFoundation to perform UTF-8 transcoding.  CoreFoundation
can replace ill-formed sequences with a single byte, which is not good enough
to implement U+FFFD insertion.  Instead, use the same transcoding routine as
for contiguous buffer.

Pulled out the transcoding routine into a generic function that should be
specialized and simplified for the case when input is UnsafeArray; we should
not be losing efficiency here.

Fixes <rdar://problem/17297055> [unicode] println crashes when given string
with unpaired surrogate



Swift SVN r19157
This commit is contained in:
Dmitri Hrybenko
2014-06-25 13:24:15 +00:00
parent 90f578f047
commit 6bb6e1b0b4
8 changed files with 219 additions and 164 deletions
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11
stdlib/core/StringBridge.swift
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@@ -76,14 +76,3 @@ func _cocoaStringSubscriptNotInitialized(
_fatalError("_cocoaStringSubscript not initialized")
}
@public var _cocoaStringEncodeSomeUTF8: (
target: _StringCore, position: Int
) -> (_StringCore.IndexType, _StringCore.UTF8Chunk)
= _cocoaStringEncodeSomeUTF8NotInitialized
func _cocoaStringEncodeSomeUTF8NotInitialized(
target: _StringCore, position: Int
) -> (_StringCore.IndexType, _StringCore.UTF8Chunk) {
_fatalError("_cocoaStringEncodeSomeUTF8 not initialized")
}