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fixes bug 335957 "Provide method to resize-and-get mutable string data" r=dbaron

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git-svn-id: svn://10.0.0.236/trunk@201151 18797224-902f-48f8-a5cc-f745e15eee43
This commit is contained in:
darin%meer.net
2006-06-28 22:11:39 +00:00
parent cf84a5cda4
commit d49c6a4307
4 changed files with 149 additions and 55 deletions
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26
mozilla/xpcom/string/src/nsTSubstring.cpp
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@@ -272,16 +272,26 @@ nsTSubstring_CharT::Capacity() const
return capacity;
}
void
nsTSubstring_CharT::EnsureMutable()
PRBool
nsTSubstring_CharT::EnsureMutable( size_type newLen )
{
if (mFlags & (F_FIXED | F_OWNED))
return;
if ((mFlags & F_SHARED) && !nsStringBuffer::FromData(mData)->IsReadonly())
return;
if (newLen == size_type(-1) || newLen == mLength)
{
if (mFlags & (F_FIXED | F_OWNED))
return PR_TRUE;
if ((mFlags & F_SHARED) && !nsStringBuffer::FromData(mData)->IsReadonly())
return PR_TRUE;
// promote to a shared string buffer
Assign(string_type(mData, mLength));
// promote to a shared string buffer
char_type* prevData = mData;
Assign(string_type(mData, mLength));
return mData != prevData;
}
else
{
SetLength(newLen);
return mLength == newLen;
}
}
// ---------------------------------------------------------------------------