gecko-dev/dom/encoding/EncodingUtils.cpp

47 lines
1.4 KiB
C++

/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "mozilla/dom/EncodingUtils.h"
#include "mozilla/Util.h" // ArrayLength
#include "nsUConvPropertySearch.h"
namespace mozilla {
namespace dom {
static const char* labelsEncodings[][3] = {
#include "labelsencodings.properties.h"
};
bool
EncodingUtils::FindEncodingForLabel(const nsACString& aLabel,
nsACString& aOutEncoding)
{
// Save aLabel first because it may refer the same string as aOutEncoding.
nsCString label(aLabel);
EncodingUtils::TrimSpaceCharacters(label);
if (label.IsEmpty()) {
aOutEncoding.Truncate();
return false;
}
ToLowerCase(label);
return NS_SUCCEEDED(nsUConvPropertySearch::SearchPropertyValue(
labelsEncodings, ArrayLength(labelsEncodings), label, aOutEncoding));
}
bool
EncodingUtils::IsAsciiCompatible(const nsACString& aPreferredName)
{
return !(aPreferredName.LowerCaseEqualsLiteral("utf-16") ||
aPreferredName.LowerCaseEqualsLiteral("utf-16be") ||
aPreferredName.LowerCaseEqualsLiteral("utf-16le") ||
aPreferredName.LowerCaseEqualsLiteral("utf-7") ||
aPreferredName.LowerCaseEqualsLiteral("x-imap4-modified-utf7"));
}
} // namespace dom
} // namespace mozilla