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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* 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 "nsUnicodeNormalizer.h"
#include "ICUUtils.h"
#include "unicode/unorm2.h"
#include "unicode/utext.h"
NS_IMPL_ISUPPORTS(nsUnicodeNormalizer, nsIUnicodeNormalizer)
nsUnicodeNormalizer::nsUnicodeNormalizer()
{
}
nsUnicodeNormalizer::~nsUnicodeNormalizer()
{
}
static nsresult
DoNormalization(const UNormalizer2* aNorm, const nsAString& aSrc,
nsAString& aDest)
{
UErrorCode errorCode = U_ZERO_ERROR;
const int32_t length = aSrc.Length();
const UChar* src = reinterpret_cast<const UChar*>(aSrc.BeginReading());
// Initial guess for a capacity that is likely to be enough for most cases.
int32_t capacity = length + (length >> 8) + 8;
do {
aDest.SetLength(capacity);
UChar* dest = reinterpret_cast<UChar*>(aDest.BeginWriting());
int32_t len = unorm2_normalize(aNorm, src, aSrc.Length(), dest, capacity,
&errorCode);
if (U_SUCCESS(errorCode)) {
aDest.SetLength(len);
break;
}
if (errorCode == U_BUFFER_OVERFLOW_ERROR) {
// Buffer wasn't big enough; adjust to the reported size and try again.
capacity = len;
errorCode = U_ZERO_ERROR;
continue;
}
} while (false);
return ICUUtils::UErrorToNsResult(errorCode);
}
nsresult
nsUnicodeNormalizer::NormalizeUnicodeNFD(const nsAString& aSrc,
nsAString& aDest)
{
// The unorm2_getNF*Instance functions return static singletons that should
// not be deleted, so we just get them once on first use.
static UErrorCode errorCode = U_ZERO_ERROR;
static const UNormalizer2* norm = unorm2_getNFDInstance(&errorCode);
if (U_SUCCESS(errorCode)) {
return DoNormalization(norm, aSrc, aDest);
}
return ICUUtils::UErrorToNsResult(errorCode);
}
nsresult
nsUnicodeNormalizer::NormalizeUnicodeNFC(const nsAString& aSrc,
nsAString& aDest)
{
static UErrorCode errorCode = U_ZERO_ERROR;
static const UNormalizer2* norm = unorm2_getNFCInstance(&errorCode);
if (U_SUCCESS(errorCode)) {
return DoNormalization(norm, aSrc, aDest);
}
return ICUUtils::UErrorToNsResult(errorCode);
}
nsresult
nsUnicodeNormalizer::NormalizeUnicodeNFKD(const nsAString& aSrc,
nsAString& aDest)
{
static UErrorCode errorCode = U_ZERO_ERROR;
static const UNormalizer2* norm = unorm2_getNFKDInstance(&errorCode);
if (U_SUCCESS(errorCode)) {
return DoNormalization(norm, aSrc, aDest);
}
return ICUUtils::UErrorToNsResult(errorCode);
}
nsresult
nsUnicodeNormalizer::NormalizeUnicodeNFKC(const nsAString& aSrc,
nsAString& aDest)
{
static UErrorCode errorCode = U_ZERO_ERROR;
static const UNormalizer2* norm = unorm2_getNFKCInstance(&errorCode);
if (U_SUCCESS(errorCode)) {
return DoNormalization(norm, aSrc, aDest);
}
return ICUUtils::UErrorToNsResult(errorCode);
}
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