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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* 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 "nsString.h"
#include "plstr.h"
template <typename T>
int NS_FASTCALL Compare(const mozilla::detail::nsTStringRepr<T>& aLhs,
const mozilla::detail::nsTStringRepr<T>& aRhs,
const nsTStringComparator<T> comp) {
typedef typename nsTSubstring<T>::size_type size_type;
typedef typename nsTSubstring<T>::const_iterator const_iterator;
if (&aLhs == &aRhs) {
return 0;
}
const_iterator leftIter, rightIter;
aLhs.BeginReading(leftIter);
aRhs.BeginReading(rightIter);
size_type lLength = aLhs.Length();
size_type rLength = aRhs.Length();
size_type lengthToCompare = XPCOM_MIN(lLength, rLength);
int result;
if ((result = comp(leftIter.get(), rightIter.get(), lengthToCompare,
lengthToCompare)) == 0) {
if (lLength < rLength) {
result = -1;
} else if (rLength < lLength) {
result = 1;
} else {
result = 0;
}
}
return result;
}
template int NS_FASTCALL Compare<char>(
mozilla::detail::nsTStringRepr<char> const&,
mozilla::detail::nsTStringRepr<char> const&, nsTStringComparator<char>);
template int NS_FASTCALL
Compare<char16_t>(mozilla::detail::nsTStringRepr<char16_t> const&,
mozilla::detail::nsTStringRepr<char16_t> const&,
nsTStringComparator<char16_t>);
template <typename T>
int nsTDefaultStringComparator(const T* aLhs, const T* aRhs, size_t aLLength,
size_t aRLength) {
return aLLength == aRLength ? nsCharTraits<T>::compare(aLhs, aRhs, aLLength)
: (aLLength > aRLength) ? 1
: -1;
}
template int nsTDefaultStringComparator(const char*, const char*, size_t,
size_t);
template int nsTDefaultStringComparator(const char16_t*, const char16_t*,
size_t, size_t);
int nsCaseInsensitiveCStringComparator(const char* aLhs, const char* aRhs,
size_t aLhsLength, size_t aRhsLength) {
#if defined(LIBFUZZER) && defined(LINUX)
// Make sure libFuzzer can see this string compare by calling the POSIX
// native function which is intercepted. We also call this if the lengths
// don't match so libFuzzer can at least see a partial string, but we throw
// away the result afterwards again.
int32_t result =
int32_t(strncasecmp(aLhs, aRhs, std::min(aLhsLength, aRhsLength)));
if (aLhsLength != aRhsLength) {
return (aLhsLength > aRhsLength) ? 1 : -1;
}
#else
if (aLhsLength != aRhsLength) {
return (aLhsLength > aRhsLength) ? 1 : -1;
}
int32_t result = int32_t(PL_strncasecmp(aLhs, aRhs, aLhsLength));
#endif
// Egads. PL_strncasecmp is returning *very* negative numbers.
// Some folks expect -1,0,1, so let's temper its enthusiasm.
if (result < 0) {
result = -1;
}
return result;
}
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