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https://github.com/boykopovar/AnyPS5.git
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KernelPanicNT
f01d777388
u_strCompareIter compares two UCharIterator texts in code unit or code point order as ICU 78.1's ustring.cpp does, driving the guest iterators through their move, next, current and previous callbacks in ICU's order. u_getUnicodeVersion reports Unicode 17.0, the data version of ICU 78.1. A null callback that ICU would call throws std::invalid_argument, and the final difference wraps instead of overflowing. The debt entry records that neither export was compared with a console.
63 lines
1.8 KiB
C++
63 lines
1.8 KiB
C++
#include "prx/libSceIcu/libSceIcu.hpp"
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#include <cstdint>
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#include <stdexcept>
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namespace {
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constexpr std::int32_t Sentinel = -1;
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bool IsLead(std::int32_t unit) {
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return (static_cast<std::uint32_t>(unit) & 0xfffffc00u) == 0xd800u;
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}
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bool IsTrail(std::int32_t unit) {
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return (static_cast<std::uint32_t>(unit) & 0xfffffc00u) == 0xdc00u;
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}
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template<typename TCallback>
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TCallback Require(TCallback callback) {
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if (!callback) throw std::invalid_argument("u_strCompareIter: null iterator callback");
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return callback;
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}
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std::int32_t Next(UCharIterator* iterator) {
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return Require(iterator->next)(iterator);
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}
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bool InPair(UCharIterator* iterator, std::int32_t unit) {
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if (unit <= 0xdbff) return IsTrail(Require(iterator->current)(iterator));
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if (!IsTrail(unit)) return false;
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const auto previous = Require(iterator->previous);
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previous(iterator);
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return IsLead(Require(iterator->previous)(iterator));
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}
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std::int32_t Order(UCharIterator* iterator, std::int32_t unit) {
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return InPair(iterator, unit) ? unit : unit - 0x2800;
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}
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}
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extern "C" {
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std::int32_t APS5_VABI u_strCompareIter_nid_postfix(UCharIterator* first, UCharIterator* second, std::uint8_t codePointOrder) {
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if (!first || !second || first == second) return 0;
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Require(first->move)(first, 0, UITER_START);
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Require(second->move)(second, 0, UITER_START);
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std::int32_t left;
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std::int32_t right;
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for (;;) {
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left = Next(first);
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right = Next(second);
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if (left != right) break;
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if (left == Sentinel) return 0;
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}
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if (left >= 0xd800 && right >= 0xd800 && codePointOrder) {
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left = Order(first, left);
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right = Order(second, right);
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}
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return static_cast<std::int32_t>(static_cast<std::uint32_t>(left) - static_cast<std::uint32_t>(right));
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}
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}
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