mirror of
https://github.com/boykopovar/AnyPS5.git
synced 2026-11-08 13:50:20 +00:00
MarcZX10
c2e1096832
Compare two UTF-16 strings in code unit or code point order following ICU 78.1 ustring.cpp. Two negative lengths compare as NUL-terminated strings and return the difference of the first differing units; otherwise the strings are compared over the shorter length and equal prefixes order by length as -1, 0 or 1. In code point order a surrogate that is part of a pair keeps its value and any other unit at or above U+D800 is lowered by 0x2800 so supplementary characters sort after the BMP. A null pointer or a length below -1 returns 0. The sceIcuUnknown stub with this NID is removed.
59 lines
2.1 KiB
C++
59 lines
2.1 KiB
C++
#include "prx/libSceIcu/libSceIcu.hpp"
|
|
#include "prx/libSceIcu/Status.hpp"
|
|
#include <cstdint>
|
|
|
|
namespace {
|
|
|
|
bool Lead(std::int32_t unit) { return unit >= 0xd800 && unit <= 0xdbff; }
|
|
bool Trail(std::int32_t unit) { return unit >= 0xdc00 && unit <= 0xdfff; }
|
|
|
|
std::int64_t Measure(const char16_t* text) {
|
|
std::int64_t length = 0;
|
|
while (text[length] != 0) ++length;
|
|
return length;
|
|
}
|
|
|
|
std::int32_t CodePointOrder(const char16_t* text, std::int64_t index, std::int64_t length) {
|
|
std::int32_t unit = text[index];
|
|
const bool pair = (Lead(unit) && (length < 0 || index + 1 < length) && Trail(text[index + 1])) ||
|
|
(Trail(unit) && index > 0 && Lead(text[index - 1]));
|
|
return pair ? unit : unit - 0x2800;
|
|
}
|
|
|
|
}
|
|
|
|
extern "C" {
|
|
|
|
std::int32_t APS5_VABI u_strCompare_nid_postfix(const char16_t* first, std::int32_t firstLength, const char16_t* second,
|
|
std::int32_t secondLength, std::int8_t codePointOrder) {
|
|
if (!first || firstLength < -1 || !second || secondLength < -1) return 0;
|
|
const bool terminated = firstLength < 0 && secondLength < 0;
|
|
std::int64_t limit1 = firstLength;
|
|
std::int64_t limit2 = secondLength;
|
|
std::int32_t equalResult = 0;
|
|
std::int64_t index = 0;
|
|
if (terminated) {
|
|
if (first == second) return 0;
|
|
for (; first[index] == second[index]; ++index) {
|
|
if (first[index] == 0) return 0;
|
|
}
|
|
} else {
|
|
if (limit1 < 0) limit1 = Measure(first);
|
|
if (limit2 < 0) limit2 = Measure(second);
|
|
const auto common = limit1 < limit2 ? limit1 : limit2;
|
|
equalResult = limit1 < limit2 ? -1 : limit1 > limit2 ? 1 : 0;
|
|
if (first == second) return equalResult;
|
|
for (; index < common && first[index] == second[index]; ++index) {}
|
|
if (index == common) return equalResult;
|
|
}
|
|
std::int32_t unit1 = first[index];
|
|
std::int32_t unit2 = second[index];
|
|
if (unit1 >= 0xd800 && unit2 >= 0xd800 && codePointOrder) {
|
|
unit1 = CodePointOrder(first, index, terminated ? -1 : limit1);
|
|
unit2 = CodePointOrder(second, index, terminated ? -1 : limit2);
|
|
}
|
|
return unit1 - unit2;
|
|
}
|
|
|
|
}
|