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VmStringUtils.cpp
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139 lines (116 loc) · 4.38 KB
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#include "il2cpp-config.h"
#include "VmStringUtils.h"
#include "il2cpp-object-internals.h"
#include "../char-conversions.h"
#include "utils/Functional.h"
#include "utils/StringUtils.h"
#include "External/utfcpp/source/utf8.h"
namespace il2cpp
{
namespace utils
{
Il2CppChar VmStringUtils::Utf16ToLower(Il2CppChar c)
{
const Il2CppChar kDataLowThreshold = 9423;
const Il2CppChar kDataHighThreshold = 65313;
if (c <= kDataLowThreshold)
{
c = ToLowerDataLow[c];
}
else if (c >= kDataHighThreshold)
{
c = ToLowerDataHigh[c - kDataHighThreshold];
}
return c;
}
bool VmStringUtils::CaseSensitiveComparer::operator()(const std::string& left, const std::string& right) const
{
return left == right;
}
bool VmStringUtils::CaseSensitiveComparer::operator()(const std::string& left, const char* right) const
{
return left.compare(right) == 0;
}
bool VmStringUtils::CaseSensitiveComparer::operator()(const char* left, const std::string& right) const
{
return right.compare(left) == 0;
}
bool VmStringUtils::CaseSensitiveComparer::operator()(const char* left, const char* right) const
{
return strcmp(left, right) == 0;
}
static inline void Utf32CharToSurrogatePair(uint32_t c, Il2CppChar(&surrogatePair)[2])
{
const Il2CppChar kLeadOffset = 55232;
const Il2CppChar kTrailSurrogateMin = 56320;
if (c > 0xffff)
{
surrogatePair[0] = static_cast<Il2CppChar>((c >> 10) + kLeadOffset);
surrogatePair[1] = static_cast<Il2CppChar>((c & 0x3ff) + kTrailSurrogateMin);
}
else
{
surrogatePair[0] = static_cast<Il2CppChar>(c);
surrogatePair[1] = 0;
}
}
static inline bool Utf16CharEqualsIgnoreCase(Il2CppChar left, Il2CppChar right)
{
return VmStringUtils::Utf16ToLower(left) == VmStringUtils::Utf16ToLower(right);
}
bool VmStringUtils::CaseInsensitiveComparer::operator()(const std::string& left, const std::string& right) const
{
return operator()(left.c_str(), right.c_str());
}
bool VmStringUtils::CaseInsensitiveComparer::operator()(const std::string& left, const char* right) const
{
return operator()(left.c_str(), right);
}
bool VmStringUtils::CaseInsensitiveComparer::operator()(const char* left, const std::string& right) const
{
return operator()(left, right.c_str());
}
bool VmStringUtils::CaseInsensitiveComparer::operator()(const char* left, const char* right) const
{
#if IL2CPP_DEBUG // Invalid UTF8 strings shouldn't be passed here, so let's assert in debug mode
IL2CPP_ASSERT(utf8::is_valid(left, left + strlen(left)));
IL2CPP_ASSERT(utf8::is_valid(right, right + strlen(right)));
#endif
Il2CppChar utf16Left[2];
Il2CppChar utf16Right[2];
while (*left && *right)
{
Utf32CharToSurrogatePair(utf8::unchecked::next(left), utf16Left);
Utf32CharToSurrogatePair(utf8::unchecked::next(right), utf16Right);
if (!Utf16CharEqualsIgnoreCase(utf16Left[0], utf16Right[0]) ||
!Utf16CharEqualsIgnoreCase(utf16Left[1], utf16Right[1]))
{
return false;
}
}
return *left == '\0' && *right == '\0';
}
bool VmStringUtils::CaseSensitiveEquals(Il2CppString* left, const char* right)
{
std::string leftString = StringUtils::Utf16ToUtf8(left->chars);
functional::Filter<const char*, CaseSensitiveComparer> equalsLeft(leftString.c_str());
return equalsLeft(right);
}
bool VmStringUtils::CaseSensitiveEquals(const char* left, const char* right)
{
functional::Filter<const char*, CaseSensitiveComparer> equalsLeft(left);
return equalsLeft(right);
}
bool VmStringUtils::CaseInsensitiveEquals(Il2CppString* left, const char* right)
{
std::string leftString = StringUtils::Utf16ToUtf8(left->chars);
functional::Filter<const char*, CaseInsensitiveComparer> equalsLeft(leftString.c_str());
return equalsLeft(right);
}
bool VmStringUtils::CaseInsensitiveEquals(const char* left, const char* right)
{
functional::Filter<const char *, CaseInsensitiveComparer> equalsLeft(left);
return equalsLeft(right);
}
}
}