LunaHook-mirror/LunaHook/engines/mono/monoil2cpp.cpp

#include"def_mono.hpp"
#include"def_il2cpp.hpp"
namespace{
std::optional<std::wstring_view> readmonostring(void* ptr){
    if(!ptr)return {};
    MonoString* string = (MonoString*)ptr;
    auto data = (wchar_t*)string->chars;
    auto len=string->length;
    if(!(len&&data))return {};
    if(wcslen(data)!=len)return {};
    return std::wstring_view(data,len);
}
void* createmonostring(std::wstring_view ws,MonoString* origin){
    auto newstring=(MonoString*)malloc(sizeof(MonoString)+ws.size()+2);
    memcpy(newstring,origin,sizeof(MonoString));
    memcpy((wchar_t*)newstring->chars,ws.data(),ws.size()*2);
    newstring->length=ws.size();
    return newstring;
}
}
void commonsolvemonostring(uintptr_t offset,uintptr_t *data,  size_t*len){
    auto sw=il2cppfunctions::get_string((void*)offset);
    if(!sw)sw=monofunctions::get_string((void*)offset);
    if(!sw)sw=readmonostring((void*)offset);
    if(!sw)return;
    auto sw_v=sw.value();
    *data=(uintptr_t)sw_v.data();
    *len=sw_v.length()*sizeof(wchar_t);
    if(*len>TEXT_BUFFER_SIZE){
        *len=0;
        return;
    }
}

void unity_ui_string_hook_after(uintptr_t *offset,void* data, size_t len)
{ 
    auto view=std::wstring_view((wchar_t*)data,len/2);
    auto newstring=il2cppfunctions::create_string(view);
    if(!newstring)newstring=monofunctions::create_string(view);
    if(!newstring)newstring=createmonostring(view,(MonoString*)*offset);
    *offset=(uintptr_t)newstring;
}

uintptr_t tryfindmonoil2cpp(const char *_dll, const char *_namespace, const char *_class, const char *_method, int paramCoun,bool strict){
    auto addr=il2cppfunctions::get_method_pointer(_dll,_namespace,_class,_method,paramCoun,strict);
    if(addr)return addr;
    return monofunctions::get_method_pointer(_dll,_namespace,_class,_method,paramCoun,strict);
}