#include"morning.h"

regs mov_xl_exx(int reg) { 
    auto off = regs::invalid;
    reg = reg & 7;
    switch (reg) {
    case 3:
      off = regs::ebx; break;
    case 0:
      off = regs::eax; break;
    case 1:
      off = regs::ecx; break;
    case 2:
      off = regs::edx; break;
    case 6:
      off = regs::esi; break;
    case 7:
      off = regs::edi; break;
    }
    return off;  
}
		
bool shiftjis81() {
  //morning
  /*if (((unsigned __int8)*a7 < 0x81u || (unsigned __int8)*a7 > 0x9Fu)
    && ((unsigned __int8)*a7 < 0xE0u || (unsigned __int8)*a7 > 0xFCu))*/
  const BYTE bytes81[] = {
      0x8A,XX,
      0x81,XX,0x81,0x00,0x00,0x00
  };
  const BYTE bytes81eax[] = {
      0x8A,XX,
      XX,0x81,0x00,0x00,0x00
  };
  
  int idx = 0;
  auto succ=false;
  for (auto bs : { bytes81,bytes81eax}) {
    for (auto addr : Util::SearchMemory(bs, idx  ? 7 : 8, PAGE_EXECUTE, processStartAddress, processStopAddress)) {
        
      int jumpxxop = *(((BYTE*)addr) + (idx  ? 7 : 8)); 
      if (jumpxxop < 0x7c || jumpxxop>0x7f)continue;
      auto off = mov_xl_exx(*(((BYTE*)addr) + 1)); 
      if (off == regs::invalid)continue;
      HookParam hp;
      hp.address = addr;
      hp.offset =get_reg(off);
      hp.type = USING_STRING | NO_CONTEXT;
      succ|=NewHook(hp, "shiftjis819fefc");
    }
    idx += 1;
  }
  

  return  succ;
}
		

bool morning::attach_function() { 
    return shiftjis81();
}