public unsafe static uint SizeofMin5Byte(void *code)
{
uint Result = 0U;
LDasm.ldasm_data data = default(LDasm.ldasm_data);
bool is64 = IntPtr.Size == 8;
uint Length;
do
{
Length = LDasm.ldasm(code, data, is64);
byte *pOpcode = (byte *)code + data.opcd_offset;
Result += Length;
if (Result >= 5U)
{
break;
}
if (Length == 1U && *pOpcode == 204)
{
break;
}
code = (void *)((byte *)code + (ulong)Length);
}while (Length > 0U);
return(Result);
}
private unsafe static uint ldasm(void *code, LDasm.ldasm_data ld, bool is64)
{
byte *p = (byte *)code;
byte pr_67;
byte pr_66;
byte s;
byte rexw = s = (pr_66 = (pr_67 = 0));
uint result;
if ((int)code == 0)
{
result = 0U;
}
else
{
while ((LDasm.cflags(*p) & 128) != 0)
{
if (*p == 102)
{
pr_66 = 1;
}
if (*p == 103)
{
pr_67 = 1;
}
p++;
s += 1;
ld.flags |= 2;
if (s == 15)
{
ld.flags |= 1;
return((uint)s);
}
}
if (is64 && *p >> 4 == 4)
{
ld.rex = *p;
rexw = (byte)(ld.rex >> 3 & 1);
ld.flags |= 4;
p++;
s += 1;
}
if (is64 && *p >> 4 == 4)
{
ld.flags |= 1;
s += 1;
result = (uint)s;
}
else
{
ld.opcd_offset = (byte)((long)((byte *)p - (byte *)code));
ld.opcd_size = 1;
byte op = *(p++);
s += 1;
byte f;
if (op == 15)
{
op = *(p++);
s += 1;
ld.opcd_size += 1;
f = LDasm.cflags_ex(op);
if ((f & 128) != 0)
{
ld.flags |= 1;
return((uint)s);
}
if ((f & 16) != 0)
{
op = *(p++);
s += 1;
ld.opcd_size += 1;
}
}
else
{
f = LDasm.cflags(op);
if (op >= 160 && op <= 163)
{
pr_66 = pr_67;
}
}
if ((f & 64) != 0)
{
byte mod = (byte)(*p >> 6);
byte ro = (byte)((*p & 56) >> 3);
byte rm = (byte)(*p & 7);
ld.modrm = *(p++);
s += 1;
ld.flags |= 8;
if (op == 246 && (ro == 0 || ro == 1))
{
f |= 1;
}
if (op == 247 && (ro == 0 || ro == 1))
{
f |= 8;
}
if (mod != 3 && rm == 4 && (is64 || pr_67 == 0))
{
ld.sib = *(p++);
s += 1;
ld.flags |= 16;
if ((ld.sib & 7) == 5 && mod == 0)
{
ld.disp_size = 4;
}
}
switch (mod)
{
case 0:
if (is64)
{
if (rm == 5)
{
ld.disp_size = 4;
if (is64)
{
ld.flags |= 128;
}
}
}
else if (pr_67 != 0)
{
if (rm == 6)
{
ld.disp_size = 2;
}
}
else if (rm == 5)
{
ld.disp_size = 4;
}
break;
case 1:
ld.disp_size = 1;
break;
case 2:
if (is64)
{
ld.disp_size = 4;
}
else if (pr_67 != 0)
{
ld.disp_size = 2;
}
else
{
ld.disp_size = 4;
}
break;
}
if (ld.disp_size > 0)
{
ld.disp_offset = (byte)((long)((byte *)p - (byte *)code));
p += ld.disp_size;
s += ld.disp_size;
ld.flags |= 32;
}
}
if (rexw != 0 && (f & 8) != 0)
{
ld.imm_size = 8;
}
else if ((f & 4) != 0 || (f & 8) != 0)
{
ld.imm_size = (byte)(4 - ((int)pr_66 << 1));
}
ld.imm_size += (byte)(f & 3);
if (ld.imm_size != 0)
{
s += ld.imm_size;
ld.imm_offset = (byte)((long)((byte *)p - (byte *)code));
ld.flags |= 64;
if ((f & 32) != 0)
{
ld.flags |= 128;
}
}
if (s > 15)
{
ld.flags |= 1;
}
result = (uint)s;
}
}
return(result);
}
