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/* -------------------------------------------
Copyright (C) 2024-2025, Amlal El Mahrouss, all rights reserved.
------------------------------------------- */
#include <user/SystemCalls.h>
/// @file SystemCalls.cc
/// @brief Source file for the memory functions of the libsci.
IMPORT_C VoidPtr sci_syscall_arg_1(SizeT id);
IMPORT_C VoidPtr sci_syscall_arg_2(SizeT id, VoidPtr arg1);
IMPORT_C VoidPtr sci_syscall_arg_3(SizeT id, VoidPtr arg1, VoidPtr arg3);
IMPORT_C VoidPtr sci_syscall_arg_4(SizeT id, VoidPtr arg1, VoidPtr arg3, VoidPtr arg4);
/// @brief Copy memory region.
IMPORT_C VoidPtr MmCopyMemory(_Input VoidPtr dest, _Input VoidPtr src, _Input SizeT len)
{
if (!len ||
!dest ||
!src)
{
return nullptr;
}
for (SizeT i = 0; i < len; i++)
{
((Char*)dest)[i] = ((Char*)src)[i];
}
return dest;
}
IMPORT_C SInt64 MmStrLen(const Char* in)
{
if (!in)
return 0;
SizeT len{0};
do
{
++len;
} while (in[len] != '\0');
return len;
}
/// @brief Fill memory region **dest** with **value**.
IMPORT_C VoidPtr MmFillMemory(_Input VoidPtr dest, _Input SizeT len, _Input UInt8 value)
{
if (!len ||
!dest)
{
return nullptr;
}
for (SizeT i = 0; i < len; i++)
{
((Char*)dest)[i] = value;
}
return dest;
}
IMPORT_C Ref IoOpenFile(_Input const Char* path, _Input const Char* drv_letter)
{
return sci_syscall_arg_3(1, reinterpret_cast<VoidPtr>(const_cast<Char*>(path)),
reinterpret_cast<VoidPtr>(const_cast<Char*>(drv_letter)));
}
IMPORT_C Void IoCloseFile(_Input Ref desc)
{
sci_syscall_arg_2(2, desc);
}
IMPORT_C UInt64 IoSeekFile(_Input Ref desc, _Input UInt64 off)
{
auto ret = (UInt64*)sci_syscall_arg_3(3, reinterpret_cast<VoidPtr>(desc),
reinterpret_cast<VoidPtr>(&off));
MUST_PASS((*ret) != ~0UL);
return *ret;
}
IMPORT_C UInt64 IoTellFile(_Input Ref desc)
{
auto ret = (UInt64*)sci_syscall_arg_2(4, reinterpret_cast<VoidPtr>(desc));
return *ret;
}
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