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/* -------------------------------------------
Copyright (C) 2024-2025, Amlal El Mahrouss, all rights reserved.
------------------------------------------- */
#include <user/Opts.h>
#include <user/SystemCalls.h>
/// @file SystemCalls.cc
/// @brief Source file for the memory functions of the user.sys.
/// @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;
}
/// @brief Get string length.
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;
}
/// @brief Print to the file descriptor.
/// @param desc the file descriptor.
IMPORT_C SInt32 PrintOut(_Input IORef desc, const char* fmt, ...) {
va_list args;
va_start(args, fmt);
auto ret = (UInt64*) sci_syscall_arg_4(5, reinterpret_cast<VoidPtr>(desc),
reinterpret_cast<VoidPtr>(const_cast<Char*>(fmt)), args);
va_end(args);
return *ret;
}
/// @internal
IMPORT_C Void _rtl_assert(Bool expr, const Char* origin) {
if (!expr) {
PrintOut(nullptr, "Assertion failed: %s\r", origin);
PrintOut(nullptr, "Origin: %s\r", origin);
}
}
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