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/* -------------------------------------------
Copyright (C) 2024-2025, Amlal El Mahrouss, all rights reserved.
------------------------------------------- */
#include <NeKit/Utils.h>
namespace Kernel {
Int rt_copy_memory_safe(const voidPtr src, voidPtr dst, Size len, Size dst_size);
voidPtr rt_set_memory_safe(voidPtr dst, UInt32 value, Size len, Size dst_size);
Int32 rt_string_cmp(const Char* src, const Char* cmp, Size size) {
for (Size i = 0; i < size; ++i) {
if (src[i] != cmp[i]) return static_cast<Int32>(src[i]) - static_cast<Int32>(cmp[i]);
}
return 0;
}
SizeT rt_string_len(const Char* str, SizeT max_len) {
SizeT len = 0;
while (len < max_len && str[len] != '\0') ++len;
return len;
}
Size rt_string_len(const Char* ptr) {
Size cnt = 0;
while (ptr[cnt] != '\0') ++cnt;
return cnt;
}
const Char* rt_alloc_string(const Char* src) {
SizeT slen = rt_string_len(src);
Char* buffer = new Char[slen + 1];
if (!buffer) return nullptr;
if (rt_copy_memory_safe(reinterpret_cast<voidPtr>(const_cast<Char*>(src)),
reinterpret_cast<voidPtr>(buffer), slen, slen + 1) < 0) {
delete[] buffer;
return nullptr;
}
buffer[slen] = '\0';
return buffer;
}
Int rt_copy_memory_safe(const voidPtr src, voidPtr dst, Size len, Size dst_size) {
if (!src || !dst || len > dst_size) {
if (dst && dst_size) {
rt_set_memory_safe(dst, 0, dst_size, dst_size);
}
return -1;
}
auto s = reinterpret_cast<const UInt8*>(src);
auto d = reinterpret_cast<UInt8*>(dst);
for (Size i = 0; i < len; ++i) d[i] = s[i];
return static_cast<Int>(len);
}
voidPtr rt_set_memory_safe(voidPtr dst, UInt32 value, Size len, Size dst_size) {
if (!dst || len > dst_size) return nullptr;
auto p = reinterpret_cast<UInt8*>(dst);
UInt8 v = static_cast<UInt8>(value & 0xFF);
for (Size i = 0; i < len; ++i) p[i] = v;
return dst;
}
Void rt_zero_memory(voidPtr pointer, Size len) {
rt_set_memory_safe(pointer, 0, len, len);
}
#ifdef __NE_ENFORCE_DEPRECATED_WARNINGS
[[deprecated("Use rt_set_memory_safe instead")]]
#endif
voidPtr rt_set_memory(voidPtr src, UInt32 value, Size len) {
if (!src) return nullptr;
auto p = reinterpret_cast<UInt8*>(src);
UInt8 v = static_cast<UInt8>(value & 0xFF);
for (Size i = 0; i < len; ++i) p[i] = v;
return src;
}
#ifdef __NE_ENFORCE_DEPRECATED_WARNINGS
[[deprecated("Use rt_copy_memory_safe instead")]]
#endif
Int rt_copy_memory(const voidPtr src, voidPtr dst, Size len) {
if (!src || !dst) return -1;
auto s = reinterpret_cast<const UInt8*>(src);
auto d = reinterpret_cast<UInt8*>(dst);
for (Size i = 0; i < len; ++i) d[i] = s[i];
return static_cast<Int>(len);
}
Int32 rt_to_uppercase(Int32 ch) {
return (ch >= 'a' && ch <= 'z') ? ch - 0x20 : ch;
}
Int32 rt_to_lower(Int32 ch) {
return (ch >= 'A' && ch <= 'Z') ? ch + 0x20 : ch;
}
Int32 rt_is_alnum(Int32 ch) {
return (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z') || (ch >= '0' && ch <= '9');
}
Boolean rt_is_space(Char ch) {
return ch == ' ';
}
Boolean rt_is_newln(Char ch) {
return ch == '\n';
}
Char rt_to_char(UInt64 value, Int32 base) {
static constexpr Char kDigits[] = "0123456789ABCDEF";
return kDigits[value % base];
}
Bool rt_to_string(Char* str, UInt64 value, Int32 base) {
#ifdef __NE_AMD64__
Int i = 0;
do {
str[i++] = rt_to_char(value, base);
value /= base;
} while (value);
str[i] = '\0';
// in-place
for (Int j = 0; j < i / 2; ++j) {
Char tmp = str[j];
str[j] = str[i - j - 1];
str[i - j - 1] = tmp;
}
#endif
return true;
}
VoidPtr rt_string_in_string(const Char* haystack, const Char* needle) {
SizeT needle_len = rt_string_len(needle);
SizeT hay_len = rt_string_len(haystack);
if (needle_len > hay_len) return nullptr;
for (SizeT i = 0; i <= hay_len - needle_len; ++i) {
if (rt_string_cmp(haystack + i, needle, needle_len) == 0) {
return reinterpret_cast<voidPtr>(const_cast<Char*>(haystack + i));
}
}
return nullptr;
}
Char* rt_string_has_char(Char* str, Char ch) {
while (*str && *str != ch) ++str;
return (*str == ch) ? str : nullptr;
}
EXTERN_C void* memset(void* dst, int c, long long unsigned int len) {
return Kernel::rt_set_memory_safe(dst, c, static_cast<Size>(len), static_cast<Size>(len));
}
EXTERN_C void* memcpy(void* dst, const void* src, long long unsigned int len) {
Kernel::rt_copy_memory_safe(const_cast<void*>(src), dst, static_cast<Size>(len),
static_cast<Size>(len));
return dst;
}
EXTERN_C Kernel::Int32 strcmp(const char* a, const char* b) {
return Kernel::rt_string_cmp(a, b, rt_string_len(a));
}
} // namespace Kernel
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