1 files changed, 194 insertions, 0 deletions
diff --git a/dev/kernel/src/AsciiUtils.cc b/dev/kernel/src/AsciiUtils.cc
new file mode 100644
index 00000000..087b6d5f
--- /dev/null
+++ b/dev/kernel/src/AsciiUtils.cc
@@ -0,0 +1,194 @@
+/* -------------------------------------------
+
+  Copyright (C) 2024-2025, Amlal El Mahrouss, all rights reserved.
+
+------------------------------------------- */
+
+#include <NeKit/Utils.h>
+
+namespace Kernel {
+
+STATIC Int rt_copy_memory_safe(const voidPtr src, voidPtr dst, Size len, Size dst_size);
+STATIC 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;
+}
+
+STATIC 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);
+}
+
+STATIC 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;
+}
+
+Int32 rt_strcmp(const Char* a, const Char* b) {
+  Size i = 0;
+  while (a[i] != '\0' && b[i] != '\0' && a[i] == b[i]) {
+    ++i;
+  }
+  return static_cast<Int32>(static_cast<UInt8>(a[i]) -
+                            static_cast<UInt8>(b[i]));
+}
+
+  // @uses the deprecated version callers should ensure 'len' is valid.
+extern "C" void* memset(void* dst, int c, long long unsigned int len) {
+  return Kernel::rt_set_memory(dst, c, static_cast<Size>(len));
+}
+
+extern "C" void* memcpy(void* dst, const void* src, long long unsigned int len) {
+  Kernel::rt_copy_memory(const_cast<void*>(src), dst, static_cast<Size>(len));
+  return dst;
+}
+
+extern "C" Kernel::Int32 strcmp(const char* a, const char* b) {
+  return Kernel::rt_strcmp(a, b);
+}
+
+}