GDT, page frame allocator

2025-02-27 19:48:03 +04:00
commit 6f1c6f1316
31 changed files with 2016 additions and 0 deletions
@@ -0,0 +1,81 @@
+#include "string.hpp"
+#include <cstdint>
+#include <cstddef>
+
+using namespace std;
+
+namespace Lib
+{
+    char output[1024];
+
+    // TODO make this buffer safe
+    char *int2basestr(int num, size_t radix)
+    {
+        char * str = (char *)&output;
+
+        if (!num) {
+            return "0";
+        }
+
+        char base[] = "0123456789ABCDEFGH"; // IJKLMN ....
+        if (radix < 2 || radix > (sizeof(base) - 1))
+        { // radix supported?
+            str[0] = '\0';
+            return str;
+        }
+
+        int si = 0;
+        if (num < 0)
+        {
+            str[si++] = '-';
+            num = -num;
+        }
+        char tmp[256];
+        int rdi = -1;
+        while (num)
+        {
+            tmp[++rdi] = base[num % radix];
+            num /= radix;
+        }
+        while (rdi >= 0)
+            str[si++] = tmp[rdi--];
+        str[si] = '\0';
+        return str;
+    }
+
+    char *u64_2_basestr(uint64_t num, size_t radix)
+    {
+        char * str = (char *)&output;
+
+        if (!num) {
+            return "0";
+        }
+
+        char base[] = "0123456789ABCDEFGH"; // IJKLMN ....
+
+        if (radix < 2 || radix > (sizeof(base) - 1))
+        { // radix supported?
+            str[0] = '\0';
+            return str;
+        }
+
+        int si = 0;
+
+        char tmp[256];
+        int rdi = -1;
+        while (num)
+        {
+            tmp[++rdi] = base[num % radix];
+            num /= radix;
+        }
+        while (rdi >= 0)
+            str[si++] = tmp[rdi--];
+        str[si] = '\0';
+        return str;
+    }
+
+    char *uint2basestr(uint32_t num, size_t radix)
+    {
+        return u64_2_basestr((uint64_t)num, radix);
+    }
+}
@@ -0,0 +1,20 @@
+#pragma once
+#include <cstdint>
+#include <cstddef>
+
+namespace Lib {
+    inline int strlen(const char *string) {
+        int c = 0;
+
+        while (*string != '\0') {
+            string++;
+            c++;            
+        }
+
+        return c;
+    }
+
+    char *int2basestr(int num, size_t radix);
+    char *u64_2_basestr(uint64_t num, size_t radix);
+    char *uint2basestr(uint32_t num, size_t radix);
+}