Fixed build issues: memory allocation, terminal functions, and type m…

…ismatches

kernel/compiler.cpp

@@ -1,32 +1,6 @@
 #include "compiler.h"
 #include "memory.h"
-
-// Custom implementations for bare metal environment
-extern "C" {
-    void* memcpy(void* dest, const void* src, size_t n) {
-        char* d = (char*)dest;
-        const char* s = (const char*)src;
-        while (n--) *d++ = *s++;
-        return dest;
-    }
-
-    void* memset(void* dest, int val, size_t n) {
-        unsigned char* ptr = (unsigned char*)dest;
-        while (n--) *ptr++ = (unsigned char)val;
-        return dest;
-    }
-
-    int memcmp(const void* s1, const void* s2, size_t n) {
-        const unsigned char* p1 = (const unsigned char*)s1;
-        const unsigned char* p2 = (const unsigned char*)s2;
-        while (n--) {
-            if (*p1 != *p2) return *p1 - *p2;
-            p1++;
-            p2++;
-        }
-        return 0;
-    }
-}
+#include <string.h>
 
 // Simple assembly instruction structure
 struct Instruction {
@@ -47,6 +21,12 @@ enum OpCode {
     OP_INT = 0x08
 };
 
+extern "C" {
+    void* memcpy(void* dest, const void* src, size_t n);
+    void* memset(void* dest, int val, size_t n);
+    int memcmp(const void* s1, const void* s2, size_t n);
+}
+
 static unsigned char* output_buffer = nullptr;
 static size_t output_size = 0;
 
@@ -153,7 +133,7 @@ bool execute_binary(const unsigned char* binary, size_t size) {
     if (!binary || size == 0) return false;
 
     // Create executable memory page
-    void* exec_mem = malloc(size);
+    void* exec_mem = memory_allocate(size);
     if (!exec_mem) return false;
 
     // Copy binary to executable memory
@@ -165,6 +145,6 @@ bool execute_binary(const unsigned char* binary, size_t size) {
     func();
 
     // Clean up
-    free(exec_mem);
+    memory_free(exec_mem);
     return true;
 }

kernel/editor.cpp

@@ -24,7 +24,10 @@ void editor_init() {
     E.cursor_x = 0;
     E.cursor_y = 0;
     E.filename = nullptr;
-    terminal_get_size(&E.screen_rows, &E.screen_cols);
+    size_t rows, cols;
+    terminal_get_size(&rows, &cols);
+    E.screen_rows = rows;
+    E.screen_cols = cols;
     if (E.screen_rows == 0) E.screen_rows = 24;
     if (E.screen_cols == 0) E.screen_cols = 80;
     E.screen_rows--; // Make room for status line
@@ -140,11 +143,11 @@ void editor_refresh_screen() {
 
     // Status line
     char status[80];
-    int len = snprintf(status, sizeof(status), "%.20s - %zu bytes %d,%d",
+    int len = snprintf(status, sizeof(status), "%.20s - %zu bytes %zu,%zu",
         E.filename ? E.filename : "[No Name]", 
         E.buffer_size,
-        (int)E.cursor_y + 1,
-        (int)E.cursor_x + 1);
+        E.cursor_y + 1,
+        E.cursor_x + 1);
 
     if (len > (int)E.screen_cols) len = E.screen_cols;
 

kernel/kernel.cpp

@@ -12,6 +12,9 @@ extern "C" {
     extern void* memset(void* s, int c, size_t n);
 }
 
+// External functions
+extern void int_to_string(int value, char* str);
+
 // Global kernel state
 KernelState kernel_state = {
     .terminal_row = 0,

kernel/memory.cpp

@@ -123,6 +123,13 @@ size_t memory_get_total() {
 }
 
 size_t memory_get_free() {
-    // TODO: Implement actual free memory tracking
-    return 32 * 1024 * 1024; // Return 32MB for now
+    return HEAP_SIZE - sizeof(struct block_meta);
+}
+
+extern "C" void* memory_allocate(size_t size) {
+    return malloc(size);
+}
+
+extern "C" void memory_free(void* ptr) {
+    free(ptr);
 }