Add: calloc

src/kernel/kheap.c

@@ -56,6 +56,23 @@ void* malloc(size_t size)
 	return NULL;
 }
 
+void* calloc(size_t num, size_t size)
+{
+	size_t total_size = num*size;
+	void* ptr = malloc(total_size);
+
+	if (ptr != NULL)
+	{
+		uint8_t* byte_ptr = (uint8_t*)ptr;
+		for (size_t i=0; i<total_size; i++)
+		{
+			byte_ptr[i] = 0;
+		}
+	}
+
+	return ptr;
+}
+
 void free(void* ptr)
 {
 	if (ptr == NULL) return;

src/kernel/kheap.h

@@ -20,5 +20,6 @@ typedef struct block
 void init_alloc();
 void* malloc(size_t size);
 void free(void* ptr);
+void* calloc(size_t num, size_t size);
 
 #endif

src/kernel/kmain.c

@@ -118,6 +118,10 @@ void kmain(multiboot2_info *mb_info)
     printf("[debug] malloc test ptr1=0x%x, ptr2=0x%x\n", (unsigned int)ptr1, (unsigned int)ptr2); 
     free(ptr1); free(ptr2);
 
+    void* ptr3 = calloc(1024, 2);
+    printf("[debug] calloc test ptr3=0x%x\n", (unsigned int)ptr3);
+    free (ptr3);
+
     // usually the place where i do testing
 
     timer_install();