kernel: drivers; vga_text_buffer: Add a printf wrapper

3 files changed, 17 insertions, 2 deletions

diff --git a/kernel/drivers/vga_text_buffer/vga_text_buffer.c b/kernel/drivers/vga_text_buffer/vga_text_buffer.c
index 3122056..b2fa331 100644
--- a/kernel/drivers/vga_text_buffer/vga_text_buffer.c
+++ b/kernel/drivers/vga_text_buffer/vga_text_buffer.c
@@ -20,6 +20,7 @@
 #include <stddef.h>
 #include <stdint.h>
 
+#include <libk/stdio.h>
 #include <libk/string.h>
 
 #include <drivers/vga_text_buffer.h>
@@ -98,3 +99,17 @@ vga_text_buffer_write_string(const char *string)
   for (size_t i = 0; i < size; i++)
     vga_text_buffer_write_char(string[i]);
 }
+
+void
+vga_text_buffer_printf(const char *string, ...)
+{
+  /* TODO: Dynamic Memory Allocation */
+  char str[256];
+
+  va_list ap;
+  va_start(ap, string);
+  vsnprintf(str, sizeof(str), string, ap);
+  va_end(ap);
+
+  vga_text_buffer_write_string(str);
+}
diff --git a/kernel/include/drivers/vga_text_buffer.h b/kernel/include/drivers/vga_text_buffer.h
index f060c7f..7bb88d6 100644
--- a/kernel/include/drivers/vga_text_buffer.h
+++ b/kernel/include/drivers/vga_text_buffer.h
@@ -55,5 +55,6 @@ bool vga_text_buffer_is_initialized(void);
 void vga_text_buffer_initialize(void);
 void vga_text_buffer_write_char(const char);
 void vga_text_buffer_write_string(const char *);
+void vga_text_buffer_printf(const char *string, ...);
 
 #endif
diff --git a/kernel/kernel/kernel.c b/kernel/kernel/kernel.c
index c999a1e..2e4470b 100644
--- a/kernel/kernel/kernel.c
+++ b/kernel/kernel/kernel.c
@@ -32,6 +32,7 @@ void
 kernel_main(uint32_t magic, multiboot_info_t *multiboot_info)
 {
   serial_initialize();
+  vga_text_buffer_initialize();
 
   if (magic != MULTIBOOT_BOOTLOADER_MAGIC) {
     printk("Kernel", "Invalid Multiboot Magic: %x", magic);
@@ -41,8 +42,6 @@ kernel_main(uint32_t magic, multiboot_info_t *multiboot_info)
   GDT_load();
   memory_map_load(multiboot_info);
 
-  vga_text_buffer_initialize();
-
   printk("Kernel", "Started.");
 
   free_memory_regions_t *free_memory_regions = memory_map_get_free_regions();