From 48a608c8959fc696184bc1af2f67ecd07c0381ba Mon Sep 17 00:00:00 2001
From: Loic Guegan <manzerbredes@mailbox.org>
Date: Sun, 4 Apr 2021 14:03:26 +0200
Subject: [PATCH] Add utilities functions

---
 src/bringelle.c   |  7 ++-----
 src/utils/print.c | 48 +++++++++++++++++++++++++++++++++++++++++++++--
 src/utils/print.h |  6 ++++++
 src/utils/types.h |  8 ++++++++
 4 files changed, 62 insertions(+), 7 deletions(-)
 create mode 100644 src/utils/types.h

diff --git a/src/bringelle.c b/src/bringelle.c
index 4c8e39f..d8bbe82 100644
--- a/src/bringelle.c
+++ b/src/bringelle.c
@@ -1,11 +1,8 @@
 #include "utils/print.h"
 
-
-
-
 void bringelle(){
-  putchar('L');
-  putchar('L');
+  clear();
+  print("Booting Bringelle...");
 
   while(1);
 }
diff --git a/src/utils/print.c b/src/utils/print.c
index c7c94d4..8fab941 100644
--- a/src/utils/print.c
+++ b/src/utils/print.c
@@ -1,7 +1,51 @@
 #include "print.h"
+#include "types.h"
+
+#define MAX_COL 80
+#define MAX_LINE 25
+
+char *video=(char *)0xB8000;
+u8 col=0;
+u8 line=0;
 
 
 void putchar(char c){
-  char *video=(char *)0xB8000;
-  video[0]=c;
+  // Print char
+  video[col*2+MAX_COL*line*2]=c;
+  // Refresh location
+  col+=1;
+  if(col>= MAX_COL){
+    col=0;
+    line+=1;
+    if(line>=MAX_LINE){
+      line=MAX_LINE-1;
+      scrollup();
+    }
+  }
+}
+
+void print(char *str){
+  int i=0;
+  while(str[i]!='\0'){
+    putchar(str[i]);
+    i++;
+  }
+}
+
+void clear(){
+  for(char i=0;i<MAX_LINE;i++){
+    scrollup();
+  }
+}
+
+void scrollup(){
+  // Move line up
+  for(char i=1;i<=MAX_LINE;i++){
+    for(char j=0;j<=MAX_COL;j++)
+      video[j*2+MAX_COL*(i-1)*2]=video[j*2+MAX_COL*i*2];
+  }
+  // Clear last line
+  for(char i=0;i<=MAX_COL;i++){
+    video[col*2+MAX_COL*(MAX_LINE-1)*2]='\0';
+  }
 }
diff --git a/src/utils/print.h b/src/utils/print.h
index 51ed076..fb1badd 100644
--- a/src/utils/print.h
+++ b/src/utils/print.h
@@ -2,6 +2,12 @@
 #define PRINT_H
 
 
+/**
+ * Print char
+ */
 void putchar(char);
+void print(char*);
+void scrollup();
+void clear();
 
 #endif
diff --git a/src/utils/types.h b/src/utils/types.h
new file mode 100644
index 0000000..b06b160
--- /dev/null
+++ b/src/utils/types.h
@@ -0,0 +1,8 @@
+#ifndef TYPES_H
+#define TYPES_h
+
+typedef unsigned char u8;
+typedef unsigned short u16;
+typedef unsigned int u32;
+
+#endif