From 873a103fb71d6b7b1993a64535a7fa150317ca3c Mon Sep 17 00:00:00 2001
From: Franklin Wei <frankhwei536@gmail.com>
Date: Sat, 7 Feb 2015 10:08:34 -0500
Subject: refactor stdio

---
 kernel/include/log.h |  4 +++-
 kernel/log.c         | 26 +++++++++++++-------------
 kernel/main.c        | 15 +++++++--------
 3 files changed, 23 insertions(+), 22 deletions(-)

(limited to 'kernel')

diff --git a/kernel/include/log.h b/kernel/include/log.h
index 73a5545..fb29dd3 100644
--- a/kernel/include/log.h
+++ b/kernel/include/log.h
@@ -1 +1,3 @@
-void klog(const char*, ...);
+int log_putchar(char);
+int log_puts(const char*);
+void log(const char*, ...);
diff --git a/kernel/log.c b/kernel/log.c
index cfe2922..3f509c5 100644
--- a/kernel/log.c
+++ b/kernel/log.c
@@ -5,35 +5,35 @@
 
 #define BOCHS_PUTCHAR(ch) (outb(0xe9, ch))
 
-static int eputchar(int ch)
+int log_putchar(int ch)
 {
     BOCHS_PUTCHAR(ch);
     return 0;
 }
 
-static int eputs(const char* str)
+int log_puts(const char* str)
 {
     while(*str)
-        putchar(*str++);
+        log_putchar(*str++);
     return 0;
 }
 
-static char ehex_table[16] = { '0', '1', '2', '3', '4', '5', '6', '7',
+static char hex_table[16] = { '0', '1', '2', '3', '4', '5', '6', '7',
                               '8', '9', 'A', 'B', 'C', 'D', 'E', 'F' };
 
-static void eprint_hex(unsigned int n)
+static void log_print_hex(unsigned int n)
 {
     unsigned mask = 0xF0000000;
     unsigned shift = 28;
     while(mask)
     {
-        eputchar(ehex_table[(n & mask) >> shift]);
+        log_putchar(hex_table[(n & mask) >> shift]);
         mask >>= 4;
         shift -= 4;
     }
 }
 
-int klog(const char *fmt, ...)
+int log(const char *fmt, ...)
 {
     va_list ap;
     va_start(ap, fmt);
@@ -47,25 +47,25 @@ int klog(const char *fmt, ...)
             switch(*fmt++)
             {
             case 'c':
-                eputchar(va_arg(ap, int));
+                log_putchar(va_arg(ap, int));
                 break;
             case 's':
-                eputs(va_arg(ap, const char*));
+                log_puts(va_arg(ap, const char*));
                 break;
             case 'x':
-                eprint_hex(va_arg(ap, unsigned));
+                log_print_hex(va_arg(ap, unsigned));
                 break;
             case 'd':
-                eputs(itoa(va_arg(ap, unsigned), 10));
+                log_puts(itoa(va_arg(ap, unsigned), 10));
                 break;
             default:
-                eputs("klog: unknown format\n");
+                log_puts("klog: unknown format\n");
                 break;
             }
             break;
         }
         default:
-            eputchar(ch);
+            log_putchar(ch);
             break;
         }
     }
diff --git a/kernel/main.c b/kernel/main.c
index 748fc7f..9082859 100644
--- a/kernel/main.c
+++ b/kernel/main.c
@@ -14,12 +14,12 @@
 
 void main(struct multiboot_info_t *hdr, uint32_t magic)
 {
-    klog("main() called\n");
+    /* this should go to port e9, which is the Bochs debug port */
+    printf("Testing early I/O\n");
 
     /* initialize the TTY first, no real harm can be done */
     tty_init();
 
-    klog("tty done, magic %x\n", magic);
     if(magic != 0x2BADB002)
     {
         panic("Multiboot magic invalid");
@@ -27,10 +27,6 @@ void main(struct multiboot_info_t *hdr, uint32_t magic)
 
     vga_init((struct vbe_info_t*)hdr->vbe_mode_info);
 
-    klog("multiboot header address: %x\n", hdr);
-    klog("multiboot vbe info struct address: %x\n", hdr->vbe_mode_info);
-    klog("multiboot framebuffer: %x\n", ((struct vbe_info_t*)hdr->vbe_mode_info)->physbase);
-
     /* then the descriptor tables so we can do more useful stuff */
     gdt_init();
     idt_init();
@@ -46,9 +42,12 @@ void main(struct multiboot_info_t *hdr, uint32_t magic)
     asm("sti");
 
     printf("Boot finished.\n");
-    printf("Testing keyboard LED's...\n");
+
     for(int i=0;i<50;++i)
-        vga_drawpixel(i, i, 0x80808080);
+        vga_drawpixel(i, i, VGA_RGBPACK(255, 0, 0));
+
+    printf("Testing keyboard LED's...\n");
+
     while(1)
     {
         ps2_set_leds(PS2_NUM_LOCK);
-- 
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