From: Duje Mihanović <duje.mihanovic@skole.hr>
Date: Fri, 13 May 2022 18:19:23 +0000 (+0200)
Subject: Add ability to print numbers in decimal
X-Git-Tag: 0.1.1~4
X-Git-Url: http://git.dujemihanovic.xyz/img/static/%7B%7B%20%24.Site.BaseURL%20%7D%7Dposts/%7B%7B%20.Permalink%20%7D%7D?a=commitdiff_plain;h=e8c050c11b7f05ec562888d6a8129ab841d163fb;p=nameless-os.git

Add ability to print numbers in decimal
---

diff --git a/Makefile b/Makefile
index 2eedce2..0e56c23 100644
--- a/Makefile
+++ b/Makefile
@@ -19,6 +19,9 @@ bootloader: $(BOOTLOADER_OBJ)
 run: all
 	$(QEMU) boot/x86/disk.img
 
+debug: all
+	$(QEMU) -s -S boot/x86/disk.img
+
 boot/x86/mbr: boot/x86/mbr.s
 boot/x86/vbr-fat32: boot/x86/vbr-fat32.s boot/x86/fat32/*.s 
 boot/x86/stage3/LOADER.BIN: boot/x86/stage3/*.s boot/x86/stage3/*.c boot/x86/fat32/*.s
@@ -54,4 +57,4 @@ clean:
 	-rm kernel/kernel.{bin,dbg,elf} ${KERNEL_OBJ}
 	cd boot/x86 && $(MAKE) clean
 
-.PHONY: default all clean run bootloader
+.PHONY: default all clean run debug bootloader
diff --git a/include/arch/x86/tty.h b/include/arch/x86/tty.h
index 3ddd6b5..e141069 100644
--- a/include/arch/x86/tty.h
+++ b/include/arch/x86/tty.h
@@ -27,4 +27,5 @@ extern void kprintb(const uint8_t byte);
 extern void kprintw(const uint16_t word);
 extern void kprintd(const uint32_t dword);
 extern void kprintq(const uint64_t qword);
+extern int kprintdec(uint32_t num);
 #endif
diff --git a/kernel/arch/x86/tty/tty.c b/kernel/arch/x86/tty/tty.c
index 2110a7d..861610d 100644
--- a/kernel/arch/x86/tty/tty.c
+++ b/kernel/arch/x86/tty/tty.c
@@ -175,3 +175,38 @@ void kprintq(uint64_t qword)
 	temp = qword & 0xF;
 	kprintc(hex_chars[temp], VGA_COLOR_LIGHT_GRAY);
 }
+
+int kprintdec(uint32_t num)
+{
+	char buffer[11];
+	int digits = 10;
+	/* TODO: make an actual memset function to use instead of this */
+	for (int i=0; i<11; i++) {
+		buffer[i] = 0;
+	}
+
+	/* put the numbers in the buffer */
+	for (int i=9; i>0 && num>0; i--) {
+		uint8_t currdigit = num%10;
+		buffer[i] = currdigit+'0';
+		num /= 10;
+	}
+
+	/* shift the array as much as needed */
+	while (*buffer == '\0') {
+		digits--;
+		for (int i=0; i<9; i++) {
+			buffer[i] = buffer[i+1];
+		}
+	}
+
+	/* zero out any leftovers */
+	if (digits < 10) {
+		for (int i=digits; i<10; i++) {
+			buffer[i] = '\0';
+		}
+	}
+
+	kprint(buffer, 0);
+	return digits;
+}
diff --git a/kernel/kernel.c b/kernel/kernel.c
index 9257a0e..16b2b40 100644
--- a/kernel/kernel.c
+++ b/kernel/kernel.c
@@ -59,5 +59,9 @@ void kmain(struct e820_map *mmap, int mmap_size)
 	pic_unmask(1);
 	asm volatile ("sti");
 	kprint("All done\n", 0);
+	kprintdec(12345);
+	kprintc('\n');
+	kprintdec(6789);
+	kprintc('\n');
 	while(1);
 }