Pridana verze v0.1

2026-07-12 05:44:42 +02:00
commit 1266a65b82
40 changed files with 6126 additions and 0 deletions
@@ -0,0 +1,106 @@
+/*
+ * AsterOS Kernel
+ * Autor: Pavel Kalaš
+ * Rok: 2026
+ *
+ */
+
+/*
+ * Tento modul implementuje tiskovou vrstvu kernelu nad VGA vystupem.
+ * Obsahuje podporu zakladnich formatovacich specifikatoru pro ladeni
+ * a jednotne API, ktere pouzivaji ostatni casti jadra pri logovani.
+ */
+
+#include <stdarg.h>
+
+#include "display.h"
+#include "printk.h"
+
+static void print_u64(unsigned long long value, unsigned int base) {
+    char buf[32];
+    const char *digits = "0123456789abcdef";
+    int i = 0;
+
+    if (value == 0) {
+        display_putc('0');
+        return;
+    }
+
+    while (value > 0 && i < (int)sizeof(buf)) {
+        buf[i++] = digits[value % base];
+        value /= base;
+    }
+
+    while (i > 0) {
+        display_putc(buf[--i]);
+    }
+}
+
+void aster_print(const char *text) {
+    display_write(text);
+}
+
+void printk(const char *fmt, ...) {
+    va_list args;
+
+    va_start(args, fmt);
+
+    while (*fmt) {
+        if (*fmt != '%') {
+            display_putc(*fmt++);
+            continue;
+        }
+
+        ++fmt;
+        switch (*fmt) {
+            case '%':
+                display_putc('%');
+                break;
+            case 'c': {
+                int c = va_arg(args, int);
+                display_putc((char)c);
+                break;
+            }
+            case 's': {
+                const char *s = va_arg(args, const char *);
+                if (!s) {
+                    s = "(null)";
+                }
+                display_write(s);
+                break;
+            }
+            case 'd': {
+                long v = va_arg(args, int);
+                if (v < 0) {
+                    display_putc('-');
+                    print_u64((unsigned long long)(-v), 10);
+                } else {
+                    print_u64((unsigned long long)v, 10);
+                }
+                break;
+            }
+            case 'u': {
+                unsigned int v = va_arg(args, unsigned int);
+                print_u64(v, 10);
+                break;
+            }
+            case 'x': {
+                unsigned int v = va_arg(args, unsigned int);
+                print_u64(v, 16);
+                break;
+            }
+            case 'p': {
+                unsigned long long v = (unsigned long long)va_arg(args, void *);
+                display_write("0x");
+                print_u64(v, 16);
+                break;
+            }
+            default:
+                display_putc('?');
+                break;
+        }
+        ++fmt;
+    }
+
+    va_end(args);
+}