Initial commit

kernel/libc/libc.c

@@ -0,0 +1,40 @@
+/*
+ * libc.c
+ *
+ *  Created on: Oct 11, 2018
+ *      Author: rick
+ */
+
+#include "libc.h"
+
+int memcpy(char *dst, char *src, int amount) {
+    for (int i = 0; i < amount; i++) {
+        dst[i] = src[i];
+    }
+    return 0;
+}
+
+int memset(char *dst, char data, int amount) {
+    for (int i = 0; i < amount; ++i) {
+        dst[i] = data;
+    }
+    return 0;
+}
+
+int itoa(int i, char *target) {
+    target[0] = (char) (i % 10 + '0');
+    target[1] = '\0';
+    if (i > 9) {
+        itoa(i / 10, target + 1);
+    }
+    return 0;
+}
+
+int strlen(char *str) {
+    int length = 0;
+    while (str[length] != 0) {
+        length++;
+    }
+    return length;
+}
+

kernel/libc/libc.h

@@ -0,0 +1,19 @@
+/*
+ * libc.h
+ *
+ *  Created on: Oct 11, 2018
+ *      Author: rick
+ */
+
+#ifndef KERNEL_LIBC_LIBC_H_
+#define KERNEL_LIBC_LIBC_H_
+
+int memcpy(char *dst, char *src, int amount);
+
+int memset(char *dst, char data, int amount);
+
+int itoa(int i, char *target);
+
+int strlen(char *str);
+
+#endif /* KERNEL_LIBC_LIBC_H_ */