2 files changed, 61 insertions, 11 deletions

diff --git a/src/kernel/lib/lib.h b/src/kernel/lib/lib.h
index f83c7d5..d6cc09e 100644
--- a/src/kernel/lib/lib.h
+++ b/src/kernel/lib/lib.h
@@ -3,20 +3,70 @@
 
 #include <stddef.h>
 
+/**
+ * Find the length of a string
+ * @param str The string pointer which size should be calculated
+ * @return The length of str
+ */
 size_t strlen(const char *str);
 
+/**
+ * Compare two strings
+ * @param s1 The first string pointer
+ * @param s2 The second string pointer
+ * @return The length difference between s1 and s2
+ */
 size_t strcmp(const char *s1, const char *s2);
 
-char *strcat(char *dst, const char *src);
+/**
+ * Append the data of src to dest
+ * @param dest The string destination pointer
+ * @param src The string pointer that will get appended
+ * @return The modified dest pointer
+ */
+char *strcat(char *dest, const char *src);
 
-char *strcpy(char *dst, const char *src);
+/**
+ * Copy the data of src to dest
+ * @param dest The copying destination pointer (gets replaced)
+ * @param src The string pointer that will get copied
+ * @return The modified dest pointer
+ */
+char *strcpy(char *dest, const char *src);
 
+/**
+ * Copy n data from src to dest
+ * @param dest The destination array pointer
+ * @param src The source array pointer of the data
+ * @param count The number of bytes to be copied (src)
+ * @return The modified dest pointer
+ */
 void *memory_copy(void *dest, const void *src, size_t count);
 
+/**
+ * Replace n bytes of dest by val
+ * @param dest The destination array pointer
+ * @param val The replacing chracater
+ * @param count The number of times val should replace dest entry
+ * @return The modified dest pointer
+ */
 void *memory_set(void *dest, char val, size_t count);
 
+/**
+ * Compare the first n bytes of a and b
+ * @param a_ptr The first memory area pointer
+ * @param b_ptr The second memory area pointer
+ * @param size The number of bytes to be compared
+ * @return -1 if a < b, 0 if a = b and 1 if a > b
+ */
 int memory_compare(const void *a_ptr, const void *b_ptr, size_t size);
 
+/**
+ * Convert an int into a string
+ * @param i The integer which should be converted
+ * @param b The converted int as string
+ * @return The converted string (b)
+ */
 char *itoa(int i, char b[]);
 
 #endif
diff --git a/src/kernel/lib/string.c b/src/kernel/lib/string.c
index 2b8cdfb..f07697d 100644
--- a/src/kernel/lib/string.c
+++ b/src/kernel/lib/string.c
@@ -15,24 +15,24 @@ size_t strcmp(const char *s1, const char *s2) {
     return *(const unsigned char *) s1 - *(const unsigned char *) s2;
 }
 
-char *strcat(char *dst, const char *src) {
+char *strcat(char *dest, const char *src) {
     unsigned int i = 0;
     unsigned int j = 0;
-    for (i = 0; dst[i] != 0; i++) {}
+    for (i = 0; dest[i] != 0; i++) {}
     for (j = 0; src[j] != 0; j++) {
-        dst[i + j] = src[j];
+        dest[i + j] = src[j];
     }
-    dst[i + j] = 0;
-    return dst;
+    dest[i + j] = 0;
+    return dest;
 }
 
-char *strcpy(char *dst, const char *src) {
+char *strcpy(char *dest, const char *src) {
     unsigned int i = 0;
     for (i = 0; src[i] != 0; i++) {
-        dst[i] = src[i];
+        dest[i] = src[i];
     }
-    dst[i] = 0;
-    return dst;
+    dest[i] = 0;
+    return dest;
 }
 
 char *itoa(int i, char b[]) {