fat_io_lib port WIP

kernel/libk/string.c

@@ -65,3 +65,30 @@ int strcmp (const char* s1, const char* s2) {
   }
   return *(const unsigned char*)s1 - *(const unsigned char*)s2;
 }
+
+/* https://stackoverflow.com/a/2490637 */
+char* strcat (char* dest, const char* src) {
+  char* rdest = dest;
+
+  while (*dest)
+    dest++;
+
+  while ((*dest++ = *src++))
+    ;
+
+  return rdest;
+}
+
+char* strncat (char* dest, const char* src, size_t n) {
+  char* ptr = dest;
+  while (*ptr != '\0')
+    ptr++;
+
+  while (n > 0 && *src != '\0') {
+    *ptr++ = *src++;
+    n--;
+  }
+
+  *ptr = '\0';
+  return dest;
+}

kernel/libk/string.h

@@ -10,6 +10,7 @@ size_t strlen (const char* str);
 int memcmp (const void* s1, const void* s2, size_t n);
 int strncmp (const char* s1, const char* s2, size_t n);
 int strcmp (const char* s1, const char* s2);
+char* strncat (char* dest, const char* src, size_t n);
 
 #define strlen_null(x) (strlen ((x)) + 1)