src/system/libroot/posix/string/strndup.cpp

   1 /*
   2  * Copyright 2009, Axel Dörfler, axeld@pinc-software.de.
   3  * Distributed under the terms of the MIT License.
   4  */
   5
   6
   7 #include <string.h>
   8 #include <stdlib.h>
   9
  10
  11 extern "C" char*
  12 strndup(const char* string, size_t size)
  13 {
  14         // While POSIX does not mention it, we handle NULL pointers gracefully
  15         if (string == NULL)
  16                 return NULL;
  17
  18         size_t length = strlen(string);
  19         if (length > size)
  20                 length = size;
  21
  22         char* copied = (char*)malloc(length + 1);
  23         if (copied == NULL)
  24                 return NULL;
  25
  26         memcpy(copied, string, length);
  27         copied[length] = '\0';
  28
  29         return copied;
  30 }