scintilla/lexlib/StringCopy.h

   1 // Scintilla source code edit control
   2 /** @file StringCopy.h
   3  ** Safe string copy function which always NUL terminates.
   4  ** ELEMENTS macro for determining array sizes.
   5  **/
   6 // Copyright 2013 by Neil Hodgson <neilh@scintilla.org>
   7 // The License.txt file describes the conditions under which this software may be distributed.
   8
   9 #ifndef STRINGCOPY_H
  10 #define STRINGCOPY_H
  11
  12 namespace Scintilla {
  13
  14 // Safer version of string copy functions like strcpy, wcsncpy, etc.
  15 // Instantiate over fixed length strings of both char and wchar_t.
  16 // May truncate if source doesn't fit into dest with room for NUL.
  17
  18 template <typename T, size_t count>
  19 void StringCopy(T (&dest)[count], const T* source) {
  20         for (size_t i=0; i<count; i++) {
  21                 dest[i] = source[i];
  22                 if (!source[i])
  23                         break;
  24         }
  25         dest[count-1] = 0;
  26 }
  27
  28 #define ELEMENTS(a) (sizeof(a) / sizeof(a[0]))
  29
  30 }
  31
  32 #endif