lib/crtdll/mbstring/mbsncat.c

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS system libraries
   4  * FILE:        lib/crtdll/mbstring/mbsset.c
   5  * PURPOSE:     Concatenate two multi byte string to maximum of n characters or bytes
   6  * PROGRAMER:   Boudewijn Dekker
   7  * UPDATE HISTORY:
   8  *              12/04/99: Created
   9  */
  10
  11 #include <msvcrt/mbstring.h>
  12 #include <msvcrt/string.h>
  13
  14 size_t _mbclen2(const unsigned int s);
  15
  16 /*
  17  * @implemented
  18  */
  19 unsigned char * _mbsncat(unsigned char *dst, const unsigned char *src, size_t n)
  20 {
  21         char *d = (char *)dst;
  22         char *s = (char *)src;
  23         if (n != 0) {
  24                 d = dst + strlen(dst); // get the end of string
  25                 d += _mbclen2(*d); // move 1 or 2 up
  26
  27                 do {
  28                         if ((*d++ = *s++) == 0)
  29                         {
  30                                 while (--n != 0)
  31                                         *d++ = 0;
  32                                 break;
  33                         }
  34                         if (!_ismbblead(*s) )
  35                                 n--;
  36                 } while (n > 0);
  37         }
  38         return dst;
  39 }
  40
  41 /*
  42  * @implemented
  43  */
  44 unsigned char * _mbsnbcat(unsigned char *dst, const unsigned char *src, size_t n)
  45 {
  46         char *d;
  47         char *s = (char *)src;
  48         if (n != 0) {
  49                 d = dst + strlen(dst); // get the end of string
  50                 d += _mbclen2(*d); // move 1 or 2 up
  51
  52                 do {
  53                         if ((*d++ = *s++) == 0)
  54                         {
  55                                 while (--n != 0)
  56                                         *d++ = 0;
  57                                 break;
  58                         }
  59                         if ( !(n==1 && _ismbblead(*s)) )
  60                                 n--;
  61                 } while (n > 0);
  62         }
  63         return dst;
  64 }