reactos/lib/msvcrt/mbstring/mbsncat.c

   1 /*
   2  * COPYRIGHT:   See COPYING in the top level directory
   3  * PROJECT:     ReactOS system libraries
   4  * FILE:        lib/msvcrt/mbstring/mbsncat.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 unsigned char * _mbsncat(unsigned char *dst, const unsigned char *src, size_t n)
  17 {
  18         char *d = (char *)dst;
  19         char *s = (char *)src;
  20         if (n != 0) {
  21                 d = dst + strlen(dst); // get the end of string
  22                 d += _mbclen2(*d); // move 1 or 2 up
  23
  24                 do {
  25                         if ((*d++ = *s++) == 0)
  26                         {
  27                                 while (--n != 0)
  28                                         *d++ = 0;
  29                                 break;
  30                         }
  31                         if (!_ismbblead(*s) )
  32                                 n--;
  33                 } while (n > 0);
  34         }
  35         return dst;
  36 }
  37
  38 unsigned char * _mbsnbcat(unsigned char *dst, const unsigned char *src, size_t n)
  39 {
  40         char *d;
  41         char *s = (char *)src;
  42         if (n != 0) {
  43                 d = dst + strlen(dst); // get the end of string
  44                 d += _mbclen2(*d); // move 1 or 2 up
  45
  46                 do {
  47                         if ((*d++ = *s++) == 0)
  48                         {
  49                                 while (--n != 0)
  50                                         *d++ = 0;
  51                                 break;
  52                         }
  53                         if ( !(n==1 && _ismbblead(*s)) )
  54                                 n--;
  55                 } while (n > 0);
  56         }
  57         return dst;
  58 }
  59