lib/ntdll/string/wstring.c

   1 /* $Id$
   2  *
   3  * COPYRIGHT:       See COPYING in the top level directory
   4  * PROJECT:         ReactOS kernel
   5  * FILE:            lib/ntdll/string/wstring.c
   6  * PURPOSE:         Wide string functions
   7  * PROGRAMMER:      David Welch (welch@mcmail.com)
   8  * UPDATE HISTORY:
   9  *                  Created 22/05/98
  10  *   1998/12/04  RJJ  Cleaned up and added i386 def checks
  11  */
  12
  13 /* INCLUDES *****************************************************************/
  14
  15 #include <ddk/ntddk.h>
  16 #include <wchar.h>
  17
  18
  19 /* FUNCTIONS *****************************************************************/
  20
  21 int _wcsicmp (const wchar_t* cs, const wchar_t * ct)
  22 {
  23         while (towlower(*cs) == towlower(*ct))
  24         {
  25                 if (*cs == 0)
  26                         return 0;
  27                 cs++;
  28                 ct++;
  29         }
  30         return towlower(*cs) - towlower(*ct);
  31 }
  32
  33
  34 /*
  35  * @implemented
  36  */
  37 wchar_t *_wcslwr (wchar_t *x)
  38 {
  39         wchar_t *y=x;
  40
  41         while (*y) {
  42                 *y=towlower(*y);
  43                 y++;
  44         }
  45         return x;
  46 }
  47
  48
  49 /*
  50  * @implemented
  51  */
  52 int _wcsnicmp (const wchar_t * cs, const wchar_t * ct, size_t count)
  53 {
  54         if (count == 0)
  55                 return 0;
  56         do {
  57                 if (towupper(*cs) != towupper(*ct++))
  58                         return towupper(*cs) - towupper(*--ct);
  59                 if (*cs++ == 0)
  60                         break;
  61         } while (--count != 0);
  62         return 0;
  63 }
  64
  65
  66 /*
  67  * @implemented
  68  */
  69 wchar_t *_wcsupr(wchar_t *x)
  70 {
  71         wchar_t  *y=x;
  72
  73         while (*y) {
  74                 *y=towupper(*y);
  75                 y++;
  76         }
  77         return x;
  78 }
  79
  80 /*
  81  * @implemented
  82  */
  83 size_t wcscspn(const wchar_t *str,const wchar_t *reject)
  84 {
  85         wchar_t *s;
  86         wchar_t *t;
  87         s=(wchar_t *)str;
  88         do {
  89                 t=(wchar_t *)reject;
  90                 while (*t) {
  91                         if (*t==*s)
  92                                 break;
  93                         t++;
  94                 }
  95                 if (*t)
  96                         break;
  97                 s++;
  98         } while (*s);
  99         return s-str; /* nr of wchars */
 100 }
 101
 102 /*
 103  * @implemented
 104  */
 105 wchar_t *wcspbrk(const wchar_t *s1, const wchar_t *s2)
 106 {
 107   const wchar_t *scanp;
 108   int c, sc;
 109
 110   while ((c = *s1++) != 0)
 111   {
 112     for (scanp = s2; (sc = *scanp++) != 0;)
 113       if (sc == c)
 114       {
 115         return (wchar_t *)(--s1);
 116       }
 117   }
 118   return 0;
 119 }
 120
 121 /*
 122  * @implemented
 123  */
 124 size_t wcsspn(const wchar_t *str,const wchar_t *accept)
 125 {
 126         wchar_t  *s;
 127         wchar_t  *t;
 128         s=(wchar_t *)str;
 129         do {
 130                 t=(wchar_t *)accept;
 131                 while (*t) {
 132                         if (*t==*s)
 133                                 break;
 134                         t++;
 135                 }
 136                 if (!*t)
 137                         break;
 138                 s++;
 139         } while (*s);
 140         return s-str; /* nr of wchars */
 141 }
 142
 143
 144 /*
 145  * @implemented
 146  */
 147 wchar_t *wcsstr(const wchar_t *s,const wchar_t *b)
 148 {
 149         wchar_t *x;
 150         wchar_t *y;
 151         wchar_t *c;
 152         x=(wchar_t *)s;
 153         while (*x) {
 154                 if (*x==*b) {
 155                         y=x;
 156                         c=(wchar_t *)b;
 157                         while (*y && *c && *y==*c) {
 158                                 c++;
 159                                 y++;
 160                         }
 161                         if (!*c)
 162                                 return x;
 163                 }
 164                 x++;
 165         }
 166         return NULL;
 167 }
 168
 169 /* EOF */