dlls/msvcrt/string.c

   1 /*
   2  * MSVCRT string functions
   3  *
   4  * Copyright 1996,1998 Marcus Meissner
   5  * Copyright 1996 Jukka Iivonen
   6  * Copyright 1997,2000 Uwe Bonnes
   7  * Copyright 2000 Jon Griffiths
   8  *
   9  * This library is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU Lesser General Public
  11  * License as published by the Free Software Foundation; either
  12  * version 2.1 of the License, or (at your option) any later version.
  13  *
  14  * This library is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  17  * Lesser General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU Lesser General Public
  20  * License along with this library; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  22  */
  23
  24 #include "msvcrt.h"
  25 #include "wine/debug.h"
  26
  27 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
  28
  29 /* INTERNAL: MSVCRT_malloc() based strndup */
  30 char* msvcrt_strndup(const char* buf, unsigned int size)
  31 {
  32   char* ret;
  33   unsigned int len = strlen(buf), max_len;
  34
  35   max_len = size <= len? size : len + 1;
  36
  37   ret = MSVCRT_malloc(max_len);
  38   if (ret)
  39   {
  40     memcpy(ret,buf,max_len);
  41     ret[max_len] = 0;
  42   }
  43   return ret;
  44 }
  45
  46 /*********************************************************************
  47  *              _mbsdup (MSVCRT.@)
  48  *              _strdup (MSVCRT.@)
  49  */
  50 char* _strdup(const char* str)
  51 {
  52     char * ret = MSVCRT_malloc(strlen(str)+1);
  53     if (ret) strcpy( ret, str );
  54     return ret;
  55 }
  56
  57 /*********************************************************************
  58  *              _strnset (MSVCRT.@)
  59  */
  60 char* _strnset(char* str, int value, unsigned int len)
  61 {
  62   if (len > 0 && str)
  63     while (*str && len--)
  64       *str++ = value;
  65   return str;
  66 }
  67
  68 /*********************************************************************
  69  *              _strrev (MSVCRT.@)
  70  */
  71 char* _strrev(char* str)
  72 {
  73   char * p1;
  74   char * p2;
  75
  76   if (str && *str)
  77     for (p1 = str, p2 = str + strlen(str) - 1; p2 > p1; ++p1, --p2)
  78     {
  79       *p1 ^= *p2;
  80       *p2 ^= *p1;
  81       *p1 ^= *p2;
  82     }
  83
  84   return str;
  85 }
  86
  87 /*********************************************************************
  88  *              _strset (MSVCRT.@)
  89  */
  90 char* _strset(char* str, int value)
  91 {
  92   char *ptr = str;
  93   while (*ptr)
  94     *ptr++ = value;
  95
  96   return str;
  97 }
  98
  99 /*********************************************************************
 100  *              _swab (MSVCRT.@)
 101  */
 102 void MSVCRT__swab(char* src, char* dst, int len)
 103 {
 104   if (len > 1)
 105   {
 106     len = (unsigned)len >> 1;
 107
 108     while (len--) {
 109       *dst++ = src[1];
 110       *dst++ = *src++;
 111       src++;
 112     }
 113   }
 114 }