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., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
  22  */
  23
  24 #define _ISOC99_SOURCE
  25 #include "config.h"
  26
  27 #include <stdlib.h>
  28 #include <errno.h>
  29 #include "msvcrt.h"
  30 #include "wine/debug.h"
  31
  32 WINE_DEFAULT_DEBUG_CHANNEL(msvcrt);
  33
  34 /*********************************************************************
  35  *              _mbsdup (MSVCRT.@)
  36  *              _strdup (MSVCRT.@)
  37  */
  38 char* CDECL _strdup(const char* str)
  39 {
  40     if(str)
  41     {
  42       char * ret = MSVCRT_malloc(strlen(str)+1);
  43       if (ret) strcpy( ret, str );
  44       return ret;
  45     }
  46     else return 0;
  47 }
  48
  49 /*********************************************************************
  50  *              _strnset (MSVCRT.@)
  51  */
  52 char* CDECL _strnset(char* str, int value, MSVCRT_size_t len)
  53 {
  54   if (len > 0 && str)
  55     while (*str && len--)
  56       *str++ = value;
  57   return str;
  58 }
  59
  60 /*********************************************************************
  61  *              _strrev (MSVCRT.@)
  62  */
  63 char* CDECL _strrev(char* str)
  64 {
  65   char * p1;
  66   char * p2;
  67
  68   if (str && *str)
  69     for (p1 = str, p2 = str + strlen(str) - 1; p2 > p1; ++p1, --p2)
  70     {
  71       *p1 ^= *p2;
  72       *p2 ^= *p1;
  73       *p1 ^= *p2;
  74     }
  75
  76   return str;
  77 }
  78
  79 /*********************************************************************
  80  *              _strset (MSVCRT.@)
  81  */
  82 char* CDECL _strset(char* str, int value)
  83 {
  84   char *ptr = str;
  85   while (*ptr)
  86     *ptr++ = value;
  87
  88   return str;
  89 }
  90
  91 /*********************************************************************
  92  *              strtok  (MSVCRT.@)
  93  */
  94 char * CDECL MSVCRT_strtok( char *str, const char *delim )
  95 {
  96     thread_data_t *data = msvcrt_get_thread_data();
  97     char *ret;
  98
  99     if (!str)
 100         if (!(str = data->strtok_next)) return NULL;
 101
 102     while (*str && strchr( delim, *str )) str++;
 103     if (!*str) return NULL;
 104     ret = str++;
 105     while (*str && !strchr( delim, *str )) str++;
 106     if (*str) *str++ = 0;
 107     data->strtok_next = str;
 108     return ret;
 109 }
 110
 111
 112 /*********************************************************************
 113  *              _swab (MSVCRT.@)
 114  */
 115 void CDECL MSVCRT__swab(char* src, char* dst, int len)
 116 {
 117   if (len > 1)
 118   {
 119     len = (unsigned)len >> 1;
 120
 121     while (len--) {
 122       char s0 = src[0];
 123       char s1 = src[1];
 124       *dst++ = s1;
 125       *dst++ = s0;
 126       src = src + 2;
 127     }
 128   }
 129 }
 130
 131 /*********************************************************************
 132  *              atof  (MSVCRT.@)
 133  */
 134 double CDECL MSVCRT_atof( const char *str )
 135 {
 136     return atof( str );
 137 }
 138
 139 /*********************************************************************
 140  *              strtod  (MSVCRT.@)
 141  */
 142 double CDECL MSVCRT_strtod( const char *str, char **end )
 143 {
 144     return strtod( str, end );
 145 }
 146
 147 /*********************************************************************
 148  *              strcoll (MSVCRT.@)
 149  */
 150 int CDECL MSVCRT_strcoll( const char* str1, const char* str2 )
 151 {
 152     /* FIXME: handle Windows locale */
 153     return strcoll( str1, str2 );
 154 }
 155
 156 /*********************************************************************
 157  *      strcpy_s (MSVCRT.@)
 158  */
 159 int CDECL MSVCRT_strcpy_s( char* dst, MSVCRT_size_t elem, const char* src )
 160 {
 161     MSVCRT_size_t i;
 162     if(!elem) return MSVCRT_EINVAL;
 163     if(!dst) return MSVCRT_EINVAL;
 164     if(!src)
 165     {
 166         dst[0] = '\0';
 167         return MSVCRT_EINVAL;
 168     }
 169
 170     for(i = 0; i < elem; i++)
 171     {
 172         if((dst[i] = src[i]) == '\0') return 0;
 173     }
 174     dst[0] = '\0';
 175     return MSVCRT_ERANGE;
 176 }
 177
 178 /*********************************************************************
 179  *      strcat_s (MSVCRT.@)
 180  */
 181 int CDECL MSVCRT_strcat_s( char* dst, MSVCRT_size_t elem, const char* src )
 182 {
 183     MSVCRT_size_t i, j;
 184     if(!dst) return MSVCRT_EINVAL;
 185     if(elem == 0) return MSVCRT_EINVAL;
 186     if(!src)
 187     {
 188         dst[0] = '\0';
 189         return MSVCRT_EINVAL;
 190     }
 191
 192     for(i = 0; i < elem; i++)
 193     {
 194         if(dst[i] == '\0')
 195         {
 196             for(j = 0; (j + i) < elem; j++)
 197             {
 198                 if((dst[j + i] = src[j]) == '\0') return 0;
 199             }
 200         }
 201     }
 202     /* Set the first element to 0, not the first element after the skipped part */
 203     dst[0] = '\0';
 204     return MSVCRT_ERANGE;
 205 }
 206
 207 /*********************************************************************
 208  *              strxfrm (MSVCRT.@)
 209  */
 210 MSVCRT_size_t CDECL MSVCRT_strxfrm( char *dest, const char *src, MSVCRT_size_t len )
 211 {
 212     /* FIXME: handle Windows locale */
 213     return strxfrm( dest, src, len );
 214 }
 215
 216 /*********************************************************************
 217  *              _stricoll (MSVCRT.@)
 218  */
 219 int CDECL MSVCRT__stricoll( const char* str1, const char* str2 )
 220 {
 221   /* FIXME: handle collates */
 222   TRACE("str1 %s str2 %s\n", debugstr_a(str1), debugstr_a(str2));
 223   return lstrcmpiA( str1, str2 );
 224 }
 225
 226 /********************************************************************
 227  *              _atoldbl (MSVCRT.@)
 228  */
 229 int CDECL MSVCRT__atoldbl(MSVCRT__LDOUBLE *value, const char *str)
 230 {
 231   /* FIXME needs error checking for huge/small values */
 232 #ifdef HAVE_STRTOLD
 233   TRACE("str %s value %p\n",str,value);
 234   value->x = strtold(str,0);
 235 #else
 236   FIXME("stub, str %s value %p\n",str,value);
 237 #endif
 238   return 0;
 239 }
 240
 241 /********************************************************************
 242  *              __STRINGTOLD (MSVCRT.@)
 243  */
 244 int CDECL __STRINGTOLD( MSVCRT__LDOUBLE *value, char **endptr, const char *str, int flags )
 245 {
 246 #ifdef HAVE_STRTOLD
 247     FIXME("%p %p %s %x partial stub\n", value, endptr, str, flags );
 248     value->x = strtold(str,endptr);
 249 #else
 250     FIXME("%p %p %s %x stub\n", value, endptr, str, flags );
 251 #endif
 252     return 0;
 253 }
 254
 255 /******************************************************************
 256  *              strtol (MSVCRT.@)
 257  */
 258 MSVCRT_long CDECL MSVCRT_strtol(const char* nptr, char** end, int base)
 259 {
 260     /* wrapper to forward libc error code to msvcrt's error codes */
 261     long ret;
 262
 263     errno = 0;
 264     ret = strtol(nptr, end, base);
 265     switch (errno)
 266     {
 267     case ERANGE:        *MSVCRT__errno() = MSVCRT_ERANGE;       break;
 268     case EINVAL:        *MSVCRT__errno() = MSVCRT_EINVAL;       break;
 269     default:
 270         /* cope with the fact that we may use 64bit long integers on libc
 271          * while msvcrt always uses 32bit long integers
 272          */
 273         if (ret > MSVCRT_LONG_MAX)
 274         {
 275             ret = MSVCRT_LONG_MAX;
 276             *MSVCRT__errno() = MSVCRT_ERANGE;
 277         }
 278         else if (ret < -MSVCRT_LONG_MAX - 1)
 279         {
 280             ret = -MSVCRT_LONG_MAX - 1;
 281             *MSVCRT__errno() = MSVCRT_ERANGE;
 282         }
 283         break;
 284     }
 285
 286     return ret;
 287 }
 288
 289 /******************************************************************
 290  *              strtoul (MSVCRT.@)
 291  */
 292 MSVCRT_ulong CDECL MSVCRT_strtoul(const char* nptr, char** end, int base)
 293 {
 294     /* wrapper to forward libc error code to msvcrt's error codes */
 295     unsigned long ret;
 296
 297     errno = 0;
 298     ret = strtoul(nptr, end, base);
 299     switch (errno)
 300     {
 301     case ERANGE:        *MSVCRT__errno() = MSVCRT_ERANGE;       break;
 302     case EINVAL:        *MSVCRT__errno() = MSVCRT_EINVAL;       break;
 303     default:
 304         /* cope with the fact that we may use 64bit long integers on libc
 305          * while msvcrt always uses 32bit long integers
 306          */
 307         if (ret > MSVCRT_ULONG_MAX)
 308         {
 309             ret = MSVCRT_ULONG_MAX;
 310             *MSVCRT__errno() = MSVCRT_ERANGE;
 311         }
 312         break;
 313     }
 314
 315     return ret;
 316 }