dlls/ntdll/string.c

   1 /*
   2  * NTDLL string functions
   3  *
   4  * Copyright 2000 Alexandre Julliard
   5  * Copyright 2000 Jon Griffiths
   6  * Copyright 2003 Thomas Mertes
   7  *
   8  * This library is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU Lesser General Public
  10  * License as published by the Free Software Foundation; either
  11  * version 2.1 of the License, or (at your option) any later version.
  12  *
  13  * This library is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * Lesser General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU Lesser General Public
  19  * License along with this library; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  21  */
  22
  23 #include "config.h"
  24
  25 #include <ctype.h>
  26 #include <string.h>
  27
  28 #include "windef.h"
  29 #include "winternl.h"
  30
  31
  32 /*********************************************************************
  33  *                  _memicmp   (NTDLL.@)
  34  */
  35 INT __cdecl NTDLL__memicmp( LPCSTR s1, LPCSTR s2, DWORD len )
  36 {
  37     int ret = 0;
  38     while (len--)
  39     {
  40         if ((ret = tolower(*s1) - tolower(*s2))) break;
  41         s1++;
  42         s2++;
  43     }
  44     return ret;
  45 }
  46
  47
  48 /*********************************************************************
  49  *                  _strupr   (NTDLL.@)
  50  */
  51 LPSTR __cdecl _strupr( LPSTR str )
  52 {
  53     LPSTR ret = str;
  54     for ( ; *str; str++) *str = toupper(*str);
  55     return ret;
  56 }
  57
  58
  59 /*********************************************************************
  60  *                  _strlwr   (NTDLL.@)
  61  *
  62  * convert a string in place to lowercase
  63  */
  64 LPSTR __cdecl _strlwr( LPSTR str )
  65 {
  66     LPSTR ret = str;
  67     for ( ; *str; str++) *str = tolower(*str);
  68     return ret;
  69 }
  70
  71
  72 /*********************************************************************
  73  *      _ultoa   (NTDLL.@)
  74  *
  75  * Converts an unsigned long integer to a string.
  76  *
  77  * RETURNS
  78  *  Always returns str.
  79  *
  80  * NOTES
  81  *  Converts value to a '\0' terminated string which is copied to str.
  82  *  The maximum length of the copied str is 33 bytes.
  83  *  Does not check if radix is in the range of 2 to 36.
  84  *  If str is NULL it crashes, as the native function does.
  85  */
  86 char * __cdecl _ultoa(
  87     unsigned long value, /* [I] Value to be converted */
  88     char *str,           /* [O] Destination for the converted value */
  89     int radix)           /* [I] Number base for conversion */
  90 {
  91     char buffer[33];
  92     char *pos;
  93     int digit;
  94
  95     pos = &buffer[32];
  96     *pos = '\0';
  97
  98     do {
  99         digit = value % radix;
 100         value = value / radix;
 101         if (digit < 10) {
 102             *--pos = '0' + digit;
 103         } else {
 104             *--pos = 'a' + digit - 10;
 105         } /* if */
 106     } while (value != 0L);
 107
 108     memcpy(str, pos, &buffer[32] - pos + 1);
 109     return str;
 110 }
 111
 112
 113 /*********************************************************************
 114  *      _ltoa   (NTDLL.@)
 115  *
 116  * Converts a long integer to a string.
 117  *
 118  * RETURNS
 119  *  Always returns str.
 120  *
 121  * NOTES
 122  *  Converts value to a '\0' terminated string which is copied to str.
 123  *  The maximum length of the copied str is 33 bytes. If radix
 124  *  is 10 and value is negative, the value is converted with sign.
 125  *  Does not check if radix is in the range of 2 to 36.
 126  *  If str is NULL it crashes, as the native function does.
 127  */
 128 char * __cdecl _ltoa(
 129     long value, /* [I] Value to be converted */
 130     char *str,  /* [O] Destination for the converted value */
 131     int radix)  /* [I] Number base for conversion */
 132 {
 133     unsigned long val;
 134     int negative;
 135     char buffer[33];
 136     char *pos;
 137     int digit;
 138
 139     if (value < 0 && radix == 10) {
 140         negative = 1;
 141         val = -value;
 142     } else {
 143         negative = 0;
 144         val = value;
 145     } /* if */
 146
 147     pos = &buffer[32];
 148     *pos = '\0';
 149
 150     do {
 151         digit = val % radix;
 152         val = val / radix;
 153         if (digit < 10) {
 154             *--pos = '0' + digit;
 155         } else {
 156             *--pos = 'a' + digit - 10;
 157         } /* if */
 158     } while (val != 0L);
 159
 160     if (negative) {
 161         *--pos = '-';
 162     } /* if */
 163
 164     memcpy(str, pos, &buffer[32] - pos + 1);
 165     return str;
 166 }
 167
 168
 169 /*********************************************************************
 170  *      _itoa    (NTDLL.@)
 171  *
 172  * Converts an integer to a string.
 173  *
 174  * RETURNS
 175  *  Always returns str.
 176  *
 177  * NOTES
 178  *  Converts value to a '\0' terminated string which is copied to str.
 179  *  The maximum length of the copied str is 33 bytes. If radix
 180  *  is 10 and value is negative, the value is converted with sign.
 181  *  Does not check if radix is in the range of 2 to 36.
 182  *  If str is NULL it crashes, as the native function does.
 183  */
 184 char * __cdecl _itoa(
 185     int value, /* [I] Value to be converted */
 186     char *str, /* [O] Destination for the converted value */
 187     int radix) /* [I] Number base for conversion */
 188 {
 189     return _ltoa(value, str, radix);
 190 }
 191
 192
 193 /*********************************************************************
 194  *      _ui64toa   (NTDLL.@)
 195  *
 196  * Converts a large unsigned integer to a string.
 197  *
 198  * RETURNS
 199  *  Always returns str.
 200  *
 201  * NOTES
 202  *  Converts value to a '\0' terminated string which is copied to str.
 203  *  The maximum length of the copied str is 65 bytes.
 204  *  Does not check if radix is in the range of 2 to 36.
 205  *  If str is NULL it crashes, as the native function does.
 206  */
 207 char * __cdecl _ui64toa(
 208     ULONGLONG value, /* [I] Value to be converted */
 209     char *str,       /* [O] Destination for the converted value */
 210     int radix)       /* [I] Number base for conversion */
 211 {
 212     char buffer[65];
 213     char *pos;
 214     int digit;
 215
 216     pos = &buffer[64];
 217     *pos = '\0';
 218
 219     do {
 220         digit = value % radix;
 221         value = value / radix;
 222         if (digit < 10) {
 223             *--pos = '0' + digit;
 224         } else {
 225             *--pos = 'a' + digit - 10;
 226         } /* if */
 227     } while (value != 0L);
 228
 229     memcpy(str, pos, &buffer[64] - pos + 1);
 230     return str;
 231 }
 232
 233
 234 /*********************************************************************
 235  *      _i64toa   (NTDLL.@)
 236  *
 237  * Converts a large integer to a string.
 238  *
 239  * RETURNS
 240  *  Always returns str.
 241  *
 242  * NOTES
 243  *  Converts value to a '\0' terminated string which is copied to str.
 244  *  The maximum length of the copied str is 65 bytes. If radix
 245  *  is 10 and value is negative, the value is converted with sign.
 246  *  Does not check if radix is in the range of 2 to 36.
 247  *  If str is NULL it crashes, as the native function does.
 248  *
 249  * DIFFERENCES
 250  * - The native DLL converts negative values (for base 10) wrong:
 251  *                     -1 is converted to -18446744073709551615
 252  *                     -2 is converted to -18446744073709551614
 253  *   -9223372036854775807 is converted to  -9223372036854775809
 254  *   -9223372036854775808 is converted to  -9223372036854775808
 255  *   The native msvcrt _i64toa function and our ntdll _i64toa function
 256  *   do not have this bug.
 257  */
 258 char * __cdecl _i64toa(
 259     LONGLONG value, /* [I] Value to be converted */
 260     char *str,      /* [O] Destination for the converted value */
 261     int radix)      /* [I] Number base for conversion */
 262 {
 263     ULONGLONG val;
 264     int negative;
 265     char buffer[65];
 266     char *pos;
 267     int digit;
 268
 269     if (value < 0 && radix == 10) {
 270         negative = 1;
 271         val = -value;
 272     } else {
 273         negative = 0;
 274         val = value;
 275     } /* if */
 276
 277     pos = &buffer[64];
 278     *pos = '\0';
 279
 280     do {
 281         digit = val % radix;
 282         val = val / radix;
 283         if (digit < 10) {
 284             *--pos = '0' + digit;
 285         } else {
 286             *--pos = 'a' + digit - 10;
 287         } /* if */
 288     } while (val != 0L);
 289
 290     if (negative) {
 291         *--pos = '-';
 292     } /* if */
 293
 294     memcpy(str, pos, &buffer[64] - pos + 1);
 295     return str;
 296 }
 297
 298
 299 /*********************************************************************
 300  *      _atoi64   (NTDLL.@)
 301  *
 302  * Converts a string to a large integer.
 303  *
 304  * PARAMS
 305  *  str [I] Wstring to be converted
 306  *
 307  * RETURNS
 308  *  On success it returns the integer value otherwise it returns 0.
 309  *
 310  * NOTES
 311  *  Accepts: {whitespace} [+|-] {digits}
 312  *  No check is made for value overflow, only the lower 64 bits are assigned.
 313  *  If str is NULL it crashes, as the native function does.
 314  */
 315 LONGLONG __cdecl _atoi64( char *str )
 316 {
 317     ULONGLONG RunningTotal = 0;
 318     char bMinus = 0;
 319
 320     while (*str == ' ' || (*str >= '\011' && *str <= '\015')) {
 321         str++;
 322     } /* while */
 323
 324     if (*str == '+') {
 325         str++;
 326     } else if (*str == '-') {
 327         bMinus = 1;
 328         str++;
 329     } /* if */
 330
 331     while (*str >= '0' && *str <= '9') {
 332         RunningTotal = RunningTotal * 10 + *str - '0';
 333         str++;
 334     } /* while */
 335
 336     return bMinus ? -RunningTotal : RunningTotal;
 337 }
 338
 339
 340 /*********************************************************************
 341  *              _splitpath (NTDLL.@)
 342  */
 343 void __cdecl _splitpath(const char* inpath, char * drv, char * dir,
 344                         char* fname, char * ext )
 345 {
 346   /* Modified PD code from 'snippets' collection. */
 347   char ch, *ptr, *p;
 348   char pathbuff[MAX_PATH], *path=pathbuff;
 349
 350   strcpy(pathbuff, inpath);
 351
 352   /* convert slashes to backslashes for searching */
 353   for (ptr = (char*)path; *ptr; ++ptr)
 354     if ('/' == *ptr)
 355       *ptr = '\\';
 356
 357   /* look for drive spec */
 358   if ('\0' != (ptr = strchr(path, ':')))
 359   {
 360     ++ptr;
 361     if (drv)
 362     {
 363       strncpy(drv, path, ptr - path);
 364       drv[ptr - path] = '\0';
 365     }
 366     path = ptr;
 367   }
 368   else if (drv)
 369     *drv = '\0';
 370
 371   /* find rightmost backslash or leftmost colon */
 372   if (NULL == (ptr = strrchr(path, '\\')))
 373     ptr = (strchr(path, ':'));
 374
 375   if (!ptr)
 376   {
 377     ptr = (char *)path; /* no path */
 378     if (dir)
 379       *dir = '\0';
 380   }
 381   else
 382   {
 383     ++ptr; /* skip the delimiter */
 384     if (dir)
 385     {
 386       ch = *ptr;
 387       *ptr = '\0';
 388       strcpy(dir, path);
 389       *ptr = ch;
 390     }
 391   }
 392
 393   if (NULL == (p = strrchr(ptr, '.')))
 394   {
 395     if (fname)
 396       strcpy(fname, ptr);
 397     if (ext)
 398       *ext = '\0';
 399   }
 400   else
 401   {
 402     *p = '\0';
 403     if (fname)
 404       strcpy(fname, ptr);
 405     *p = '.';
 406     if (ext)
 407       strcpy(ext, p);
 408   }
 409
 410   /* Fix pathological case - Win returns ':' as part of the
 411    * directory when no drive letter is given.
 412    */
 413   if (drv && drv[0] == ':')
 414   {
 415     *drv = '\0';
 416     if (dir)
 417     {
 418       pathbuff[0] = ':';
 419       pathbuff[1] = '\0';
 420       strcat(pathbuff,dir);
 421       strcpy(dir,pathbuff);
 422     }
 423   }
 424 }