locale/wcstoimax-fbsd.c

   1 /*-
   2  * Copyright (c) 1992, 1993
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35 #if 0
  36 #if defined(LIBC_SCCS) && !defined(lint)
  37 static char sccsid[] = "from @(#)strtol.c       8.1 (Berkeley) 6/4/93";
  38 #endif /* LIBC_SCCS and not lint */
  39 __FBSDID("FreeBSD: src/lib/libc/stdlib/strtoimax.c,v 1.8 2002/09/06 11:23:59 tjr Exp ");
  40 #endif
  41 __FBSDID("$FreeBSD: src/lib/libc/locale/wcstoimax.c,v 1.2 2003/01/01 18:48:43 schweikh Exp $");
  42
  43 #include "xlocale_private.h"
  44
  45 #include <errno.h>
  46 #include <inttypes.h>
  47 #include <stdlib.h>
  48 #include <wchar.h>
  49 #include <wctype.h>
  50
  51 /*
  52  * Convert a wide character string to an intmax_t integer.
  53  */
  54 intmax_t
  55 wcstoimax_l(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
  56     int base, locale_t loc)
  57 {
  58         const wchar_t *s;
  59         uintmax_t acc;
  60         wchar_t c;
  61         uintmax_t cutoff;
  62         int neg, any, cutlim;
  63
  64         NORMALIZE_LOCALE(loc);
  65         /*
  66          * See strtoimax for comments as to the logic used.
  67          */
  68         s = nptr;
  69         do {
  70                 c = *s++;
  71         } while (iswspace_l(c, loc));
  72         if (c == L'-') {
  73                 neg = 1;
  74                 c = *s++;
  75         } else {
  76                 neg = 0;
  77                 if (c == L'+')
  78                         c = *s++;
  79         }
  80         if ((base == 0 || base == 16) &&
  81             c == L'0' && (*s == L'x' || *s == L'X')) {
  82                 c = s[1];
  83                 s += 2;
  84                 base = 16;
  85         }
  86         if (base == 0)
  87                 base = c == L'0' ? 8 : 10;
  88         acc = any = 0;
  89         if (base < 2 || base > 36)
  90                 goto noconv;
  91
  92         cutoff = neg ? (uintmax_t)-(INTMAX_MIN + INTMAX_MAX) + INTMAX_MAX
  93             : INTMAX_MAX;
  94         cutlim = cutoff % base;
  95         cutoff /= base;
  96         for ( ; ; c = *s++) {
  97 #ifdef notyet
  98                 if (iswdigit_l(c, loc))
  99                         c = digittoint_l(c, loc);
 100                 else
 101 #endif
 102                 if (c >= L'0' && c <= L'9')
 103                         c -= L'0';
 104                 else if (c >= L'A' && c <= L'Z')
 105                         c -= L'A' - 10;
 106                 else if (c >= 'a' && c <= 'z')
 107                         c -= L'a' - 10;
 108                 else
 109                         break;
 110                 if (c >= base)
 111                         break;
 112                 if (any < 0 || acc > cutoff || (acc == cutoff && c > cutlim))
 113                         any = -1;
 114                 else {
 115                         any = 1;
 116                         acc *= base;
 117                         acc += c;
 118                 }
 119         }
 120         if (any < 0) {
 121                 acc = neg ? INTMAX_MIN : INTMAX_MAX;
 122                 errno = ERANGE;
 123         } else if (!any) {
 124 noconv:
 125                 errno = EINVAL;
 126         } else if (neg)
 127                 acc = -acc;
 128         if (endptr != NULL)
 129                 *endptr = (wchar_t *)(any ? s - 1 : nptr);
 130         return (acc);
 131 }
 132
 133 intmax_t
 134 wcstoimax(const wchar_t * __restrict nptr, wchar_t ** __restrict endptr,
 135     int base)
 136 {
 137         return wcstoimax_l(nptr, endptr, base, __current_locale());
 138 }