/*-
 * Copyright (c) 1990, 1993
 *      The Regents of the University of California.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 * Original version ID:
 * $NetBSD: src/lib/libc/locale/_wcstoul.h,v 1.2 2003/08/07 16:43:03 agc Exp $
 */

#define _LOCALE_NAME(func) func ## _l
#define _MAKE_LOCALE_NAME(func) _LOCALE_NAME(func)
#define _FUNCNAME_L _MAKE_LOCALE_NAME(_FUNCNAME)

/*
 * function template for strtoul, strtoull and strtoumax.
 *
 * parameters:
 *      _FUNCNAME  : function name
 *      __UINT     : return type
 *      __UINT_MAX : upper limit of the return type
 */

__UINT
_FUNCNAME_L(const char * __restrict nptr, char ** __restrict endptr, int base,
                locale_t locale)
{
        const char *s;
        __UINT acc, cutoff;
        char c;
        int i, neg, any, cutlim;

        _DIAGASSERT(nptr != NULL);
        /* endptr may be NULL */

        FIX_LOCALE(locale);

        /* check base value */
        if (base && (base < 2 || base > 36)) {
                errno = EINVAL;
                return(0);
        }

        /*
         * Skip white space and pick up leading +/- sign if any.
         * If base is 0, allow 0x for hex and 0 for octal, else
         * assume decimal; if base is already 16, allow 0x.
         */
        s = nptr;
        do {
                c = *s++;
        } while (isspace_l((unsigned char)c, locale));
        if (c == '-') {
                neg = 1;
                c = *s++;
        } else {
                neg = 0;
                if (c == '+')
                        c = *s++;
        }
        if ((base == 0 || base == 16) &&
            c == '0' &&
            (*s == 'x' || *s == 'X') &&
            isxdigit_l((unsigned char)s[1], locale))
        {
                c = s[1];
                s += 2;
                base = 16;
        }
        if (base == 0)
                base = c == '0' ? 8 : 10;

        /*
         * See strtol for comments as to the logic used.
         */
        cutoff = __UINT_MAX / (__UINT)base;
        cutlim = (int)(__UINT_MAX % (__UINT)base);
        for (acc = 0, any = 0;; c = *s++) {
                if (!isascii(c))
                        break;
                if (isdigit(c))
                        i = c - '0';
                else if (isalpha(c))
                        i = c - (isupper(c) ? 'A' - 10 : 'a' - 10);
                else
                        break;
                if (i >= base)
                        break;
                if (any < 0)
                        continue;
                if (acc > cutoff || (acc == cutoff && i > cutlim)) {
                        any = -1;
                        acc = __UINT_MAX;
                        errno = ERANGE;
                } else {
                        any = 1;
                        acc *= (__UINT)base;
                        acc += i;
                }
        }
        if (neg && any > 0)
                acc = -acc;
        if (endptr != NULL)
                /* LINTED interface specification */
                *endptr = __DECONST(char *, (any ? s - 1 : nptr));
        return(acc);
}


__UINT
_FUNCNAME(const char * __restrict nptr, char ** __restrict endptr, int base)
{
        return _FUNCNAME_L(nptr, endptr, base, __get_locale());
}