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/*
* $Id$
*
* Copyright (C) 2003 Red Hat, Inc.
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* Original Author: Adrian Havill <havill@redhat.com>
*
* Contributors:
*/
#include <limits.h> // INT_MIN, ULONG_MAX, LONG_MIN
#include "wlite_config.h" // wchar_t, NULL, size_t
#include "wlite_wchar.h" // prototypes
#include "wlite_wctype.h"
static wlite_wint_t
next_char(const wchar_t **s) {
wlite_wint_t c = **s;
#if WLITE_EXTENSIONS
while (c != L'\0') {
if (!wlite_iswctype(c, wlite_ignore_)) break;
c = *++*s;
}
#endif
if (c != L'\0') {
++*s;
c = wlite_towctrans(c, wlite_tolower_);
#if WLITE_EXTENSIONS
c = wlite_towctrans(c, wlite_tocase_);
c = wlite_towctrans(c, wlite_tonorm_);
#endif
}
return c;
}
long long
wlite_widetoll_(const wchar_t *s, wchar_t **endptr, unsigned base) {
static const wchar_t *const valid = L"0123456789abcdefghijklmnopqrstuvwxyz";
const size_t base_max = 36;
const wchar_t *ptr = s, *digit, *start;
wlite_wint_t c;
wchar_t sign;
long long i = 0;
do {
c = next_char(&ptr);
if (c == L'\0') break;
} while (wlite_iswctype(c, wlite_space_));
if (c != L'-' && c != L'+') {
if (ptr != s) {
--ptr;
}
sign = L'+';
}
else sign = c;
if (base > base_max) {
if (endptr) {
*endptr = (wchar_t *) s;
}
return 0;
}
else if (base != 0) {
if (base == 16 && ptr[0] == L'0' && (ptr[1] == L'x')) {
ptr += 2;
}
}
else {
if (ptr[0] != L'0') {
base = 10;
}
else if (ptr[1] == L'x') {
base = 16;
ptr += 2;
}
else base = 8;
}
start = ptr;
while ((digit = wlite_wmemchr(valid, c = next_char(&ptr), base)) != NULL) {
i *= base;
i += (unsigned) (digit - valid);
if ((i > ULONG_MAX) || (i < LONG_MIN)) break;
}
if (start == ptr) {
if (endptr != NULL) {
*endptr = (wchar_t *) s;
}
return 0;
}
if (sign == L'-') {
i = -i;
}
if (endptr != NULL) {
if (digit == NULL && c != L'\0') {
ptr--;
}
*endptr = (wchar_t *) ptr;
}
return i;
}
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