diff options
Diffstat (limited to 'lib/libc/locale/_wcstol.h')
| -rw-r--r-- | lib/libc/locale/_wcstol.h | 136 |
1 files changed, 136 insertions, 0 deletions
diff --git a/lib/libc/locale/_wcstol.h b/lib/libc/locale/_wcstol.h new file mode 100644 index 00000000000..7b49bbff27a --- /dev/null +++ b/lib/libc/locale/_wcstol.h @@ -0,0 +1,136 @@ +/* $OpenBSD: _wcstol.h,v 1.1 2005/07/01 08:59:27 espie Exp $ */ +/* $NetBSD: _wcstol.h,v 1.2 2003/08/07 16:43:03 agc Exp $ */ + +/*- + * 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: + * @(#)strtol.c 8.1 (Berkeley) 6/4/93 + * NetBSD: wcstol.c,v 1.1 2001/09/27 16:30:36 yamt Exp + * Citrus: xpg4dl/FreeBSD/lib/libc/locale/wcstol.c,v 1.2 2001/09/21 16:11:41 yamt Exp + */ + +/* + * function template for wcstol, wcstoll and wcstoimax. + * + * parameters: + * FUNCNAME : function name + * int_type : return type + * MIN_VALUE : lower limit of the return type + * MAX_VALUE : upper limit of the return type + */ + +int_type +FUNCNAME(const wchar_t *nptr, wchar_t **endptr, int base) +{ + const wchar_t *s; + int_type acc, cutoff; + wint_t wc; + int i; + int neg, any, cutlim; + + /* 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 { + wc = (wchar_t) *s++; + } while (iswspace(wc)); + if (wc == L'-') { + neg = 1; + wc = *s++; + } else { + neg = 0; + if (wc == L'+') + wc = *s++; + } + if ((base == 0 || base == 16) && + wc == L'0' && (*s == L'x' || *s == L'X')) { + wc = s[1]; + s += 2; + base = 16; + } + if (base == 0) + base = wc == L'0' ? 8 : 10; + + /* + * See strtol for comments as to the logic used. + */ + cutoff = neg ? MIN_VALUE : MAX_VALUE; + cutlim = (int)(cutoff % base); + cutoff /= base; + if (neg) { + if (cutlim > 0) { + cutlim -= base; + cutoff += 1; + } + cutlim = -cutlim; + } + for (acc = 0, any = 0;; wc = (wchar_t) *s++) { + i = wctoint(wc); + if (i == -1) + break; + if (i >= base) + break; + if (any < 0) + continue; + if (neg) { + if (acc < cutoff || (acc == cutoff && i > cutlim)) { + any = -1; + acc = MIN_VALUE; + errno = ERANGE; + } else { + any = 1; + acc *= base; + acc -= i; + } + } else { + if (acc > cutoff || (acc == cutoff && i > cutlim)) { + any = -1; + acc = MAX_VALUE; + errno = ERANGE; + } else { + any = 1; + acc *= base; + acc += i; + } + } + } + if (endptr != 0) + /* LINTED interface specification */ + *endptr = (wchar_t *)(any ? s - 1 : nptr); + return (acc); +} |