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_strtoi.h revision 1.1.1.1 
      1 /*	$NetBSD: _strtoi.h,v 1.1.1.1 2020/06/15 01:52:53 christos Exp $	*/
      2 
      3 /*-
      4  * Copyright (c) 1990, 1993
      5  *	The Regents of the University of California.  All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  * 3. Neither the name of the University nor the names of its contributors
     16  *    may be used to endorse or promote products derived from this software
     17  *    without specific prior written permission.
     18  *
     19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     29  * SUCH DAMAGE.
     30  *
     31  * Original version ID:
     32  * NetBSD: src/lib/libc/locale/_wcstoul.h,v 1.2 2003/08/07 16:43:03 agc Exp
     33  *
     34  * Created by Kamil Rytarowski, based on ID:
     35  * NetBSD: src/common/lib/libc/stdlib/_strtoul.h,v 1.7 2013/05/17 12:55:56 joerg Exp
     36  */
     37 
     38 /*
     39  * function template for strtoi and strtou
     40  *
     41  * parameters:
     42  *	_FUNCNAME    : function name
     43  *      __TYPE       : return and range limits type
     44  *      __WRAPPED    : wrapped function, strtoimax or strtoumax
     45  */
     46 
     47 __TYPE
     48 _FUNCNAME(const char * __restrict nptr, char ** __restrict endptr, int base,
     49           __TYPE lo, __TYPE hi, int * rstatus)
     50 {
     51 	int serrno;
     52 	__TYPE im;
     53 	char *ep;
     54 	int rep;
     55 
     56 	/* endptr may be NULL */
     57 
     58 	if (endptr == NULL)
     59 		endptr = &ep;
     60 
     61 	if (rstatus == NULL)
     62 		rstatus = &rep;
     63 
     64 	serrno = errno;
     65 	errno = 0;
     66 
     67 	im = __WRAPPED(nptr, endptr, base);
     68 
     69 	*rstatus = errno;
     70 	errno = serrno;
     71 
     72 	if (*rstatus == 0) {
     73 		/* No digits were found */
     74 		if (nptr == *endptr)
     75 			*rstatus = ECANCELED;
     76 		/* There are further characters after number */
     77 		else if (**endptr != '\0')
     78 			*rstatus = ENOTSUP;
     79 	}
     80 
     81 	if (im < lo) {
     82 		if (*rstatus == 0)
     83 			*rstatus = ERANGE;
     84 		return lo;
     85 	}
     86 	if (im > hi) {
     87 		if (*rstatus == 0)
     88 			*rstatus = ERANGE;
     89 		return hi;
     90 	}
     91 
     92 	return im;
     93 }
     94