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      1 /*
      2  * dhcpcd - DHCP client daemon
      3  * Copyright (c) 2006-2015 Roy Marples <roy (at) marples.name>
      4  * All rights reserved
      5 
      6  * Redistribution and use in source and binary forms, with or without
      7  * modification, are permitted provided that the following conditions
      8  * are met:
      9  * 1. Redistributions of source code must retain the above copyright
     10  *    notice, this list of conditions and the following disclaimer.
     11  * 2. Redistributions in binary form must reproduce the above copyright
     12  *    notice, this list of conditions and the following disclaimer in the
     13  *    documentation and/or other materials provided with the distribution.
     14  *
     15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     22  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     25  * SUCH DAMAGE.
     26  */
     27 
     28 #include <errno.h>
     29 #include <inttypes.h>
     30 #include <stdlib.h>
     31 
     32 #include "strtoi.h"
     33 
     34 intmax_t
     35 strtoi(const char * __restrict nptr, char ** __restrict endptr, int base,
     36     intmax_t lo, intmax_t hi, int *rstatus)
     37 {
     38 	int serrno;
     39 	intmax_t r;
     40 	char *ep;
     41 	int rep;
     42 
     43 	if (endptr == NULL)
     44 		endptr = &ep;
     45 	if (rstatus == NULL)
     46 		rstatus = &rep;
     47 
     48 	serrno = errno;
     49 	errno = 0;
     50 	r = strtoimax(nptr, endptr, base);
     51 	*rstatus = errno;
     52 	errno = serrno;
     53 
     54 	if (*rstatus == 0) {
     55 		if (nptr == *endptr)
     56 			*rstatus = ECANCELED;
     57 		else if (**endptr != '\0')
     58 			*rstatus = ENOTSUP;
     59 	}
     60 
     61 	if (r < lo) {
     62 		if (*rstatus == 0)
     63 			*rstatus = ERANGE;
     64 		return lo;
     65 	}
     66 	if (r > hi) {
     67 		if (*rstatus == 0)
     68 			*rstatus = ERANGE;
     69 		return hi;
     70 	}
     71 	return r;
     72 }
     73 
     74 uintmax_t
     75 strtou(const char * __restrict nptr, char ** __restrict endptr, int base,
     76     uintmax_t lo, uintmax_t hi, int *rstatus)
     77 {
     78 	int serrno;
     79 	uintmax_t r;
     80 	char *ep;
     81 	int rep;
     82 
     83 	if (endptr == NULL)
     84 		endptr = &ep;
     85 	if (rstatus == NULL)
     86 		rstatus = &rep;
     87 
     88 	serrno = errno;
     89 	errno = 0;
     90 	r = strtoumax(nptr, endptr, base);
     91 	*rstatus = errno;
     92 	errno = serrno;
     93 
     94 	if (*rstatus == 0) {
     95 		if (nptr == *endptr)
     96 			*rstatus = ECANCELED;
     97 		else if (**endptr != '\0')
     98 			*rstatus = ENOTSUP;
     99 	}
    100 
    101 	if (r < lo) {
    102 		if (*rstatus == 0)
    103 			*rstatus = ERANGE;
    104 		return lo;
    105 	}
    106 	if (r > hi) {
    107 		if (*rstatus == 0)
    108 			*rstatus = ERANGE;
    109 		return hi;
    110 	}
    111 	return r;
    112 }
    113