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1 /*
2  * Copyright (c) 2001-2018 The strace developers.
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  * 3. The name of the author may not be used to endorse or promote products
14  *    derived from this software without specific prior written permission.
15  *
16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
17  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
18  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
19  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
20  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
21  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
22  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
23  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
24  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
25  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
26  */
27 
28 #ifdef HAVE_CONFIG_H
29 # include "config.h"
30 #endif
31 
32 #include <errno.h>
33 #include <stdlib.h>
34 #include <string.h>
35 
36 #include "string_to_uint.h"
37 
38 long long
string_to_uint_ex(const char * const str,char ** const endptr,const unsigned long long max_val,const char * const accepted_ending)39 string_to_uint_ex(const char *const str, char **const endptr,
40 		  const unsigned long long max_val,
41 		  const char *const accepted_ending)
42 {
43 	char *end;
44 	long long val;
45 
46 	if (!*str)
47 		return -1;
48 
49 	errno = 0;
50 	val = strtoll(str, &end, 10);
51 
52 	if (str == end || val < 0 || (unsigned long long) val > max_val
53 	    || (val == LLONG_MAX && errno == ERANGE))
54 		return -1;
55 
56 	if (*end && (!accepted_ending || !strchr(accepted_ending, *end)))
57 		return -1;
58 
59 	if (endptr)
60 		*endptr = end;
61 
62 	return val;
63 }
64