1 /*------------------------------------------------------------------
2 * strismixedcase_s.c
3 *
4 * November 2008, Bo Berry
5 *
6 * Copyright (c) 2008-2011, 2013 by Cisco Systems, Inc
7 * All rights reserved.
8 *
9 * Permission is hereby granted, free of charge, to any person
10 * obtaining a copy of this software and associated documentation
11 * files (the "Software"), to deal in the Software without
12 * restriction, including without limitation the rights to use,
13 * copy, modify, merge, publish, distribute, sublicense, and/or
14 * sell copies of the Software, and to permit persons to whom the
15 * Software is furnished to do so, subject to the following
16 * conditions:
17 *
18 * The above copyright notice and this permission notice shall be
19 * included in all copies or substantial portions of the Software.
20 *
21 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
22 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
23 * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
24 * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
25 * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
26 * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
27 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
28 * OTHER DEALINGS IN THE SOFTWARE.
29 *------------------------------------------------------------------
30 */
31
32 #include "safeclib_private.h"
33 #include "safe_str_constraint.h"
34 #include "safe_str_lib.h"
35
36
37 /**
38 * NAME
39 * strismixedcase_s
40 *
41 * SYNOPSIS
42 * #include "safe_str_lib.h"
43 * bool
44 * strismixedcase_s(const char *dest, rsize_t dmax)
45 *
46 * DESCRIPTION
47 * This function checks that the entire string is mixed
48 * case. The scanning stops at the first null or after
49 * dmax characters.
50 *
51 * EXTENSION TO
52 * ISO/IEC TR 24731, Programming languages, environments
53 * and system software interfaces, Extensions to the C Library,
54 * Part I: Bounds-checking interfaces
55 *
56 * INPUT PARAMETERS
57 * dest pointer to string
58 *
59 * dmax maximum length of string
60 *
61 * OUTPUT PARAMETERS
62 * none
63 *
64 * RUNTIME CONSTRAINTS
65 * dest shall not be a null pointer.
66 * dmax shall not equal zero.
67 * dmax shall not be greater than RSIZE_MAX_STR.
68 *
69 * RETURN VALUE
70 * true string is mixed case
71 * false string is not mixed case or error
72 *
73 * ALSO SEE
74 * strisalphanumeric_s(), strisascii_s(), strisdigit_s(),
75 * strishex_s(), strislowercase_s(),
76 * strisuppercase_s()
77 *
78 */
79 bool
strismixedcase_s(const char * dest,rsize_t dmax)80 strismixedcase_s (const char *dest, rsize_t dmax)
81 {
82 if (!dest) {
83 invoke_safe_str_constraint_handler("strismixedcase_s: "
84 "dest is null",
85 NULL, ESNULLP);
86 return (false);
87 }
88
89 if (dmax == 0) {
90 invoke_safe_str_constraint_handler("strismixedcase_s: "
91 "dmax is 0",
92 NULL, ESZEROL);
93 return (false);
94 }
95
96 if (dmax > RSIZE_MAX_STR) {
97 invoke_safe_str_constraint_handler("strismixedcase_s: "
98 "dmax exceeds max",
99 NULL, ESLEMAX);
100 return (false);
101 }
102
103 if (*dest == '\0') {
104 return (false);
105 }
106
107 while (*dest) {
108
109 if (((*dest >= 'a') && (*dest <= 'z')) ||
110 ((*dest >= 'A') && (*dest <= 'Z'))) {
111 dest++;
112 dmax--;
113 } else {
114 return (false);
115 }
116 }
117
118 return (true);
119 }
120 EXPORT_SYMBOL(strismixedcase_s)
121