safec  2.1
Safe C Library - ISO TR24731 Bounds Checking Interface
strpbrk_s.c
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1 /*------------------------------------------------------------------
2  * strpbrk_s.c
3  *
4  * November 2008, Bo Berry
5  *
6  * Copyright (c) 2008-2011 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 
68 errno_t
69 strpbrk_s (char *dest, rsize_t dmax,
70  char *src, rsize_t slen, char **first)
71 {
72  char *ps;
73  rsize_t len;
74 
75  if (first == NULL) {
76  invoke_safe_str_constraint_handler("strpbrk_s: count is null",
77  NULL, ESNULLP);
78  return RCNEGATE(ESNULLP);
79  }
80  *first = NULL;
81 
82  if (dest == NULL) {
83  invoke_safe_str_constraint_handler("strpbrk_s: dest is null",
84  NULL, ESNULLP);
85  return RCNEGATE(ESNULLP);
86  }
87 
88  if (src == NULL) {
89  invoke_safe_str_constraint_handler("strpbrk_s: src is null",
90  NULL, ESNULLP);
91  return RCNEGATE(ESNULLP);
92  }
93 
94  if (dmax == 0 ) {
95  invoke_safe_str_constraint_handler("strpbrk_s: dmax is 0",
96  NULL, ESZEROL);
97  return RCNEGATE(ESZEROL);
98  }
99 
100  if (dmax > RSIZE_MAX_STR) {
101  invoke_safe_str_constraint_handler("strpbrk_s: dmax exceeds max",
102  NULL, ESLEMAX);
103  return RCNEGATE(ESLEMAX);
104  }
105 
106  if (slen == 0 ) {
107  invoke_safe_str_constraint_handler("strpbrk_s: slen is 0",
108  NULL, ESZEROL);
109  return RCNEGATE(ESZEROL);
110  }
111 
112  if (slen > RSIZE_MAX_STR) {
113  invoke_safe_str_constraint_handler("strpbrk_s: slen exceeds max",
114  NULL, ESLEMAX);
115  return RCNEGATE(ESLEMAX);
116  }
117 
118  /*
119  * look for a matching char in the substring src
120  */
121  while (*dest && dmax) {
122 
123  ps = src;
124  len = slen;
125  while (*ps) {
126 
127  /* check for a match with the substring */
128  if (*dest == *ps) {
129  *first = dest;
130  return RCNEGATE(EOK);
131  }
132  ps++;
133  len--;
134  }
135  dest++;
136  dmax--;
137  }
138 
139  return RCNEGATE(ESNOTFND);
140 }
141 EXPORT_SYMBOL(strpbrk_s)
errno_t strpbrk_s(char *dest, rsize_t dmax, char *src, rsize_t slen, char **first)
Returns a pointer, first, to the first ocurrence of any character in src which is contained in dest...
Definition: strpbrk_s.c:69
void invoke_safe_str_constraint_handler(const char *msg, void *ptr, errno_t error)
Invokes the currently set constraint handler or the default.