safec  2.1
Safe C Library - ISO TR24731 Bounds Checking Interface
memzero16_s.c
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1 /*------------------------------------------------------------------
2  * memzero16_s - zeros memory
3  *
4  * October 2008, Bo Berry
5  *
6  * Copyright (c) 2008-2011 Cisco Systems
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_mem_constraint.h"
34 #include "mem_primitives_lib.h"
35 #include "safe_mem_lib.h"
36 
37 
63 errno_t
64 memzero16_s (uint16_t *dest, rsize_t len)
65 {
66  if (dest == NULL) {
67  invoke_safe_mem_constraint_handler("memzero16_s: dest is null",
68  NULL, ESNULLP);
69  return (RCNEGATE(ESNULLP));
70  }
71 
72  if (len == 0) {
73  invoke_safe_mem_constraint_handler("memzero16_s: len is 0",
74  NULL, ESZEROL);
75  return (RCNEGATE(ESZEROL));
76  }
77 
78  if (len > RSIZE_MAX_MEM16) {
79  invoke_safe_mem_constraint_handler("memzero16_s: len exceeds max",
80  NULL, ESLEMAX);
81  return (RCNEGATE(ESLEMAX));
82  }
83 
84  /*
85  * mem_prim_set16(dest, len, 0xDEAD);
86  * mem_prim_set16(dest, len, 0xBEEF);
87  */
88  mem_prim_set16(dest, len, 0);
89 
90  return (RCNEGATE(EOK));
91 }
92 EXPORT_SYMBOL(memzero16_s)
errno_t memzero16_s(uint16_t *dest, rsize_t len)
Zeros len uint16_ts starting at dest.
Definition: memzero16_s.c:64
void mem_prim_set16(uint16_t *dest, uint32_t len, uint16_t value)
Sets len uint16_t's starting at dest to the specified value.
void invoke_safe_mem_constraint_handler(const char *msg, void *ptr, errno_t error)
Invokes the currently set constraint handler or the default.