safec
2.1
Safe C Library - ISO TR24731 Bounds Checking Interface
strspn_s.c
Go to the documentation of this file.
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/*------------------------------------------------------------------
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* strspn_s.c
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*
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* November 2008, Bo Berry
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*
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* Copyright (c) 2008-2011, 2013 by Cisco Systems, Inc
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* All rights reserved.
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*------------------------------------------------------------------
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*/
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#include "safeclib_private.h"
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#include "safe_str_constraint.h"
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#include "safe_str_lib.h"
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errno_t
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strspn_s
(
const
char
*dest, rsize_t dmax,
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const
char
*src, rsize_t slen, rsize_t *count)
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{
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const
char
*scan2;
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rsize_t smax;
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bool
match_found;
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if
(count== NULL) {
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invoke_safe_str_constraint_handler
(
"strspn_s: count is null"
,
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NULL, ESNULLP);
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return
RCNEGATE(ESNULLP);
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}
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*count = 0;
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if
(dest == NULL) {
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invoke_safe_str_constraint_handler
(
"strspn_s: dest is null"
,
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NULL, ESNULLP);
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return
RCNEGATE(ESNULLP);
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}
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if
(src == NULL) {
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invoke_safe_str_constraint_handler
(
"strspn_s: src is null"
,
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NULL, ESNULLP);
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return
RCNEGATE(ESNULLP);
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}
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if
(dmax == 0 ) {
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invoke_safe_str_constraint_handler
(
"strspn_s: dmax is 0"
,
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NULL, ESZEROL);
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return
RCNEGATE(ESZEROL);
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}
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if
(dmax > RSIZE_MAX_STR) {
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invoke_safe_str_constraint_handler
(
"strspn_s: dmax exceeds max"
,
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NULL, ESLEMAX);
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return
RCNEGATE(ESLEMAX);
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}
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if
(slen == 0 ) {
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invoke_safe_str_constraint_handler
(
"strspn_s: slen is 0"
,
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NULL, ESZEROL);
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return
RCNEGATE(ESZEROL);
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}
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if
(slen > RSIZE_MAX_STR) {
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invoke_safe_str_constraint_handler
(
"strspn_s: slen exceeds max"
,
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NULL, ESLEMAX);
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return
RCNEGATE(ESLEMAX);
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}
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while
(*dest && dmax) {
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/*
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* Scan the entire src string for each dest character, counting
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* inclusions.
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*/
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match_found =
false
;
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smax = slen;
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scan2 = src;
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while
(*scan2 && smax) {
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if
(*dest == *scan2) {
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match_found =
true
;
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break
;
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}
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scan2++;
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smax--;
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}
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if
(match_found) {
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(*count)++;
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}
else
{
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break
;
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}
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dest++;
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dmax--;
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}
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return
RCNEGATE(EOK);
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}
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EXPORT_SYMBOL(
strspn_s
)
strspn_s
errno_t strspn_s(const char *dest, rsize_t dmax, const char *src, rsize_t slen, rsize_t *count)
This function computes the prefix length of the string pointed to by dest which consists entirely of ...
Definition:
strspn_s.c:69
invoke_safe_str_constraint_handler
void invoke_safe_str_constraint_handler(const char *msg, void *ptr, errno_t error)
Invokes the currently set constraint handler or the default.
Definition:
safe_str_constraint.c:99
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