119 lines
3.3 KiB
C
119 lines
3.3 KiB
C
/*------------------------------------------------------------------
|
|
* strishex_s.c
|
|
*
|
|
* October 2008, Bo Berry
|
|
*
|
|
* Copyright (c) 2008-2011, 2013 by Cisco Systems, Inc
|
|
* All rights reserved.
|
|
*
|
|
* Permission is hereby granted, free of charge, to any person
|
|
* obtaining a copy of this software and associated documentation
|
|
* files (the "Software"), to deal in the Software without
|
|
* restriction, including without limitation the rights to use,
|
|
* copy, modify, merge, publish, distribute, sublicense, and/or
|
|
* sell copies of the Software, and to permit persons to whom the
|
|
* Software is furnished to do so, subject to the following
|
|
* conditions:
|
|
*
|
|
* The above copyright notice and this permission notice shall be
|
|
* included in all copies or substantial portions of the Software.
|
|
*
|
|
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
|
|
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
|
|
* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
|
|
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
|
|
* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
|
|
* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
|
|
* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
|
|
* OTHER DEALINGS IN THE SOFTWARE.
|
|
*------------------------------------------------------------------
|
|
*/
|
|
|
|
#include "safeclib_private.h"
|
|
#include "safe_str_constraint.h"
|
|
#include "safe_str_lib.h"
|
|
|
|
|
|
/**
|
|
* NAME
|
|
* strishex_s
|
|
*
|
|
* SYNOPSIS
|
|
* #include "safe_str_lib.h"
|
|
* bool
|
|
* strishex_s(const char *dest, rsize_t dmax)
|
|
*
|
|
* DESCRIPTION
|
|
* This function checks that the entire string contains
|
|
* hex characters. The scanning stops at the first null
|
|
* or after dmax characters.
|
|
*
|
|
* EXTENSION TO
|
|
* ISO/IEC TR 24731, Programming languages, environments
|
|
* and system software interfaces, Extensions to the C Library,
|
|
* Part I: Bounds-checking interfaces
|
|
*
|
|
* INPUT PARAMETERS
|
|
* dest pointer to string
|
|
*
|
|
* dmax maximum length of string
|
|
*
|
|
* OUTPUT PARAMETERS
|
|
* none
|
|
*
|
|
* RUNTIME CONSTRAINTS
|
|
* dest shall not be a null pointer.
|
|
* dmax shall not equal zero.
|
|
* dmax shall not be greater than RSIZE_MAX_STR.
|
|
*
|
|
* RETURN VALUE
|
|
* true string is hex
|
|
* false string is not hex or an error occurred
|
|
*
|
|
* ALSO SEE
|
|
* strisalphanumeric_s(), strisascii_s(), strisdigit_s(),
|
|
* strislowercase_s(), strismixedcase_s(),
|
|
* strisuppercase_s()
|
|
*
|
|
*/
|
|
bool
|
|
strishex_s (const char *dest, rsize_t dmax)
|
|
{
|
|
if (!dest) {
|
|
invoke_safe_str_constraint_handler("strishex_s: dest is null",
|
|
NULL, ESNULLP);
|
|
return (false);
|
|
}
|
|
|
|
if (dmax == 0) {
|
|
invoke_safe_str_constraint_handler("strishex_s: dmax is 0",
|
|
NULL, ESZEROL);
|
|
return (false);
|
|
}
|
|
|
|
if (dmax > RSIZE_MAX_STR) {
|
|
invoke_safe_str_constraint_handler("strishex_s: dmax exceeds max",
|
|
NULL, ESLEMAX);
|
|
return (false);
|
|
}
|
|
|
|
if (*dest == '\0') {
|
|
return (false);
|
|
}
|
|
|
|
while (*dest && dmax) {
|
|
|
|
if (((*dest >= '0') && (*dest <= '9')) ||
|
|
((*dest >= 'a') && (*dest <= 'f')) ||
|
|
((*dest >= 'A') && (*dest <= 'F'))) {
|
|
dest++;
|
|
dmax--;
|
|
|
|
} else {
|
|
return (false);
|
|
}
|
|
}
|
|
|
|
return (true);
|
|
}
|