149 lines
4.7 KiB
C
149 lines
4.7 KiB
C
/*------------------------------------------------------------------
|
|
* memmove_s.c
|
|
*
|
|
* October 2008, Bo Berry
|
|
*
|
|
* Copyright (c) 2008-2011 Cisco Systems
|
|
* 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_mem_constraint.h"
|
|
#include "mem_primitives_lib.h"
|
|
#include "safe_mem_lib.h"
|
|
|
|
/**
|
|
* NAME
|
|
* memmove_s
|
|
*
|
|
* SYNOPSIS
|
|
* #include "safe_mem_lib.h"
|
|
* errno_t
|
|
* memmove_s(void *dest, rsize_t dmax,
|
|
* const void *src, rsize_t smax)
|
|
*
|
|
* DESCRIPTION
|
|
* The memmove_s function copies smax bytes from the region pointed
|
|
* to by src into the region pointed to by dest. This copying takes place
|
|
* as if the smax bytes from the region pointed to by src are first copied
|
|
* into a temporary array of smax bytes that does not overlap the region
|
|
* pointed to by dest or src, and then the smax bytes from the temporary
|
|
* array are copied into the object region to by dest.
|
|
*
|
|
* SPECIFIED IN
|
|
* 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 the memory that will be replaced by src.
|
|
*
|
|
* dmax maximum length of the resulting dest, in bytes
|
|
*
|
|
* src pointer to the memory that will be copied
|
|
* to dest
|
|
*
|
|
* smax maximum number bytes of src that can be copied
|
|
*
|
|
* OUTPUT PARAMETERS
|
|
* dest is updated
|
|
*
|
|
* RUNTIME CONSTRAINTS
|
|
* Neither dest nor src shall be a null pointer.
|
|
* Neither dmax nor smax shall be 0.
|
|
* dmax shall not be greater than RSIZE_MAX_MEM.
|
|
* smax shall not be greater than dmax.
|
|
* If there is a runtime-constraint violation, the memmove_s function
|
|
* stores zeros in the first dmax characters of the regionpointed to
|
|
* by dest if dest is not a null pointer and dmax is not greater
|
|
* than RSIZE_MAX_MEM.
|
|
*
|
|
* RETURN VALUE
|
|
* EOK successful operation
|
|
* ESNULLP NULL pointer
|
|
* ESZEROL zero length
|
|
* ESLEMAX length exceeds max limit
|
|
*
|
|
* ALSO SEE
|
|
* memmove16_s(), memmove32_s(), memcpy_s(), memcpy16_s() memcpy32_s()
|
|
*
|
|
*/
|
|
errno_t
|
|
memmove_s (void *dest, rsize_t dmax, const void *src, rsize_t smax)
|
|
{
|
|
uint8_t *dp;
|
|
const uint8_t *sp;
|
|
|
|
dp= dest;
|
|
sp = src;
|
|
|
|
if (dp == NULL) {
|
|
invoke_safe_mem_constraint_handler("memmove_s: dest is null",
|
|
NULL, ESNULLP);
|
|
return (RCNEGATE(ESNULLP));
|
|
}
|
|
|
|
if (dmax == 0) {
|
|
invoke_safe_mem_constraint_handler("memmove_s: dmax is 0",
|
|
NULL, ESZEROL);
|
|
return (RCNEGATE(ESZEROL));
|
|
}
|
|
|
|
if (dmax > RSIZE_MAX_MEM) {
|
|
invoke_safe_mem_constraint_handler("memmove_s: dmax exceeds max",
|
|
NULL, ESLEMAX);
|
|
return (RCNEGATE(ESLEMAX));
|
|
}
|
|
|
|
if (smax == 0) {
|
|
mem_prim_set(dp, dmax, 0);
|
|
invoke_safe_mem_constraint_handler("memmove_s: smax is 0",
|
|
NULL, ESZEROL);
|
|
return (RCNEGATE(ESZEROL));
|
|
}
|
|
|
|
if (smax > dmax) {
|
|
mem_prim_set(dp, dmax, 0);
|
|
invoke_safe_mem_constraint_handler("memmove_s: smax exceeds max",
|
|
NULL, ESLEMAX);
|
|
return (RCNEGATE(ESLEMAX));
|
|
}
|
|
|
|
if (sp == NULL) {
|
|
mem_prim_set(dp, dmax, 0);
|
|
invoke_safe_mem_constraint_handler("memmove_s: src is null",
|
|
NULL, ESNULLP);
|
|
return (RCNEGATE(ESNULLP));
|
|
}
|
|
|
|
/*
|
|
* now perform the copy
|
|
*/
|
|
mem_prim_move(dp, sp, smax);
|
|
|
|
return (RCNEGATE(EOK));
|
|
}
|
|
EXPORT_SYMBOL(memmove_s);
|