64 lines
2.3 KiB
C
64 lines
2.3 KiB
C
/*
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* Copyright (c) Huawei Technologies Co., Ltd. 2014-2018. All rights reserved.
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* Description: wmemmove_s function
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* Author: lishunda
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* Create: 2014-02-25
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*/
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/*
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* [Standardize-exceptions] Use unsafe function: Portability
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* [reason] Use unsafe function to implement security function to maintain
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* platform compatibility. And sufficient input validation is performed before
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* calling
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*/
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#include "securecutil.h"
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/*
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* <FUNCTION DESCRIPTION>
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* The wmemmove_s function copies n successive wide characters from the object
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* pointed to by src into the object pointed to by dest.
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*
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* <INPUT PARAMETERS>
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* dest Destination buffer.
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* destMax Size of the destination buffer.
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* src Source object.
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* count Number of bytes or character to copy.
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*
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* <OUTPUT PARAMETERS>
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* dest is updated.
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*
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* <RETURN VALUE>
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* EOK Success
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* EINVAL dest is NULL and destMax != 0 and count <=
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* destMax and destMax <= SECUREC_WCHAR_MEM_MAX_LEN EINVAL_AND_RESET dest !=
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* NULL and src is NULLL and destMax != 0 and destMax <=
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* SECUREC_WCHAR_MEM_MAX_LEN and count <= destMax ERANGE destMax >
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* SECUREC_WCHAR_MEM_MAX_LEN or destMax is 0 or (count > destMax and dest is
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* NULL and destMax != 0 and destMax <= SECUREC_WCHAR_MEM_MAX_LEN)
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* ERANGE_AND_RESET count > destMax and dest != NULL and destMax !=
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* 0 and destMax <= SECUREC_WCHAR_MEM_MAX_LEN
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*
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*
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* If an error occured, dest will be filled with 0 when dest and destMax
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* valid. If some regions of the source area and the destination overlap,
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* wmemmove_s ensures that the original source bytes in the overlapping region
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* are copied before being overwritten
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*/
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errno_t wmemmove_s(wchar_t *dest, size_t destMax, const wchar_t *src,
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size_t count) {
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if (destMax == 0 || destMax > SECUREC_WCHAR_MEM_MAX_LEN) {
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SECUREC_ERROR_INVALID_PARAMTER("wmemmove_s");
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return ERANGE;
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}
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if (count > destMax) {
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SECUREC_ERROR_INVALID_PARAMTER("wmemmove_s");
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if (dest != NULL) {
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(void)memset(dest, 0, destMax * sizeof(wchar_t));
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return ERANGE_AND_RESET;
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}
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return ERANGE;
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}
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return memmove_s(dest, destMax * sizeof(wchar_t), src,
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count * sizeof(wchar_t));
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}
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