1 /**
2 * Copyright 2020 Huawei Technologies Co., Ltd
3 *
4 * Licensed under the Apache License, Version 2.0 (the "License");
5 * you may not use this file except in compliance with the License.
6 * You may obtain a copy of the License at
7 *
8 * http://www.apache.org/licenses/LICENSE-2.0
9 *
10 * Unless required by applicable law or agreed to in writing, software
11 * distributed under the License is distributed on an "AS IS" BASIS,
12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13 * See the License for the specific language governing permissions and
14 * limitations under the License.
15 */
16
17 #define SECUREC_INLINE_DO_MEMCPY 1
18
19 #include "securecutil.h"
20
SecDoWcscpy(wchar_t * strDest,size_t destMax,const wchar_t * strSrc)21 static errno_t SecDoWcscpy(wchar_t *strDest, size_t destMax, const wchar_t *strSrc)
22 {
23 size_t srcStrLen;
24
25 SECUREC_CALC_WSTR_LEN(strSrc, destMax, &srcStrLen);
26 if (srcStrLen == destMax) {
27 strDest[0] = '\0';
28 SECUREC_ERROR_INVALID_RANGE("wcscpy_s");
29 return ERANGE_AND_RESET;
30 }
31 if (strDest == strSrc) {
32 return EOK;
33 }
34
35 if (SECUREC_STRING_NO_OVERLAP(strDest, strSrc, srcStrLen)) {
36 /* performance optimization srcStrLen include '\0' */
37 SecDoMemcpy(strDest, strSrc, (srcStrLen + 1) * sizeof(wchar_t)); /* single character length include \0 */
38 return EOK;
39 } else {
40 strDest[0] = L'\0';
41 SECUREC_ERROR_BUFFER_OVERLAP("wcscpy_s");
42 return EOVERLAP_AND_RESET;
43 }
44 }
45
46 /*
47 * <FUNCTION DESCRIPTION>
48 * The wcscpy_s function copies the wide string pointed to by strSrc
49 * (including theterminating null wide character) into the array pointed to by strDest
50
51 * <INPUT PARAMETERS>
52 * strDest Destination string buffer
53 * destMax Size of the destination string buffer.
54 * strSrc Null-terminated source string buffer.
55 *
56 * <OUTPUT PARAMETERS>
57 * strDest is updated.
58 *
59 * <RETURN VALUE>
60 * EOK Success
61 * EINVAL strDest is NULL and destMax != 0 and destMax <= SECUREC_WCHAR_STRING_MAX_LEN
62 * EINVAL_AND_RESET strDest != NULL and strSrc is NULLL and destMax != 0
63 * and destMax <= SECUREC_WCHAR_STRING_MAX_LEN
64 * ERANGE destMax > SECUREC_WCHAR_STRING_MAX_LEN or destMax is 0
65 * ERANGE_AND_RESET destMax <= length of strSrc and strDest != strSrc
66 * and strDest != NULL and strSrc != NULL and destMax != 0
67 * and destMax <= SECUREC_WCHAR_STRING_MAX_LEN and not overlap
68 * EOVERLAP_AND_RESET dest buffer and source buffer are overlapped and destMax != 0
69 * and destMax <= SECUREC_WCHAR_STRING_MAX_LEN
70 * and strDest != NULL and strSrc !=NULL and strDest != strSrc
71 *
72 * If there is a runtime-constraint violation, strDest[0] will be set to the '\0' when strDest and destMax valid
73 */
wcscpy_s(wchar_t * strDest,size_t destMax,const wchar_t * strSrc)74 errno_t wcscpy_s(wchar_t *strDest, size_t destMax, const wchar_t *strSrc)
75 {
76 if (destMax == 0 || destMax > SECUREC_WCHAR_STRING_MAX_LEN) {
77 SECUREC_ERROR_INVALID_RANGE("wcscpy_s");
78 return ERANGE;
79 }
80 if (strDest == NULL || strSrc == NULL) {
81 SECUREC_ERROR_INVALID_PARAMTER("wcscpy_s");
82 if (strDest != NULL) {
83 strDest[0] = L'\0';
84 return EINVAL_AND_RESET;
85 }
86 return EINVAL;
87 }
88 return SecDoWcscpy(strDest, destMax, strSrc);
89 }
90
91
92