diff options
Diffstat (limited to 'src/pal/src/safecrt/memmove_s.c')
-rw-r--r-- | src/pal/src/safecrt/memmove_s.c | 69 |
1 files changed, 69 insertions, 0 deletions
diff --git a/src/pal/src/safecrt/memmove_s.c b/src/pal/src/safecrt/memmove_s.c new file mode 100644 index 0000000000..a0ae5f7ea6 --- /dev/null +++ b/src/pal/src/safecrt/memmove_s.c @@ -0,0 +1,69 @@ +// Licensed to the .NET Foundation under one or more agreements. +// The .NET Foundation licenses this file to you under the MIT license. +// See the LICENSE file in the project root for more information. + +/*** +*memmove_s.c - contains memmove_s routine +* + +* +*Purpose: +* memmove_s() copies a source memory buffer to a destination buffer. +* Overlapping buffers are treated specially, to avoid propagation. +* +*Revision History: +* 10-07-03 AC Module created. +* 03-10-04 AC Return ERANGE when buffer is too small +* +*******************************************************************************/ + +#include <string.h> +#include <errno.h> +#include "internal_securecrt.h" +#include "mbusafecrt_internal.h" + +/*** +*memmove - Copy source buffer to destination buffer +* +*Purpose: +* memmove() copies a source memory buffer to a destination memory buffer. +* This routine recognize overlapping buffers to avoid propagation. +* +* For cases where propagation is not a problem, memcpy_s() can be used. +* +*Entry: +* void *dst = pointer to destination buffer +* size_t sizeInBytes = size in bytes of the destination buffer +* const void *src = pointer to source buffer +* size_t count = number of bytes to copy +* +*Exit: +* Returns 0 if everything is ok, else return the error code. +* +*Exceptions: +* Input parameters are validated. Refer to the validation section of the function. +* On error, the error code is returned. Nothing is written to the destination buffer. +* +*******************************************************************************/ + +errno_t __cdecl memmove_s( + void * dst, + size_t sizeInBytes, + const void * src, + size_t count +) +{ + if (count == 0) + { + /* nothing to do */ + return 0; + } + + /* validation section */ + _VALIDATE_RETURN_ERRCODE(dst != NULL, EINVAL); + _VALIDATE_RETURN_ERRCODE(src != NULL, EINVAL); + _VALIDATE_RETURN_ERRCODE(sizeInBytes >= count, ERANGE); + + memmove(dst, src, count); + return 0; +} |