diff options
Diffstat (limited to 'MdePkg/Library/BaseMemoryLibSse2/CompareMemWrapper.c')
| -rw-r--r-- | MdePkg/Library/BaseMemoryLibSse2/CompareMemWrapper.c | 40 |
1 files changed, 20 insertions, 20 deletions
diff --git a/MdePkg/Library/BaseMemoryLibSse2/CompareMemWrapper.c b/MdePkg/Library/BaseMemoryLibSse2/CompareMemWrapper.c index c8199d8dc3..6081bbe1b7 100644 --- a/MdePkg/Library/BaseMemoryLibSse2/CompareMemWrapper.c +++ b/MdePkg/Library/BaseMemoryLibSse2/CompareMemWrapper.c @@ -26,26 +26,25 @@ #include "MemLibInternals.h"
/**
- Compares two memory buffers of a given length.
+ Compares the contents of two buffers.
- This function compares Length bytes of SourceBuffer to Length bytes of
- DestinationBuffer. If all Length bytes of the two buffers are identical, then
- 0 is returned. Otherwise, the value returned is the first mismatched byte in
- SourceBuffer subtracted from the first mismatched byte in DestinationBuffer.
+ This function compares Length bytes of SourceBuffer to Length bytes of DestinationBuffer.
+ If all Length bytes of the two buffers are identical, then 0 is returned. Otherwise, the
+ value returned is the first mismatched byte in SourceBuffer subtracted from the first
+ mismatched byte in DestinationBuffer.
+ If Length > 0 and DestinationBuffer is NULL and Length > 0, then ASSERT().
+ If Length > 0 and SourceBuffer is NULL and Length > 0, then ASSERT().
+ If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then ASSERT().
+ If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().
- If DestinationBuffer is NULL and Length > 0, then ASSERT().
- If SourceBuffer is NULL and Length > 0, then ASSERT().
- If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then
- ASSERT().
- If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().
- @param DestinationBuffer First memory buffer
- @param SourceBuffer Second memory buffer
- @param Length Length of DestinationBuffer and SourceBuffer memory
- regions to compare
+ @param DestinationBuffer Pointer to the destination buffer to compare.
+ @param SourceBuffer Pointer to the source buffer to compare.
+ @param Length Number of bytes to compare.
- @retval 0 if DestinationBuffer == SourceBuffer
- @retval Non-zero if DestinationBuffer != SourceBuffer
+ @return 0 All Length bytes of the two buffers are identical.
+ @retval Non-zero The first mismatched byte in SourceBuffer subtracted from the first
+ mismatched byte in DestinationBuffer.
**/
INTN
@@ -56,12 +55,13 @@ CompareMem ( IN UINTN Length
)
{
- ASSERT (DestinationBuffer != NULL);
- ASSERT (SourceBuffer != NULL);
- ASSERT (Length <= MAX_ADDRESS - (UINTN)DestinationBuffer + 1);
- ASSERT (Length <= MAX_ADDRESS - (UINTN)SourceBuffer + 1);
if (Length == 0) {
return 0;
}
+ ASSERT (DestinationBuffer != NULL);
+ ASSERT (SourceBuffer != NULL);
+ ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)DestinationBuffer));
+ ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)SourceBuffer));
+
return InternalMemCompareMem (DestinationBuffer, SourceBuffer, Length);
}
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