BaseMemoryLibSse2\r
BaseMemoryLibRepStr\r
PeiMemoryLib\r
- UefiMemoryLib\r
+ DxeMemoryLib\r
\r
**/\r
\r
#include "MemLibInternals.h"\r
\r
/**\r
- Compares two memory buffers of a given length.\r
+ Compares the contents of two buffers.\r
\r
- This function compares Length bytes of SourceBuffer to Length bytes of\r
- DestinationBuffer. If all Length bytes of the two buffers are identical, then\r
- 0 is returned. Otherwise, the value returned is the first mismatched byte in\r
- SourceBuffer subtracted from the first mismatched byte in DestinationBuffer.\r
+ This function compares Length bytes of SourceBuffer to Length bytes of DestinationBuffer.\r
+ If all Length bytes of the two buffers are identical, then 0 is returned. Otherwise, the\r
+ value returned is the first mismatched byte in SourceBuffer subtracted from the first\r
+ mismatched byte in DestinationBuffer.\r
+ If Length > 0 and DestinationBuffer is NULL and Length > 0, then ASSERT().\r
+ If Length > 0 and SourceBuffer is NULL and Length > 0, then ASSERT().\r
+ If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then ASSERT(). \r
+ If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT(). \r
\r
- If DestinationBuffer is NULL and Length > 0, then ASSERT().\r
- If SourceBuffer is NULL and Length > 0, then ASSERT().\r
- If Length is greater than (MAX_ADDRESS - DestinationBuffer + 1), then\r
- ASSERT().\r
- If Length is greater than (MAX_ADDRESS - SourceBuffer + 1), then ASSERT().\r
\r
- @param DestinationBuffer First memory buffer\r
- @param SourceBuffer Second memory buffer\r
- @param Length Length of DestinationBuffer and SourceBuffer memory\r
- regions to compare\r
+ @param DestinationBuffer Pointer to the destination buffer to compare.\r
+ @param SourceBuffer Pointer to the source buffer to compare.\r
+ @param Length Number of bytes to compare.\r
\r
- @retval 0 if DestinationBuffer == SourceBuffer\r
- @retval Non-zero if DestinationBuffer != SourceBuffer\r
+ @return 0 All Length bytes of the two buffers are identical.\r
+ @retval Non-zero The first mismatched byte in SourceBuffer subtracted from the first\r
+ mismatched byte in DestinationBuffer.\r
\r
**/\r
INTN\r
EFIAPI\r
CompareMem (\r
- IN CONST VOID *DestinationBuffer,\r
- IN CONST VOID *SourceBuffer,\r
- IN UINTN Length\r
+ IN CONST VOID *DestinationBuffer,\r
+ IN CONST VOID *SourceBuffer,\r
+ IN UINTN Length\r
)\r
{\r
- ASSERT (DestinationBuffer != NULL);\r
- ASSERT (SourceBuffer != NULL);\r
- ASSERT (Length <= MAX_ADDRESS - (UINTN)DestinationBuffer + 1);\r
- ASSERT (Length <= MAX_ADDRESS - (UINTN)SourceBuffer + 1);\r
if (Length == 0) {\r
return 0;\r
}\r
+ ASSERT (DestinationBuffer != NULL);\r
+ ASSERT (SourceBuffer != NULL);\r
+ ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)DestinationBuffer));\r
+ ASSERT ((Length - 1) <= (MAX_ADDRESS - (UINTN)SourceBuffer));\r
+\r
return InternalMemCompareMem (DestinationBuffer, SourceBuffer, Length);\r
}\r