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/*++
Copyright (c) 1999 Intel Corporation
Module Name:
EfiRtLib.h
Abstract:
EFI Runtime library functions
Revision History
--*/
#include "efi.h"
#include "efilib.h"
#include "efirtlib.h"
#ifndef __GNUC__
#pragma RUNTIME_CODE(RtZeroMem)
#endif
VOID
RUNTIMEFUNCTION
RtZeroMem (
IN VOID *Buffer,
IN UINTN Size
)
{
INT8 *pt;
pt = Buffer;
while (Size--) {
*(pt++) = 0;
}
}
#ifndef __GNUC__
#pragma RUNTIME_CODE(RtSetMem)
#endif
VOID
EFIAPI
RUNTIMEFUNCTION
RtSetMem (
IN VOID *Buffer,
IN UINTN Size,
IN UINT8 Value
)
{
INT8 *pt;
pt = Buffer;
while (Size--) {
*(pt++) = Value;
}
}
#ifndef __GNUC__
#pragma RUNTIME_CODE(RtCopyMem)
#endif
VOID
EFIAPI
RUNTIMEFUNCTION
RtCopyMem (
IN VOID *Dest,
IN VOID *Src,
IN UINTN len
)
{
CHAR8 *d = (CHAR8*)Dest;
CHAR8 *s = (CHAR8*)Src;
if (d == NULL || s == NULL || s == d)
return;
// If the beginning of the destination range overlaps with the end of
// the source range, make sure to start the copy from the end so that
// we don't end up overwriting source data that we need for the copy.
if ((d > s) && (d < s + len)) {
for (d += len, s += len; len--; )
*--d = *--s;
} else {
while (len--)
*d++ = *s++;
}
}
#ifndef __GNUC__
#pragma RUNTIME_CODE(RtCopyMemC)
#endif
VOID
EFIAPI
RUNTIMEFUNCTION
RtCopyMemC (
IN VOID *Dest,
IN CONST VOID *Src,
IN UINTN len
)
{
/* CopyMem matches ISO C apart from the change to NON-CONST Src
Overwriting Src is an intended outcome if overlapping occurs (per memmove)
This function is useful to avoid GCC dying in changing pointer setup
*/
RtCopyMem(Dest, (VOID*)Src, len);
}
#ifndef __GNUC__
#pragma RUNTIME_CODE(RtCompareMem)
#endif
INTN
RUNTIMEFUNCTION
RtCompareMem (
IN CONST VOID *Dest,
IN CONST VOID *Src,
IN UINTN len
)
{
CONST CHAR8 *d = Dest, *s = Src;
while (len--) {
if (*d != *s) {
return *d - *s;
}
d += 1;
s += 1;
}
return 0;
}
#ifndef __GNUC__
#pragma RUNTIME_CODE(RtCompareGuid)
#endif
BOOLEAN
EFIAPI
RUNTIMEFUNCTION
RtCompareGuid (
IN CONST EFI_GUID *Guid1,
IN CONST EFI_GUID *Guid2
)
/*++
Routine Description:
Compares to GUIDs
Arguments:
Guid1 - guid to compare
Guid2 - guid to compare
Returns:
= 1 if Guid1 == Guid2
--*/
{
INT32 *g1, *g2, r;
//
// Compare 32 bits at a time
//
g1 = (INT32 *) Guid1;
g2 = (INT32 *) Guid2;
r = g1[0] - g2[0];
r |= g1[1] - g2[1];
r |= g1[2] - g2[2];
r |= g1[3] - g2[3];
if (r==0) {
return 1;
} else {
return 0;
}
}
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