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MdePkg/BasePrintLib: Do not do operations with NULL

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Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Harry Liebel <Harry.Liebel@arm.com>
Reviewed-By: Olivier Martin <olivier.martin@arm.com>
Reviewed-by: Gao, Liming <liming.gao@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@15646 6f19259b-4bc3-4df7-8a09-765794883524
This commit is contained in:
Harry Liebel 2014-07-09 09:10:44 +00:00 committed by oliviermartin
parent 85e2e0854b
commit 28087ef09f
1 changed files with 14 additions and 7 deletions
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21
MdePkg/Library/BasePrintLib/PrintLibInternal.c
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@ -373,17 +373,21 @@ BasePrintLibSPrintMarker (
} }
LengthToReturn = 0; LengthToReturn = 0;
EndBuffer = NULL;
OriginalBuffer = NULL;
// //
// Reserve space for the Null terminator. // Reserve space for the Null terminator.
// //
BufferSize--; if (Buffer != NULL) {
OriginalBuffer = Buffer; BufferSize--;
OriginalBuffer = Buffer;
// //
// Set the tag for the end of the input Buffer. // Set the tag for the end of the input Buffer.
// //
EndBuffer = Buffer + BufferSize * BytesPerOutputCharacter; EndBuffer = Buffer + BufferSize * BytesPerOutputCharacter;
}
if ((Flags & FORMAT_UNICODE) != 0) { if ((Flags & FORMAT_UNICODE) != 0) {
// //
@ -411,7 +415,10 @@ BasePrintLibSPrintMarker (
// //
// Loop until the end of the format string is reached or the output buffer is full // Loop until the end of the format string is reached or the output buffer is full
// //
while (FormatCharacter != 0 && Buffer < EndBuffer) { while (FormatCharacter != 0) {
if ((Buffer != NULL) && (Buffer >= EndBuffer)) {
break;
}
// //
// Clear all the flag bits except those that may have been passed in // Clear all the flag bits except those that may have been passed in
// //