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Minor tweak to hashkey calculation. Bug 240934.

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This commit is contained in:
bzbarsky%mit.edu 2004-05-02 19:56:06 +00:00
parent 022d627b12
commit efb534bb2c
2 changed files with 10 additions and 8 deletions
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9
layout/base/nsPresShell.cpp
View File

@ -1031,11 +1031,12 @@ ReflowCommandHashHashKey(PLDHashTable *table, const void *key)
const nsHTMLReflowCommand* command =
NS_STATIC_CAST(const nsHTMLReflowCommand*, key);
// The target is going to be reasonbly unique, the type comes from an enum
// and we just don't have that many types, and the child list name is either
// null or has the same high-order bits as all the other child list names.
// The target is going to be reasonably unique, if we shift out the
// always-zero low-order bits, the type comes from an enum and we just don't
// have that many types, and the child list name is either null or has the
// same high-order bits as all the other child list names.
return
NS_PTR_TO_INT32(command->GetTarget()) ^
(NS_PTR_TO_INT32(command->GetTarget()) >> 2) ^
(command->GetType() << 17) ^
(NS_PTR_TO_INT32(command->GetChildListName()) << 20);
}

9
layout/html/base/src/nsPresShell.cpp
View File

@ -1031,11 +1031,12 @@ ReflowCommandHashHashKey(PLDHashTable *table, const void *key)
const nsHTMLReflowCommand* command =
NS_STATIC_CAST(const nsHTMLReflowCommand*, key);
// The target is going to be reasonbly unique, the type comes from an enum
// and we just don't have that many types, and the child list name is either
// null or has the same high-order bits as all the other child list names.
// The target is going to be reasonably unique, if we shift out the
// always-zero low-order bits, the type comes from an enum and we just don't
// have that many types, and the child list name is either null or has the
// same high-order bits as all the other child list names.
return
NS_PTR_TO_INT32(command->GetTarget()) ^
(NS_PTR_TO_INT32(command->GetTarget()) >> 2) ^
(command->GetType() << 17) ^
(NS_PTR_TO_INT32(command->GetChildListName()) << 20);
}