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Added GSFastEnumeration.h from -base to -gui so we can use fast enumeration there too.

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git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@31549 72102866-910b-0410-8b05-ffd578937521
This commit is contained in:
David Chisnall 2010-10-22 13:11:14 +00:00
parent 0327e131df
commit 3521c1f7c4
1 changed files with 38 additions and 0 deletions
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38
Source/GSFastEnumeration.h Normal file
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@ -0,0 +1,38 @@
#ifdef __clang__
#define FOR_IN(type, var, collection) \
for (type var in collection)\
{
#define END_FOR_IN(collection) }
#else
void objc_enumerationMutation(id);
#define FOR_IN(type, var, c) \
do\
{\
type var;\
NSFastEnumerationState gs_##c##_enumState = { 0 };\
id gs_##c##_items[16];\
unsigned long gs_##c##_limit = \
[c countByEnumeratingWithState: &gs_##c##_enumState \
objects: gs_##c##_items \
count: 16];\
if (gs_##c##_limit)\
{\
unsigned long gs_startMutations = *gs_##c##_enumState.mutationsPtr;\
do {\
unsigned long gs_##c##counter = 0;\
do {\
if (gs_startMutations != *gs_##c##_enumState.mutationsPtr)\
{\
objc_enumerationMutation(c);\
}\
var = gs_##c##_enumState.itemsPtr[gs_##c##counter++];\
#define END_FOR_IN(c) \
} while (gs_##c##counter < gs_##c##_limit);\
} while ((gs_##c##_limit = [c countByEnumeratingWithState: &gs_##c##_enumState\
objects: gs_##c##_items\
count: 16]));\
}\
} while(0);
#endif