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add some comments for binary search

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Dana Jansens 2010-04-16 11:46:52 -04:00 committed by Mikael Magnusson
parent 3afa20de54
commit 3997d7aef5
1 changed files with 6 additions and 0 deletions
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6
obt/bsearch.h
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@ -23,9 +23,12 @@
G_BEGIN_DECLS G_BEGIN_DECLS
/*! Setup to do a binary search on an array holding elements of type @t */
#define BSEARCH_SETUP(t) \ #define BSEARCH_SETUP(t) \
register t l_BSEARCH, r_BSEARCH, out_BSEARCH; register t l_BSEARCH, r_BSEARCH, out_BSEARCH;
/*! Search an array @ar holding elements of type @t, starting at index @start,
with @size elements, looking for value @val. */
#define BSEARCH(t, ar, start, size, val) \ #define BSEARCH(t, ar, start, size, val) \
{ \ { \
l_BSEARCH = (start); \ l_BSEARCH = (start); \
@ -44,7 +47,10 @@ G_BEGIN_DECLS
} \ } \
} }
/*! Returns true if the element last searched for was found in the array */
#define BSEARCH_FOUND() (l_BSEARCH <= r_BSEARCH) #define BSEARCH_FOUND() (l_BSEARCH <= r_BSEARCH)
/*! Returns the position in the array at which the element last searched for
was found. */
#define BSEARCH_AT() (out_BSEARCH) #define BSEARCH_AT() (out_BSEARCH)