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Commit3225399

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Extend size_t support in pg_bitutils.h.
Use a more compact notation that allows us to add more size_t variantsas required. This will be used by a later commit.Reviewed-by: Tom Lane <tgl@sss.pgh.pa.us>Discussion:https://postgr.es/m/CA%2BhUKG%2B7dSX1XF8yFGmYk-%3D48dbjH2kmzZj16XvhbrWP-9BzRg%40mail.gmail.com
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‎src/include/port/pg_bitutils.h

Lines changed: 12 additions & 20 deletions
Original file line numberDiff line numberDiff line change
@@ -175,16 +175,6 @@ pg_nextpower2_64(uint64 num)
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return ((uint64)1) << (pg_leftmost_one_pos64(num)+1);
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}
177177

178-
/*
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* pg_nextpower2_size_t
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*Returns the next higher power of 2 above 'num', for a size_t input.
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*/
182-
#ifSIZEOF_SIZE_T==4
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#definepg_nextpower2_size_t(num) pg_nextpower2_32(num)
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#else
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#definepg_nextpower2_size_t(num) pg_nextpower2_64(num)
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#endif
187-
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/*
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* pg_prevpower2_32
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*Returns the next lower power of 2 below 'num', or 'num' if it's
@@ -211,16 +201,6 @@ pg_prevpower2_64(uint64 num)
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return ((uint64)1) <<pg_leftmost_one_pos64(num);
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}
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214-
/*
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* pg_prevpower2_size_t
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*Returns the next lower power of 2 below 'num', for a size_t input.
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*/
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#ifSIZEOF_SIZE_T==4
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#definepg_prevpower2_size_t(num) pg_prevpower2_32(num)
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#else
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#definepg_prevpower2_size_t(num) pg_prevpower2_64(num)
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#endif
223-
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/*
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* pg_ceil_log2_32
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*Returns equivalent of ceil(log2(num))
@@ -299,4 +279,16 @@ pg_rotate_left32(uint32 word, int n)
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return (word <<n) | (word >> (32-n));
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}
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282+
/* size_t variants of the above, as required */
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#ifSIZEOF_SIZE_T==4
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#definepg_leftmost_one_pos_size_t pg_leftmost_one_pos32
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#definepg_nextpower2_size_t pg_nextpower2_32
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#definepg_prevpower2_size_t pg_prevpower2_32
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#else
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#definepg_leftmost_one_pos_size_t pg_leftmost_one_pos64
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#definepg_nextpower2_size_t pg_nextpower2_64
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#definepg_prevpower2_size_t pg_prevpower2_64
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#endif
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302294
#endif/* PG_BITUTILS_H */

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