cpp/openttd-patchpack/source Changeset - r15150:91fd4208b6b3

Changeset - r15150:91fd4208b6b3

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rubidium - 14 years ago 2010-05-11 20:59:54
rubidium@openttd.org

(svn r19789) -Add [FS#3519]: a typed FOR_EACH_SET_BIT (adf88)

1 file changed with 28 insertions and 6 deletions:

src/core/bitmath_func.hpp

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src/core/bitmath_func.hpp

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@@ @@ -307,6 +307,31 @@ static FORCEINLINE T ROR(const T x, cons @@
+}
 /**
  * Do an operation for each set bit in a value.
+ *
  * This macros is used to do an operation for each set
  * bit in a variable. The second parameter is a
  * variable that is used as the bit position counter.
  * The fourth parameter is an expression of the bits
  * we need to iterate over. This expression will be
  * evaluated once.
+ *
  * @param Tbitpos_type Type of the position counter variable.
  * @param bitpos_var   The position counter variable.
  * @param Tbitset_type Type of the bitset value.
  * @param bitset_value The bitset value which we check for bits.
+ *
  * @see FOR_EACH_SET_BIT
  */
 #define FOR_EACH_SET_BIT_EX(Tbitpos_type, bitpos_var, Tbitset_type, bitset_value) \
 	for (                                                                           \
 		Tbitset_type ___FESBE_bits = (bitpos_var = (Tbitpos_type)0, bitset_value);    \
 		___FESBE_bits != (Tbitset_type)0;                                             \
 		___FESBE_bits = (Tbitset_type)(___FESBE_bits >> 1), bitpos_var++              \
 	)                                                                               \
 		if ((___FESBE_bits & 1) != 0)
 /**
  * Do an operation for each set set bit in a value.
+ *
  * This macros is used to do an operation for each set
@@ @@ -316,13 +341,10 @@ static FORCEINLINE T ROR(const T x, cons @@
  * we need to iterate over. This expression will be
  * evaluated once.
+ *
  * @param i The position counter
  * @param b The value which we check for set bits
  * @param bitpos_var   The position counter variable.
  * @param bitset_value The value which we check for set bits.
  */
 #define FOR_EACH_SET_BIT(i, b)      \
 	for (uint __FESB_bits = (i = 0, b); __FESB_bits != 0; i++, __FESB_bits >>= 1) \
 		if (__FESB_bits & 1)
 #define FOR_EACH_SET_BIT(bitpos_var, bitset_value) FOR_EACH_SET_BIT_EX(uint, bitpos_var, uint, bitset_value)
 #if defined(__APPLE__)
 	/* Make endian swapping use Apple's macros to increase speed

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