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Use CHAR_BIT instead of assuming 8 bits

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* src/c++11/random.cc (random_device::_M_getentropy): Use __CHAR_BIT__
	instead of fixed number of bits.

From-SVN: r248428
This commit is contained in:
Jonathan Wakely 2017-05-24 20:27:28 +01:00 committed by Jonathan Wakely
parent 216bfadc5d
commit b678436176
2 changed files with 8 additions and 2 deletions
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5
libstdc++-v3/ChangeLog
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@ -1,3 +1,8 @@
2017-05-24 Jonathan Wakely <jwakely@redhat.com>
* src/c++11/random.cc (random_device::_M_getentropy): Use __CHAR_BIT__
instead of fixed number of bits.
2017-05-24 Andreas Schwab <schwab@suse.de>
* config/abi/post/ia64-linux-gnu/baseline_symbols.txt: Update.

5
libstdc++-v3/src/c++11/random.cc
View File

@ -187,8 +187,9 @@ namespace std _GLIBCXX_VISIBILITY(default)
if (ent < 0)
return 0.0;
if (static_cast<unsigned>(ent) > sizeof(result_type) * 8)
return static_cast<double>(sizeof(result_type) * 8);
const int max = sizeof(result_type) * __CHAR_BIT__;
if (ent > max)
ent = max;
return static_cast<double>(ent);
#else