[ Merge of http://go/wvgerrit/89766 ]
Certain C++11 (and newer) standard library functions and classes which
utilize random number generators require that the random number
generators meet the specifications of C++11's UniformRandomBitGenerator
name requirements. This is especially important as C++17 will remove
support non-compliant alternatives.
This change updates CdmRandomGenerator to meet these requirements.
Bug: 143494945
Test: Linux and Android unit tests
Change-Id: Ib6df44da4969ad7596b16d447c3f8bd9864698f6
[ Merge of http://go/wvgerrit/84607 ]
[ Merge of http://go/wvgerrit/84608 ]
The primary goal is to replace the use of `rand()` with the random
number generators provided with the C++11 standard.
This simplified generator wraps some of the technical aspects of the
<random> library and provides an interface for uniformly distributed
integers.
As part of the `rand()` purge in the CDM, all uses of the C random int
function in `core()` have been removed. Places that previously used
`rand()` now use `CdmRandom` facilities.
Test: Linux unittest and Android unittest
Bug: 130680365
Change-Id: Ica383870536ed462dbb80e630c2d66845e38b937
