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| author | Brad King <brad.king@kitware.com> | 2011-05-17 14:07:26 (GMT) |
|---|---|---|
| committer | Brad King <brad.king@kitware.com> | 2011-05-17 14:07:26 (GMT) |
| commit | e1b0a11dd471e1593ade56897185a9d4dd2e0857 (patch) | |
| tree | b0f1efae3ec53531386f148ce75098e40d2b1e96 /Source/cmStringCommand.cxx | |
| parent | a77dfb6d64b24737167e4a0312fb842544f27961 (diff) | |
| download | CMake-e1b0a11dd471e1593ade56897185a9d4dd2e0857.zip CMake-e1b0a11dd471e1593ade56897185a9d4dd2e0857.tar.gz CMake-e1b0a11dd471e1593ade56897185a9d4dd2e0857.tar.bz2 | |
Improve string(RANDOM) default seed
The naive time(0) seed is unique only within one second. Instead try to
read a real source of entropy and otherwise fall back to a combination
of the process id and high-resolution time.
Diffstat (limited to 'Source/cmStringCommand.cxx')
| -rw-r--r-- | Source/cmStringCommand.cxx | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/Source/cmStringCommand.cxx b/Source/cmStringCommand.cxx index 19d2369..e3bf08f 100644 --- a/Source/cmStringCommand.cxx +++ b/Source/cmStringCommand.cxx @@ -770,7 +770,7 @@ bool cmStringCommand static bool seeded = false; bool force_seed = false; - int seed = (int) time(NULL); + int seed = 0; int length = 5; const char cmStringCommandDefaultAlphabet[] = "qwertyuiopasdfghjklzxcvbnm" "QWERTYUIOPASDFGHJKLZXCVBNM" @@ -825,7 +825,7 @@ bool cmStringCommand if (!seeded || force_seed) { seeded = true; - srand(seed); + srand(force_seed? seed : cmSystemTools::RandomSeed()); } const char* alphaPtr = alphabet.c_str(); |