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kdecore: check for arc4random_uniform() and use it in KRandom::randomMax() if available

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Signed-off-by: Ivailo Monev <xakepa10@gmail.com>
This commit is contained in:
Ivailo Monev 2022-10-01 21:22:43 +00:00
parent af34fced45
commit f2b5c374ed
3 changed files with 14 additions and 3 deletions
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1
ConfigureChecks.cmake
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@ -45,6 +45,7 @@ check_symbol_exists(getgrouplist "unistd.h;grp.h" HAVE_GETGROUPLIST) # ki
check_function_exists(backtrace HAVE_BACKTRACE) # kdecore, kio check_function_exists(backtrace HAVE_BACKTRACE) # kdecore, kio
check_function_exists(fdatasync HAVE_FDATASYNC) # kdecore check_function_exists(fdatasync HAVE_FDATASYNC) # kdecore
check_function_exists(arc4random_uniform HAVE_ARC4RANDOM_UNIFORM) # kdecore
check_function_exists(sendfile HAVE_SENDFILE) # kioslave check_function_exists(sendfile HAVE_SENDFILE) # kioslave
check_library_exists(socket connect "" HAVE_SOCKET_LIBRARY) # kinit check_library_exists(socket connect "" HAVE_SOCKET_LIBRARY) # kinit

1
config.h.cmake
View file

@ -17,6 +17,7 @@
#cmakedefine HAVE_BACKTRACE 1 #cmakedefine HAVE_BACKTRACE 1
#cmakedefine HAVE_GETMNTINFO 1 #cmakedefine HAVE_GETMNTINFO 1
#cmakedefine HAVE_FDATASYNC 1 #cmakedefine HAVE_FDATASYNC 1
#cmakedefine HAVE_ARC4RANDOM_UNIFORM 1
#cmakedefine HAVE_SENDFILE 1 #cmakedefine HAVE_SENDFILE 1
#cmakedefine HAVE_SETMNTENT 1 #cmakedefine HAVE_SETMNTENT 1
#cmakedefine HAVE_STRTOLL 1 #cmakedefine HAVE_STRTOLL 1

9
kdecore/util/krandom.cpp
View file

@ -16,9 +16,14 @@
Boston, MA 02110-1301, USA. Boston, MA 02110-1301, USA.
*/ */
#include "config.h"
#include "krandom.h" #include "krandom.h"
#include "kdebug.h" #include "kdebug.h"
#if defined(HAVE_ARC4RANDOM_UNIFORM)
# include <stdlib.h>
#endif
int KRandom::randomMax(int max) int KRandom::randomMax(int max)
{ {
if (Q_UNLIKELY(max <= 0)) { if (Q_UNLIKELY(max <= 0)) {
@ -26,7 +31,11 @@ int KRandom::randomMax(int max)
return 0; return 0;
} }
#if defined(HAVE_ARC4RANDOM_UNIFORM)
return ::arc4random_uniform(max);
#else
return KRandom::random() % max; return KRandom::random() % max;
#endif
} }
QString KRandom::randomString(int length) QString KRandom::randomString(int length)